还原氧化石墨烯复合方式对Ag-TiO2基光电极电子传输性能的影响

doi:10.13278/j.cnki.jjuese.20180302

吉林大学学报(地球科学版) ›› 2020, Vol. 50 ›› Issue (1): 234-242.doi: 10.13278/j.cnki.jjuese.20180302

• 地质工程与环境工程 • 上一篇

还原氧化石墨烯复合方式对Ag-TiO₂基光电极电子传输性能的影响

董双石¹, 付绍珠¹, 于洋², 李超群¹, 初义聪²

1. 地下水资源与环境教育部重点实验室(吉林大学), 长春 130021;
2. 东北师范大学环境学院, 长春 130117

收稿日期:2019-04-25 发布日期:2020-02-11
作者简介:董双石(1980-),男,教授,博士生导师,主要从事水处理技术及资源化研究,E-mail:sdong@jlu.edu.cn
基金资助:
国家自然科学基金项目（51678270）

Effect of Reduced Graphene Oxide Composite Method on Electron Transport Performance of Ag-TiO₂ Based Photoelectrodes

Dong Shuangshi¹, Fu Shaozhu¹, Yu Yang², Li Chaoqun¹, Chu Yicong²

1. Key Lab of Groundwater Resources and Environment(Jilin University), Ministry of Education, Changchun 130021, China;
2. School of Environment, Northeast Normal University, Changchun 130117, China

Received:2019-04-25 Published:2020-02-11
Supported by:
Supported by National Natural Science Foundation of China (51678270)

摘要/Abstract

摘要： 为进一步提高Ag-TiO₂光催化效能，制备了还原氧化石墨烯（rGO）复合Ag-TiO₂基的光电极。先通过对比不同的复合方式探究rGO对Ag-TiO₂光催化剂表面电子传输和四环素降解效能的影响；再通过电化学阻抗谱测量、莫特-肖特基曲线等电化学手段对电极进行表征。结果表明：分层复合方式主要降低载体表面控制电极双层/薄膜的界面电阻，而全混复合方式主要降低总电荷转移电阻；分层电极的电子供体浓度随rGO质量分数增加而增大；在rGO质量分数为0.45%和0.25%时，分层复合和全混复合材料对四环素的降解速率分别比Ag-TiO₂提高11.4%和2.3%；在外加0.5 V偏压下，分层复合电极LG6降解效率比未加外偏压时提高了5.3%，而全混复合电极MG2效率没有提升。分层复合方式能更有效地提高光催化剂表面电子传输效能。

关键词: 还原氧化石墨烯, 光催化, Ag-TiO₂, 复合方式, 盐酸四环素

Abstract: The reduced graphene oxide (rGO) doped and Ag-TiO₂ based photoelectrodes were prepared to study the effect of the composite method on the electron transport and tetracycline degradation by photocatalyst. The electrodes were characterized by electrochemical impedance spectroscopy and Mott-Schottky curve. The results showed that the interface resistance of the double-layer/thin film was reduced by the layered composite method on the surface of the carrier; while the total charge transfer resistance was mainly reduced by the fully mixed composite method. In addition, the concentration of the electron donor increased with the increasing of composite amount. When the rGO mass fraction was 0.45% and 0.25%, the degradation rate of tetracycline by the layered composite and the fully mixed doped electrode was 11.4% and 2.3% higher than that of Ag-TiO₂, respectively. Under the applied 0.5 V bias voltage, the LG6 degradation efficiency of the layered composite electrode was increased by 5.3%; while the MG2 efficiency of the fully mixed composite electrode was not improved. The layered composite method can improve the electron transport efficiency more effectively on the surface of photocatalyst.

Key words: reduced graphene oxide, photocatalysis, Ag-TiO₂, composite method, tetracycline hydrochloride

中图分类号:

X522

董双石, 付绍珠, 于洋, 李超群, 初义聪. 还原氧化石墨烯复合方式对Ag-TiO₂基光电极电子传输性能的影响[J]. 吉林大学学报(地球科学版), 2020, 50(1): 234-242.

Dong Shuangshi, Fu Shaozhu, Yu Yang, Li Chaoqun, Chu Yicong. Effect of Reduced Graphene Oxide Composite Method on Electron Transport Performance of Ag-TiO₂ Based Photoelectrodes[J]. Journal of Jilin University(Earth Science Edition), 2020, 50(1): 234-242.

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还原氧化石墨烯复合方式对Ag-TiO₂基光电极电子传输性能的影响

Effect of Reduced Graphene Oxide Composite Method on Electron Transport Performance of Ag-TiO₂ Based Photoelectrodes

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