Haruki NagakawaAssistant Professor
■Researcher basic information
Organization
Educational Background
Career
- Jan. 2024 - Present, Ibaraki University, Carbon Recycling Energy Research Center, 兼務教員
- Dec. 2023 - Present, The University of Tokyo, Institute of Industrial Science, Associate Research Fellow
- Oct. 2023 - Present, Ibaraki University, Graduate School of Science and Engineering, 助教
- Apr. 2022 - Sep. 2023, The University of Tokyo, Institute of Industrial Science, 日本学術振興会 特別研究員PD
- Apr. 2020 - Mar. 2022, Tokyo University of Science, Graduate School of Engineering, 日本学術振興会 特別研究員DC1
External link
■Research activity information
Award
- Sep. 2024, マツダ研究助成奨励賞, 公益財団法人 マツダ財団
- Dec. 2023, 第17回学術奨励賞, 東京理科大学 理窓博士会
- Jun. 2023, 「90周年記念講演ポスターセッション」優秀賞, 電気化学会
- Mar. 2022, 2021年度 東京理科大学大村賞, 東京理科大学
- Mar. 2022, 東京理科大学 2021年度学生表彰, 東京理科大学
- Jan. 2022, 第12回 日本学術振興会 育志賞, 日本学術振興会
- Sep. 2021, 2021年光化学討論会 優秀学生発表賞(ポスター), Elucidation of the Effect of Type II Electron Transfer on Photocatalytic Hydrogen Production, 光化学協会
- Mar. 2021, 日本化学会 第101回春季年会 学生講演賞, Photoreforming of Lignocellulosic Biomass into Hydrogen Utilizing the Entire Visible Range of Light in the Presence of Composite Photocatalyst, 日本化学会
- Mar. 2020, 東京理科大学, 2019年度 東京理科大学奨励賞
- Mar. 2020, 東京理科大学 2019年度学生表彰, 東京理科大学
- May 2018, Poster prizes at the EEPM3 2018 conference first ex-aequo, Efficient H2 production and solving the fundamental problems of CdS photocatalyst by cascadal carrier transfer in the reverse direction, Applied Surface Science
- Mar. 2018, 2017年度 東京理科大学奨励賞, 東京理科大学
- Mar. 2018, 東京理科大学 2017年度学生表彰, 東京理科大学
Paper
- Photocatalytic Synthesis of Au Nanoplates
Haruki Nagakawa; Tetsu Tatsuma, Lead, Shape-controlled Au nanoparticles are synthesized in general by liquid-phase chemical reactions that require reducing and organic protective agents as well as an Au complex, via seed-mediated growth. In the present study, we report a one-step photocatalytic synthesis of Au nanoplates and their dispersion in aqueous solution without using any reducing or organic protecting agents, simply by irradiating a TiO2 substrate with ultraviolet (UV) light in an aqueous solution containing [AuCl4]−. Chemical species necessary for Au nanoplate formation, such as [AuCl2]−, should be generated through photocatalytic reactions, and Au nanoplates without a thick organic protective layer are grown in the solution phase. X-ray diffraction (XRD) measurements revealed that the obtained Au nanoplates are single crystals with (111) as the basal planes. Additionally, it was demonstrated that the nanoplates deposited on glass show sufficient electronic conductivity and that the nanoplates are metallic, and they can directly exchange electrons with each other.
