Article
Chemistry, Physical
Songwei Hu, Jinwen Shi, Bing Luo, Chaoqian Ai, Dengwei Jing
Summary: A Cu2O-rGO/TiO2 catalyst was synthesized to utilize full spectrum solar light efficiently for hydrogen evolution through an innovative approach. The photothermal synergetic effect enhanced the separation of photo-generated electron-hole pairs and accelerated reaction rates on the catalyst surface.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Christian Iffelsberger, Siowwoon Ng, Martin Pumera
Summary: Photoelectrochemistry, combining the advantages of electrochemical and photochemical processes, is a key area for sustainable prosperity. The study shows that the activity and selectivity of TiO2 photoelectrocatalyst are highly localized and illumination dramatically changes the selectivity in electrolysis reactions. This implies that light can be used to control the selectivity, greatly impacting the optimization of photoelectrocatalysts.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
C. Ashina, N. Pugazhenthiran, P. Sathishkumar, M. Selvaraj, Mohammed A. Assiri, Chandrasekaran Rajasekaran, M. A. Gracia-Pinilla, R. V. Mangalaraja
Summary: In this study, Ni@NiFe2O4/TiO2 magnetic nanocomposites were prepared via a simple sonochemical route, and they showed excellent photocatalytic activity and activation of peroxymonosulphate under direct solar light irradiation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Ziyi Zhang, Zhangyi Xiong, Chuanchuan Zhao, Peijing Guo, Haijun Wang, Yongjun Gao
Summary: A carbon-coated TiO2 photocatalyst was successfully synthesized using a hydrolysis-carbonization strategy, with boric acid acting as a template to maintain particle size and butyl alcohol carbonized to enhance photocatalytic activity. The catalyst showed excellent hydrogen evolution ability and stability under Xenon lamp irradiation, with a band gap of 2.82 eV enabling hydrogen evolution under visible light. The presence of carbon on TiO2 reduced the band gap and improved photocatalytic activity for H2 evolution.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Thomas Dursap, Mariam Fadel, Philippe Regreny, Cristina Tapia Garcia, Celine Chevalier, Hai Son Nguyen, Emmanuel Drouard, Solene Brottet, Michel Gendry, Alexandru Danescu, Matthieu Koepf, Vincent Artero, Matthieu Bugnet, Jose Penuelas
Summary: Photoelectrochemical cells (PEC) are attractive devices for renewable energy production. Nanostructuring of III-V semiconductors can improve device efficiency and reduce material usage. III-V nanowire-based photoelectrodes demonstrate excellent light trapping, charge separation, and collection abilities. However, corrosion in aqueous electrolytes is a challenge for III-V semiconductors. In this study, GaAs nanowires protected with thin TiO2 shells were investigated for their photoelectrochemical performances and structural degradation. The aspect ratio and doping pattern of the nanowires were found to strongly influence the photocatalytic performances.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Ekaterina A. Kozlova, Anna Yu Kurenkova, Evgeny Yu Gerasimov, Nikolay Gromov, Tatiana B. Medvedeva, Andrey A. Saraev, Vasily V. Kaichev
Summary: Pt/TiO2 and CuOx/TiO2 were synthesized and tested in the photoreforming of glycerol. Pt/TiO2 showed higher activity and stability, while CuOx/TiO2 produced a wider variety of products and a higher percentage of organic products from glycerol. Highest hydrogen evolution rates were 0.55 mmol h(-1) g(-1) for CuOx/TiO2 and 1.35 mmol h(-1) g(-1) for Pt/TiO2.
Article
Chemistry, Physical
Moritz Eder, Carla Courtois, Philip Petzoldt, Sonia Mackewicz, Martin Tschurl, Ueli Heiz
Summary: In the past decade, photocatalytic hydrogen evolution from metal-loaded TiO2 has received significant attention. This study compares size-selected Ni and Pt clusters as co-catalysts on a TiO2(110) single crystal and investigates the size- and coverage-dependent effects on the catalyst performance. Larger clusters and higher coverages of Ni enhance the product formation rate, while Pt co-catalysts exhibit a stable and higher activity, but size-specific effects need to be considered.
