Citation: Pingjing Chang, Haiyang Cheng, Weiwei Lin, Xiaoru Li, Fengyu Zhao. A stable and active Ag_xS crystal preparation and its performance as photocatalyst[J]. Chinese Journal of Catalysis, ;2015, 36(4): 564-571. doi: 10.1016/S1872-2067(14)60288-6 shu

A stable and active Ag_xS crystal preparation and its performance as photocatalyst

Pingjing Chang ^a,b,c ,
Haiyang Cheng ^a,b ,
Weiwei Lin ^a,b ,
Xiaoru Li ^a,b,c ,
Fengyu Zhao ^a,b,,

1.
a State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China;

Corresponding author: Fengyu Zhao,
Received Date: 23 November 2014
Available Online: 8 January 2015
Fund Project: 国家自然科学基金(21273222). (21273222)

Ag_xS crystals were synthesized via hydrothermal (Ag_xS-H) and in situ ion-exchange (Ag_xS-IE) methods. The samples were characterized by scanning electron microscopy, X-ray diffraction, ultraviolet-visible-near infrared absorption spectroscopy, N₂ adsorption-desorption, X-ray photoelectron spectroscopy and surface photovoltage measurements. The photocatalytic performance was investigated for the decomposition of methyl blue (MB) under visible light irradiation (λ ≥ 420 nm). The Ag_xS-H had smaller particles, wider band gap and weaker recombination of photoinduced charges than Ag_xS-IE, resulting in a higher photocatalytic activity. Moreover, Ag_xS-H was stable, and could be reused five times without loss of photocatalytic activity. Additionally, a possible pathway for the photocatalytic degradation of MB over Ag_xS has been proposed, that MB was oxidized mainly by hydroxyl radicals and partly via electron holes generated in the Ag_xS. Ag_xS-H is an efficient photocatalyst and has great potential for the degradation of harmful organic dyes in wastewater.
- Silver sulfide,
- Visible light irradiation,
- Photocatalytic degradation,
- Organic pollutants,
- Band gap
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1.
沈阳化工大学材料科学与工程学院沈阳 110142

A stable and active AgxS crystal preparation and its performance as photocatalyst

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通讯作者: 陈斌, bchen63@163.com

A stable and active Ag_xS crystal preparation and its performance as photocatalyst