单壁碳纳米管显著增强的ZnO可见光催化活性

doi:10.3969/j.issn.0438-1157.2014.07.048

化工学报 ›› 2014, Vol. 65 ›› Issue (7): 2855-2860.DOI: 10.3969/j.issn.0438-1157.2014.07.048

• 材料化学工程与纳米技术 • 上一篇

单壁碳纳米管显著增强的ZnO可见光催化活性

卢艳红^1,2, 徐艳红², 张素玲¹, 白晓杰¹, 黄毅², 陈永胜²

1. 廊坊师范学院化学与材料科学学院, 河北廊坊 065000;
2. 南开大学化学学院高分子所, 天津化学化工协同创新中心, 天津 300071

收稿日期:2014-03-27 修回日期:2014-04-03 出版日期:2014-07-05 发布日期:2014-07-05
通讯作者: 黄毅
基金资助:
国家自然科学基金项目（21374050，51273093）；天津市基金项目（13RCGFGX01121）；河北省高等学校科学技术研究指导项目（z2012064）；廊坊师范学院科学研究项目（LSZQ200908）。

Visible-light photocatalytic activity of ZnO enhanced by single-walled carbon nanotubes

LU Yanhong^1,2, XU Yanhong², ZHANG Suling¹, BAI Xiaojie¹, HUANG Yi², CHEN Yongsheng²

1. School of Chemistry & Material Science, Langfang Teachers University, Langfang 065000, Hebei, China;
2. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China

Received:2014-03-27 Revised:2014-04-03 Online:2014-07-05 Published:2014-07-05
Supported by:
supported by the National Natural Science Foundation of China (21374050, 51273093), the Foundation Program of Tianjin (13RCGFGX01121), the Science and Technology Research Project of Higher Education of Hebei Province (z2012064) and the Science Research Project of Langfang Teachers College (LSZQ200908).

摘要/Abstract

摘要： 利用醋酸锌为原料，采用溶胶-凝胶法制备了单壁碳纳米管（SWMTs）和氧化锌的纳米复合物（ZnO/SWNTs）。用X射线衍射光谱（XRD）、拉曼光谱、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、热重分析（TGA）、傅里叶变换红外光谱（FT-IR）以及紫外-可见吸收光谱（UV-Vis）对复合物进行了表征。结果显示，粒径为10～20 nm的ZnO粒子均匀地负载在SWNTs表面，且在可见光区具有很好的光吸收性能。研究了ZnO/SWNTs光催化剂在太阳光照射下对甲基橙和亚甲基蓝的光催化降解情况。结果表明，复合物的催化活性明显高于ZnO。对于甲基橙，光照200 min后，降解率为99.8%，是纯ZnO（4.8%）的20倍；对于亚甲基蓝，仅光照20 min，降解率就达到了98.4%，是纯ZnO（4.0%）的25倍。

关键词: 碳纳米管, ZnO, 复合材料, 催化, 降解

Abstract: Nanocomposite ZnO/SWNTs of zinc oxide (ZnO) and single-walled carbon nanotubes (SWNTs) were fabricated by a sol-gel method using Zn(CH₃COO)₂·2H₂O as raw material. The samples were characterized by X-ray diffraction spectroscopy, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, Fourier transformed infrared spectroscopy and ultraviolet-visible spectroscopy. The results show that ZnO nanoparticles with the size of about 10 — 20 nm are closely deposited on the sidewalls of SWNTs and the nanocomposite presents enhanced absorption ability in the visible region. The composite exhibits a dramatically improved photocatalytic activity to decompose methyl orange and methylene blue in aqueous solutions under natural light. The photodegradation rate for methyl orange is 99.8% after 200 min, which is about 20 times that of pure ZnO (4.8%). For methylene blue, the degradation rate reaches 98.4% after 20 min, which is about 25 times that of pure ZnO (4.0%).

Key words: carbon nanotubes, ZnO, composite, catalysis, degradation

中图分类号:

O643
X703

卢艳红, 徐艳红, 张素玲, 白晓杰, 黄毅, 陈永胜. 单壁碳纳米管显著增强的ZnO可见光催化活性[J]. 化工学报, 2014, 65(7): 2855-2860.

LU Yanhong, XU Yanhong, ZHANG Suling, BAI Xiaojie, HUANG Yi, CHEN Yongsheng. Visible-light photocatalytic activity of ZnO enhanced by single-walled carbon nanotubes[J]. CIESC Journal, 2014, 65(7): 2855-2860.

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单壁碳纳米管显著增强的ZnO可见光催化活性

Visible-light photocatalytic activity of ZnO enhanced by single-walled carbon nanotubes

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