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Composite material and preparation method thereof

A composite material and mixed solution technology, applied in chemical instruments and methods, water treatment of special compounds, water/sludge/sewage treatment, etc., can solve problems such as low catalytic efficiency, achieve simple preparation method, increase degradation rate, improve The effect of mass transfer and conduction capacity

Pending Publication Date: 2022-01-21
白银新大孚科技化工有限公司 +1
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Problems solved by technology

[0003] The purpose of the present invention is: in order to solve single catalyst TiO 2 The technical problem of low catalytic efficiency, the present invention provides a composite material and its preparation method, in many delafossite type oxides, CuFeO 2 As a typical delafossite-type oxide CuFeO 2 With moderate light absorption, good stability and relatively high electrical conductivity, it is composed entirely of abundant atoms in the earth's crust, it is one of the few oxides with p-type behavior, and is stable under reducing conditions , the present invention to TiO 2 The addition of a p-type semiconductor material with a delafossite structure has a good inhibitory effect on the recombination of photogenerated electron-hole pairs, and significantly improves the TiO 2 photocatalytic performance

Method used

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  • Composite material and preparation method thereof

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Embodiment

[0029] a CuFeO 2 -TiO 2 The preparation method of composite material comprises the following steps:

[0030] (1) Weigh 2.0g of ferric nitrate and an appropriate amount of copper nitrate and tetrabutyl titanate, and add ferric nitrate, copper nitrate and tetrabutyl titanate to 200ml of absolute ethanol and acetic acid in a molar ratio of 1:1:1 In the mixed solution, the volume ratio of absolute ethanol and acetic acid is 1:1, the pH of the mixed solution is adjusted to 10 with sodium hydroxide solution, and ultrasonically dispersed for 30 minutes;

[0031] (2) Add 1.5ml of reducing agent propionaldehyde dropwise to the above mixed solution, and continue to stir vigorously for 30min;

[0032] (3) After the reaction kettle containing the mixed solution was subjected to hydrothermal reaction at 120° C. for 6 hours, it was naturally cooled and filtered;

[0033] (4) After filtering and washing, the filter cake is alternately washed with deionized water and absolute ethanol for 3...

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Abstract

The invention discloses a composite material and a preparation method thereof, and relates to the technical field of material synthesis. The preparation method of the CuFeO2-TiO2 composite material comprises the following steps: mixing and dissolving Fe (III) salt, Cu (II) salt and titanate in a mixed solution of absolute ethyl alcohol and acetic acid, carrying out ultrasonic dispersion, then adding a reducing agent, carryING out hydrothermal reaction, filtering, washing, drying, and calcining to obtain the CuFeO2-TiO2 composite material. According to the invention, a p-type semiconductor material with a delafossite structure is added into TiO2, so that a very good inhibition effect is achieved on compounding of photo-induced electron-hole pairs, and the photocatalytic performance of TiO2 is improved.

Description

technical field [0001] The invention relates to the technical field of material synthesis, and more specifically relates to a composite material and a preparation method thereof. Background technique [0002] TiO 2 As a semiconductor photocatalyst, it has the advantages of non-toxicity, no pollution, low cost, good chemical stability, long service life and high photocatalytic activity. Because of TiO 2 The band gap is wide (Eg=3.2eV), the utilization rate of sunlight is low, and the recombination rate of photogenerated carriers is high, which affects TiO 2 Application of heterogeneous photocatalytic reactions, thus a single catalyst TiO 2 Low catalytic efficiency, metal modification, non-metal modification, metal co-doping, non-metal co-doping and semiconductor recombination (In 2 o 3 -TiO 2 , Bi 2 MoO 6 / TiO 2 ,TiO 2 / ZnO,TiO 2 / SnO 2 , SrTiO 3 / TiO 2 ) and other methods are to improve TiO 2 main pathway for photocatalytic performance. Among them, the semico...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J35/00C02F1/30C02F101/30
CPCB01J23/002B01J23/745C02F1/30B01J2523/00C02F2305/10C02F2101/308B01J35/39B01J2523/17B01J2523/47B01J2523/842
Inventor 王军王军辉窦小征张析王进龙张龙军李飞焦晓斌王鲁博王源瑞夏青岳运盛
Owner 白银新大孚科技化工有限公司
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