溶剂热法制备硒化钨纳米花及其气敏性能研究

doi:10.11962/1006-4990.2020-0337

Abstract

Abstract:

Using N,N-dimethylformamide as dispersant as well as sodium selenite and sodium tungstate as raw materials,the flower-like WSe₂ nanomaterial stacked by ultrathin two-dimensional layered nanosheets were prepared by solvothermal met-hod and its gas sensing properties were also studied.The structure of as-synthesized material was characterized by X-ray po-wder diffraction（XRD）,scanning electron microscopy（SEM） and transmission electron microscopy（TEM）.The results indi-cated that the synthesized flower-like WSe₂ was hexagonal phase and had the high selectivity and ultrafast response/recovery rate to triethylamine among the gas sensing properties to amine gases including triethylamine,ammonia,trimethylamine,ani-line and formamide.Under the optimum operating temperature of 220 ℃,the sensitivity of the sensor to triethylamine with vol-ume fraction of 50×10 ^-6 reaches 20.1,the response time and recovery time are 6 s and 3 s respectively,and the minimum de-tection limit is 0.3×10^-6.The gas sensing mechanism for the WSe₂ nanomaterial was also discussed.The obtained WSe₂ had po-tential applications in the gas sensing field.

Key words: WSe₂, flower-like structure, solvothermal method, gas sensing

CLC Number:

TQ125.2

Gui Yanghai,Wang Xinghui,Tian Kuan,Qian Linlin. Study on preparation of flower-like WSe₂ nanomaterial by solvothermal method and its gas sensing properties[J]. Inorganic Chemicals Industry, 2021, 53(5): 47-50.

Figures/Tables 6

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Inorganic Acid-Base-Salt Committee of CIESC

Study on preparation of flower-like WSe₂ nanomaterial by solvothermal method and its gas sensing properties

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