Magnetic TiO2/Fe3O4/C composite photocatalyst, and preparation method and application thereof
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A composite photocatalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc. Problems such as low utilization rate, to achieve the effect of improving recovery rate, enhancing photocatalytic performance and service life, and speeding up the rate
Inactive Publication Date: 2016-02-03
JIANGSU UNIV
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Problems solved by technology
The half-life of tetracycline in different water environments is 4.5 to 180 days, and it is very stable under acidic conditions. Therefore, tetracycline will accumulate in the process of repeated fertilization, which will not only cause water pollution, but also lead to the emergence of antibiotic-resistant pathogens, which in turn threaten human health.
But nano TiO 2 Photocatalysts have some practical problems
For example, it is easier to reunite during use, and the utilization rate of sunlight is not high, and because TiO 2 Belongs to the nanoscale, which makes the recovery of photocatalysts more difficult
Method used
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Embodiment 1
[0035] S1: Magnetic Fe 3 o 4 / Yeast preparation:
[0036] Weigh 22.5mL of ethylene glycol and 22.5mL of diethylene glycol and mix thoroughly, then add 0.1g of saccharomyces, 2.4g of ferric chloride (FeCl 3 ·6H 2 (2), 3.4g sodium acrylate and 3.4g sodium acetate, after ultrasonic reaction for 1h, transfer the uniform black reaction solution to a polytetrafluoroethylene-lined stainless steel autoclave, seal, heat to a temperature of 200°C for 10h, and the reaction ends After cooling to room temperature, the magnetic Fe was obtained after filtering, washing with ethanol and water for 3 times, and vacuum drying at 65°C for 10 h. 3 o 4 / yeast;
[0037] S2: Magnetic TiO 2 / Fe 3 o 4 / Yeast preparation:
[0038] Measure and mix 36mL of absolute ethanol, 3mL of deionized water and 1mL of concentrated hydrochloric acid to obtain a mixture A; put 36mL of absolute ethanol and 10mL of tetra-n-butyl titanate into a three-necked flask, and stir at 40°C for 15 minutes to obtain a m...
Embodiment 2
[0042] Step S1 and step S2 are the same as described in Embodiment 1,
[0043] S3: Magnetic TiO 2 / Fe 3 o 4 Preparation of / C:
[0044] Take 2g magnetic TiO 2 / Fe 3 o 4 / Yeast is placed in a tube furnace and calcined at a temperature of 400°C for 3h, the heating rate is 2°C / min, and N is fed throughout the calcination 2 Protection, after cooling, the product TiO is obtained 2 / Fe 3 o 4 / C-400.
Embodiment 3
[0046] Step S1 and step S2 are the same as described in Embodiment 1,
[0047] S3: Magnetic TiO 2 / Fe 3 o 4 Preparation of / C:
[0048] Take 2g magnetic TiO 2 / Fe 3 o 4 / Yeast is placed in a tube furnace, calcined at a temperature of 500°C for 3 hours, the heating rate is 2°C / min, and N is fed throughout the calcining 2 Protection, after cooling, the product TiO is obtained 2 / Fe 3 o 4 / C-500.
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Abstract
A provided preparation method for a magnetic TiO2 / Fe3O4 / C composite photocatalyst comprises the following steps: preparing magnetic Fe3O4 / microzyme; preparing magnetic TiO2 / Fe3O4 / microzyme, concretely, mixing anhydrous enthanol, deionized water and concentrated hydrochloric acid to obtain a mixed solution A, performing enclosed stirring on anhydrous ethanol and tetrabutyl titanate at 40 DEG C to obtain a mixed solution B, adding the mixed solution A into the mixed solution B drop by drop, then performing enclosed stirring, then opening the plug, starting to introducing N2 for protection, observing the sol, adding Fe3O4 / microzyme after the sol is formed, observing the gel, taking out the sample after the gel is formed, stopping to introduce N2, and performing ageing and drying on the sample, so as to obtain magnetic TiO2 / Fe3O4 / microzyme; and preparing magnetic TiO2 / Fe3O4 / C, concretely, putting the magnetic TiO2 / Fe3O4 / microzyme into a tubular furnace, calcining at a temperature of 300-600 DEG C for 1-5 h, controlling the heating rate to be 1-2 DEG C / min, introducing N2 for protection in the whole calcining process, and cooling, so as to obtain the product magnetic TiO2 / Fe3O4 / C. The preparation method is simple in operation and relatively low in cost, and is a green environment-friendly efficient processing technology.
Description
technical field [0001] The invention relates to the field of composite photocatalyst preparation, specifically a magnetic TiO 2 / Fe 3 o 4 / C composite photocatalyst and its preparation method and application. Background technique [0002] The term antibiotics represents a series of natural or semi-synthetic compounds with antibacterial activity, which are produced by microorganisms (bacteria, fungi, actinomycetes) or higher animals and plants in the course of life. A class of chemicals with developmental functions, which can be extended to antibacterial, antiviral, antifungal and antitumor compounds. The misuse of antibiotics and the use of subtherapeutic doses of antibiotics in agricultural activities make it one of the factors affecting human health. Antibiotics are usually used to inject or feed a class of drugs to resist animal or human diseases, but most antibiotics cannot be completely absorbed by the body, and about 90% of antibiotics pass through the feces and ur...
Claims
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