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Visible light degradation agent for dyeing wastewater treatment and preparation method of visible light degradation agent

A printing and dyeing wastewater and visible light technology, which is applied in energy wastewater treatment, textile industry wastewater treatment, light water/sewage treatment, etc., can solve the problems of low quantum efficiency and low effective utilization of solar energy, and achieve reduced bandgap width, excellent The effect of catalytic performance

Inactive Publication Date: 2014-05-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to overcome existing pure TiO 2 In view of the low effective utilization rate of solar energy, low quantum efficiency and shortcomings in preparation technology, a visible light degradation agent for printing and dyeing wastewater treatment with simple preparation process, green environmental protection and high photocatalytic efficiency and its preparation method are provided

Method used

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  • Visible light degradation agent for dyeing wastewater treatment and preparation method of visible light degradation agent
  • Visible light degradation agent for dyeing wastewater treatment and preparation method of visible light degradation agent
  • Visible light degradation agent for dyeing wastewater treatment and preparation method of visible light degradation agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Weigh 0.054g SnCl 2 2H 2 O (the molar ratio of Sn and Ti is 1:100), 8 mL of butyl titanate and 56 mL of isoamyl acetate are poured into the same three-necked flask, and the magnetic stirring is turned on to mix them evenly to form a solution;

[0031] (2) After about 5 minutes, turn on the air pump switch, with 50 L·min -1 The air is sent to the three-necked flask with a small amount of water at a certain rate, and a small amount of water vapor is brought into the three-necked flask with butyl titanate solution through another interface. The mass of water in the gas is 2.5-3.5g· L -1 , continue magnetic stirring, after 15 minutes, the mixed solution turns from colorless and transparent to turbid, and finally turns into a white emulsion, and the reaction stops after 2 hours;

[0032] (3) Distill the three-neck flask containing the white emulsion under reduced pressure to collect isoamyl acetate for reuse in the next preparation; collect the white powder, put it i...

Embodiment 2

[0037] In step (1), weigh 0.027g of SnCl 2 2H 2 O (the molar ratio of Sn and Ti is 0.5:100), 6.5 mL of ethyl titanate and 60 mL of ethyl acetate were poured into the same three-necked flask, and magnetic stirring was turned on to mix them evenly to form a solution. According to the technical scheme of Example 1, calcined at a temperature of 400 ° C to obtain nano-TiO doped with Sn0.5% and Ag0.1% by double metals 2 visible light catalyst. Labeled as Sn0.5-Ag0.1-400.

Embodiment 3

[0039] According to the technical scheme of Example 1, the molar ratio of Ag to Ti is 0.5:100 in step (5), that is, weigh 0.020 g of silver nitrate and dissolve it in 8 mL of absolute ethanol, and mix with the nanoparticles obtained in step (4) in Grind in an agate mortar until dry. Obtain bimetallic doped Sn1%, Ag0.5% nano-TiO calcined at 400 °C 2 visible light catalyst. Labeled as Sn1-Ag0.5-400.

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Abstract

The invention discloses a visible light degradation agent for dyeing wastewater treatment and a preparation method of the visible light degradation agent and belongs to the field of preparation of inorganic nano-composite materials. Hydrolyzable titanium salt is adopted as a main raw material, soluble tin salt and silver salt are adopted as doping agents of tin and silver elements, and eventually Sn and An co-doped TiO2 is obtained through the processes of hydrolysis, grinding, calcination and the like; and the TiO2 has an excellent degradation property for methylene blue under visible light. The nano powder prepared by the invention has the characteristics of small granularity, regular appearance, uniformity in distribution, good dispersivity and the like; and the technology has an industrial popularization value due to high synthesis speed, low cost, high productivity and zero contamination.

Description

technical field [0001] The invention relates to a semiconductor photocatalyst, in particular to a visible light degradation agent for printing and dyeing wastewater treatment and a preparation method thereof, belonging to the technical field of inorganic material preparation. Background technique [0002] Due to its high stability, high efficiency, low cost, clean and non-toxic, and not easy to cause secondary pollution, semiconductor photocatalysts are generally recognized as new green catalysts and have broad application prospects in various environmental purification fields. With the increasing environmental pollution, semiconductor photocatalysts are getting more and more attention. [0003] In the field of photocatalysis, TiO 2 has always been a research hotspot. However, its bandgap width is relatively large (3.2eV), and it can only be excited by ultraviolet light to produce photocatalytic activity. At the same time, the photogenerated electrons and holes recombine ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/66C02F1/30C02F103/30
CPCY02W10/37
Inventor 郑敏王作山周秀峰
Owner SUZHOU UNIV
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