Fructose-regulated ZnO Single-Crystal Nanosheets with Oxygen Vacancies for Photodegradation of High Concentration Pollutants and Photocatalytic Hydrogen Evolution

2021 ◽  
Author(s):  
Xuewen Wang ◽  
Haiping Xu ◽  
Yang Zhang ◽  
Xinfei Ji ◽  
Rongbin Zhang
Keyword(s):  
Single Crystal ◽  
Hydrogen Evolution ◽  
Oxygen Vacancies ◽  
High Concentration ◽  
Photocatalytic Hydrogen Evolution ◽  
Zno Single Crystal

Diffusivity of Hydrogen in ZnO Single Crystal

2012 ◽  
Vol 326-328 ◽  
pp. 459-464 ◽  
Author(s):  
Jakub Čížek ◽  
František Lukáč ◽  
Marián Vlček ◽  
Ivan Procházka ◽  
Franziska Traeger ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Single Crystal ◽  
Hydrogen Diffusion ◽  
Subsurface Layer ◽  
Nuclear Reaction Analysis ◽  
High Concentration ◽  
Resistivity Measurements ◽  
Zno Single Crystal ◽  
Very High

Hydrogen diffusivity in ZnO (0001) single crystal was investigated using electrical resistometry and nuclear reaction analysis (NRA). ZnO crystals were covered with a thin Pd over-layer and electrochemically charged with hydrogen. The net concentration of hydrogen determined by NRA was found to be in a reasonable agreement with the value estimated from the transported charge using the Faradays law. The hydrogen diffusion coefficient in ZnO was estimated from in-situ electrical resistivity measurements. Moreover, NRA investigations revealed existence of a subsurface layer with very high concentration of hydrogen (up to 40 at.%). Typical surface modification observed on hydrogen loaded crystal by light microscope indicates hydrogen-induced plastic deformation realized by a slip in the c-direction. Open-volume defects introduced by hydrogen-induced plastic deformation trap diffusing hydrogen and cause an enhancement of hydrogen concentration in the deformed subsurface layer.

Single crystal titanate–zirconate nanoleaf: Synthesis, growth mechanism and enhanced photocatalytic hydrogen evolution properties

CrystEngComm ◽  
2012 ◽  
Vol 14 (5) ◽  
pp. 1874 ◽  
Author(s):  
Zhonghua Li ◽  
Jun Shen ◽  
Jian-Qiang Wang ◽  
Dongjun Wang ◽  
Yongjiang Huang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Hydrogen Evolution ◽  
Growth Mechanism ◽  
Photocatalytic Hydrogen Evolution

Single-crystal TiO2 nanorods assembly for efficient and stable cocatalyst-free photocatalytic hydrogen evolution

2018 ◽  
Vol 229 ◽  
pp. 1-7 ◽  
Author(s):  
Yong Jiang ◽  
Hongyan Ning ◽  
Chungui Tian ◽  
Baojiang Jiang ◽  
Qi Li ◽  
...  
Keyword(s):  
Single Crystal ◽  
Hydrogen Evolution ◽  
Tio2 Nanorods ◽  
Photocatalytic Hydrogen Evolution

Oxygen vacancy mediated construction of anatase/brookite heterophase junctions for high-efficiency photocatalytic hydrogen evolution

2017 ◽  
Vol 5 (47) ◽  
pp. 24989-24994 ◽  
Author(s):  
Xiaoqiang An ◽  
Chengzhi Hu ◽  
Huijuan Liu ◽  
Jiuhui Qu
Keyword(s):  
Oxygen Vacancy ◽  
Hydrogen Evolution ◽  
Oxygen Vacancies ◽  
High Efficiency ◽  
Photocatalytic Hydrogen Evolution

The formation and subsequent rearrangement of oxygen vacancies in anatase/brookite heterophase junctions led to 12-fold increased photoactivity for hydrogen evolution.

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