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Niobium hydroxide visible-light-driven photocatalyst having wide-spectral catalytic performance and grafting with aromatic alcohol on surface, and preparation and application thereof

A technology of niobium hydroxide and catalytic performance, applied in the field of photocatalyst synthesis, can solve problems such as preparation methods that have not yet been reported, and achieve the effects of easy regulation of light absorption properties, easy regulation of photocatalytic activity, and excellent charge transfer ability.

Inactive Publication Date: 2017-04-26
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain a visible light catalyst with excellent light absorption and oxidation performance, the amorphous niobium hydroxide Nb(OH) was first prepared by hydrolysis reaction using niobium pentachloride as the niobium source 5 , and then using aromatic alcohols as organic solvents, through condensation reaction under solvothermal conditions, Nb(OH) grafted with aromatic alcohols on the surface 5 , this visible light catalyst of the present invention and its preparation method have not yet been reported

Method used

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  • Niobium hydroxide visible-light-driven photocatalyst having wide-spectral catalytic performance and grafting with aromatic alcohol on surface, and preparation and application thereof
  • Niobium hydroxide visible-light-driven photocatalyst having wide-spectral catalytic performance and grafting with aromatic alcohol on surface, and preparation and application thereof
  • Niobium hydroxide visible-light-driven photocatalyst having wide-spectral catalytic performance and grafting with aromatic alcohol on surface, and preparation and application thereof

Examples

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Effect test

Embodiment 1

[0030] A method for preparing a niobium hydroxide visible light catalyst grafted with aryl alcohol on the surface with broad-spectrum catalytic performance, comprising the following steps:

[0031] Add 2 g of NbCl to 100 mL of deionized water 5 , the resulting mixture was placed in a 130°C oil bath with a condensing reflux device to react for 6 hours. After the reaction, the solid obtained was centrifuged, washed with distilled water three times, and dried at 60°C to obtain white Nb(OH) 5 powder; then the obtained 1.5g of niobium hydroxide was added to 80mL of benzyl alcohol BA, and ultrasonically dispersed for 30 minutes, and the resulting mixed suspension was transferred to a stainless steel reactor with a polytetrafluoroethylene liner, and after sealing Place in a drying oven at 150°C for solvent heat treatment for 12 hours; after cooling the reactor at room temperature, centrifuge the resulting precipitate, wash with n-hexane and acetone three times respectively, and dry a...

Embodiment 2

[0047] A method for preparing a niobium hydroxide visible light catalyst grafted with aryl alcohol on the surface with broad-spectrum catalytic performance, comprising the following steps:

[0048] Add 1 g of NbCl to 100 mL of deionized water 5 , the resulting mixed solution was placed in a 150°C oil bath with a condensing reflux device to react for 3 hours. After the reaction, the solid obtained was centrifuged, washed with distilled water for 3 times, and dried at 60°C to obtain a white niobium hydroxide powder; then 2.4g of niobium hydroxide was added into 60mL of 4-methoxybenzyl alcohol MBA, and ultrasonically dispersed for 30 minutes, and the resulting mixed suspension was transferred to a stainless steel reactor with a polytetrafluoroethylene liner, sealed and placed Solvent heat treatment was carried out in a drying oven at 120°C for 24 hours; after the reaction kettle was cooled at room temperature, the obtained precipitate was centrifuged, washed three times with n-he...

Embodiment 3

[0051] A method for preparing a niobium hydroxide visible light catalyst grafted with aryl alcohol on the surface with broad-spectrum catalytic performance, comprising the following steps:

[0052] Add 3 g of NbCl to 100 mL of deionized water 5 , the resulting mixture was placed in a 110°C oil bath with a condensing reflux device to react for 9 hours. After the reaction, the resulting solid was centrifuged, washed with distilled water three times, and dried at 60°C to obtain a white niobium hydroxide powder; then Add 0.5g of the prepared niobium hydroxide into 50mL of 1-phenylethyl alcohol 1-PEA, ultrasonically disperse for 30 minutes, transfer the resulting mixed suspension to a stainless steel reactor with a polytetrafluoroethylene liner, seal it and place it in a dry place Solvent heat treatment was carried out at 180°C in the box for 8 hours; after the reaction kettle was cooled at room temperature, the obtained precipitate was centrifuged, washed three times with n-hexane...

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Abstract

The invention belongs to the technical field of photocatalyst synthesis, and concretely relates to a niobium hydroxide visible-light-driven photocatalyst having a wide-spectral catalytic performance and grafting with aromatic alcohol on the surface, and preparation and application thereof. A preparation method of the niobium hydroxide visible-light-driven photocatalyst comprises the steps of adopting columbium pentachloride as a niobium source, and hydrolyzing the columbium pentachloride at a certain temperature so as to firstly prepare niobium hydroxide; then adopting the aromatic alcohol as an organic solvent, and carrying out condensation reaction on the niobium hydroxide and aromatic alcohol molecules under a solvent thermal condition; and centrifugally separating, washing and drying an obtained solid substance so as to obtain the niobium hydroxide grafting with the aromatic alcohol on the surface. The niobium hydroxide grafting with the aromatic alcohol on the surface prepared by the invention is yellow powder, can effectively absorb visible light, and degrades pollutant rhodamine B, methyl orange and phenol under the visible light radiation; and reactions such as preparation of benzaldehyde through selective oxidation of phenylcarbinol, reduction of heavy metal ion hexavalent chromium Cr (VI), and reductive dechlorination of chlorophenol pollutants show that the niobium hydroxide grafting with the aromatic alcohol on the surface has better catalytic activity, is non-toxic, high-efficient, not easy to inactivate, and wide in application range, and has a favorable application prospect in the photocatalysis field.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst synthesis, and in particular relates to a niobium hydroxide visible light catalyst grafted with aromatic alcohol on the surface with broad-spectrum catalytic performance and its preparation and application. Background technique [0002] Semiconductor photocatalysis technology is a new type of environmental treatment technology. It uses solar energy as a driving force to generate electron-hole pairs, and uses holes with strong oxidizing ability to completely decompose refractory pollutants, or use photogenerated electrons to reduce To remove toxic heavy metal ions in wastewater, and most semiconductor photocatalysts have stable chemical properties and will not produce new pollution during use. The development of semiconductor photocatalysis technology provides an effective way for advanced treatment of environmental pollution (M.R.Hoffmann, et al .Environmental applications of semiconductor p...

Claims

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Application Information

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IPC IPC(8): B01J31/36C02F1/30C02F1/70C02F1/72
CPCC02F1/30C02F1/70C02F1/725B01J31/36C02F2101/22C02F2101/308C02F2101/36C02F2101/34C02F2101/345C02F2305/10B01J35/39Y02W10/37
Inventor 杨娟戴俊李瑶游军
Owner HENAN POLYTECHNIC UNIV
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