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아미노산을 이용한 망간 산화물 기공성 나노 구조의 합성 및 C_3H_8 가스에 대한 선택적 감응 특성

Preparation of Manganese Oxide Porous Nanostructures using Amino-acid and its Selective C_3H_8 Sensing Properties

이종흔|최권일
한국센서학회|2011.01|센서학회지 (Journal of Sensor Science and Technology)|제20권 제1호|pp. 64-69

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참고문헌

키워드

Manganese oxideSelectivityGas sensorsC_3H_8
주제분류공학일반

초록

Porous manganese oxide porous nanostructures were prepared by amino-acid-mediated solvothermal self assembly reaction and subsequent heat treatment at 600℃. When Mn-precursors were heat-treated at 400 - 550℃, the sensors did not show significant gas responses. In contrast, the manganese oxide heat-treated at 600℃ showed the significant gas responses, that is, the resistance decrease to 100 ppm C_3H_8 (R_a/R_g = 2.17, R_a : resistance in air, R_g : resistance in gas) and the resistance increase to 100 ppm C_2H_5OH (R_g/R_a = 1.92). The opposite change of resistance upon exposure to C_3H_8 and C_2H_5OH was discussed in relation to the mixed phases of manganese oxides with different valences.

Abstract

Porous manganese oxide porous nanostructures were prepared by amino-acid-mediated solvothermal self assembly reaction and subsequent heat treatment at 600℃. When Mn-precursors were heat-treated at 400 - 550℃, the sensors did not show significant gas responses. In contrast, the manganese oxide heat-treated at 600℃ showed the significant gas responses, that is, the resistance decrease to 100 ppm C_3H_8 (R_a/R_g = 2.17, R_a : resistance in air, R_g : resistance in gas) and the resistance increase to 100 ppm C_2H_5OH (R_g/R_a = 1.92). The opposite change of resistance upon exposure to C_3H_8 and C_2H_5OH was discussed in relation to the mixed phases of manganese oxides with different valences.

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