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Fe-doped Nb2Ox nano porous material with oxygen deficiency structure and application

A nanoporous, oxygen-deficient technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of few reports of nanoporous materials, achieve strong ultraviolet and visible light absorption ability, preparation method The effect of simple, excellent optical performance

Inactive Publication Date: 2014-06-11
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, current studies on Nb with an oxygen-deficient structure 2 o X There are still few reports on nanoporous materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The Fe-doped Nb with oxygen deficiency structure of this embodiment 2 o X Nanoporous material with a specific surface area of ​​30m 2 / g, pore diameter 6nm, X is about 4.8, and the distance between two adjacent holes is 3nm; the Fe-doped Nb with oxygen deficiency structure 2 o 5 The content of Fe in the nanoporous material is 0.5% of the total mass of Fe and Nb.

[0030] The preparation method of the nanoporous material of the present embodiment comprises the following steps:

[0031] Step 1. Machining the Nb sheet with a thickness of 300 μm into a rectangular sheet with an area of ​​10mm×80mm, then polishing the machined Nb sheet with silicon carbide sandpaper, cleaning the polished Nb sheet, and drying it until use;

[0032] Step 2, formamide and water are uniformly mixed according to the volume ratio of 95:5 to prepare a mixed solvent, and then the NH 4 F was added to the mixed solvent and stirred evenly to obtain NH 4 Electrolyte with F concentration of 0.6mo...

Embodiment 2

[0041] This embodiment is the same as Example 1, except that the anhydrous organic reagent used is ethylene glycol, glycerol, methanol or dimethyl sulfoxide, or ethylene glycol, glycerol, methanol, formamide and at least two of dimethylsulfoxide.

Embodiment 3

[0043] The Fe-doped Nb with oxygen deficiency structure of this embodiment 2 o X Nanoporous material with a specific surface area of ​​70m 2 / g, the pore size is 20nm, X is about 4, and the distance between two adjacent holes is 12nm; the Fe-doped Nb with oxygen deficiency structure 2 o 4 The content of Fe in the nanoporous material is 3% of the total mass of Fe and Nb.

[0044] The preparation method of the nanoporous material of the present embodiment comprises the following steps:

[0045] Step 1. Machining the Nb sheet with a thickness of 300 μm into a rectangular sheet with an area of ​​10mm×80mm, then polishing the machined Nb sheet with silicon carbide sandpaper, cleaning the polished Nb sheet, and drying it until use;

[0046] Step 2, uniformly mixing glycerol and water according to a volume ratio of 99:1 to prepare a mixed solvent, then adding HF into the mixed solvent and stirring evenly to obtain an electrolyte solution with a HF concentration of 2.7mol / L;

[...

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Abstract

The invention discloses a Fe-doped Nb2Ox nano porous material with an oxygen deficiency structure. The specific surface area of the material is 30m<2> / g to 70m<2> / g, the aperture is not less than 5nm, and the distance between two adjacent holes is not less than 3nm; x in the Fe-doped Nb2Ox nano porous material with the oxygen deficiency structure is more than or equal to 4 and less than 5, and the content of Fe is 0.5 to 3 percent of the total weight of the Fe and Nb. In addition, the invention also discloses a preparation method and application of the material. The Fe-doped Nb2Ox nano porous material with the oxygen deficiency structure is excellent in optical performance, strong in ultraviolet and visible light absorption capacity and applicable to the fields such as a gas sensor, a catalyst, and a dye sensitized solar battery. The reversible capacitance of an electrode prepared by the material is 190 to 210 mA.h.g<-1> after being cycled for 500 times and about 93 to 96 percent of that of the electrode in the primary running.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and lithium batteries, and in particular relates to an Fe-doped Nb with an oxygen-deficient structure 2 o X Nanoporous materials and their applications. Background technique [0002] Nb 2 o 5 And niobium-based oxides are not only redox, but also acidic and photosensitive. These properties enable them to be used not only as catalysts but also as catalytic support materials to improve catalytic activity and prolong catalyst life, so they are widely used in the fields of solid acid catalysis, selective oxidation and photocatalysis. At present, research reports have shown that Nb 2 o 5 It is also a lithium-ion electrode material with excellent performance, which can store and release energy quickly, and is expected to be widely used in energy transmission systems such as urban power grids and regenerative braking systems of hybrid electric vehicles. [0003] Therefore, there are many prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52B82Y30/00C25D11/26
CPCB82Y30/00C25D11/26H01M4/48Y02E60/10
Inventor 李广忠汤慧萍张文彦李纲康新婷李亚宁迟煜頔
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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