The Synthesis Of Graphene Oxide Benzotrizole Composite Materials And Its Application Study

Graphite oxide(GO)has a unique two-dimensional nanostructure and excellentperformance with simple synthesis and economy.GO has been widely used in supercapacitors,catalysis,selective permeability,adsorption,detectors,storage release energy,sensors,and environmental protection.Benzotriazole(BTA)is an important chemical product with important applications in water treatment,metal rust prevention,and corrosion inhibition.Because of strong electron-withdrawing ability of nitrogen atoms,the BTA was easily bonded to oxygen-containing functional groups on graphite oxide.It is rarely mentioned in the existing papers that the combination of graphite oxide and benzotriazole.In this paper,polyvinyl alcohol(PVA),a macromolecule organic material containing a large amount of hydroxyl groups,was used as base materials for its large dissolution in water and excellent mechanical properties.Taking GO and BTA as additives,the composite was designed and prepared by casting and freeze-drying methods.The obtained composites have a certain application value in environmental protection.This paper mainly includes the following aspects:1.The preparing of GO/BTA composite membrane by casting method.Firstly,graphite oxide was synthesized by modified Hummers method.It was combined with each other that the dispersion of graphite oxide and the solution of benzotriazole in order to get the composite material of GO/BTA,dried to form a film.The membrane was characterized by SEM and Raman.The results showed that the introduction of benzotriazole could solve the problem offilm formation of graphite oxide.In the process of film formation,iron particles can also be introduced to make the composite film magnetic.It is also showed that the magnetic film reacts more fully and more homogeneous under the magnetic field conditions than the non-magnetic field conditions.Finally,the reaction mechanism was preliminarily deduced for the interaction of benzotriazole and graphite oxide.2.Study on preparation and adsorption of composite foam by directional freeze drying.Using graphite oxide,benzotriazole and polyvinyl alcohol as raw materials,five composites of PVA,PVA-BTA,PVA-GO,PVA-GO-BTA,and PVA-GO/BTA were prepared by changing the ratios of reactants.The microstructure of the five foam composites was analyzed by SEM,XRD,Raman and other test methods.The results showed that BTA added to the matrix foams of PVA could make the pore structure more orderly and GO make PVA composite foam pore structure thicker.The adsorptive property of five composite foams were compared with the static adsorption method using metallic copper ions and organic dye xylenol orange as simulated wastewater.The results showed that PVA-GO-BTA exhibited the best performance in adsorbing copper ions.While PVA-GO/BTA has the better performance in adsorbing organic dyes xylenol orange.3.Study on catalytic performance of composite foam materials loading the precious metals.On the basis of the preparation of the composite foam,a variety of composite foams were prepared by loading precious metal gold and silver by two methods of direct addition and immersion.The SEM,Raman and XRD were used to characterize the microstructure of the prepared composite foam.The results showed that the pore structure of the composite foam changed after the addition of metal gold and silver,and the silver-loaded composite foam included silver nano particles,but the supported gold composite foam did not.Finally,the prepared foam-supported noble metal was used to catalyze the p-nitrophenol.The result of catalytic performance showed that the catalytic performance of the p-nitrophenol by the direct addition method better than that of the noble metal supported by the impregnation methodobviously.The performance is better than that of supported silver.PVA-GO/BTA-Au had the best catalytic effect on p-nitrophenol,while PVA-GO-BTA-Ag had the best catalytic effect on p-nitrophenol.