摘要
为了提升n型半导体金属氧化物ZnO的气敏特性,以二水合乙酸锌、四水合乙酸镍和聚乙烯吡咯烷酮为原料,N,N二甲基甲酰胺和无水乙醇为溶剂,采用静电纺丝法和煅烧工艺,构建了ZnO-NiO纳米纤维用于丙酮传感。结果表明:在工作温度为300℃时,ZnO-NiO(Zn与Ni物质的量比为12∶1)对质量浓度为50 mg/L丙酮传感响应(R_(a)/R_(g)=62)与纯ZnO相比,气敏度提高了8.1倍,并且表现出优异的选择性以及长期的稳定性。ZnO-NiO纳米纤维结构中的p-n异质结效应影响载流子传输特性,独特的管状纤维结构具有的较大比表面积,导致其对气体的吸附脱附能力增强。
In this paper,ZnO-NiO composite nanofibers are constructed for acetone sensing using zinc acetate dihydrate,nickel acetate tetrahydrate and polyvinylpyrrolidone as raw materials,N,N dimethylformamide and anhydrous ethanol as solvents by electrostatic spinning method and calcination.The results show that the ZnO-NiO composite nanofibers(molar ratio Zn∶Ni=12∶1)exhibit a 8.1-fold increase in sensitivity(R_(a)/R_(g)=62)to 50 mg/L acetone compared to pure ZnO at an operating temperature of 300℃,and exhibit excellent selectivity and long-term stability.The enhanced gas-sensitive performance of ZnO-NiO composites is attributed to the carrier transport properties due to the p-n heterojunction effect and the enhanced adsorption-desorption capability of the composites due to the large specific surface area caused by the unique tubular fiber structure.
作者
赵慧怡
刘雪梅
韦启铭
李子萱
孙丽霞
孙建华
ZHAO Huiyi;LIU Xuemei;WEI Qiming;LI Zixuan;SUN Lixia;SUN Jianhua(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology,Nanning 530004,China)
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2023年第5期1237-1246,共10页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金项目(22165001,52002088)
广西自然科学基金项目(2018GXNSFAA294001)
广西创新驱动发展专项(桂科AA19254022)
崇左市科技项目(FA2020003)。