Crystal Growth and Design, 20 Sep. 2024, [Reviewed] - Synthesis and Photoreforming Reaction of CdS Prepared from MOF Precursor
Sora Kamata; Haruki Nagakawa; Ayako Inaguma; Morio Nagata, Lead
ChemPhotoChem, Sep. 2024, [Reviewed] - Introduction and Quantification of Sulfide Ion Defects in Highly Crystalline CdS for Photocatalysis Applications
Haruki Nagakawa, Lead
physica status solidi (a), Jun. 2024, [Reviewed] - Influence of Sacrificial Reagents on the Photodeposition Reaction of Cocatalysts
Ayako Inaguma; Haruki Nagakawa; Sora Kamata; Morio Nagata, Lead
Advanced Energy and Sustainability Research, May 2024, [Reviewed] - Facet-Selective Photoelectrochemical Reactions on Wurtzite CdS Photocatalysts
Haruki Nagakawa; Tetsu Tatsuma, Lead, Some of the photocatalytic reactions take place selectively at specific crystal planes, and knowledge in this regard has attracted much attention from the viewpoint of designing advanced and sophisticated photocatalysts. Here we report some novel facet-selective photoreduction and photo-oxidation reactions for wurtzite CdS. First we deposited Pt nanoparticles onto CdS by direct photodeposition (PD method) or an indirect process via entrapment of photoexcited electrons by reduction of Cd(II) to metallic Cd, followed by its galvanic replacement with Pt (ETD method). The PD method allowed small Pt nanoparticles to be deposited selectively on the CdS(101) facets, whereas Pt nanoparticles were deposited almost uniformly on all of the facets by the ETD method. Those CdS particles with Pt nanoparticles also showed facet-selective photocorrosion reactions based on self-oxidation. CdS-Pt prepared by the PD method exhibited selective photocorrosion at the CdS(101) facets in pure water. In the case of CdS-Pt prepared by the ETD method, however, the photocorrosion occurred selectively at the CdS(001) facets in the presence of lactic acid. These facet-selective reactions would allow the wurtzite CdS to be designed for sophisticated photocatalytic systems., AMER CHEMICAL SOC
JOURNAL OF PHYSICAL CHEMISTRY C, 04 Oct. 2023, [Reviewed] - Well-dispersed Au co-catalyst deposited on a rutile TiO2 photocatalyst via electron traps
Tomoki Akiyama; Haruki Nagakawa; Tetsu Tatsuma
Physical Chemistry Chemical Physics, 10 Mar. 2023, [Reviewed] - Highly Crystalline Wurtzite CdS Prepared by a Flux Method and Application to Photocatalysis
Haruki Nagakawa; Tetsu Tatsuma, Lead, American Chemical Society ({ACS})
ACS Applied Energy Materials, 26 Dec. 2022, [Reviewed] - Energy Conversion Using Photocatalysts Learning from Photosynthesis
Haruki NAGAKAWA; Morio NAGATA, Lead, Japan Society of Colour Material
Journal of the Japan Society of Colour Material, 20 Sep. 2022, [Invited] - Highly Efficient Photocatalytic Degradation of Hydrogen Sulfide in the Gas Phase Using Anatase/TiO2(B) Nanotubes
Yukino Uesugi; Haruki Nagakawa; Morio Nagata, American Chemical Society ({ACS})
ACS Omega, 12 Apr. 2022, [Reviewed] - Highly Efficient Hydrogen Production in the Photoreforming of Lignocellulosic Biomass Catalyzed by Cu,In-Doped ZnS Derived from ZIF-8
Haruki Nagakawa; Morio Nagata, Lead, Cu,In-doped ZnS (CIZS) is fabricated from a metal–organic framework (MOF) precursor, namely a Cu,In-doped zeolitic imidazolate framework (ZIF-8). The prepared CIZS shows high activity for hydrogen production in the photoreforming reaction of lignocellulosic biomass under simulated sunlight. The activity is 125-fold greater than that of undoped ZnS produced by the same method. Compared to CIZS synthesized by the conventional solvothermal method for sulfide photocatalysts, the CIZS synthesized via a MOF is characterized by high crystallinity and an 8.9-fold increase in hydrogen production activity. This catalyst also exhibits better performance than conventional photoreforming catalysts, while it is free from toxic substances, such as Cd, or expensive cocatalysts, like Pt. In addition, the prepared CIZS is stable in photocatalytic reactions and achieves an apparent quantum yield of ≈28% under 360-nm light irradiation.
