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Visible light catalysts used for treatment of methylene blue dye waste water and a preparing method thereof

A methylene blue dye and visible light technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low solar energy utilization, and achieve easy industrial production, The effect of simple process and simple preparation method

Inactive Publication Date: 2015-07-22
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However TiO 2 The band gap is wide, and it can only absorb ultraviolet light of λ≤387nm, and the utilization rate of solar energy is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 0.01mol or 1.81g vanadium pentoxide, and then take 0.43g or 0.003mol anhydrous sodium sulfate, and dissolve the two in 10% 40mL hydrogen peroxide under ice-water bath conditions. After completely dissolving, place the mixed solution in Perform a constant temperature reaction on a water bath at 60°C, filter the reddish-brown precipitate formed by the reaction, and then dry it at room temperature, then place the dried precipitate in a crucible and transfer it to a muffle furnace for calcination at 300°C for 3 hours, and take it out after cooling .

[0025] Add 40 mL of methylene blue dye wastewater with a concentration of 70.0 mg / L into a cylindrical quartz photocatalytic reactor, add 40 mg of the catalyst prepared by the above method, stir the photocatalyst with magnetic force to keep the photocatalyst in a suspended state, and then irradiate it with a 300 W xenon lamp (The built-in filter filters out the wavelength spectrum below 420 nm). The degradation rate of ...

Embodiment 2

[0027] Weigh 0.01mol or 1.81g vanadium pentoxide, 0.002mol or 0.483g copper nitrate trihydrate, and dissolve them in 40mL hydrogen peroxide with a content of 10% under ice-water bath conditions. After completely dissolving, place the mixed solution in Perform a constant temperature reaction on a water bath at 60°C, filter the reddish-brown precipitate formed by the reaction, and then dry it at room temperature, then place the dried precipitate in a crucible and transfer it to a muffle furnace for calcination at 200°C for 3 hours, and take it out after cooling .

[0028] Add 40 mL of methylene blue dye wastewater with a concentration of 70.0 mg / L into a cylindrical quartz photocatalytic reactor, add 40 mg of the catalyst prepared by the above method, stir the photocatalyst with magnetic force to keep the photocatalyst in a suspended state, and then irradiate it with a 300 W xenon lamp (The built-in filter filters out the wavelength spectrum below 420 nm). The degradation rate ...

Embodiment 3

[0030] Weigh 0.01mol or 1.81g vanadium pentoxide, 0.003mol or 0.725g copper nitrate trihydrate, and dissolve them in 10% 40mL hydrogen peroxide under ice-water bath conditions. After completely dissolving, place the mixed solution in a water bath A constant temperature reaction was carried out at 60°C, and the reddish-brown precipitate generated by the reaction was filtered and dried at room temperature, and then the dried precipitate was placed in a crucible and transferred to a muffle furnace for calcination at 300°C for 3 hours, cooled and taken out for use.

[0031] Add 40 mL of methylene blue dye wastewater with a concentration of 70.0 mg / L into a cylindrical quartz photocatalytic reactor, add 40 mg of the catalyst prepared by the above method, stir the photocatalyst with magnetic force to keep the photocatalyst in a suspended state, and then irradiate it with a 300 W xenon lamp (The built-in filter filters out the wavelength spectrum below 420 nm). The degradation rate o...

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PUM

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Abstract

Visible light catalysts used for treatment of methylene blue dye waste water and a preparing method thereof are disclosed. The method adopts a soluble metal salt, vanadium pentoxide and hydrogen peroxide as raw materials and includes stirring and dissolving at 0-10 DEG C, heating to 50-62 DEG C, maintaining the temperature, reacting until no bubble is generated and a precipitate is generated at the bottom, filtering, drying to obtain the precipitate, and calcinating to obtain catalyst powder having a general formula of Mex.V2O5, wherein the soluble metal salt is a soluble sodium salt or a copper salt, the Me is sodium or copper, and the x is 0.2-0.4. The prepared catalysts can effectively degrade methylene blue dye in waste water under irradiation of visible light.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic functional materials, and relates to a visible light catalyst for treating methylene blue dye wastewater and a preparation method thereof. Background technique [0002] At present, organic dye wastewater has become one of the main sources of water pollution. The wastewater has the characteristics of large water volume, high concentration, complex composition, deep color and refractory degradation. Most dyes are toxic, carcinogenic, teratogenic and mutagenic. Methylene blue is an important organic chemical synthetic cationic dye with a wide range of industrial applications. For example, it can be applied to the dyeing of hemp, silk fabrics, paper, bamboo and wood, the dyeing of biological and bacterial tissues, and the manufacture of ink and color lakes. The wide application of methylene blue in industry has resulted in the serious pollution of wastewater containing methylene ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847B01J23/22C02F1/30C02F101/38
CPCY02W10/37
Inventor 周国华陈绵锋
Owner HUBEI UNIV OF TECH
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