Synthesis of Ag nanoparticles supported on magnetic halloysite nanozyme for detection of H2O2 in milk and serum
Source abstract
Abstract
In the present study, Ag nanoparticles modified Fe 3O 4 anchored on roughened halloysite nanotubes nanocomposites (Ag@Fe 3O 4/RHNT) with high peroxidase-like activity and good magnetism was fabricated, and accordingly, an efficient and sensitive colorimetric sensing platform was established for the detection of H 2O 2. Firstly, halloysite nanotubes was pre-treated and then Fe 3O 4 nanoparticles were uniformly deposited on the external surface of RHNTs. Finally, Ag nanoparticles were grown onto Fe 3O 4/RHNT by in-situ reduction method. All characterization results confirmed the successful synthesis of Ag@Fe 3O 4/RHNT. The resultant Ag-Fe 3O 4 RNHTs exhibited satisfied catalytic activity to the oxidation of TMB (4,4’-Diamino-3,3′, 5,5′-tetramethylbiphenyl) in the presence of H 2O 2, and the catalytic process is accompanied with the color changed from colorless to bule. Thus, a sensitive colorimetric sensor for detection of H 2O 2 was developed based on Ag@Fe 3O 4/RHNT nanocomposites. And the optimal reaction temperature and pH were determined to be 55 °C and 4, respectively. H 2O 2 can be detected in the range of 10–100 μM with the detection limit of 0.7 μM. In conclusion, we established an efficient colorimetric sensing system for H 2O 2, and applied it to detect H 2O 2 in milk and serum.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Nanomaterials in Catalysis · Electrochemical sensors and biosensors · Carbon and Quantum Dots Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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