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

化工进展 ›› 2015, Vol. 34 ›› Issue (12): 4310-4314.DOI: 10.16085/j.issn.1000-6613.2015.12.029

微波辅助制备纳米ZnO及其光催化降解染料的性能

宋振宇¹, 童张法¹, 张寒冰^1,2, 陶靖鹏², 覃岳隆², 张蕾²

1 广西大学化学化工学院, 广西石化资源加工及过程强化技术重点实验室, 广西南宁 530004;
2 广西大学环境学院, 广西南宁 530004

收稿日期:2015-03-05 修回日期:2015-04-26 出版日期:2015-12-05 发布日期:2015-12-05
通讯作者: 童张法,教授,博士生导师。E-mailzhangftong@sina.com。
作者简介:振宇(1988—),男,硕士研究生。
基金资助:
国家自然科学基金(21166004)、广西石化资源加工及过程强化技术重点实验室主任课题(2013Z004)及广西大学博士启动科学基金(XBZ120056)项目。

Photocatalytic degradation of dyes by nano-ZnO prepared with microwave assistance

SONG Zhenyu¹, TONG Zhangfa¹, ZHANG Hanbing^1,2, TAO Jingpeng², QIN Yuelong², ZHANG Lei²

1 School of Chemistry and Chemical Engineering, Guangxi University, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Nanning 530004, Guangxi, China;
2 School of Environment, Guangxi University, Nanning 530004, Guangxi, China

Received:2015-03-05 Revised:2015-04-26 Online:2015-12-05 Published:2015-12-05

摘要/Abstract

摘要： 以硝酸锌、氢氧化钠为原料,聚乙二醇400(PEG 400)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。

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

Abstract: ZnO nanoparticles were prepared by microwave-assisted precipitation method using zinc nitrate and sodium hydroxide as raw materials and polyethylene glycol-400 as solvent. The prepared samples were characterized by means of XRD,FE-SEM and UV-Vis absorption spectra,respectively. The photocatalytic performance of nano-ZnO was carried out by degrading crystal violet and Congo red under UV light (λ=365nm) irradiation. Catalyst dosage,dyes concentration,pH value and reaction time were investigated to make clear how the parameters influenced the photocatalytic performance of nano-ZnO. The results show that the degradation efficiency of 50mg/L CV and CR could reach 98.8% and 97.4%,respectively. The pH value has little impact on dyes photocatalysis degradation and the degradation of CV and CR fit the first-order kinetic process.

Key words: nanomaterials, zinc oxide, PEG 400, microwave, catalysis, waste water, crystal violet, Congo red

中图分类号:

O643

宋振宇, 童张法, 张寒冰, 陶靖鹏, 覃岳隆, 张蕾. 微波辅助制备纳米ZnO及其光催化降解染料的性能[J]. 化工进展, 2015, 34(12): 4310-4314.

SONG Zhenyu, TONG Zhangfa, ZHANG Hanbing, TAO Jingpeng, QIN Yuelong, ZHANG Lei. Photocatalytic degradation of dyes by nano-ZnO prepared with microwave assistance [J]. Chemical Industry and Engineering Progree, 2015, 34(12): 4310-4314.

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微波辅助制备纳米ZnO及其光催化降解染料的性能

Photocatalytic degradation of dyes by nano-ZnO prepared with microwave assistance

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