Effects of La-doping on charge separation behavior of ZnO:GaN for its enhanced photocatalytic performance

2016 ◽  
Vol 6 (4) ◽  
pp. 1033-1041 ◽  
Author(s):  
Yansong Zhou ◽  
Gang Chen ◽  
Yaoguang Yu ◽  
Lichen Zhao ◽  
Qilin Yu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Charge Carrier ◽  
Space Charge ◽  
Water Splitting ◽  
Charge Separation ◽  
Photocatalytic Performance ◽  
Photogenerated Charge Carrier ◽  
Charge Layer ◽  
Carrier Separation ◽  
Separation Behavior

In this work, lanthanum (La) has been proven as an effective space charge layer modifier to promote efficient photogenerated charge carrier separation for ZnO:GaN solid solution photocatalysts with enhanced photocatalytic water-splitting performance.

Designing C6N6/C2N van der Waals heterostructures for photogenerated charge carrier separation

2021 ◽  
Vol 23 (6) ◽  
pp. 3925-3933
Author(s):  
Moumita Mukherjee ◽  
Rajkumar Jana ◽  
Ayan Datta
Keyword(s):  
Charge Transfer ◽  
Charge Carrier ◽  
Water Splitting ◽  
Van Der Waals ◽  
Two Dimensional ◽  
Photogenerated Charge Carrier ◽  
Van Der Waals Heterostructure ◽  
Carrier Separation ◽  
Work Function Difference ◽  
Function Difference

A new two-dimensional C6N6/C2N van der Waals heterostructure is proposed to realize photocatalytic water splitting. The work function difference promotes charge transfer from the C2N to C6N6 layer.

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.

Experimental and first-principles studies of BiVO4/BiV1-xMnxO4-y n-n+ homojunction for efficient charge carrier separation in sunlight induced water splitting

2018 ◽  
Vol 43 (33) ◽  
pp. 15815-15822 ◽  
Author(s):  
Anupam Srivastav ◽  
Pawan Kumar ◽  
Anuradha Verma ◽  
York R. Smith ◽  
Vibha Rani Satsangi ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Water Splitting ◽  
First Principles ◽  
Efficient Charge ◽  
Carrier Separation

Fabrication Porous Ag/BiVO4 Film for Efficient Degradation of Phenol under Visible Light

2012 ◽  
Vol 518-523 ◽  
pp. 732-735 ◽  
Author(s):  
Xi Qiang Li ◽  
Xiu Fang Zhang ◽  
Xiao Li Dong ◽  
Chun Ma ◽  
Xin Xin Zhang ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Degradation Rate ◽  
Photocatalytic Performance ◽  
Xrd Analysis ◽  
Diffusion Resistance ◽  
Photocatalytic Efficiency ◽  
Photogenerated Electrons ◽  
Ag Particles ◽  
Carrier Separation ◽  
Rapid Transfer

Porous BiVO4 film was fabricated by templating procedure with polystyrene (PS) balls as the template. Ag particles were loaded on the porous BiVO4 film by photoreduction technique. SEM revealed there were many pores in the film and Ag particles were successfully loaded on the porous BiVO4 film. XRD analysis indicated that the chemical state of Ag particles was metallic Ag. The experiment of photocatalytic degradation of phenol showed that the degradation rate on porous Ag/BiVO4 film was 4.74 times as much as that on the BiVO4 film. The enhanced photocatalytic performance was firstly attributed to the rapid transfer of the photogenerated electrons from BiVO4 to Ag, which could increase the charge carrier separation, limit their recombination, and enhance the photocatalytic efficiency. Furthermore, porosity of the photocatalyst may enhance diffusion process and decrease diffusion resistance of the reactants throughout the channels in the photocatalyst, and thus improves the surface reactions.

Controllable in situ synthesis of BiOBrxI1−x solid solution on reduced graphene oxide with enhanced visible light photocatalytic performance

RSC Advances ◽  
2015 ◽  
Vol 5 (83) ◽  
pp. 68151-68158 ◽  
Author(s):  
Zhichong Yang ◽  
Fuxing Cheng ◽  
Xiaoping Dong ◽  
Fangming Cui
Keyword(s):  
Solid Solution ◽  
Graphene Oxide ◽  
Charge Separation ◽  
Photocatalytic Performance ◽  
In Situ Synthesis ◽  
Deposition Method ◽  
Reduced Graphene ◽  
Photocatalytic Activities ◽  
Visible Light Photocatalytic

BiOBrxI1−x–rGO solid solution photocatalysts have been developed by an in situ controllable deposition method, which possessed exceptional photocatalytic activities due to their more effective charge separation and transportation.

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