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A technology of photocatalyst and nano-titanium dioxide, which is applied in separation methods, chemical instruments and methods, gas treatment, etc., and can solve problems such as limiting the application environment and application range of photocatalysts
Inactive Publication Date: 2017-12-15
广州市澳米环保科技有限公司
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However, the vast majority of photocatalysts do not work on visible light and infrared light other than ultraviolet rays, which greatly limits the application environment and scope of photocatalysts.
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[0032] The present invention also provides a method for preparing the photocatalyst, comprising:
[0033] Steps for preparing titanium dioxide sol: add tetrabutyl titanate solution into absolute ethanol, prepare tetrabutyl titanate ethanol solution with a weight percentage of 12-18%, and prepare deionized water and Ethanol mixed solution, drop the same volume of deionized water and ethanol mixed solution into the tetrabutyl titanate ethanol solution, stir while dropping, keep the solution temperature at 28-30°C, wait until the deionized water and ethanol mixed solution is completely After dripping the tetrabutyl titanate ethanol solution, continue stirring for 2-3 hours to obtain a uniform and transparent titanium dioxide sol;
[0034] Steps for preparing silica sol: add ethyl orthosilicate to absolute ethanol, prepare ethyl orthosilicate ethanol solution with a weight percentage of 10-15%, and prepare deionized water at a ratio of 1:2 by volume Mixed solution with ethanol, d...
Embodiment 1-5
[0046] Embodiment 1-5 photocatalyst
[0047] The raw materials are weighed according to the ratio in Table 1 respectively, and the photocatalyst is prepared according to the following steps, the difference is that the added raw material ratio is different, see Table 1 for details:
[0048] Table 1 The raw material proportion table of embodiment 1-3 and comparative example 1-3
[0049]
[0050] The preparation method of photocatalyst is as follows, comprising,
[0051] Steps for preparing titanium dioxide sol: add tetrabutyl titanate solution into absolute ethanol, prepare tetrabutyl titanate ethanol solution with a weight percentage of 12-18%, and prepare deionized water and Ethanol mixed solution, drop the same volume of deionized water and ethanol mixed solution into the tetrabutyl titanate ethanol solution, stir while dropping, keep the solution temperature at 28-30°C, wait until the deionized water and ethanol mixed solution is completely After dripping the tetrabutyl...
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Abstract
The invention discloses a photocatalyst and a preparing method thereof. The photocatalyst is prepared from, by weight, 78-85 parts of nanometer titania, 8-15 parts of nanosilicon dioxide, 0.5-2.5 parts of cerium and lanthanum composite rare earth material and 1-4.5 parts of nanometer silver-zinc antibacterial agent. The preparing method includes the steps of preparing titanium dioxide sol, preparing silicon dioxide sol, mixing the titanium dioxide sol and the silicon dioxide sol, preparing the cerium and lanthanum composite rare earth material, preparing the nanometer silver-zinc antibacterial agent, adding the nanometer silver-zinc antibacterial agent and the cerium and lanthanum composite rare earth material and conducting ageing, drying, grinding and sintering. The photocatalyst is applied in building materials, is adsorbed to the surface of an object to form a stable coating according to the nanometer characteristic of the solidified photocatalyst, effectively restrains bacteria and purifies air and is long lasting in effect and not corrosive to the building materials. It is found through research that the antibacterial performance of the photocatalyst can be easily improved due to the doping of rare earth elements and the nanometer silver-zinc antibacterial agent.
Description
technical field [0001] The invention relates to the field of new building materials, more specifically, to a photocatalyst suitable for spraying on the surface of walls, furniture, cloth, plastics, etc. in furniture, public places, and vehicles, and a preparation method thereof. Background technique [0002] People living in cities spend half of their day in the indoor spaces of various buildings. Therefore, indoor space is an important place for people to live and move. Over the years, researchers from all over the world have come to this conclusion after studying data and materials. Therefore, the impact of air quality inside buildings on human life and health has attracted more and more attention and attention from domestic and foreign experts in recent years. There are many types of chemical substances that pollute indoor air quality. In the 1990s, some developed countries in the world listed some pollutants that can have a great impact on human health. The chemical sub...
Claims
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