Catalytic activity improvement by one-dimensional structure nanocomposite for hydrogen peroxide detection in occupational exposure monitoring

The peroxidase reaction conducted by catalyst was used for colorimetric detection of H2O2. A new catalyst with one-dimensional structure is presented for oxidation reaction. Regarding the widespread use and harmful effects of Hydrogen peroxide (H2O2) providing a suitable method is essential. A nanocomposite of zinc oxide rods was prepared in the surface of magnetic nano silica aerogel (ZnR-MSiA). The synthesized nanocomposite was identified using Brunauer-Emmett-Teller (BET), X-ray diffraction spectroscopy (EDS) and scanning electron microscopy (SEM). The catalytic activity of one-dimensional ZnR-MSiA was compared with zinc oxide. Finally, a colorimetric method was validated for H2O2 detection in air samples. The synthesises of ZnR-MSiA nanocomposite were confirmed with the presence of Fe, O, Si and Zn in EDS analysis. One-dimensional chemical with pentagonal structure was highlighted with the SEM technique. This nanocomposite was used for peroxidase-like catalysis of hydrogen peroxide determination. The results show that the catalytic activity of ZnR-MSiA is higher than zinc oxide. The maximum peroxidation reaction was obtained with 0.294 mg of ZnR-MSiA and TMB of 10.946 mmol/L at pH = 2.61. The investigated method was evaluated using LOD, LOQ, and recovery parameters at the level of 0.14 ppm, 0.42 ppm, and 98.21%, respectively, in a linear range of 0.5-50 ppm. The determination of H2O2 in occupational exposure samples was determined to be better than the OSHAVI-6 method. A new nano-catalyst for oxidation reaction with higher affinity to H2O2 and higher speed was produced. Based on the studies, unic electron transportation properties of one-dimensional structures are highlighted for colorimetric detection of H2O2. In conclusion, an applicable nanocomposite is suggested for sensitive, accurate and reproducible detection of H2O2 samples.