Bismuth vanadate composite photocatalyst jointly loaded by cuprous oxide and sliver and preparation method and application thereof

A cuprous oxide, bismuth vanadate technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of poor photo-generated electron and hole transfer and separation The ability of the bismuth vanadate material to achieve the photocatalytic effect, the degree of response is not ideal, etc., to achieve the effect of being beneficial to the contact, improving the photocatalytic ability, and improving the light absorption ability

Active Publication Date: 2017-06-23
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its response in the visible light region is still not ideal, and because pure bismuth vanadate materials have poor photogenerated electron and hole transport and separation capabilities, the single bismuth vanadate material cannot achieve the desired very high photocatalytic effect

Method used

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  • Bismuth vanadate composite photocatalyst jointly loaded by cuprous oxide and sliver and preparation method and application thereof
  • Bismuth vanadate composite photocatalyst jointly loaded by cuprous oxide and sliver and preparation method and application thereof
  • Bismuth vanadate composite photocatalyst jointly loaded by cuprous oxide and sliver and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A bismuth vanadate composite photocatalyst supported by cuprous oxide and silver, the bismuth vanadate composite photocatalyst supported by cuprous oxide and silver uses bismuth vanadate particles as the carrier, and the surface of the bismuth vanadate particles is modified with cuprous oxide The particles form a cuprous oxide-supported bismuth vanadate composite material, and the surface of the cuprous oxide-supported bismuth vanadate composite material is modified with silver nanoparticles.

[0043] In this embodiment, the cuprous oxide particles grow in situ and adhere to the surface of the bismuth vanadate particles by heating reaction, wherein the mass ratio of the bismuth vanadate particles to the cuprous oxide particles is 1:0.03, and the bismuth vanadate particles are nanoparticles.

[0044] In this example, silver nanoparticles are attached to the surface of the bismuth vanadate composite material supported by cuprous oxide by photoreduction, wherein the mass r...

Embodiment 2

[0054] A bismuth vanadate composite photocatalyst supported by cuprous oxide and silver (Ag@Cu 2 O@BiVO 4 ) application in the treatment of antibiotic wastewater, comprising the following steps:

[0055] (1) Weigh 40 mg of the bismuth vanadate composite photocatalyst (Ag@Cu 2 O@BiVO 4 ), added to 100 mL of tetracycline hydrochloride wastewater with an initial concentration of 20 mg / L in a dark environment, and placed in a photocatalytic reaction device for photocatalytic reaction after adsorption for 30 minutes.

[0056](2) Using a 300W xenon lamp as the light source, the photocatalytic reaction was carried out in the visible light region for 60 minutes to complete the treatment of antibiotic wastewater.

[0057] Measure the absorbance value of the reaction solution at the wavelength of 357 nm when the illumination time is 0, 10min, 20min, 30min, 40min, 50min, and 60min, and combine the standard curve to obtain the tetracycline hydrochloride concentration C corresponding to...

Embodiment 3

[0061] Bismuth vanadate composite photocatalyst supported by cuprous oxide and silver (Ag@Cu 2 O@BiVO 4 ) application in the treatment of antibiotic wastewater, comprising the following steps:

[0062] (1) Weigh 40 mg of the bismuth vanadate composite photocatalyst (Ag@Cu 2 O@BiVO 4 ), added to 100 mL of tetracycline hydrochloride wastewater with an initial concentration of 20 mg / L in a dark environment, and placed in a photocatalytic reaction device for photocatalytic reaction after adsorption for 30 minutes.

[0063] (2) Using a 300W xenon lamp as the light source, the photocatalytic reaction was carried out in the visible light region for 60 minutes to complete the treatment of antibiotic wastewater.

[0064] The total organic carbon (TOC) in the reaction solution was measured when the light time was 0min, 15min, 30min, 45min, and 60min, so as to evaluate the ability of the prepared composite photocatalyst to completely mineralize antibiotic pollutants. The results are a...

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Abstract

The invention discloses a bismuth vanadate composite photocatalyst jointly loaded by cuprous oxide and sliver and a preparation method and application thereof. The composite photocatalyst takes bismuth vanadate particles as carriers, cuprous oxide particles are modified on the surfaces of the bismuth vanadate particles to form a cuprous oxide loaded bismuth vanadate composite material, and sliver nano-particles are modified on the surface of the cuprous oxide loaded bismuth vanadate composite material. The preparation method comprises the following steps: preparing the mixture of the bismuth vanadate and copper acetate, preparing the cuprous oxide loaded bismuth vanadate composite material, and carrying out silver loading. The composite photocatalyst has the advantages of high photocatalytic activity and good stability. The preparation method of the bismuth vanadate composite photocatalyst has the advantages of simple preparation process, convenience in operation, low cost and the like. The composite photocatalyst can be used for processing antibiotic waste water and has the advantages of simple application process, high photocatalytic efficiency, high final mineralization degree for antibiotics, good photocatalysis stability, good reutilization performance and the like.

Description

technical field [0001] The invention belongs to the technical field of functional composite photocatalysts, and in particular relates to a bismuth vanadate composite photocatalyst loaded with cuprous oxide and silver, and a preparation method and application thereof. Background technique [0002] With the development of human society and the massive consumption of fossil energy, human environmental problems are becoming more and more serious, and various pollution incidents occur frequently, which pose serious challenges to human normal life. At present, the traditional environmental restoration technology has been difficult to meet the needs of the society to a large extent, so it is urgent to find an efficient, energy-saving and environment-friendly restoration technology. In recent years, due to the vigorous development of photocatalytic technology, especially the rapid development of nanotechnology and nanotechnology based on nanomaterials, the application of photocataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C02F1/30C02F101/38
CPCB01J23/898B01J35/004B01J35/0073C02F1/30C02F2101/38C02F2305/10
Inventor 汤琳邓垚成王佳佳曾光明冯程洋冯浩朋刘雅妮彭博
Owner HUNAN UNIV
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