Development of Visible-Light-Driven TiO2 and SrTiO3 Photocatalysts Doped with Metal Cations for H2 or O2 Evolution

2010 ◽  
Vol 162 ◽  
pp. 29-40 ◽  
Author(s):  
Ryo Niishiro ◽  
Akihiko Kudo
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Nitrate Solution ◽  
Silver Nitrate Solution ◽  
Light Irradiation ◽  
O2 Evolution ◽  
H2 Evolution ◽  
Electron Mediator ◽  
Reversible Redox ◽  
Visible Light Driven

This review paper represents photocatalytic properties of metal cation-doped TiO2 (rutile) and SrTiO3 photocatalysts for O2 evolution from an aqueous silver nitrate solution and H2 evolution from an aqueous methanol solution under visible light irradiation. Photocatalytic activities for the O2 evolution of Cr/Sb and Rh/Sb-codoped TiO2 are strongly dependent on the codoping ratio and the amount of doped chromium and rhodium. The codopant controls the oxidation number of doped chromium and rhodium. Rh-doped SrTiO3 in which the doped Rh species possesses a reversible redox property is active for the H2 evolution reaction under visible light irradiation. Overall water splitting under visible light irradiation proceeds with Z-scheme photocatalyst systems consisting of the Rh-doped SrTiO3 as a H2 evolution photocatalyst combined with BiVO4 as an O2 evolution photocatalyst and an Fe3+/Fe2+ electron mediator.

scholarly journals Effective Photocatalytic Hydrogen Evolution Using Covalent Triazine Framework-Derived Carbon Nitride Nanofiber Containing Carbon Vacancies for Visible-Light-Driven

2021 ◽  
Vol 11 (16) ◽  
pp. 7222
Author(s):  
Liangjing Zhang ◽  
Aiwu Wang ◽  
Mei Zhang ◽  
Zhengyuan Jin ◽  
Huan Yi ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Active Sites ◽  
Carbon Nitride ◽  
Light Irradiation ◽  
H2 Evolution ◽  
Photoexcited Electron ◽  
Energy And Environment ◽  
Visible Light Driven ◽  
Covalent Triazine Framework

In this study, a novel fibrous carbon nitride (FCN) was prepared from laminated covalent triazine framework (CTF) via pyrolysis, using functionalized 2,5-thiophenedicarboxylic acid and melamine as the precursors. A carbon vacancy was produced by two-step calcination in argon and air atmospheres. These carbon vacancies further exposed the edges and diffusion channels of the FCN nanofibers, which accelerated photogenerated charge transfer and provided more active sites. The FCN was characterized using various techniques and used for H2 evolution under visible-light irradiation. The as-synthesized FCN exhibited excellent stability, and its photocatalytic activity for H2 evolution under visible-light irradiation was 66 times higher than that of bare C3N4 (BCN), attaining a maximum H2 evolution rate of 102.63 μmol in 6 h. The FCN remained stable following visible-light irradiation at the end of 10 cycles. The FCN benefited from the absorption of solar energy and a large number of active sites. These advantages facilitated the efficient separation of photoexcited electron-hole pairs to hinder charge recombination. This work generates new insights into the preparation of highly effective FCN photocatalysts that may be put to various applications, especially in the fields of energy and environment.

Visible-light-driven photocatalytic water oxidation catalysed by iron-based metal–organic frameworks

2016 ◽  
Vol 52 (29) ◽  
pp. 5190-5193 ◽  
Author(s):  
Yu Horiuchi ◽  
Takashi Toyao ◽  
Kenta Miyahara ◽  
Lionet Zakary ◽  
Dang Do Van ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Water Oxidation ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Nitrate Solution ◽  
Silver Nitrate Solution ◽  
Visible Light Driven ◽  
Metal Organic ◽  
Iron Based

An iron-based metal–organic framework, MIL-101(Fe), promotes photocatalytic water oxidation to produce oxygen from aqueous silver nitrate solution under visible-light irradiation.

scholarly journals Microwave-Assisted Hydrothermal Synthesis of SrTiO3:Rh for Photocatalytic Z-scheme Overall Water Splitting

2018 ◽  
Vol 9 (1) ◽  
pp. 55 ◽  
Author(s):  
Hsin-yu Lin ◽  
Lyu-Ting Cian
Keyword(s):  
Hydrothermal Synthesis ◽  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Evolution Rate ◽  
Nanoporous Structure ◽  
O2 Evolution ◽  
H2 Evolution ◽  
Microwave Assisted

