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Method for preparing supported photocatalyst

A photocatalyst and load-type technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of increased contact probability, unfavorable carrier photocatalytic activity, and short service life of catalysts. Opportunity of contact, beneficial to enrichment, effect of good catalytic ability

Inactive Publication Date: 2012-07-25
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above studies confirmed that Fe-TiO 2 It has good photocatalytic performance, but there is a problem of short service time of the catalyst, mainly due to the prolongation of the reaction time, Fe 3+ converted to Fe 2+ The amount of increased, resulting in Fe 2+ The probability of contact with photogenerated holes increases, which is not conducive to TiO 2 / Improvement of the photocatalytic activity of the carrier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Prepare 1 L of aqueous ethanol solution with a molar concentration of 4 mol / L, add 100 g of ferric oxalate under stirring, and mix well to form solution A;

[0027] (2) Prepare 1 L of a mixed solution of n-butyl titanate and ethanol with a molar concentration of 2 mol / L, and add 0.5 g of hydroxypropyl cellulose to form a solution B;

[0028] (3) Add 600g of activated carbon to A solution, after stirring evenly, form solution A1, the solution B in the step (2) with 40cm 3 The speed of / h is added dropwise in the A1 solution;

[0029] (4) The solution obtained in step (3) was dried at a constant temperature at 80° C. for 8 hours;

[0030] (5) Calcining the dried solid at 500° C. for 4 h.

[0031] 11.7% Fe-C-TiO can be obtained by the above steps 2 / AC(TiO 2 The loading amount is 21%) photocatalyst. 3g11.7%Fe-C-TiO 2 / AC was added to a photocatalytic device with a volume of 1 L, stirred by bubbling, and sampled and analyzed after 4 hours of reaction. The COD remo...

Embodiment 2

[0033] (1) Prepare 500 mL of aqueous methanol solution with a molar concentration of 3 mol / L, add 50 g of iron carbonate under stirring, and form solution A after mixing;

[0034] (2) Configure 2L of titanium tetrachloride and methanol solution with a molar concentration of 2.5mol / L, add 6g of methylcellulose to form solution B;

[0035] (3) Add 1000g molecular sieve to A solution, after stirring evenly, form solution A1, the solution B in the step (2) is separated by 500cm 3 The speed of / h is added dropwise in the A1 solution;

[0036] (4) Prepare 500 mL of aqueous methanol solution with a molar concentration of 3 mol / L, add 50 g of iron carbonate under stirring, and form solution A after mixing;

[0037] (5) Configure 2L of titanium tetrachloride and methanol solution with a molar concentration of 2.5mol / L, add 6g of methylcellulose to form solution B;

[0038] (6) Slowly pour solution A in step (4) into the solution obtained in step (3) under stirring;

[0039] (7) the ...

Embodiment 3

[0044] (1) Prepare 500 mL of propanol aqueous solution with a molar concentration of 3.5 mol / L, add 40 g of iron ethylate under stirring, and form solution A after mixing;

[0045] (2) Prepare 1 L of n-butyl titanate and propanol solution with a molar concentration of 1.5 mol / L, and add 15 g of propyl cellulose to form solution B;

[0046] (3) Add 800g zeolite to A solution, after stirring evenly, form solution A1, the solution B in the step (2) is separated by 800cm 3 The speed of / h is added dropwise in the A1 solution;

[0047] (4) Prepare 500 mL of propanol aqueous solution with a molar concentration of 3.5 mol / L, add 40 g of iron ethylate under stirring, and form solution A after mixing;

[0048] (5) Prepare 1 L of n-butyl titanate and propanol solution with a molar concentration of 1.5 mol / L, and add 15 g of propyl cellulose to form solution B;

[0049] (6) Slowly pour solution A in step (4) into the solution obtained in step (3) under stirring;

[0050] (7) the solut...

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Abstract

The invention discloses a method for preparing supported photocatalyst. The valence state of metal in titanium dioxide crystal lattices is controlled through dosing metal ions and introducing a nonmetallic element C. The service life of the photocatalyst is greatly prolonged. According to aromatic carboxylic acid wastewater degradability experiments, the degradation capacity of the catalyst modified by ions to acidic organic matters with benzene rings in aromatic carboxylic acid wastewater is superior to the degradation capacity of the unmodified catalyst. The invention has the advantages that the COD removal rate reaches more than 80 percent and the PT acid removal rate reaches more than 85 percent.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering, and in particular relates to a preparation of loaded photocatalyst (Fe-C-TiO 2 / carrier) method and its application in photocatalytic degradation of aromatic carboxylic acid wastewater. Background technique [0002] As a new type of inorganic functional material, nano-titanium dioxide has attracted more and more interest, especially for its excellent photocatalytic properties. At the same time, due to the development of the global industrialization process, the problem of environmental pollution is becoming more and more serious. Environmental protection and sustainable development have become the primary issues that people must consider. As a result, semiconductor photocatalysis has developed rapidly in the application of environmental protection and health. In recent years, a large number of research reports at home and abroad have shown that the photocatalytic oxidation method h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/00B01J23/745C02F1/30C02F101/34
Inventor 管国锋万辉陈越峰杨操
Owner NANJING TECH UNIV