SnO2/g-C3N4 双 2 维材料对甲醛气敏响应的提升

doi:10.12066/j.issn.1007-2861.2109

摘要/Abstract

摘要：

以溶剂热法合成超薄 2 维 SnO₂ 纳米片,以高温热解尿素进行化学气相沉积,得到具有类石墨烯结构的g-C₃N₄ ,通过研磨、超声、干燥等操作将 2 种 2 维材料复合成 SnO₂/g-C₃N₄ .通过 X 射线衍射仪 (X-ray diffraction,XRD)、扫描电子显微镜 (scanning electron microscopy,SEM)、透射电子显微镜 (transmission electron microscopy,TEM) 对合成材料的组成、形貌和结构进行了表征. 结果显示, SnO₂ 纳米片均匀地分布在 g-C₃N₄ 载体上.在对甲醛气敏测试结果分析中发现,复合材料 SnO₂/g-C₃N₄ 相对于 SnO₂/g-C₃N₄ ,具有更高的灵敏度、更好的选择性以及更快的响应速度. SnO₂/g-C₃N₄复合材料的合成对于提升气敏材料的性能提供了一种简单有效的策略,有望在室内甲醛检测方面取得更多的研究成果.

关键词: SnO₂, g-C₃N₄ , 2 维纳米材料, 气敏性质, 甲醛检测

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

中图分类号:

TP 212.1

张文爽, 袁同伟, 张丹, 马志恒, 程知萱, 徐甲强. SnO₂/g-C₃N₄ 双 2 维材料对甲醛气敏响应的提升[J]. 上海大学学报(自然科学版), 2020, 26(6): 945-953.

ZHANG Wenshuang, YUAN Tongwei, ZHANG Dan, MA Zhiheng, CHENG Zhixuan, XU Jiaqiang. Enhancement of SnO₂/g-C₃N₄ dual two-dimensional materials for formaldehyde gas sensing[J]. Journal of Shanghai University（Natural Science Edition）, 2020, 26(6): 945-953.

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SnO₂/g-C₃N₄ 双 2 维材料对甲醛气敏响应的提升

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

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