Decorating Au nanoparticles onto optimized P(tBA‐co‐DMAEMA) carriers for ameliorative catalytic capability

Abstract

Gold nanoparticles are increasingly being explored as novel catalytic nanomaterials due to their great reductive capacity. However, the van der Waals forces between them would bring poor stabilities as well as attenuated catalytic properties in solution. Therefore, it is significant to find carriers that could prevent catalytic gold nanoparticles from agglomerating. Herein, hydrophilic dimethylaminoethyl methacrylate (DMAEMA) and hydrophobic tert‐butyl acrylate (tBA) were used as co‐monomers to synthesize copolymer P(tBA‐co‐DMAEMA) microspheres by one‐step emulsifier‐free emulsion polymerization. Afterward, the self‐assembly behaviors of the amphiphilic polymers P(tBA‐co‐DMAEMA) under different conditions like molar ratio of DMAEMA/tBA and ethanol/water were explored to reveal an optimal condition for obtaining copolymer with appropriate size and morphology. These microspheres were used as carriers for gold nanoparticles, since HAuCl4 could be simply reduced and stabilized on their surface. Furthermore, various conditions such as HAuCl4 content, adding method of HAuCl4, protonation time and reducing conditions were filtered for the decoration of gold nanoparticles on the shell of that assembled copolymer. This composite was applied as an excellent catalyst for hydrogenation of hazardous chemicals (4‐nitrophenol and nitrobenzene). And it shows improved catalytic performance for both 4‐nitrophenol in the aqueous system and nitrobenzene in the oil system. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48920.

Concurrent Oxidation–Reduction Reactions in a Single System Using a Low-Plasma Phenomenon: Excellent Catalytic Performance and Stability in the Hydrogenation Reaction

“…Hence, this catalyst exhibited remarkable recyclability and catalytic activity compared to those reported previously (Tables and S3). − Moreover, in our case, it was easy to separate Cu-TiO 2 @SiO 2 from the reaction medium. Conversely, most reported catalysts require sophisticated methods for their removal from the reaction solution, such as centrifugation.…”

Facile Preparation of PVDF/CoFe2O4-ZnO Hybrid Membranes for Water Depollution

“…An increase in the hydrophilic characte the membrane through nanoparticles blending can be observed. The best hydrophil is exhibited by the PVDF-CF-ZnO membrane, probably due to the hydroxyl groups sent on the ZnO nanoparticles surface [38]. The band gap energy of the modified membranes was evaluated by the extrapolation of the linear portion of (αhυ) 2 versus photon energy, hυ, by using the Tauc's equation (Figure 6b) [35].…”

“…An increase in the hydrophilic character of the membrane through nanoparticles blending can be observed. The best hydrophilicity is exhibited by the PVDF-CF-ZnO membrane, probably due to the hydroxyl groups present on the ZnO nanoparticles surface [38]. Since the properties of our materials can be strongly influenced by the presence of porosity, surface area and porosity measurements were performed.…”