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Nanometer silver-doped titanium dioxide/chitosan composite microspheres for photolyzing phenol in source water

A nano-titanium dioxide, titanium dioxide technology, applied in organic compound/hydride/coordination complex catalysts, water/sewage treatment, chemical/physical processes, etc., can solve the problems of phenol pollution, difficult recovery and reuse, and easy aggregation. , to achieve the effect of reducing phenol

Inactive Publication Date: 2012-07-18
CHONGQING UNIV OF ARTS & SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is: to deal with the deficiency of phenol pollution in the source water of above-mentioned prior art, this research intends to ensure that nano TiO 2 In the case of the advantages of composite microspheres with chitosan, to overcome the disadvantages of powdery materials such as easy aggregation, easy inactivation, and difficulty in recycling and reuse, it is proposed to make composite microspheres and use them to treat phenol in water source water to improve the treatment efficiency. Efficiency, enhanced separation and recovery effect

Method used

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  • Nanometer silver-doped titanium dioxide/chitosan composite microspheres for photolyzing phenol in source water
  • Nanometer silver-doped titanium dioxide/chitosan composite microspheres for photolyzing phenol in source water
  • Nanometer silver-doped titanium dioxide/chitosan composite microspheres for photolyzing phenol in source water

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Embodiment 1

[0023] One, the preparation of phenol purifying agent in a kind of source water, make according to the following steps:

[0024] 1. Titanium dioxide doped with silver

[0025] In 6g of Ti(SO 4 ) 2 After adding 100mL of distilled water to the solid to form a solution, slowly add 100:3 (ratio of substance amount) of AgNO 3 Solid, 0.15mol L formed under magnetic stirring -1 Ti(SO 4 ) 2 Solution, put the solution into a clean autoclave of 100mL stainless steel (the inner cup is polytetrafluoroethylene) after standing for a while, the maximum volume of the solution shall not exceed 75% of the volume of the autoclave, and the oven shall heat up from the ambient temperature to 200°C Reaction 4h, after the completion of the reaction, cut off the power supply to allow the oven to cool down naturally, take out the glass substrate after cooling to room temperature, and wash it with deionized water (with BaCl 2 Solution test SO 4 2- existence), washed with absolute ethanol, dried...

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Abstract

The invention relates to nanometer silver-doped titanium dioxide / chitosan composite microspheres, which is source water cleaning agent. The source water cleaning agent is the composite microspheres prepared by using nanometer silver-doped titanium dioxide as a catalyst and using chitosan as a carrier and is used for treating phenol in source water, wherein the nanometer titanium dioxide is doped with silver, then is mixed with the chitosan, is embedded by polyvinyl alcohol and sodium alginate and is prepared into the nanometer silver-doped titanium dioxide / chitosan microspheres. According to the cleaning agent, the phenol in the source water is effectively reduced, and the removal rate of the phenol in the source water can reach 95.3 percent.

Description

technical field [0001] The invention relates to the field of water source water treatment, in particular to the application field of using nano-doped silver titanium dioxide / chitosan composite microspheres to treat phenol in water source water. Background technique [0002] Phenol is a widely used chemical raw material. The pollution of phenolic wastewater is very serious, which has seriously affected the safety of drinking water. The treatment of phenolic wastewater is imminent. There are many treatment methods at home and abroad, such as biological method, extraction method, adsorption method, etc., but these methods have poor treatment effects and high investment costs, which are difficult for enterprises to bear, and sometimes improper treatment will cause secondary pollution. Therefore, it is imminent to study the phenol wastewater treatment method with wide application value. Titanium dioxide (TiO 2 ) is an ideal photocatalyst with the characteristics of non-toxicity...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/58B01J31/38C02F101/34
Inventor 夏红霞朱启红
Owner CHONGQING UNIV OF ARTS & SCI
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