title: Ion-exchange synthesis of Ag/Ag2S/Ag3CuS2 ternary hollow microspheres with efficient visible-light photocatalytic activity.
abstract: Ternary Ag/Ag2S/Ag3CuS2 hollow microspheres were synthesized via an in situ ion-exchange method using Cu7S4 hollow submicrospheres as the template. The as-obtained Ag/Ag2S/Ag3CuS2 composite exhibited a well-defined uniform hollow microsphere morphology with an average diameter of about 1.3 μm. The photocatalytic property of the as-prepared Ag/Ag2S/Ag3CuS2 hollow microsphere composite was investigated by the decomposition of methyl orange (MO) under visible light irradiation (λ > 420 nm). It was shown that the photocatalytic activity of the Ag/Ag2S/Ag3CuS2 hollow microsphere was higher than those of Ag/Ag2S, Cu2O, Cu7S4 and P25 for the photodegradation of MO under visible light irradiation. Radical scavenger experiments demonstrated that superoxide radicals and holes were the main reactive species for MO degradation.
authors: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China. chenmin3226@sina.com dlj@ujs.edu.cn.
authors: Chaosheng
authors: C
authors: Xing
authors: Yuan
authors: Y
authors: Zhang
authors: Zhudong
authors: Z
authors: Wu
authors: Deli
authors: D
authors: Jiang
authors: Min
authors: M
authors: Chen