Synthesis of Pd Doped SnO<sub>2</sub>/Graphene Composites and Its Gas Sensing Properties to CO

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Synthesis of Pd Doped SnO₂/Graphene Composites and Its Gas Sensing Properties to CO

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[1]GUO Meiyuan,CAO Chenlu,CAO Chunmei,et al.Synthesis of Pd Doped SnO2/Graphene Composites and Its Gas Sensing Properties to CO[J].Journal of Zhengzhou University (Engineering Science),2020,41(05):15-20.[doi:10.13705/j.issn.1671-6833.2019.05.021]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 41卷 Number of periods: 2020 05 Page number: 15-20 Column: Public date: 2020-10-01

Title:: Synthesis of Pd Doped SnO₂/Graphene Composites and Its Gas Sensing Properties to CO

Author(s):: GUO Meiyuan; CAO Chenlu; CAO Chunmei; LU Qifang; ZHAN Zili; GAO Jian; School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China

Keywords:: SnO2; nanoparticles; noble metal Pd; graphene; CO sensor

CLC:: -

DOI:: 10.13705/j.issn.1671-6833.2019.05.021

Abstract:: SnO2 nanoparticles doped with different amounts of graphene were prepared by precipitation and ultrasonic impregnation methods. Pd1.5%/SnO₂/Gx% composites were obtained by doping Pd using the impregnation method. The CO sensing properties of Pd1.5%/SnO₂/Gx% nanocomposites doped with graphene at different ratio of 0.1%, 0.25%, 0.5% and 0.75% (mass fraction) were studied. The results showed that graphene could improve the sensitivity of Pd1.5%/SnO₂/Gx% to CO by reducing the agglomeration and enhancing the dispersion of SnO₂ nanoparticles. So Pd1.5%/SnO₂/G0.25% had the excellent CO sensing properties. The optimum operating temperature was 75 ℃. When the CO concentration was 115 mg/m3, the gas response could reach 56.2 and response， recovery time was 7 s and 10 s, respectively. The sample Pd1.5%/SnO₂/G0.25% still had gas-sensing performance when the CO concentration was only 5.75 mg/m3.

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Last Update: 2020-10-23