[1]李娜,向群,程知萱,等.多孔SnO2空心球的合成及甲醛气敏性能研究[J].郑州大学学报(工学版),2019,40(06):27-31.
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多孔SnO2空心球的合成及甲醛气敏性能研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
40
期数:
2019年06期
页码:
27-31
栏目:
出版日期:
2019-11-16

文章信息/Info

Title:
Synthesis of Porous SnO2 Hollow Sphere and Gas Sensing Properties of Formaldehyde
作者:
李娜;向群;程知萱;王晓红;徐甲强
文献标志码:
A
摘要:
针对目前气敏材料制备工艺繁琐且对甲醛灵敏度不高的现状,本文主要通过调控乙醇与水的配比制备合成了多孔SnO2空心球材料并用于低浓度甲醛的检测,通过XRD,SEM以及TEM等测试仪器对材料的结构和形貌进行了表征.当乙醇与水的体积比为3.0:5.0时,制备得到的多孔SnO2空心球生长均匀,直径约为400 nm.气敏测试结果表明:SnO2空心球材料的最佳工作温度为210℃,对50 mg/L甲醛的响应值可达到52.5,响应和恢复时间分别为14 s和33 s,并且对其他气体的响应值较低.文中还对该材料在甲醛浓度范围为1-50 mg/L时进行了连续测试,计算得到最低检测限低至20 ug/L,表明其可用于低浓度甲醛的检测.
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.
更新日期/Last Update: 2019-11-25