TiO2 Thin Film Photocatalytic System for Treatment of High Concentration Organic Wastewater

A technology of titanium dioxide and organic wastewater, which is applied in the fields of special compound water treatment, light water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of restricting industrial application, complicated methods, and poor light transmission, and achieves benefits. Industrial application, simple operation of the preparation process, and the effect of eliminating work blind spots

Active Publication Date: 2021-02-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional application forms of titanium dioxide are mainly nano-powder and film, both of which have certain defects.
For example, titanium dioxide in powder form is difficult to separate and recover from water after sewage reaction, and due to the poor light transmittance of high-concentration organic wastewater, the light utilization rate of titanium dioxide in powder form is extremely low, so traditional powder state photocatalysis Technology cannot effectively treat high-concentration organic wastewater; titanium dioxide thin film technology can solve the separation problem of photocatalyst and water, but most of the preparation methods of titanium dioxide thin film, such as patents such as CN 102828158A and CN104701017A, are costly and complicated, which greatly limits the its industrial application

Method used

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  • TiO2 Thin Film Photocatalytic System for Treatment of High Concentration Organic Wastewater
  • TiO2 Thin Film Photocatalytic System for Treatment of High Concentration Organic Wastewater

Examples

Experimental program
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preparation example Construction

[0045] The preparation method of the glass tube whose outer wall is coated with titanium dioxide thin film comprises the following steps:

[0046] Prepare titanium dioxide slurry and clean the outer wall of the glass tube;

[0047] Apply the titanium dioxide slurry on the outer wall of the glass tube by dipping and pulling method and fully dry to form a titanium dioxide film;

[0048] The glass tube coated with titanium dioxide film is calcined in a muffle furnace.

[0049] The preparation method of described titanium dioxide slurry comprises the following steps:

[0050] A1, mix titanium dioxide powder and ethanol, stir evenly, obtain mixed solution a;

[0051] A2, dissolving carboxymethyl cellulose in terpineol to obtain mixed solution b;

[0052] A3. Mix the mixed liquid a and the mixed liquid b, stir it ultrasonically for 6-8 hours, and then carry out rotary evaporation to obtain the slurry.

[0053] The mass ratio of the mixed liquid a to the mixed liquid b is 1:1-1.5. ...

Embodiment 1

[0066] This embodiment provides a titanium dioxide thin film photocatalytic system for treating high-concentration organic wastewater, and its preparation includes the following steps:

[0067] (1) Preparation of organic carrier

[0068] Dissolve 3 g of carboxymethyl cellulose in 80 g of terpineol and stir overnight to obtain a clear solution for future use.

[0069] (2) Preparation of titanium dioxide slurry

[0070] Take 10g of commercial P25 titanium dioxide powder and mix with 80ml ethanol. After the two are evenly stirred, then add the organic carrier prepared in the first step, stir and sonicate for 6 hours, and then spin-evaporate the obtained solution to finally prepare a titanium dioxide slurry.

[0071] (3) Preparation of titanium dioxide thin film

[0072] A glass test tube with a tube length of 150 mm and a diameter of 15 mm was treated with a plasma cleaner, and then titanium dioxide was coated on the surface of the glass test tube by dipping and pulling method,...

Embodiment 2

[0078] This embodiment provides a titanium dioxide thin film photocatalytic system for treating high-concentration organic wastewater, and its preparation includes the following steps:

[0079] (1) Preparation of organic carrier

[0080] Dissolve 4 g of carboxymethyl cellulose in 90 g of terpineol and stir overnight to obtain a clear solution, which will be used later.

[0081] (2) Preparation of titanium dioxide slurry

[0082] Take 13g of commercial P25 titanium dioxide powder and mix it with 90ml of ethanol. After the two are evenly stirred, add the organic carrier prepared in the first step, stir and sonicate for 7 hours, and spin-evaporate the obtained solution to finally prepare a titanium dioxide slurry.

[0083] (3) Preparation of titanium dioxide thin film

[0084] A glass test tube with a tube length of 150 mm and a diameter of 20 mm was treated with a plasma cleaner, and then titanium dioxide was coated on the surface of the glass test tube by dipping and pulling ...

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Abstract

The invention discloses a titanium dioxide film photocatalytic system for treating high-concentration organic wastewater, which comprises a plexiglass cylinder and a peristaltic pump; the side wall of the plexiglass cylinder is provided with a water inlet, and the bottom is provided with a water outlet. The water inlet and the water outlet are respectively connected to the two ends of the peristaltic pump; the plexiglass cylinder is provided with a number of glass tubes, and each glass tube is provided with a strip-shaped aluminum substrate; the glass tube is a glass tube whose outer wall is coated with a titanium dioxide film ; The strip-shaped aluminum substrate is provided with a number of ultraviolet lamp beads; the ultraviolet lamp beads are connected to a regulated power supply. In this system, the titanium dioxide film is in direct contact with the ultraviolet light, and the ultraviolet light is utilized to the maximum extent. It completely eliminates the working blind area without ultraviolet light irradiation that exists between powdered titanium dioxide and traditional titanium dioxide thin film photocatalysts, and successfully solves the problem that the photocatalytic system cannot be applied due to the poor light transmittance of high-concentration wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a titanium dioxide film photocatalytic system for treating high-concentration organic wastewater, which can be widely used in the field of water treatment; in particular, it relates to a titanium dioxide film prepared by a special method for the photocatalytic system to treat high-concentration organic waste water. Organic waste water. Background technique [0002] In recent years, as a new type of advanced treatment technology, photocatalytic technology has become a research hotspot due to its advantages of fast response, high mineralization rate, no secondary pollution, simple operation and low operation and maintenance costs. [0003] Among many semiconductor photocatalysts, titanium dioxide has attracted much attention due to its advantages of greenness, non-toxicity, good chemical stability and high photocatalytic efficiency. Titanium dioxide can generate str...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C02F1/32C03C17/25
CPCC02F1/32C02F2305/10C03C17/005C03C17/256C03C2217/212C03C2218/111
Inventor赵一新钱旭芳岳东亭蒋乐乐任孟张太阳阚淼李戈徐凤郭男杰
OwnerSHANGHAI JIAO TONG UNIV