Self-cleaning carbon negative biochar heat-insulation plastering mortar and preparation method thereof

The invention discloses self-cleaning carbon negative biochar heat-insulation plastering mortar and a preparation method thereof, and relates to carbon negative light plastering mortar and a preparation method thereof. The invention aims to solve the technical problems of low CO2 emission reduction, low strength and low functionality of the existing charcoal cement plastering mortar. The self-cleaning carbon negative charcoal heat insulation plastering mortar disclosed by the invention is prepared by uniformly mixing TiO2-CeO2 nanoparticles, charcoal, ASTM I type ordinary Portland cement and metakaolin. The preparation method comprises the following steps: 1, preparing biochar by taking agricultural wastes as raw materials; (2) preparing a TiO2-CeO2 nano catalyst; and 3, preparing the plastering mortar. The plastering mortar has the capability of synergistically utilizing light energy and heat energy, has various properties of high strength, carbon negative property, self-cleaning and heat insulation, and can