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Titanium tantalate-based photocatalyst doped with niobium and vanadium as well as preparation method and application of titanium tantalate-based photocatalyst

A photocatalyst and tantalic acid technology, applied in the field of vanadium-based titanium tantalate-based photocatalyst, niobium doping, preparation, inorganic photocatalyst and its preparation, can solve the problems of dye sewage, water pollution, etc., to protect the environment, realize the Absorb and improve efficiency

Active Publication Date: 2019-01-08
NANTONG TEXTILE & SILK IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in recent years, the problem of dye sewage has become very prominent and has become a major concern for water pollution.

Method used

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  • Titanium tantalate-based photocatalyst doped with niobium and vanadium as well as preparation method and application of titanium tantalate-based photocatalyst
  • Titanium tantalate-based photocatalyst doped with niobium and vanadium as well as preparation method and application of titanium tantalate-based photocatalyst
  • Titanium tantalate-based photocatalyst doped with niobium and vanadium as well as preparation method and application of titanium tantalate-based photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to the chemical formula TiTa 11.7 Nb 4.5 V 1.8 o 47 The stoichiometric ratio of each element in , respectively weighed 0.2 grams of TiO 2 , 6.486 g Ta 2 o 5 , 1.49 g Nb 2 o 5 , 0.526 g NH 4 VO 3 ; Weigh 0.348 grams of Li 2 O as a sintering aid, grind and mix well.

[0028] The obtained mixture was pre-sintered for the first time in an air atmosphere at a sintering temperature of 650° C. for 6 hours, cooled naturally, ground and mixed uniformly.

[0029] The mixture obtained after the first pre-sintering is continued to be calcined for the second time in an air atmosphere, the calcining temperature is 850° C., the calcining time is 5 hours, cooled naturally, ground and mixed uniformly.

[0030] The mixture obtained after the second calcination was calcined for the third time in an air atmosphere, the calcination temperature was 1100°C, the calcination time was 8 hours, and cooled to room temperature to obtain powdery niobium Nb and vanadium V doped t...

Embodiment 2

[0038] According to the chemical formula TiTa 10.6 Nb 5.4 V 2 o 47 The stoichiometric ratio of each element in , respectively weighed 0.2 grams of TiO 2 , 9.493 g TaCl 5 , 3.588 g NbCl 5 , 0.455 g V 2 o 5 ; Weigh 0.13 grams of Li 2 CO 3 As a sintering aid, grind and mix well. The obtained mixture was pre-sintered for the first time in an air atmosphere at a sintering temperature of 650° C. for 6 hours, cooled naturally, ground and mixed uniformly. The mixture obtained after the first pre-sintering is continued to be calcined for the second time in an air atmosphere, the calcination temperature is 850°C, the calcination time is 5 hours, cooled naturally, ground and mixed uniformly; the mixture obtained after the second calcination Carry out the third calcination in an air atmosphere, the calcination temperature is 1100°C, the calcination time is 8 hours, and cooled to room temperature to obtain powdery niobium Nb and vanadium V doped titanium tantalate photocatalyst. ...

Embodiment 3

[0040] According to the chemical formula TiTa 17.8 Nb 0.1 V 0.1 o 47 The stoichiometric ratio of each element in, respectively weighed 0.399 grams of TiO 2 , 19.669 g Ta 2 o 5 , 0.067 g Nb 2 o 5 , 0.0665 g NH 4 VO 3 ; Weigh 0.196 grams of LiF as a sintering aid, grind and mix evenly. The obtained mixture was pre-sintered for the first time in an air atmosphere at a sintering temperature of 650° C. for 6 hours, cooled naturally, ground and mixed uniformly. The mixture obtained after the first pre-sintering is continued to be calcined for the second time in an air atmosphere, the calcination temperature is 850 ° C, the calcination time is 5 hours, cooled naturally, ground and mixed uniformly; the obtained after the second calcination The mixture was calcined for the third time in air atmosphere, the calcining temperature was 1100°C, the calcining time was 8 hours, and cooled to room temperature to obtain powdery niobium Nb and vanadium V doped titanium tantalate photoc...

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Abstract

The invention discloses a titanium tantalate-based photocatalyst doped with niobium and vanadium as well as a preparation method and application of the titanium tantalate-based photocatalyst, and belongs to the field of inorganic photocatalytic materials. According to the stoichiometric ratio of TiTa18-x-yNbxVyO47, wherein x and y are respectively the molar volumes of Nb<5+> doped and substitutedTa and V<5+> doped and substituted Ta, x is 0.1 to 5.4 and y is 0.1 to 2, raw materials containing Ti<4+>, Nb<5+>, Ta<5+> and V<5+> are weighed, a proper amount of a compound containing Li<+> ions isweighed as a sintering aid, and the pure phase titanium tantalate-based photocatalyst doped with niobium and vanadium is obtained by adopting a stepped sintering process. According to the invention, the titanium tantalate-based photocatalyst is obtained by doping the Nb with the V and the absorption in a visible light range is enhanced; meanwhile, lattice disturbance greatly improves the separation efficiency of photo-induced charge and enhances the photocatalytic ability. The titanium tantalate-based photocatalyst doped with niobium and vanadium is simple in preparation technology, low in cost, good in stability of photocatalytic materials, and capable of degrading organic pollutants under the irradiation of ultraviolet light and near ultraviolet light, and especially degrading the organic pollutants in water, thereby facilitating environmental protection.

Description

technical field [0001] The invention relates to an inorganic photocatalyst and a preparation method thereof, in particular to a titanium tantalate-based photocatalyst doped with niobium and vanadium, a preparation method and an application thereof, belonging to the field of inorganic photocatalytic materials. Background technique [0002] The development of industry in today's world has brought serious environmental pollution and energy crisis, and seriously affected the sustainable development and the improvement of people's quality of life. For example, in recent years, the problem of dye sewage has become very prominent and has become a major concern for water pollution. How to remove dyes in water efficiently and without residue under green and environment-friendly conditions has become a key technology for researchers to solve water pollution. Among them, using photocatalytic technology to solve water pollution caused by dyes is one of the promising technical solutions....

Claims

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Application Information

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IPC IPC(8): B01J23/22C02F1/32C02F101/30
CPCC02F1/32B01J23/22C02F2101/30C02F2305/10B01J35/39
Inventor 黄彦林米龙庆刘宣宣魏东磊
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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