Preparation method and application of supported double-doped modified titanium dioxide photocatalyst

Abstract

The invention discloses a preparation method and application of a supported double-doped modified titanium dioxide photocatalyst, and relates to a preparation method and application of a titanium dioxide photocatalyst. The invention aims to solve the problem of poor photocatalytic effect of a TiO2 photocatalyst. The method comprises the following steps: adding tetratincture titanate into absoluteethyl alcohol to obtain a mixed solution A; mixing absolute ethyl alcohol, deionized water and absolute acetic acid, adding copper nitrate and urea, and adjusting the pH value to 1-3 to obtain a solution B; adding the solution B into the solution A to obtain a solution C; and plating the solution C on a cleaned carrier. According to the invention, the supported double-doped modified titanium dioxide photocatalyst prepared by the method is placed in sewage containing bacteria when the bacteria are subjected to photocatalytic inactivation, and sterilization treatment is carried out for 10-30 seconds under the irradiation of an ultraviolet lamp; the photocatalytic effect is improved, the inactivation effect of microorganisms is improved, the preparation method is simple and rapid, and the rawmaterials are wide in source and low in price; and the catalyst is suitable for preparing the titanium dioxide photocatalyst and inactivating bacteria.

Description

technical field

[0001] The invention relates to a preparation method and application of a titanium dioxide photocatalyst. Background technique

[0002] Ship ballast water ensures the safe and stable navigation of ocean-going ships. The ballast water itself is harmless, but it carries a large number of bacteria and viruses. The spread of geographically isolated water bodies will affect the local marine biological species, population structure, Food chain structure, biodiversity, etc. have a series of impacts, threatening fishery production, economy, and marine ecological security. Ship ballast water has been identified by the Global Environment Fund and the International Maritime Organization as one of the four major threats to the marine environment.

[0003] At present, photocatalytic technology has been widely used, especially in the field of environmental protection, it has been optimized and promoted as a clean technology. where TiO 2 Photocatalyst is considered to be...

Examples

specific Embodiment approach 1

[0023] Specific embodiment one: the preparation method of the supported double-doped modified titanium dioxide photocatalyst in this embodiment is carried out according to the following steps:

[0024] 1. Under the conditions of 25-35°C constant temperature water bath and magnetic stirring, slowly add tetratincture of titanate into absolute ethanol, and continue magnetic stirring for 10-50 minutes to obtain a light yellow mixed solution A;

[0025] 2. Mix absolute ethanol, deionized water and anhydrous acetic acid to obtain a mixed solution, add copper nitrate and urea to the mixed solution, mix well, adjust the pH of the mixed solution to 1-3 with concentrated nitric acid, and obtain solution B;

[0026] 3. Slowly add solution B to solution A in a constant temperature water bath at 25-35°C and magnetic stirring, and continue magnetic stirring for 40-80 minutes to obtain solution C;

[0027] 4. Seal the solution C and let it stand for 2-4 hours, and then use the dipping and pu...

specific Embodiment approach 2

[0032] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the volume ratio of absolute ethanol and tetratincture of titanate in Step 1 is (28-252): (6-54).

specific Embodiment approach 3

[0033] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the volume ratio of absolute ethanol, deionized water and anhydrous acetic acid described in step two is (14-126): (2-18): (4-36).

technical field

[0001] The invention relates to a preparation method and application of a titanium dioxide photocatalyst. Background technique

[0002] Ship ballast water ensures the safe and stable navigation of ocean-going ships. The ballast water itself is harmless, but it carries a large number of bacteria and viruses. The spread of geographically isolated water bodies will affect the local marine biological species, population structure, Food chain structure, biodiversity, etc. have a series of impacts, threatening fishery production, economy, and marine ecological security. Ship ballast water has been identified by the Global Environment Fund and the International Maritime Organization as one of the four major threats to the marine environment.

[0003] At present, photocatalytic technology has been widely used, especially in the field of environmental protection, it has been optimized and promoted as a clean technology. where TiO 2 Photocatalyst is considered to be...

Examples

specific Embodiment approach 1

[0023] Specific embodiment one: the preparation method of the supported double-doped modified titanium dioxide photocatalyst in this embodiment is carried out according to the following steps:

[0024] 1. Under the conditions of 25-35°C constant temperature water bath and magnetic stirring, slowly add tetratincture of titanate into absolute ethanol, and continue magnetic stirring for 10-50 minutes to obtain a light yellow mixed solution A;

[0025] 2. Mix absolute ethanol, deionized water and anhydrous acetic acid to obtain a mixed solution, add copper nitrate and urea to the mixed solution, mix well, adjust the pH of the mixed solution to 1-3 with concentrated nitric acid, and obtain solution B;

[0026] 3. Slowly add solution B to solution A in a constant temperature water bath at 25-35°C and magnetic stirring, and continue magnetic stirring for 40-80 minutes to obtain solution C;

[0027] 4. Seal the solution C and let it stand for 2-4 hours, and then use the dipping and pu...

specific Embodiment approach 2

[0032] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the volume ratio of absolute ethanol and tetratincture of titanate in Step 1 is (28-252): (6-54).

specific Embodiment approach 3

[0033] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the volume ratio of absolute ethanol, deionized water and anhydrous acetic acid described in step two is (14-126): (2-18): (4-36).

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