标题:From ultrathin nanosheets, triangular plates to nanocrystals with exposed (102) facets, a morphology and phase transformation of sp(2) hybrid BN nanomaterials
作者:Wang, Liancheng; Hang, Ruiqiang; Xu, Yao; Guo, Chunli; Qian, Yitai
作者机构:[Wang, Liancheng; Xu, Yao] Chinese Acad Sci, Key Lab Carbon Mat, Inst Coal Chem, Taiyuan 030001, Shanxi, Peoples R China.; [Hang, Ruiqiang] Taiyuan 更多
通讯作者:Wang, L
通讯作者地址:[Wang, LC]Chinese Acad Sci, Key Lab Carbon Mat, Inst Coal Chem, Taiyuan 030001, Shanxi, Peoples R China.
来源:RSC ADVANCES
出版年:2014
卷:4
期:27
页码:14233-14240
DOI:10.1039/c3ra47005a
摘要:730 degrees C). Interestingly, the intergrowths of r-BN and h-BN into the BNTP and BNNC plate was obtained in the range of 600-690 degrees C, which were determined via the selected area electron diffraction (SAED) pattern. Basically, the sizes (side length and thinness) of BNTPs and BNNCs can be tuned by adjusting the reaction temperature and time. The phase transformation temperature was much lower than that of previous reports. The in situ produced Fe nanoparticles, molten Na and autogenic pressure were considered to have positive effects on the phase transformation. Their band gap was estimated to be 5.6-5.8 eV according to the optical absorption spectrum, and Cathodoluminescence (CL) images show that as-synthesized BN nanomaterials had uniform optical properties in the ultraviolet region. Besides, the Ag-BN composite showed excellent antibacterial activities and therefore has potential applications in biomedical and related fields.">In this study, an "autoclave route" was applied for the synthesis of 2D sp(2) hybrid BN nanomaterials. By simply increasing the reaction temperature, a phase and morphology transformation occurs. The turbostratic BN nanosheets (BNNSs, 2-6 nm, 400-500 degrees C) transformed into the mixed phases (r-BN and h-BN) of triangular nanoplates (BNTPs) in the temperature range of 550-600 degrees C, and finally to h-BN nanocrystals (BNNCs, >730 degrees C). Interestingly, the intergrowths of r-BN and h-BN into the BNTP and BNNC plate was obtained in the range of 600-690 degrees C, which were determined via the selected area electron diffraction (SAED) pattern. Basically, the sizes (side length and thinness) of BNTPs and BNNCs can be tuned by adjusting the reaction temperature and time. The phase transformation temperature was much lower than that of previous reports. The in situ produced Fe nanoparticles, molten Na and autogenic pressure were considered to have positive effects on the phase transformation. Their band gap was estimated to be 5.6-5.8 eV according to the optical absorption spectrum, and Cathodoluminescence (CL) images show that as-synthesized BN nanomaterials had uniform optical properties in the ultraviolet region. Besides, the Ag-BN composite showed excellent antibacterial activities and therefore has potential applications in biomedical and related fields.
收录类别:EI;SCOPUS;SCIE
WOS核心被引频次:14
Scopus被引频次:15
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896972527&doi=10.1039%2fc3ra47005a&partnerID=40&md5=b1aa8a75f894f1238ba407adcdc3ed69
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