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化工进展  2015 

微波辅助制备纳米ZnO及其光催化降解染料的性能

DOI: 10.16085/j.issn.1000-6613.2015.12.029, PP. 4310-4314

Keywords: 纳米材料,氧化锌,聚乙二醇,400,微波,催化,废水,结晶紫,刚果红

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Abstract:

以硝酸锌、氢氧化钠为原料,聚乙二醇400(PEG400)为溶剂,采用微波加热共沉淀法制备纳米ZnO,并采用X射线衍射、场发射电镜及紫外-可见漫反射对样品进行表征;考察纳米ZnO对结晶紫(CV)及刚果红(CR)的光催化降解性能,以λ=365nm的紫外光为光源,考察了催化剂投加量、染液浓度、pH值以及催化时间对催化效率的影响。实验结果表明,在较少的投加量下,纳米ZnO对50mg/L的CV和CR染液的降解率可分别达到98.8%和97.4%,pH值对两种染料的光催化效果影响不大。CR及CV染液的光催化降解均符合一级动力学。

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