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44. Novel ZnO/Zn-Cr hydrotalcite-like anionic clay as a high-performance and recyclable material for efficient photocatalytic removal of organic dye under simulated solar irradiation
作者:H.-Y. Zhu, R. Jiang, J. Yao, F.-Q. Fu, J.-B. Li
关键字:Anionic clay; Dye; Photocatalysis; Decolorization; Adsorption
论文来源:期刊
具体来源:Research on Chemical Intermediates
发表时间:2015年
Reusable ZnO/Zn-Cr hydrotalcite-like anionic clays (ZnO/Zn-Cr HACs) were synthesized by a co-precipitation method and characterized by powder X-ray diffraction, Fourier transform infrared spectroscopy, N2 adsorption–desorption analysis, Elemental mapping patterns, scanning electronic microscope and UV-vis diffuse reflectance spectra. Its adsorption and photocatalytic activity towards organic pollutant (congo red as a model pollutant) were evaluated. Langmuir isotherm was used to ?t the equilibrium experiments. Saturated adsorption capacity of ZnO/Zn-Cr HACs was 426.29 mg g-1 at 308 K. The model pollutant could be fast and highly efficient removal from aqueous solution by ZnO/Zn-Cr HACs under simulated solar light irradiation. The experiments of cycles demonstrated that there was no evident change in the removal efficiency of CR solution by ZnO/Zn-Cr HACs for the ?fth time under simulated solar light irradiation, which indicated that ZnO/Zn-Cr HACs could be reused and will be favorable for effective elimination of toxic organic compounds in wastewater. Therefore, it is expected that ZnO/Zn-Cr HACs with layered structures and high surface areas can be potentially used as an effective and reusable materials for large-scale environmental puri?cation.