Advanced Materials Interfaces, 14 Jan. 2022, [Reviewed] - Photoreforming of Organic Waste into Hydrogen Using a Thermally Radiative CdO
x /CdS/SiC Photocatalyst
Haruki Nagakawa; Morio Nagata, Lead, To achieve superior efficiency for photocatalytic reactions, it is necessary to utilize visible light, which accounts for most of the solar energy. Herein, by applying a photocatalytic reaction, we aimed to develop a method for generating hydrogen by reforming organic waste, which is discharged as part of domestic, agricultural, forestry, and industrial practice. In the prepared CdS/SiC composite photocatalyst, etching of the oxide film of SiC and oxidation of the atomic-level surface of CdS proceeded in an alkaline reaction solution to form a CdOx/CdS/SiC composite. This composite is stable under light irradiation in a high-temperature alkaline reaction solution and can steadily promote hydrogen production. CdOx/CdS/SiC exhibits absorption in the entire ultraviolet and visible light region. In particular, the visible light region on the long-wavelength side, which is derived from the crystal defect of SiC, was used for heat radiation, and it was effective in increasing the temperature of the reaction solution. The high-temperature alkaline reaction solution promoted the hydrolysis of organic wastes with high molecular weight. Elution of small organic molecules by this process facilitated the progress of photocatalytic reactions and improved the rate of hydrogen production. Furthermore, in the absorption region derived from the interband transition below 580 nm, electron transfer between SiC and CdS suppressed recombination and improved the photocatalytic activity. Particularly, we achieved a high quantum yield of almost 20% in the ultraviolet region of 380 nm, where electron transfer from SiC was remarkable. Even in the visible light region, 2.0% was achieved at 420 nm, indicating an activity superior to that of conventional photoreforming systems. Using the developed photocatalytic system, we succeeded in producing hydrogen by photoreforming organic waste, such as cellulosic biomass, animal biomass, and plastic, under sunlight. Therefore, it is possible to solve waste disposal, environmental, and energy problems using sustainable photocatalytic processes.
ACS Applied Materials and Interfaces, 13 Oct. 2021, [Reviewed] - Photoreforming of Lignocellulosic Biomass into Hydrogen under Sunlight in the Presence of Thermally Radiative CdS/SiC Composite Photocatalyst
Haruki Nagakawa; Morio Nagata, Lead, We have established a highly efficient protocol for hydrogen production from lignocellulosic biomass at high temperatures in an alkaline solution using a stable CdS/SiC composite. The composite absorbed light in the entire visible range, and the excited electrons were consumed for hydrogen production and efficient thermal radiation. Most importantly, the apparent quantum yields obtained using this method were significantly higher than those obtained using the conventional methods.
ACS Applied Energy Materials, 22 Feb. 2021, [Reviewed] - Elucidating the Factors Affecting Hydrogen Production Activity Using a CdS/TiO
2 Type-II Composite Photocatalyst
Haruki Nagakawa; Morio Nagata, Lead, CdS/TiO2 is a composite photocatalyst that has been studied over many years and in which electron transfer from CdS to TiO2 is believed to lead to high photocatalytic activity. However, most reports on improved activity involve hydrogen production in the presence of a sulfide reducing agent. In this study, we comprehensively examined the effects of electron transfer, hydrogen overvoltage, substrate adsorption, and the cocatalyst from relationships between hydrogen production ability and the total number of trapped electrons in the presence of various reducing agents. As a result, we clarified that the electron transfer between CdS and TiO2 does not necessarily lead to high activity. We showed that the composite photocatalyst needs to be designed for the intended purpose and that evaluating the hydrogen production ability using sacrificial reagents provides insufficient information for use in an actual environment.
ACS Omega, 16 Feb. 2021, [Reviewed] - Elucidation of the electron energy structure of TiO
2 (B) and anatase photocatalysts through analysis of electron trap density
Haruki Nagakawa; Tsuyoshi Ochiai; He Ma; Changhua Wang; Xintong Zhang; Yang Shen; Mai Takashima; Bunsho Ohtani; Morio Nagata, Lead, A clear understanding of the electron energy structure of TiO2(B)/anatase is needed to study the related catalytic reactions and design new composite photocatalysts. In this study, the electron energy structures of TiO2(B) and anatase were estimated by analyzing the energy-resolved distribution of electron traps measured by reversed double-beam photoacoustic spectroscopy. In the mixture of TiO2(B) and anatase, interfacial charge-transfer excitation from anatase to electron traps of TiO2(B) was suggested. By analyzing this for TiO2(B), the electron level with a relatively high density of states was found to be located ~0.07 eV deeper than that for anatase. Furthermore, a similar electron energy structure was suggested for a composite photocatalyst having a mixed phase of TiO2(B) and anatase.
