Efficient photocatalysis triggered by thin carbon layers coating on photocatalysts: recent progress and future perspecti
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tps://doi.org/10.1007/s11426-020-9767-9
SPECIAL ISSUE: 2020 Emerging Investigator Issue
Efficient photocatalysis triggered by thin carbon layers coating on photocatalysts: recent progress and future perspectives *
Yu-Long Men, Peng Liu, Xingcui Peng & Yun-Xiang Pan
Institute of Nano Biomedicine and Engineering, Shanghai Engineering Research Centre for Intelligent Diagnosis and Treatment Instrument, Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China Received March 30, 2020; accepted May 6, 2020; published online May 19, 2020
Solar-energy-driven photocatalysis, such as photocatalytic reduction of CO2, is promising simultaneously for the energy and environmental issues. Coating thin carbon layers with the thickness less than 10 nm on photocatalysts has been developed as an efficient strategy for enhancing the photocatalytic efficiency in recent years. In the present review, we summarize the crucial progress on carbon-coated photocatalysts. Origins for the improved light absorption, charge separation, reactant adsorption and photocatalytic stability on carbon-coated photocatalysts as well as the applications of carbon-coated photocatalysts are discussed. Future opportunities and challenges associated with carbon-coated photocatalysts are shown at the end of the review. We hope that the present review can trigger more deep insights on carbon-coated photocatalysts and provide new opportunities for developing low-cost but efficient photocatalysts. carbon-coated photocatalysts, light absorption, charge separation, reactant adsorption, photocatalytic stability Citation:
Men YL, Liu P, Peng X, Pan YX. Efficient photocatalysis triggered by thin carbon layers coating on photocatalysts: recent progress and future perspectives. Sci China Chem, 2020, 63, https://doi.org/10.1007/s11426-020-9767-9
1 Introduction Energy crisis and environmental pollution have become the most serious concerns for the mankinds [1]. Solar-energydriven photocatalysis is a promising strategy to simultaneously solve the energy and environmental issues [1–10]. For example, the photocatalytic reduction of carbon dioxide (CO2) can not only alleviate CO2 emission, but also produce valuable chemicals like methanol (CH3OH) [5–7]. Generally, a photocatalytic reaction proceeds via five steps, including (i) light absorption by photocatalysts to generate electronhole pairs, (ii) separation of the electron-hole pairs, (iii) transfer of the electrons and holes independently, (iv) adsorption of reactants on photocatalysts and (v) reaction of the adsorbed reactants with the photogenerated charge carriers *Corresponding author (email: [email protected])
[6–10]. Ideal photocatalysts should have high efficiencies in all of the above steps. But, most of the developed photocatalysts suffer from inferior light absorption, fast electronhole recombination, poor reactant adsorption and low stability [4–14]. This makes the photocatalytic efficiency still far
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