Article
Engineering, Environmental
Rudzani Ratshiedana, Olayemi Jola Fakayode, Ajay Kumar Mishra, Alex Tawanda Kuvarega
Summary: The study focuses on the impact of silver ion doping on the photocatalytic activity of titanium dioxide for the degradation of tartrazine. Results show that optimal degradation of tartrazine can be achieved with a certain amount of doping, suggesting potential applications for removing similar organic pollutants from water.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Myrthe Van Hal, Silvia Lenaerts, Sammy W. Verbruggen
Summary: This study evaluates the performance of a visible light-active photocatalyst, WO3, compared to TiO2 under both UV and visible light. It also demonstrates an improved digital image-based analysis method for accurate detection and quantification of soot degradation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Alejandra Romero-Moran, Jose L. Sanchez-Salas, Joel Molina-Reyes
Summary: The study established the influence of the crystalline phase and agglomeration degree of TiO2 nanoparticles on photocatalytic hydroxyl radical formation and bacterial inactivation in TiO2/SiO2 composite coatings. A relationship between hydroxyl radicals' formation and charge carrier transfer mechanism between defect levels in SiO2 and TiO2 embedded nanoparticles was established through a simple spectroscopic method. This correlation complements the lack of mechanisms behind the photocatalytic activity in TiO2/SiO2 composites.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Environmental Sciences
Devagi Kanakaraju, Muhamad Akif Aizuddin Jasni, Andrea Pace, Muhamad Hazim Ya
Summary: The Cu/TiO2/FA composite was optimized for the removal of the model dye pollutant methyl orange under visible light irradiation using response surface methodology and Box-Behnken experimental design. The study considered three independent variables and achieved a 99.91% removal rate under the optimal operating conditions. The results support the hypothesis of a combined and synergic adsorption-photocatalytic degradation process for pollutant removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Chaehun Lim, Ha-Rim An, Seongmin Ha, Seongjae Myeong, Chung Gi Min, Hea-Jong Chung, Byoungchul Son, Chang-Yeon Kim, Ji-In Park, Hyeran Kim, Hyun Uk Lee, Young-Seak Lee
Summary: We propose an underwater plasma method to produce nanoporous N-doped TiO2 (N-TiO2) photocatalysts with high reactivity in the visible light range. The unique energy input of this technology enables the synthesis, crystallization, doping, and porosity of TiO2 within minutes. The resulting N-TiO2 demonstrates a nanoporous structure with doped N atoms, which leads to narrow bandgap, effective charge-carrier separation, and enhanced light absorbing ability. The N-TiO2 photocatalysts exhibit efficient photocatalytic activities and excellent antibacterial ability, making them suitable for environmental and biomedical applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Anna Yu Kurenkova, Anastasiya Yu Yakovleva, Andrey A. Saraev, Evgeny Yu Gerasimov, Ekaterina A. Kozlova, Vasily V. Kaichev
Summary: This study proposes titania-based photocatalysts modified with copper compounds for hydrogen evolution and tests their photocatalytic activity. The synthesized photocatalysts are characterized using various methods, and the results show that the heat-treated and copper oxide deposited photocatalysts exhibit high activity under both UV and visible light irradiation.
Article
Chemistry, Physical
Laura Ibanez-Ibanez, Ariadna Lazaro, Carmen Mejuto, Margarita Crespo, Cristian Vicent, Laura Rodriguez, Jose A. Mata
Summary: In this study, the catalytic properties of pincer platinum complexes in alkyne hydrosilylation were investigated under both photo and thermal conditions. The results showed that visible light-induced hydrosilylation was more efficient, requiring lower catalyst loadings and allowing room temperature reactions. The platinum complexes acted as both photosensitizers and catalysts, enabling bond breaking/forming transformations. The reaction selectivity differed under photochemical and thermal conditions, with the photoinduced process exhibiting enhanced regio- and stereoselectivity.
