贯通有序大孔SnO2气敏材料的制备及气敏性能

CHEMICAL INDUSTRY AND ENGINEERING PROGRESS 2016年第35卷第11期 ·3570· 化 工 进 展

贯通有序大孔SnO 2气敏材料的制备及气敏性能

王莹,王晓冬,许亚威,周利星,魏莹,仪桂云

(河南理工大学材料科学与工程学院,环境友好型无机材料河南省高校重点实验室培育基地,河南

焦作 454000)

摘要:以聚苯乙烯(PS )微球为模板,氧化锡(SnO 2)纳米晶为骨架,采用颗粒模板法成功制备了贯通有序大孔SnO 2气敏材料。改变PS 微球的粒径,可以调节大孔SnO 2气敏材料的大孔孔径,本文以平均粒径约284nm 和356nm 的PS 微球制备了大孔孔径分别约为200nm 和260nm 的贯通有序大孔SnO 2气敏材料。对制备的样品进行了热重、X 射线衍射、扫描电子显微镜和氮气吸附脱附分析。结果表明:大孔排列高度有序,孔道贯通,孔壁由SnO 2纳米晶构成。制备的大孔SnO 2气敏材料不仅具备大孔-介孔-微孔结构,而且具有大的比表面积,具备优异的气敏性能。气敏测试结果表明孔径为200nm 和260nm 的贯通有序大孔SnO 2在280℃的工作温度下对300μL/L 的乙醇气体的灵敏度为145、245,分别是无大孔SnO 2纳米晶的2.2倍、3.7倍。

关键词:二氧化锡;纳米材料;气敏材料;粒子;有序大孔;水热

中图分类号:TQ 17 文献标志码:A 文章编号:1000–6613(2016)11–3570–06

DOI :10.16085/j.issn.1000-6613.2016.11.028

Preparation of interconnected ordered macroporous SnO 2 gas-sensing

material with enhanced gas-sensing properties

WANG Ying ,WANG Xiaodong ,XU Yawei ,ZHOU Lixing ,WEI Ying ,YI Guiyun

(Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province ,School of Materials Science and Engineering ,Henan Polytechnic University ,Jiaozuo 454000,Henan ,China ) Abstract :Interconnected ordered macroporous SnO 2 were prepared via template method by utilizing polystyrene (PS )microspheres as template and SnO 2 nanocrystals as framework. The pore size of the macropores can be controlled by changing the diameter of PS microspheres. Macroporous SnO 2 with average pore sizes of 200nm and 260nm were prepared via PS microspheres with the diameters of 284nm and 356nm ,respectively. The as-prepared samples were characterized by thermogravimetric analysis ,scanning electron microscope (SEM ),X-ray diffraction (XRD ),and Nitrogen adsorption-desorption analysis. The as-prepared samples are consist of ordered macropores ,interconnected nanopores ,and SnO 2 nanocrystals. The as-prepared sample possess macro-/meso-/micro-structure with large surface area ,which is beneficial for gas-sensing. The responses of macroporous SnO 2 with average pore size of 200nm and 260nm towards 300μL/L ethanol vapor at 280℃ are 145 and 245 respectively ,which are 2.2 and 3.7 times higher than that of SnO 2 nanocrystals.

Key words :stannic oxide (SnO 2)

;nanomaterials ;gas-sensing materials ;particle ;ordered macroporous ; hydrothermal

科研项目计划(15A430027,13A430315)。 第一作者:王莹(1990—),女,硕士研究生。联系人:王晓冬,博士,副教授。E-mail wangxd0863@https://www.360docs.net/doc/e59002197.html, 。 收稿日期:2016-03-03;修改稿日期:2016-05-08。 基金项目:国家自然科学基金(51404097,60877028,51172065,51504083,U1404613)、河南省科技攻关项目(132102210251)、高等

教育博士后基金项目专项(20124116120002)及河南省高等学校重点

万方数据

相关文档
最新文档