首页|Unlocking Co3O4-ZnO p-n heterojunction for superior acetone gas sensing detection

Unlocking Co3O4-ZnO p-n heterojunction for superior acetone gas sensing detection

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In this study,we synthesized pure ZnO and Co3O4-ZnO precursors with varied Co,Zn ratios via solvothermal method,and then the precursors were calcined at 400 ℃ for 2 h in a muffle furnace under air to obtain composites for acetone detection.The structure,morphology,elemental composition,microstructure and chemical state of these materials were systematically studied by various characterization techniques.Additionally,we also eval-uated the gas sensing performance of the composites-based sensors,focusing on optimal operating temperature,baseline resistance,repeatability,stability,selectivity,response/recovery time,and resistance under varying relative humidity.The findings reveal that 3％Co3O4-ZnO-based sensor exhibit the highest response value to 100 ppm acetone(74),showing an enhancement of approximately 9.3 times compared to the pure ZnO-based sensor(8).Furthermore,the 3％Co3O4-ZnO-based sensor demonstrate the advantages of rapid response/re-covery times(15 s/2 s),outstanding selectivity,and remarkable stability.The gas sensing mechanism of the composite material is also discussed in detail,which provides insights into the observed enhancement of gas sensing performance.It provides an idea for the follow-up study on gas sensing performance of acetone sensors.

HeterojunctionAcetoneCo3O4-ZnOGas sensingSolvothermal method

Xingxing Liu、Tingting Shao、Juntang Dong、Huirong Kou、Fuchun Zhang、Yuyang Cheng、Jiaming Guo、Shuwei Tian、Kuldeep K.Saxena、Xinghui Liu

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School of Physics and Electronic Information,Yan'an University,Yan'an,716000,China

Division of Research and Development,Lovely Professional University,Phagwara,India

Science and Technology on Aerospace Chemical Power Laboratory,Laboratory of Emergency Safety and Rescue Technology,Hubei Institute of Aerospace Chemotechnology,Xiangyang,441003,China

Department of Materials Physics,Saveetha School of Engineering,Saveetha Institute of Medical and Technical Sciences(SIMTS),Thandalam,Chennai,602105,Tamilnadu,India

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2024

10.1016/j.pnsc.2024.07.014

自然科学进展·国际材料(英文)
国家自然科学基金委员会

自然科学进展·国际材料(英文)

影响因子：0.25
ISSN：1002-0071
年,卷(期)：2024.34(5)