학술논문
Synthesis and evaluation of the gas sensing properties of 2D h-BNNSs as a semiconductor based gas sensor on H2S and CO gases at various temperatures
Document Type
Conference
Author
Source
2021 6th International Conference on Nanotechnology for Instrumentation and Measurement (NanofIM) Nanotechnology for Instrumentation and Measurement (NanofIM), 2021 6th International Conference on. :1-5 Nov, 2021
Subject
Language
ISSN
2770-9515
Abstract
Two-dimensional (2D) hexagonal boron nitride nanosheets (h-BNNSs) were synthesized using wet chemical reaction method through chemical vapor deposition (CVD) catalyst-free approach. The crystallinity of the nanosheets with the stacking of the B and N honeycomb lattice was validated by the XRD, while the TEM disclosed the specimen orientations and chemical compositions of phases with the number of layers of a planar honeycomb BN sheet. The FTIR, RM and the UV-vis expressed the formation of the in-plane, out-of-plane h-BN vibrations and, the nature of the surface with the thickness together with its optical properties. BET examined the surface properties of the h-BNNSs. The gas sensing properties of the 2D h-BNNSs were also investigated on hydrogen sulfide (H2S) and carbon monoxide (CO). The fabricated sensor based on 800 - $\boldsymbol{900}^{\circ}\mathrm{C}$ h-BNNSs showed good sensitivity towards ppm of H2S at $\boldsymbol{250}^{\circ}\mathrm{C}$. The excellent gas sensing properties could be attributed to high surface area, small crystallite size, defects of h-BNNSs. Overall, the h-BNNSs were found to be more sensitive to H 2 S than CO.