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Designing effective and stable S‐scheme RGO/AgVO 3 /AgBr hybrid with enhanced photocatalytic performance
Author(s) -
Abulizi Abulikemu,
Zhang Tao,
Kadeer Kuerbangnisha,
Tursun Yalkunjan,
Talifur Dilinuer
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17801
Subject(s) - photocatalysis , nanorod , materials science , chemical engineering , exfoliation joint , nanotechnology , chemistry , graphene , catalysis , engineering , biochemistry
The low separation of photogenerated electron‐hole pairs and cycle stability has been the main bottleneck which restricts the development of photocatalytic technology for water purification. Here, RGO/AgVO 3 composites were fabricated by photo‐ultrasonic assisted reduction method, and AgBr nanoparticles were assembled on the surface of RGO/AgVO 3 via an in situ ion exchange method. A series of characterization and experimental results indicated that the introduction of RGO influenced the growth of crystal phase for AgVO 3 nanorods, resulting that AgVO 3 nanorods became thicker and shorter with the increase in RGO content. Moreover, RGO could also work as a bridge to promote the migration of electrons, leading different improvement for photocatalytic activity. Furthermore, in situ growth of AgBr on the surface of AgVO 3 nanorods could prevent its agglomeration and exfoliation, thus improving the photocatalytic activity and cycle stability of composites. RGO 1% /AgVO 3 /AgBr 30% exhibited excellent photocatalytic activity and stability for methylene blue (MB) degradation due to its unique structure, and its removal ratio reached at 96.2% within 50 min. Meanwhile, the separation of photogenerated electron‐hole pairs of AgVO 3 was markedly improved due to the introduction of RGO and AgBr. Based on the trapping experiments and theoretical calculation of band gap, a possible S‐scheme photocatalytic mechanism for improved photocatalytic activity was proposed.