JOURNAL OF CATALYSIS
(2023)
Article
Engineering, Environmental
Xin Yu, Jielin Huang, Jingjing Zhao, Shuaifei Liu, Dandan Xiang, Yanting Tang, Juan Li, Quanhui Guo, Xinqi Ma, Junwei Zhao
Summary: Efficient visible light photocatalytic elimination of pharmaceutical factory wastewater was achieved by introducing hybrid Ag/AgCl nanoparticles into Ti3+ self-doped TiO2 mesocrystals. The Ag/AgCl@Ti3+-TiO2 mesocrystals showed superior performance in degrading tetracycline under visible light, mainly attributed to the continuous attacks of photo-generated holes and radicals on tetracycline molecules.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Mikhail Lyulyukin, Tikhon Filippov, Svetlana Cherepanova, Maria Solovyeva, Igor Prosvirin, Andrey Bukhtiyarov, Denis Kozlov, Dmitry Selishchev
Summary: This study confirms that solid uranium oxycompounds and uranyl-grafted materials on nanocrystalline anatase TiO2 exhibit higher photocatalytic activity under visible light, with a significantly higher reaction efficiency compared to commercial photocatalysts.
Article
Chemistry, Physical
Hongfei Shi, Tingting Zhao, Jiabo Wang, Yueting Wang, Zhe Chen, Baolei Liu, Haifeng Ji, Weidong Wang, Guanglei Zhang, Yangguang Li
Summary: A new g-C3N4/PW12/TiO2 composite photocatalyst was fabricated through electrospinning/calcination technique and thermal polymerization method, showing remarkable and stable photocatalytic performance under visible light irradiation. The enhanced performance can be attributed to enhanced adsorption in visible-light region, high specific surface area, and effective separation and transfer of photoinduced charge carriers.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Martha Pylarinou, Alexia Toumazatou, Elias Sakellis, Evangelia Xenogiannopoulou, Spiros Gardelis, Nikos Boukos, Athanasios Dimoulas, Vlassis Likodimos
Summary: Surface deposition of FeOx nanoclusters on TiO2 photonic crystals was investigated to explore the interplay of slow-photon amplification, visible light absorption, and charge separation in FeOx-TiO2 photocatalytic films. The study found that low amounts of FeOx nanoclusters improved photocatalytic performance under visible light, but higher loading resulted in performance deterioration, particularly under UV-Vis light.
Article
Engineering, Environmental
Qianqian Hu, Yifan Liu, Weian Li, Yanqi Wang, Wenhua Liao, Hanxun Zou, Jianrong Li, Xiaoying Huang
Summary: This study presents a facile and environmentally friendly method for synthesizing C, N co-doped mesoporous TiO2 nanocrystals, using IL-assisted microwave synthesis, resulting in small-sized TiO2 with well-developed mesoporous structure and abundant C, N dopants. The material exhibits high specific-surface area, excellent hydrophilicity, elevated valence-band edges, abundant defect levels, and narrowed band-gap, leading to improved visible-light absorption, reduced photogenerated electron-hole recombination, and rapid charge transfer and surface-catalyzed reactions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Zhen Xie, Bingxian Chu, Mingkun Wu, Yumin Zhou, Guotong Yi, Bin Li, Xuetang Xu, Lihui Dong, Zhengjun Chen
Summary: In this study, Sn-doped titanium dioxide was synthesized by sol-hydrothermal method, and Cu2O and Cu were deposited on its surface by photochemical reduction method to prepare a composite photocatalyst Cu2O/Cu/T60S1. The introduction of Cu2O and Cu significantly improved the photocatalytic activity of T60S1 in the degradation of organic pesticides and TC-HCl under visible light.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Amit Kumar Verma, Prerna Tripathi, Akash Dubey, Niraj Kumar Vishwakarma, A. S. K. Sinha, Shikha Singh
Summary: This article describes a study on hydrogen generation from aqueous methanol over a TiO2 up-conversion (CeF3:Ho3+) nanosystem (CHT) under visible light irradiance. CeF3:Ho3+ nanoparticles (about 4 to 8 nm) were synthesized and incorporated into TiO2 using a simple polyol reduction method. The successful formation of a CeF3:Ho3+-incorporated TiO2 nanosystem was confirmed through various characterizations. The results showed that the CeF3:Ho3+-incorporated TiO2 nanosystem exhibited enhanced photocatalytic activity and could be used as an effective photocatalyst for sustainable hydrogen generation under visible light irradiance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Siew Yee Lim, Carina Hedrich, Lin Jiang, Cheryl Suwen Law, Manohar Chirumamilla, Andrew D. Abell, Robert H. Blick, Robert Zierold, Abel Santos
Summary: Spectrally tunable nanoporous anodic alumina distributed Bragg reflectors (NAA-DBRs) modified with titanium dioxide (TiO2) coatings were used as optoelectronic platforms to utilize slow light for photocatalysis. The performance of the photocatalysts is influenced by the spectral position of the photonic stop band (PSB) and thickness of the semiconductor, with optimal performance achieved when the red edge of the PSB is close to the red or blue boundary of the absorbance band of methylene blue (MB).
