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Preparation method of V2O5/BiVO4 (vanadium pentoxide/bismuth vanadium oxide) nanorod composite photocatalyst

A technology of composite light and nanorods, applied in the field of environmental pollution control, can solve the problems of poor adsorption capacity and low photocatalysis, and achieve the effects of strong photoresponse, high catalytic activity, good application value and prospect

Inactive Publication Date: 2014-07-09
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to pure BiVO 4 Poor adsorption capacity, photogenerated electron-hole recombination and other disadvantages, so its photocatalytic activity is low

Method used

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  • Preparation method of V2O5/BiVO4 (vanadium pentoxide/bismuth vanadium oxide) nanorod composite photocatalyst
  • Preparation method of V2O5/BiVO4 (vanadium pentoxide/bismuth vanadium oxide) nanorod composite photocatalyst
  • Preparation method of V2O5/BiVO4 (vanadium pentoxide/bismuth vanadium oxide) nanorod composite photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Weigh 2.88mmol of sodium oleate and add it to 48mL of deionized water, then add 0.96mmol of Bi(NO 3 ) 3 ·5H 2 O was added to the sodium oleate solution while vigorously stirring for about 15 minutes. Then 0.96mmol Na 3 VO 4 12H 2 O was added to 48 mL of deionized water to form Na 3 VO 4 solution. Na 3 VO 4 The solution was added to the above solution, and after being vigorously stirred for 30 min, it was transferred to a 120 mL reaction kettle, and hydrothermally reacted at 100° C. for 12 h. Then the obtained sample was cooled to room temperature, the supernatant was extracted with acetone, the extracted sample was washed with cyclohexane and ethanol, and finally dried in a vacuum oven at 50°C for 8 hours, and the obtained light yellow sample was V 2 o 5 / BiVO 4 Nanorod composite photocatalysts.

Embodiment 2

[0037] According to the preparation method of the present invention of Example 1, the quality of sodium oleate is increased to 3.6mmol, dissolved in 60ml of deionized water, Bi(NO 3 ) 3 ·5H 2 O and Na 3 VO 4 12H 2 The quality of O is increased to 1.2mmol, and 1.2mmol Na 3 VO 4 12H 2 O was dissolved in 60ml of deionized water to prepare V 2 o 5 / BiVO 4 Nanorod composite photocatalysts.

Embodiment 3

[0039] According to the preparation method of the present invention in Example 1, the hydrothermal reaction temperature was changed to 80° C., and the reaction was carried out for 12 hours, followed by extraction, washing, separation and drying. get V 2 o 5 / BiVO 4 Nanorod composite photocatalysts.

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Abstract

The invention discloses a preparation method of a V2O5 / BiVO4 (vanadium pentoxide / bismuth vanadium oxide) nanorod composite photocatalyst, anf belongs to the technical field of pollution control. The method comprises the steps of preparing a sodium oleate solution and a Na3VO4 (sodium orthovanadate) solution firstly, adding Bi(NO3)3.5H2O (bismuth nitrate pentahydrate) into the sodium oleate solution while stirring violently, then adding the Na3VO4 solution into a mixed solution of Bi(NO3)3 and sodium oleate, transferring into a reaction still for hydrothermal reaction, cooling a sample, extracting liquid supernatant with acetone, separating, washing the sample with cyclohexane and ethyl alcohol, separating, and drying under a vacuum condition, so as to obtain the V2O5 / BiVO4 nanorod composite photocatalyst. The V2O5 / BiVO4 composite semiconductor photocatalyst has the strong visible light response and the high catalytic activity and has the good application value and application prospect in the field of degradation of organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and relates to a method for preparing an orthorhombic vanadium pentoxide / monoclinic bismuth vanadate composite catalyst, in particular to vanadium pentoxide / bismuth vanadate nanorods Preparation method and application of composite photocatalyst. Background technique [0002] Bismuth vanadate (BiVO 4 ) is a relatively cheap, stable and non-toxic pigment, because it has a series of special properties, such as special properties such as ferroelectricity, ferroelasticity and acoustic optical rotation. Since 1998, Kudo (Kudo A, Ueda K, Kato H, et al.Catalysis Letters; 1998,53:229-230) first reported BiVO 4 It has the ability to photolyze water under visible light, which has aroused people's research interest in the direction of photocatalysis. Bismuth vanadate (BiVO 4 ) mainly has four crystal forms: (1) monoclinic scheelite crystal (s-m); (2) tetragonal zirconium silicate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B82Y40/00B82Y30/00A62D3/17A62D101/20
Inventor 李新勇孙娟娟肇启东石勇柯军
Owner DALIAN UNIV OF TECH
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