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Efficient Adsorption and Photocatalytic Degradation of Dyes by AgI‐Bi 2 MoO 6 /Vermiculite Composite under Visible Light
Author(s) -
Zhu Pengfei,
Wang Ruoxu,
Duan Ming,
Chen Yanjun,
Hu Min,
Luo Xinruo,
Teng Huan
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901873
Subject(s) - vermiculite , photocatalysis , adsorption , materials science , malachite green , x ray photoelectron spectroscopy , degradation (telecommunications) , composite number , chemical engineering , visible spectrum , absorption (acoustics) , nuclear chemistry , inorganic chemistry , composite material , chemistry , catalysis , organic chemistry , telecommunications , computer science , engineering , optoelectronics
A novel efficient AgI‐Bi 2 MoO 6 /vermiculite adsorption‐photocatalyst is successfully synthesized by sol‐gel method and precipitation method. The structure and properties of AgI‐Bi 2 MoO 6 /vermiculite were analyzed by XRD, FT‐IR, XPS, SEM, TEM, BET, and DRS. All the AgI‐Bi 2 MoO 6 /vermiculite composites with different AgI content show enhanced photocatalytic performance for malachite green (MG) dye degradation compared to pure Bi 2 MoO 6 and Bi 2 MoO 6 /vermiculite composites. The highest degradation efficiency for MG (30 mg/L) via 5 wt%‐AgI‐Bi 2 MoO 6 /vermiculite composite (AgI content 5 wt%) photocatalyst (1 g/L) reaches 98.89% in 60 min at pH 9 without salt. The enhanced performance can be attributed to the uniform dispersion of Bi 2 MoO 6 and AgI on the surface of vermiculite, the stable structure, the enhanced adsorption and the widened visible‐light absorption range as well as the faster separation of electron‐hole pairs. Besides, the photocatalyst still shows relatively high adsorption and photocatalytic performance after three times recycling. In addition, the possible photocatalytic mechanism is proposed at the end.