Photogenerated electron reservoir in hetero-p–n CuO–ZnO nanocomposite device for visible-light-driven photocatalytic reduction of aqueous Cr(vi)

2015 ◽  
Vol 3 (3) ◽  
pp. 1199-1207 ◽  
Author(s):  
Jianyu Yu ◽  
Shendong Zhuang ◽  
Xiaoyong Xu ◽  
Wenchang Zhu ◽  
Bing Feng ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrothermal Reaction ◽  
Photogenerated Electron ◽  
Photocatalytic Reduction ◽  
Visible Light Driven ◽  
Cu Foil ◽  
Visible Light Photocatalytic

A 3D CuO–ZnO p–n junction hierarchical device was fabricated via sequential in situ crystallization and hydrothermal reaction on Cu foil and exhibited enhanced visible light photocatalytic reduction with stable recyclability to Cr(vi).

scholarly journals The synthesis of a BiOClxBr1−x nanostructure photocatalyst with high surface area for the enhanced visible-light photocatalytic reduction of Cr(vi)

RSC Advances ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 4763-4771 ◽  
Author(s):  
Muhammad Bilal Hussain ◽  
Malik Saddam Khan ◽  
Herman Maloko Loussala ◽  
Muhammad Sohail Bashir
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
Room Temperature ◽  
High Surface ◽  
High Surface Area ◽  
Photocatalytic Reduction ◽  
Synthetic Process ◽  
Visible Light Photocatalytic

Cr(vi) reduction is performed by BiOCl0.8Br0.2 composite produced via a facile in situ synthetic process at room temperature while making use of PVP (Mw = 10 000).

scholarly journals A novel visible-light-driven TiO2 photocatalytic reduction for hexavalent chromium wastewater and mechanism

2021 ◽  
Author(s):  
Baoxiu Zhao ◽  
Kaixin Zhang ◽  
Yue Huang ◽  
Qi Wang ◽  
Hao Xu ◽  
...  
Keyword(s):  
Visible Light ◽  
Self Assembly ◽  
Ph Value ◽  
Sol Gel ◽  
Photocatalytic Reduction ◽  
Complex Catalyst ◽  
Acidic Aqueous Solution ◽  
Visible Light Driven ◽  
Key Steps

Abstract TiO2 photocatalyst was prepared with a sol-gel method and its characterizations were analyzed, then TiO2 photocatalytic reduction for Cr6+ was investigated in visible light irradiation and reduction mechanism were deduced lastly. Prepared TiO2 is anatase and bandgap is about 2.95 eV. Experimental results display that almost 100% Cr6+ is removed by visible-light-driven TiO2 photocatalytic reduction after 120 min when Cr2O72− initial concentration is 1.0 mg·L−1, TiO2 dosage is 1.0 g·L−1 and pH value is 3. In acidic aqueous solution, HCrO4− is the dominant existing form of Cr6+ and adsorbed by TiO2, forming a complex catalyst HCrO4−/TiO2 which wavelength enlarges to visible light zone, proved by UV-Vis DRS. Based on XPS data, it can be deduced that Cr6+ is adsorbed on the surface of TiO2 and then reduced to Cr3+in situ by photoelectrons. Self-assembly of HCrO4−/TiO2 complex catalyst and self-reduction of Cr6+in situ are the key steps to start visible-light-driven TiO2 photocatalytic reduction. Furthermore, TiO2 photocatalytic reduction for Cr6+ fits well with pseudo first-order kinetics and has potential application to treat chemical industrial wastewater.

Enhanced visible light photocatalytic activity of a floating photocatalyst based on B–N-codoped TiO2 grafted on expanded perlite

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 41385-41392 ◽  
Author(s):  
Xin Wang ◽  
Wei Wang ◽  
Xuejiang Wang ◽  
Jing Zhang ◽  
Zaoli Gu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Environmental Remediation ◽  
Expanded Perlite ◽  
Visible Light Photocatalytic Activity ◽  
Codoped Tio2 ◽  
Visible Light Driven ◽  
Visible Light Photocatalytic

Floatable photocatalyst for in situ environmental remediation with enhanced visible light driven photocatalytic activity.

In situ construction of the BiOCl/Bi2Ti2O7 heterojunction with enhanced visible-light photocatalytic activity

2019 ◽  
Vol 6 (3) ◽  
pp. 791-798 ◽  
Author(s):  
Siying Niu ◽  
Ruoyu Zhang ◽  
Zhiyu Zhang ◽  
Jiming Zheng ◽  
Yang Jiao ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Photocatalytic Properties ◽  
Visible Light Photocatalytic Activity ◽  
Visible Light Driven ◽  
Comparable Method ◽  
Visible Light Photocatalytic

Herein, a BiOCl/Bi2Ti2O7 heterojunction was prepared as an efficient visible light-driven photocatalyst through an in situ hydrothermal method, and its photocatalytic properties were investigated via a comparable method.

Visible light photocatalytic reduction of Cr(VI) on TiO2 in situ modified with small molecular weight organic acids

2010 ◽  
Vol 95 (3-4) ◽  
pp. 400-407 ◽  
Author(s):  
Nan Wang ◽  
Lihua Zhu ◽  
Kejian Deng ◽  
Yuanbin She ◽  
Yanmin Yu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Organic Acids ◽  
Visible Light ◽  
Photocatalytic Reduction ◽  
Small Molecular Weight ◽  
Visible Light Photocatalytic
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