• 文献标题:   Advances in preparation, mechanism and applications of graphene quantum dots/semiconductor composite photocatalysts: A review
  • 文献类型:   Review
  • 作  者:   CHENG CY, LIANG QH, YAN M, LIU ZF, HE QY, WU T, LUO SH, PAN Y, ZHAO CH, LIU Y
  • 作者关键词:   photocatalysis mechanism, energy storage, environmental protection, gas monitoring, antibacterial, biomedicine
  • 出版物名称:   JOURNAL OF HAZARDOUS MATERIALS
  • ISSN:   0304-3894 EI 1873-3336
  • 通讯作者地址:  
  • 被引频次:   32
  • DOI:   10.1016/j.jhazmat.2021.127721 EA DEC 2021
  • 出版年:   2022

▎ 摘  要

Due to the low efficiency of single-component nano materials, there are more and more studies on high-efficiency composites. As zero dimensional (0D) non-metallic semiconductor material, the emergence of graphene quantum dots (GQDs) overcomes the shortcomings of traditional photocatalysts (rapid rate of electron-hole recombination and narrow range of optical response). Their uniqueness is that they can combine the advantages of quantum dots (rich functional groups at edge) and sp(2) carbon materials (large specific surface area). The inherent inert carbon stabilizes chemical and physical properties, and brings new breakthroughs to the development of benchmark photocatalysts. The photocatalytic efficiency of GQDs composite with semiconductor materials (SCs) can be improved by the following three points: (1) accelerating charge transfer, (2) extending light absorption range, (3) increasing active sites. The methods of preparation (bottom-up and top-down), types of hetemjunctions, mechanisms of photocatalysis, and applications of GQDs/SCs (wastewater treatment, energy storage, gas sensing, UV detection, antibiosis and biomedicine) are comprehensively discussed. And it is hoped that this review can provide some guidance for the future research on of GQDs/SCs on photocatalysis.