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《Journal of Molecular Catalysis》 2013-05
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Preparation of Highly Efficient Ag@ AgBr Plasmonic Photocatalyst and Its Photocatalytic Performance under Visible Light

HU Jin-shan;WANG Huan;LIU Li;CUI Wen-quan;LIANG Ying-hua;College of Chemical Engineering,Hebei United University;Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials;  
A highly efficient and stable visible light driven Ag@ AgBr plasmonic photocatalyst was successfully fabricated through a hydrothermal and subsequently photo-reduction method. The as-prepared samples were characterized using XRD,SEM,EDX,DRS and XPS methods. The photocatalytic activities of the samples were evaluated by the degradation of Rhodamine B( RhB) under visible light irradiation. Recycling runs and scavengers were examined. The results show that the as-prepared Ag@ AgBr plasmonic photocatalysts showed a strong absorption in visible light region,which attributes to the plasmon resonance of Ag NPs anchored on the surface of AgBr particles.The obtained Ag@ AgBr photocatalyst showed excellent and stable photocatalytic performance for the degradation of RhB and more than 95% of RhB could be degradated in 90 min under visible light irradiation. Besides,after five recycled experiments the photocatalytic activity almost kept unchanged. The photodegradation was greatly suppressed by benzoquinone while slightly decreased by isopropanol and NaHCO3. The mechanism for the degradation of RhB by Ag@ AgBr under visible light irradiation was discussed.
【Fund】: 国家自然科学基金资助项目(51172063 51202056 51372068);; 河北省自然科学基金项目(E2012401070)
【CateGory Index】: O643.36
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