Iron and chrome co-doped nano titanium dioxide/zeolite compound photocatalyst and preparation method thereof

A nano-titanium dioxide and co-doping technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problem of low photocatalytic activity, achieve high photocatalytic activity, easy recycling, and great social and economic benefits and industrial application prospects

Inactive Publication Date: 2010-07-21
河北地质大学
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to TiO 2 The forbidden band width is about 3.2eV, which requires ultraviolet light excitation, and the el

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
  • Iron and chrome co-doped nano titanium dioxide/zeolite compound photocatalyst and preparation method thereof
  • Iron and chrome co-doped nano titanium dioxide/zeolite compound photocatalyst and preparation method thereof
  • Iron and chrome co-doped nano titanium dioxide/zeolite compound photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1:

[0024] Negative modification of zeolite surface: Weigh 25g of zeolite into a three-necked flask, add 0.5mL mercaptopropyltrimethoxysilane coupling agent and 0.5mL anhydrous ethanol mixed solution (modification amount of coupling agent is 2wt% of zeolite), Heat the oil bath to 120°C, heat and stir at a constant temperature for 30 minutes to obtain the zeolite modified by the silane coupling agent; weigh 10g of the silane-modified zeolite and add 4mL 30% H 2 O 2 And 20mL HOAc mixed solution (sulfhydryl group oxidation is 10 times the theoretical amount of sulfonic acid group oxidant), and oxidized at 50°C for 2h to obtain negatively-modified zeolite.

[0025] Nano TiO 2 / Load of zeolite composite material: weigh 15g negatively modified zeolite, add 150mL deionized water to make a slurry; pipette 41.7mL TiCl with a concentration of 1.93mol / L 4 Solution (TiO 2 TiCl required for theoretical loading of 30wt% 4 Solution amount), and weigh out 0.0207g FeCl 3 ·6H 2 O and ...

Example

[0031] Embodiments 2-13: The method is the same as the above-mentioned embodiment, and the ratio and conditions are shown in Table 2.

[0032] Table 2 of the proportions and conditions of Examples 1-13

[0033] Implement

[0034] Implement

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

No PUM Login to view more

Abstract

The invention provides an iron and chrome co-doped nano titanium dioxide/zeolite compound photocatalyst and a preparation method thereof, and relates to sewage and waste gas treatment. The iron and chrome co-doped nano titanium dioxide/zeolite compound photocytalyst is characterized in that: nano TiO2 is doped with 0.5 to 2.5 weight percent of iron and chrome ions; the mass ratio of Fe3+ to Cr3+ is controlled to be 1:1-4; the Fe3+ and Cr3+ ions and Ti4+ ions with positive electricity are self-assembled on a zeolite substrate modified by negative electricity under the action of electrostatic attraction, the metal ions are combined together and then the zeolite substrate is baked to prepare the photocatalyst; and nano TiO2 crystals are mixed crystals of anatase crystals and rutile crystals. The iron and chrome co-doped nano titanium dioxide/zeolite compound photocatalyst has the advantages that: compared with the prior art, the compound material has the photocatalytic activity improved by over 40 percent, is filtered and dried for recycling, and then can still have relatively high photocatalytic activity; and the iron and chrome co-doped nano titanium dioxide/zeolite compound photocatalyst has the advantages of low cost, easy recycling, no pollution, great social and economic benefits, and good industrial application prospect.

Description

technical field [0001] The invention relates to the technical field of sewage and waste gas treatment. Background technique [0002] The treatment of organic pollutants in sewage and waste gas is an important problem that needs to be solved urgently in the environmental field, and it is also a key problem that the country urgently needs to solve. Nano-semiconductor photocatalysis technology provides a new way for sewage and waste gas treatment. Using this technology can almost non-selectively mineralize all organic pollutants. It is considered to be the most environmentally friendly advanced treatment technology for environmental pollutants. TiO in semiconductor 2 Due to the advantages of no photocorrosion after exposure to light, good acid and alkali resistance, stable chemical properties, no toxicity to organisms, abundant sources, and high photocatalytic activity, it is the focus of current research. Nano-TiO 2 Due to the disadvantages of easy agglomeration and difficu...

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): B01J29/076B01J37/34
Inventor 李艳王程
Owner 河北地质大学
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