A method of lanthanum-based perovskite-type oxide catalyzed ozone degradation UV stabilizer in water

A UV stabilizer and perovskite-type technology, applied in the field of preparation of lanthanum-based perovskite-type oxides, can solve problems such as poor sewage treatment effect

Active Publication Date: 2018-02-13
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, in order to solve the problem of poor treatment effect of the existing conventional sewage, innovatively proposes the preparation of the perovskite oxide catalyst by the soft template method in the heterogeneous catalytic ozonation technology application, and explain the preparation and application conditions of the perovskite oxide catalyst prepared by the soft template method

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  • A method of lanthanum-based perovskite-type oxide catalyzed ozone degradation UV stabilizer in water

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specific Embodiment approach 1

[0011] Embodiment 1: The preparation method of the lanthanum-based perovskite oxide catalyst in this embodiment is as follows: (1) Weigh 0 to 2 g of cetyltrimethylammonium bromide (CTAB), dissolve it in 10 ~50ml of deionized water; (2) add 2~8mmol lanthanum nitrate and 2~8mmol cobalt nitrate to the above solution and stir, heat the solution to 60~80°C, and further stir for 30~60 minutes; (3) wait for the solution After the temperature drops to room temperature, add 4.0mol / L NaOH dropwise until the pH is 12-13, and the solution gradually becomes a suspension; (4) Stir the suspension at 60-80°C for 6-8 hours, and then stir at room temperature 10 to 14 hours; (5) drying, putting the amorphous precursor of the sample obtained in step (4) into an oven, and drying and crystallizing at 90 to 110°C; (6) calcining, and obtaining The dry powder is calcined at 700-800° C. for 3.8-4.2 hours; (7) cooling and naturally cooling down to room temperature.

[0012] The decontamination technolo...

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Abstract

The invention provides a method for preparing a lanthanum-based perovskite oxide with a high specific surface area by using a soft film plate and its application in catalytic ozone oxidation technology, which belongs to the field of water treatment technology and environmental functional materials. The lanthanum-based perovskite oxide is mainly made of surfactant CTAB and metal nitrate, and is prepared by precipitation method to improve the degradation ability of ultraviolet stabilizer PBSA in advanced oxidation technology. Aiming at the problem of poor removal effect of ultraviolet stabilizers in existing conventional sewage treatment, the present invention proposes a perovskite oxide prepared by soft template method as a catalyst, and realizes the application in advanced oxidation technology, overcoming traditional ozone oxidation The shortcomings of the catalyst not only realize the characteristics of simple process, low cost and less environmental pollution in the preparation of the catalyst, but also improve the ability of ozone decomposition to generate active free radicals, and realize the efficient removal of organic pollutants.

Description

technical field [0001] The invention relates to a preparation method of a lanthanum-based perovskite oxide and a method for catalyzing an ozone degradation ultraviolet stabilizer in water. Background technique [0002] As an active sunscreen ingredient, 2-phenylbenzimidazole-5-sulfonic acid (2-phenylbenzimidazole-5-sulfonic acid, PBSA) is one of the most essential pharmaceutical and personal care products (PPCPs). As a water-soluble sunscreen ingredient, PBSA is a trace organic pollutant with potential threats to the water environment. Relevant studies have shown that aquatic organisms such as fish will accumulate this pollutant in fat tissue, and it is likely to be transferred to the next generation. In addition, another hazard of sunscreen was found to contain ultraviolet absorbers in samples of newborn breast milk. PBSA is usually difficult to remove in sewage treatment plants designed and built to remove organic matter and some nutrients, or even has no removal effect....

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/10B01J37/03C02F1/78C02F101/38C02F103/36
Inventor 齐飞张钰婷
Owner BEIJING FORESTRY UNIVERSITY
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