The invention relates to the field of automotive
tail gas purification, and discloses a road
coating for purifying automotive
tail gas and a preparation method of the
coating. The preparation method comprises the following steps: (1) uniformly mixing nano
titanium dioxide and diatomite
powder; (2) carrying out
laser welding on the mixed
powder by adopting a
laser scanning technology to obtain diatomite welded and supported nano
titanium dioxide; and (3) uniformly mixing water,
wollastonite powder, limestone,
methyl cellulose, water-borne
epoxy resin glue,
bentonite, a dispersing agent, a defoaming agent and the diatomite welded and supported nano
titanium dioxide to obtain the road
coating for purifying the automotive
tail gas. According to the method provided by the invention, the diatomite is loaded with nano
titanium dioxide through glass powder assistance and
laser welding, the process is green and
pollution-free, the production efficiency is high, the loading is firmer, the nano
titanium dioxide does not easily fall off, the further prepared road coating has strong adsorption capacity, a large amount of the tail gas can be adsorbed on the surfaces of catalyst particles, the degradation efficiency of the tail gas is improved, and the actual industrial application of a
photocatalysis technology is broadened.