A kind of high-performance nanometer tio2 photocatalyst material and preparation method thereof

A photocatalyst and high-performance technology, applied in chemical instruments and methods, physical/chemical process catalysts, energy and wastewater treatment, etc., can solve the problems of high preparation process requirements, low degradation efficiency, high cost, etc., and meet the requirements of degradation conditions. High, increase the specific surface area, increase the effect of adsorption quantity

Active Publication Date: 2016-02-24
GRIMAT ENG INST CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of photocatalyst material has the following disadvantages: (1) the degradation efficiency is low, and the degradation efficiency of ordinary P25 is only about 50%; (2) the number of degraded organic pollutants is limited, and P25 has no degradation effect on a small amount of organic pollutants; (3) The control of the crystal form is not good, and the single anatase form control of the P25 crystal form cannot be realized; (4) The cost is high, and the preparation process requires relatively high conditions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of high-performance nanometer tio2 photocatalyst material and preparation method thereof
  • A kind of high-performance nanometer tio2 photocatalyst material and preparation method thereof
  • A kind of high-performance nanometer tio2 photocatalyst material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Hollow nanostructure polyhedral TiO 2 The preparation process is as follows:

[0031] (1) select the titanium powder 0.1mmol that selects purity to be 99.99%, the hydrofluoric acid 0.1ml that mass percentage concentration is 40%, the hydrogen peroxide 3ml that mass percentage concentration is 30%, titanium powder, hydrofluoric acid and hydrogen peroxide are in deionized water After mixing evenly, transfer to the reactor;

[0032] (2) Seal the reaction kettle, place the reaction kettle in an oven at 180° C. for 3 hours;

[0033] (3) Reactor is naturally cooled, and then the solid product is collected by centrifugation;

[0034](4) Redisperse the collected solid product into a reaction kettle equipped with ethylene glycol, seal and place the reaction kettle in an oven at 160°C for 72 hours;

[0035] (5) Cool the reactor naturally, centrifuge and separate the solid product, and dry to obtain the hollow nanostructure polyhedral TiO 2 .

Embodiment 2

[0037] Hollow nanostructure polyhedral TiO 2 It can also be obtained by changing the time and temperature of placing the reaction kettle in the air box after sealing in step (4) of Example 1. After sealing the reaction kettle in step (4) of Example 1, place it in an oven at 220° C. for 48 hours.

[0038] figure 1 Shown is the hollow nanostructure polyhedral TiO prepared in embodiment 1, 2 2 Schematic diagram of the structure, the interior is a hollow structure as shown by the dotted line in the figure.

Embodiment 3

[0040] In embodiment 1 step (1), select the titanium powder 0.1mmol that purity is 99.99%, the hydrofluoric acid 0.13ml that mass percent concentration is 40%, the hydrogen peroxide 3ml that mass percent concentration is 30%, titanium powder, hydrofluoric acid Mix with hydrogen peroxide in deionized water and transfer to the reaction kettle, and the rest of the steps remain unchanged. That is, changing the molar ratio of titanium powder to hydrofluoric acid in step (1) of Example 1 to be 1:15 can prepare hollow nanostructure polyhedral TiO with different shapes. 2 .

[0041] figure 2 Shown is the hollow nanostructure polyhedron TiO prepared in embodiment 3 2 Schematic diagram of the structure, the interior is a hollow structure as shown by the dotted line in the figure.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
purityaaaaaaaaaa
Login to View More

Abstract

A high-performance nanometer TiO2 photocatalyst material and a preparation method thereof. The photocatalyst material is formed by hollow polyhedral TiO2 particles with nanostructures, wherein the hollow polyhedral TiO2 particles with nanostructures have an internal and external double-layer high active surface structure with exposed surfaces of {101} faces, and have pore size of 100-200 nm. The preparation method is as follows: (1) evenly mixing titanium powder, hydrofluoric acid and hydrogen peroxide in deionized water and transferring the mixture to a reaction kettle; (2) sealing the reaction kettle, and insulating at 180 DEG C for 3 h; (3) naturally cooling and conducting centrifugal separation to collect a solid product; (4) re-dispersing the solid product to the reaction kettle filled with ethylene glycol, placing the sealed reaction kettle in an oven and insulating at 160-220 DEG C for 48-72 h; and (5) naturally cooling, conducting centrifugal separation, and drying the product. The photocatalytic material has high photocatalytic activity and capability of degradation of organic pollutants, and can be directly applied to photocatalytic degradation of organic pollutants in water at room temperature in sunlight; and the preparation method of the photocatalyst material is simple and low in cost.

Description

technical field [0001] The invention relates to a kind of high-performance nano TiO 2 Photocatalyst material and its preparation method. Background technique [0002] Photocatalysts can effectively absorb organic pollutants in wastewater through physical and chemical actions and photocatalytically degrade these pollutants into CO 2 and H 2 A general term for a class of practical reagents for O. [0003] Commonly used photocatalysts are nanostructured ZnO, CdS, CdTe, CuO, TiO 2 , and composites of these nanosulfides and oxides. Nanostructured TiO 2 It has a large band gap and good chemical stability, and has a strong photocatalytic degradation ability for residual organic pollutants in wastewater such as methylene blue, methylene blue, methyl orange, phenol and Sudan red. [0004] At present, the catalysts used commercially to degrade organic pollutants are mainly P25 mixed crystal photocatalysts. This kind of photocatalyst material has the following disadvantages: (1)...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): B01J21/06B01J35/10C02F1/30
CPCY02W10/37
Inventor何明明莫茂松熊玉华杜军
OwnerGRIMAT ENG INST CO LTD