RSC Advances, 15 May 2020, [Reviewed] - Water purification in dark conditions using photocatalytic light-leakage type plastic optical fiber
Haruki Nagakawa; Takuya Sato; Goki Takahashi; Tsuyoshi Ochiai; Rei Furukawa; Morio Nagata, Lead, In this study, we fabricated a device that can be used for water purification in dark areas by combining a light-leakage type plastic optical fiber with a photocatalyst. The light-leakage type fiber was prepared by adding a scattering agent to the fiber core, and the titanium dioxide photocatalyst was composited by a two-layer coating method. Photocatalytic decomposition of methylene blue was performed by introducing light into the fiber without direct light irradiation.
Chemistry Letters, Feb. 2020, [Reviewed] - Enhancement of Photocurrent by Integration of an Artificial Light-Harvesting Antenna with a Photosystem i Photovoltaic Device
Yuya Takekuma; Haruki Nagakawa; Tomoyasu Noji; Keisuke Kawakami; Rei Furukawa; Mamoru Nango; Nobuo Kamiya; Morio Nagata, Photosynthetic pigment-protein-based biophotovoltaic devices are attracting interest as environmentally friendly energy sources. Photosystem I (PSI), a photosynthetic pigment-protein, is a proven biophotovoltaic material because of its abundance and high charge separation quantum efficiency. However, the photocurrent of these biophotovoltaic devices is not high because of their low spectral response. We have integrated an artificial light-harvesting antenna into a PSI-based biophotovoltaic device to expand the spectral response. To fabricate the device, a perylene di-imide derivative (PTCDI) was introduced onto a TiO2 surface as an artificial antenna. In the photovoltaic cells formed by the PTCDI/PSI-assembled TiO2 electrode, the magnitude of the incident photon-to-current conversion efficiency spectrum was significantly enhanced in the range 450-750 nm, and the photocurrent increased to 0.47 mA/cm2. The result indicates that the photons absorbed by PTCDI transfer to PSI via Förster resonance energy transfer.
ACS Applied Energy Materials, 24 Jun. 2019, [Reviewed] - Efficient hydrogen production using photosystem I enhanced by artificial light harvesting dye
Haruki Nagakawa; Ayano Takeuchi; Yuya Takekuma; Tomoyasu Noji; Keisuke Kawakami; Nobuo Kamiya; Mamoru Nango; Rei Furukawa; Morio Nagata, Lead, In this study, we improved the hydrogen production efficiency by combining photosystem I with an artificial light harvesting dye, Lumogen Red. In the reaction system, Lumogen Red allows light absorption and energy transfer to photosystem I by Förster resonance energy transfer; therefore, the Pt nanoparticles act as active sites for hydrogen generation.
Photochemical and Photobiological Sciences, 2019, [Reviewed] - In situ synthesis of CdS/CdWO
4 nanorods core-shell composite via acid dissolution
Haruki Nagakawa; Morio Nagata, Lead, The prevention of photocorrosion in photocatalysts allows for the use of a wide variety of visible-light-responsive photocatalysts, leading to highly efficient photocatalytic reactions. This study aimed to avoid the photocorrosion issues associated with pure CdS, a known photocorrosive photocatalyst, by forming a stable CdWO4 shell on the surface of a CdS core. The CdS/CdWO4 core-shell composite was formed using a unique method based on CdS elution under acidic conditions. An optimal CdWO4 nanorod shell was formed at a pH of 0.8, a reaction time of 30 min, and a calcination temperature of 400 °C, where the core remained intact and was sufficiently coated. The prepared CdS/CdWO4 core-shell composite was shown to be stable when exposed to light irradiation in pure water. Furthermore, it was successfully used in water splitting with an oxidation reaction side photocatalyst. This core-shell synthesis method based on core dissolution was easily and highly controlled, and is suitable for use in other similar core-shell composite applications.
