Method for producing pyromelane type nano-TiO2 powder with Ti(SO4)2 hydrothemal method

A nano-powder, brookite-type technology, applied in the fields of photocatalysis and material chemistry, can solve the problems of difficulty in synthesis, neglect of structure and performance, and difficulty in preparing brookite-type TiO2, and achieve the effect of good photocatalytic activity.

Inactive Publication Date: 2009-05-13
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Anatase and rutile nano-TiO 2 The preparation and physical properties of materials have been extensively carried out. For the metastable phase of nano brookite TiO 2 However, the research on materials has hardly been

Method used

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  • Method for producing pyromelane type nano-TiO2 powder with Ti(SO4)2 hydrothemal method
  • Method for producing pyromelane type nano-TiO2 powder with Ti(SO4)2 hydrothemal method
  • Method for producing pyromelane type nano-TiO2 powder with Ti(SO4)2 hydrothemal method

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Take 1mol / L of Ti(SO 4 ) 2 Transfer 120 mL of the solution to a 500 mL beaker. During stirring with a magnetic stirrer at room temperature, 250 mL of a newly prepared 2 mol / L NaOH solution was added dropwise to the Ti(SO 4 ) 2 solution in a beaker. NaOH and Ti(SO 4 ) 2 The molar ratio of 5:1. During the titration process, a white precipitate was formed, and the stirring was continued for 5 hours, and it was allowed to stand overnight. washed several times by centrifugation, with BaCl 2 Solution test without SO 4 2- exists, and the solution pH=10.61 at this time. The precursor obtained from the above reaction was evenly transferred to six 100mL high-pressure hydrothermal reaction kettles marked with different serial numbers, and then placed in an electric constant temperature blast drying oven. The reaction kettle was taken out after 180°C hydrothermal reaction for different times, and the reaction kettle was taken out and cooled to room temperature naturally....

Embodiment 2

[0027] Take 1mol / L of Ti(SO 4 ) 2Transfer 120 mL of the solution to a 500 mL beaker. During stirring with a magnetic stirrer at room temperature, 200 mL of a newly prepared 2 mol / L NaOH solution was added dropwise to the Ti(SO 4 ) 2 solution in a beaker. NaOH and Ti(SO 4 ) 2 The molar ratio of 3:1. During the titration process, a white precipitate was formed, and the stirring was continued for 5 hours, and it was allowed to stand overnight. washed several times by centrifugation, with BaCl 2 Solution test without SO 4 2- exist. The precursor obtained from the above reaction was evenly transferred to six 100mL high-pressure hydrothermal reaction kettles marked with different serial numbers, and then placed in an electric constant temperature blast drying oven. The reaction kettle is taken out after 150°C hydrothermal reaction for different times, and the reaction kettle is naturally cooled to room temperature, washed, and the product is dried in an electric constant ...

Embodiment 3

[0029] Take 1mol / L of Ti(SO 4 ) 2 Transfer 120 mL of the solution to a 500 mL beaker. During stirring with a magnetic stirrer at room temperature, 250 mL of a newly prepared 2 mol / L NaOH solution was added dropwise to the Ti(SO 4 ) 2 solution in a beaker. NaOH and Ti(SO 4 ) 2 The molar ratio of 4:1. During the titration process, a white precipitate was formed, and the stirring was continued for 5 hours, and it was allowed to stand overnight. washed several times by centrifugation, with BaCl 2 Solution test without SO 4 2- exist. The precursor obtained from the above reaction was evenly transferred to six 100mL high-pressure hydrothermal reaction kettles marked with different serial numbers, and then placed in an electric constant temperature blast drying oven. The reaction kettle was taken out after being hydrothermally reacted at 180°C for different times. After taking out the reaction kettle, it was naturally cooled to room temperature, washed, and the product was...

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Abstract

The invention relates to the technical field of photo-catalysis and material chemistry, in particular to the preparation of Brookite-type nanoscale TiO2 photocatalyst. The preparation comprises the following steps: adding NaOH solution in Ti(SO4)2 solution dropwise to generate white sediment; stirring; standing; centrifuging multiple times until no SO4<2->; subjecting the precursor obtained by the above reaction to hydrothermal reaction in a high-pressure hydrothermal reaction kettle at 150 to 180 DEG C for 2 to 60 h; washing; and drying to obtain the product. The pure-phase Brookite-type TiO2 photocatalyst has good photocatalytic activity in visual light.

Description

technical field [0001] The invention relates to the technical field of photocatalysis and material chemistry, in particular brookite TiO 2 Preparation of nanopowder photocatalysts. Background technique [0002] The rapid development of human industrial technology has also brought serious environmental pollution problems to people, which is threatening human survival and health. The traditional methods of adsorption, flocculation and biological oxidation can not achieve satisfactory results in the treatment of industrial wastewater, and the energy consumption is high, the cost is high, and the resource occupation is large, which greatly limits the popularization and application. People urgently need to find an ideal and efficient method to treat industrial production wastewater. Therefore, photocatalytic technology has attracted people's attention in environmental protection and sewage treatment, and has become one of the research hotspots. [0003] Photocatalytic technolog...

Claims

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Application Information

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IPC IPC(8): C01G23/053B01J21/06
Inventor 谢吉民吕晓萌丁建林吕平
Owner JIANGSU UNIV
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