二硫化钼
水溶液
自来水
检出限
拉曼光谱
硝基苯胺
氮化硼
材料科学
电化学
纳米复合材料
核化学
化学
纳米技术
有机化学
色谱法
冶金
环境工程
工程类
物理化学
物理
光学
电极
作者
Ragu Sasikumar,Byungki Kim
标识
DOI:10.1016/j.psep.2023.07.022
摘要
Harmful nitroaniline isomers are highly environmentally toxic, their main source being the improper release of industrial waste. These isomers are commonly utilized in various chemical products. The presence of these organic compounds in water and the environment poses a significant carcinogenic risk to humans. Therefore, there is an urgent need to monitor and detect these isomers in aqueous mediums to minimize the potential hazards they pose. To tackle this issue, we have developed an electrocatalyst called boron nitride@molybdenum disulfide nanodisk (BN@MoS2 ND) for the simultaneous detection of o-NA and p-NA in tap, river, and mineral water samples. The synthesized nanodisk was characterized using PXRD, FT-IR, Raman spectra, XPS, and FE-SEM studies. The incorporation of BN with MoS2 as a mediator in the reduction mechanism resulted in excellent electron transfer (Rct = 167.73 Ω) and increased surface area (SBET = 31.606 m2 g−1). The proposed sensor exhibited a good linear range, the limit of detection, and sensitivity toward o-NA and p-NA, under pH-regulated conditions, with values of ca. 0.001–778.88 μM, ca. 0.4 nM, and ca. 20.142 ( ± 0.002) μA μM−1 cm−2 and ca. 0.001–569.96 μM, ca. 0.6 nM, and ca. 14.371 (±0.002) μA μM−1 cm−2, respectively. Furthermore, the BN@MoS2/SPCE demonstrated good recoveries of ∼94–99 % for tap, river, and mineral water samples, thereby confirming its excellent ability to detect harmful nitroaniline isomers in aqueous mediums and the environment.
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