کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
750477 1462067 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nonaqueous synthesis of Ag-functionalized In2O3/ZnO nanocomposites for highly sensitive formaldehyde sensor
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Nonaqueous synthesis of Ag-functionalized In2O3/ZnO nanocomposites for highly sensitive formaldehyde sensor
چکیده انگلیسی


• Ag-functionalized In2O3/ZnO (IZO) nanocomposites were fabricated by a nonaqueous route.
• High nanocrystalline Ag-functionalized IZO shows highly sensitive for formaldehyde.
• The high sensing properties attribute to the unique structure of IZO nanocomposites.
• The approach could be expected to be extended for development of an excellent gas sensor.

In this work, Ag-functionalized In2O3/ZnO (IZO) nanocomposites with various contents were successfully fabricated by a nonaqueous route. The ZnO and In2O3 showed separated phases and different sizes deriving from the faster growth of ZnO than In2O3 using benzyl alcohol as the oxygen supplying agent. To demonstrate the usage of such Ag-functionalized IZO, the gas sensors have been fabricated and investigated for formaldehyde (HCHO) detection. The results reveal that the as-synthesized 3 wt% Ag-functionalized IZO samples exhibit high response of about 842.9 towards 2000 ppm HCHO at operating temperature of 300 °C. All sensors show rapid response and recovery. The highly sensing properties are attributed to the synergistic effects arising from the presence of these multiple functional materials, i.e. the special structure of IZO nanocomposites, the formation of the heterojunctions, the influence of Ag nanoparticles, and the mutual doping effect.

3 wt% Ag-functionalized In2O3/ZnO (IZO) nanocomposites synthesized by a nonaqueous route exhibits ultra-high sensitivity and a rapid response/recovery time towards formaldehyde gas, which attributed the unique structure of IZO nanocomposites, the formation of heterostructure between In2O3 and ZnO, the influence of Ag nanoparticles, and the mutual doping effect during In2O3 and ZnO growth.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 224, 1 March 2016, Pages 193–200
نویسندگان
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