Research on the microplastics(MPs)is developing towards smaller size,but corresponding methods for the rapid and accurate detection of microplastics,especially nanoplastics still present challenge.In this work,a novel surface and volume enhanced Raman spectroscopy substrate was developed for the rapid detection of microplastic particles below 5 μm.The gold nanoparticles(NPs)were deposited onto the surface and into the V-shaped nanopores of anodized aluminum oxide(AAO)through magnetron sputtering or ion sputtering,and then AuNPs@V-shaped AAO SERS substrate was obtained and studied for microplastic detection.SERS performance ofAAuNPs@V-shaped AAO SERS substrate was evaluated through the detection of polystyrene and polymethyl methacrylate microspheres.Results indicated that individual polystyrene sphere with a diameter of 1 μm can be well detected on AuNPs@V-shaped AAO SERS substrate,and the maximum enhancement factor(EF)can reach 20.In addition,microplastics in ambient atmospheric samples were collected and tested to verify the effectiveness of the AuNPs@V-shaped AAO SERS substrate in the real environment.This study provides a rapid,economic and simple method for detecting and identifying microplastics with small size.

Juan Liu;Guanjun Xu;Xuejun Ruan;Kejian Li;Liwu Zhang

Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention,Department of Environmental Science&Engineering,Fudan University,Shanghai 200433,China;Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China

环境科学与工程前沿

[1]Juan Liu;Guanjun Xu;Xuejun Ruan;Kejian Li;Liwu Zhang-.V-shaped substrate for surface and volume enhanced Raman spectroscopic analysis of microplastics)[J].环境科学与工程前沿,2022(11):75-84

ofAAuNPs

shaped,substrate,surface,volume,enhanced,Raman,spectroscopic,analysis,microplastics,Research,MPs,developing,towards,smaller,size,but,corresponding,methods,rapid,accurate,detection,especially,nanoplastics,still,present,challenge,In,this,work,novel,spectroscopy,was,developed,below,gold,nanoparticles,were,deposited,onto,into,nanopores,anodized,aluminum,oxide,AAO,through,magnetron,sputtering,then,SERS,obtained,studied,performance,evaluated,polystyrene,polymethyl,methacrylate,microspheres,Results,indicated,that,individual,diameter,can,well,detected,maximum,enhancement,EF,reach,addition,ambient,atmospheric,samples,collected,tested,verify,effectiveness,real,environment,This,study,provides,economic,simple,detecting,identifying

0.52284