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
Abstract: 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. 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 purification.
Keywords: Anionic clay; Dye;
Photocatalysis; Decolorization; Adsorption
The aim of Research on
Chemical Intermediates is to publish current research articles and concise
dynamic reviews on the properties, structures and reactivities of intermediate
species in all the various domains of chemistry. Issues also contain articles
in related disciplines such as spectroscopy, molecular biology and
biochemistry, atmospheric and environmental sciences, catalysis, photochemistry
and photophysics. The journal is published in one volume of 9 issues per annum.