Bismuth vanadate composite photo-catalyst co-modified by silver and phosphorous-modified graphite-phase carbon nitride nano-sheets, and preparation method and application of same

A graphite-phase carbon nitride and nanosheet technology, which is applied in the fields of physical/chemical process catalysts, chemical instruments and methods, and water treatment of special compounds, can solve the problems of ineffective photocatalytic processes, consumption of photogenerated electrons and holes, and high Problems such as electrons and holes can be achieved to improve the photocatalytic effect, increase the specific surface area, and improve the absorption capacity

Active Publication Date: 2017-07-14
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because pure bismuth vanadate materials generally have a high recombination rate of photogenerated electrons and holes, most of the photogenerated electrons and holes converted from light energy are consumed inside the catalyst and cannot function. for efficient photocatalytic processes

Method used

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  • Bismuth vanadate composite photo-catalyst co-modified by silver and phosphorous-modified graphite-phase carbon nitride nano-sheets, and preparation method and application of same
  • Bismuth vanadate composite photo-catalyst co-modified by silver and phosphorous-modified graphite-phase carbon nitride nano-sheets, and preparation method and application of same
  • Bismuth vanadate composite photo-catalyst co-modified by silver and phosphorous-modified graphite-phase carbon nitride nano-sheets, and preparation method and application of same

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Experimental program
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Effect test

Embodiment 1

[0044] A bismuth vanadate composite photocatalyst co-modified with silver and phosphorus-hybridized graphite phase carbon nitride nanosheets, including bismuth vanadate particles, and the bismuth vanadate particles are modified to form vanadic acid on the surface of phosphorus-hybridized graphite phase carbon nitride nanosheets The bismuth-supported phosphorus hybrid graphite phase carbon nitride nanosheet composite material, and the phosphorus hybrid graphite phase carbon nitride nanosheet composite material supported by bismuth vanadate are modified with simple silver on the surface.

[0045] In this embodiment, the elemental silver and bismuth vanadate particles can be uniformly dispersed on the surface of the phosphorus-hybridized graphite-phase carbon nitride nanosheets.

[0046] In this example, bismuth vanadate particles are modified on the surface of phosphorus hybrid graphite phase carbon nitride nanosheets by hydrothermal reaction method to form bismuth vanadate loade...

Embodiment 2

[0062] A bismuth vanadate composite photocatalyst (Ag@PCNS / BiVO 4 ) application in the treatment of antibiotic wastewater, comprising the following steps:

[0063] (1) Weigh 100 mg bismuth vanadate composite photocatalyst (Ag@PCNS / BiVO 4 ), added to 100 ml of ciprofloxacin wastewater with an initial concentration of 10 mg / L in a dark environment, and placed in a photocatalytic reaction device after adsorption for 30 min.

[0064] (2) Using a 300W xenon lamp as the light source, the photocatalytic reaction was carried out in the visible light region (420 nm<λ<760 nm) for 120 minutes to complete the treatment of ciprofloxacin wastewater.

[0065] Measure the absorbance value of the reaction solution at a wavelength of 277nm when the light time is 0, 20min, 40min, 60min, 80min, 100min, and 120min, and combine the standard curve to obtain the corresponding ciprofloxacin concentration C of different light time, according to the formula (D =(C 0 -C) / C 0 ×100%, where C 0 For the...

Embodiment 3

[0069] A bismuth vanadate composite photocatalyst (Ag@PCNS / BiVO 4 ) application in the treatment of antibiotic wastewater, comprising the following steps:

[0070] (1) Weigh 100 mg bismuth vanadate composite photocatalyst (Ag@PCNS / BiVO 4 ), added to 100 ml of ciprofloxacin wastewater with an initial concentration of 10 mg / L in a dark environment, and placed in a photocatalytic reaction device after adsorption for 30 min.

[0071] (2) Using a 300W xenon lamp as the light source, the photocatalytic reaction was carried out in the near-infrared region (λ>760 nm) for 120 minutes to complete the treatment of ciprofloxacin wastewater.

[0072] Measure the absorbance value of the reaction solution at a wavelength of 277nm when the illumination time is 0, 20min, 40min, 60min, 80min, 100min, and 120min, and combine the standard curve to obtain the concentration C of ciprofloxacin corresponding to different illumination times, according to the formula ( D=(C 0 -C) / C 0 ×100%, where C...

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Abstract

The invention discloses a bismuth vanadate composite photo-catalyst co-modified by silver and phosphorous-modified graphite-phase carbon nitride nano-sheets, and a preparation method and an application of same. The composite photo-catalyst includes bismuth vanadate particle, which modifies the surface of phosphorous-modified graphite-phase carbon nitride nano-sheets to form PCNS / BiVO4, and elementary silver modifies the surface of the PCNS / BiVO4. The preparation method includes the steps of: preparing a suspension liquid, preparing the PCNS / BiVO4, and supporting the silver. The composite photo-catalyst has high photo-catalysis activity and good stability. The preparation method is simple in operation and processes and is low in cost. The composite photo-catalyst can be used for treating antibiotics wastewater and has simple application method, low cost, high removal rate on antibiotics, stable photo-catalysis performance, good repeatability, etc.

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 co-modified with silver and phosphorous hybrid graphite phase carbon nitride nanosheets, and a preparation method and application thereof. Background technique [0002] In recent years, human society has developed rapidly, and human living standards have also been greatly improved. However, the ensuing environmental problems are becoming more and more serious, and the traditional environmental restoration technology has been difficult to meet the needs of society. Therefore, seeking an energy-saving and efficient environmental treatment and restoration technology has received extensive attention and research at home and abroad. In the past ten years, photocatalytic technology has developed rapidly, and the scope of research has been continuously expanded. And thanks to the full development of nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/38C02F101/36C02F101/34
CPCB01J27/24B01J35/004C02F1/30C02F2101/34C02F2101/36C02F2101/38C02F2305/10
Inventor 汤琳邓垚成王佳佳曾光明冯程洋刘雅妮冯浩朋王敬敬
Owner HUNAN UNIV
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