Noble metal orientation load titanium dioxide photocatalyst and preparation method thereof

A titanium dioxide, photocatalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst carrier, etc., can solve the practical application of restricting the performance of photocatalyst, and the recombination rate of photogenerated carriers is high. , narrow spectral response range, etc., to achieve the effects of easy control of preparation parameters, improved photon efficiency, and good repeatability

Active Publication Date: 2012-06-20
厦门下元环保科技有限公司
View PDF4 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the energy band structure of titanium dioxide itself determines that it still has some defects in the application of photocatalytic technology: (1) The band gap of titanium dioxide is wide (3.0 eV for rutile, 3.2 eV for anatase), and the spectral response range is narrow , the light absorption wavelength is mainly concentrated in the ultraviolet region (< 387.5 nm), and the ultraviolet light radiated to the ground only accounts for about 5% of sunlight, so from the perspective of utilizing solar energy, the efficiency of titanium dioxide in utilizing solar energy is very low
(2) The reco

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
  • Noble metal orientation load titanium dioxide photocatalyst and preparation method thereof
  • Noble metal orientation load titanium dioxide photocatalyst and preparation method thereof
  • Noble metal orientation load titanium dioxide photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: Preparation of titania carrier material

[0032] keep the temperature at 0 o Under the condition of C, 9.5mL of titanium tetrachloride was added dropwise to 30.5mL of deionized water under magnetic stirring to form a solution with a titanium ion concentration of 2.1M, and the resulting solution was stirred for 8 hours, and then Slowly warm up to 25 o C and insulated and stirred for 8 hours to obtain a colloidal solution, the obtained colloidal solution was packed into a polytetrafluoroethylene liner with a filling degree of 40%, the liner was put into a stainless steel hydrothermal kettle, and placed in a program-controlled oven at 120°C After heat treatment for 10 hours, a white precipitate was obtained, which was washed several times with deionized water, dried in an oven at 40°C for 20 hours, and finally titanium dioxide microspheres were obtained. Analysis by X-ray diffraction pattern shows that its phase is titanium dioxide of rutile phase. Observi...

Embodiment 2

[0033] Example 2: Preparation of noble metal oriented loaded titanium dioxide photocatalyst

[0034] Take 0.025mmol of chloroplatinic acid to make 60mL of aqueous solution, after fully stirring, add 0.5g of the titanium dioxide support material prepared in Example 1, and then vigorously stir for 2 hours. Keep the stirring speed constant, place the obtained suspension under a xenon lamp, and turn on the xenon lamp to illuminate for 6 hours. After the light is finished, let the suspension stand still, discard the supernatant, collect the precipitate, wash and centrifuge several times with deionized water to obtain the final product, put the product in an oven, and dry it at 80°C for 5 hours to obtain the noble metal platinum-modified titanium dioxide powder. figure 1 The X-ray diffraction spectrum of the self-assembled titanium dioxide microsphere powder modified by metal platinum modified in this embodiment, as can be seen from the spectrum, its phase is titanium dioxide of th...

Embodiment 3

[0035] Embodiment 3: the preparation of titania carrier

[0036] at a temperature of 20 o Under the condition of C, 36.2mL of titanium tetrachloride was added dropwise to 53.8mL of deionized water under the action of a magnetic stirrer to form a solution with a titanium ion concentration of 3.6M, and the resulting solution was stirred for 0.5 hours. Then slowly increase the temperature to 50 o C and insulated and stirred for 8 hours to obtain a colloidal solution, and the obtained colloidal solution was packed into a polytetrafluoroethylene lining with a filling degree of 90%, and the lining was put into a stainless steel hydrothermal kettle and placed in a program-controlled oven at 200°C After heat treatment for 2 hours, a white precipitate was obtained, which was washed several times with deionized water, dried in an oven at 80°C for 5 hours, and finally titanium dioxide microspheres were obtained. Analysis by X-ray diffraction pattern shows that its phase is titanium dio...

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
Average particle diameteraaaaaaaaaa
Average particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a noble metal orientation load titanium dioxide photocatalyst and a preparation method thereof. A titanium dioxide carrier has a rutile phase structure and a uniform spherical appearance, wherein the microsphere diameter is about 10 to 16 mu m; the surface is cracked; the titanium dioxide carrier is formed by self-assembling nanowires with the length of 5 to 8 mu m and diameter of 3 to 6 mu m; and the exposed surface of each nanowire is a crystal face (110). The noble metal is one or more of platinum, gold, ruthenium, rhodium, silver and palladium; the load quantity of the noble metal is 0 to 3 percent of the mass of the titanium dioxide carrier; the noble metal exists in the form of a zero-valence simple substance; the grain size of the noble metal is 2 to 10 nm; and the noble metal is orientationally deposited on the crystal face (110) of the titanium dioxide nanowires. The noble metal load titanium dioxide material serving as an effective photocatalyst is applied to light degradation of organic pollutants in a waste water solution.

Description

[0001] technical field [0002] The invention relates to a noble metal directional loaded titanium dioxide photocatalyst in the field of semiconductor photocatalysis and a preparation method thereof. Background technique [0003] Under the background of global energy shortage and environmental deterioration, people have to speed up the pace of new energy development and environmental protection, so the development and utilization of solar energy has attracted great attention from all countries in the world. Among them, photocatalytic technology has the advantages of direct utilization of solar energy, low cost of catalytic materials, environmental friendliness, and no secondary pollution, and has become a key research object in the field of energy and environmental protection. With the rapid development of photocatalysis technology, photocatalysis is forming an independent research field, and has played an important role in solar energy conversion, synthesis of new substa...

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
IPC IPC(8): B01J23/42B01J23/46B01J23/50B01J23/52B01J32/00C02F1/30C02F1/32
CPCY02W10/37
Inventor 李广社张俊李莉萍颜廷江关翔锋
Owner 厦门下元环保科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap