Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fe and N co-doped mesoporous TiO2 microsphere array visible light photocatalyst and preparation method

A titanium dioxide, microsphere array technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes and other directions, can solve the problems of low photon quantum efficiency, difficult industrial application, difficult to achieve separation and utilization, etc., to achieve repeated Good properties, reduced compounding rate, and easy control of preparation parameters

Inactive Publication Date: 2016-03-30
BEIJING UNIV OF CHEM TECH
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to TiO 2 The anatase phase has a wide forbidden band width of 3.2eV, and can only absorb ultraviolet light with energy equal to or greater than its forbidden band width (that is, the wavelength is less than or equal to 387.5nm). Most of the absorption wavelength thresholds are in the ultraviolet region, and these ultraviolet light Only accounts for less than 5% of the sun's energy
Therefore pure TiO 2 It is difficult to use visible light or solar energy, and it is difficult to put it into industrial applications; (2) The photon quantum efficiency is low, and the photogenerated electrons and holes are very easy to recombine in the bulk phase and the surface, and it is difficult to achieve effective separation and utilization

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
  • Fe and N co-doped mesoporous TiO2 microsphere array visible light photocatalyst and preparation method
  • Fe and N co-doped mesoporous TiO2 microsphere array visible light photocatalyst and preparation method
  • Fe and N co-doped mesoporous TiO2 microsphere array visible light photocatalyst and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Mix 18ml, 60ml, 320ml of deionized water, 13mol / L ammonia water and absolute ethanol, stir at 30°C for 1 hour, then add 29.16g of tetraethyl orthosilicate and 400ml of Anhydrous ethanol mixture, stirred at 30°C for 20h, after the reaction, washed with ethanol and deionized water several times, centrifuged at a slow speed for 10h to self-assemble, calcined at 750°C, and then soaked in benzoyl peroxide and methyl Polymerize at 60°C in a solution with a mass ratio of methyl acrylate of 1:84. The excess polymer was removed with tetrahydrofuran, and the silica template was removed with 5% HF solution to obtain a PMMA (polymethyl methacrylate) counter template.

[0024] (2) Add 2.84g of isopropyl titanate dropwise to 2.4g of hydrochloric acid solution, stir for 1 hour, and record as solution A; add 1.16g of mesoporous agent P123 to 4g of absolute ethanol, stir until dissolved, and record as solution B solution; then the B solution is divided into two parts, one part is a...

Embodiment 2

[0029] The preparation method of Fe, N co-doped titania microsphere array catalyst, the steps are the same as in Example 1, the difference is: used 0.65% FeCl 3 .6H 2 The mass of O in ethanol is 0.1 g

[0030] Weigh 0.02g of Fe, N co-doped titanium dioxide opal catalyst prepared above to carry out the experiment of visible light catalytic degradation of rhodamine B, the concentration of rhodamine B is 5mg L -1 , rhodamine after visible light irradiation for 100min

Embodiment 3

[0032] The preparation method of Fe, N co-doped titania opal catalyst, step is the same as embodiment 1, difference is: used 0.65%FeCl 3 .6H 2 The mass of O in ethanol is 0.3 g

[0033] Weigh 0.02g of Fe, N co-doped titanium dioxide opal catalyst prepared above to carry out the experiment of visible light catalytic degradation of rhodamine B, the concentration of rhodamine B is 5mg L -1 , the degradation rate of rhodamine B after visible light irradiation for 100min was 91.2%.

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a Fe and N co-doped mesoporous TiO2 microsphere array visible light photocatalyst and a preparation method and belongs to the technical field of TiO2 photocatalysis. The photocatalyst is a three-dimensional ordered Fe and N co-doped mesoporous TiO2 microsphere array prepared with a two-step template method, and microspheres are arranged orderly in a three-dimensional manner, have uniform size and obvious mespores and are all anatase. TiO2 is modified through Fe and N co-doping, and the Fe and N co-doped TiO2 microsphere array is obtained; due to a slow photon effect and a multiple scattering effect of the microsphere array and the excellent mass transfer performance and high specific surface area of a hierarchical porous (macroporous or mesoporous) material, light absorption of TiO2 can be improved. The smallest band gap of Fe and N co-doped TiO2 is realized at the optimal doping content, and absorbed light is extended to visible light. The solar energy utilization rate can be increased by the aid of Fe and N co-doped TiO2. The method is easy to operate and control, and the visible light photocatalytic performance is good.

Description

technical field [0001] The invention relates to the field of titanium dioxide photocatalysis, in particular to the preparation and application of Fe and N co-doped titanium dioxide microsphere array visible light photocatalysts. Background technique [0002] With the advancement of global industrialization, environmental pollution, energy crisis, and greenhouse effect have become major problems faced by human beings in the 21st century. How to achieve environmental protection and sustainable development has become a hot spot of research at home and abroad. A large number of studies have shown that various toxic and harmful pollutants in water and air, various alkanes, aromatic hydrocarbons and their derivatives, halogenated compounds, polycyclic aromatic hydrocarbons and heterocyclic compounds emitted in chemical production can be photocatalytically degraded. TiO 2 Due to its stable chemical properties, light corrosion resistance, chemical corrosion resistance, harmless to ...

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 & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F1/58
CPCB01J27/24C02F1/30C02F1/58C02F2101/30C02F2305/10
Inventor 徐联宾柴文霞陈建峰熊瑛瑛
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com