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Synthesis of Porous SnO2 Hollow Sphere and Gas Sensing Properties of Formaldehyde
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[1]Li Na,Xiang Qun,Cheng Zhixuan,et al.Synthesis of Porous SnO2 Hollow Sphere and Gas Sensing Properties of Formaldehyde[J].Journal of Zhengzhou University (Engineering Science),2019,40(06):27-31.[doi:10.13705/j.issn.1671-6833.2019.06.004]
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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 40 Number of periods: 2019 06 Page number: 27-31 Column: Public date: 2019-11-16
Title:
Synthesis of Porous SnO2 Hollow Sphere and Gas Sensing Properties of Formaldehyde
Author(s):
Li Na 1; 2; Xiang Qun1; Cheng Zhixuan 1; Wang Xiaohong 1; Xu Jiaqiang 1
1. Department of Chemistry, College of Science, Shanghai University; 2. Department of Basic Teaching, Shanghai Civil Aviation Vocational and Technical College
Keywords:
formaldehyde; hollow ball; Porous; SnO2; gas sensor
CLC:
TP212.2
DOI:
10.13705/j.issn.1671-6833.2019.06.004
Abstract:
In view of the current cumbersome preparation process and the low sensitivity to formaldehyde of gas sensing materials, this paper mainly prepares synthetic porous SnO2 hollow sphere materials by using the ratio of ethanol to water and use it to detect the low concentration formaldehyde. The structure and morphology of the materials were characterized by XRD, SEM and TEM. When the volume ratio of ethanol to water is 3.0:5.0, the prepared porous SnO2 hollow spheres grow uniformly and have a diameter of about 400 nm. The gas sensitivity test results show that the optimum operating temperature of SnO2 hollow sphere material is 210℃, the response value to 50 mg/L formaldehyde can reach 52.5, the response and recovery time are 14 s and 33 s, and the response value to other gases is lower. The material was also tested continuously in the range of formaldehyde concentration range of 1-50 mg/L, the lowest detection limit was calculated to be as low as 20 ug/L, indicating that it can be used for the detection of low concentration formaldehyde.
References:
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Last Update: 2019-11-25
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