Preparation,Characterization and Gas Sensing Properties of Sn Doped MoO3†

doi:10.7503/cjcu20170470

Abstract

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

CLC Number:

TrendMD:

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

Figures/Tables 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.

References 26

[1]	Bztzill M., Sensors, 2006, 6(10), 1345—1366
[2]	Park J. Y., Choi S. W., Lee J. W., J. Am. Ceram. Soc., 2009, 92(11), 2551—2554
[3]	Deng X. L., Zhang L. L., Guo J., Chen Q. J., Ma J. M., Mater. Res. Bull., 2017, 90, 170—174
[4]	Wang M., Li X. W., Shao C. L., Zhao Y. Q., Xin J. Y., Han Z. H., Li X. H., Liu Y. C., Chem. J. Chinese Universities, 2017, 38(9), 1524—1530
	(王茉, 李晓伟, 邵长路, 赵英倩, 辛佳玉, 韩朝翰, 李兴华, 刘益春. 高等学校化学学报, 2017, 38(9), 1524—1530)
[5]	Xu J. B., Wang W., Wang C., Chem. J. Chinese Universities, 2017, 38(6), 942—946
	(许金宝, 王威, 王策. 高等学校化学学报, 2017, 38(6), 942—946)
[6]	Fan K., Guo J., Cha L. M., Chen Q. J., Ma J. M., J. Alloys. Comp., 2017, 698(0), 336—340
[7]	Jiang J. B., Liu J. L., Peng S. J., Qian D., Luo D. M., Wang Q. F., Tian Z. W., Liu Y. C., J. Mater. Chem. A, 2013, 1(0), 2588—2594
[8]	Chen D. L., Liu M. N., Yin L., Li T., Yang Z., Li X. J., Fan B. B., Wang H. L., Zhang R., Li Z. X., Xu H. L., Lu H. X., Yang D. Y., Sun J., Gao L., J. Mater. Chem., 2011, 21(25), 9332—9342
[9]	Gao H. Y., Peng W. X., Wei X., Qi Z., Zhao Q. Q., Yang J. Q., Jiao L. F., Si Y. C., Yuan H. T., Acta Sci. Nat. University Nankaiensis,2010, 43(5), 72—77
	(高海燕, 彭文修, 魏欣, 亓瞻, 赵倩倩, 杨加芹, 焦丽芳, 司玉昌, 袁华堂. 南开大学学报(自然科学版), 2010, 43(5), 72—77)
[10]	Pandeeswari R., Jeyaprakash B. G., Biosens. Bioelectron., 2014, 53, 182—186
[11]	Chu X. F., Liang S. M., Sun W. Q., Zhang W. B., Chen T. Y., Zhang Q. F., Sens. Actuators B, 2010, 148(2), 399—403
[12]	Prasad A. K., Kubinski D. J., Gouma P. I., Sens. Actuators B, 2003, 93(1—3), 25—30
[13]	Ouyang Q. Y., Li L., Wang Q. S., Zhang Y., Wang T. S., Meng F. N., Chen Y. J., Gao P., Sens. Actuators B, 2012, 169, 17—25
[14]	Bai S. L., Chen S., Chen L. Y., Zhang K. W., Luo R. X., Li D. Q., Liu C. C., Sens. Actuators B, 2012, 174, 51—58
[15]	Barazzouk S., Tandon R. P., Hotchandani S., Sens. Actuators B, 2006, 119(2), 691—694
[16]	Yang S., Liu Y. L., Chen W., Jin W., Zhou J., Zhang H., Zakharova G. S., Sens. Actuators B, 2016, 226, 478—485
[17]	Khojier K., Savaloni H., Zolghadr S., Appl. Surf. Sci., 2014, 320, 315—321
[18]	Xing L. J., Chang Y. Q., Shao C. J., Wang L., Long Y., Acta Phys. Sin., 2016, 65(9), 097302
	(刑兰俊, 常永勤, 邵长景, 王琳, 龙毅. 物理学报, 2016, 65(9), 097302)
[19]	Bouzid A., Benramdane N., Tabet-derraz H.,Mathieu C., Khelifa B., Desfeux R., Mater.Sci.Eng.B,2003, 97(1), 5—8
[20]	Li Y. Q., Liu T. M., Peng X. H., Mater. Letters, 2015, 140, 48—50
[21]	Lin S. Y., Wang C. M., Kao K. S., Chen Y. C., Liu C. C., J. Sol-Gel Sci. Technol., 2010, 53(1), 51—58
[22]	Choi K. I., Kim H. J., Kang Y. C., Lee J. H., Sens. Actuators B, 2014, 194, 371—376
[23]	Cheng L., Ma S. Y., Li X. B., Luo J., Li W. Q., Li F. M., Mao Y. Z., Wang T. T., Li Y. F., Sens. Actuators B, 2014, 200, 181—190
[24]	Chen T., Liu Q. J., Zhou Z. L., Wang Y. D., Sens. Actuators B, 2008, 131(1), 301—305
[25]	Tiemann M.,Chem. Eur. J., 2007, 13(30), 8366—8388
[26]	Spencer M. J. S., Prog. Mater. Sci., 2012, 57, 437—486