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Preparation method of coral reef-shaped TiO2 (C) material, product and application of coral reef-shaped TiO2 (C) material

A coral reef and raw material technology, applied in the field of photocatalytic material preparation, can solve the problems of wastewater treatment separation and recovery difficulties, low catalytic activity, doping, etc., and achieve the effects of green development, uniform products, and high photocatalytic removal efficiency

Pending Publication Date: 2021-07-02
GUIZHOU MATERIAL IND TECH INSTITUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To this end, researchers have tried various methods to solve these problems, such as ion doping, morphology regulation, noble metal loading and heterostructure construction, etc., but the catalytic activity is still low.
[0005] At the same time, TiO 2 It is a new type of inorganic functional material with strong oxidizing and reducing properties. It has a good ability to remove organic matter in water, but it has problems such as separation and recovery difficulties in actual wastewater treatment.

Method used

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  • Preparation method of coral reef-shaped TiO2 (C) material, product and application of coral reef-shaped TiO2 (C) material
  • Preparation method of coral reef-shaped TiO2 (C) material, product and application of coral reef-shaped TiO2 (C) material
  • Preparation method of coral reef-shaped TiO2 (C) material, product and application of coral reef-shaped TiO2 (C) material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a coral reef-like TiO for photocatalytic degradation of tetracycline 2 (C) Preparation method of material:

[0037] (1) After crushing the raw material corn stalks to 20 mesh, wash them three times with deionized water and ethanol respectively, and dry them in a vacuum oven at 60°C for 48 hours to obtain dry clean corn stalks;

[0038] (2) Carbonize clean corn stalks under the protection of N2 in an atmosphere tube furnace, N2 filling rate: 100mL / min, heating rate: 8°C / min, carbonization temperature: 500°C, carbonization time: 7h, and different Homemade corn stalk biochar at low temperature;

[0039] (3) Weigh 1.0±0.01g of the self-made corn stalk biochar and add it to 8mL of absolute ethanol solution, stir the mixed solution at 500r / min for 30min, slowly add 4 mL of tetraisopropoxy Titanium, continue to stir for 2h to obtain solution A;

[0040] (4) 4 mL of glacial acetic acid and 4 mL of absolute ethanol were mixed evenly with 500 r / min mag...

Embodiment 2

[0047] The coral reef shape TiO that embodiment 1 makes 2 (C) Material photocatalytic degradation of tetracycline (TC), including the following steps:

[0048] (1) pipette 100mL initial concentration is the tetracycline solution of 25ppm, add the coral reef shape TiO obtained in embodiment 1 2 (C) Material, coral reef-like TiO 2 (C) The amount of material used is 0.15g, and it is stirred at 500r / min for 30min in the dark at room temperature;

[0049] (2) After the photocatalytic reaction (ultraviolet light power is 7W) in the photocatalytic reactor for 2h, the coral reef-like TiO 2 (C) The material is separated from the solution, and the absorbance of the tetracycline solution is measured at 350 nm with a spectrophotometer, and the calculated degradation rate reaches 83%.

[0050] Among the present invention, the calculation method of degradation rate is: according to the calculation formula of degradation rate: D=[(A 0 -A t ) / A 0 ]× 100%, where: A 0 is the initial abso...

Embodiment 3

[0052] (1) Under the conditions of Example 2, explore the impact of the initial concentration of tetracycline solution on the catalytic effect, the specific steps are as follows:

[0053] Pipette 100mL initial concentration to be the tetracycline solution of 10,15,20,25,30ppm, add the coral reef shape TiO that obtains in embodiment 1 2 (C) Material, coral reef-like TiO 2 (C) The amount of material used is 0.15g, and it is stirred at room temperature for 30 minutes in the dark, and then the photocatalytic reaction is carried out in a photocatalytic reactor. After 2 hours, the coral reef-like TiO 2 (C) The material is separated from the solution, and the absorbance of the tetracycline solution is measured at 350nm with a spectrophotometer, and the degradation rate is calculated as shown in Table 1:

[0054] Table 1 Coral reef-like TiO 2 (C) Degradation rate of materials to different tetracycline concentrations

[0055]

[0056] It can be seen from Table 1 that the coral re...

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Abstract

The invention discloses a preparation method of a coral reef-shaped TiO2 (C) material as well as a product and application of the coral reef-shaped TiO2 (C) material. The preparation method comprises the following steps: carrying out carbonization treatment on pretreated corn straws to prepare a corn straw biochar skeleton; adding a corn straw biochar skeleton into an absolute ethyl alcohol solution, uniformly stirring, slowly adding titanium tetraisopropoxide, and continuously stirring to obtain a solution A; mixing glacial acetic acid and absolute ethyl alcohol, and uniformly stirring to obtain a solution B; and slowly adding the solution B into the solution A at room temperature, uniformly stirring to obtain a mixed solution, carrying out vacuum impregnation at 60-80 DEG C for 10-12 hours, and calcining the dried sample at 500-600 DEG C for 6-7 hours to obtain the coral reef-shaped TiO2 (C) material. The prepared TiO2 (C) with the coral reef-shaped structure provides more channels for electron transfer, more active sites can be easily exposed, compounding of photo-induced electron-hole pairs is inhibited, and the photocatalytic removal efficiency of selected tetracycline model molecules is high.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic material preparation, and in particular relates to a coral reef-like TiO 2 (C) Preparation methods and products of materials and their applications. Background technique [0002] Soil and water pollution is one of the major challenges facing contemporary society, and effective methods and related technologies are needed to solve these problems. Drugs Antibiotics have been used extensively in human and animal therapy. However, the presence of antibiotic pollutants in soil and water poses a great threat to human health and the balance of ecosystems. [0003] Therefore, how to remove antibiotic pollutants from soil and wastewater has become a hot issue in research. Among numerous antibiotics, tetracycline (TC) is widely used in human aquaculture and veterinary medicine, and is often detected in surface and groundwater environments, which is one of the main sources of antibiotic contaminatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/00B01J35/02B01J37/00B01J37/08C02F1/30C02F101/34C02F101/38
CPCB01J21/063B01J37/0018B01J37/084C02F1/30C02F2101/38C02F2101/34C02F2305/10B01J35/50B01J35/39
Inventor 安明泽薛斌王盛陈蔚洁张兵兵杨照徐国敏
Owner GUIZHOU MATERIAL IND TECH INSTITUE
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