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Development of Nano-SnO 2 and SnO 2 :V 2 O 5 Thin Films for Selective Gas Sensor Devices
Arabian Journal for Science and Engineering ( IF 2.9 ) Pub Date : 2020-07-08 , DOI: 10.1007/s13369-020-04735-9
Y. Ibrahim , A. B. Kashyout , I. Morsi , H. Shokry Hassan

Pure and doped SnO2 with V2O5 nanopowders were synthesized via sol–gel method using different V2O5 ratios. Novel thin films of SnO2:V2O5 were thermally vacuum deposited from the nanopowders and utilized for gas sensor devices to detect volatile organic compounds hazardous gases. The morphological and crystalline structure, textural properties, functional groups, optical properties and thermal behavior were investigated by FESEM, XRD, HRTEM, surface area BET, FTIR and UV–Visible spectroscopy, respectively, for both the nanopowders, and thin films. From XRD patterns, the average calculated crystallite sizes decreased from 7.8 nm to 4.5 nm as the V2O5 concentration was varied from 0 to 10%. FESEM and HRTEM show that all the synthesized nanomaterials composed of mesoporous networks of aggregated nanoparticles that almost spherical. Thus, V2O5 doped SnO2 nanopowders synthesized by sol–gel method exhibited the structural and textural features required to be used as an active area for gas sensor devices. The effect of various doping weight amounts (1, 5 and 10 wt%) of V2O5 as the dopant element enhanced the gas response time and sensitivity. The electrical behavior of the sensors was determined by measuring the resistance of two deposited platinum electrodes for sensor’s devices for different kinds of gases (LPG, H2, NH3 and acetone) at different temperatures.



中文翻译:

用于选择性气体传感器器件的纳米SnO 2和SnO 2:V 2 O 5薄膜的开发

通过溶胶-凝胶法,使用不同的V 2 O 5比例,合成了具有V 2 O 5纳米粉的纯净掺杂SnO 2。新型SnO 2薄膜:V 2 O 5从纳米粉末进行热真空沉积,然后将其用于气体传感器设备以检测挥发性有机化合物有害气体。分别通过FESEM,XRD,HRTEM,表面积BET,FTIR和UV-可见光谱法研究了纳米粉和薄膜的形态和晶体结构,结构性质,官能团,光学性质和热行为。根据XRD图,随着V 2 O 5浓度从0%变为10%,平均算出的微晶尺寸从7.8 nm减小到4.5 nm 。FESEM和HRTEM表明,所有合成的纳米材料均由几乎球形的聚集纳米颗粒的介孔网络组成。因此,掺杂了V 2 O 5的SnO 2通过溶胶-凝胶法合成的纳米粉具有结构和纹理特征,需要用作气体传感器设备的有效区域。各种掺杂量(1、5和10wt%)的V 2 O 5作为掺杂元素的效果增强了气体响应时间和灵敏度。传感器的电性能是通过在不同温度下测量传感器设备上用于不同种类气体(LPG,H 2,NH 3和丙酮)的两个沉积铂电极的电阻来确定的。

更新日期:2020-07-08
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