化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (5) : 291-297. DOI: 10.19817/j.cnki.issn1006-3536.2022.05.059

开发与应用

α-Fe₂O₃纳米片的制备及对三乙胺气敏性能研究

作者信息 +

Preparation of α-Fe₂O₃ nanosheets and their gas sensing property to triethylamine

Liu Hui, Liu Bin, Lv Lu, Liu Haijun, Du Yanping, Chang Wei

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文章历史 +

Received
2020-12-19
Issue Date	Revised Date
2022-06-06	2020-12-19

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摘要

以九水硝酸铁(Fe(NO₃)₃·9H₂O)为铁源、氢氧化钠(NaOH)为沉淀剂、氟化钠(NaF)为配位剂和十六烷基三甲基溴化铵(CTAB)为表面活性剂,通过水热法制备了α-Fe₂O₃纳米片。并采用X射线粉末衍射(XRD)和扫描电镜(SEM)对样品进行了结构和形貌表征,在不同条件下对其进行气敏性能测试。结果表明,α-Fe₂O₃纳米片的直径约为0.5～1.6μm,厚度约为80～100nm;α-Fe₂O₃纳米片对三乙胺气体有着良好的选择性和较高的灵敏度,最佳工作温度为240℃。在240℃时,对50μL的三乙胺灵敏度达到了45.5;在240℃时,对100×10^-6的三乙胺的响应时间约为8s,恢复时间约2s。

Abstract

α-Fe₂O₃ nanosheets were prepared by hydrothermal method using Fe(NO₃)₃·9H₂O as an iron source,sodium hydroxide (NaOH) as precipitant,sodium fluoride (NaF) as complexing agent and cetyltrimethylammonium bromide (CTAB) as surfactant.The structure and morphology of the samples were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM).The results shown that the diameter of α-Fe₂O₃ nanosheets was about 0.5～1.6μm,and the thickness was about 80～100nm.α-Fe₂O₃ nanosheets had good selectivity and high sensitivity to triethylamine gas,and the optimal working temperature was 240℃.The sensitivity of 50μL triethylamine reached 45.5 at 240℃,and the response time to 100ppm triethylamine was about 8s and the recovery time was about 2s at 240℃.

关键词

α-Fe₂O₃ / 纳米片 / 水热法 / 三乙胺 / 气敏性能

Key words

α-Fe₂O₃ / nanosheet / hydrothermal method / triethylamine / gas sensing property

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α-Fe₂O₃纳米片的制备及对三乙胺气敏性能研究[J]. 化工新型材料, 2022, 50(5): 291-297 DOI:10.19817/j.cnki.issn1006-3536.2022.05.059

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