Preparation method of Cu-doped BiVO4 porous nano-tube photocatalyst

A photocatalyst and nanotube technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of easy control, good repeatability and high uniformity

Inactive Publication Date: 2018-01-19
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the synthesis of Cu-doped BiVO can simultaneously achieve low cost, easy control, and good reproducibility. 4 The preparation method of porous nanotube photocatalyst has not been reported

Method used

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  • Preparation method of Cu-doped BiVO4 porous nano-tube photocatalyst
  • Preparation method of Cu-doped BiVO4 porous nano-tube photocatalyst
  • Preparation method of Cu-doped BiVO4 porous nano-tube photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Using polymer polyacrylonitrile (PAN) as the reaction reagent, using N,N-dimethylformamide (DMF) as the solvent, stirring at room temperature for 8 to 10 hours, sucking the above-mentioned mixed solution into a 5mL syringe, Electrospinning was carried out in a certain electric field (positive electric field was 15KV, negative electric field was -2KV), the distance between positive and negative electrodes was 15cm, and the advancing speed was 0.3mL·h -1 , and the obtained one-dimensional PAN nanofiber precursor was collected and dried in an oven at 80°C for 12h.

[0024] For a Cu-doped BiVO prepared in this example 4 Porous nanotube photocatalyst is analyzed by field emission scanning electron microscope, and the obtained electron microscope pictures are as follows: figure 2 , it can be seen that the spun silk has uniform shape and size, with a diameter of 400nm to 450nm.

Embodiment 2

[0026] Weigh 194mg (0.4mmol) bismuth nitrate (Bi(NO 3 )3 ) and 46.8mg (0.4mmol) ammonium metavanadate (NH 4 VO 3 ), add 10ml of ethylene glycol and 30ml of ethanol, form a homogeneous solution by ultrasonic dispersion, then fully stir for 30 minutes, then weigh the above obtained 15mg of PAN into the solution, put the mixed solution into the reaction kettle, and heat it at 160°C for 24 hours , after naturally cooling to room temperature, open the reactor, wash and centrifuge with deionized water and absolute ethanol, and dry the precipitate. Next, one-dimensional PAN@BiVO was obtained by calcining the above in air 4 For nanocomposite fiber products, heat up to 500°C with a heating rate of 2°C·min -1 , keep warm for 2 hours, get BiVO 4 Porous nanotube sample, labeled BiVO 4 . The products prepared in this example were analyzed by X-ray diffraction and field emission scanning electron microscopy.

[0027] For a Cu-doped BiVO prepared in this example 4 The porous nanotube...

Embodiment 3

[0029] Weigh 194mg (0.4mmol) bismuth nitrate (Bi(NO 3 ) 3 ), 3mg (0.012mmol) copper sulfate (CuSO 4 ) and 46.8mg (0.4mmol) ammonium metavanadate (NH 4 VO 3 ), add 10ml of ethylene glycol and 30ml of ethanol, form a homogeneous solution by ultrasonic dispersion, then fully stir for 30 minutes, then weigh the above obtained 15mg of PAN into the solution, put the mixed solution into the reaction kettle, and heat it at 160°C for 24 hours , after naturally cooling to room temperature, open the reactor, wash and centrifuge with deionized water and absolute ethanol, and dry the precipitate. Next, one-dimensional PAN@Cu-doped BiVO was obtained by calcination in air 4 Nanocomposite fibers, heating up to 500°C, the heating rate is 2°C·min -1 , keep warm for 2 hours, get BiVO 4 Porous nanotube sample, designation Cu-BiVO4-3.0%. The products prepared in this example were analyzed by X-ray diffraction and field emission scanning electron microscopy.

[0030] For a Cu-doped BiVO pre...

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Abstract

The invention relates to a preparation method of a Cu-doped BiVO4 porous nano-tube photocatalyst, and aims to provide a preparation method of the Cu-doped BiVO4 porous nano-tube photocatalyst which has a simple synthetic process, is low in cost, is easy to control and is high in repeatability. The preparation method of the Cu-doped BiVO4 porous nano-tube photocatalyst disclosed by the invention comprises the following steps: bonding macromolecular polyacrylonitrile with a N,N-dimethylformamide solvent by adopting an electrostatic spinning method so as to form electrostatic spinning nano-fibers; by using the electrostatic spinning nano-fibers as a template, using ethylene glycol and ethanol as a mixed solvent and using bismuth nitrate, copper sulfate and ammonium metavanadate as reaction precursors, performing solvent thermal reaction to obtain a mixture; washing and drying the mixture; then performing calcination treatment on the mixture in the air to finally obtain the Cu-doped BiVO4porous nano-tube photocatalyst. The Cu-doped BiVO4 porous nano-tube photocatalyst prepared by the invention has the characteristics of low cost of a product, easiness for control, high uniformity, good repeatability and the like.

Description

technical field [0001] The present invention belongs to BiVO 4 Nanomaterial preparation technology and its photocatalytic water splitting field, specifically involving a Cu-doped BiVO 4 Preparation method of porous nanotube photocatalyst. Background technique [0002] Bismuth vanadate (BiVO 4 ) as a new type of photocatalyst, because of its narrow bandgap (about 2.4eV), can absorb more visible light, has good chemical and optical stability, and is non-toxic and pollution-free, making it a A hotspot in the field of visible light photocatalysis. Research reports that BiVO 4 There are many crystal forms, among which the monoclinic scheelite structure (ms-BiVO 4 ) photocatalytic performance was proved to be optimal, but due to the BiVO 4 The high recombination rate of photogenerated electrons and holes in photocatalytic materials leads to the decrease of its photocatalytic performance. Therefore, through the BiVO 4 Structural modification and doping modification to reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847B01J37/08B01J35/06C01B3/04B82Y30/00B82Y40/00
CPCY02E60/36
Inventor 胡勇何斌沈峻岭
Owner ZHEJIANG NORMAL UNIVERSITY
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