RSC Advances, 2019, [Reviewed] - Visible-Light Overall Water Splitting by CdS/WO
3 /CdWO4 Tricomposite Photocatalyst Suppressing Photocorrosion
Haruki Nagakawa; Tsuyoshi Ochiai; Seiji Konuma; Morio Nagata, Lead, Photocatalytic water splitting under visible light has attracted attention as a possible solution to the energy exhaustion problem. Hitherto, water splitting has been generally achieved using several oxynitrides, oxysulfides, and nitrides, and only a few studies report water splitting using cadmium sulfide (CdS) as a photocatalyst. A major reason for this is that CdS undergoes photocorrosion. In this study, we achieved an overall water splitting under visible light using a CdS/WO3/CdWO4 tricomposite photocatalyst. In the process, photocorrosion of CdS was suppressed by covering it with WO3 and CdWO4, and the oxidation reaction progressed in WO3 by the Z-scheme type photocatalytic reaction.
ACS Applied Energy Materials, 24 Dec. 2018, [Reviewed] - Photocatalytic oxidation of aqueous ammonia to nitrite and nitrate ions on zeoliteTiO
2
Sachiko Haga; Haruki Nagakawa; Tsuyoshi Ochiai; Morio Nagata, We herein report the oxidation efficiency of different concentration ammonia waters via a complex photocatalyst of zeolite and TiO 2 under UV light. The generated NO 21 and NO 31 concentrations were highest when a high concentration of ammonia was oxidized by zeoliteTiO 2 . The prepared photocatalyst was characterized via X-ray diffraction, and BrunauerEmmettTeller surface area measurement.
Chemistry Letters, 31 Oct. 2018, [Reviewed] - Effective Photocatalytic Hydrogen Evolution by Cascadal Carrier Transfer in the Reverse Direction
Haruki Nagakawa; Tsuyoshi Ochiai; Yuya Takekuma; Seiji Konuma; Morio Nagata, Lead, Visible-light-responsive photocatalysts used in the highly efficient hydrogen production exhibit several disadvantages such as photocorrosion and fast recombination. Because of the potential important applications of such catalysts, it is crucial that a simple, effective solution is developed. In this respect, in this study, we combined SiC (β modification) and TiO2 with CdS to overcome the challenges of photocorrosion and fast recombination of CdS. Notably, we found that when irradiated with visible light, CdS was excited, and the excited electrons moved to the conduction band of TiO2, thereby increasing the efficiency of charge separation. In addition, by moving the holes generated on CdS to the valence band of SiC, in the opposite direction of TiO2, photocorrosion and fast recombination were prevented. As a result, in the sulfide solution, the CdS/SiC composite catalyst exhibited 4.3 times higher hydrogen generation ability than pure CdS. Moreover, this effect was enhanced with the addition of TiO2, giving 10.8 times higher hydrogen generation ability for the CdS/SiC/TiO2 catalyst. Notably, the most efficient catalyst, which was obtained by depositing Pt as a cocatalyst, exhibited 1.09 mmol g-1 h-1 hydrogen generation ability and an apparent quantum yield of 24.8%. Because water reduction proceeded on the TiO2 surface and oxidative sulfide decomposition proceeded on the SiC surface, the exposure of CdS to the solution was unnecessary, and X-ray photoelectron spectroscopy confirmed that photocorrosion was successfully suppressed. Thus, we believe that the effective composite photocatalyst construction method presented herein can also be applied to other visible-light-responsive powder photocatalysts having the same disadvantages as CdS, thereby improving the efficiency of such catalysts.
