合成条件对非水解溶胶-凝胶法制备的WO₃多孔薄膜微观结构及NO₂传感性能的影响

Influence of Synthesis Conditions on Microstructure and NO₂ Sensing Properties of WO₃ Porous Films Synthesized by Non-Hydrolytic Sol⁻Gel Method.

作者信息

Zhao Sikai, Shen Yanbai, Zhou Pengfei, Li Guodong, Han Cong, Wei Dezhou, Zhong Xiangxi, Zhang Yunhai, Ao Yuxin

机构信息

School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China.

State Key Laboratory of Mineral Processing, Beijing, 102628, China.

出版信息

Nanomaterials (Basel). 2018 Dec 21;9(1):8. doi: 10.3390/nano9010008.

DOI:10.3390/nano9010008

PMID:30577653

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6359434/

Abstract

Nanostructured tungsten trioxide porous films were prepared by a non-hydrolytic sol⁻gel method following the inorganic route in which ethanol and PEG were used as the oxygen-donor and structure-directing reagent, respectively. The effects of aging time of the precursor solution, PEG content, and calcination temperature on the structure, morphology, and NO₂ sensing properties of WO₃ films were systematically investigated by using the techniques of X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and gas sensing measurements. The results demonstrated that a series of WO₃ films with different microstructures could be obtained by manipulating the synthesis parameters. Furthermore, a suitable synthesis condition of WO₃ films for NO₂ sensing application was determined.

摘要

采用非水解溶胶-凝胶法，按照无机路线制备了纳米结构的三氧化钨多孔薄膜，其中分别使用乙醇和聚乙二醇作为氧供体和结构导向剂。通过X射线衍射、场发射扫描电子显微镜、透射电子显微镜和气体传感测量等技术，系统研究了前驱体溶液的老化时间、聚乙二醇含量和煅烧温度对WO₃薄膜的结构、形貌和NO₂传感性能的影响。结果表明，通过控制合成参数可以获得一系列具有不同微观结构的WO₃薄膜。此外，还确定了适用于NO₂传感应用的WO₃薄膜的合成条件。