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AgI Nanoparticles Evenly Dispersed on 2D Porous Bi 5 O 7 I Sheets: Simple Synthesis and Excellent Photocatalytic Performance
Author(s) -
Ma Jinying,
Shi Lei,
Yao Lizhu,
Wang Zhimeng,
Lu Caiyun,
Qi Wei,
Su Dangsheng
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701968
Subject(s) - photocatalysis , rhodamine b , materials science , photodegradation , precipitation , visible spectrum , degradation (telecommunications) , chemical engineering , nanoparticle , valence (chemistry) , composite material , nanotechnology , catalysis , chemistry , optoelectronics , organic chemistry , physics , telecommunications , meteorology , computer science , engineering
A series of Bi 5 O 7 I/AgI composites were successfully prepared by the co‐precipitation method. Their feature and chemical structure were well characterized. The photocatalytic activity was evaluated by the degradation of Rhodamine B (RhB) under visible light. Experimental results indicated that the sizes of AgI exhibited obviously decrease through dispersing on the surface of Bi 5 O 7 I, and the as‐prepared Bi 5 O 7 I/AgI composites revealed better photocatalytic activities for the degradation of RhB than separate Bi 5 O 7 I and AgI. When the mass rate of Bi 5 O 7 I in Bi 5 O 7 I/AgI composites was 40%, the as‐prepared Bi 5 O 7 I/AgI (40 wt%) composites exhibited the optimum photocatalytic activity for degrading RhB, which was approximately 13 and 2.7 times higher than pure Bi 5 O 7 I and AgI, respectively. The enhanced photocatalytic performance could be attributed to complementary potentials of conduction band and valence band of Bi 5 O 7 I and AgI, which promoted the separation of the photogenerated electrons and holes. Finally, the possible mechanism for the photodegradation reaction over Bi 5 O 7 I/AgI composites was proposed.