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
writer：H.-Y. Zhu, R. Jiang, J. Yao, F.-Q. Fu, J.-B. Li
keywords：Anionic clay; Dye; Photocatalysis; Decolorization; Adsorption
source：期刊
specific source：Research on Chemical Intermediates
Issue time：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.