共沉淀法制备(Ag, Ni)共掺杂 ZnO 纳米粒子的电性能及光催化活性增强。

Electrical behavior and enhanced photocatalytic activity of (Ag, Ni) co-doped ZnO nanoparticles synthesized from co-precipitation technique.

机构信息

Department of Physics, Kalaignar Karunanidhi Institute of Technology, Coimbatore 641402, India.

Department of Physics, AMET University, Kanathur, Chennai 603 112, India.

出版信息

Water Sci Technol. 2020 Mar;81(6):1296-1307. doi: 10.2166/wst.2020.230.

DOI:10.2166/wst.2020.230

PMID:32597415

Abstract

Methylene blue (MB) dye is the most common harmful, toxic, and non-biodegradable effluent produced by the textile industries. The present study investigates the effect of zinc oxide (ZnO) nanoparticles (NPs) and Ag-Ni doped ZnO NPs on the performance of photocatalytic degradation of MB dye. Pure ZnO and Ag-Ni doped ZnO NPs are synthesized using the co-precipitation method. The crystalline nature and surface morphology of the synthesized pure ZnO and Ag-Ni doped ZnO NPs was characterized by powder X-ray diffraction, scanning electron microscopy (SEM), and high resolution transmission electron microscopy (HRTEM) analysis. The presence of spherical-like morphologies was confirmed from SEM and HRTEM analysis. The presence of Ni-O and Zn-O bands in the synthesized materials was found by Fourier transform infrared (FTIR) spectroscopy analysis. The MB dye was degraded under UV-light exposure in various pH conditions. The Ag (0.02%)-Ni doped ZnO NPs exhibits highest photocatalytic activity of 77% under pH 4.

摘要

亚甲蓝（MB）染料是纺织工业产生的最常见的有害、有毒且不可生物降解的废水。本研究考察了氧化锌（ZnO）纳米粒子（NPs）和 Ag-Ni 掺杂 ZnO NPs 对 MB 染料光催化降解性能的影响。纯 ZnO 和 Ag-Ni 掺杂 ZnO NPs 是通过共沉淀法合成的。通过粉末 X 射线衍射、扫描电子显微镜（SEM）和高分辨率透射电子显微镜（HRTEM）分析对合成的纯 ZnO 和 Ag-Ni 掺杂 ZnO NPs 的晶体性质和表面形态进行了表征。从 SEM 和 HRTEM 分析中证实了具有类球形形态的存在。通过傅里叶变换红外（FTIR）光谱分析发现了合成材料中 Ni-O 和 Zn-O 带的存在。在各种 pH 值条件下，MB 染料在紫外光照射下被降解。Ag（0.02%）-Ni 掺杂 ZnO NPs 在 pH 值为 4 时表现出最高的光催化活性，为 77%。