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Titanium dioxide particles with quick-acting and long-acting photocatalysis and preparation method thereof

A titanium dioxide and photocatalyst technology, applied in the field of titanium dioxide particles composed of quick-acting and long-acting and its preparation, can solve the problems of inability to continuously degrade for a long time, decrease in degradation efficiency, and inability to degrade rapidly, and achieve long shelf life and strong degradation activity. , the preparation method is simple

Inactive Publication Date: 2020-03-27
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The physical and chemical properties of titanium dioxide are not only related to particle size, surface area and morphology, but also related to its highly active crystal facets. Slow, unable to degrade quickly. During the degradation process, as the degradation time prolongs, the degradation efficiency will decrease more or less, and it cannot continue to degrade for a long time

Method used

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  • Titanium dioxide particles with quick-acting and long-acting photocatalysis and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: A kind of preparation method containing titanium dioxide photocatalyst

[0028] (1) Preparation of fast-acting titanium dioxide composite particles:

[0029] a. Take 10 g of chitosan and 15 g of potassium permanganate and place them in a universal pulverizer respectively, and pulverize them into powders with a particle size of 20 to 60 μm for later use;

[0030] b. Take 7g of sodium carboxymethyl cellulose and place it in a suitable container, first add purified water, stir to disperse and dissolve at a controlled temperature of 45°C, the stirring speed is 70r / min, the stirring time is 2.5h, and then continue Stirring conditions are, add absolute ethanol to obtain sodium carboxymethyl cellulose solution, and set aside; the mass ratio of the sodium hydroxymethyl cellulose to purified water is 1:25, and the volume ratio of the purified water to absolute ethanol 1:1;

[0031] c. get the nanoscale titanium dioxide 45g of chitosan after pulverization, formula...

Embodiment 2

[0038] Embodiment 2 A kind of preparation method containing titanium dioxide photocatalyst

[0039] (1) Preparation of fast-acting titanium dioxide composite particles:

[0040] a. Take 10 g of chitosan and 10 g of potassium permanganate and place them in a universal pulverizer respectively, and pulverize them into powders with a particle size of 20 to 60 μm for later use;

[0041] b. Put 5g of sodium carboxymethyl cellulose in a suitable container, first add purified water, stir to disperse and dissolve at a controlled temperature of 40°C, the stirring speed is 60r / min, the stirring time is 2h, and then continue to stir The conditions are, adding absolute ethanol to obtain sodium carboxymethyl cellulose solution, for subsequent use; the mass ratio of the sodium hydroxymethyl cellulose to purified water is 1:20, and the volume ratio of the purified water to absolute ethanol is 1:1;

[0042] c. get the nanoscale titanium dioxide 40g of chitosan after pulverization, formula qu...

Embodiment 3

[0049] Embodiment 3: A kind of preparation method containing titanium dioxide photocatalyst

[0050] (1) Preparation of fast-acting titanium dioxide composite particles:

[0051] a. Take 10g of chitosan and 30g of potassium permanganate and place them in a universal pulverizer respectively, and pulverize them into powders with a particle size of 20-60 μm, and set aside;

[0052] b. Put 8g of sodium carboxymethyl cellulose in a suitable container, first add purified water, stir to disperse and dissolve at a controlled temperature of 50°C, the stirring speed is 80r / min, the stirring time is 3h, and then continue to stir The conditions are, adding absolute ethanol to obtain sodium carboxymethyl cellulose solution, for subsequent use; the mass ratio of the sodium hydroxymethyl cellulose to purified water is 1:30, and the volume ratio of the purified water to absolute ethanol is 1:1;

[0053] c. get the nano-scale titanium dioxide 60g of chitosan after pulverization, formula quan...

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Abstract

A titanium dioxide-containing photocatalyst is prepared by uniformly mixing titanium dioxide composite particles which take effect quickly and titanium dioxide composite particles which take effect continuously, wherein the titanium dioxide composite particles which take effect quickly are composed of chitosan, nanoscale titanium dioxide, sodium carboxymethyl cellulose and potassium permanganate,and the titanium dioxide composite particles which take effect continuously are composed of hydroxypropyl methyl cellulose and nanoscale titanium dioxide. The titanium dioxide-containing photocatalysthas a long shelf life, has relatively high photocatalytic degradation activity on organic pollutants, and particularly has very strong degradation activity on methyl orange; and the degradation rateof methyl orange degradation for 2 hours reaches 82% or above, the degradation time is short, the efficiency is high, and a continuous simulated degradation experiment shows that the product still hashigh degradation capacity after being continuously degraded for 10 hours, and the preparation method is simple and worthy of market application and popularization.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a quick-acting and long-acting titanium dioxide particle and a preparation method thereof. Background technique [0002] In recent years, the rapid development of industry and economy has also brought serious environmental pollution problems. Therefore, solving environmental pollution problems has become a basic national policy. Since 1972, when Japanese scientists prepared hydrogen through titanium dioxide photolysis of water, many domestic and foreign scientists have applied photocatalysis to the treatment of environmental pollutants. Therefore, photocatalysis has become one of the effective methods to fundamentally solve the problem of environmental pollution. [0003] Among various photocatalysts, nano-titanium dioxide photocatalysts produce active substances with strong redox properties under the excitation of ultraviolet light, which can completely oxidize some tox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J35/02C02F1/30C02F101/30B01J35/00
CPCB01J31/38C02F1/30C02F2101/30C02F2305/10B01J35/50B01J35/39
Inventor 姚昱岑田亮亮单德鑫王维勋谭宁会
Owner CHONGQING UNIV OF ARTS & SCI
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