物理化学学报 >> 2017, Vol. 33 >> Issue (10): 2082-2091.doi: 10.3866/PKU.WHXB201705176

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贵金属负载的棒状ZnO复合光催化剂的制备及其提升的光催化性能

陈阳1,3,杨晓燕2,3,*(),张鹏3,刘道胜1,*(),桂建舟1,3,彭海龙3,刘丹1,3,*()   

  1. 1 辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001
    2 商丘师范学院化学化工学院,河南商丘476000
    3 天津工业大学环境与化学工程学院,分离膜与膜过程国家重点实验室,天津300389
  • 收稿日期:2017-03-10 发布日期:2017-07-17
  • 通讯作者: 杨晓燕,刘道胜,刘丹 E-mail:yxysmallyxy@aliyun.com.;dsliu05@126.com;danliu_939@hotmail.com
  • 基金资助:
    国家自然科学基金(21576211);河南省教育厅科学技术重点研究项目(16A150019)

Noble Metal-Supported on Rod-Like ZnO Photocatalysts with Enhanced Photocatalytic Performance

Yang CHEN1,3,Xiao-Yan YANG2,3,*(),Peng ZHANG3,Dao-Sheng LIU1,*(),Jian-Zhou GUI1,3,Hai-Long PENG3,Dan LIU1,3,*()   

  1. 1 Division of Chemistry, Chemical Engineering and Environment, Liaoning Shihua University, Fushun 113001, Liaoning Porvince, P. R. China
    2 School of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, Henan Porvince, P. R. China
    3 State Key Laboratory of Separation Membranes & Membrane Processes, School of Environmental & Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China
  • Received:2017-03-10 Published:2017-07-17
  • Contact: Xiao-Yan YANG,Dao-Sheng LIU,Dan LIU E-mail:yxysmallyxy@aliyun.com.;dsliu05@126.com;danliu_939@hotmail.com
  • Supported by:
    the National Natural Science Foundation of China(21576211);Key Scientific and Technological Project of the Education Department of Henan Province, China(16A150019)

摘要:

以水热制备的ZnO纳米棒为基底,通过乙二醇液相还原法负载不同贵金属颗粒(Pt、Pd、Ru)构筑贵金属负载的ZnO纳米棒复合光催化剂。实验结果表明在制备条件相同时,Pt/ZnO样品中Pt颗粒尺寸较小,分布均匀;Pd/ZnO样品中Pd颗粒尺寸较大且团聚严重;Ru/ZnO样品则几乎没有Ru颗粒负载。在紫外光照射下降解亚甲基蓝的反应中,Pt/ZnO表现出最高的光催化性能,Pd/ZnO样品次之,而Ru/ZnO则表现出与ZnO纳米棒相似的光催化活性;表明小尺寸和大小均匀的贵金属颗粒对ZnO纳米棒的催化性能有着显著的提升作用。对Pt/ZnO来说,当Pt载量为3.2%时Pt/ZnO催化剂的光催化活性最高。

关键词: 氧化锌, 光催化, 贵金属负载, 光降解, 亚甲基蓝

Abstract:

In the present work, we successfully synthesized ZnO nanorods under hydrothermal conditions, which have been utilized as the matrix to fabricate various noble metal (Pt, Pd, and Ru)-supported ZnO photocatalysts by subsequent reduction with ethylene glycol. In terms of systematic characterization, it was found that the Pt particles in the Pt/ZnO composite have small size with narrow size distribution, while the Pd particles in the Pd/ZnO composite have a larger size distribution due to aggregation. On the other hand, no Ru particles were practically observed in the Ru/ZnO composite. In the photodegradation of a methylene blue solution under UV light irradiation, both Pt/ZnO and Pd/ZnO exhibited significantly enhanced photocatalytic activity compared with the ZnO nanorods, whereas no noticeable increase of catalytic activity could be observed in the case of Ru/ZnO. Furthermore, the photocatalytic activity of the Pt/ZnO catalyst was higher than that of Pd/ZnO, due to its small-sized and uniform Pt particles. Therefore, noble metal particles with small size and high dispersion contribute to the enhancement of the photocatalytic performance of ZnO materials. After detailed investigation of various Pt/ZnO composites with different Pt loadings, it was demonstrated that the optimal Pt loading required to maximally improve the photocatalytic performance of ZnO nanorods corresponds to 3.2%.

Key words: Zinc oxide, Photocatalysis, Supported Noble Metal, Photodegradation, Methylene blue

MSC2000: 

  • O643