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A high temperature phase tio 2 (b) Preparation method of the material

A high-temperature, pure-phase technology, applied in the field of photocatalytic degradation of pollutants, can solve problems such as limited applications, and achieve the effects of simple preparation methods, low raw material prices, and good thermal stability

Active Publication Date: 2020-10-16
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the TiO prepared by these methods 2 (B) After the temperature is above 500 °C, the crystal phase will gradually transform into anatase phase, which limits its application in some fields
TiO2 has not been inhibited at high temperature 2 (B) Phase transition reports

Method used

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  • A high temperature phase tio <sub>2</sub> (b) Preparation method of the material
  • A high temperature phase tio <sub>2</sub> (b) Preparation method of the material
  • A high temperature phase tio <sub>2</sub> (b) Preparation method of the material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 6 mL of titanium tetra-n-butoxide and 3 mL of acetic acid into 20 mL of ethylene glycol, stir evenly for 15 min, then add 30 mL of 15 mol / L NaOH aqueous solution, and continue stirring for 10 min. The resulting mixture was transferred to a 100 mL hydrothermal reactor, placed in an oven at 180 °C for 12 h, cooled to room temperature naturally, taken out, filtered with suction and washed with deionized water and ethanol until neutral, and the obtained filtrate Stir in 300 mL of 0.1 mol / L HCl aqueous solution for 12 h, filter with suction, wash with deionized water and ethanol until neutral, and dry at 80 °C for 12 h to obtain TiO 2 (B) Precursor H 2 Ti 4 o 9 . 0.3 g TiO 2 (B) Precursor H 2 Ti 4 o 9 Disperse with 0.01 mL of hydrofluoric acid (the mass fraction of hydrogen fluoride is 49%) in 10 mL of deionized water, place in a 20 mL small crucible and stir evenly for 4 h to form a uniformly dispersed suspension. The mass of hydrogen fluoride in the obtained sus...

Embodiment 2

[0025] In this example, the amount of hydrofluoric acid used is 0.03 mL, and the other steps are the same as in Example 1 to obtain the high-temperature phase TiO 2 (B) Material, recorded as 0.3% F-HT.

Embodiment 3

[0027] In this example, the amount of hydrofluoric acid was 0.05 mL, and the other steps were the same as in Example 1 to obtain the high-temperature phase TiO 2 (B) Material, recorded as 0.5% F-HT.

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Abstract

The invention discloses a preparation method of a high temperature phase TiO2(B) material. The preparation method comprises the steps that firstly a TiO2(B) precursor or a pure phase TiO2(B) is prepared by a conventional method, and then a fluoride, distilled water and the TiO2 (B) precursor or the pure phase TiO2(B) are uniformly mixed, slowly evaporated, and then subjected to high temperature thermal oxidation treatment in an atmospheric atmosphere to obtain a high temperature phase TiO2(B) excellent in stability. The preparation method is simple, is low in raw material price, has no complete phase transformation of the material at a high temperature, has good thermal stability, is environmentally friendly, and can be effectively applied to the fields of photocatalysis, electrocatalysis,photoelectric catalysis, lithium ion batteries and the like.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic degradation of pollutants, in particular to a high-temperature phase TiO 2 (B) Preparation method of the material. Background technique [0002] TiO 2 (B) is a homogeneous variant of metastable titanium oxide with a lower density than anatase and rutile and a loose structure. It has attracted much attention in the fields of lithium-ion batteries, capacitors, sensors, and photocatalysis and photoelectrocatalysis. At present, people can prepare TiO by various methods 2 (B), the traditional preparation method is acetic acid solvothermal method (Changhua Wang, Xintong Zhang and Yichun Liu. Coexistence of anatase / TiO 2 (B) heterojunction and anexposed (001) facet in TiO 2 nanoribbon photocatalysts synthesized via afluorine-free route and topotactic transformation[J]. Nanoscale, 2014, 6:5329–5337.), strong alkali hydrothermal method (Yan X, Zhang Y, Zhu K, et al.Enhanced electrochemical prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047C01G23/07B01J21/06
CPCB01J21/063B01J35/0033B01J35/004C01G23/047C01G23/07
Inventor 马艺王奕岚王子豪张婉尹志广王增林
Owner SHAANXI NORMAL UNIV
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