Temperature-Responsive Janus Colloidal Emulsifier for the Removal of Organic Pollutants in One Pot

Organic pollution, involving both water-soluble and water-insoluble contaminants, has posed a significant environmental challenge. In this study, the temperature-responsive Au/PNIPAM-PDVB@silica-OTS Janus particles (JPs) were synthesized and employed as a catalytic colloidal emulsifier for the treatment of wastewater containing both water-soluble and water-insoluble pollutants in one port. The as-used JPs exhibited excellent temperature-responsive emulsification performance at the oil-water interface and achieved the efficient removal of organic pollutants by loading Au nanoparticles. Experimental results showed a 98.7% removal ratio for methyl orange in simulated wastewater within 10 min, with similar high ratios for other dyes. The separation of the catalyst and the pollutants was easily achieved via near-infrared light-induced emulsion demulsification, providing an efficient and recyclable solution for wastewater treatment. This study highlighted the potential of JPs as a multifunctional interfacial material for sustainable and efficient wastewater treatment, offering an approach to addressing complex pollution situations.