RGO/ZnO纳米棒复合材料的合成及光催化性能

doi:10.11868/j.issn.1001-4381.2016.12.008

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摘要

采用水热合成法制备ZnO纳米棒及RGO/ZnO纳米棒复合材料。研究不同含量的RGO对RGO/ZnO纳米棒复合材料光催化活性的影响。采用X射线衍射仪(XRD)、场发射电子显微镜(FESEM)、光电子能谱仪(XPS)及漫反射紫外-可见吸收光谱(UV-Vis)检测手段对RGO/ZnO进行表征。结果显示:RGO与ZnO纳米棒成功复合。加入GO的含量不同,获得的RGO/ZnO样品在可见光区域的吸光度值不同。以甲基橙作为模拟污染物的光催化结果表明,RGO/ZnO复合材料具有高的紫外-可见光光降解效率,加入GO与ZnO的质量比为3%时,样品紫外-可见光光催化性能最佳,120min内甲基橙基本可以完全降解;且在波长大于400nm可见光照射下,RGO/ZnO具有一定的可见光活性,180min内其降解甲基橙效率最大可达26.2%。同时,RGO/ZnO具有较好的光稳定性。

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	芦佳
	王辉虎
	董一帆
	常鹰
	马新国
	董仕节

关键词 ：还原石墨烯, ZnO, 光催化, 甲基橙

Abstract：

ZnO nanorods and RGO/ZnO nanorods composites were prepared by hydrothermal method. The influence of RGO content on the photocatalytic activity of RGO/ZnO nanorods composites was studied. ZnO nanorods and RGO/ZnO nanocomposites were characterized by X-ray diffraction (XRD), field emission electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS) and diffuse reflectance UV-visible absorption spectroscopy techniques. The results show that RGO/ZnO samples are synthesized successfully. With different additions of GO, the RGO/ZnO samples obtained exhibit different absorption characteristics in visible light region. The photocatalytic results of using methyl orange (MO) as the simulated pollutant show that RGO/ZnO nanorods composites exhibit high degradation efficiency under UV-Vis light illumination. The highest photocatalytic performance is obtained for RGO/ZnO composites when the mass ratio of RGO to ZnO is 3%. MO is almost completely degraded in 120min. RGO/ZnO also shows the visible-light-driven photocatalytic activity under visible light illumination (λ>400nm), and the maximum MO degradation efficiency in 180min can reach 26.2%, meanwhile, RGO/ZnO samples exhibit good photostability.

Key words： reduced graphene oxide ZnO photocatalysis methyl orange

收稿日期: 2015-01-09 出版日期: 2016-12-16

基金资助:国家自然科学基金资助项目(51202064,51472081);湖北省自然科学基金资助项目(2013CFA085);武汉市青年晨光科技计划资助项目(2013070104010016)

通讯作者: 王辉虎 E-mail: wanghuihu@126.com

作者简介: 王辉虎(1978-),男,副教授,博士,研究方向为纳米材料制备与性能,联系地址:湖北省武汉市洪山区南湖李纸路一村1号湖北工业大学机械工程学院(430068),E-mail:wanghuihu@126.com

引用本文:

芦佳, 王辉虎, 董一帆, 常鹰, 马新国, 董仕节. RGO/ZnO纳米棒复合材料的合成及光催化性能[J]. 材料工程, 2016, 44(12): 48-53.
Jia LU, Hui-hu WANG, Yi-fan DONG, Ying CHANG, Xin-guo MA, Shi-jie DONG. Synthesis and Photocatalytic Performance of RGO/ZnO Nanorod Composites. Journal of Materials Engineering, 2016, 44(12): 48-53.

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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.12.008 或 http://jme.biam.ac.cn/CN/Y2016/V44/I12/48

Fig.1 RGO，ZnO和RGO/ZnO样品的XRD谱图

Fig.2 RGO/ZnO样品的FESEM图
(a)1%RGO/ZnO;(b)3%RGO/ZnO;(c)5%RGO/ZnO;(d)7%RGO/ZnO

Fig.3 3%RGO/ZnO样品的C1s
(a),O1s(b)和Zn2p(c) XPS谱图

Fig.4 RGO，ZnO和RGO/ZnO样品的UV-Vis谱图

Fig.5 ZnO和RGO/ZnO样品紫外-可见光降解MO曲线

Fig.6 ZnO和RGO/ZnO样品可见光降解MO曲线

Fig.7 3%RGO/ZnO样品5次循环降解MO图

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