Preparation method of photocatalytic coating material for treating volatile air pollutants

• Main Authors: LI YUE, YANG HUI, LIU JIE, JIANG LIBEI, SHENG JIANSONG, SHEN QIANHONG, FANG QINJIN
• Format: Patent
• Language: Chinese; English
• Published: 30.05.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to a photocatalytic material preparation technology, and aims to provide a preparation method of a photocatalytic coating material for treating volatile air pollutants. Comprising the following steps: adding a SnCl4 aqueous solution into a bismuth salt aqueous solution, then adding a nano ZnO dispersion liquid, and adjusting the pH value of the mixed liquid to 14; carrying out a hydrothermal reaction, carrying out centrifugal washing on a reaction product, and dispersing to obtain a porous microsphere dispersion liquid; adding an AgNO3 aqueous solution, placing in a dark box, and stirring; and filtering, drying and calcining to obtain the Ag-coated ZnO/Bi2Sn2O7 composite material. Deionized water is added for grinding, and Ag-coated ZnO/Bi2Sn2O7 slurry is obtained; and adding an emulsion, deionized water, a flatting agent and gas-phase SiO2, and continuously stirring to obtain the Ag-coated ZnO/Bi2Sn2O7 photocatalytic coating material. According to the composite material prepared by the