Ultrasensitive low-temperature H_(2)S detection enabled by microwave-synthesized CuO/SnO_(2)/RGO composite nanosheets with abundant heterojunctionsOA
Hydrogen sulfide(H_(2)S)poses a significant threat to human health even at trace levels.Rapid and reliable H_(2)S detection with high sensitivity is of paramount importance.Herein,copper oxide and tin dioxide comodified reduced graphene oxide(CuO/SnO_(2)/RGO)composite nanosheets(CSRs)were synthesized via a one-step microwave-assisted method and used as functional sensing layers for H_(2)S detection.The composite consists of secondary CuO and SnO_(2)nanoparticles,grown in situ and uniformly anchored onto the reduced graphene oxide(RGO)surfaces.The 3-CSR composite with a Cu:Sn molar ratio of 3:7 has a particle size range from 6.3 to 25.1 nm with an average diameter of 11.8 nm.The formation mechanism stems from the initial coordination of Sn^(2+)and Cu^(2+)ions with the oxygencontaining functional groups on the graphene oxide(GO)surface.The CSR sensor demonstrates an exceptional sensing response to H_(2)S,which is significantly modulated by the Cu/Sn molar ratio.The optimized 3-CSR composite exhibits superior gas-sensing properties,achieving a remarkable response of 28,233 toward 50 ppm H_(2)S with an ultrafast response time of merely 2 s at a low operating temperature of 80℃.The enhanced performance is attributed to the synergistic effects of numerous p-n heterojunctions,together with the high RGO network,high specific surface area,and oxygen vacancy defects,which promote gas adsorption and charge transfer.
Li Yin;Kang Zhao;Mengxin Han;Wenpei Shi;Tengbiao Yu;Hui He;Bin Zhao;Bingbing Fan;Deliang Chen;Rui Zhang
Zhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices,College of Physics and Optoelectronic Engineering,Zhongyuan University of Technology,Zhengzhou 450007,ChinaZhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices,College of Physics and Optoelectronic Engineering,Zhongyuan University of Technology,Zhengzhou 450007,ChinaZhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices,College of Physics and Optoelectronic Engineering,Zhongyuan University of Technology,Zhengzhou 450007,ChinaZhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices,College of Physics and Optoelectronic Engineering,Zhongyuan University of Technology,Zhengzhou 450007,ChinaZhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices,College of Physics and Optoelectronic Engineering,Zhongyuan University of Technology,Zhengzhou 450007,ChinaCollege of Physics Science and Technology,Yangzhou University,Yangzhou 225009,ChinaZhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices,College of Physics and Optoelectronic Engineering,Zhongyuan University of Technology,Zhengzhou 450007,ChinaSchool of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China Institute of Advanced Ceramics,Henan Academy of Sciences,Zhengzhou 450046,ChinaSchool of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China School of Materials Science and Engineering,Dongguan University of Technology,Dongguan 523808,ChinaSchool of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China Institute of Advanced Ceramics,Henan Academy of Sciences,Zhengzhou 450046,China
通用工业技术
CuO/SnO_(2)graphenemicrowave-assisted synthesisheterojunctionH_(2)S sensing performance
《Journal of Advanced Ceramics》 2026 (5)
P.83-93,11
funded by the National Natural Science Foundation of China(Grant No.51602357)the Natural Science Foundation for Excellent Youth of Henan Province(No.212300410097)the Science and Technology Project of Henan Province(No.252102230131).
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