Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (7): 20220192.doi: 10.7503/cjcu20220192

• Article • Previous Articles     Next Articles

Chitosan Encapsulated CdSe QDs Assemblies for Visible Light-induced CO2 Reduction in an Aqueous Solution

XIA Wu1,2, REN Yingyi1, LIU Jing1, WANG Feng1()   

  1. 1.School of Chemistry and Chemical Engineering,Key Laboratory of Materials Chemistry for Energy Conversion and Storage,Ministry of Education,Hubei Key Laboratory of Material Chemistry and Service Failure,Huazhong University of Science and Technology,Wuhan 430074,China
    2.College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,China
  • Received:2022-03-27 Online:2022-07-10 Published:2022-05-09
  • Contact: WANG Feng E-mail:wangfengchem@hust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21871102)

Abstract:

MPA-CdSe@chitosan assemblies were constructed through the coordination of amino groups in chitosan to the surface Cd2+ of CdSe quantum dots(QDs). In MPA-CdSe@chitosan assemblies, chitosan with abundant amino groups and hydrophobic polymeric structure provides a CO2-rich and hydrophobic micro-environment for QDs, thereby promoting the efficiency and selectivity of photocatalytic CO2-to-CO conversion in an aqueous solution. The photocatalytic CO formation efficiency and selectivity of the MPA-CdSe@chitosan assemblies are 169 times and 8.6 times higher, respectively, than those of MPA-CdSe QDs system without chitosan. The MPA-CdSe@chitosan assemblies exhibited good stability of producing CO with an efficiency of 73.6 mmol/g(based on QDs’ mass) and a selectivity of 51.0% after 60 h of photocatalysis.

Key words: Photocatalysis, CO2 reduction, Assembly, CdSe quantum dots, Chitosan

CLC Number: 

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