Visible-light-induced photocatalyst and preparation method and application thereof

• Main Authors: CHEN YUDONG, JIANG RUOLIN, YAN JINGCHUN
• Format: Patent
• Language: Chinese; English
• Published: 29.12.2020
• 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 visible-light-induced photocatalyst and a preparation method and application thereof. The preparation method comprises the following steps: adding a hydrochloric acid solution into titanium tetrachloride, uniformly stirring, adding a sodium carbonate solution until the pH value is 9.0, carrying out suction filtration, and washing to obtain amorphous titanium dioxide; andcontinuously adding hydrochloric acid until the pH value is 1.0, introducing nitrogen to discharge dissolved oxygen, adding sodium sulfide and a ferrous sulfate oxygen-free aqueous solution, implementing stirring, and putting an emulsion into a hydrothermal reaction kettle to react, thereby obtaining the nano ferrous sulfide/titanium dioxide composite material. The catalyst can react with formaldehyde and volatile organic compounds under the effect of natural light and visible light to degrade formaldehyde and volatile organic compounds in air. The catalyst has the advantages of simple preparation method, mild synthe