scholarly journals Prominent roles of Ni(OH)2 deposited on ZnIn2S4 microspheres in efficient charge separation and photocatalytic H2 evolution

RSC Advances ◽  
2021 ◽  
Vol 11 (20) ◽  
pp. 12442-12448
Author(s):  
Zhuang Guo ◽  
Huixia Hou ◽  
Jingyi Zhang ◽  
Pinglong Cai ◽  
Jun Lin
Keyword(s):  
Charge Separation ◽  
H2 Evolution ◽  
Photogenerated Electrons ◽  
Efficient Charge ◽  
Photocatalytic H2 Evolution

The capture of the photogenerated holes by the deposited Ni(OH)2 contributes to the efficient charge separation, allowing more photogenerated electrons to be left on ZnIn2S4 to reduce H+ to H2.

Noble-metal-free CdS/Ni-MOF composites with highly efficient charge separation for photocatalytic H2 evolution

2020 ◽  
Vol 522 ◽  
pp. 146356 ◽  
Author(s):  
Junlan Guo ◽  
Yinghua Liang ◽  
Li Liu ◽  
Jinshan Hu ◽  
Huan Wang ◽  
...  
Keyword(s):  
Noble Metal ◽  
Charge Separation ◽  
H2 Evolution ◽  
Metal Free ◽  
Highly Efficient ◽  
Efficient Charge ◽  
Photocatalytic H2 Evolution

scholarly journals Efficient Charge Migration in Chemically-Bonded Prussian Blue Analogue/CdS with Beaded Structure for Photocatalytic H2 Evolution

JACS Au ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 212-220
Author(s):  
Mi Zhang ◽  
Yifa Chen ◽  
Jia-Nan Chang ◽  
Cheng Jiang ◽  
Wen-Xin Ji ◽  
...  
Keyword(s):  
Prussian Blue ◽  
H2 Evolution ◽  
Charge Migration ◽  
Prussian Blue Analogue ◽  
Efficient Charge ◽  
Photocatalytic H2 Evolution

scholarly journals Hydrothermal Synthesis of rGO/PbTiO3 Photocatalyst and Its Photocatalytic H2 Evolution Activity

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Chunyan Wang ◽  
Lianwei Shan ◽  
Dongyuan Song ◽  
Yanwei Xiao ◽  
Jagadeesh Suriyaprakash
Keyword(s):  
Photocatalytic Performance ◽  
H2 Evolution ◽  
X Ray Diffraction ◽  
Hydrothermal Route ◽  
X Ray ◽  
Transmission Electron ◽  
Reduced Graphene ◽  
Efficient Charge ◽  
One Step ◽  
Photocatalytic H2 Evolution

In this letter, we investigated the photocatalytic activity of the newly formed rGO/PbTiO3 composites, which are synthesized by a one-step hydrothermal route. By adjusting the amount of reduced graphene oxide (rGO) (0, 0.15, 0.30, 0.60, and 1.20 wt%) with the PbTiO3, we constructed various photocatalysts for this investigation. The crystal structure and morphology of the various composites were studied by powder X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). Photoelectron spectroscopic study revealed that the band structure of the newly formed composites and efficient charge separation can be obtained by the interfaces of various rGO content. In addition, the photocatalytic performance of the synthesized composites was explored by H2 evolution and rhodamine blue (RhB) degradation. The obtained results indicated that the addition of the appropriate amount of rGO could improve the activity of pure PbTiO3, significantly.

scholarly journals Pt Deposites on TiO2 for Photocatalytic H2 Evolution: Pt Is Not Only the Cocatalyst, but Also the Defect Repair Agent

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1047 ◽  
Author(s):  
Zhan Shu ◽  
Yandi Cai ◽  
Jiawei Ji ◽  
Changjin Tang ◽  
Shuohan Yu ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Charge Separation ◽  
H2 Production ◽  
H2 Evolution ◽  
X Ray ◽  
Production Activity ◽  
Defect Repair ◽  
New Perspective ◽  
Photocatalytic H2 Evolution

Pt, as a common cocatalyst, has been widely used in photocatalytic H2 evolution. However, the specific role of Pt in photocatalytic H2 evolution has not been thoroughly studied. In this paper, by employing three Pt sources with different charges (positive, negative and neutral), we systematically studied the charge effect of Pt sources on photocatalytic H2 evolution via TiO2 catalyst. According to the results of Raman, X-ray photoelectron spectroscopy (XPS), recycle experiments and photocurrent characterizations, it was found that TiO2 would produce electropositive defects during photocatalytic H2 evolution, inevitably leading to the decline of H2 production activity. Thanks to the electrostatic interaction, the electronegative Pt source not only promoted charge separation, but preferential deposited on electropositive defects, which acted as the defect repair agent, and thus resulted in the increased photocatalytic stability. This work may provide a new perspective for enhancing photocatalytic stability of hydrogen production.

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