Preparation method for doped iron oxide nanorod catalyst

An iron oxide nanometer, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of less research, and achieve low cost, good stability, and simple and easy preparation methods. Effect

Inactive Publication Date: 2016-04-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are few studies on the growth of one-dimensional nanorods or nanotubes on conductive substrates and the simultaneous one-step preparation of one-dimensional doped iron oxides

Method used

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  • Preparation method for doped iron oxide nanorod catalyst
  • Preparation method for doped iron oxide nanorod catalyst
  • Preparation method for doped iron oxide nanorod catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Using conductive glass (FTO) as a conductive substrate, the substrate was subjected to the above-mentioned pretreatment process. The deposition area of ​​the fixed sample on the FTO conductive surface is 2×2cm 2 , and the rest is sealed with insulating tape; place the pretreated conductive glass in the inner tank of the hydrothermal reactor, with the conductive surface facing the center of the inner tank of the hydrothermal reactor and fix the upper half with insulating tape. Add 0.01mol / LCo(NO 3 ) 2 , 1mol / LNaNO 3 and 0.1mol / LFeCl 3 A mixed solution of water / polyethylene glycol (volume ratio 5:1) is used as a precursor; use 2M concentrated hydrochloric acid solution to adjust the pH value of the solution in the liner to 1, and stir evenly; seal the hydrothermal kettle and put it into the oven Heat at 100°C for 4 hours; after the reaction is completed, cool the hydrothermal kettle to room temperature with the furnace; take out the conductive glass from the hydrother...

Embodiment 2

[0035] A stainless steel substrate was used as the conductive substrate, and the substrate was subjected to the above-mentioned pretreatment. The deposition area of ​​the sample on the surface of the conductive glass is fixed, and the rest is sealed with insulating tape; the pretreated conductive substrate is placed in the inner tank of the hydrothermal kettle, and the conductive surface faces the center of the kettle. Add 0.01mol / LTiCl to the inner tank of the hydrothermal kettle 4 , 1mol / LNaNO 3 and 0.075mol / LFeCl 3 A mixed solution of water / polyethylene glycol (volume ratio 5:1); adjust the pH value of the solution in the liner to 1.69 with 0.5M hydrochloric acid solution, and mix well; put the hydrothermal kettle into the oven for 150 ℃ for 4 hours; after the reaction was completed, the hydrothermal kettle was rapidly cooled to room temperature; the Ti substrate was taken out from the hydrothermal kettle, and the insulating tape was removed after cleaning with deionized ...

Embodiment 3

[0037] A gold-plated FTO was used as the conductive substrate, and the substrate was subjected to the above-mentioned pretreatment. The deposition area of ​​the sample on the surface of the conductive glass is fixed, and the rest is sealed with insulating tape; the pretreated conductive substrate is placed in the inner tank of the hydrothermal kettle, and the conductive surface faces the center of the inner tank. Add 0.05mol / LCo(NO 3 ) 2 , 1mol / LNaNO 3 and 0.1mol / LFeCl 3 Mixed solution of water / polyethylene glycol (volume ratio 5:1); use 0.5mol / L hydrochloric acid solution to adjust the pH value of the solution in the liner to 1.5, and mix well; seal the hydrothermal kettle and put it into the oven Heating at 200°C for 24 hours; after completion, the hydrothermal kettle was rapidly cooled to room temperature; the FTO was taken out from the hydrothermal kettle, and the insulating tape was removed after cleaning with deionized water, and then the conductive film sample was pl...

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Abstract

The invention especially relates to a preparation method for a metallic element-doped iron oxide nanorod catalyst with photoelectrocatalytic performance, which belongs to the technical field of catalysis. The preparation method comprises the following steps: preparing iron oxyhydroxide with a nanorod structure by using a solution thermosynthesis method; and calcining a sample in a certain atmosphere so as to obtain a metallic element-doped iron oxide nanorod with a same structure. An iron oxide doped nanostructure prepared by using a hydrothermal method has uniform morphology, shows absorption characteristics in a visible light zone and catalyzes photoelectrocatalysis of water under radiation of UV visible light. The solution thermosynthesis method enables the doping degree, morphology and size of a prepared sample to be controllable. The method is simple and easily practicable; and the prepared metallic element-doped iron oxide nanorod catalyst has good application potential in fields like photoelectrocatalysis and electrochemical catalysis.

Description

technical field [0001] The invention relates to catalyst preparation technology, in particular to a preparation method of an element-doped iron oxide nanorod catalyst with visible light absorption and photoelectric catalysis. Background technique [0002] In recent years, with the rapid development of nanotechnology, a lot of research has focused on nanostructured materials with good crystal form and morphology, excellent physical properties and chemical properties, and applied them in the field of catalysis. Compared with other materials, nanoparticles have the following advantages: (1) Nanoscale particles have a larger specific surface area, thereby increasing the contact between catalysts, reaction substances and solutions; (2) Nanoparticles can expose more active sites Points, thereby improving the catalytic efficiency of the catalyst; (3) The nanostructure can increase the density of photogenerated carriers in photocatalysis, thereby increasing the photoelectric convers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J23/745B01J35/02
Inventor 俞红梅付丽张长昆贾佳迟军邵志刚衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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