钴
催化作用
氧化剂
抗坏血酸
化学
材料科学
纳米技术
计算机科学
嵌入式系统
无机化学
有机化学
食品科学
作者
Shicheng Zhu,Zhe Li,Feifan Zhang,Fangning Liu,Pengjuan Ni,Chuanxia Chen,Yuanyuan Jiang,Yizhong Lu
标识
DOI:10.1016/j.cej.2022.141053
摘要
Reactive oxygen species (ROS) are an important cause of oxidative skin aging and can be removed by adding some antioxidant ingredients to skin care products. However, total antioxidant capacity (TAC) assays generally require sophisticated laboratory equipment, which greatly limits their daily application. Fortunately, the adoption and development of portable smartphone platforms could promises to solve this challenge. Herein, we report a cobalt single atom-based portable smartphone platform which can realize dynamic-time visualization monitoring the TAC of skin care product. Theoretical calculations and specific experimental results show that single-atom cobalt catalysts (SA-Co/NC) present excellent oxidase-like activity and can effectively convert dissolved oxygen into strongly oxidizing reactive oxygen species. More interestingly, based on the unique sacrificial inhibition catalytic mechanism of ascorbic acid (AA), it can be combined with a portable smartphone platform to detect the TAC of real samples by fitting a time-color-concentration standard curve and recording the change of color RGB values during the reaction. Compared with the traditional scheme, this scheme is convenient, low cost, and can realize visual detection of mobile terminals. This work provides a new scheme for miniaturization, convenience and home-based of TAC detection.
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