花状WO_3纳米结构的水热合成及其甲醛气敏研究
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摘要
采用中温水热法合成了三维花状WO_3纳米结构,通过X射线衍射仪(XRD)和扫描电子显微镜(SEM)对样品的物相成分及微观形貌进行了表征。同时基于合成的花状WO_3纳米材料制备了气敏元件,测试了其在200℃的最佳工作温度下,对体积分数为40×10~(-6)的HCHO气体的气敏性能。结果表明,该气敏元件对HCHO气体有优异的选择性及稳定性,同时对HCHO气体灵敏度可达18.57。
Three-dimensional flower-like WO_3 nanostructure was synthesized by the middle temperature hydrothermal method. The phase composition and morphology of the sample was characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM). Meanwhile,a gas sensor based on the synthetic flower-like WO_3 nanomaterial was fabricated,and its gas sensitivity to 40×10~(-6) formaldehyde gas was tested at the optimum operating temperature of 200 ℃. The results show that the gas sensor has excellent selectivity and stability to formaldehyde,and its sensitivity to formaldehyde gas is 18.57.
Three-dimensional flower-like WO_3 nanostructure was synthesized by the middle temperature hydrothermal method. The phase composition and morphology of the sample was characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM). Meanwhile,a gas sensor based on the synthetic flower-like WO_3 nanomaterial was fabricated,and its gas sensitivity to 40×10~(-6) formaldehyde gas was tested at the optimum operating temperature of 200 ℃. The results show that the gas sensor has excellent selectivity and stability to formaldehyde,and its sensitivity to formaldehyde gas is 18.57.
引文
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[13] 洪长翔,周渠,张清妍,等.氧化锌气体传感器的制备及甲烷检测特性研究[J].传感技术学报,2017,30(5):645-649.
[14] Yu Y,Zeng W,Xu,M,et al.Hydrothermal Synthesis of WO3·H2O with Different Nanostructures from 0D to 3D and Their Gas Sensing Properties[J].Physica E,2016,79:127-132.林珑(1985-),男,现为重庆水利电力职业技术学院讲师,主要从事电气设备绝缘在线智能监测及故障诊断的研究,linlongcq@163.com;吕程(1985-),男,现为重庆水利电力职业技术学院讲师,主要从事敏感材料及气体传感器的研究,lvchengcq@163.com。
[2] 张玉才,阿不都卡德尔·阿不都克尤木.纳米三氧化钨的水热合成及其性能研究[J].化工新型材料,2017,45(9):172-174.
[3] Behera B,Chandra S.Synthesis of WO3 Nanorods by Thermal Oxidation Technique for NO2 Gas Sensing Application[J].Mater Sci Semicond Process,2018,86:79-84.
[4] 杨洁,张萌,邵燕,等.氧化钨纳米纤维的制备及其对H2S的气敏特性[J].微纳电子技术,2017,54(9):627-632.
[5] Marikutsa A,Yang L,Rumyantseva M,et al.Sensitivity of Nanocrystalline Tungsten Oxide to CO and Ammonia Gas Determined by Surface Catalysts[J].Sensor Actuat B—Chem,2018,277:336-346.
[6] Yao S,Qu F,Wang G,et al.Facile Hydrothermal Synthesis of WO3 Nanorods for Photocatalysts and Supercapacitors[J].J Alloy Compd,2017,724:695-702.
[7] Foroushani F T,Tavanai H,Ranjbar M,et al.Fabrication of Tungsten Oxide Nanofibers via Electrospinning for Gasochromic Hydrogen Detection[J].Sensor Actuat B-Chem,2018,268:319-327.
[8] Parthibavarman M,Karthik M,Prabhakaran S.Facile and One Step Synthesis of WO3 Nanorods and Nanosheets as an Efficient Photocatalyst and Humidity Sensing Material[J].Vacuum,2018,155:224-232.
[9] gupta v k,agarwal s,bharti a k,et al.Pt Nanoparticles Decorated WO3-MWCNTs Nanocomposites:Preparation,Characterization,and Adsorption Behavior[J].J Mol Liq,2017,229:514-519.
[10] Shinde P A,Lokhande A C,Patil A M,et al.Facile Synthesis of Self-Assembled WO3 Nanorods for High-Performance Electrochemical Capacitor[J].J Alloy Compd,2019,770:1130-1137.
[11] Zeng W,Miao B,Li T,et al.Hydrothermal Synthesis,Characterization of h-WO3 Nanowires and Gas Sensing of Thin Film Sensor Based on This Powder[J].Thin Solid Films,2015,584:294-299.
[12] Upadhyay S B,Mishra R K,Sahay P P.Cr-Doped WO3 Nanosheets:Structural,Optical and Formaldehyde Sensing Properties[J].Ceram Int,2016,42(14):15301-15310.
[13] 洪长翔,周渠,张清妍,等.氧化锌气体传感器的制备及甲烷检测特性研究[J].传感技术学报,2017,30(5):645-649.
[14] Yu Y,Zeng W,Xu,M,et al.Hydrothermal Synthesis of WO3·H2O with Different Nanostructures from 0D to 3D and Their Gas Sensing Properties[J].Physica E,2016,79:127-132.林珑(1985-),男,现为重庆水利电力职业技术学院讲师,主要从事电气设备绝缘在线智能监测及故障诊断的研究,linlongcq@163.com;吕程(1985-),男,现为重庆水利电力职业技术学院讲师,主要从事敏感材料及气体传感器的研究,lvchengcq@163.com。