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Surface-Engineered Copper Oxide with Enhanced Peroxidase-Mimic Activity for Ag+ Detection.
Jiazhen Lin1, Xuefeng Shao1, Yuhong Zhong1
1School of Chemical Engineering, College of Chemistry and Materials, State Province Joint Engineering Laboratory of Zeolite Membrane Materials, Jiangxi Normal University, Nanchang 330022, China.
Inorganic Chemistry
|June 17, 2026
Summary
Surface engineering of copper oxides with trithiocyanuric acid enhances nanozyme stability and peroxidase-mimic activity. This improves colorimetric detection of silver ions (Ag+) in water samples, crucial for environmental safety management.
Area of Science:
- Materials Science
- Environmental Science
- Analytical Chemistry
Background:
- Nanozyme stability and activity are key for effective Ag+ pollution detection.
- Developing convenient enzyme-mimic colorimetric methods is essential for environmental safety.
Purpose of the Study:
- To enhance copper oxide nanozymes' peroxidase-mimic (POD-mimic) activity and stability.
- To develop a sensitive and selective colorimetric platform for Ag+ detection.
Main Methods:
- Surface engineering of copper oxides using trithiocyanuric acid (TTCA).
- In situ reductive coordination to form poly-TTCA/Cu+ and TTCA/Cu+ species.
- Utilizing enhanced POD-mimic activity for colorimetric Ag+ detection.
Main Results:
- Surface engineering significantly boosted POD-mimic activity and catalytic stability of copper oxides.
- Identified unsaturated Cu+···S═C coordination as critical for H2O2 activation.
- Developed a colorimetric platform for Ag+ detection with a 0.02 μM detection limit, applied to real water samples.
Conclusions:
- The surface-engineering strategy effectively improves nanozyme performance for Ag+ detection.
- Ag+ detection relies on Ag+-mediated disruption and passivation of POD-mimic activity.
- This work provides insights into nanozyme structure-activity relationships for diverse applications.