Article
Chemistry, Physical
Moritz Eder, Carla Courtois, Philip Petzoldt, Sonia Mackewicz, Martin Tschurl, Ueli Heiz
Summary: In the past decade, research on photocatalytic hydrogen evolution from alcohol oxidation on metal-loaded TiO2 has gained attention. This study compares size-selected Ni and Pt clusters as co-catalysts on a TiO2(110) single crystal and explores the size and coverage effects on the catalyst performance during photocatalytic hydrogen evolution.
Article
Green & Sustainable Science & Technology
T. T. Wang, S. C. Lim, C. L. Chiang, Y. J. Shen, P. Raghunath, J. R. Li, Y. G. Lin, M. C. Lin
Summary: A composite photoelectrode B-nGO/H:(NiO/TiO2) NTs with a unique heterostructure nanotube arrays was synthesized. The p-n junction created between p-type NiO and n-type TiO2 facilitates the electron-hole pair separation and interfacial electron transfer. The introduction of boron-doped reduced nanographene oxide nanoparticles (B-nGO NPs) and hydrogenation treatment further optimize the electron-hole separation and enhance the electron transfer. The as-synthesized B-nGO/H:(NiO/TiO2) NTs exhibit a high photocurrent density and an effective photoconversion efficiency under simulated sunlight irradiation.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Chemistry, Applied
Maria A. Esteves, Fernando Fresno, Vitor R. Fernandes, Freddy E. Oropeza, Victor A. de la Pena O'Shea, C. M. Rangel
Summary: The study investigates the production of hydrogen by photocatalysis using TiO2-based photocatalysts, exhibiting excellent performance in both liquid and gas phases, with rGO enhancing the effect of Pt. Factors such as ethanol concentration, graphene oxide, Pt content, and solution pH have a certain impact on hydrogen generation.
Article
Chemistry, Physical
Shuang Li, Yun Hau Ng, Ruixue Zhu, Sijie Lv, Chunxiao Wu, Yuxi Liu, Lin Jing, Jiguang Deng, Hongxing Dai
Summary: In this study, a red phosphorus (RP)/TiO2 composite system was constructed via a chemical vapor deposition strategy, leading to a significantly enhanced visible-light-driven photocatalytic H2 generation rate. The tight interior surface bonding between RP and TiO2 greatly promoted efficient charge transfer and redistribution, extending the lifetimes of active charges during the photocatalytic process.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Ping Wang, Pinsi Deng, Yanjie Cao
Summary: Graphene-modified photocatalytic system plays a crucial role in promoting the H-2 evolution reaction efficiency, thanks to the synergistic action of graphene as a photoelectron cocatalyst and sulfonate ions as active H+-adsorbed sites.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Environmental Sciences
Mohammad Hossein Sayadi, Shahin Homaeigohar, Ayoob Rezaei, Hossein Shekari
Summary: A TiO2/graphene (G) heterostructure doped with Bi and SnO2 nanoparticles was synthesized and used for photocatalytic degradation of pentachlorophenol (PCP) under visible light irradiation. The nanocomposite showed promising photodegradation efficiency due to the generation of active radicals. Optimizing parameters such as pH, catalyst dosage, and PCP concentration improved the photocatalytic activity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Marshet G. Sendeku, Fengmei Wang, Zhongzhou Cheng, Peng Yu, Ning Gao, Xueying Zhan, Zhenxing Wang, Jun He
Summary: Layered van der Waals metal phosphorus trichalcogenides have been widely explored for their potential in energy conversion and electronics. This study successfully synthesized 2D nonlayered tin thiohypodiphosphate nanosheets with promising photocatalytic water splitting activity. The ulatrathin Sn2P2S6 catalyst shows auspicious performance and stability, making it a significant advancement in the search for new materials for future energy conversion.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Chemical
Zhi-Hao Zhang, Yu-Jen Shih
Summary: FeOxrGO/Ti photoanodes were synthesized by decorating TiO2 nanotube array (TiNTA) with waste iron oxide and reduced graphene oxide (rGO) via wet impregnation and calcination. The photoelectrocatalytic (PEC) degradation of azo dye pollutants and hydrogen gas evolution were demonstrated. Characterization revealed that the iron oxide recovered from the wastewater treatment plant consisted of mineral goethite nanoparticles with a visible-light responsive bandgap. The incorporation of rGO enhanced the electrochemical surface area (ECSA) of the anode, facilitating charge carrier transport within the α-FeOOH and TiO2 heterostructure.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
