物理化学学报 >> 2016, Vol. 32 >> Issue (11): 2785-2793.doi: 10.3866/PKU.WHXB201608304

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铜掺氧化锌多孔纳米棒的水热合成及其光催化性能

王元有1,2,周国强1,张龙1,刘天晴1,*()   

  1. 1 扬州大学化学化工学院,江苏省环境材料与环境工程重点实验室,江苏扬州225002
    2 扬州工业职业技术学院化工系,江苏扬州225127
  • 收稿日期:2016-06-27 发布日期:2016-11-08
  • 通讯作者: 刘天晴 E-mail:tqliu@yzu.edu.cn
  • 基金资助:
    国家自然科学基金(21505118);江苏省自然科学基金(BK2150438);江苏省环境材料与环境工程重点实验室开放课题(K13065);高职院校高级访问学者计划(2015FX089);江苏省“青蓝工程”资助项目

Synthesis and Photocatalytic Characterization of Porous Cu-Doped ZnO Nanorods

Yuan-You WANG1,2,Guo-Qiang ZHOU1,Long ZHANG1,Tian-Qing LIU1,*()   

  1. 1 Jiangsu Key Laboratory of Environmental Material and Environmental Engineering, School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, Jiangsu Province, P. R. China
    2 Department of Chemical Engineering, Yangzhou Polytechnic Institute, Yangzhou 225127, Jiangsu Province, P. R. China
  • Received:2016-06-27 Published:2016-11-08
  • Contact: Tian-Qing LIU E-mail:tqliu@yzu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21505118);Natural Science Foundation of Jiangsu Province, China(BK2150438);Jiangsu Key Laboratory of Environmental Material and Environmental Engineering, China(K13065);Priority Academic Program Development of Jiangsu Higher Education Institutions, Senior Visiting Scholar Program of Jiangsu Higher Vocational College, China(2015FX089);Qing Lan Project of Jiangsu Province, China

摘要:

通过两步法合成铜掺杂的氧化锌纳米棒,通过X射线衍射(XRD)、扫描电子显微镜(FESEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)和紫外-可见(UV-Vis)分光光谱等技术对系列样品进行了表征,研究并探索了铜掺杂的氧化锌纳米棒光降解染料罗丹明B(RhB)和气体乙醛的催化活性。通过对多孔Cu掺杂ZnO纳米棒光催化分解乙醛进行了评价。多孔Cu掺杂ZnO纳米棒(CZ-5)光催化剂具有最高的催化分解乙醛的能力,比其它多孔Cu掺杂ZnO纳米棒具有很高的催化活性。多孔Cu掺杂ZnO纳米棒光催化剂在室温下在可见光(435 nm)下照射16 h,5.50×10-4φ,体积分数)的乙醛气体完全降解为二氧化碳(CO2)。多孔铜掺杂的氧化锌纳米棒光催化剂的光催化性能的改善主要归因于铜和氧化锌纳米棒之间的协同作用。这种改进的光催化协同作用归因于Cu掺杂ZnO的可见光吸收的延伸和光生电子空穴对的抗重组。

关键词: 半导体, 铜掺杂的氧化锌, 纳米棒, 光催化

Abstract:

A two-step method was developed for the selective synthesis of porous ZnO nanorods (undoped and Cu doped):first, Zn[C6H4(COO)2]·H2O and Cu doped Zn[C6H4(COO)2]·H2O nanorods were synthesized via the hydrothermal reaction of Zn(NO3)2·6H2O, NaOH, KHC8H4O4, and Cu(NO3)2·3H2O at 120℃ for 6 h; second, porous undoped and doped ZnO nanorods were obtained by thermal decomposition of the precursors in air at 500℃ for 2 h, respectively. The porous ZnO nanorods were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible (UV-Vis) spectroscopy. The photocatalytic degradation of rhodamine B (RhB) aqueous solution shows that the porous Cu-doped ZnO nanorods have the highest photodegradation performance with visible light and acetaldehyde (CH3CHO) gas degradation. These results are because of the special interface structures of the catalysts and fast separation of its photogenerated charge carriers. These favorable photocatalytic properties of the doped microstructures demonstrate their potential for degradation of wastewater and aldehydes.

Key words: Semiconductor, Cu-doped ZnO, Nanorod, Photocatalysis

MSC2000: 

  • O643