【作者】 田先清； 陈玲； 余堃； 王新锋；

【Author】 TIAN Xian-qing,CHENG Ling,YU Kun,WANG Xin-feng (Institute of Chemical Materials,CAEP,Mianyang 621900,China)

【机构】 中国工程物理研究院化工材料研究所；

【摘要】 痕量硝基芳香炸药的现场可视化检测技术已成为环境污染物监测领域的热点研究之一。本文根据荧光比率探针的优点与设计原理,提出通过引入外标参比色的方式,提高肉眼对微弱颜色变化的敏感度,并基于巯基乙胺包裹的红色CdTe量子点(CA-CdTe)和巯基乙酸修饰的绿色CdTe量子点(TGA-CdTe)构建了可用于可视化检测痕量硝基芳香炸药的量子点试纸。2,4,6-三硝基甲苯和苦味酸的可视化检测限分别达到1.6和1.2 ng/mm~2。我们的工作提供了一种简单、方便的方法用于构建可视化检测硝基芳香炸药的纸质传感器,未来可用于炸药残留物的现场分析。更多还原

【Abstract】 The visual detection of trace nitroaromatic explosives has become a hot research point in the field detection of environmental pollutions’.In this paper,we proposed a novel strategy to enhance the sensitivity of the naked eyes to the faint color changes by introducing the external reference color.The indicating paper was fabricated by using the red cysteamine capped cadmium telluride quantum dots(CA-CdTe QDs) and green thioglycollic acid modified cadmium telluride quantum dots(TGA-CdTe QDs).The response ability of the mixture QDs-based indicating paper was enhanced when the green emission TGA-CdTe QDs were introduced as the background color.The visual detection limits of the mixture QDs-based indicating paper for 2,4,6-trinitrotoluene and picric acid are 1.6 and 1.2 ng/mm~2,respectively.Our work provides a simple and convenient protocol to construct the paper sensor for visual detection of nitroaromatic explosives which is potentially useful in field environmental analysis.更多还原