Effective and reproducible biosynthesis of nanogold-composite catalyst for paracetamol oxidation

Autor: Veronika Krbečková, Zuzana Šimonová, Petr Langer, Pavlína Peikertová, Kateřina Mamulová Kutláková, Barbora Thomasová, Daniela Plachá
Rok vydání: 2022
Předmět:
Zdroj: Environmental Science and Pollution Research. 29:87764-87774
ISSN: 1614-7499
0944-1344
Popis: Pharmaceutical products are some of the most serious emergent pollutants in the environment, especially nowadays of the COVID-19 pandemic. In this study, nanogold-composite was prepared, and its catalytic activity for paracetamol degradation was investigated. Moreover, for the first time, recycled waste diatomite earth (WDE) from beer filtration was used for reproducible gold nanoparticle (Au NPs) preparation. We studied Au NPs by various psychical-chemical and analytical methods. Transmission and scanning electron microscopy were used for nanogold-composite morphology, size and shape characterization. Total element concentrations were determined using inductively coupled plasma mass and X-ray fluorescence spectrometry. X-ray powder diffraction analysis was used for crystal structure characterization of samples. Fourier transform infrared spectrometer was used to study the chemical changes before and after Au NP formation. The results revealed that the WDE served as both a reducing and a stabilizing agent for crystalline spherical 30 nm Au NPs as well as acting as a direct support matrix. The kinetics of paracetamol degradation was studied by high-performance liquid chromatography with a photodiode array detector. The conversion of paracetamol was 62% and 67% after 72 h in the absence or presence of light irradiation, respectively, with 0.0126 h
Databáze: OpenAIRE
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