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Metal-doped titanium dioxide photocatalytic degradation material for treating printing and dyeing wastewater and preparation method of metal-doped titanium dioxide photocatalytic degradation material

A metal-doped, titanium dioxide technology, applied in the field of photocatalytic degradation of colored pollution, can solve the problems of the need to improve the photodegradation rate and efficiency, the poor photodegradation effect of dye wastewater, and the limited photocatalytic ability, and achieve excellent photocatalytic ability, Improve photocatalytic ability, improve the effect of photocatalytic ability

Pending Publication Date: 2020-09-29
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this patent, only ordinary titanium dioxide plays the role of photocatalytic degradation, and its photocatalytic ability is limited, resulting in poor photodegradation effect on dye wastewater, and its photodegradation rate and efficiency still need to be improved
In addition, this preparation method uses viscous substances to directly adhere titanium dioxide to the surface of the rush fiber, which may cause secondary pollution due to the shedding of titanium dioxide in practical applications.

Method used

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  • Metal-doped titanium dioxide photocatalytic degradation material for treating printing and dyeing wastewater and preparation method of metal-doped titanium dioxide photocatalytic degradation material
  • Metal-doped titanium dioxide photocatalytic degradation material for treating printing and dyeing wastewater and preparation method of metal-doped titanium dioxide photocatalytic degradation material
  • Metal-doped titanium dioxide photocatalytic degradation material for treating printing and dyeing wastewater and preparation method of metal-doped titanium dioxide photocatalytic degradation material

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preparation example Construction

[0031] The invention provides a method for preparing a metal-doped titanium dioxide photocatalytic degradation material for treating printing and dyeing wastewater, comprising the following steps:

[0032] S1. Mix the alcoholic organic solvent and water uniformly according to a predetermined volume ratio to obtain a mixed solution; then place the surfactant in the mixed solution and stir to obtain a washing solution;

[0033] S2, placing the rush fiber in the washing solution obtained in step S1, and drying after washing to obtain the washed rush fiber;

[0034] S3. Mix nickel nitrate, zinc nitrate and urea according to a predetermined molar ratio and dissolve them in water to obtain solution A; disperse butyl titanate in ethanol to obtain solution B;

[0035]S4. Slowly add the solution A obtained in step S3 into the solution B, stir rapidly to obtain a mixed dispersion system; place the washed rush fiber obtained in step S2 in the mixed dispersion system, and After fully rea...

Embodiment 1

[0047] This embodiment provides a method for preparing a metal-doped titanium dioxide photocatalytic degradation material for treating printing and dyeing wastewater, including the following steps:

[0048] S1, with ethanol as alcoholic organic solvent, ethanol and water are mixed uniformly by volume ratio 30%:70%, obtain mixed solution; Then use monolauryl phosphate as surfactant, place monolauryl phosphate in the In the mixed solution, the washing liquid is obtained after stirring evenly, and the concentration of monolauryl phosphate in the washing liquid is 0.3g / L;

[0049] S2, placing the rush fiber in the washing solution obtained in step S1 at a water bath ratio of 1:50, washing at 30°C for 30 minutes, and drying at 60°C for 40 minutes to obtain the washed rush fiber;

[0050] S3, take by weighing 1.746g nickel nitrate hexahydrate, 0.891g zinc nitrate hexahydrate and 1.08g urea, make the mol ratio of nickel nitrate, zinc nitrate and urea be 2:1:6, then mix it and dissolv...

Embodiment 2～11

[0060] Embodiments 2 to 11 provide a method for preparing a metal-doped titanium dioxide photocatalytic degradation material for treating printing and dyeing wastewater. Compared with Example 1, the difference is that nickel nitrate, zinc nitrate and urea in step S3 are changed. The molar ratio of butyl titanate, the mass fraction of butyl titanate or the molar ratio of titanate, nickel nitrate and zinc nitrate in the mixed dispersion system in step S4, the mass ratio of rush fiber to the mixed dispersion system, the rest of the steps are unchanged, and will not be described here. Let me repeat. The relevant parameter values ​​in steps S3 and S4 of each embodiment are shown in Table 1.

[0061] Table 1 embodiment 2~11 in the relevant parameter value in step S3 and S4

[0062]

[0063]

[0064] Taking the dye reactive red as an example, the photocatalytic degradation time and photocatalytic degradation efficiency of the metal-doped titanium dioxide photocatalytic degrada...

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Abstract

The invention discloses a metal-doped titanium dioxide photocatalytic degradation material for treating printing and dyeing wastewater and a preparation method of the metal-doped titanium dioxide photocatalytic degradation material. The method comprises the following steps: preparing a washing solution containing an alcohol organic solvent, water and a surfactant to wash juncus effuses fibers, washing juncus effuses, preparing a mixed dispersion system simultaneously containing titanium, nickel and zinc elements, putting the washed juncus effuses into the mixed dispersion system, fully reacting, cleaning, drying and baking, and preparing the metal-doped titanium dioxide photocatalytic degradation material for treating the printing and dyeing wastewater by adopting an in-situ synthesis method. With application of the mode, the photocatalytic degradation material can be effectively adsorbed by utilizing the porous structure of the juncus effuses fiber so that the photocatalytic degradation material can be conveniently recycled and reused; in addition, nickel and zinc can be used for co-doping titanium dioxide so that the photocatalytic capacity of the metal-doped titanium dioxide photocatalytic degradation material is effectively improved, and the metal-doped titanium dioxide photocatalytic degradation material has a higher degradation rate and higher degradation efficiency and can be used for efficiently degrading different types of dyes.

Description

technical field [0001] The invention relates to the technical field of photocatalytic degradation of colored pollution, in particular to a metal-doped titanium dioxide photocatalytic degradation material for treating printing and dyeing wastewater and a preparation method thereof. Background technique [0002] Water pollution in the textile industry has always been a key problem restricting the development of the industry. Among them, the discharge of textile printing and dyeing wastewater accounts for 80% of the total wastewater discharge in the textile industry, which seriously damages the natural ecology. Printing and dyeing wastewater has always been a difficult problem in wastewater treatment due to its characteristics of large discharge volume, complex composition, and high COD value. The traditional printing and dyeing wastewater treatment method includes multiple processes: dyeing wastewater→coagulation sedimentation→air flotation→sand filtration→carbon adsorption→re...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J35/10C02F1/30C02F101/30
CPCB01J31/06C02F1/30C02F2101/308C02F2305/10B01J35/61B01J35/39Y02W10/37
Inventor 周思婕付专张春华王阿明徐卫林
Owner WUHAN TEXTILE UNIV
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