A preparation method of mesoporous perovskite oxide/silicon dioxide and its application method 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: 2018-01-23
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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  • A preparation method of mesoporous perovskite oxide/silicon dioxide and its application method in water treatment
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  • A preparation method of mesoporous perovskite oxide/silicon dioxide and its application method 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 mol 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 to 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 stainless steel reactor In the polytetrafluoroethylene lining, hydrothermal...

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Abstract

The invention provides a mesoporous perovskite oxide / silicon dioxide catalyzed degradation of the effectiveness of UV stabilizers in water, belonging to the fields of water treatment technology and environmental functional materials. The properties of the mesoporous perovskite oxide / silica catalyst can be powder or granule, and the template agent cetyltrimethylammonium bromide (CTAB), metal nitrate, citric acid and organosilicon source Ethyl silicate (TEOS) was used as the main raw material to prepare a mesoporous perovskite oxide catalyst to improve the degradation ability of the ultraviolet stabilizer PBSA in the heterogeneous catalytic oxidation technology. Aiming at the problem of poor removal effect of ultraviolet stabilizer PBSA in existing conventional sewage treatment, the present invention proposes a mesoporous perovskite oxide / silicon dioxide as a catalyst, and realizes its application in catalytic ozone oxidation technology and catalytic activation process. The successful application of sulfate technology, and the in-situ hydrothermal method is used to synthesize the mixture of mesoporous materials and perovskite oxides in one step, which is not only easy to operate, but also has good catalytic effect, and realizes the strengthening of refractory pollutants remove.

Description

technical field [0001] The invention relates to a preparation method of a perovskite type oxide mesoporous material and an 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 daily 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 plant...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C02F1/78
Inventor 齐飞张钰婷
Owner BEIJING FORESTRY UNIVERSITY
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