Preparation and Corrosion Resistance Performance of Graphene Oxide/SiO2 Coatings on LAS Glass
In the present work,the graphene oxide(GO)/tetraethyl orthosilicate(TEOS)aqueous solution was prepared by the sol-gel method after investigating the dispersibility of GO in water and ethanol,the complex dispersion of GO powder and its water solution in the hydrolysate of TEOS.The surface and cross section morphology,element distributions of the composite film were analyzed.The influence of GO/SiO2 film on the corrosion resistance of the glass was studied.The results show that 0.05 g GO can be well dispersed into 15 mL deionized water,and a uniform coating solution can be obtained with further TEOS hydrolysate addition.After heat treatment at 600℃for 2 h and under N2 atmosphere,dense GO/SiO2 film can be obtained.The carbon element analysis shows graphene oxide was homogeneously distributed in the film.The corrosion behavior comparison of non-coated,SiO2 film coated and GO/SiO2 composite film coated LAS glass in HCl(1 mol/L)solution and NaOH(5％,massfraction)solution confirmed that GO/SiO2 composite film can improve the acid corrosion resistance of LAS glass.
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