一种用于无标记和无媒介体直接传感二硝基甲苯的花状氧化锌-氧化银纳米复合材料。

A flower-like ZnO-AgO nanocomposite for label and mediator free direct sensing of dinitrotoluene.

作者信息

Chakraborty Urmila, Bhanjana Gaurav, Adam Jost, Mishra Yogendra Kumar, Kaur Gurpreet, Chaudhary Ganga Ram, Kaushik Ajeet

机构信息

Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University Chandigarh 160014 India

Mads Clausen Institute, University of Southern Denmark Alsion 2 6400 Sønderborg Denmark.

出版信息

RSC Adv. 2020 Jul 27;10(46):27764-27774. doi: 10.1039/d0ra02826f. eCollection 2020 Jul 21.

2,4-Dinitrotoluene (2,4-DNT) is a nitro aromatic compound used as a raw material for trinitrotoluene (TNT) explosive synthesis along with several other industrial applications. Easy, rapid, cost-effective, and selective detection of 2,4-DNT is becoming essential due to its hepato carcinogenic nature and presence in surface as well as ground water as a contaminant. Keeping this in view, this research, for the first-time, reports the synthesis of novel ZnO-AgO composite nanoflowers on a gold (Au) substrate, to fabricate an electrochemical sensor for label-free, direct sensing of 2,4-DNT selectively. The proposed ZnO-AgO/Au sensor exhibits a sensitivity of 5 μA μM cm with a low limit of detection (LOD) of 13 nM, in a linear dynamic range (LDR) of 0.4 μM to 40 μM. The sensor showed reasonably high re-usability and reproducibility, with reliable results for laboratory and real-world samples.

2,4-二硝基甲苯（2,4-DNT）是一种硝基芳香化合物，用作三硝基甲苯（TNT）炸药合成的原料以及其他多种工业用途。由于其具有肝致癌性且作为污染物存在于地表水和地下水中，因此对2,4-DNT进行简便、快速、经济高效且选择性的检测变得至关重要。鉴于此，本研究首次报道了在金（Au）基底上合成新型ZnO-AgO复合纳米花，以制造一种用于无标记、直接选择性检测2,4-DNT的电化学传感器。所提出的ZnO-AgO/Au传感器在0.4 μM至40 μM的线性动态范围（LDR）内，灵敏度为5 μA μM cm，检测限（LOD）低至13 nM。该传感器表现出相当高的可重复使用性和重现性，对实验室样品和实际样品均能给出可靠结果。