Preparation method of interstitial boron doping titanium dioxide photocatalytic material and application

A photocatalytic material, titanium dioxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, nanotechnology for materials and surface science, etc., can solve problems such as complex methods and poor material reusability, and achieve catalytic The effect of high efficiency, simple and feasible method, high-efficiency enrichment and fast oxidation kinetics

Inactive Publication Date: 2018-08-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the TiO 2 The modification of organic phenylboronic acid functional groups on the catalyst surface is not only complicated, but also the organic matter on the surface is easily oxidized and decomposed during the photocatalytic process, resulting in poor reusability of the material

Method used

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  • Preparation method of interstitial boron doping titanium dioxide photocatalytic material and application
  • Preparation method of interstitial boron doping titanium dioxide photocatalytic material and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An interstitial boron-doped TiO for efficient enrichment and rapid oxidative degradation of phenols with different structures 2 The specific preparation steps of nanomaterials are as follows:

[0027] (1) Weigh 2.0 g of boric acid, 10 g of absolute ethanol and 0.1 g of acetic acid, pour the three into a 50 ml beaker, stir and mix evenly, and mark it as solution 1. Then the solution 1 was put into a mixture of ice and water at 0°C and cooled. After the temperature of solution 1 drops to 0° C., measure 20 g of tetrabutyl titanate and slowly add it to solution 1 dropwise, marking this mixed solution as solution 2.

[0028] (2) Put the solution 2 into a constant temperature oven at 30-50°C for sol-gel and aging process, and the aging time is 12-24h. After completing the sol-gel and aging, take out the white gel solid, wash the white gel solid with absolute ethanol and deionized water successively, and repeat the washing three times.

[0029] (3) Put the cleaned white gel solid i...

Embodiment 2

[0032] Interstitial boron TiO prepared by the method of Example 1 2 And pure TiO 2 Nano particles are used as photocatalytic materials. Deionized water was used to prepare catechol, resorcinol, hydroquinone and phenol solutions with a concentration of 20 mg / L. The four phenols were photocatalyzed and degraded by ultraviolet light irradiation. The dosage of the catalyst is 1g / L. Such as figure 1 As shown, after the photocatalytic degradation time is 4 hours, the interstitial boron doped TiO 2 The degradation kinetic rate constants of catechol, resorcinol, hydroquinone and phenol are 0.05769 min-1, 0.04713 min-1, 0.02864 min-1 and 0.01281 min-1, respectively. Pure TiO 2 The degradation kinetic rate constants of catechol, resorcinol, hydroquinone and phenol are 0.01381min-1, 0.01003min-1, 0.01825min-1 and 0.00658min-1, respectively. This example shows that B -TiO 2 It has a more efficient and rapid photocatalytic oxidation rate for low-concentration phenol in water.

Embodiment 3

[0034] Use the interstitial boron-doped TiO prepared in Example 1 2 And pure TiO 2 Nano particles are used as photocatalytic materials. Configure a 50mg / L solution of catechol, resorcinol, hydroquinone and phenol in a 50ml temperature-controllable photocatalytic reaction cell. Stir it evenly with a magnetic stirrer. Take a little sample and save it for testing. As the initial concentration value of the four phenols. Then add 50mg of interstitial boron doped TiO 2 And pure TiO 2 The nanocrystal is configured as a suspension system with an adsorbent content of 1.0g / L. During the magnetic stirring process, samples are taken at different time intervals to analyze the concentration of residual phenol in the solution. Such as figure 2 As shown, after 2h static adsorption, the interstitial boron doped TiO 2 The maximum equilibrium adsorption concentrations of hydroquinone, resorcinol, hydroquinone and phenol solutions were 18.38 mg / L, 12.53 mg / L, 7.363 mg / L, and 6.670 mg / L, respecti...

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Abstract

The invention relates to a preparation method of an interstitial boron doping titanium dioxide photocatalytic material and application. An interstitial boron doping TiO2 nanometer photocatalyst can beprepared by a low-temperature sol-gel method, wherein the interstitial boron ions have an effect of serving as Lewis acid sites on the catalyst surface, and the adsorption effect on Lewis alkaline phenol is greatly enhanced. Compared with the prior art, the preparation method disclosed by the invention has the advantages that adsorption of phenol in water can be effectively enhanced, the selective adsorption aim can be achieved by virtue of different chemical configuration adsorption effects, and finally the aim of rapidly oxidizing targeted pollutants is achieved by virtue of a photocatalytic oxidation technology. The method is simple, feasible, obvious in enhanced adsorption effect, high in selectivity and high in catalytic efficiency.

Description

Technical field [0001] The present invention relates to the technical field of degradation of environmental phenolic pollutants, in particular to a preparation method of interstitial boron-doped titanium dioxide photocatalytic material, enhanced adsorption of phenols, selective adsorption of phenols of different structures, and photocatalytic application of high-efficiency degradation . Background technique [0002] There are many types of environmental phenolic pollutants, which are widely present in nature. Its properties are stable and not easy to be degraded and removed, and it is easy to be enriched through the food chain in the ecological environment, which affects the health of organisms. The actual pollutants in the water body are complex and diverse, among which 99% are easily degraded and only 1% are difficult to degrade. If the traditional treatment method is used, the easily degradable pollutants must be removed first, and 1% of the refractory pollutants still exist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B82Y20/00B82Y30/00B82Y40/00C02F1/30C02F101/34
CPCB01J21/063B01J35/004B82Y20/00B82Y30/00B82Y40/00C02F1/30C02F2101/345C02F2305/10
Inventor 赵国华谢名利
Owner TONGJI UNIV
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