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<p>A g-C<sub>3</sub>N<sub>4</sub>-SnO<sub>2</sub> composite was prepared with SnO<sub>2</sub> and g-C<sub>3</sub>N<sub>4</sub> via planetary the ball milling approach, characterized with scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, UV–Vis diffuse reflectance spectra, X-ray photoelectron spectroscopy, and photoluminescence spectra. The g-C<sub>3</sub>N<sub>4</sub>-SnO<sub>2</sub> composite showed better isopropanol gas sensing performance from 2&#xa0;ppm to 300&#xa0;ppm at 473&#xa0;K in light than without light. The variation in reference resistance voltage shows a clear linear relationship with the increase in isopropanol gas concentration. However, at 334&#xa0;K without light, the g-C<sub>3</sub>N<sub>4</sub>-SnO<sub>2</sub> composite showed poor isopropanol gas sensing performance; at 334&#xa0;K in light, the g-C<sub>3</sub>N<sub>4</sub>-SnO<sub>2</sub> composite showed weak isopropanol gas sensing performance. In summary, temperature is the main factor influencing gas sensitivity of the g-C<sub>3</sub>N<sub>4</sub>-SnO<sub>2</sub> composite. The isopropanol gas sensing performance of the g-C<sub>3</sub>N<sub>4</sub>-SnO<sub>2</sub> composite can be improved at higher temperature in light.</p>

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Preparation of g-C3N4 Hybridizing with SnO2 for Isopropanol Gas Sensing Performance in Light

  • 期刊论文

  • 发表日期：

    2025年6月27日

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  • Jinquan Wang,
  • Xinhua Xiao,
  • Jing Guo,
  • Jingling Ji,
  • Qiao Fang,
  • Saisai Yuan,
  • Teruhisa Ohno,
  • Ming Zhang

摘要

A g-C3N4-SnO2 composite was prepared with SnO2 and g-C3N4 via planetary the ball milling approach, characterized with scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, UV–Vis diffuse reflectance spectra, X-ray photoelectron spectroscopy, and photoluminescence spectra. The g-C3N4-SnO2 composite showed better isopropanol gas sensing performance from 2 ppm to 300 ppm at 473 K in light than without light. The variation in reference resistance voltage shows a clear linear relationship with the increase in isopropanol gas concentration. However, at 334 K without light, the g-C3N4-SnO2 composite showed poor isopropanol gas sensing performance; at 334 K in light, the g-C3N4-SnO2 composite showed weak isopropanol gas sensing performance. In summary, temperature is the main factor influencing gas sensitivity of the g-C3N4-SnO2 composite. The isopropanol gas sensing performance of the g-C3N4-SnO2 composite can be improved at higher temperature in light.