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Issue 18, 2020
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Ni-nanoparticle-bound boron nitride nanosheets prepared by a radiation-induced reduction-exfoliation method and their catalytic performance

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Abstract

The efficient exfoliation of hexagonal boron nitride (h-BN) to fabricate boron nitride nanosheets (BNNS) is a challenging task in the popular field of two-dimensional material preparation. In this paper, a new radiation-induced reduction-exfoliation method is introduced to achieve the one-step exfoliation of h-BN to form Ni-nanoparticle-(NiNP)-bound BNNS (Ni/BNNS) in a binary isopropanol/water medium using gamma-ray radiation at ambient temperature and pressure. The process involves the effective intercalation of Ni2+ ions into h-BN interlayers dispersed in the isopropanol/water medium, followed by the in situ growth of NiNPs under gamma-ray irradiation. Taking advantage of the volume expansion effect generated by the growth of the NiNPs and with help from a cationic surfactant, such as hexadecyltrimethylammonium chloride (CTAC), sheet-like Ni/BNNS in 200 nm squares and with an average BNNS thickness of less than 5 nm can be peeled from h-BN and stably dispersed in water. The prepared magnetic Ni/BNNS exhibits good catalytic performance, excellent structural stability, and reusability toward the reduction of 2-nitroaniline (2-NA). After 5 cycles, the conversion of 2-NA still reaches 95.9% within 500 s. More interestingly, when Ni/BNNS was dispersed in water/methanol solution at a content of 0.17 mg mL−1 followed by exposure to simulated sunlight irradiation, H2 evolution of 8404.3 μmol gNi−1 within 2 h can be detected. This work not only provides a new idea for realizing the exfoliation of layers of nanoscale sheets from h-BN, but it also opens a new route to the one-step preparation of two-dimensional-material-supported nanometal catalysts by taking advantage of gamma-ray radiation.

Graphical abstract: Ni-nanoparticle-bound boron nitride nanosheets prepared by a radiation-induced reduction-exfoliation method and their catalytic performance

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Supplementary files

Article information


Submitted
04 Apr 2020
Accepted
14 Apr 2020
First published
14 Apr 2020

J. Mater. Chem. A, 2020,8, 9109-9120
Article type
Paper

Ni-nanoparticle-bound boron nitride nanosheets prepared by a radiation-induced reduction-exfoliation method and their catalytic performance

Z. Jiang, W. Zhu, G. Xu, X. Xu, M. Wang, H. Chen, W. Huang, X. Ge and M. Lin, J. Mater. Chem. A, 2020, 8, 9109
DOI: 10.1039/D0TA03701J

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