Langmuir-Blodgett-assembled monolayer zinc ferrite nanoparticle film with unique photogenerated charge carrier separation efficiency and charge transfer behavior

2020 ◽  
Vol 534 ◽  
pp. 147646
Author(s):  
Yunyao Zhu ◽  
Wei Deng ◽  
Lin Chen ◽  
Jérémie Courtois ◽  
Qiang Tian ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Carrier ◽  
Zinc Ferrite ◽  
Separation Efficiency ◽  
Photogenerated Charge Carrier ◽  
Langmuir Blodgett ◽  
Transfer Behavior ◽  
Ferrite Nanoparticle ◽  
Carrier Separation ◽  
Nanoparticle Film

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.

A solar-to-chemical conversion efficiency up to 0.26% achieved in ambient conditions

2021 ◽  
Vol 118 (46) ◽  
pp. e2115666118
Author(s):  
Yu-Xin Ye ◽  
Jinhui Pan ◽  
Yong Shen ◽  
Minhui Shen ◽  
Huijie Yan ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Charge Carrier ◽  
Separation Efficiency ◽  
Biomass Conversion ◽  
Chemical Conversion ◽  
Electron Acceptors ◽  
Ambient Conditions ◽  
Reduction Efficiency ◽  
Earth Abundant ◽  
Carrier Separation

Artificial photosynthesis in ambient conditions is much less efficient than the solar-to-biomass conversion (SBC) processes in nature. Here, we successfully mimic the NADP-mediated photosynthetic processes in green plants by introducing redox moieties as the electron acceptors in the present conjugated polymeric photocatalyst. The current artificial process substantially promotes the charge carrier separation efficiency and the oxygen reduction efficiency, achieving a photosynthesis rate for converting Earth-abundant water and oxygen in air into hydrogen peroxide as high as 909 μmol⋅g−1⋅h−1 and a solar-to-chemical conversion (SCC) efficiency up to 0.26%. The SCC efficiency is more than two times higher than the average SBC efficiency in nature (0.1%) and the highest value under ambient conditions. This study presents a strategy for efficient SCC in the future.

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.

Boosting charge carrier separation efficiency by constructing an intramolecular DA system towards efficient photoreduction of CO2

2021 ◽  
Vol 45 (13) ◽  
pp. 6042-6052
Author(s):  
Xinyu Zhang ◽  
Mei Wang ◽  
Xianghai Song ◽  
Yongsheng Yan ◽  
Pengwei Huo ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Separation Efficiency ◽  
Photocatalytic Reduction ◽  
Recombination Process ◽  
Donor And Acceptor ◽  
Carrier Separation

The charge carrier excitation–recombination process between the donor and acceptor, and the photocatalytic reduction of CO2 to CO over CN based DA composites.

Electric field dependent photogenerated charge carrier separation in bipyridine containing poly(p-phenylene vinylene)

2001 ◽  
Vol 121 (1-3) ◽  
pp. 1559-1560 ◽  
Author(s):  
Geetha K. Varier ◽  
K.S. Narayan ◽  
G. Nakmanovich ◽  
Y. Eichen ◽  
E. Ehrenfreund
Keyword(s):  
Charge Carrier ◽  
Electric Field ◽  
Phenylene Vinylene ◽  
Photogenerated Charge Carrier ◽  
Field Dependent ◽  
Carrier Separation

Dependence of photocatalysis on charge carrier separation in Ag-doped and decorated TiO2nanocomposites

2016 ◽  
Vol 6 (24) ◽  
pp. 8428-8440 ◽  
Author(s):  
Ranjana S. Varma ◽  
Nirmala Thorat ◽  
R. Fernandes ◽  
D. C. Kothari ◽  
N. Patel ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Carrier ◽  
Light Absorption ◽  
Visible Range ◽  
Photocatalytic Efficiency ◽  
Carrier Separation ◽  
The Relationship

Ag–TiO2nanocomposite systems have been investigated with the aim of understanding the relationship between the photocatalytic efficiency and the contributions of various structures resulting in charge carrier separation, charge transfer and extension of light absorption to the visible range.

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.

Enhanced charge carrier separation of manganese(ii)-doped graphitic carbon nitride: formation of N–Mn bonds through redox reactions

2018 ◽  
Vol 6 (15) ◽  
pp. 6238-6243 ◽  
Author(s):  
Haiping Li ◽  
Yuguo Xia ◽  
Tingxia Hu ◽  
Quanhua Deng ◽  
Na Du ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Redox Reactions ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Inert Gas ◽  
Graphitic Carbon Nitride ◽  
Photogenerated Charge Carrier ◽  
Nitride Formation ◽  
Carrier Separation

MnII-doped g-C3N4 obtained through redox reactions between a permanganate and urea upon calcination in an inert gas exhibits enhanced photogenerated charge carrier separation.

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