Method for preparing titanium dioxide and sepiolite composite material

A composite material and titanium dioxide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of low photoactivity, large amount of catalysts, difficult to recycle, etc., and achieve high photocatalytic performance , easy recycling effect

Inactive Publication Date: 2015-05-27
张达
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  • Summary
  • Abstract
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Problems solved by technology

Directly using powdered TiO2 for photocatalytic oxidation reaction, although it can effectively oxidize many refractory organic substances in water, achieve detoxification, decolorization, deodorization until completely degraded into CO2 sub> and H2O and other inorganic small molecules, but the suspension phase photocatalytic oxidation method usually has problems such as difficulty in separation from water, large amount of catalyst, low photoactivity, short life, and difficult to recycle.

Method used

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specific Embodiment

[0008] Specific embodiment: the preparation process of the present invention comprises the following steps: 1. the sepiolite is modified, and the sepiolite is soaked in deionized water for 20-30min, the scum is separated, filtered, and then the sepiolite is 1.0mol / L of HCl solution was leached at a constant temperature of 70C for 10 hours, and the liquid-solid ratio was controlled to be 10:1. Then wash with distilled water, vacuum filter, remove calcium and chloride ions, until there is no white precipitate in the test solution with AgNO3 solution, dry the filtrate, calcined at 500C for 5-6h, take it out and cool it down to room temperature naturally, then the modified product is obtained. Sepiolite, its preparation process is sepiolite-soaking-removing scum-filtering-acid treatment-filtering-drying-500C burning-cooling-modified sepiolite;

[0009] 2. Load TiO2 2 , Dissolve 4mL of butyl titanate in 13.4mL of absolute ethanol at room temperature to prepare a butyl titanate / ab...

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Abstract

The invention discloses a method for preparing a titanium dioxide and sepiolite composite material, belonging to the field of preparation of photocatalytic materials. Aiming at the problems that the directly used powdered TiO2 is large in amount, low in optical activity and short in service life and is difficultly recycled, the invention provides the method for preparing the titanium dioxide and sepiolite composite material which is high in photocatalytic performance and easy to recycle. The preparation method comprises the following steps: preparing TiO2 nano-sol by adopting a sol-gel method, loading TiO2 onto the surface of sepiolite by adopting an impregnation method, thereby obtaining the titanium dioxide and sepiolite composite material. The preparation method is simple in process, and the prepared titanium dioxide and sepiolite composite material is high in photocatalytic performance and easy to recycle and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of photocatalytic material preparation. Background technique [0002] As a new water treatment technology, photocatalytic oxidation has potential advantages such as high efficiency and low consumption. TiO 2 Due to its stable photochemical properties, high efficiency and low cost, it is widely used as photocatalyst. Direct use of powdered TiO 2 Photocatalytic oxidation reaction, although it can effectively oxidize many refractory organic substances in water, achieve detoxification, decolorization, deodorization until completely degraded into CO 2 and H 2 O and other inorganic small molecules, but usually the suspension phase photocatalytic oxidation method has problems such as difficulty in separating from water, large amount of catalyst, low photoactivity, short life, and difficult to recycle. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing a titaniu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/16
Inventor 张娜
Owner 张达
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