Cerium-titanium-doped bismuth tantalate niobate photocatalytic material and preparation method and application thereof

A photocatalytic material, bismuth niobium tantalate technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problems of low light absorption efficiency and reduced practical application value, and achieve Effects of improved light absorption, excellent photocatalytic performance, and good optical activity

Active Publication Date: 2019-03-01
XUZHOU NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the light absorption efficiency of bismuth niobate tantalate is low, which reduces the practical application value

Method used

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  • Cerium-titanium-doped bismuth tantalate niobate photocatalytic material and preparation method and application thereof
  • Cerium-titanium-doped bismuth tantalate niobate photocatalytic material and preparation method and application thereof
  • Cerium-titanium-doped bismuth tantalate niobate photocatalytic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: prepare Bi 7.6 Ce 0.4 Ta 7.6 Ti 0.4 Nb 10 o 57

[0028] (1) According to the general chemical formula Bi 7.6 Ce 0.4 Ta 7.6 Ti 0.4 Nb 10 o 57 The stoichiometric ratio of each element in , respectively weigh bismuth oxide Bi 2 o 3 : 8.854 g, ceria CeO 2 : 0.344 g, tantalum pentoxide Ta 2 o 5 : 6.4 g, niobium pentoxide Nb 2 o 5 : 6.625 g, titanium dioxide TiO 2 : 0.16 grams, ground and mixed uniformly to obtain a raw material mixture;

[0029] (2) The raw material mixture obtained in step (1) is placed in a muffle furnace, and the first pre-calcination is carried out under an air atmosphere, the pre-calcination temperature is 300 ° C, and the calcination time is 8 hours;

[0030] (3) Cool the mixture after the first pre-calcination in step (2) to room temperature naturally, grind and mix evenly, then place it in the muffle furnace again, and perform the second calcination in the air atmosphere, the calcination temperature is 950°C , the ca...

Embodiment 2

[0039] Embodiment 2: prepare Bi 7.44 Ce 0.56 Ta 7.44 Ti 0.56 Nb 10 o 57

[0040] (1) According to the general chemical formula Bi 7.44 Ce 0.56 Ta 7.44 Ti 0.56 Nb 10 o 57 The stoichiometric ratio of each element in , respectively weigh bismuth oxide Bi 2 o 3 : 8.667 g, ceria CeO 2 : 0.482 g, tantalum pentoxide Ta 2 o 5 : 8.221 g, niobium pentoxide Nb 2 o 5 : 6.625 g, titanium dioxide TiO 2 : 0.224 grams, ground and mixed uniformly to obtain a raw material mixture;

[0041] (2) The raw material mixture obtained in step (1) is placed in a muffle furnace, and the first pre-calcination is carried out under an air atmosphere, the pre-calcination temperature is 600 ° C, and the calcination time is 2 hours;

[0042] (3) Cool the mixture after the first pre-calcination in step (2) to room temperature naturally, grind and mix evenly, then place it in the muffle furnace again, and perform the second calcination in the air atmosphere, and the calcination temperature is ...

Embodiment 3

[0046] Embodiment 3: prepare Bi 7.76 Ce 0.24 Ta 7.76 Ti 0.24 Nb 10 o 57

[0047] (1) According to the general chemical formula Bi 7.76 Ce 0.24 Ta 7.76 Ti 0.24 Nb 10 o 57 The stoichiometric ratio of each element in the formula, respectively weighed bismuth chloride BiCl 3 : 7.333 g, ceria CeO 2 : 0.123 g, tantalum chloride Nb 2 o 5 : 8.339 g, niobium pentoxide Nb 2 o 5 : 3.975 g, Titanium Dioxide TiO 2 : 0.058 grams, ground and mixed uniformly to obtain a raw material mixture;

[0048] (2) The raw material mixture obtained in step (1) is placed in a muffle furnace, and the first pre-calcination is carried out under an air atmosphere, the pre-calcination temperature is 500 ° C, and the calcination time is 5 hours;

[0049] (3) Cool the mixture after the first pre-calcination in step (2) to room temperature naturally, grind and mix evenly, then place it in the muffle furnace again, and perform the second calcination in the air atmosphere, the calcination tempera...

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Abstract

The invention discloses a cerium-titanium-doped bismuth tantalate niobate photocatalytic material and a preparation method and application thereof. A chemical general formula of the photocatalytic material is Bi<8(1-x)>Ce<8x>Ta<8(1-y)>Ti<8y>Nb<10>O<57>, wherein bismuth tantalate niobate is used as a host material, x is a mole percent of a Ce<3+> and Bi<3+> doped site, y is a mole percent of a Ti<4+> and Ta<5+> doped site, x is greater than or equal to 0.005 and less than or equal to 0.07, y is greater than or equal to 0.005 and less than or equal to 0.07, and x equals y; the photocatalytic material is prepared through a high-temperature solid phase method, is pure in phase and good in crystallinity, is provided with a porous structure, has high absorption capacity within the range of 200-465 nanometers, has good optical activity and can efficiently degrade methylene blue in a photocatalytic mode. The tantalate light emitting material is easy to prepare and low in production cost.

Description

technical field [0001] The invention relates to the field of inorganic photocatalytic materials, in particular to a photocatalytic material of bismuth niobate tantalate doped with cerium and titanium and a preparation method and application thereof. Background technique [0002] With the development and progress of today's industry and society, environmental pollution has become a major problem in globalization, seriously affecting the sustainable development of the economy and the improvement of people's living standards and quality. For example, in recent years, the problem of dye sewage has become very prominent and has become a major concern of water pollution. Better solving this kind of pollution problem has become one of the major challenges we are facing. How to remove dyes in water efficiently and without residue under green and environmental protection conditions has become a key technology for researchers. Among them, using photocatalytic technology to solve water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20C02F1/30C02F101/36C02F101/38
CPCB01J23/002B01J23/20B01J35/004B01J2523/00C02F1/30C02F2101/308C02F2101/36C02F2101/38C02F2101/40C02F2305/10B01J2523/3712B01J2523/47B01J2523/54B01J2523/56B01J2523/57
Inventor 乔学斌王胜家李东振陆浩刘永顺郭佳欢
Owner XUZHOU NORMAL UNIVERSITY
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