Fathima T K Sana, Banu A Arshiya, Devasena T, Ramaprabhu Sundara
Alternative Energy and Nanotechnology Laboratory, Nano Functional Materials and Technology Centre (NFMTC), Department of Physics, Indian Institute of Technology Madras Chennai 600036 India
Centre for Nanoscience and Technology, A.C. Tech Campus, Anna University Chennai 600025 India.
RSC Adv. 2022 Jul 4;12(30):19375-19383. doi: 10.1039/d2ra01789j. eCollection 2022 Jun 29.
1,4-Dioxane is a carcinogenic, non-biodegradable, organic water pollutant which is used as a solvent in various industries. It is also formed as an undesired by-product in the cosmetic and pharmaceutical industry. Given its carcinogenicity and ability to pollute, it is desirable to develop a sensitive and selective sensor to detect it in drinking water and other water bodies. Current works on this sensor are very few and involve complex metal oxide composite systems. A sensitive electrochemical sensor for 1,4-dioxane was developed by modifying a glassy carbon electrode (GCE) with a reduced graphene oxide-curcumin (rGO-CM) nanocomposite synthesized by a simple solution approach. The prepared rGO-CM was characterized by X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR) Spectroscopy, Raman spectroscopy, UV-Vis spectroscopy, and Scanning Electron Microscopy (SEM). The rGO-CM/GCE sensor was employed for the detection of 1,4-dioxane in the range of 0.1-100 μM. Although, the detection range is narrower compared to reported literature, the sensitivity obtained for the proposed sensor is far superior. Moreover, the limit of detection (0.13 μM) is lower than the dioxane detection target defined by the World Health Organization (0.56 μM). The proposed rGO-CM/GCE also showed excellent stability and good recovery values in real sample (tap water and drinking water) analysis.
1,4-二氧六环是一种致癌、不可生物降解的有机水污染物，在各个行业中用作溶剂。它也是化妆品和制药行业中不希望产生的副产物。鉴于其致癌性和污染能力，开发一种灵敏且选择性高的传感器来检测饮用水和其他水体中的1,4-二氧六环是很有必要的。目前关于这种传感器的研究非常少，且涉及复杂的金属氧化物复合体系。通过用一种简单溶液法合成的还原氧化石墨烯-姜黄素（rGO-CM）纳米复合材料修饰玻碳电极（GCE），开发了一种用于检测1,4-二氧六环的灵敏电化学传感器。通过X射线衍射（XRD）、傅里叶变换红外（FTIR）光谱、拉曼光谱、紫外可见光谱和扫描电子显微镜（SEM）对制备的rGO-CM进行了表征。rGO-CM/GCE传感器用于检测浓度范围为0.1 - 100 μM的1,4-二氧六环。虽然与已报道的文献相比，检测范围较窄，但所提出的传感器获得的灵敏度要高得多。此外，检测限（0.13 μM）低于世界卫生组织定义的二氧六环检测目标（0.56 μM）。所提出的rGO-CM/GCE在实际样品（自来水和饮用水）分析中也表现出优异的稳定性和良好的回收率。
