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Engineering a WTe2@Pt nanozyme for machine learning-empowered colorimetric H2O2 detection
Meimei Xu1, Yusi Peng2, Yuzhen Zhao1
1Xi'an Key Laboratory of Advanced Photo-electronics Materials and Energy Conversion Device, Technological Institute of Materials &Energy Science (TIMES), Xijing University, Xi'an 710123, China. zyz19870226@163.com.
Chemical Communications (Cambridge, England)
|May 14, 2026
Summary
A novel platinum-anchored tungsten ditelluride nanozyme mimics peroxidase activity for hydrogen peroxide detection. This method uses spectrophotometry and radiofrequency-powered point-of-care testing with smartphone images, removing the need for lab equipment.
Area of Science:
- Nanomaterials Science
- Analytical Chemistry
- Biomedical Engineering
Background:
- Peroxidase-like nanozymes are crucial for biosensing applications.
- Developing efficient and portable detection methods for hydrogen peroxide (H2O2) is essential.
- Existing methods often require bulky laboratory equipment, limiting point-of-care applications.
Purpose of the Study:
- To develop a novel Pt-anchored WTe2 nanozyme with enhanced peroxidase-like activity.
- To establish a simple, rapid, and sensitive colorimetric method for H2O2 detection.
- To demonstrate a portable point-of-care (POC) testing platform utilizing smartphone imaging and radiofrequency (RF) power.
Main Methods:
- Synthesis of platinum (Pt)-anchored tungsten ditelluride (WTe2) nanosheets.
- Characterization of the nanozyme's peroxidase-like catalytic activity.
- Development of a colorimetric assay for H2O2 detection using spectrophotometry.
- Integration of the assay with an RF-powered POC device for smartphone image analysis.
Main Results:
- The Pt-anchored WTe2 nanozyme exhibited significant peroxidase-like activity.
- The colorimetric detection method showed a strong correlation with H2O2 concentration (R2 = 0.958).
- The developed POC system enabled accurate H2O2 quantification using smartphone images, eliminating the need for traditional laboratory instruments.
Conclusions:
- Pt-anchored WTe2 nanozymes offer a promising platform for sensitive H2O2 detection.
- The RF-powered POC system provides a viable, instrument-free approach for point-of-care diagnostics.
- This technology has the potential to simplify and decentralize biochemical analysis.