ACS Omega, 31 Oct. 2018, [Reviewed] - Fabrication of CdS/Β-SiC/TiO
2 tri-composites that exploit hole- and electron-transfer processes for photocatalytic hydrogen production under visible light
Haruki Nagakawa; Tsuyoshi Ochiai; Morio Nagata, Lead, In this work, CdS/SiC/TiO2 tri-composite photocatalysts that exploit electron- and hole-transfer processes were fabricated using an easy two-step method in the liquid phase. The photocatalyst with a 1:1:1 M ratio of CdS/SiC/TiO2 exhibited a rate of hydrogen evolution from an aqueous solution of sodium sulfite and sodium sulfide under visible light of 137 μmol h−1 g−1, which is 9.5 times that of pure CdS. β-SiC can act as a sink for the photogenerated holes because the valence band level of β-SiC is higher than the corresponding bands in CdS and TiO2. In addition, the level of the conduction band of TiO2 is lower than those of CdS and β-SiC, so TiO2 can act as the acceptor of the photogenerated electrons. Our results demonstrate that hole transfer and absorption in the visible light region lead to an effective hydrogen-production scheme.
International Journal of Hydrogen Energy, 25 Jan. 2018, [Reviewed]
MISC
- Highly Efficient Hydrogen Production By Photoetched CdS-Pt
Haruki Nagakawa; Tetsu Tatsuma
ECS Meeting Abstracts, 22 Nov. 2024
Lead - Facet-Dependent Photocatalytic Deposition of Metal Nanoparticles Onto Rutile TiO2
Tomoki Akiyama; Haruki Nagakawa; Tetsu Tatsuma
ECS Meeting Abstracts, 22 Nov. 2024 - Over All Water Splitting By Anti-Photocorrosive Core-Shell Composite Sulfide Photocatalyst Synthesized Via Acid Dissolution Process
Haruki Nagakawa; Morio Nagata
ECS Meeting Abstracts, 23 Nov. 2020, [Reviewed]
Lead
Lectures, oral presentations, etc.
- Highly Efficient Hydrogen Production By Photoetched CdS-Pt
Haruki Nagakawa; Tetsu Tatsuma
PRiME 2024, 09 Oct. 2024
20241006, 20241011 - Facet-Dependent Photocatalytic Deposition of Metal Nanoparticles Onto Rutile TiO2
Tomoki Akiyama; Haruki Nagakawa; Tetsu Tatsuma
PRiME 2024, 08 Oct. 2024
20241006, 20241011 - 太陽光のエネルギーで水素を作り出す
長川遥輝
2024年度 東京理科大学 公開講座「坊っちゃん講座」, 18 May 2024, [Invited]
20240518 - 酸化チタン上における結晶面選択的な金属ナノ粒子の光触媒析出
秋山倫輝; 長川遥輝; 立間徹
電気化学会第91回大会, 16 Mar. 2024
20240314, 20240316 - 硫化物光触媒を用いた廃棄物の光改質による水素製造
長川遥輝
KISTEC Innovation Hub 2023 光触媒技術フォーラム, 16 Nov. 2023, [Invited]
20231116 - 銀ナノ粒子の光触媒析出形態に対する酸化チタン焼成温度の効果
秋山倫輝; 長川遥輝; 立間徹
第13回CSJ化学フェスタ2023, 18 Oct. 2023
20231017, 20231019 - 有機保護剤を用いない金ナノプレートの光触媒合成
長川遥輝; 立間徹
2023年電気化学秋季大会, 12 Sep. 2023
20230911, 20230912 - Highly efficient hydrogen production in the photoreforming by CdS photocatalyst via MOF precursor
Sora Kamata; Haruki Nagakawa; Ayako Inaguma; Morio Nagata
The 31st International Conference on Photochemistry, 26 Jul. 2023
20230723, 20230728 - Importance of sacrificial reagents in the preparation of co-catalyst loaded TiO2
Ayako Inaguma; Haruki Nagakawa; Sora Kamata; Morio Nagata
