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Method for removing heavy metal-organic combined pollutants in water by utilizing TiO2/FeO composite photocatalyst

A catalyst and composite light technology, applied in water pollutants, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of high recombination rate, and achieve the effect of improving reaction activity, reducing agglomeration and simple operation.

Inactive Publication Date: 2017-01-11
SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to overcome existing TiO 2 Photocatalytic technology has the defect of high hole-electron pair recombination rate and the severe situation of the current heavy metal-organic compound pollution environment treatment, and provides a method using TiO 2 / Fe 0 Method for efficient and simultaneous removal of heavy metal-organic composite pollutants in water by composite photocatalyst

Method used

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  • Method for removing heavy metal-organic combined pollutants in water by utilizing TiO2/FeO composite photocatalyst
  • Method for removing heavy metal-organic combined pollutants in water by utilizing TiO2/FeO composite photocatalyst
  • Method for removing heavy metal-organic combined pollutants in water by utilizing TiO2/FeO composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: TiO 2 / Fe 0 Preparation of Composite Photocatalyst

[0028] In a 100mL three-neck flask, add 25mL of the mixed solution (V 乙醇 :V 水 =4:1), weigh 0.05g FeSO 4 ·7H2 O was added to the mixture and stirred until completely dissolved. Next, weigh 1g TiO 2 Add it to a three-necked flask, and stir for 10 minutes under nitrogen protection to ensure complete and uniform mixing. Subsequently, the excess NaBH was added dropwise to 4 The solution was added to the mixed solution in the three-necked flask, and continued to stir for 20 minutes. After the reaction was completed, the black solid was separated by vacuum filtration, then washed with ethanol, placed in a vacuum drying oven, and dried at 75°C, and then stored in a container filled with A brown bottle of nitrogen, from which TiO 2 / Fe 0 composite photocatalyst. Alone Fe 0 The preparation method, except not adding TiO 2 Besides, other conditions are the same as TiO 2 / Fe 0 The preparation conditions of...

Embodiment 2

[0030] Addition of TiO to water containing Cr(VI) and ciprofloxacin under UV light irradiation 2 / Fe 0 Composite photocatalyst for simultaneous removal of Cr(VI) and ciprofloxacin. The specific steps are: use a 100mL quartz tube as a reaction bottle, treat 50mL of water with a concentration of 20mg / L Cr(VI) and 30mg / L ciprofloxacin, and adjust the pH of the water to 3.0. Add respectively the TiO prepared in embodiment 1 to each reaction bottle 2 / Fe 0 Composite photocatalyst, Fe 0 and TiO 2 , so that the final concentration is 1.00g / L, and the reaction bottle is placed on the photocatalytic reactor, the stirrer speed is 120rpm, the ultraviolet light irradiation reaction time is 60min, the power of the ultraviolet light is 10W, and its main incident The wavelength is 254nm. Specific results such as figure 1 shown.

Embodiment 3

[0035] A 100mL quartz tube was used as a reaction bottle, and 50mL of water containing 20mg / L Cr(VI) and 30mg / L ciprofloxacin were simultaneously removed, and the pH of the water was adjusted to 3.0, 6.0, and 9.0, respectively. Add the TiO prepared in Example 1 to reaction flasks containing water bodies of various pH values ​​respectively 2 / Fe 0 Composite photocatalyst so that its final concentration is 1.00g / L. And the reaction bottle was placed on the photocatalytic reactor, the rotation speed of the stirrer was 120rpm, the reaction time of ultraviolet light irradiation was 60min, the power of the ultraviolet light was 10W, and its main incident wavelength was 254nm. The concentration changes of Cr(VI) and ciprofloxacin in the water before and after the reaction were measured. The results are shown in Table 1. It can be seen from Table 1 that in this catalytic system, the simultaneous removal of Cr(VI) and ciprofloxacin is significantly dependent on pH conditions. In the...

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Abstract

The invention discloses a method for removing heavy metal-organic combined pollutants in water by utilizing a TiO2 / FeO composite photocatalyst. According to the invention, TiO2 is combined with FeO to prepare the TiO2 / FeO composite photocatalyst with high activity, and heavy metal Cr(VI) and antibiotics ciprofloxacin are synchronously removed under ultraviolet light and aerobic conditions. The existence of FeO effectively inhibits the compounding of TiO2 holes and electron pairs, and the existence of TiO2 can effectively relieve agglomeration of FeO, thus promoting the catalytic performance on the whole, and finally realizing efficient and synchronous removal of heavy metal-organic combined pollutants in water.

Description

technical field [0001] The invention belongs to the field of heavy metal-organic composite pollution treatment, in particular to a TiO 2 / Fe 0 A method for efficient and simultaneous removal of heavy metal-organic composite pollutants in water by composite photocatalysts. Background technique [0002] In the past ten years, photocatalytic technology has attracted more and more attention at home and abroad in the field of environmental pollutant treatment. TiO has the characteristics of high catalytic activity, strong chemical stability and non-toxic to human body. 2 It is considered to be the most promising photocatalyst. Numerous studies have shown that TiO 2 The photogenerated holes generated in the photocatalytic process react with water to generate strong oxidizing hydroxyl radicals and photogenerated electrons, which can effectively remove organic matter and heavy metals in polluted water. Among them, organic matter is oxidized and degraded by hydroxyl radicals, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32B01J23/745C02F101/36C02F101/38C02F101/34
CPCC02F1/32B01J23/745C02F2101/36C02F2101/34C02F2101/38C02F2305/10B01J35/39
Inventor 刁增辉徐向荣左林子刘锦军胡咏霞
Owner SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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