Mesoporous manganese-based composite metal oxide as well as preparation method and application thereof

A composite metal, mesoporous manganese-based technology, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve the problems of low specific surface area of ​​materials, high operational risk, long process routes, etc., and achieve high specific surface area. , the preparation method and equipment are simple, and the raw materials are economical and easy to obtain.

Inactive Publication Date: 2013-04-24
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no patent report on the preparation of X-Mn (X=Fe, Co, Ni, Zn) composite metal oxides with mesoporous structure
According to the survey of academic literature, the relevant materials are mainly synthesized by traditional methods such as co-precipitation method and sol-gel method, and the specific surface area of ​​the obtained materials is relatively low.
Some newer synthetic methods are not conducive to large-scale production. For example, the hydrothermal method requires the use of high-temperature and high-pressure reactors, which are expensive and dangerous to operate; while the hard template replication method requires the preparation of mesoporous silica, mesoporous Templates such as carbon, high cost and long process route

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
  • Mesoporous manganese-based composite metal oxide as well as preparation method and application thereof
  • Mesoporous manganese-based composite metal oxide as well as preparation method and application thereof
  • Mesoporous manganese-based composite metal oxide as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～16

[0032] At room temperature, take a total of 60 mmol of manganese salt (MnCl 2 4H 2 O) and a water-soluble divalent transition metal salt (the molar ratio of manganese salt to divalent transition metal salt is represented by Y, as shown in Table 1) were dissolved together in 80 mL of deionized water. Dissolve 60mmol oxalic acid in 30mL deionized water at 80°C. Under vigorous stirring, the oxalic acid solution was added to the metal ion solution, and the stirring was continued for 1 hour to form a precipitate, which was then suction filtered, washed with water, and dried in an oven at 100°C to obtain a single-phase X-Mn composite metal oxalate. Its XRD pattern is shown in figure 1 Shown, DTA curve see figure 2 shown.

[0033] The single-phase composite metal oxalate was placed in a muffle furnace, and the temperature was raised to 300°C at a rate of 1°C / min under normal pressure, and then kept for calcination for 1 hour to obtain a mesoporous X-Mn composite metal oxide. It...

Embodiment 1～5

[0037] Comparative Examples 1-5 Preparation of Mesoporous Single Metal Oxide

[0038] At room temperature, take 60mmol of metal salt (specific metal salt substances are shown in Table 2) and dissolve in 80mL of deionized water. Dissolve 60mmol oxalic acid in 30mL deionized water at 80°C. Under vigorous stirring, the oxalic acid solution was added to the metal ion solution, and the stirring was continued for 1 hour to form a precipitate, which was then suction filtered, washed with water, and dried in an oven at 100°C to obtain a single-phase monometallic oxalate. Its XRD pattern is shown in figure 1 Shown, DTA curve see figure 2 shown.

[0039] Put the single-phase metal oxalate in a muffle furnace, raise the temperature up to 300°C at a rate of 1°C / min under normal pressure, and then heat-preserve and calcinate for 1 hour to obtain a mesoporous single-metal oxide. Its XRD pattern is shown in image 3 Shown, TEM image see Figure 4 shown.

[0040]Table 2 Preparation an...

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
specific surface areaaaaaaaaaaa
pore sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a mesoporous manganese-based composite metal oxide. The specific surface area of the mesoporous manganese-based composite metal oxide is 100-260m<2> / g. A preparation method of the mesoporous manganese-based composite metal oxide comprises the following steps: adding an oxalic acid solution in a metal ion solution in a stirring condition, so as to generate sediments; continuously stirring until sufficient sedimentation is realized; leaching, water washing and drying; and after slowly heating single-phase composite metal oxalate to the temperature of 200-400 DEG C, continuously roasting for 1-4h in a thermal insulation manner, so as to obtain the mesoporous manganese-based composite metal oxide. The preparation process is simple in operation; raw materials are economical and easy to obtain; the large-scale production is easily realized; the obtained material is the manganese-based composite metal oxide with a mesoporous structure and the high specific surface area; a good NO room-temperature adsorption and removal property can be shown; and the application prospect is wide.

Description

technical field [0001] The invention belongs to the field of inorganic nanometer materials, and in particular relates to a mesoporous manganese-based composite metal oxide and its preparation method and application. Background technique [0002] Nitric oxide (NO) is a highly toxic and harmful air pollutant. Nitrogen oxide pollution (NOx, of which NO accounts for more than 95%) at room temperature and with a concentration of several ppm exists widely in urban underground semi-enclosed spaces such as road tunnels and underground parking lots, which far exceeds the national secondary air quality standard and is harmful to the health of relevant personnel. cause serious harm. The active NO treatment technology is mainly selective catalytic reduction (SCR), which has high investment and operation costs and complicated operation, and is only suitable for high temperature (≥200°C) and high concentration (hundreds of ppm and above) in flue gas and automobile exhaust. The removal o...

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): B01J20/06B01J20/30B01D53/02
Inventor 舒杼施剑林
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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