高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (9): 2926.doi: 10.7503/cjcu20210155

• 物理化学 • 上一篇    下一篇

Z型 g-C3N4/Pt/TiO2纳米管阵列复合电极的制备及光电氧化甲醇性能

徐晓龙, 方礼宁, 刘长宇, 刘敏超(), 郏建波()   

  1. 五邑大学生物科技与大健康学院,江门 529000
  • 收稿日期:2021-03-09 出版日期:2021-09-10 发布日期:2021-09-08
  • 通讯作者: 刘敏超 E-mail:wyuchemlmc@126.com;jbjia@wyu.edu.cn
  • 作者简介:郏建波, 男, 博士, 教授, 主要从事电化学传感器、 电化学催化与分析应用的研究. E-mail: jbjia@wyu.edu.cn
  • 基金资助:
    国家自然科学基金(21974097);广东省教育厅重点专项(2020KSYS004);江门市科学技术局应用基础研究专项(2019030102360012639)

Preparation of Z-type g-C3N4/Pt/TiO2 Nanotube Array Composite Electrode and Its Performance of Photoelectric Oxidation of Methanol

XU Xiaolong, FANG Lining, LIU Changyu, LIU Minchao(), JIA Jianbo()   

  1. School of Biotechnology and Health Sciences,Wuyi University,Jiangmen 529000,China
  • Received:2021-03-09 Online:2021-09-10 Published:2021-09-08
  • Contact: LIU Minchao E-mail:wyuchemlmc@126.com;jbjia@wyu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21974097);the Key Special Projects of GuangdongProvincial Department of Education,China(2020KSYS004);the Applied Basic Research Program of Science andTechnology Bureau of Jiangmen,China(2019030102360012639)

摘要:

以NH4Cl为气体模板吹制双氰胺制备g-C3N4纳米片, 并将其负载于Pt/TiO2纳米管阵列(Pt/TiO2 NTs)上, 制备了一种新型的Z型g-C3N4/Pt/TiO2NTs复合电极材料. 通过扫描电子显微镜、 X射线衍射和X射线光电子能谱对该材料的结构进行了表征, 采用电化学和光电化学方法研究了材料的性能. 研究结果显示, 在可见光照射下, g-C3N4/Pt/TiO2 NTs复合材料具有高效的光电氧化甲醇的性能. 该复合材料的高性能主要归因于以下两点: (1) g-C3N4与Pt/TiO2NTs的结合有效扩展了其在可见光范围的吸收; (2) Z型电荷转移保留了具有强氧化能力的空穴和强还原能力的电子, 从而使光生中间体作用于电催化过程增强了甲醇氧化效率.

关键词: g-C3N4纳米片, Pt/TiO2纳米管, 复合电极, 甲醇氧化

Abstract:

g-C3N4 nanosheets were prepared by blowing dicyandiamide with NH4Cl as a gas template, and then loaded on Pt/TiO2 nanotube arrays(Pt/TiO2 NTs) to prepare a new type of Z-type g-C3N4/Pt/TiO2 NTs composite electrode. The structure of the material was characterized by means of scanning electron microscopy, X-ray diffraction spectrometer, and X-ray photoelectron spectroscopy. Electrochemical and photoelectrochemical methods were used to inspect the characteristics of the materials. The results show that the g-C3N4/Pt/TiO2 NTs composite has an efficient performance of photoelectric oxidation of methanol under visible light irradiation. There are two main reasons for the high performance of g-C3N4/Pt/TiO2 NTs composite: (1) the combination of g-C3N4 and Pt/TiO2 NTs effectively expands the absorption in the visible light range; (2) Z-type charge transfer retains strong oxidation ability of holes and strong reduction of electrons, so that the photo-generated interme-diate acts on the electrocatalytic process and enhances the efficiency of methanol oxidation.

Key words: g-C3N4 nanosheet, Pt/TiO2 nanotube, Composite electrode, Methanol oxidation

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