The 31st International Conference on Photochemistry, 26 Jul. 2023
20230723, 20230728 - 廃棄物のフォトリフォーミングによる水素製造
長川遥輝; 立間徹
電気化学会「90周年記念ポスターセッション」, 28 Jun. 2023 - 硫化カドミウム光触媒の結晶面選択的な光電気化学反応
長川遥輝; 立間徹
電気化学会 第90回大会, 27 Mar. 2023 - 溶融塩処理による高結晶性ウルツ鉱型CdS光触媒の作製
長川遥輝; 立間徹
日本化学会第103春季年会, 23 Mar. 2023 - 電子トラップを活用したAu助触媒担持型ルチルTiO2光触媒
秋山倫輝; 長川遥輝; 立間徹
日本化学会第103春季年会, 23 Mar. 2023 - 電子トラップを活用した金属ナノ粒子複合型光触媒の開発
秋山倫輝; 長川遥輝; 立間徹
2022年電気化学秋季大会, 08 Sep. 2022 - Highly efficient photocatalytic degradation sulfide in a gas phase using anatase/TiO₂(B) heterojunction
Yukino Uesugi; Haruki Nagakawa; Morio Nagata
Pacifichem 2021
20211216, 20211221 - Photoreforming of lignocellulosic biomass into hydrogen using copper and indium doped ZnS photocatalyst derived from zeolitic-imidazolate-framework-8
Haruki Nagakawa; Morio Nagata
Pacifichem 2021
20211216, 20211221 - anatase/TiO2(B)を用いた硫化水素気相分解における酸化メカニズムの解明
上杉 行乃; 長川 遥輝; 永田 衞男
CSJ化学フェスタ2021
20211019, 20211021 - MOF前駆体由来の硫化物光触媒を用いた木質バイオマスの光改質による水素生成
長川 遥輝; 永田 衞男
CSJ化学フェスタ2021
20211019, 20211021 - Hydrogen production system using household wastewater as main material of photocatalyst and sacrificial agent
Joevandi Dewantara; Haruki Nagakawa; Morio Nagata
Annual Meeting on Photochemistry 2021
20210914, 20210916 - Elucidation of the Effect of Type II Electron Transfer on Photocatalytic Hydrogen Production
Haruki Nagakawa; Morio Nagata
Annual Meeting on Photochemistry 2021
20210914, 20210916 - 複合光触媒を用いた有機性廃棄物の光改質による水素生成
長川遥輝; 永田衞男
電気化学会 第88回大会
20210322, 20210324 - Photoreforming of Lignocellulosic Biomass into Hydrogen Utilizing the Entire Visible Range of Light in the Presence of Composite Photocatalyst
長川遥輝; 永田衞男
日本化学会 第101回春季年会
20210319, 20210322 - Over All Water Splitting By Anti-Photocorrosive Core-Shell Composite Sulfide Photocatalyst Synthesized Via Acid Dissolution Process
Haruki Nagakawa; Morio Nagata
PRiME2020
20201004, 20201009 - Hydrogen Production by Cadmium Sulfide Photocatalyst Prepared by Potassium Sulfide
Satoshi Akiyama; Haruki Nagakawa; Morio Nagata
The 3rd International Symposium on Recent Progress of Energy and Environmental Photocatalysis (Photocatalysis 3), 29 Nov. 2019 - Visible Light Water Splitting using CdS/WO3/CdWO4 Tri-Composite Synthesized via Acid Dissolution Process
Haruki Nagakawa; Morio Nagata
The 3rd International Symposium on Recent Progress of Energy and Environmental Photocatalysis (Photocatalysis 3), 29 Nov. 2019 - Preparation of Polymer Optical Fiber and Water Purification
Goki Takahashi; Haruki Nagakawa; Takuya Sato; Tsuyoshi Ochiai; Rei Furukawa; Morio Nagata
The 28th International Conference on Plastic Optical Fibers (POF 2019)
20191120, 20191122 - 革新的なシェル合成技術による耐光腐食性光触媒の開発と可視光下での水分解への応用
長川遥輝; 永田衞男
第9回CSJ化学フェスタ2019
20191015, 20191017 - Elucidation of electron energy-structure of mixed different titania-mixed photocatalysts by analysis of electron-traps density
