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Adsorption photocatalytic hydrogel material and application thereof in synergistic photocatalytic sewage hydrogen generation capable of reversing heavy metal pollution

A photocatalytic and hydrogel technology, applied in the direction of adsorption of water/sewage treatment, alkali metal oxides/hydroxides, alkali metal compounds, etc., can solve the problems of quenching photogenerated electrons and affecting the hydrogen production performance of photocatalysts, etc. Achieve the effects of reversing the poisonous effect, good light transmission, and realizing recycling

Inactive Publication Date: 2017-11-17
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the presence of various heavy metal ion pollutants in common industrial wastewater, which can quench photogenerated electrons, seriously affect the hydrogen production performance of photocatalysts.

Method used

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  • Adsorption photocatalytic hydrogel material and application thereof in synergistic photocatalytic sewage hydrogen generation capable of reversing heavy metal pollution
  • Adsorption photocatalytic hydrogel material and application thereof in synergistic photocatalytic sewage hydrogen generation capable of reversing heavy metal pollution
  • Adsorption photocatalytic hydrogel material and application thereof in synergistic photocatalytic sewage hydrogen generation capable of reversing heavy metal pollution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 20mg of photocatalytic nanomaterial TiO prepared by sol-hydrothermal method 2 Disperse in 10ml of deionized water and ultrasonicate for 1 hour to prepare a uniform mixed solution. 150 mg of agarose (G-10, EEO 0.1) was added to the mixed solution after ultrasonic dispersion, heated to 90° C., and kept for 5 minutes. Pour the mixed solution into a watch glass with a diameter of 10 cm, quickly cool it to room temperature, and take it out after solidification to obtain the designed adsorption photocatalytic hydrogel material (TiO 2 @Agar).

[0055] After that, the TiO 2 @Agar hydrogel immersed in the metal ion solution, after 6 hours of light, the TiO adsorbed with heavy metal ions 2 @Agar Take it out, immerse it in 50ml of sodium sulfide solution (0.5mg / ml), stir, so that the adsorbed heavy metal ions fully react with the sulfur ions in the solution, and transform into corresponding metal sulfide semiconductors. After half an hour, take out the TiO after vulcanization ...

Embodiment 2

[0057] 10 mg of photocatalytic nanomaterial carbon nitride (C 3 N 4 ) was dispersed in 10ml of deionized water and ultrasonicated for 1 hour to prepare a uniform mixed solution. Add 100 mg of agarose (G-10, EEO 0.1) to the mixed solution after ultrasonic dispersion, heat to 90° C., and keep warm for 2 minutes. Pour the mixed solution into a watch glass with a diameter of 10 cm, quickly cool it to room temperature, take it out after solidification, and obtain another adsorption photocatalytic hydrogel material (denoted as C 3 N 4 @Agar).

[0058] After that, put C 3 N 4 @Agar hydrogel immersed in the metal ion solution, after 6 hours of light, the C adsorbed with heavy metal ions 3 N 4 @Agar Take it out, immerse it in 50ml of potassium sulfide solution (0.5mg / ml), stir, so that the adsorbed heavy metal ions fully react with the sulfur ions in the solution, and transform into corresponding metal sulfide semiconductors. After 10 minutes, remove the vulcanized C 3 N 4 @Aga...

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Abstract

The invention relates to an adsorption photocatalytic hydrogel material and an application thereof in synergistic photocatalytic sewage hydrogen generation capable of reversing heavy metal pollution. The adsorption photocatalytic hydrogel material comprises a photocatalytic nano material and a porous transparent matrix for loading the photocatalytic nano material. The porous transparent matrix is prepared from a polysaccharide polymer material, which carry out crosslinking easily to form hydrogel. The polysaccharide hydrogel is rich in functional groups such as -OH, -NH3, and the like, can absorb heavy metal ions, and reduces the concentration of heavy metal ions in sewage.

Description

technical field [0001] The invention relates to a novel strategy of recycling heavy metal pollutants to solve their poisoning to photocatalysts. Using the prepared adsorbed photocatalytic hydrogel material and subsequent in-situ vulcanization treatment technology, the recovery and reuse of heavy metal pollutants is realized, and the adsorbed heavy metal ions are converted into corresponding photocatalytic sensitization materials. This strategy reverses the adverse effects of heavy metal ions on the photocatalytic process, improves the photocatalytic hydrogen production efficiency in heavy metal sewage, and realizes sewage purification, which belongs to the field of energy environment catalytic materials and nanomaterial technology. Background technique [0002] Due to the rapid development of industry, a large amount of wastewater containing various metal ions has serious potential harm to the environment. At the same time, the massive consumption of petroleum resources forc...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J31/38B01J31/06C02F1/28C02F1/62B01J20/24B01J20/28B01J20/30C01B3/04C02F101/20C02F101/22
CPCB01J20/06B01J20/24C01B3/042C02F1/281C02F1/286B01J20/28047B01J31/06B01J31/26B01J31/38B01J37/20C01B2203/1082C02F2101/20C02F2101/22B01J2220/46B01J35/39Y02W10/37Y02E60/36
Inventor 徐颖峰魏晨阳张辰施剑林张玲霞
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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