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Preparation method of photo catalytic active chlorine adulterated titanium dioxide nano material

A photocatalytic activity, titanium dioxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effect of simple preparation method and high light quantum efficiency

Inactive Publication Date: 2004-12-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After literature search, it was found that there is no relevant preparation method of chlorine-doped titanium dioxide nanomaterials

Method used

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  • Preparation method of photo catalytic active chlorine adulterated titanium dioxide nano material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026]15ml of aqueous hydrogen chloride solution (1mol / L) was reacted with 20ml of tetrabutyl titanate (mass percentage>98.0%) until white precipitate was completely formed. The white precipitate was directly heated in an oven, treated at 120°C for 8 hours, and evaporated to remove water and alcohols produced in the reaction to obtain a solid dry product. Then grind the obtained dry solid to make the particles uniform and reduce soft agglomeration. Put it into a muffle furnace after grinding, and calcinate at 310° C. for 2 hours to obtain a chlorine-doped titanium dioxide nano-powder catalyst material with high catalytic activity under visible light. In the catalytic activity test, the first-order reaction kinetics apparent rate constant k=5.26×10 of the catalyst material catalyzes the degradation of phenol -3 min -1 , is titanium dioxide powder (P25, Degussa) first-order reaction kinetics apparent rate constant k=1.04×10 -3 min -1 It can be seen that after heat treatment ...

Embodiment 2

[0029] 15ml of hydrogen chloride aqueous solution (1mol / L) was reacted with 20ml of titanium sulfate (mass percentage>40.0%) until white precipitate was completely formed. Rinse the resulting white precipitate with deionized water until the anion (sulfate ion) concentration is less than 0.5 mg / L. It was then filtered to collect the precipitated material washed with deionized water. The white precipitate was directly heated in an oven, treated at 120°C for 8 hours, and evaporated to remove water and alcohols produced in the reaction to obtain a solid dry product. Then grind the dry solid to make the particles uniform and reduce soft agglomeration. Then it is placed in a muffle furnace and calcined at 350° C. for 2 hours to obtain a chlorine-doped titanium dioxide nano-catalyst material with high catalytic activity under visible light. In the catalytic activity test, the first-order reaction kinetics apparent rate constant k=4.61×10 of the catalyst material catalyzes the degra...

Embodiment 3

[0031] 10ml of sodium chloride solution (2mol / L) was reacted with 20ml of tetrabutyl titanate (mass percentage>98.0%) until white precipitate was completely formed. The white precipitate was directly heated in an oven, treated at 120°C for 8 hours, and evaporated to remove water and alcohols produced in the reaction to obtain a solid dry product. Then grind the obtained dry solid to make the particles uniform and reduce soft agglomeration. Put it into a muffle furnace after grinding, and calcinate at 350° C. for 2 hours to obtain a chlorine-doped titanium dioxide nano-catalyst material with high catalytic activity under visible light. In the catalytic activity test, the first-order reaction kinetics apparent rate constant k=4.22×10 of the catalyst material catalyzes the degradation of phenol -3 min -1 , is titanium dioxide powder (P25, Degussa) first-order reaction kinetics apparent rate constant k=1.04×10 -3 min -1 4 times. It can be seen that after heat treatment for 2 ...

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Abstract

A Cl doped nano-class TiO2 material with photocatalytic activity is prepared by doping Cl into TiO crystal. It features that its energy gap can be triggered by visual light, realizing the full-frequency absorption to visual light for increasing its light quantum efficiency.

Description

technical field [0001] The invention relates to a preparation method of a nanometer material, in particular to a preparation method of a photocatalytically active chlorine-doped titanium dioxide nanometer material, which belongs to the field of inorganic nanometer photocatalytic materials. Background technique [0002] Titanium dioxide semiconductor photocatalytic oxidation technology is a new type of modern technology. Because it can widely utilize natural energy—solar energy, and has outstanding features such as low energy consumption, mild reaction conditions, easy operation, and can reduce secondary pollution, it has attracted increasing attention and has broad application prospects. In recent years, semiconductor photocatalysis has become one of the research hotspots in the field of photochemistry and environmental protection, and its application in wastewater treatment has been reported in many literatures. A large number of studies have confirmed that dyes, surfactan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J27/06
Inventor 蔡伟民徐俊王正鹏
Owner SHANGHAI JIAO TONG UNIV
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