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

作　　者：张文爽 袁同伟 张丹 马志恒 程知萱[1] 徐甲强[1] ZHANG Wenshuang;YUAN Tongwei;ZHANG Dan;MA Zhiheng;CHENG Zhixuan;XU Jiaqiang(College of Sciences,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学理学院,上海200444

出　　处：《上海大学学报（自然科学版）》2020年第6期945-953,共9页Journal of Shanghai University:Natural Science Edition

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Sn02/gC3N4.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,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.The ultrathin two-dimensional SnO2 nanosheet was synthesized by a solvothermal method,and g-C3 N4 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-C3 N4.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-C3 N4.The results showed that the SnO2 nanosheets were distributed evenly on the g-C3 N4 support and SnO2/g-C3 N4 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.

关 键 词：SNO2 g-C3N4 2维纳米材料 气敏性质 甲醛检测 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]