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Preparation method and application of cage-shaped titanium dioxide sensitized by copper carboxyl phenyl porphyrin

A technology of carboxyphenyl porphyrin and phenyl porphyrin, which is applied in the field of preparation of caged titanium dioxide, can solve the problems of harsh conditions, endanger human health and environmental safety, drug resistance of harmful bacteria and the like, and achieve mild synthesis conditions. Simple and effective for improving application prospects

Active Publication Date: 2022-08-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]Tetracycline (TC) is an antibiotic drug widely used in modern medical treatment. It is often used in large quantities in aquaculture and animal husbandry production, but tetracycline is not limited The use often leads to the emergence of drug resistance of harmful bacteria in water and soil, thereby endangering human health and environmental safety (Zhang Q, Ying G, Pan C, et al.Environmentalscience&technology, 2015, 49(11))
However, titanium dioxide still has many disadvantages as a photocatalyst, the most prominent ones are: 1. The band gap is large, and the band gap value is 3.2eV, which only responds to ultraviolet light, while sunlight only contains about 5% of ultraviolet light, most of which are visible light
2. Titanium dioxide nanoparticles are easy to aggregate, resulting in a reduction in surface area and active sites
3. Titanium dioxide synthesis atmosphere often requires heat treatment in reducing atmosphere, and the conditions are relatively harsh

Method used

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  • Preparation method and application of cage-shaped titanium dioxide sensitized by copper carboxyl phenyl porphyrin
  • Preparation method and application of cage-shaped titanium dioxide sensitized by copper carboxyl phenyl porphyrin
  • Preparation method and application of cage-shaped titanium dioxide sensitized by copper carboxyl phenyl porphyrin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1: TiO 2-x(1) Preparation

[0031] Tetraisopropyl titanate (0.6 mmol) and 2-aminoterephthalic acid (1.2 mmol) were dispersed in a mixed solvent of anhydrous DMF (5 mL) and anhydrous methanol (5 mL). After stirring at room temperature for 10 min, the solution was transferred to a Teflon-lined autoclave and heated at 150 °C for 15 h in a constant temperature blast drying oven. The yellow powder was collected by centrifugation, and the collected powder was washed twice with DMF to remove residual organic ligands, washed twice with anhydrous methanol to remove DMF, and dried under vacuum at 100 °C for 12 h to obtain NH 2 -MIL-125(1), by figure 1 The known diffraction peaks are consistent with the simulated diffraction peaks, and the crystal form is good.

[0032] will NH 2 - MIL-125(1) (10 mg) was sonicated into a vial containing absolute ethanol (5 mL). L-Alanine (47.5 mg) was introduced into the above mixture, then the vial was placed in an autoclave with a Tefl...

Embodiment 2

[0049] Step 1: Cage TiO 2-x (2) Preparation

[0050] Tetraisopropyl titanate (0.6 mmol) and 2-aminoterephthalic acid (1.08 mmol) were dispersed in a mixed solvent of anhydrous DMF (5 mL) and anhydrous methanol (4 mL). After stirring at room temperature for 5 min, the solution was transferred to a Teflon-lined autoclave and heated at 140 °C for 13 h in a constant temperature blast drying oven. The yellow powder was collected by centrifugation, and the collected powder was washed once with DMF to remove residual organic ligands, washed once with anhydrous methanol to remove DMF, and dried under vacuum at 90 °C for 10 h to obtain NH 2 -MIL-125(2).

[0051] will NH 2 - MIL-125(2) (10 mg) was sonicated into a vial containing absolute ethanol (5.6 mL). L-Alanine (45 mgl) was introduced into the above mixture, then the vial was placed in an autoclave with a Teflon liner and heated at 170°C for 22h. The gray-colored precipitate was collected by centrifugation, washed twice with a...

Embodiment 3

[0061] Step 1: Cage TiO 2-x (3) Preparation

[0062] Tetraisopropyl titanate (0.6 mmol) and 2-aminoterephthalic acid (1.32 mmol) were dispersed in a mixed solvent of anhydrous DMF (5 mL) and anhydrous methanol (6 mL). After stirring at room temperature for 15 min, the solution was transferred to a Teflon-lined autoclave and heated at 160 °C for 17 h in a constant temperature blast drying oven. The yellow powder was collected by centrifugation, and the collected powder was washed three times with DMF to remove residual organic ligands, washed three times with anhydrous methanol to remove DMF, and dried under vacuum at 110 °C for 14 h to obtain NH 2 -MIL-125(3).

[0063] will NH 2 - MIL-125(3) (10 mg) was sonicated into a vial containing absolute ethanol (4.5 mL). L-Alanine (50 mg) was introduced into the above mixture, then the vial was placed in a Teflon-lined autoclave and heated at 182 °C for 26 h. The gray-colored precipitate was collected by centrifugation, washed 4 t...

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Abstract

The invention relates to the technical field of cage-shaped titanium dioxide materials, in particular to a preparation method and application of cage-shaped titanium dioxide sensitized by copper carboxyl phenyl porphyrin. The preparation method comprises the following steps: synthesizing a titanium dioxide cage by taking NH2-MIL-125 as a template, and then synthesizing a copper carboxyl porphyrin sensitized titanium dioxide cage by stirring and self-assembling copper tetracarboxyl phenyl porphyrin and the titanium dioxide cage. The material keeps the original anatase crystal form and morphology of a titanium dioxide cage, overcomes the defect that a titanium dioxide material only responds in an ultraviolet light region, also has good response to a visible light region, and improves the efficiency of photon-generated carriers. The prepared material is applied to photocatalytic degradation of a tetracycline aqueous solution, the tetracycline degradation rate under visible light reaches 79%, compared with a pure titanium dioxide cage, the tetracycline degradation rate is improved by 43%, the catalytic stability is good, and the crystal form morphology is basically kept unchanged. The invention provides a novel material for photocatalytic degradation of organic pollutants in water.

Description

technical field [0001] The invention relates to the technical field of caged titanium dioxide materials, in particular to a preparation method and application of caged titanium dioxide sensitized by copper carboxyphenyl porphyrin. Background technique [0002] Tetracycline (TC) is an antibiotic drug widely used in modern medicine. It is often used in aquaculture and animal husbandry. However, the unrestricted use of tetracycline often leads to the emergence of drug resistance of harmful bacteria in water and soil. , and then endanger human health and environmental safety (Zhang Q, Ying G, Pan C, et al. Environmental science & technology, 2015, 49(11)). Photocatalytic degradation technology is a technology that directly utilizes sunlight to catalyze the oxidation of pollutants. It is stable and easy to implement, and the degradation products are mostly water and CO. 2 It is an ideal method for degrading organic pollutants in water. Titanium dioxide material is an important ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/18B01J21/06C02F1/30C02F101/38C02F101/34
CPCB01J31/183B01J21/063C02F1/30B01J2531/16B01J2531/025C02F2305/10C02F2101/38C02F2101/34B01J35/39Y02E10/542Y02W10/37
Inventor 陈立勇张慧王瑶
Owner DALIAN UNIV OF TECH
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