摘要
甲醛(HCHO)是众所周知的有机化工异味主要来源,对其进行监测具有重要意义。然而,大多数化工厂HCHO传感材料不具有低检测限并且在高温下工作。因此,该研究合成掺杂氮的石墨烯量子点(N-GQDs)修饰的二维(2D)介孔超薄SnO_(2)。研究结果表明,N-GQDs/SnO_(2)纳米复合材料对HCHO检测具有较高效率。添加质量分数1.00%的N-GQDs后,SnO_(2)气体传感器的响应(Ra/Rg)在60℃下检测HCHO时得响应从120增加到361。此外,相应的检测限低至10×10^(-9)mg/ml。该传感器对HCHO的检测表现出优异的选择性和稳定性。增强的传感性能归因于SnO_(2)的较大比表面积和N-GQDs的电子调节。因此,该研究提出的新型HCHO传感器,可以扩展GQDs纳米复合材料的研究和应用潜力。
Formaldehyde(HCHO)is known to be a major source of organic chemical odors and its monitoring is of great importance.However,most HCHO sensing materials for chemical plants do not have low detection limits and operate at high temperatures.Therefore,in this paper,two-dimensional(2D)mesoporous ultrathin SnO_(2)modified with nitrogen-doped graphene quantum dots(N-GQDs)was synthesized.The results showed that the N-GQDs/SnO_(2)nanocomposites have high efficiency for HCHO detection.The response(Ra/Rg)of the SnO_(2)gas sensor increased from 120 to 361 for the detection of HCHO at 60℃with the addition of 1.00(wt)of N-GQDs,and the corresponding detection limit was as low as 10×10^(-9)mg/ml.The sensor exhibited excellent selectivity and stability for the detection of HCHO.The enhanced sensing performance is attributed to the large specific surface area of SnO_(2)and the electronic modulation of N-GQDs.Therefore,the novel HCHO sensor proposed in this study can extend the research and application potential of GQDs nanocomposites.
作者
刘杰
贾建和
LIU Jie;JIA Jian-he(Hebei Aojia Environment Technology Co.Ltd.,Shijiazhuang 050024,Hebei,China;Hebei University of Science andTechnology,Shijiazhuang 050000,Hebei,China)
出处
《合成材料老化与应用》
CAS
2023年第3期92-95,共4页
Synthetic Materials Aging and Application
关键词
化工异味
甲醛
石墨烯量子点
监测
chemical odor
formaldehyde
graphene quantum dots
monitoring
