Department of Chemistry, Karnataka University, Dharwad 560008, Karnataka, India.
Department of Chemistry, MSRIT, Bengaluru 560 054, Karnataka, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Oct 15;299:122879. doi: 10.1016/j.saa.2023.122879. Epub 2023 May 16.
Zinc oxide (ZnO) nanostructures, both undoped and Co-doped, were synthesized through the solution combustion process. The diffraction patterns from powder XRD revealed that the materials were crystalline. The morphology of the spherically formed nanoparticles was visualized in SEM micrographs. FTIR spectra verified the existence of a defect-associated peak in Co-encapsulated ZnO (ZnCoO) NPs. Photoluminescence studies are undertaken. Malachite Green (MG) dye is used as a representative organic pollutant to study the adsorptive degradation of Co-doped ZnO nanomaterial. Moreover, the adsorption properties, including isotherm and kinetics, are investigated by analyzing the degradation of MG dye. Experimental parameters, such as the concentration of the MG dye, dosage and pH, were varied to ascertain favorable conditions for the degradation study. The results indicate that the MG dye is 70% degraded. After Co-doping, near-band edge emission in undoped ZnO changed into intense red defect emission and was directly correlated with changes in PL emission.
氧化锌（ZnO）纳米结构，无论是未掺杂还是钴掺杂，都是通过溶液燃烧法合成的。粉末 XRD 的衍射图谱表明这些材料是结晶的。SEM 显微照片显示了球形纳米粒子的形态。FTIR 光谱证实了 Co 封装 ZnO（ZnCoO）NPs 中存在缺陷相关峰。进行了光致发光研究。孔雀石绿（MG）染料被用作代表性的有机污染物，以研究 Co 掺杂 ZnO 纳米材料的吸附降解。此外，还通过分析 MG 染料的降解研究了吸附性能，包括等温线和动力学。通过改变 MG 染料的浓度、用量和 pH 等实验参数，确定了降解研究的有利条件。结果表明，MG 染料的降解率达到了 70%。掺杂 Co 后，未掺杂 ZnO 的近带边发射变为强烈的红色缺陷发射，这与 PL 发射的变化直接相关。
