Effective orientation control of photogenerated carrier separation via rational design of a Ti3C2(TiO2)@CdS/MoS2 photocatalytic system

2019 ◽  
Vol 242 ◽  
pp. 202-208 ◽  
Author(s):  
Zizheng Ai ◽  
Yongliang Shao ◽  
Bin Chang ◽  
Baibiao Huang ◽  
Yongzhong Wu ◽  
...  
Keyword(s):  
Rational Design ◽  
Photogenerated Carrier ◽  
Orientation Control ◽  
Photocatalytic System ◽  
Carrier Separation

Recent Advances in the Fabrication of All-Solid-State Nanostructured TiO2-Based Z-scheme Heterojunctions for Environmental Remediation

2020 ◽  
Vol 20 (9) ◽  
pp. 5861-5873 ◽  
Author(s):  
Meiqi Du ◽  
Shengxin Cao ◽  
Xiaozhou Ye ◽  
Jianfeng Ye
Keyword(s):  
Solid State ◽  
Charge Carrier ◽  
Environmental Remediation ◽  
Rational Design ◽  
High Efficiency ◽  
Photogenerated Charge Carrier ◽  
Advantages And Disadvantages ◽  
Recent Advances ◽  
Photocatalytic System ◽  
Carrier Separation

Nanostructured TiO2-based Z-scheme heterojunctions have been widely accepted to be among the most effective photocatalysts for environmental remediation owing to their broadened light absorbance, high efficiency of photogenerated charge carrier separation, and well-preserved strong oxidation and reduction capability. In this review, we will first introduce the photogenerated charge carrier transportation mechanism of three different types of Z-scheme heterojunction systems, namely, liquid-phase Z-scheme photocatalytic system, all-solid-state indirect Z-scheme photocatalytic system, and all-solid-state direct Z-scheme photocatalytic system. Subsequently, we will describe the recent advances toward the rational design and fabrication of all-solid-state nanostructured TiO2-based Z-scheme heterojunctions. The applications of the thus-constructed all-solid-state nanostructured TiO2-based Z-scheme heterojunctions in the degradation of volatile organic compounds, removal of waste water organic pollutants, and upgradation of greenhouse gas CO2 will then be presented one by one. Finally, the advantages and disadvantages of all-solid-state nanostructured TiO2-based Z-scheme heterojunction for photocatalytic environmental remediation will be briefly discussed, and the direction of future development will be prospected as well.

Photogenerated-carrier separation along edge dislocation of WO3single-crystal nanoflower photoanode

2018 ◽  
Vol 6 (18) ◽  
pp. 8604-8611 ◽  
Author(s):  
Yuyu Bu ◽  
Jun Ren ◽  
Huawei Zhang ◽  
Dongjiang Yang ◽  
Zhuoyuan Chen ◽  
...  
Keyword(s):  
Edge Dislocation ◽  
Separation Efficiency ◽  
Photogenerated Carrier ◽  
Crystal Face ◽  
Carrier Separation

Edge dislocation on WO3nanosheet can induce a crystal face heterojunction system to promote the separation efficiency of photogenerated carrier.

Theoretical Explanation of the Photogenerated Carrier Separation at the Surface Junction

ChemCatChem ◽  
2017 ◽  
Vol 9 (23) ◽  
pp. 4340-4344 ◽  
Author(s):  
Weiyu Song ◽  
Sicong Ma ◽  
Lu Wang ◽  
Jian Liu ◽  
Zhen Zhao
Keyword(s):  
Theoretical Explanation ◽  
Photogenerated Carrier ◽  
Carrier Separation

scholarly journals Ag as Cocatalyst and Electron-Hole Medium in CeO2 QDs/Ag/Ag2Se Z-scheme Heterojunction Enhanced the Photo-Electrocatalytic Properties of the Photoelectrode

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 253 ◽  
Author(s):  
Lingwei Li ◽  
Hange Feng ◽  
Xiaofan Wei ◽  
Kun Jiang ◽  
Shaolin Xue ◽  
...  
Keyword(s):  
High Speed ◽  
Oxygen Vacancies ◽  
Photocatalytic Performance ◽  
Interfacial Region ◽  
Photogenerated Carrier ◽  
Electron Hole ◽  
Carrier Recombination ◽  
Photocatalytic System ◽  
Nano Channel ◽  
Active Substances

A recyclable photoelectrode with high degradation capability for organic pollutants is crucial for environmental protection and, in this work, a novel CeO2 quantum dot (QDs)/Ag2Se Z-scheme photoelectrode boasting increased visible light absorption and fast separation and transfer of photo-induced carriers is prepared and demonstrated. A higher voltage increases the photocurrent and 95.8% of tetracycline (TC) is degraded by 10% CeO2 QDs/Ag2Se in 75 minutes. The degradation rate is superior to that achieved by photocatalysis (92.3% of TC in 90 min) or electrocatalysis (27.7% of TC in 90 min). Oxygen vacancies on the CeO2 QDs advance the separation and transfer of photogenerated carriers at the interfacial region. Free radical capture tests demonstrate that •O2−, •OH, and h+ are the principal active substances and, by also considering the bandgaps of CeO2 QDs and Ag2Se, the photocatalytic mechanism of CeO2 QDs/Ag2Se abides by the Z-scheme rather than the traditional heterojunction scheme. A small amount of metallic Ag formed in the photocatalysis process can form a high-speed charge transfer nano channel, which can greatly inhibit the photogenerated carrier recombination, improve the photocatalytic performance, and help form a steady Z-scheme photocatalysis system. This study would lay a foundation for the design of a Z-scheme solar photocatalytic system.

The effect of directed photogenerated carrier separation on photocatalytic hydrogen production

Nano Energy ◽  
2017 ◽  
Vol 41 ◽  
pp. 488-493 ◽  
Author(s):  
Yuelei Si ◽  
Shuang Cao ◽  
Zhijiao Wu ◽  
Yinglu Ji ◽  
Yang Mi ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Photogenerated Carrier ◽  
Photocatalytic Hydrogen Production ◽  
Carrier Separation

Designed Ag-decorated Mn:ZnO nanocomposite: facile synthesis, and enhanced visible light absorption and photogenerated carrier separation

2020 ◽  
Vol 22 (46) ◽  
pp. 27272-27279
Author(s):  
Jing Li ◽  
Huan Yuan ◽  
Qiuping Zhang ◽  
Kaiyi Luo ◽  
Yutong Liu ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Polymer Network ◽  
Photogenerated Carrier ◽  
Facile Synthesis ◽  
Visible Light Absorption ◽  
Complex Architectures ◽  
Doped Zno ◽  
Carrier Separation ◽  
Mn Doped

A series of ZnO-based complex architectures including Mn-doped ZnO, Ag/ZnO and Ag-decorated Mn:ZnO nanocomposites were fabricated by a facile polymer network gel method.

Advancing photoreforming of organics: highlights on photocatalyst and system designs for selective oxidation reactions

2021 ◽  
Author(s):  
Cui Ying Toe ◽  
Constantine Tsounis ◽  
Jiajun Zhang ◽  
Hassan Masood ◽  
Denny Gunawan ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Rational Design ◽  
Recent Literature ◽  
Oxidation Reactions ◽  
Photocatalytic System ◽  
System Designs ◽  
Selective Oxidation Reactions

This review appraises recent literature and provides guidelines for the rational design of photocatalytic system for selective photoreforming reaction.

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