Journal of Shanghai University(Natural Science Edition) ›› 2020, Vol. 26 ›› Issue (6): 945-953.doi: 10.12066/j.issn.1007-2861.2109

• Research Articles • Previous Articles     Next Articles

Enhancement of SnO2/g-C3N4 dual two-dimensional materials for formaldehyde gas sensing

ZHANG Wenshuang, YUAN Tongwei, ZHANG Dan, MA Zhiheng, CHENG Zhixuan(), XU Jiaqiang   

  1. College of Sciences, Shanghai University, Shanghai 200444, China
  • Received:2018-08-14 Online:2020-12-31 Published:2020-12-29
  • Contact: CHENG Zhixuan E-mail:zxcheng@shu.edu.cn

Abstract:

The ultrathin two-dimensional  SnO2 nanosheet was synthesized by a solvothermal method, and  g-C3N4  with grapheme-like structure was obtained by chemical vapor deposition of high-temperature pyrolytic urea. Both materials were then mixed by grinding, sonication, and drying to fabricate  SnO2/g-C3N4 . X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to characterize the compositions, morphology, and structures of  SnO2/g-C3N4 . The results showed that the  SnO2/g-C3N4 nanosheets were distributed evenly on the  g-C3N4  support and  SnO2/g-C3N4  materials have higher sensitivity, better selectivity, and faster response than pure  SnO2 for the detection of formaldehyde vapor. The synthetic approach provides a simple and effective strategy for improving the performance of gas-sensing materials and may find application in formaldehyde detection in indoor environments.

Key words: ,  SnO2,  g-C3N4 , two-dimensional nanomaterials, gas sensing property, formaldehyde detection

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