Scholarlink

<p>This study investigates the structural, morphological, and gas-sensing properties of SnO<sub>2</sub> and Zn<sub>2</sub>SnO<sub>4</sub> thin films synthesized via magnetron-assisted physical vapor deposition (PVD-RMS). The samples analyzed were SnO<sub>2</sub>-R.T., SnO<sub>2</sub>−500&#xa0;℃, Zn<sub>2</sub>SnO<sub>4</sub>-R.T., and Zn<sub>2</sub>SnO<sub>4</sub>−500&#xa0;℃. X-ray diffraction (XRD) results indicated that SnO<sub>2</sub>-R.T. is likely amorphous, whereas the remaining samples exhibited crystalline structures. Fourier transform infrared spectroscopy (FTIR) confirmed the formation of zinc stannate (Zn<sub>2</sub>SnO<sub>4</sub>) through Sn–O-Sn and Zn–O-Sn bonds. Scanning electron microscopy (SEM) revealed that Zn<sub>2</sub>SnO<sub>4</sub> films had greater roughness and porosity compared to SnO<sub>2</sub>, with film thicknesses ranging from 250 to 300&#xa0;nm for SnO<sub>2</sub> and 500–600&#xa0;nm for Zn<sub>2</sub>SnO<sub>4</sub>. These differences were attributed to thermal treatments and calcination processes, which influenced particle size, distribution, and agglomeration. Gas-sensing tests conducted at CO concentrations of 50, 100, and 166&#xa0;ppm showed that Zn<sub>2</sub>SnO<sub>4</sub>−500&#xa0;℃ demonstrated higher sensitivity and selectivity due to its smaller particle size, rougher surface, and uniform particle distribution. This study highlights the potential of Zn<sub>2</sub>SnO<sub>4</sub> thin films, particularly those treated at room temperature, for detecting low concentrations of CO in gas-sensing applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

CO Gas sensing properties of Zn2SnO4 thin films

  • 期刊论文

  • 发表日期：

    2025年6月14日

查看全文
  • Kevin Rueda Castellanos,
  • Brenda García Farrera,
  • María de la Luz Olvera Amador,
  • Venkata Krishna Karthik Tangirala

摘要

This study investigates the structural, morphological, and gas-sensing properties of SnO2 and Zn2SnO4 thin films synthesized via magnetron-assisted physical vapor deposition (PVD-RMS). The samples analyzed were SnO2-R.T., SnO2−500 ℃, Zn2SnO4-R.T., and Zn2SnO4−500 ℃. X-ray diffraction (XRD) results indicated that SnO2-R.T. is likely amorphous, whereas the remaining samples exhibited crystalline structures. Fourier transform infrared spectroscopy (FTIR) confirmed the formation of zinc stannate (Zn2SnO4) through Sn–O-Sn and Zn–O-Sn bonds. Scanning electron microscopy (SEM) revealed that Zn2SnO4 films had greater roughness and porosity compared to SnO2, with film thicknesses ranging from 250 to 300 nm for SnO2 and 500–600 nm for Zn2SnO4. These differences were attributed to thermal treatments and calcination processes, which influenced particle size, distribution, and agglomeration. Gas-sensing tests conducted at CO concentrations of 50, 100, and 166 ppm showed that Zn2SnO4−500 ℃ demonstrated higher sensitivity and selectivity due to its smaller particle size, rougher surface, and uniform particle distribution. This study highlights the potential of Zn2SnO4 thin films, particularly those treated at room temperature, for detecting low concentrations of CO in gas-sensing applications.