메조세공을 갖는 이산화 주석의 합성 및 가스센서로서의 응용

김남현; 김건중; Nam-Hyon Kim; Geon-Joong Kim

Journal of the Korean Industrial and Engineering Chemistry, Vol.18, No.2, 142-147, April, 2007

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메조세공을 갖는 이산화 주석의 합성 및 가스센서로서의 응용

Synthesis of Mesoporous Tin Oxide and Its Application as a Gas Sensor

김남현, 김건중 ^†

인하대학교 생명화학공학부

Nam-Hyon Kim, and Geon-Joong Kim^†

Department of Chemical Engineering, Inha University, Incheon 402-751, Korea

E-mail:

초록

본 연구에서는 주형물질로 C16TMABr을 이용하여 염기 조건하에서 메조세공을 갖는 산화주석을 졸-겔법으로 합성하였다. 메조세공 SnO2의 합성 최적조건을 탐사하였으며, 얻어진 시료는 X선회절, 질소흡착 및 투과전자현미경 등으로 분석하여 특성을 조사하였다. 금전극과 백금히터 회로를 알루미나 기재상에 스크린 프린팅 법으로 코팅하고, 합성한 메조세공의 산화주석을 전극상에 접합시켜 하나의 유니트로 구성하였으며, 제작한 센서는 350 ℃에서 1∼10,000 ppm 농도범위의 메탄과 일산화탄소에 대하여 검지능력을 평가하였다. SnO2 상에 담지된 팔라듐량의 변화가 이들 측정가스의 검출에 미치는 영향도 검토하였다. 메조세공을 갖는 산화주석은 비다공성의 상용 산화주석에 비하여 동일한 측정 조건하에서 측정가스에 대해 보다 높은 감도를 나타낼 뿐 아니라 안정성이 있으면서도 빠른 응답속도를 보였다.

In this study, mesoporous tin oxide was synthesized by sol-gel method using C16TMABr surfactant as a template in a basic condition. The optimum conditions for the synthesis of mesoporous SnO2 were investigated and the obtained samples were characterized by XRD, nitrogen adsorption and TEM analysis. A mesoporous and nanostructured SnO2 gas sensor with Au electrode and Pt heater has been fabricated on alumina substrate as one unit via a screen printing process. Sensing abilities of fabricated sensors were examined for CO and CH4 gases, respectively, at 350 ℃ in the concentration range of 1∼10,000 ppm. Influence of loading amount of palladium impregnated on SnO2 was also tested in detection of those gases. High sensitivity to detecting gases and the fast response speed with stability were obtained with the mesoporous tin oxide sensor as compared to a non-porous one under the same detection conditions.

Keywords:mesoporous tin oxide;gas sensor;palladium;sensitivity

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[Related Articles]

[1] Lee DD, Chemical Sensors Technology, 1, 79 (1994)

[2] Lee DD, Chung WY, Sohn BK, Sens. Actuators B-Chem., 13, 242 (1993)

[3] Pitchai R, Klier K, Catal. Rev.-Sci. Eng., 28, 13 (1986)

[4] Hicks RF, Qi H, Young ML, Lee RG, J. Catal., 122, 280 (1990)

[5] Hicks RF,Qi H, Young ML, Lee RG, J. Catal., 122, 295 (1990)

[6] Ribeiro FH, Chow M, Betta RAD, J. Catal., 146, 537 (1994)

[7] Burch R, Urbano FJ, Loader PK, Appl. Catal., 123, 173 (1995)

[8] Yang P, Zhao D, Margolose DI, Chmelka BF, Stucky GD, Nature, 396, 152 (1998)

[9] Kim CK, Kim JG, Yoo KS, Choi YI, Han DY, Journal of Korean Association of Crystal Growth, 6, 213 (1996)

[10] Choi SM, Lee SH, Choi SC, Journal of Korean Association Crystal Growth, 9, 280 (1999)

[11] Sohn JR, Park HD, Korean J. Chem. Eng., 14(6), 469 (1997)

[12] Jun HK, Kim JC, Journal of the Korean Institute of Chemical Engineers, 35, 307 (1997)

[13] Carotta MC, Martinelli G, Crema L, Gallana M, Merli M, Ghiotti G, Traversa E, Sens. Actuators B-Chem., 68, 1 (2000)

[14] Hyodo T, Nishida N, Shimizu Y, Egashira M, Sens. Actuators B-Chem., 83, 209 (2002)

[15] Wang T, Ma Z, Xu F, Jiang Z, Electrochem. Commun., 5, 599 (2003)

[16] 홍성철, 서울시립대학교 석사학위논문 (2003)