Haruki Nagakawa; Tsuyoshi Ochiai; He Ma; Changhua Wang; Xintong Zhang; Yang Shen; Mai Takashima; Bunsho Ohtani; Morio Nagata
2019年光化学討論会
20190910, 20190912 - 光合成タンパク質複合体(PSI)/白金ナノ粒子/ルモゲンレッド用いた蛍光励起エネルギー移動による光水素発生
竹内彩乃; 長川遥輝; 永田衞男
第24回シンポジウム 光触媒反応の最近の展開, 30 Nov. 2018 - Enhancement of Photocurrent by Perylene Derivative as Artificial Light-Harvesting Antenna for Photosystem I-based Photovoltaic Device
Yuya Takekuma; Haruki Nagakawa; Morio Nagata
The 69th Annual Meeting of the International Society of Electrochemistry
20180903, 20180907 - Pure Water Splitting under Visible Light with Triple Composite Photocatalyst Suppressing Photocorrosion of CdS
Haruki Nagakawa; Tsuyoshi Ochiai; Morio Nagata
The 69th Annual Meeting of the International Society of Electrochemistry, 03 Sep. 2018
20180907 - Water Splitting with Anti Photocorrosive CdS Composite Photocatalyst
Haruki Nagakawa; Tsuyoshi Ochiai; Morio Nagata
Pre-conference of TOCAT8 and the 5th International Symposium of Institute for Catalysis (ICAT), 04 Aug. 2018 - Photo hydrogen production with Photosystem I (PSI)/Pt nanoparticle and LumogenRed
Ayano Takeuchi; Haruki Nagakawa; Morio Nagata
Pre-conference of TOCAT8 and the 5th International Symposium of Institute for Catalysis (ICAT), 03 Aug. 2018 - Visible Light Water Splitting Using Anti-Photocorrosive CdS Tri-Composite Photocatalyst
Haruki Nagakawa; Tsuyoshi Ochiai; Morio Nagata
Workshop on Semiconductor Photochemistry (2018), 18 Jul. 2018 - Efficient H2 production and solving the fundamental problems of CdS photocatalyst by cascadal carrier transfer in the reverse direction
Haruki Nagakawa; Tsuyoshi Ochiai; Morio Nagata
3rd International Symposium on Energy and Environmental Photocatalytic Materials (EEPM3), 16 May 2018 - Photocatalytic hydrogen production and decomposition of hydrogen sulfide under visible light with anti-photocorrosive tri-composite photocatalysts
Haruki Nagakawa; Morio Nagata
日本化学会第98春季年会, 22 Mar. 2018 - Fabrication of CdS/β-SiC/TiO2 Tri-Composite Photocatalyst for Hydrogen Production under Visible Light Irradiation
Haruki Nagakawa; Morio Nagata; Tsuyoshi Ochiai
Joint Symposium of The 2nd International Symposium on Recent Progress of Energy and Environmental Photocatalysis & The 23rd China-Japan Bilateral Synposium on Intelligent Electrophotonic Materials and Molecular Electronics(Photocatalysis 2 & SIEMME'23), 02 Dec. 2017
Courses
Affiliated academic society
Research Themes
- メカノケミカル法を用いた結晶歪みの導入による新規光触媒材料の開発
茨城大学
Apr. 2025 - Mar. 2027 - 光改質反応による廃プラスチックの資源化
Sep. 2024 - Jul. 2026 - 環境負荷を低減した光改質系によるグリーン水素製造と資源循環
Apr. 2024 - Mar. 2025 - 太陽光を利用した光触媒による機能性有機分子の再利用
基盤共同研究
Apr. 2024 - Mar. 2025 - プラスチック製パッケージの光改質による水素及び液体燃料の製造
Apr. 2024 - Mar. 2025 - ナノスケールで三次元的に制御した高性能複合光触媒の開発と水素生成への応用
Grant-in-Aid for JSPS Fellows
The University of Tokyo
Apr. 2022 - Mar. 2025
Social Contribution Activities
