journal article·2023-06-27

Reaction Pathway Analysis of B/Li2O in a Li–B–O System for Boron Nitride Nanotube Growth

Kai Zhang, Pan Xue, Jianghua Wu, Liyun Wu, Nanyang Wang, Tao Xu, Kaiping Zhu, Jun Pu, Qiulong Li, Yu Deng, Yagang Yao, Jin Zhang

Chemistry of Materials· Volume 35· Issue 12
Publisher page

Abstract

Compared to other synthetic methods, the synthesis of boron nitride nanotubes (BNNTs) by the boron oxide chemical vapor deposition (BOCVD) method can balance the purity and quality of the product nanotubes. However, due to the solid reaction characteristics of boron monomers, the closed reaction system, and the synthesis temperature of over 1000 °C, growth studies of BNNTs have been in a dilemma. To this end, simultaneous thermal analysis combined with multi-atmosphere annealing experiments at corresponding temperatures is used to study the inorganic solid-state reaction of the classical BOCVD precursor B/Li 2 O in real time and confirmed by experimental results that lithium borate is the actual active component and catalyst. Further experiments reveal that the growth process of BNNTs and lithium borate not only consumes less of the precursor and ammonia but is also flexible in its configuration, showing exceptional efficiency and reactivity. Lastly, experiments have shown that the structure and activity of borate are equally applicable to alkali metals, alkaline earth metal, and transition metals.
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Research context

OpenAlex topics: Boron and Carbon Nanomaterials Research · MXene and MAX Phase Materials · Graphene research and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, Jiangsu, China

i-Lab, CAS Center for Excellence in Nanoscience, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, China

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, Anhui, China

College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China

Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China

Funding

National Natural Science Foundation of China

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