Novel mesoporous perovskite type oxide/silicon dioxide, and preparation method and application method thereof in water treatment

Abstract

The invention provides an effectiveness research on catalytic degradation of mesoporous perovskite type oxide / silicon dioxide to an ultraviolet stabilizing agent in water, belonging to a water treatment technology and the field of environment functional materials. A mesoporous perovskite type oxide / silicon dioxide catalyst has a shape of powder or particle; and by using a template agent--cetyl trimethyl ammonium bromide (CTAB), nitrate of metals, citric acid and an organic silicon source--tetraethoxysilane (TEOS) as main raw materials, a mesoporous perovskite type oxide catalyst is prepared, so the ability of degrading the ultraviolet stabilizer in a heterogeneous catalytic oxidation technology is improved. Directed at the problem of poor removal effect of conventional wastewater treatment on the ultraviolet stabilizing agent PBSA, the invention provides novel mesoporous perovskite type oxide / silicon dioxide as a catalyst, and realizes successful application of the novel mesoporous perovskite type oxide / silicon dioxide in a catalytic ozonation technology and a persulfate catalytic activation technology; meanwhile, by adopting an in-situ hydrothermal method for one-step synthesis of a mixture of a mesoporous material and perovskite type oxide, simple and convenient operation and excellent catalytic effect are obtained, and reinforced removal of difficultly-degrading pollutants is realized.

Description

technical field [0001] The invention relates to a preparation method of a novel perovskite oxide mesoporous material and its application method in water treatment technology. Background technique [0002] With the improvement of living standards, drugs and personal care products (Pharmaceutical and personal care products, PPCPs) are widely used in life. As one of the most important pollutants in PPCPs, UV stabilizers are attracting attention due to their increasing residual concentration. 2-Phenylbenzimidazole-5-sulfonic acid (PBSA) is an important class of UV stabilizers. Due to the special reactivity, physiological activity, structural properties and other excellent properties of this type of compound, it is widely used in functional materials , pesticides and pharmaceuticals. Studies have shown that UV stabilizers exist in various environmental media such as domestic sewage treatment plant sludge, and are difficult to completely treat in urban sewage treatment plants. ...

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Problems solved by technology

[0005] The present invention aims at the polluted water body containing the ultraviolet stabilizer PBSA, and in order to solve the problem of poor treatment effect of the existing conventional sewage, an innovative "one-step hydrothermal method" is proposed to prepare the perovskite oxide / SiO 2 Mesoporous materials, and used as catalysts in advanced oxidation water treatment systems for catalytic ozonation and activated persulfate water treatment, and for perovskite oxides / SiO 2 The preparation and application conditions of mesoporous materials are described

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