MgZnCr-TiO2 hydrotalcite visible-light-induced photocatalyst as well as preparation method and application thereof

A hydrotalcite, visible light technology, used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the harsh synthesis conditions of hydrotalcite, cannot completely remove pollutants, problems such as low utilization of visible light, to achieve the effect of facilitating large-scale production, the preparation process is green and environmentally friendly, and no special equipment is required

Active Publication Date: 2016-07-13
HUNAN UNIV
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the synthesized hydrotalcites are mainly used as adsorbents, and adsorption is only a physical treatment method, which cannot completely remove pollutants; although a small amount of hydrotalcites are used as catalysts, their catalysis occurs under ultraviolet light con

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • MgZnCr-TiO2 hydrotalcite visible-light-induced photocatalyst as well as preparation method and application thereof
  • MgZnCr-TiO2 hydrotalcite visible-light-induced photocatalyst as well as preparation method and application thereof
  • MgZnCr-TiO2 hydrotalcite visible-light-induced photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0049] Example 1:

[0050] A MgZnCr-TiO of the present invention 2 Hydrotalcite-like visible light catalyst, the MgZnCr-TiO 2 The hydrotalcite-like visible light catalyst includes carbonate-type magnesium-zinc-chromium hydrotalcite and titanium dioxide, and the titanium dioxide is supported on the carbonate-type magnesium-zinc-chromium hydrotalcite. The MgZnCr-TiO 2 The hydrotalcite-like visible light catalyst has a lamellar structure. The MgZnCr-TiO 2 The hydrotalcite-like visible light catalyst is mainly composed of MgCl 2 , ZnCl 2 , CrCl 3 Mixed metal salt solution A, NaOH, Na 2 CO 3 Mixed alkali solution B and nano-TiO 2 The aqueous suspension is prepared by the co-precipitation method.

[0051] One of the above-mentioned MgZnCr-TiO embodiments of the present invention 2 The preparation method of hydrotalcite-like visible light catalyst, the preparation device such as figure 1 As shown, including the following steps:

[0052] (1) Take 1.0165gMgCl 2 ·6H 2 O, 0.6815gZnCl 2 , 2.664...

Example Embodiment

[0063] Example 2:

[0064] A MgZnCr-TiO of the present invention 2 The application of hydrotalcite-like visible light catalyst in the photocatalytic degradation of dye wastewater includes the following steps:

[0065] (1) Take 0.05g of MgZnCr-TiO in Example 1 2 The hydrotalcite-like visible light catalyst was added to 100 mL of Congo red solution with an initial concentration of 100 mg / L, placed in the dark and stirred at 800 rpm for 0.5 h to make MgZnCr-TiO 2 The hydrotalcite-like visible light catalyst reaches the adsorption equilibrium to obtain a mixed liquid.

[0066] (2) Under normal temperature and pressure, place the mixed solution in step (1) under the irradiation of a xenon lamp light source (a 300W xenon lamp with filter to simulate a visible light source) for photocatalytic degradation for 180 minutes to complete the Congo Red solution degradation.

[0067] The degradation principle of Congo Red is as follows: Under dark conditions, Congo Red fuel is adsorbed on MgZnCr-TiO...

Example Embodiment

[0077] Example 3:

[0078] A MgZnCr-TiO of the present invention 2 The preparation method of the hydrotalcite-like visible light catalyst is basically the same as that of Example 1, except that the molar ratio of Mg:Zn:Cr=1:2:1 in the mixed metal salt solution A in this example. The MgZnCr-TiO prepared in this example 2 The hydrotalcite-like visible light catalyst is used to treat the Congo red solution, and the application method is the same as in Example 2. Picture 10 It is the graph of the removal effect of Congo red solution over time. From Picture 10 It can be seen that the removal rate of Congo red is 44.4% when the photocatalytic degradation is 30min, and the removal rate of Congo red has reached 59.8% when the degradation is 90min, which shows that the MgZnCr-TiO of the present invention 2 The hydrotalcite-like visible light catalyst can effectively degrade Congo red.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses an MgZnCr-TiO2 hydrotalcite visible-light-induced photocatalyst as well as a preparation method and application thereof. The MgZnCr-TiO2 hydrotalcite visible-light-induced photocatalyst comprises carbonate type magnesium-zinc-chromium hydrotalcite and titanium dioxide which is loaded on the carbonate type magnesium-zinc-chromium hydrotalcite. The preparation method for the MgZnCr-TiO2 hydrotalcite visible-light-induced photocatalyst comprises the following steps: carrying out coprecipitation reaction by taking hydrochlorides of magnesium, zinc and chromium (III) as well as sodium hydroxide, anhydrous sodium carbonate and titanium dioxide as raw materials; and then, carrying out hydrothermal crystallization treatment. The MgZnCr-TiO2 hydrotalcite visible-light-induced photocatalyst disclosed by the invention has the advantages of being great in specific surface area, great in adsorbing capacity, good in absorption of visible light, and the like, can be widely used for photocatalytic degradation of dye wastewater, has very good adsorption capacity and photocatalytic degradation capacity, can completely remove pollutants, and is relatively good in reutilization.

Description

technical field [0001] The invention relates to a visible light catalyst, in particular to a MgZnCr-TiO 2 Hydrotalcite-like visible light catalyst and its preparation method and application. Background technique [0002] With the continuous development of human civilization and science and technology, the human world has stepped into a colorful world from a simple black and white world, all thanks to the emergence of synthetic dyes. However, while synthetic dyes bring colorful colors to the human world, they also cause great damage to the living environment of human beings, especially azo direct dyes. Since the dyeing process does not require a mordant, the dyes are easily lost and enter the water body. ;Because of its acid resistance, alkali resistance and refractory biodegradation, it will stay in nature for a long time; because of its color, it will affect the sunlight through the water layer and affect the photosynthesis of aquatic plants; in addition, some dyes are als...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J23/26C02F1/30
CPCY02W10/37B01J23/26B01J21/063B01J21/10B01J23/06B01J35/004C02F1/30C02F2101/308C02F2305/10
Inventor 张长马驰魏婧婧于志刚李永球
Owner HUNAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap