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Preparation method of La2O3 nanofiber catalyst

A nanofiber and composite nanofiber technology, which is applied in the field of catalyst preparation, can solve the problems of small specific surface area limiting catalytic efficiency and large particle size, and achieve the effects of easy operation, easy recycling and high catalytic activity

Inactive Publication Date: 2012-10-17
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

La currently used for catalytic reactions 2 o 3 The material is usually in the form of powder particles, the particle size is large, and the specific surface area is small, which limits its catalytic efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034]1. Preparation of electrospinning solution: with 7.5g polyvinyl alcohol (polymerization degree 1788), 4.5g La(NO 3 ) 3 Mixed with 67.5mL distilled water, and stirred at 70°C for a period of time to form a uniform electrospinning solution.

[0035] 2. Through the electrospinning equipment, under the voltage of 65KV, the distance between the spinneret and the receiving device of 18cm, the feed flow rate of the electrospinning solution 1mL / 1h, and the electrospinning temperature of 50°C, the electrospinning solution was used to prepare PVA / La( NO 3 ) 3 Composite nanofiber precursors.

[0036] 3. The prepared PVA / La(NO 3 ) 3 The composite nanofiber precursor was dried in a vacuum oven (vacuum degree 0.03MPa, temperature 70°C) for 8h.

[0037] 4. PVA / La(NO 3 ) 3 The composite nanofiber precursor was calcined in a muffle furnace at 800 °C for 7 h. Prepared La with a diameter ranging from 100 to 300 nm 2 o 3 Nanofibers. Lamellar filaments appear on the fibers, and t...

example 2

[0039] 1. Preparation of electrospinning solution: with 7.5g polyvinyl alcohol (polymerization degree 1799), 4.5g La(NO 3 ) 3 Mixed with 67.5mL distilled water, and stirred at 70°C for a period of time to form a uniform electrospinning solution.

[0040] 2. Through the electrospinning equipment, under the voltage of 60KV, the distance between the spinneret and the receiving device of 18cm, the feed flow rate of the electrospinning solution 1mL / 1h, and the electrospinning temperature of 50°C, the electrospinning solution was used to prepare PVA / La ( NO 3 ) 3 Composite nanofiber precursors.

[0041] 3. The prepared PVA / La(NO 3 ) 3 The composite nanofiber precursor was dried in a vacuum oven (vacuum degree 0.03MPa, temperature 70°C) for 8h.

[0042] 4. PVA / La(NO 3 ) 3 The composite nanofiber precursor was calcined in a muffle furnace at 800 °C for 7 h. Prepared La with a diameter ranging from 100 to 300 nm 2 o 3 Nanofibers. Lamellar filaments appear on the fibers, and...

example 3

[0044] 1. Preparation of electrospinning solution: with 7.5g polyvinyl alcohol (polymerization degree 1788), 4.5g LaCl 3 Mixed with 67.5mL distilled water, and stirred at 80°C for a period of time to form a uniform electrospinning solution.

[0045] 2. Through the electrospinning equipment, under the voltage of 65KV, the distance between the spinneret and the receiving device of 18cm, the feeding flow rate of the electrospinning solution is 1mL / 1h, and the electrospinning temperature is 50°C, the electrospinning solution is used to prepare PVA / LaCl 3 Composite nanofiber precursors.

[0046] 3. The prepared PVA / LaCl 3 The composite nanofiber precursor was dried in a vacuum oven (vacuum degree 0.03MPa, temperature 70°C) for 8h.

[0047] 4. PVA / LaCl after drying 3 The composite nanofiber precursor was calcined in a muffle furnace at 1150°C for 6h. Prepared La with a diameter in the range of 100-350nm 2 o 3 Nanofibers. Lamellar filaments appear on the fibers, and there are ...

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Abstract

The invention discloses a preparation method of a La2O3 nanofiber catalyst, which sequentially comprises the following steps: preparing an electrostatic spinning solution : under the stirring conditions, evenly stirring La salt and spinnable polymer resin into an even polar solvent, mixing and stirring the La salt and the spinnable polymer resin to prepare an even electrostatic spinning solution,and preparing a composite nanofiber precursor of the spinnable polymer resin and the La salt; allowing the electrostatic spinning solution to be prepared into the composite nanofiber precursor of thespinnable polymer resin and the La salt by an electrostatic spinning device under the high pressure electrostatic action; drying the composite nanofiber precursor of the spinnable polymer resin and the La salt; and calcining the dried composite nanofiber precursor of the spinnable polymer resin and the La salt in a muffle furnace to form lanthanum oxide nanofibers with the diameter of 100-1300nm.The fiber is in a lamellar shape, and has strong absorption performance to carbon dioxide and good catalytic degradation effect of organophosphorus pesticides under the illumination of mercury lamps.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a lanthanum oxide nanofiber catalyst dedicated to the decomposition of chlorinated hydrocarbons, the oxidation coupling of methane, the degradation of pesticides, and sensing performance. Background technique [0002] With the development of society, there is an increasing demand for lubricants, heat transfer fluids, plasticizers, detergents, etc., but their use is limited due to the presence of chlorinated hydrocarbons (CHCs). In the strategy of sustainable development, the commodity industrialized chlorinated hydrocarbons are slowly replaced by environmentally friendly products, but the high price of the substitute products and the lack of suitable substitutes to replace the chlorinated hydrocarbons have always been difficult. Less than a good solution. At present, the main chlorine-containing wastes include C1 chlorinated hydrocarbons and C2 chlorina...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10B01J35/06B01J35/10A62D3/10A62D101/04A62D101/26
Inventor 陈庆华陈育明钱庆荣刘欣萍黄宝铨肖荔人许兢
Owner FUJIAN NORMAL UNIV