Application Of 0D And 2D Nanomaterials For Removal And Detection Of Refractory Organic Contaminants In Water

Nanoscale materials tend to have a larger specific surface area,richer active sites,and better conductivity and catalytic properties,whichbroadens the application range of the original materials.In this paper,the applications of 0D and2 D nanomaterials in the detection and catalytic removal of organic pollutant were explored.The first section,4-amino-3-hydrazino-5-mercapto-1,2,4-triazole(AHMT)was modified to the surface of0 D gold nanoparticles(AuNPs)through Au-S bonds,and thus preparation of the AHMT functionalized AuNPs(AHMT-AuNPs).It can be realized the rapid detection of clenbuterol by using the hydrogen bonding interaction between the clenbuterol and AHMT.Results showed that under the optimal experimental conditions(AHMT concentration of 30 ?M,the reaction pH of7.4,the reaction temperature of30 ?,the reaction time of20 min),the method had the detection range of 0.001 ?M to 80 ?M and a detection limit of 0.6 nM for the detection of clenbuterol.At the same time,it was found that the developed method had a good selecticity for clenbuterol detection.In addition,this method can also be used to effectively detect the clenbuterol in practical water samples.The second section,2D bismuth tungstate(BWO)nanomaterial wasloaded on reduced graphene oxide(rGO)to improve its photocatalytic performance for efficient degradation of organic pollutants.Stable 2D/2D reduced graphene oxide-bismuth tungstate(rGO-BWO)compounds were synthesized by a simple hydrothermal method.The synthesized rGO-BWO compounds showed high photocatalytic activityon aqueous tetracycline degradation,and the catalytic activity was better than pure 2D BWOnanomaterial and rGO.Of which,rGO not only acted as acceptor,transporter,and mediator for promoting the photogenerated electrons transfer,but also played an important role in the negative shift of Fermi level,resulting in a more negative conduction band potential.Moreover,it was also beneficial to the generation of superoxide radicals,greatly improving the photocatalytic performance of 2D BWO.