4.6 Article

A novel 2D graphene oxide modified α-AgVO3 nanorods: Design, fabrication, and enhanced visible-light photocatalytic performance

Journal

JOURNAL OF ADVANCED CERAMICS
Volume 11, Issue 2, Pages 308-320

Publisher

TSINGHUA UNIV PRESS
DOI: 10.1007/s40145-021-0534-6

Keywords

alpha-AgVO3; graphene oxide modified alpha-AgVO3 nanorods (GO/alpha-AgVO3); photocatalysis; graphene oxide (GO) nanosheets; in-situ coprecipitation processing

Funding

  1. National Natural Science Foundation of China [52102068]
  2. Key Laboratory Foundation of the Science and Technology on Advanced Functional Composite Laboratory [6142906200509]
  3. Natural Science Foundation of Jiangsu Province [20KJB430017]
  4. NUPTSF [NY219162]
  5. Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX20_0789]

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This study designed a novel photocatalyst GO/alpha-AgVO3 to improve the separation of photocarriers and enhance the catalytic performance. The 0.5 wt% GO/alpha-AgVO3 exhibited the best performance for RhB decomposition under visible-light irradiation. The enhanced performance was attributed to the suitable bandgap of alpha-AgVO3 nanorods and the efficient separation of photocarriers by GO nanosheets.
Silver vanadates are promising visible-light-responded photocatalysts with suitable bandgap for solar absorption. However, the easy recombination of photogenerated carriers limits their performance. To overcome this obstacle, a novel 2D graphene oxide (GO) modified alpha-AgVO3 nanorods (GO/alpha-AgVO3) photocatalyst was designed herein to improve the separation of photocarriers. The GO/alpha-AgVO3 was fabricated through a facile in-situ coprecipitation method at room temperature. It was found that the as-prepared 0.5 wt% GO/alpha-AgVO3 exhibited the most excellent performance for rhodamine B (RhB) decomposition, with an apparent reaction rate constant 18 times higher than that of pure alpha-AgVO3 under visible-light irradiation. In light of the first-principles calculations and the hetero junction analysis, the mechanism underpinned the enhanced photocatalytic performance was proposed. The enhanced photocatalytic performance was ascribed to the appropriate bandgap of alpha-AgVO3 nanorods for visible-light response and efficient separation of photocarriers through GO nanosheets. This work demonstrates the feasibility of overcoming the easy recombination of photogenerated carriers and provides a valuable GO/alpha-AgVO3 photocatalyst for pollutant degradation.

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