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Fe and P co-doped strontium titanate/rectorite composite catalyst and application thereof

A composite catalyst, rectorite technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of limited practical application, low quantum efficiency, difficult to recover, etc., and achieve good removal effect. , high catalytic activity, good crystallinity

Inactive Publication Date: 2021-01-26
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Strontium titanate has the characteristics of high band gap, excellent photocatalytic activity, etc., and has unique electromagnetic properties and redox catalytic activity. It has been widely used, but due to its wide band gap, low quantum efficiency, light response only in the ultraviolet range, and poor dispersion in solution degradation, it is difficult to separate and recycle after use, causing secondary Secondary pollution and other issues limit its practical application in industry

Method used

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  • Fe and P co-doped strontium titanate/rectorite composite catalyst and application thereof
  • Fe and P co-doped strontium titanate/rectorite composite catalyst and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A Fe, P co-doped strontium titanate / rectorite composite catalyst, the composite catalyst is formed by using natural clay mineral rectorite as a carrier and Fe, P co-doped strontium titanate, specifically comprising the following steps:

[0026] (1) Dissolve 2.12g of strontium nitrate in 30mL of deionized water and stir, add 5.77g of citric acid as a complexing agent and stir until completely dissolved to obtain a transparent solution A. Dissolve 2.66mL of tetrabutyl titanate in 8.0mL of B Diol to obtain solution B, weigh 0.51g ferric nitrate nonahydrate and 0.18g disodium hydrogen phosphate and dissolve in 5mL ethylene glycol to obtain solution C;

[0027] (2) Under magnetic stirring, slowly add solution C to solution B at a rate of 2-3 drops per second, stir for 10 minutes to obtain solution D, then slowly add solution A to solution D, and continue to stir until a condensation is formed. glue;

[0028] (3) Add pretreated rectorite equivalent to 20% of the gel mass int...

Embodiment 2

[0031] A Fe, P co-doped strontium titanate / rectorite composite catalyst, the composite catalyst is formed by using natural clay mineral rectorite as a carrier and Fe, P co-doped strontium titanate, specifically comprising the following steps:

[0032] (1) Weigh 2.12g of strontium nitrate, dissolve it in 30mL of deionized water and stir, add 6.76g of citric acid as a complexing agent and stir until completely dissolved to obtain a transparent solution A, dissolve 2.66mL of tetrabutyl titanate in 8.0mL of B Diol to obtain solution B, weigh 0.51g ferric nitrate nonahydrate and 0.18g disodium hydrogen phosphate and dissolve in 5mL ethylene glycol to obtain solution C;

[0033] (2) Under magnetic stirring, slowly add solution C to solution B at a rate of 2-3 drops per second, stir for 10 minutes to obtain solution D, then slowly add solution A to solution D, and continue to stir until a gel is formed. glue;

[0034] (3) Add pretreated rectorite equivalent to 30% of the gel mass to...

Embodiment 3

[0037] A Fe, P co-doped strontium titanate / rectorite composite catalyst, the composite catalyst is formed by using natural clay mineral rectorite as a carrier and Fe, P co-doped strontium titanate, specifically comprising the following steps:

[0038] (1) Weigh 2.12g of strontium nitrate, dissolve it in 30mL of deionized water and stir, add 7.73g of citric acid as a complexing agent and stir until completely dissolved to obtain a transparent solution A, dissolve 2.66mL of tetrabutyl titanate in 8.0mL of B Diol to obtain solution B, weigh 0.51g ferric nitrate nonahydrate and 0.18g disodium hydrogen phosphate and dissolve in 5mL ethylene glycol to obtain solution C;

[0039] (2) Under magnetic stirring, slowly add solution C to solution B at a rate of 2-3 drops per second, stir for 10 minutes to obtain solution D, then slowly add solution A to solution D, and continue to stir until a condensation is formed. glue;

[0040] (3) Add pretreated rectorite equivalent to 40% of the ge...

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Abstract

The invention discloses a Fe and P co-doped strontium titanate / rectorite composite catalyst and application thereof. The composite catalyst is formed by compounding natural clay mineral rectorite serving as a carrier with Fe and P co-doped strontium titanate. In organic pollutant treatment, the composite catalyst can effectively degrade organic pollutants in a visible light range under sunlight radiation, and then the organic pollutants are separated from a reacted solution through a magnetic loading effect and are repeatedly used. According to the composite catalyst, semiconductor nanoparticles with small particle sizes, such as doped and modified nano strontium titanate, are inserted into rectorite to form a pillared composite material so as to expand an interlayer domain, the expanded interlayer domain is high in structural stability, growth of the nanoparticles is inhibited, separation of photo-induced electrons and holes is promoted, and meanwhile, the structure can also improve the specific surface area and pore volume of the composite material, enhance the adsorption performance and effectively remove organic pollutants in industrial wastewater.

Description

technical field [0001] The invention relates to the field of environmental protection materials, in particular to an Fe and P co-doped strontium titanate / rectorite composite catalyst and its application. Background technique [0002] Organic pollutants refer to pollutants composed of natural organic substances in the form of carbohydrates, proteins, amino acids, and fats, and some other biodegradable synthetic organic substances. It can be divided into two categories: natural organic pollutants and synthetic organic pollutants. A large number of organic pollutants contained in water bodies have an impact on the ecosystem in the form of toxicity and the reduction of dissolved oxygen in water, endangering human health. [0003] Strontium titanate has the advantages of stable chemical structure, environmental friendliness, and photocatalysis under no bias voltage. It has been widely used in the fields of environmental governance and clean energy development, and is a potential...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C02F1/32C02F101/30C02F101/38
CPCB01J27/1853C02F1/32C02F2305/10C02F2101/30C02F2101/40B01J35/39B01J35/33
Inventor 汪月琴王竟宇练伟王妍刘银
Owner ANHUI UNIV OF SCI & TECH
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