凝胶网格控制合成纳米ZnO及其光催化活性

doi:10.7517/j.issn.1674-0475.2009.03.207

影像科学与光化学 ›› 2009, Vol. 27 ›› Issue (3): 207-214.DOI: 10.7517/j.issn.1674-0475.2009.03.207

凝胶网格控制合成纳米ZnO及其光催化活性

汪应灵¹, 谢友海², 刘国光^2,3, 周建国², 周庆祥²

1. 新乡医学院, 化学教研室, 河南, 新乡453003;
2. 河南师范大学, 化学与环境科学学院, 黄淮水环境与污染防治省部共建教育部重点实验室, 河南, 新乡, 453007;
3. 广东工业大学, 环境科学与工程学院, 广州, 510006

收稿日期:2008-09-09 修回日期:2009-02-09 出版日期:2009-05-23 发布日期:2009-05-23
通讯作者: 汪应灵(1972-),女,硕士,讲师,主要从事纳米可控制备及光谱性能研究.
基金资助:
国家自然科学基金资助项目(20877022);河南省基础与前沿技术研究项目(092300410105);河南省教育厅自然科学研究计划资助项目(2008A610007).

Gel-Network Controlled Synthesis of ZnO Nanoparticles and Their Photocatalytic Activities

WANG Ying-ling¹, XIE You-hai², LIU Guo-guang^2,3, ZHOU Jian-guo², ZHOU Qing-xiang²

1. Department of Chemistry, Xinxiang Medical College, Xinxiang 453003, Henan, P.R.China;
2. College of Chemistry and Environmental Science, Key Laboratory for Yellow River and Huaihe River Water Environmental and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, Henan, P.R.China;
3. Faculty of Environment Science & Engineering, Guangdong University of Technology, Guangzhou 510006, P.R.China

Received:2008-09-09 Revised:2009-02-09 Online:2009-05-23 Published:2009-05-23

摘要/Abstract

摘要： 以明胶为反应介质,采用凝胶网格控制合成法制备了单分散球形纳米ZnO光催化剂.利用TG-DTA、XRD、TEM、BET、UV-Vis、HPLC等测试手段对制备过程、样品的结构和性能进行了研究,探讨了明胶浓度、煅烧温度对产物粒径和光催化活性的影响.结果表明:利用凝胶网格控制合成法不仅能够控制纳米微粒的形状和大小,而且可防止沉淀物相互聚集和团聚.以染料罗丹明B溶液为目标降解物,1 h的降解率为99.9%,最佳光催化剂的合成条件:13%明胶浓度、350℃煅烧2 h.

关键词: 纳米ZnO, 凝胶网格控制合成法, 光催化活性, 罗丹明B

Abstract: ZnO nanoparticles have been prepared by means of a novel gel-network controlled synthesis method using gelatin as a template at lower temperature condition.The products were characterized by using TG-DTA,XRD,TEM,BET,UV-Vis and HPLC techniques.The products appeared to be regularly spherical or elliptical and their sizes range from 20 to 40 nm.The average particle size increased with increasing calcining temperature,and decreased with increasing gelatin concentration.Furthermore,photodegradation of Rhodamine B in aqueous solution was also investigated by using the ZnO nanopowders as the photocatalyst.It was found that the product(13% gelatin concentration) calcinated at 350 ℃ for 2 h nearly induced 99.9% degradation of Rhodamine B in 1 h.

Key words: ZnO nanoparticles, gel-network controlled synthesis, photocatalytic activity, Rhodamine B

中图分类号:

O614

汪应灵, 谢友海, 刘国光, 周建国, 周庆祥. 凝胶网格控制合成纳米ZnO及其光催化活性[J]. 影像科学与光化学, 2009, 27(3): 207-214.

WANG Ying-ling, XIE You-hai, LIU Guo-guang, ZHOU Jian-guo, ZHOU Qing-xiang. Gel-Network Controlled Synthesis of ZnO Nanoparticles and Their Photocatalytic Activities[J]. Imaging Science and Photochemistry, 2009, 27(3): 207-214.

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凝胶网格控制合成纳米ZnO及其光催化活性

Gel-Network Controlled Synthesis of ZnO Nanoparticles and Their Photocatalytic Activities

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