Sn掺杂MoO3的制备、 表征及气敏性能

doi:10.7503/cjcu20170470

高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (12): 2206.doi: 10.7503/cjcu20170470

Sn掺杂MoO₃的制备、表征及气敏性能

高海燕^1,²(), 王竞一¹, 赵永男¹, 陈昆峰³, 薛冬峰³

1. 天津工业大学材料科学与工程学院, 天津市先进纤维与储能技术重点实验室, 天津 300387
2. 南开大学先进能源材料化学教育部重点实验室, 天津 300071
3. 中国科学院长春应用化学研究所, 稀土资源利用国家重点实验室, 长春 130022

收稿日期:2017-07-17 出版日期:2017-12-10 发布日期:2017-11-22
作者简介:联系人简介: 高海燕, 女, 博士, 讲师, 主要从事储能材料与器件研究. E-mail: gaohaiyan@tjpu.edu.cn
基金资助:
天津工业大学创新创业训练计划项目、先进能源材料化学教育部重点实验室开放基金(批准号: 2015-32)和稀土国家重点实验室开放课题(批准号: RERU2016018)资助

Preparation,Characterization and Gas Sensing Properties of Sn Doped Mo $O 3 †$

GAO Haiyan^1,^2,^*(), WANG Jingyi¹, ZHAO Yongnan¹, CHEN Kunfeng³, XUE Dongfeng³

1. Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering,Tianjin Polytechnic University, Tianjin 300387, China
2. Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University, Tianjin 300071, China
3. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry,Chinese Academy of Sciences, Changchun 130022, China

Received:2017-07-17 Online:2017-12-10 Published:2017-11-22
Contact: GAO Haiyan E-mail:gaohaiyan@tjpu.edu.cn
Supported by:
Supported by the Innovation and Entrepreneurship Training Program of Tianjin Polytechnic University of China, the Foundation of Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education, China(No.2015-32) and the Open Project of State Key Laboratory of Rare Earth Resources Utilization, China(No;RERU2016018)

摘要/Abstract

摘要：

以仲钼酸铵和四氯化锡为原料, 采用水热法制备了不同Sn掺杂比例的MoO₃; 利用X射线衍射(XRD), 扫描电子显微镜(SEM)和Brunauer-Emmett Teller(BET)测试等手段对材料进行了物相、形貌结构和孔径表征; 测试了其对乙醇、二氯甲烷、甲醇、甲醛、甲酸、四氯化碳、氨气和丙酮等气体的传感性能. 结果表明, Sn掺杂未改变MoO₃的结构; 290 ℃为气体传感测试的最佳测试温度; 掺杂后的MoO₃对乙醇气体的灵敏度和响应时间均优于纯相MoO₃, Sn掺杂摩尔比为5%时效果最好, 500 mg/m³测试条件下对乙醇的灵敏度为19.64, 响应时间为1.1 s.

关键词: 三氧化钼, 锡掺杂, 气敏特性

Abstract:

Sn-doped MoO₃ were synthesized by a hydrothermal method, using ammonium paramolybdate and tin tetrachloride as raw materials. The structure, morphology and pore texture of the samples were characterized by means of X-ray diffraction(XRD), scanning electron microscope(SEM) and Brunauer-Emmett-Teller(BET). The gas sensing properties of ethanol, dichloromethane, methanol, formaldehyde, formic acid, carbon tetrachloride, ammonia and acetone were tested. The results show that Sn doping does not affect the structure of MoO₃ and the best heating temperature is 290 ℃. After Sn doping, the sensitivity is better than the pure MoO₃, and the response time is shorter. MoO₃ doped with 5%(molar ratio) Sn shows the best gas sensing properties, with a gas sensitivity of 19.64 and a rapid response time of 1.1 s in 500 mg/m³ of ethanol.

Key words: MoO₃, Sn doping, Gas sensing property

中图分类号:

TrendMD:

高海燕, 王竞一, 赵永男, 陈昆峰, 薛冬峰. Sn掺杂MoO₃的制备、表征及气敏性能. 高等学校化学学报, 2017, 38(12): 2206.

GAO Haiyan, WANG Jingyi, ZHAO Yongnan, CHEN Kunfeng, XUE Dongfeng. Preparation,Characterization and Gas Sensing Properties of Sn Doped Mo $O 3 †$ . Chem. J. Chinese Universities, 2017, 38(12): 2206.

图/表 7

Fig.1 XRD patterns of Sn-doped MoO3(A) and the amplify region of 24°—27° (B)Doped content of Sn: a. 0; b. 3%; c. 5%; d. 7%.

Fig.2 XPS spectra of Sn doped MoO3(A) Full spectra; (B) O1s; (C) Sn3d; (D) Mo3d.

Fig.3 SEM images of Sn doped MoO3(A) Undoped MoO3; (B)—(D) the Sn doped MoO3 with doped content of 3%, 5% and 7%, respectively.

Fig.4 N2 adsorption-desorption isotherms at 77 KDoped content of Sn: (A) 0; (B) 3%; (C) 5%; (D) 7%.

Fig.5 Sensitivity curves(A) and response characteristics curves(B) of samples at 500 mg/m3 of C2H5OH Doped content of Sn: a. 0; b. 3%; c. 5%; d. 7%.

Fig.6 Sensitivity curve(A) and response characteristics curve(B) of MoO3 doped with 5% Sn operated for 500 mg/m3 C2H5OH at 252, 257, 265, 278, 290, 305 and 315 ℃

Fig.7 Gas response of 5% Sn-doped MoO3 to 500 mg/m3 ethanol(a), dichloromethane(b), methanol(c), formaldehyde(d), formic acid(e), carbon tetrachloride(f), ammonia(g) and acetone(h) at a heating temperature of 290 ℃(A) and the selectivity to ethanol(B)Sethanol and Sgas represent gases response to ethanol and other gases, respectively.

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Sn掺杂MoO₃的制备、表征及气敏性能

Preparation,Characterization and Gas Sensing Properties of Sn Doped Mo $O 3 †$

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