Abstract
PtRu/MoS2 nanoparticles (NPs) (PtRu alloy partially coated by one-layer MoS2 nanosheets) were prepared through a ‘wet chemistry’ approach. The obtained NPs were directly embedded, at 5 parts per hundred resin/rubber (phr) loading, in a poly (divinylbenzene-co-vinyl benzyl chloride) hyper-crosslinked (HCL) resin, synthesized via bulk polymerization of the resin precursors, followed by conventional FeCl3 post-crosslinking. The obtained HCL nanocomposites were characterized to evaluate the effect of the NPs. It shows a high degree of crosslinking, a good dispersion of NPs and a surface area up to 1870 ± 20 m2/g. The catalytic activity of the HCL nanocomposite on phenol wet air oxidation was tested at low air pressure (Pair = 0.3 MPa) and temperature (T = 95 °C), and at different phenol concentrations. At the lower phenol concentration, the nanocomposite gives a total organic carbon (TOC) conversion of 97.1%, with a mineralization degree of 96.8%. At higher phenol concentrations, a phenol removal of 99.9%, after 420 min, was achieved, indicating a quasi-complete depletion of phenol, with a TOC conversion of 86.5%, corresponding to a mineralization degree of 84.2%. Catalyst fouling was evaluated, showing good reusability of the obtained nanocomposite.
Highlights
The widespread industrialization process—i.e., the exponential growth of industrial plants—led to a markedly increase in air, soil, and water contaminants concentration
The catalytic activity of the HCL nanocomposite on phenol wet air oxidation was tested at low air pressure (Pair = 0.3 MPa) and temperature (T = 95 ◦C), and at different phenol concentrations
For what concerns the resin, here we propose the synthesis of styrene-based HCL resin via a modified Davankov synthetic strategy, in which a precursor polymer is prepared by bulk polymerization and hyper-crosslinked by Friedel–Crafts reaction [52]
Summary
The widespread industrialization process—i.e., the exponential growth of industrial plants—led to a markedly increase in air, soil, and water contaminants concentration. Economic growth related to industrial development is deeply connected to environmental pollution, and strict standards imposed by new legislation as well as the continuously increasing environmental awareness require practical solutions. Water is a common utility in industrial plants, and the risk of contamination is unavoidably high. An enormous number of organic compounds, widely used in industrial plants (petrochemical, pharmaceutical, bleach, dye, etc.), are extremely toxic contaminants. In order to meet requirements for discharging or recycling, wastewaters should be adequately treated to deplete concentrations of hazardous molecules. Phenol and its derivatives represent a class of treacherous and high biological dangerous compounds [1,2,3], that seriously threaten biological life at high concentrations
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