scholarly journals Photogenerated Charge Separation and Photocatalytic Hydrogen Production of TiO2/Graphene Composite Materials

2019 ◽  
Vol 77 (6) ◽  
pp. 520 ◽  
Author(s):  
Yu Guo ◽  
Yanrui Li ◽  
Chengming Wang ◽  
Ran Long ◽  
Yujie Xiong
Keyword(s):  
Composite Materials ◽  
Hydrogen Production ◽  
Charge Separation ◽  
Photocatalytic Hydrogen Production ◽  
Graphene Composite ◽  
Photogenerated Charge Separation

Efficient photocatalytic hydrogen production by Mn0.05Cd0.95S nanoparticles anchored on cubic NiSe2

2020 ◽  
Vol 44 (35) ◽  
pp. 14879-14889
Author(s):  
Hua Liu ◽  
Teng Yan ◽  
Zhiliang Jin ◽  
Qingxiang Ma
Keyword(s):  
Hydrogen Production ◽  
Surface Activity ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Catalyst Activity ◽  
Critical Factors ◽  
Photocatalytic Hydrogen Production ◽  
Charge Separation Efficiency

In the field of catalysis, three critical factors for evaluating catalyst activity include charge separation efficiency, photoabsorption, and surface activity sites.

Controllable local electronic migration induced charge separation and red-shift emission in carbon nitride for enhanced photocatalysis and potential phototherapy

2019 ◽  
Vol 55 (43) ◽  
pp. 6002-6005 ◽  
Author(s):  
Zongzhao Sun ◽  
Yabin Jiang ◽  
Lei Zeng ◽  
Xi Zhang ◽  
Shuchao Hu ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Charge Separation ◽  
Carbon Nitride ◽  
Cell Membranes ◽  
Red Shift ◽  
Photocatalytic Hydrogen Production ◽  
Induced Charge ◽  
Carbon Nitride Materials

Controllable local electronic migration induced charge separation and red-shift emission endow carbon nitride materials with enhanced photocatalytic hydrogen production and potential phototherapy by labeling cell membranes.

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.

TiO2 /WO3 /Au/MWCNT composite materials for photocatalytic hydrogen production: Advantages and draw-backs

2012 ◽  
Vol 249 (12) ◽  
pp. 2592-2595 ◽  
Author(s):  
Zsolt Pap ◽  
Éva Karácsonyi ◽  
Lucian Baia ◽  
Lucian Cristian Pop ◽  
Virginia Danciu ◽  
...  
Keyword(s):  
Composite Materials ◽  
Hydrogen Production ◽  
Photocatalytic Hydrogen Production

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.

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.

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