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Preparation method and application of Ce/N co-doped TiO2/acid-leached diatomite composite spheres

A technology of diatomite and co-doping, applied in chemical instruments and methods, water/sludge/sewage treatment, chemical/physical processes, etc., can solve environmental pollution and other problems

Pending Publication Date: 2020-01-10
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the production of antibiotics will be accompanied by a large amount of waste water, which often contains antibiotic components. If it is directly discharged into the natural environment without treatment, it will cause serious pollution to the environment.

Method used

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  • Preparation method and application of Ce/N co-doped TiO2/acid-leached diatomite composite spheres
  • Preparation method and application of Ce/N co-doped TiO2/acid-leached diatomite composite spheres
  • Preparation method and application of Ce/N co-doped TiO2/acid-leached diatomite composite spheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 Ce / N co-doped TiO 2 / Acid dipped diatomite composite sphere (CNTD-G for short)

[0038] (1) Preparation of CNTD-G with different Ce doping amounts

[0039] 1) Acid soaking diatomite preparation method: Weigh diatomite raw soil, according to the solid-to-liquid ratio of 1.0g:2.5mL, add dilute sulfuric acid solution with a concentration of 15wt%, and mix the diatomite raw soil and dilute sulfuric acid evenly , keep the mechanical stirring state at room temperature for 24 hours. Afterwards, it was washed with deionized water until neutral, and dried at 80° C. to obtain acid-leached diatomite treated with dilute sulfuric acid.

[0040] 2) Mix 5.0g of acid soaked diatomite with 70.0mL of absolute ethanol and 5.0mL of glacial acetic acid, stir mechanically for 30min, then add 8.0mL of tetra-n-butyl titanate and 1.0mL of ethylene glycol amine dropwise, and continue stirring A suspension was formed.

[0041] Another 2.8g of urea, 24.0mL of absolute ethanol and 8.0...

Embodiment 2

[0073] Example 2 Ce / N co-doped TiO 2 / Application of acid-leached diatomite composite spheres in the degradation of organic dyes under visible light

[0074] Using rhodamine B as the target degradation product, the visible light catalytic activity of co-doped composite spheres was investigated, and the photodegradation process was as follows: figure 1 .

[0075] The method is as follows: 1.0 g of CNTD-G with different Ce-doped amounts prepared in Example 1 was added to 200.0 mL of rhodamine B solution with a concentration of 0.01 g / L, and the dark adsorption process was carried out for 30 min to make the whole system When the dynamic adsorption equilibrium is reached, it is then placed under visible light (xenon lamp) with a power of 150W for photocatalytic degradation for 180min.

[0076] 1. Research on visible light catalytic activity

[0077] Rhodamine B was used as the target degradation product to examine the visible light catalytic activity of co-doped composite spheres...

Embodiment 3

[0083] Example 3 Ce / N co-doped TiO 2 / Application of acid-leached diatomite composite spheres in the degradation of polycyclic substances under visible light

[0084] Using tetracycline hydrochloride (TC) as the target degradation product, the visible light catalytic activity of co-doped composite spheres was investigated.

[0085] The method is as follows: add the CNTD-G prepared in Example 1 to the TC aqueous solution with an initial concentration of 20.0 mg / L and a pH value of 6, and the addition amount is 5.0 g / L. First, carry out a dark adsorption process for 30 minutes, so that the whole system reaches Dynamic adsorption equilibrium, and then placed under visible light (xenon lamp) with a power of 150W for photocatalytic degradation for 240min.

[0086] 1. Degradation of TC by co-doped composite spheres CNTD-G with different Ce doping amounts

[0087] Figure 12 It is the corresponding TOC analysis result of the visible light degradation experiment of co-doped sphere ...

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Abstract

The invention relates to a preparation method and an application of Ce / N co-doped TiO2 / acid-leached diatomite composite spheres. The preparation method comprises the following steps: mechanically stirring acid-leached diatomite, anhydrous ethanol and glacial acetic acid, and sequentially dropwise adding tetra-n-butyl titanate and ethylene glycol amine to form a suspension; dropwise adding a mixedsolution of cerium nitrate, urea, anhydrous ethanol and deionized water, adjusting the pH value to 3, and preparing TiO2 / diatomite powder through a sol-gel technology; taking and mixing the acid-leached diatomite and deionized water, adding an organic binder and a fluxing agent, and preparing wet mud spheres in a pelletizer; and putting the wet mud spheres and the TiO2 / diatomite powder into a high-speed rotating steel barrel together, performing high-speed rotation, drying the obtained product, and calcining the dried product in a muffle furnace to obtain the Ce / N co-doped TiO2 / acid-leached diatomite composite spheres CNTD-G. The prepared CNTD-G is simple to operate when used for degrading organic dyes and polycyclic substances, does not introduce secondary pollution, and is convenient torecover.

Description

technical field [0001] The invention relates to the field of photocatalyst and its application, in particular to Ce / N co-doped TiO 2 Preparation of acid-leached diatomite composite spheres and its application in the effective use of visible light to degrade organic dyes and polycyclic substances. Background technique [0002] With the in-depth research and development and mass production of polycyclic compounds in the field of medicine, especially antibiotics, tetracycline antibiotics, one of the broad-spectrum antibiotics, are widely used in agricultural production projects such as planting and animal husbandry. One of them is the increasing amount of antibiotics remaining in the natural environment. At the same time, the production of antibiotics will be accompanied by a large amount of waste water, which often contains antibiotic components. If it is directly discharged into the natural environment without treatment, it will cause serious pollution to the environment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30B01J35/08C02F101/38C02F101/30
CPCB01J27/24C02F1/30C02F2101/38C02F2305/10C02F2101/308C02F2101/30B01J35/51
Inventor 陈岩王春平吴琼张朝红宋有涛
Owner LIAONING UNIVERSITY
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