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.

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.

Z-scheme Mo2C/MoS2/In2S3 Dual-heterojunction for Photocatalytic Reduction of Cr(VI)

2021 ◽  
Author(s):  
Xin Zhang ◽  
Fenyang Tian ◽  
Longyu Qiu ◽  
Manyi Gao ◽  
Weiwei Yang ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Photocatalytic Reduction ◽  
Major Obstacle ◽  
Practical Application

Inferior separation efficiency of the photo-induced carriers is still a major obstacle to the practical application of photocatalyst, whereas the suitable design of dual-heterojunction is expected to break through this...

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