Developing a photocatalyst system for solar energy conversion to electric energy or chemical energy is a topic of great interest for fundamental and practical importance. In this study, hydrogen production by a new Z-scheme photocatalysis water-splitting system was examined over Rh-doped SrTiO3 (denoted as Rh:SrTiO3) with Ru nanoparticle as cocatalyst for H2 evolution and BiVO4 photocatalyst for O2 evolution under visible light irradiation, where Co(bpy)32+/3+ was used as electron mediator. The catalysts were characterized by powder X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), and Ultraviolet–visible spectroscopy. We present a fast and efficient method to synthesize Rh-doped SrTiO3 photocatalyst via microwave-assisted hydrothermal method. Our results showed a significant effect of Ti precursor on morphology of Rh:SrTiO3 prepared by microwave-assisted hydrothermal synthesis. The Ru/Rh:SrTiO3 prepared by TiCl4 precursor showed a nanoporous structure and high photocatalytic activity. The combination of Ru/Rh:SrTiO3 with BiVO4 achieves a high H2 evolution rate (317 μmoL g−1 h−1) and O2 evolution rate (168 μmol g−1 h−1) in 0.5 mM Co(bpy)32+/3+ solution under visible light irradiation.

Continuous solid solutions of Na0.5La0.5TiO3–LaCrO3 for photocatalytic H2 evolution under visible-light irradiation

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 51801-51806 ◽  
Author(s):  
Jinwen Shi ◽  
Shichao Zong ◽  
Yuchao Hu ◽  
Xiangjiu Guan ◽  
Jiaying Luo ◽  
...  
Keyword(s):  
Visible Light ◽  
Solid Solutions ◽  
Visible Light Irradiation ◽  
Lattice Distortion ◽  
Light Irradiation ◽  
H2 Evolution ◽  
Photocatalytic Activities ◽  
Visible Light Driven ◽  
Photocatalytic H2 Evolution

(Na0.5La0.5TiO3)1−x(LaCrO3)x solid solutions showed enhanced visible-light-driven photocatalytic activities for H2 evolution due to the narrowed bandgaps and increased lattice distortion.

Co3(OH)2(HPO4)2 as a novel photocatalyst for O2 evolution under visible-light irradiation

2016 ◽  
Vol 6 (22) ◽  
pp. 8080-8088 ◽  
Author(s):  
Yazhou Zhang ◽  
Jinwen Shi ◽  
Yuchao Hu ◽  
Zhenxiong Huang ◽  
Liejin Guo
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
O2 Evolution ◽  
Visible Light Driven

Co3(OH)2(HPO4)2 was proved to be a novel visible-light-driven photocatalyst for O2 evolution due to the unique characteristics of Co2+ octahedra.

Visible light-driven novel g-C3N4/NiFe-LDH composite photocatalyst with enhanced photocatalytic activity towards water oxidation and reduction reaction

2015 ◽  
Vol 3 (36) ◽  
pp. 18622-18635 ◽  
Author(s):  
Susanginee Nayak ◽  
Lagnamayee Mohapatra ◽  
Kulamani Parida
Keyword(s):  
Photocatalytic Activity ◽  
Composite Materials ◽  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Water Oxidation ◽  
Reduction Reaction ◽  
Light Irradiation ◽  
Composite Photocatalyst ◽  
Visible Light Driven

Dispersion of exfoliated CN over the surface of exfoliated LDH composite materials, and its photocatalytic water splitting under visible-light irradiation.

Solvothermal synthesis and visible light-driven photocatalytic degradation for tetracycline of Fe-doped SrTiO3

RSC Advances ◽  
2014 ◽  
Vol 4 (88) ◽  
pp. 47615-47624 ◽  
Author(s):  
Ping Li ◽  
Chunbo Liu ◽  
Guoling Wu ◽  
Yang Heng ◽  
Shuang Lin ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Light Irradiation ◽  
Photocatalytic Activities ◽  
Visible Light Driven ◽  
Facile Solvothermal Method

In this paper, Fe-doped SrTiO3 (FSTO) photocatalysts were successfully prepared via a facile solvothermal method, and their photocatalytic activities for degrading tetracycline (TC) under visible light irradiation were examined.

Dehydrogenative 6π Heterocyclization under Visible Light Irradiation and Mechanistic Insights

2021 ◽  
Author(s):  
Zhao Zhang ◽  
Haohua Chen ◽  
Niklas Keller ◽  
Qin Xiong ◽  
Lei Liu ◽  
...  
Keyword(s):  
Transition Metals ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Reaction Proceeds ◽  
Visible Light Driven

A visible-light-driven oxidative 6π heterocycilization for the synthesis of structurally diverse π-conjugated polycyclic 1-aminoisoquinolines has been developed. The reaction proceeds under visible-light or sunshine, obviates photocatalyst and transition-metals, and features...

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