Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (49권1호 69-74)

Improved Ethanol Gas Sensing Performance of α-Fe2O3 Nanoparticles by the Addition of NiO Nanoparticles

NiO의 첨가에 따른 α-Fe2O3 나노입자 센서의 에탄올 가스 검출 특성 향상

박성훈;강우승;
Park, Sunghoon;Kang, Wooseung;

인하대학교 신소재공학과;인하공업전문대학 금속재료과;
Department of Materials Science & Engineering, Inha University;Department of Metallurgical & Materials Engineering, Inha Technical College;

DOI : 10.5695/JKISE.2016.49.1.69

Abstract

In order to investigate the effect of NiO on the ethanol gas sensing performance of ${alpha}-Fe_2O_3$ nanoparticles, NiO and ${alpha}-Fe_2O_3$ nanoparticles are synthesized by hydrothermal method. The sensor with ${alpha}-Fe_2O_3$ and NiO nanoparticles mixed at an optimum ratio of 7:3 showed 3.8 times improved sensing performance for 200ppm ethanol gas at $200^{circ}C$. The enhanced gas sensing performance can be considered to be caused by pn heterojunction at the grain boundaries of ${alpha}-Fe_2O_3$ and NiO nanopartcles.

Keywords

${alpha}-Fe_2O_3$;NiO;Nanoparticles;Ethanol;Gas sensor;