Preparation method of peroxy-coordinated multi-oxygen-vacancy TiO2 and application of peroxy-coordinated multi-oxygen-vacancy TiO2 in photocatalysis

• Main Authors: LIU JUMING, HOU ZEBIN, MA LISHA, A SHAN
• Format: Patent
• Language: Chinese; English
• Published: 05.03.2024
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; INORGANIC CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a preparation method of peroxy-coordinated multi-oxygen-vacancy TiO2, which comprises the following steps: carrying out hydrothermal reaction on titanyl sulfate in the presence of a compound dispersant to obtain sulfate-coordinated oxygen-vacancy TiO2; and then carrying out oxidation treatment of hydrogen peroxide under a water bath condition to obtain the product peroxy-coordinated multi-oxygen-vacancy TiO2. Through substitution of coordinated sulfate radicals and surface hydroxyl groups, a peroxy coordination structure is formed on the surface of oxygen-deficient TiO2, and meanwhile, surface oxygen vacancy defects are remarkably increased. The light response range is obviously expanded; and the oxidation capacity of a photo-generated hole is enhanced. Besides, separation of photon-generated carriers is effectively promoted by the added strong electron withdrawing effect of oxygen vacancies and peroxy groups, the photocatalytic degradation activity of oxygen-deficient TiO2 on phenol u