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Compound photocatalyst and its production process and composition

A manufacturing method and technology of photocatalysts, which are applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., and can solve the problems of particle agglomeration, affecting the efficacy of photocatalysts, and environmental pollution.

Inactive Publication Date: 2008-10-08
ETERNAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the starting materials are expensive, and a large amount of organic solvents are required, which is easy to cause environmental pollution. In addition, high-temperature calcination will cause particles to agglomerate and affect the efficacy of photocatalysts.

Method used

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  • Compound photocatalyst and its production process and composition
  • Compound photocatalyst and its production process and composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 3.9M 200ml titanium tetrachloride solution, add water to dilute to a total volume of 2000ml, add 500ml (5M) ammonia water dropwise, filter the resulting white titanium dioxide hydrate, wash three times with 200ml deionized water, and remove excess water , white gel titanium hydroxide hydrate [TiO(OH) 2 】.

[0031] Add 60ml of concentrated sulfuric acid (18M) into the above hydrate, stir for 30 minutes to obtain a transparent and clear titanium sulfate solution, put the titanium sulfate solution in a reaction kettle, raise the temperature to 100°C, and react for 5 hours. Add 25 grams of SiO in the obtained titanium sulfate 2 Aqueous solution (20%), stirred at room temperature for 1 hour.

[0032] Drop into 700ml (5M) sodium hydroxide aqueous solution, filter, wash and dry under room temperature, can obtain white powder, detect through XRD and FE-SEM, white powder is anatase type photocatalyst, particle diameter is 15-19nm.

[0033] The obtained anatase titanium ...

Embodiment 2

[0036] Repeat the steps of Example 1, but use 50 grams of SiO instead 2 Aqueous solution (20%). The test results are shown in Table 1 and Table 2 below.

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Abstract

The present invention provides one kind of compound photocatalyst, which is photocatalyst coated with inorganic particles accounting for 3-70 wt% of the total solid weight. The compound photocatalyst has excellent super hydrophilicity, lasting acting, high antibacterial capacity, high deodorizing effect and high safety. In addition, the present invention provides also the production process and composition of the compound photocatalyst.

Description

technical field [0001] The invention relates to a composite photocatalyst, its preparation method and its composition. Background technique [0002] Photocatalyst has the function of absorbing light to excite electrons, so it has photocatalytic performance. After the photocatalyst material is excited by light, it activates water vapor molecules or oxygen molecules in the air to form hydroxyl radicals or negative oxygen ions, and performs redox to decompose pollutants in the environment, which can be applied to remove air or wastewater It can also inhibit the bacteria attached to the surface and achieve antibacterial effect. [0003] Titanium dioxide (TiO 2 ) as a photocatalyst for photocatalytic reactions began in 1972 with the research results of photocatalyst electrodes decomposing water to produce hydrogen and oxygen published by professors Akira Fujishima and K.Honda of the University of Tokyo in Japan. the gate. In 1995, after Professor Fujishima published the resea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J23/02B01J23/06B01J37/02
Inventor 黄俊伟叶茂荣
Owner ETERNAL MATERIALS CO LTD