Preparation and adsorption properties of nano-graphene oxide/tourmaline composites

Abstract

This research addresses the asphalt smoke emission in the process of asphalt pavement construction. The nano-graphene oxide (GO)/tourmaline composites were prepared to alleviate the asphalt smoke emission and improve the construction environment. The macrocharacteristics and micromorphology of the composites were analyzed, and their optimal preparation process was determined. Using material microanalysis methods, such as X-ray diffractometer, Raman spectroscopy, and Fourier transform infrared spectrometer, the structural characteristics and material composition of the composites were studied. The adsorption properties of the composites on asphalt smoke were clarified. It will provide technical support for the improvement of infrastructure construction environment. The results show that 3-aminopropyl triethoxysilane is superior than hexadecyl trimethyl ammonium bromide in surface modification of tourmaline. During the composite process, surface modifiers and GO had no significant effect on the structure of tourmaline. GO could enhance the adsorption properties of tourmaline on asphalt smoke. When the GO content was 1.5 wt%, the improvement was the largest, which is 17.42%. At that time, the emission-reduction rate of asphalt smoke reached 41.11%.

Keywords

• nanocomposites
• graphene oxide
• tourmaline
• adsorption properties