NO and NO2 Sensing Properties of WO3 and Co3O4 Based Gas Sensors

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NO and NO2 Sensing Properties of WO3 and Co3O4 Based Gas Sensors

Semiconductor-based gas sensors that use n-type WO3 or p-type Co3O4 powder were fabricated and their gas sensing properties toward NO2 or NO (0.5-5 ppm in air) were investigated at 100 °C or 200 °C. The resistance of the WO3-based sensor increased on exposure to NO2 and NO. On the other hand, the resistance of the Co3O4-based sensor varied depending on the operating temperature and the gas spec...

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WO3 Nanorods/Graphene Nanocomposites for High-Efficiency Visible-Light-Driven Photocatalysis and NO2 Gas Sensing

Xiaoqiang An, Jimmy C. Yu,Yu Wang, Yongming Hu, Xuelian Yu and Guangjin Zhang a Department of Chemistry and Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China E-mail: [email protected] b Department of Applied Physics and Materials Research Center, The Hong Kong Polytechnic University, Hong Kong SAR, PR China c Inst...

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Gas Sensing Properties of the Adsorption of NO on WO3 Cubic Structures of Different Bond Lengths

Nitric oxide is a pollutant linked to the production of smog and acid rain in the environment. Due to the increase in production of nitric oxide, scientists have attempted to increase methods to detect the pollutant at low and high concentrations. Scientists have investigated gas sensors because of their low cost, sensitivity to gases at low concentrations, and fast response time. WO3 gas sensi...

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Sensing Properties of Pd-Loaded Co3O4 Film for a ppb-Level NO Gas Sensor

We prepared 0.1 wt%-30 wt% Pd-loaded Co3O4 by a colloidal mixing method and investigated the sensing properties of a Pd-loaded Co3O4 sensor element, such as the sensor response, 90% response time, 90% recovery time, and signal-to-noise (S/N) ratio, toward low nitric oxide (NO) gas levels in the range from 50 to 200 parts per billion. The structural properties of the Pd-loaded Co3O4 powder were ...

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ژورنال

عنوان ژورنال: Sensors

سال: 2013

ISSN: 1424-8220

DOI: 10.3390/s130912467