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

A perovskite type, silicon dioxide technology, applied in the direction of oxidized water/sewage treatment, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve the problems of poor treatment effect and achieve high efficiency The effect of removal

Active Publication Date: 2016-07-27
BEIJING FORESTRY UNIVERSITY
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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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  • Novel mesoporous perovskite type oxide/silicon dioxide, and preparation method and application method thereof in water treatment
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  • Novel mesoporous perovskite type oxide/silicon dioxide, and preparation method and application method thereof in water treatment

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specific Embodiment approach 1

[0014] Specific implementation mode 1: perovskite oxide / SiO 2The preparation method of mesoporous material is: (1) Preparation of CTAB solution, weigh 1.0g ~ 4.0g cetyltrimethylammonium bromide (CTAB), add 60 ~ 120mL deionized water as solvent, ultrasonic 30 ~ 60min to its complete dissolution; (2) preparation of silicon source and active metal solution, add 2.0~10.0mmol lanthanum nitrate, 2.0~10.0mmol cobalt nitrate, 6.0~30.0mmol citric acid (the molar ratio of metal / citric acid=1 / 3), tetraethyl orthosilicate (TEOS) was slowly added dropwise to the solution described in (1) at a molar ratio n(CTAB) / n(TEOS)=0.12, and stirred at room temperature for 24h; (3) to ( 2) Add NaOH with a concentration of 2.0M dropwise into the solution, adjust the pH of the solution to 10.5-11.5 and continue to stir at room temperature for 10-14 hours; (4) hydrothermal reaction, transfer the solution obtained in step (3) to the poly In tetrafluoroethylene lining, hydrothermal reaction at 90-100 ℃ f...

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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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Application Information

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IPC IPC(8): B01J23/83C02F1/78
Inventor 齐飞张钰婷
Owner BEIJING FORESTRY UNIVERSITY
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