Concise Report
Mechanism of TMB Discoloration Catalyzed by Layered CoNi@CN Nanozymes: Application Based on Smart Phone for Resorcinol Detection
Qingyong Guo,
Rongsheng Xiao,
Haifeng Chen,
Meishuo Bao,
Jingwen Qi,
Qian-qian Jia,
Wuxiang Zhang,
Qingyong Guo
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
Search for more papers by this authorRongsheng Xiao
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
Search for more papers by this authorHaifeng Chen
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
Search for more papers by this authorMeishuo Bao
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
Search for more papers by this authorJingwen Qi
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
Search for more papers by this authorCorresponding Author
Qian-qian Jia
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
E-mail: [email protected] (Qian-qian Jia); [email protected] (Wuxiang Zhang)Search for more papers by this authorCorresponding Author
Wuxiang Zhang
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
E-mail: [email protected] (Qian-qian Jia); [email protected] (Wuxiang Zhang)Search for more papers by this authorQingyong Guo,
Rongsheng Xiao,
Haifeng Chen,
Meishuo Bao,
Jingwen Qi,
Qian-qian Jia,
Wuxiang Zhang,
Qingyong Guo
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
Search for more papers by this authorRongsheng Xiao
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
Search for more papers by this authorHaifeng Chen
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
Search for more papers by this authorMeishuo Bao
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
Search for more papers by this authorJingwen Qi
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
Search for more papers by this authorCorresponding Author
Qian-qian Jia
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
E-mail: [email protected] (Qian-qian Jia); [email protected] (Wuxiang Zhang)Search for more papers by this authorCorresponding Author
Wuxiang Zhang
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003 China
E-mail: [email protected] (Qian-qian Jia); [email protected] (Wuxiang Zhang)Search for more papers by this authorComprehensive Summary
Real-time on-site monitoring of resorcinol (RS) concentrations is crucial for detecting hazardous levels, enabling prompt response measures to mitigate potential environmental and health risks. In this study, we developed an innovative method using CoNi@CN-2 nanozymes to activate peroxymonosulfate (PMS) for oxidizing 3,3',5,5'-tetramethylbenzidine (TMB). Our results show that the formation of Ni2+ through the oxidation of Ni0 on the CoNi@CN-2 surface significantly enhances the electron-donating capacity of Co0. The catalytic reaction of TMB is mediated by redox active species (SO4•−, •O2−, •OH and 1O2). RS drives colorimetry by transferring electrons to the benzene ring and specific nitrogen atoms in ox-TMB, reducing ox-TMB to TMB. Furthermore, the colorimetric assay shows a robust linear correlation between RS concentration and absorbance (Abs), described by Abs = –0.44[RS] + 0.886 (0—200 μmol/L, R2 = 0.983). Also, we introduce a novel smartphone-integrated autonomous detection software that can analyze RS concentration and grayscale values (GSV), yielding GSV = 0.327[RS] + 63.601 (0—200 μmol/L, R2 = 0.990) with a detection limit of 5.29 μmol/L. Additionally, excess PMS leads to ROS attacking specific sites in ox-TMB, forming secondary oxidation products. This study has enabled rapid and accurate detection of RS, making a significant contribution to environmental safety and protection.
Supporting Information
| Filename | Description |
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| CJOC202400841-sup-0001-supinfo.pdfPDF document, 1.6 MB |
Appendix S1: Supporting Information |
Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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