摘要
采用模板法成功制备了具有介孔结构的毛线团状In_(2)O_(3)空心球,该空心球具有大的比表面积(30.88 m^(2)/g),并研究了苯二甲酸的种类对产物形貌、结构和气敏性能的影响。利用XRD、TEM、FT-IR、DSC-TG和氮气物理吸附对所合成的产物进行表征。结果表明苯二甲酸的种类对最终产物的形貌有显著影响。气敏性分析表明,与其他In_(2)O_(3)及其体状材料相比,基于毛线团状In_(2)O_(3)空心球的传感器对乙醇表现出优异的气敏性能。用对苯二甲酸所合成的In_(2)O_(3)空心球在工作温度为280℃时对100 ppm乙醇的响应值约为28,是In_(2)O_(3)体状材料的3倍以上。该传感器对10 ppm的乙醇也有着高的气敏响应值(约为3.6),其能够检测到环境中的低浓度乙醇气体。其响应与恢复时间分别为16s和39s,具有快速响应和恢复的特性。此外,该传感器在30 d的稳定性测试后响应值还能达到初始值的91%,表明毛线团状In_(2)O_(3)空心球在检测乙醇气体方面具有优异的气敏稳定性能。
Yarn ball-like In_(2)O_(3) hollow spheres with mesoporous structure are successfully prepared by using the template method,which has a large specific surface area(30.88 m^(2)/g).The effects of the type of benzoic acid on the morphology,structure and gas sensitivity of the final products are studied.The as-synthesized samples are characterized by XRD,TEM,FTIR,DSC-TG and N_(2) physisorption.It is found that the type of benzoic acid has an obvious influence on the morphology of the final products.The gas sensing results show that the sensor based on yarn ball-like In_(2)O_(3) hollow sphere show excellent gas sensing performance to ethanol compared with other In_(2)O_(3) and its bulk.The response value of the In_(2)O_(3) hollow sphere synthesized by using terephthalic acid is about 28 to the 100 ppm ethanol at 280℃,which is more than 3 times of that of the In_(2)O_(3) bulk.The sensor also has a high gas sensitivity response value of 3.6 to 10 ppm ethanol,which can detect low-concentration ethanol gas in the environment.Its response and recovery time are 16 s and 39 s,respectively,showing fast response and recovery characteristics.Moreover,its gas sensitivity response value can reach 91%of the initial value after 30 days of stability test,indicating that the gas sensor has excellent gas sensitivity stability in detecting ethanol gas.
作者
陈兴宽
王红
张强
刘小华
曾智鹏
付月豪
CHEN Xingkuan;WANG Hong;ZHANG Qiang;LIU Xiaohua;ZENG Zhipeng;FU Yuehao(School of Materials Science and Engineering,Sichuan University of Science&Engineering,Zigong 643000,China;Material Corrosion and Protection Key Laboratory of Sichuan Province,Zigong 643000,China)
出处
《四川轻化工大学学报（自然科学版）》
CAS
2022年第2期1-7,共7页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
基金
国家自然科学基金项目(51672138)。
