Visible light induced CO2 reduction and Rh B decolorization over electrostatic-assembled AgBr/palygorskite |
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Authors: | Zhang Xiaojie Li Jinli Lu Xin Tang Changqing Lu Gongxuan |
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Institution: | State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China. zhangxiaojie19771224@126.com |
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Abstract: | AgBr/palygorskite composite was prepared by an in situ electrostatic adsorption-deposition-precipitation method and characterized by field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), UV-Vis diffuse reflection, and BET surface measurements techniques. The layer negative charge and larger specific surface area of palygorskite, along with the poor cation-exchange ability of tetra-n-butyl ammonium cation (N(CH(2)CH(2)CH(2)CH(3))(4)(+)) due to its larger ion radius, could mainly account for high dispersity of AgBr on the surface of fibrous palygorskite. The rate of Rh B decolorization and CO(2) reduction with H(2) as a proton donor and reductant over AgBr/palygorskite was about three and two times faster than that of the corresponding bare AgBr, respectively. The strategy reported in this work can be easily extended to synthesize other palygorskite-based heterostructure catalysts. |
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