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Founded in 1987， Bimonthly
Supervisor：Jiangxi University Of Science And Technology
Sponsored by：Jiangxi University Of Science And Technology
Jiangxi Nonferrous Metals Society
ISSN：1674-9669
CN：36-1311/TF
CODEN YJKYA9
Volume 9 Issue 1
Feb.  2018
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ZENG Debin, YANG Kai, LI Xiaoxiao, YAO Zhiqiang, LIU Renyue, WU Zhen, TIAN Jian, YU ChangLin. Synthesis and characterization of core-shell like Ag2CO3@AgBr composite photocatalyst and its high visible light photocatalytic performance[J]. Nonferrous Metals Science and Engineering, 2018, 9(1): 51-59. DOI: 10.13264/j.cnki.ysjskx.2018.01.009
Citation: ZENG Debin, YANG Kai, LI Xiaoxiao, YAO Zhiqiang, LIU Renyue, WU Zhen, TIAN Jian, YU ChangLin. Synthesis and characterization of core-shell like Ag2CO3@AgBr composite photocatalyst and its high visible light photocatalytic performance[J]. Nonferrous Metals Science and Engineering, 2018, 9(1): 51-59. DOI: 10.13264/j.cnki.ysjskx.2018.01.009
shu

Synthesis and characterization of core-shell like Ag2CO3@AgBr composite photocatalyst and its high visible light photocatalytic performance

  • 1.

    School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

  • 2.

    State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China

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  • Received Date: September 14, 2017
  • Published Date: February 27, 2018
    Graphical Abstract
    • Abstract
  • Core-shell like Ag2CO3@AgBr composite photocatalyst was fabricated by the successive precipitation method. The obtained AgBr, Ag2CO3, Ag2CO3@AgBr samples were well characterized by N2 physical adsorption, powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectra, and photocurrent test. The effects of AgBr shell on the texture, light absorption, photocurrent response and photocatalytic performance for main Ag2CO3 photocatalyst were investigated. The results showed that Ag2CO3@AgBr composite displayed much stronger and broader visible light absorption than pure AgBr and Ag2CO3. A distinct increase in both surface area and photocurrent density for Ag2CO3@AgBr was observed. Under visible light (400 nm < λ < 660 nm) irradiation, the photocatalytic activity test in degradation of methyl orange (MO) dye showed that Ag2CO3@AgBr showed excellent photocatalytic activity and the degradation rate constant over Ag2CO3@AgBr (0.209 min-1) was 14 times higher than that of Ag2CO3 (0.0136 min-1), 10 times faster than that of AgBr (0.0180 min-1). Moreover, in recycling photoactivity tests, AgBr and Ag2CO3 fast lost the activity, but high stabilty was obtained over Ag2CO3@AgBr. Between the AgBr shell and Ag2CO3 core, the produced intimate Ag2CO3/AgBr interface with matched band-gap structure largely promoted the transfer of photogenerated electrons and holes. Moreover, the AgBr shell could effectively inhibit the dissolution of Ag2CO3 in aqueous solution, resulting in extremely high stability.
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