Article
Chemistry, Multidisciplinary
Yasuhiro Shiraishi, Masaki Hashimoto, Kiyomichi Chishiro, Kenta Moriyama, Shunsuke Tanaka, Takayuki Hirai
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
Article
Materials Science, Multidisciplinary
Pundita Ukkakimapan, Vichuda Sattayarut, Thanthamrong Wanchaem, Visittapong Yordsri, Mayuree Phonyiem, Satoshi Ichikawa, Michiko Obata, Masatsugu Fujishige, Kenji Takeuchi, Winadda Wongwiriyapan, Morinobu Endo
DIAMOND AND RELATED MATERIALS
(2020)
Article
Environmental Sciences
Nur Syahidah Afandi, Maedeh Mohammadi, Satoshi Ichikawa, Abdul Rahman Mohamed
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Multidisciplinary Sciences
Yasuhiro Shiraishi, Yuki Ueda, Airu Soramoto, Satoshi Hinokuma, Takayuki Hirai
NATURE COMMUNICATIONS
(2020)
Article
Chemistry, Analytical
Yasuhiro Shiraishi, Rikako Nakatani, Shunsuke Takagi, Chiharu Yamada, Takayuki Hirai
Article
Chemistry, Physical
Yasuhiro Shiraishi, Chiharu Yamada, Shunsuke Takagi, Takayuki Hirai
Summary: A new naphthalimide-dicyanoisophorone conjugate has been synthesized for the detection of hypochlorous acid and hypochlorite, showing selective fluorescence enhancement and color fading. This chemodosimeter allows for rapid, selective, and sensitive detection of HClO/OCl- at concentrations as low as 1.3 μM under physiological conditions.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Yasuhiro Shiraishi, Masako Matsumoto, Satoshi Ichikawa, Shunsuke Tanaka, Takayuki Hirai
Summary: The study reports that RF resin powders doped with P3HT exhibit enhanced photocatalytic activities, leading to increased efficiency in H2O2 generation through enhanced charge separation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Yasuhiro Shiraishi, Shunsuke Takagi, Keiichiro Yomo, Takayuki Hirai
Summary: The study presents a new spiropyran dye that exhibits solvent-driven isomerization even with a hydroxynaphthalene moiety, demonstrating spontaneous isomerization in polar media. The strong stabilization of the MC forms by water molecules due to hydrogen bonding interactions triggers the spontaneous isomerization reaction between SP and MC forms.
Article
Chemistry, Physical
Yasuhiro Shiraishi, Airu Soramoto, Satoshi Ichikawa, Shunsuke Tanaka, Takayuki Hirai
Summary: This study reports a visible light-irradiated Nafion-coated graphene quantum dots/carbon nitride photocatalyst that promotes the splitting of H2O2, resulting in the generation of H2. The Nafion layer on the catalyst surface acts as an impermeable membrane for H2O2 but allows the permeation of H+, facilitating the reduction of H+ and suppressing the reduction of H2O2.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Physical
Yasuhiro Shiraishi, Kanako Miura, Masahiro Jio, Shunsuke Tanaka, Satoshi Ichikawa, Takayuki Hirai
Summary: Researchers have developed a new resin with phenol, which can stably generate H2O2 under sunlight and exhibits enhanced photocatalytic activity. The improved resin shows increased electron conductivity and stronger donor-acceptor π-stacking.
Article
Chemistry, Multidisciplinary
Yasuhiro Shiraishi, Takumi Hagi, Masako Matsumoto, Shunsuke Tanaka, Satoshi Ichikawa, Takayuki Hirai
COMMUNICATIONS CHEMISTRY
(2020)
Article
Nanoscience & Nanotechnology
Yasuhiro Shiraishi, Shota Toi, Satoshi Ichikawa, Takayuki Hirai
ACS APPLIED NANO MATERIALS
(2020)
