School of Bioengineering and Health, State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, PR China; Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Hubei Hongshan Laborator, Key Laboratory of Biology and Genetic Improvement of Oil Crops, Key Laboratory of Detection for Mycotoxins, National Reference Lab for Biotoxin Test, Wuhan 430062, PR China; College of Chemistry & Chemical Engineering, Hubei University, Wuhan 430062, PR China.
Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Hubei Hongshan Laborator, Key Laboratory of Biology and Genetic Improvement of Oil Crops, Key Laboratory of Detection for Mycotoxins, National Reference Lab for Biotoxin Test, Wuhan 430062, PR China.
J Hazard Mater. 2023 Oct 15;460:132281. doi: 10.1016/j.jhazmat.2023.132281. Epub 2023 Aug 12.
As a major hazardous additive released from microplastics and nanoplastics, identifying dibutyl phthalate (DBP) in complex matrices attracts a growing concern in environmental monitoring and food safety. For the first time, CuO/CuSnS nanoflower is prepared and serves as the photoactive material which can be constructed as a smartphone-based photoelectrochemical (PEC) point-of-care test (POCT). Effectively matching energy levels between CuO and CuSnS accelerated the transfer of photogenerated electron-hole pairs, significantly improving the intelligent PEC POCT performance. The novel CuO/CuSnS has proven to be the Z-scheme heterojunction by density functional theory calculation. A competitive immunoassay has been realized on a CuO/CuSnS modified electrode, dramatically decreasing the photocurrent signal and enhancing POCT sensitivity. The smartphone has been used to record and transfer PEC results. Under optimal conditions, the PEC POCT exhibited a satisfying linear range (0.04-400 ng/mL) and a low detection limit of 7.94 pg/mL in real samples, together with excellent stability, repeatability, reproducibility and selectivity. The PEC POCT system provides good performance and practicability in determining DBP in water and edible oil samples. This proposal provides a practical strategy for the intelligent POCT for environment monitoring and food safety.
作为微塑料和纳米塑料释放的主要有害添加剂，在环境监测和食品安全中，识别邻苯二甲酸二丁酯（DBP）在复杂基质中受到越来越多的关注。首次制备了氧化铜/铜锡硫化物纳米花，并将其用作光活性材料，可构建基于智能手机的光电化学（PEC）即时检测（POCT）。氧化铜和铜锡硫化物之间有效匹配的能级加速了光生电子-空穴对的转移，显著提高了智能 PEC POCT 的性能。通过密度泛函理论计算证明了新型氧化铜/铜锡硫化物是 Z 型异质结。在氧化铜/铜锡硫化物修饰电极上实现了竞争性免疫测定，显著降低了光电流信号并提高了 POCT 的灵敏度。智能手机用于记录和传输 PEC 结果。在最佳条件下，PEC POCT 在实际样品中表现出令人满意的线性范围（0.04-400ng/mL）和低检测限为 7.94pg/mL，具有出色的稳定性、重复性、重现性和选择性。PEC POCT 系统在测定水样和食用油样中的 DBP 方面具有良好的性能和实用性。本研究为环境监测和食品安全的智能 POCT 提供了一种实用策略。
