Journal of Radiation Research and Radiation Processing ›› 2020, Vol. 38 ›› Issue (3): 77-80.doi: 10.11889/j.1000-3436.2020.rrj.38.031001

• RESEARCH HIGHLIGHT • Previous Articles    

Preparation of nano-metal/boron nitride nanosheets composite catalyst by a radiation-induced reduction-exfoliation method

JIANG Zhiwen1(),ZHU Wengang1,XU Guoqing1,XU Xiangjianfei1,WANG Mozhen1(),CHEN Hongbing2,HUANG Wei2,GE Xuewu1(),LIN Mingzhang3   

  1. 1.CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
    2.Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
    3.Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, China
  • Received:2020-05-06 Revised:2020-06-04 Accepted:2020-06-04 Online:2020-06-20 Published:2020-06-18
  • Contact: WANG Mozhen,GE Xuewu E-mail:jzhiwen@mail.ustc.edu.cn;pstwmz@ustc.edu.cn;xwge@ustc.edu.cn
  • About author:JIANG Zhiwen(male) was born in 1993, and obtained his bachelor's degree from Northeastern University in June 2016. Now he is a graduate student at University of Science and Technology of China, focusing on radiation exfoliation and functionalization of boron nitride. E-mail: jzhiwen@mail.ustc.edu.cn
  • Supported by:
    Science Challenge Project(TZ2018004);National Natural Science Foundation of China(51773189);Joint Laboratory for University of Science and Technology of China and Yanchang Petroleum(ES2060200084);the Fundamental Research Funds for the Central Universities(WK6030000057)

Abstract:

The fabrication of boron nitride nanosheets (BNNS) by the exfoliation of hexagonal boron nitride (h-BN) remains a challenging task in the field of two-dimensional material (TDM) preparation. Radiation-induced reduction-exfoliation (RIRE) is a new method of preparation of BNNS from h-BN. RIRE is achieved by the disruption of the interlayer interactions in a h-BN crystal by means of the volume expansion caused by the formation of Ni nanoparticles (NiNPs). NiNPs are formed via the radiation reduction of Ni2? ions intercalated between the h-BN crystal layers. As a result, sheet-like NiNP (approximately 20 nm)-bound BNNS (Ni/BNNS) in 200 nm squares, with an average thickness of less than 5 nm, was successfully peeled from h-BN under ambient temperature and pressure conditions in an alcohol/water medium. The prepared Ni/BNNS exhibited excellent catalytic performance, good structural stability, and viability for magnetic separation, which make Ni/BNNS recyclable. More notably, when the water/methanol dispersion containing Ni/BNNS was exposed to simulated sunlight irradiation, H2 evolution of 8 404.3 μmol/g Ni within 2 h was detected. Therefore, this work provides a new means for the preparation of BNNS by the efficient exfoliation of h-BN, introduces a one-step preparation method for novel TDM-supported nano-metal catalysts, and offeres new insight into the catalytic mechanism of visible-light catalysts.

Key words: Boron nitride nanosheet, γ-ray irradiation, Radiation reduction, Nano-metal catalyst, Photocatalytic hydrogen production

CLC Number: 

  • TL13