Floating type BiVO4/floating bead composite photocatalyst and preparation method and application thereof

A catalyst and floating technology, applied in the field of visible light catalysts, can solve the problems of difficult separation and recovery, waste of resources, etc., and achieve the effects of being easy to accept light, improving efficiency, and being easy to implement.

Inactive Publication Date: 2013-01-09
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, BiVO involved in photocatalytic research 4 Most of them are ultrafine powde...

Method used

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  • Floating type BiVO4/floating bead composite photocatalyst and preparation method and application thereof
  • Floating type BiVO4/floating bead composite photocatalyst and preparation method and application thereof
  • Floating type BiVO4/floating bead composite photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Pretreatment of floating beads: add fly ash floating beads to 10% nitric acid solution, ultrasonically clean at room temperature for 1 hour, filter, and dry at 120°C;

[0025] 2) Add the silane coupling agent KH550 into the mixed solvent of ethanol and ultrapure water, the volume ratio of the coupling agent to the mixed solvent is 1:100, stir and hydrolyze at room temperature, then add the floating beads obtained in step 1), and stir to react 8h, filter out the floating beads, wash them alternately with ethanol and ultrapure water, and dry them in a drying oven at 120°C;

[0026] 3) Weigh 4.85g of bismuth nitrate pentahydrate and dissolve it in 40mL of glacial acetic acid, then add 0.2g of polyethylene glycol 10000, stir to fully dissolve to obtain solution A; quickly pipette 2.35mL of isopropoxy vanadium oxide, dropwise Add to 20mL acetylacetone, stir vigorously to obtain solution B. Slowly add solution B to solution A with a syringe, and stir for 1 hour to obtain ...

Embodiment 2

[0035] 1) Pretreatment of floating beads: add fly ash floating beads to 10% nitric acid solution, ultrasonically clean at room temperature for 2 hours, filter, and dry at 120°C;

[0036] 2) Add the silane coupling agent KH550 into the mixed solvent of ethanol and ultrapure water, the volume ratio of the coupling agent to the mixed solvent is 1:200, stir and hydrolyze at room temperature, then add the floating beads obtained in step 1), and stir to react 6h, filter out the floating beads, wash them alternately with ethanol and ultrapure water, and dry them in a drying oven at 120°C;

[0037] 3) Weigh 4.85g of bismuth nitrate pentahydrate and dissolve it in 40mL of glacial acetic acid, then add 0.15g of polyethylene glycol 10000, stir to fully dissolve to obtain solution A; quickly pipette 2.35mL of isopropoxyvanadium oxide, dropwise Add to 20mL acetylacetone, stir vigorously to obtain solution B. Slowly add solution B to solution A with a syringe, and stir for 1 hour to obtain...

Embodiment 3

[0043] 1) Pretreatment of floating beads: add fly ash floating beads to 10% nitric acid solution, ultrasonically clean at room temperature for 2 hours, filter, and dry at 120°C;

[0044] 2) Add the silane coupling agent KH550 into the mixed solvent of ethanol and ultrapure water, the volume ratio of the coupling agent to the mixed solvent is 1:150, stir and hydrolyze at room temperature, then add the floating beads obtained in step 1), and stir to react 8h, filter out the floating beads, wash them alternately with ethanol and ultrapure water, and dry them in a drying oven at 120°C;

[0045] 3) Weigh 2.43g of bismuth nitrate pentahydrate and dissolve it in 20mL of glacial acetic acid, then add 0.15g of polyethylene glycol 10000, stir to fully dissolve to obtain solution A; quickly pipette 1.20mL of isopropoxyvanadium oxide, drop by drop Added into 12mL acetylacetone, stirred vigorously to obtain solution B. Slowly add solution B to solution A with a syringe, and stir for 1 hou...

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Abstract

The invention discloses a floating type BiVO4/floating bead composite photocatalyst and a preparation method and application thereof. According to the floating type BiVO4/floating bead composite photocatalyst, floating beads are used as a carrier, and BiVO4 granular films are loaded on surfaces of the floating beads. The preparation method comprises the following steps of: mixing an acetylacetone solution of isopropoxy vanadium oxide and a glacial acetic acid solution of bismuth nitrate at room temperature, and stirring vigorously to form black green sol; and adding coal ash floating beads for stirring, loading, immersing, evaporating to dryness in water bath, and calcining to obtain the floating type BiVO4/floating bead composite photocatalyst. Tests indicate that the floating type BiVO4/floating bead composite photocatalyst can absorb visible light within the range of wavelength of between 200 and 550 nanometers, and is a visible light responded photocatalyst; and compared with the common TiO2 photocatalyst, the floating type BiVO4/floating bead composite photocatalyst has the advantage that the BiVO4/floating beads can improve the utilization rate of solar energy. In addition, compared with TiO2/floating beads, the BiVO4/floating beads can improve the degradation efficiency of methylthionine chloride obviously under the visible light.

Description

[0001] technical field [0002] The present invention relates to a kind of visible light catalyst, especially a kind of floating type BiVO 4 The composite photocatalyst / floating bead and its preparation method, the present invention also relates to the degradation performance of the catalyst to methylene blue under the irradiation of visible light. Background technique [0003] With the development of society and economy, people pay more and more attention to energy and ecological environment. Solving the problems of energy shortage and environmental pollution is an urgent need to achieve sustainable development, improve people's quality of life and ensure national security. Compared with traditional methods of environmental control, semiconductor photocatalysis has the advantages of strong oxidation, complete mineralization of pollutants, low cost, high efficiency, and no secondary pollution. Photocatalysis has important application prospects in solving energy and environm...

Claims

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Application Information

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IPC IPC(8): B01J23/22C02F1/30
Inventor 张进李琴崔皓李闯安浩
Owner NANJING UNIV
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