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Green and facile solvent-free synthesis of NiTe2 nanocrystalline material applied to voltammetric determination of antioxidant morin
Materials Today Communications ( IF 3.8 ) Pub Date : 2020-06-26 , DOI: 10.1016/j.mtcomm.2020.101251
Kelli de Fatima Ulbrich , João Paulo Winiarski , Cristiane Luisa Jost , Carlos Eduardo Maduro de Campos

Nanocrystalline nickel ditelluride, NiTe2, has been prepared mechanochemically using ball milling in an inert atmosphere at room temperature, starting from Ni34Te66 powder mixtures. Structural and microstructural characterization of the Ni34Te66 alloy was performed by X-ray powder diffraction analysis and transmission electron microscopy. The formation of a trigonal NiTe2 phase (with P-3 m1 symmetry) occurs along with 3 h, and the pure-phase sample with average crystallite size of about 18 nm is achieved with 6 h of milling. The nanocrystalline samples show a paramagnetic behavior at 2 K, with a magnetic moment decreasing at room temperature. The Ni34Te66 alloy containing 18 nm nanocrystallites of NiTe2 was applied in the construction of carbon paste electrodes to the voltammectric determination of morin, a phenolic and antioxidant compound present in red wines generally considered to act as UV protectant and free-radical scavenger. The electroanalytical response is linear from 0.014–32.0 μmol L−1 with a limit of detection of 0.0133 μmol L‒1 and a recovery range of 101–120 % (n = 3). The proposed sensor NiTe2/CPE was successfully applied to the determination of morin in high, medium and low polyphenols content red wines such as Tannat, Cabernet Sauvignon and Pinot Noir.



中文翻译:

绿色便捷的NiTe 2纳米晶材料的无溶剂合成,用于伏安法测定抗氧化剂吗啉

纳米晶二碲化镍NiTe 2是在室温下在惰性气氛中使用球磨机从Ni 34 Te 66粉末混合物机械化学制备的。Ni 34 Te 66合金的结构和微观结构表征是通过X射线粉末衍射分析和透射电子显微镜进行的。在3 h左右就形成了三角形的NiTe 2相(具有P-3 m1对称性),经过6 h的研磨,平均晶粒尺寸约为18 nm的纯相样品得以形成。纳米晶体样品在2 K下表现出顺磁性,在室温下磁矩减小。然后我含NiTe 2的18 nm纳米微晶的34 Te 66合金被用于碳糊电极的伏安测定中的摩林。摩林是红葡萄酒中存在的一种酚类和抗氧化剂化合物,通常被认为是紫外线保护剂和自由基清除剂。电分析响应在0.014–32.0μmolL -1范围内呈线性,检出限为0.0133μmolL ‒1,回收率范围为101–120%(n  = 3)。所提出的传感器NiTe 2 / CPE已成功地用于测定高,中和低多酚含量的红葡萄酒(如Tannat,Cabernet Sauvignon和Pinot Noir)中的鼠李。

更新日期:2020-06-26
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