Synthesis And Catalytic Performance Of Cubic Shaped Nanogold

In recent years,with the rapid development of industry,a large number of environmental pollutants such as dyes,drugs,and industrial wastewater have been discharged into nature,leading to more and more regions in the world being troubled by environmental pollution problems.Among them,methylene blue（MB）and p-nitrophenol（4-NP）are two common industrial and agricultural pollutants,which cause serious pollution problems.If they are not treated,they will eventually cause serious harm to human life and health.In this situation,precious metal nanoparticles catalysts have received increasing attention as a promising solution to solve water pollution problems by decomposing pollutants.（1）This article synthesized a catalytic active hollow cubic hybrid nanostructure（AgCl AuAg HNCs）catalyst of silver chloride and gold silver alloy using silver chloride as a template.Among them,the AgCl template is formed by mixing AgNO₃and Na Cl solutions,while HAu Cl₄and ascorbic acid are used as gold precursors and reducing agents.By utilizing the covering and guiding effects of Ag⁺,Cl^-ions,and AgCl nanocrystals,gold silver alloy nanocages are formed.The average particle size and shell thickness are 113.5±19.6 nm and 14.2±5.2 nm,respectively.It showed excellent catalytic activity in the catalytic test of p-nitrophenol,and the TOF reached6.51 min^-1.（2）In addition,Ce（NO₃）₃was used as a precursor to further load a layer of CeO₂on the surface of AgCl AuAg HNCs using hydrothermal reduction method,resulting in hollow cubic silver chloride and gold silver alloy nanoparticles coated with cerium oxide with a thickness of approximately 7.59 nm（AgCl-AuAg@CeO₂HNCs）。Due to the localized surface plasmon effect（LSPR）of AgCl-AuAg HNCs and the Schottky structure characteristics at the metal metal oxide interface,the photocatalytic ability of CeO₂can be significantly enhanced.In the test of photocatalytic degradation of methylene blue,about 30 minutes can degrade 92%of methylene blue,indicating that AgCl-AuAg@CeO₂HNCs have excellent photocatalytic performance.Therefore,by analyzing these AgCl-AuAg HNCs and AgCl-AuAg@CeO₂The research on the preparation and catalytic application of HNCs nanostructures not only expands the research ideas for gold based nanocatalysts,but also lays a good technical foundation for catalytic degradation of environmental pollutants.