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Visible‐light photocatalytic activity of Ag@MIL‐125(Ti) microspheres
Author(s) -
Guo Hongxu,
Guo Di,
Zheng Zishan,
Weng Wen,
Chen Jianhua
Publication year - 2015
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.3341
Subject(s) - photocatalysis , rhodamine b , x ray photoelectron spectroscopy , visible spectrum , catalysis , diffuse reflectance infrared fourier transform , chemistry , scanning electron microscope , hydrothermal circulation , nuclear chemistry , nanoparticle , degradation (telecommunications) , transmission electron microscopy , chemical engineering , spectroscopy , photochemistry , nanotechnology , materials science , composite material , organic chemistry , optoelectronics , telecommunications , computer science , engineering , physics , quantum mechanics
Ag nanoparticle (NP)‐decorated MIL‐125(Ti) microspheres (Ag@MIL‐125(Ti)) were firstly fabricated via a facile hydrothermal and following photo‐reduction method. The photocatalysts were characterized using X‐ray diffraction, scanning and transmission electron microscopies, X‐ray photoelectron spectroscopy and UV–visible diffuse reflectance spectroscopy. The characterization results indicated that Ag NPs were dispersed on the surface of MIL‐125(Ti) microspheres, and the Ag NPs had a uniform diameter of about 40 nm. The composites exhibited excellent visible‐light absorption, due to the modification with the Ag NPs. The photocatalytic activity for the visible‐light‐promoted degradation of Rhodamine B was improved through the optimization of the amount of Ag loaded as a co‐catalyst, this amount being determined as 3 wt%. Additionally, studies performed using radical scavengers indicated that O 2 − and e − served as the main reactive species. The catalyst can be reused at least five times without significant loss of its catalytic activity . Furthermore, a photocatalytic mechanism for degradation of organics over Ag@MIL‐125(Ti) is also proposed. Copyright © 2015 John Wiley & Sons, Ltd.