无机材料学报 ›› 2022, Vol. 37 ›› Issue (5): 534-540.DOI: 10.15541/jim20210267

• 研究论文 • 上一篇    下一篇

非贵金属Co5.47N/N-rGO助催化剂增强TiO2光催化制氢性能

安琳1, 吴淏1, 韩鑫2, 李耀刚1, 王宏志1, 张青红1()   

  1. 1. 东华大学 材料科学与工程学院 纤维材料改性国家重点实验室, 上海 201620
    2. 华东理工大学 化工学院 化学工程联合国家重点实验室, 上海 200237
  • 收稿日期:2021-04-25 修回日期:2021-06-08 出版日期:2022-05-20 网络出版日期:2021-06-30
  • 通讯作者: 张青红, 研究员. E-mail: zhangqh@dhu.edu.cn; 韩鑫, 讲师. E-mail: hanx@ecust.edu.cn
  • 作者简介:安琳(1993-), 女, 博士研究生. E-mail: al1619@163.com
  • 基金资助:
    国家自然科学基金面上项目(51572046)

Non-precious Metals Co5.47N/Nitrogen-doped rGO Co-catalyst Enhanced Photocatalytic Hydrogen Evolution Performance of TiO2

AN Lin1, WU Hao1, HAN Xin2, LI Yaogang1, WANG Hongzhi1, ZHANG Qinghong1()   

  1. 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
    2. State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2021-04-25 Revised:2021-06-08 Published:2022-05-20 Online:2021-06-30
  • Contact: ZHANG Qinghong, professor. E-mail: zhangqh@dhu.edu.cn; HAN Xin, lecturer. E-mail: hanx@ecust.edu.cn
  • About author:AN Lin (1993-), female, PhD candidate. E-mail: al1619@163.com
  • Supported by:
    National Natural Science Foundation of China(51572046)

摘要:

高效稳定的光催化剂或助催化剂研究一直是光催化领域的重要课题之一。本研究以氧化石墨烯、氯化钴和2-甲基咪唑为前驱体, 结合液相法和氨气氮化法制备了负载Co5.47N的氮掺杂还原氧化石墨烯(Co5.47N/N-rGO), 其中Co5.47N高度分散、晶粒尺寸为10~20 nm。Co5.47N/N-rGO可以作为助催化剂有效地改善商业二氧化钛(P25)的光催化分解水制氢性能, 当其质量分数为25%时, 催化剂的制氢性能可以达到11.71 mmol·h -1·g -1, 相比于纯P25提升了90倍, 与负载贵金属Pt的性能相当(11.88 mmol·h -1·g -1), 并且具有良好的稳定性。本研究为高效非贵金属助催化剂的研制提供了新思路。

关键词: Co5.47N, 氮掺杂石墨烯, TiO2, 光催化制氢, 助催化剂

Abstract:

Developing a highly efficient and stable photocatalyst or co-catalyst is one of the important topics in the field of photocatalysis research. In this study, graphene oxide, cobalt chloride and 2-methylimidazole were used as precursors to prepare Co5.47N-loaded nitrogen-doped reduced graphene oxide (Co5.47N/N-rGO) co- catalyst by combining liquid phase method and nitridation in flowing NH3 where Co5.47N with a crystallite size of 10~20 nm was highly dispersed over N-rGO surface. The Co5.47N/N-rGO co-catalyst significantly improves the hydrogen evolution performance of commercial nano TiO2 (P25). When the mass percent of Co5.47N/N-rGO was 25%, the hydrogen evolution rate of the obtained sample reached 11.71 mmol·h -1·g -1, which was 90 times higher than that of pure P25 and similar to that loaded noble metal Pt (11.88 mmol·h -1·g -1). Furthermore, the catalyst also has good stability. The research provides a new idea for the future development of efficient non-precious metal co-catalysts.

Key words: Co5.47N, nitrogen-doped graphene, TiO2, photocatalytic hydrogen evolution, co-catalyst

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