Z-scheme photocatalytic hydrogen production over WO3/g-C3N4 composite photocatalysts

RSC Advances ◽  
2014 ◽  
Vol 4 (41) ◽  
pp. 21405-21409 ◽  
Author(s):  
Hideyuki Katsumata ◽  
Yusuke Tachi ◽  
Tohru Suzuki ◽  
Satoshi Kaneco
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Production ◽  
Charge Separation ◽  
Photocatalytic Performance ◽  
Photocatalytic Hydrogen Production ◽  
Composite Photocatalysts ◽  
Efficient Charge

WO3/g-C3N4 catalysts exhibit excellent photocatalytic performance for H2 production from aqueous solution through the Z-scheme mechanism, which results in the efficient charge separation.

A new type of carbon nitride-based polymer composite for enhanced photocatalytic hydrogen production

2014 ◽  
Vol 50 (51) ◽  
pp. 6762-6764 ◽  
Author(s):  
Zheng Xing ◽  
Zhigang Chen ◽  
Xu Zong ◽  
Lianzhou Wang
Keyword(s):  
Hydrogen Production ◽  
Conducting Polymer ◽  
Polymer Composite ◽  
Charge Separation ◽  
Carbon Nitride ◽  
Hole Transport ◽  
Transport Pathway ◽  
Photocatalytic Hydrogen Production ◽  
Composite Photocatalysts ◽  
New Type

This communication reports on a new type of composite photocatalysts using a conducting polymer PEDOT as a hole transport pathway for promoting charge separation in photocatalytic hydrogen production.

scholarly journals Roles of cocatalysts in semiconductor-based photocatalytic hydrogen production

2013 ◽  
Vol 371 (1996) ◽  
pp. 20110430 ◽  
Author(s):  
Jinhui Yang ◽  
Hongjian Yan ◽  
Xu Zong ◽  
Fuyu Wen ◽  
Meiying Liu ◽  
...  
Keyword(s):  
Activation Energy ◽  
Composite Material ◽  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Charge Separation ◽  
Reaction Rate ◽  
Photocatalytic Performance ◽  
Photocatalytic Reaction ◽  
Photocatalytic Hydrogen Production ◽  
Reduction And Oxidation

A photocatalyst is defined as a functional composite material with three components: photo-harvester (e.g. semiconductor), reduction cocatalyst (e.g. for hydrogen evolution) and oxidation cocatalyst (e.g. for oxidation evolution from water). Loading cocatalysts on semiconductors is proved to be an effective approach to promote the charge separation and transfer, suppress the charge recombination and enhance the photocatalytic activity. Furthermore, the photocatalytic performance can be significantly improved by loading dual cocatalysts for reduction and oxidation, which could lower the activation energy barriers, respectively, for the two half reactions. A quantum efficiency (QE) as high as 93 per cent at 420 nm for H 2 production has been achieved for Pt–PdS/CdS, where Pt and PdS, respectively, act as reduction and oxidation cocatalysts and CdS as a photo-harvester. The dual cocatalysts work synergistically and enhance the photocatalytic reaction rate, which is determined by the slower one (either reduction or oxidation). This work demonstrates that the cocatalysts, especially the dual cocatalysts for reduction and oxidation, are crucial and even absolutely necessary for achieving high QEs in photocatalytic hydrogen production, as well as in photocatalytic water splitting.

Constructing 2D/2D interfacial contact in ReS2/TiO2 via Ti-S bond for efficient charge transfer in photocatalytic hydrogen production

2021 ◽  
Author(s):  
Yanan Wang ◽  
Rongrong Shi ◽  
Kai Song ◽  
Chunyang Liu ◽  
Fang He
Keyword(s):  
Charge Transfer ◽  
Hydrogen Production ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Photocatalytic Hydrogen Production ◽  
Interfacial Contact ◽  
Efficient Charge ◽  
Transport Path ◽  
Charge Separation Efficiency

Exploring and adjusting the transport path of photo-generated carriers is vital to promote charge separation efficiency and charge transfer ability for photocatalytic hydrogen performance of novel semiconductor composites. Herein, this...

Local Spatial Polarization Induced Efficient Charge Separation of Squaraine‐Linked COF for Enhanced Photocatalytic Performance

2021 ◽  
pp. 2104519
Author(s):  
Haijie Ben ◽  
Gaojie Yan ◽  
Haiyang Liu ◽  
Cancan Ling ◽  
You Fan ◽  
...  
Keyword(s):  
Charge Separation ◽  
Photocatalytic Performance ◽  
Efficient Charge
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