复合软模板诱导的In(OH)_(3)/In_(2)O_(3)中空微球合成及QCM气敏性能研究  

Synthesis of In(OH)_(3)/In_(2)O_(3) hollow microspheres induced by a composite soft template and investigation of its QCM gas sensitive performance

作　　者：范国康[1] 孙秋阳 沈明[1] 李维政 叶明理 Fan Guo-kang;Sun Qiu-yang;Shen Ming;Li Wei-zheng;Yei Ming-li(College of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225002,China)

机构地区：[1]扬州大学化学化工学院,江苏扬州225002

出　　处：《化学传感器》2019年第4期39-49,共11页Chemical Sensors

基　　金：国家自然科学基金资助项目(21273194、21673201);江苏高校优势学科建设工程资助项目;江苏省高校自然科学研究面上项目(No.16KJD150003)。

摘　　要：采用PEG4000和DL-天冬氨酸在水介质中形成的分子自组装结构作为复合软模板,以In(NO_(3))_(3)为铟源、尿素为碱源,通过简单的常压回流法成功合成出了形貌均一的由纳米颗粒堆砌而成的In(OH)_(3)中空微球。研究发现,适量的DL-天冬氨酸与PEG4000复配在In(OH)_(3)中空微球的形成中起到了重要作用,同时随着回流时间的延长,中空微球体的均一化程度提高。In(OH)_(3)中空微球经450℃煅烧3 h后即转变为In_(2)O_(3),粒子具有良好的形貌继承性。以In_(2)O_(3)中空微球敏感膜制备的石英晶体微天平(QCM)传感器对100 ppm H_(2)的气敏响应频率达到180 Hz,且对H_(2)具有较好的选择性,在12.5~100 ppm浓度范围内,其响应与浓度之间呈现良好的线性关系,并且在30 d的连续测定中显示出很好的稳定性。In(OH)_(3) hollow microspheres piled up by nanoparticles with uniform morphology were synthesized through simple reflux method at atmospheric pressure,in which the molecular self-assembly structure of PEG4000 and DL-aspartic acid molecules were used as a composite soft template,In(NO_(3))_(3) as an indium source and urea as an alkali source in water medium.It was found that the synergism of DL-aspartic acid with proper amount and PEG4000 played an important role in the formation of hollow In(OH)_(3) microspheres,and the degree of homogenization of hollow microspheres increased with the increase of reflux time.After calcining at 450℃ for 3 h,the hollow microspheres of In(OH)_(3) were transformed into In_(2)O_(3),and the particles had good morphology inheritance.The gas sensitive response frequency of the quartz crystal microbalance(QCM)sensor prepared by In_(2)O_(3) hollow microspheres to 100 ppm H_(2) up to 180 Hz,and it has a good selectivity to H_(2).The linear relationship between the response frequency and the concentration of H2 is from 12.5 to 100 ppm.And the results of continuous determination showed that the QCM sensor possessed an excellent stability during 30 days.

关 键 词：复合软模板 In(OH)_(3)/In_(2)O_(3) 中空微球 石英晶体微天平(QCM) 气敏性能 

分 类 号：TB383.1[一般工业技术—材料科学与工程]