Dilute sulfuric acid and graphene oxide co-doped modified titanium dioxide composite material and preparation method and application thereof

Abstract

The invention discloses a dilute sulfuric acid and graphene oxide co-doped modified titanium dioxide composite material and a preparation method and application thereof. The preparation method comprises the following steps: (1) adding tetrabutyl titanate into ethanol to form a solution A, (2) preparing an ethanol-sulfuric acid solution to form a solution B, dropwise adding the solution B into thesolution A, and uniformly stirring to obtain a mixed solution, (3) reacting at constant temperature to obtain slurry, (4) centrifugally separating the slurry, and washing, drying and grinding to obtain powder, (5) calcining to obtain sulfuric acid-titanium dioxide, (6) preparing a graphene oxide dispersion liquid, (7) adding sulfuric acid-titanium dioxide into the graphene oxide dispersion liquidfor a reaction to form a suspension liquid, (8) carrying out constant-temperature reaction on the suspension to obtain a crude product, and (9) washing and drying the crude product to obtain the composite material. The preparation method is simple, low in cost and suitable for large-scale production. The prepared composite material is high in purity, can efficiently degrade tetracycline hydrochloride, and has good application value in the aspect of environmental pollution remediation.

Description

technical field [0001] The invention belongs to the field of titanium dioxide composite materials and water body treatment, and in particular relates to a modified titanium dioxide composite material co-doped with dilute sulfuric acid and graphene oxide for degrading tetracycline hydrochloride wastewater. Background technique [0002] Antibiotics can prevent diseases and promote growth, so they are widely used in disease treatment and animal husbandry production. my country is a big country in the production and use of antibiotics, but in fact, the antibiotics taken cannot be completely absorbed by the body, and most (about 30% to 90%) will be excreted in urine and feces in the form of mothers or metabolite daughters , and then pollute the environment, destroy ecological stability, and ultimately endanger human health. [0003] It has been reported that antibiotics are frequently detected in the waters of the Yangtze River, Taihu Lake, Pearl River, and the upper reaches of t...

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Problems solved by technology

Luo Fangyuan and others tested tetracycline and oxytetracycline in the sediments of Hongze Lake. These two antibiotics were detected in the sediment of the lake area, and the content range of the two antibiotics was 1.35-25.43 μg kg -1 ; Fang Longfei et al. investigated 6 typical antibiotics in the upper reaches of the Huangpu River in Shanghai, and found that the concentration of tetracycline antibiotics (the average value totaled 34.25-211.82ng·L -1 ) gradually increased from the wet season to the dry season in the upper reaches of the Huangpu River, and it was the main polluting antibiotic in the upper reaches of the Huangpu River; a total of 15 antibiotics in 5 categories were detected in water samples such as Wei Hong, and the average concentration of oxytetracycline in the downstream was the highest; Yanan et al. studied the pollution distribution of five major antibiotics in a typical small watershed of a town in the Yangtze River Delta. Among them, the detection rate of tetracyclic antibiotics (TCs) was 96.9%, and the concentration range was 27.10-133.0ng L -1 , concentrated in agricultural and industrial areas, with high ecological risk

[0004] Tetracycline antibiotics are excreted through feces and urine, causing serious water pollution

However, the effect of conventional water treatment processes on removing antibiotics is not significant. At present, the methods for removing antibiotic pollution in the water environment mainly include biodegradation, chemical oxidation and adsorption.

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