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Heterojunction material formed by supporting single-layer Bi2WO6 nanosheet on g-C3N4 (Graphite-phase C3N4) nanosheet as well as preparation method and application of heterojunction material

A technology of graphite phase carbon nitride and nanosheets, which is applied in chemical instruments and methods, chemical/physical processes, special compound water treatment, etc., can solve the problems of slow electron transfer rate in semiconductors, and achieve electron transfer and degradation efficiency High and improved photocatalytic activity

Active Publication Date: 2017-05-31
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Blocky g-C in recent years 3 N 4 -Bi 2 WO 6 , g-C 3 N 4 -BiVO 4 Compound semiconductors with heterostructures have emerged one after another, which effectively improved the photocatalytic activity of semiconductors, but the electron transfer rate of the above semiconductors is relatively slow.

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  • Heterojunction material formed by supporting single-layer Bi2WO6 nanosheet on g-C3N4 (Graphite-phase C3N4) nanosheet as well as preparation method and application of heterojunction material
  • Heterojunction material formed by supporting single-layer Bi2WO6 nanosheet on g-C3N4 (Graphite-phase C3N4) nanosheet as well as preparation method and application of heterojunction material
  • Heterojunction material formed by supporting single-layer Bi2WO6 nanosheet on g-C3N4 (Graphite-phase C3N4) nanosheet as well as preparation method and application of heterojunction material

Examples

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Embodiment 1

[0041] A g-C of the present invention 3 N 4 Nanosheet-supported monolayer Bi 2 WO 6 Nanosheet heterojunction materials, g-C 3 N 4 Nanosheet as carrier, g-C 3 N 4 Nanosheets are decorated with a single layer of Bi 2 WO 6 Nanosheets, monolayer Bi 2 WO 6 Nanosheets grown on g-C 3 N 4 nanosheet surface. g-C above 3 N 4 Nanosheet-supported monolayer Bi 2 WO 6 The nanosheet heterojunction material has a hierarchical sheet structure.

[0042] where g-C 3 N 4 Nanosheets and monolayer Bi 2 WO 6 The mass ratio of nanosheets is 0.5:1.

[0043] The above-mentioned g-C of the present embodiment 3 N 4 Nanosheet-supported monolayer Bi 2 WO 6 A method for preparing a nanosheet heterojunction material, comprising the following steps:

[0044] (1) Weigh 10.0g of melamine into a semi-closed alumina crucible, move it into a muffle furnace, raise the temperature to 520°C at a heating rate of 5°C / min, and roast for 2 hours; Rise to 550°C under the condition of 1 / min, roas...

Embodiment 2

[0062] A g-C of the present invention 3 N 4 Nanosheet-supported monolayer Bi 2 WO 6 The application of nanosheet heterojunction material (UTCB-50) in the treatment of antibiotic wastewater includes the following steps:

[0063] (1) Weigh 100 mg of g-C prepared in Example 1 3 N 4 Nanosheet-supported monolayer Bi 2 WO 6 The nanosheet heterojunction material was added to ibuprofen wastewater with a volume of 100mL and an initial concentration of 10mg / L in a light-proof environment to obtain a mixed solution, which was placed in a photocatalytic reaction device after adsorption for 0.5h.

[0064] (2) Use a 500W xenon lamp for photocatalytic reaction with a light intensity of 1.39mw / cm 2 . Measure the concentration C of ibuprofen of the reaction solution at the 226nm wavelength place of the liquid chromatography ultraviolet detector at the moment t, according to the formula D=(C 0 –C) / C 0 ×100% to calculate the removal rate D of ibuprofen, where C 0 is the initial concen...

Embodiment 3

[0068] A g-C of the present invention 3 N 4 Nanosheet-supported monolayer Bi 2 WO 6The application of nanosheet heterojunction material (UTCB-50) in the treatment of antibiotic wastewater includes the following steps:

[0069] (1) Prepare three groups of 100 mL ibuprofen solutions, respectively adjust the initial concentration of ibuprofen in the solution to 10 mg / L, 15 mg / L, and 20 mg / L, add 0.01 g of UTCB-50 from Example 1, and absorb 0.5 h and then placed in the photocatalytic reaction device.

[0070] (2) Use a 500W xenon lamp for photocatalytic reaction with a light intensity of 1.39mw / cm 2 . Measure the concentration C of ibuprofen of the reaction solution at the 226nm wavelength place of the liquid chromatography ultraviolet detector at the moment t, according to the formula D=(C 0 –C) / C 0 ×100% to calculate the removal rate D of ibuprofen, where C 0 is the initial concentration of ibuprofen. g-C of the present invention 3 N 4 Nanosheet-supported monolayer Bi...

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Abstract

The invention discloses a heterojunction material formed by supporting a single-layer Bi2WO6 nanosheet on a g-C3N4 (Graphite-phase C3N4) nanosheet as well as a preparation method and an application of the heterojunction material. Adopting the single-layer Bi2WO6 nanosheet modified g-C3N4 nanosheet as a supporter, the heterojunction material is of a hierarchical sheet structure. The preparation method of the heterojunction material comprises the steps of adding the g-C3N4 nanosheet and cetyl trimethyl ammonium bromide to a Bi(NO3)3.5H2O solution, then adding a Na2WO4.2H2O solution, and performing a hydrothermal reaction on the obtained mixed solution to obtain the heterojunction material. The heterojunction material has the advantages of being high in photocatalytic activity, stable, recyclable and the like, and the preparation method of the heterojunction material has the advantages that operation is simple and convenient, raw material cost is low, energy consumption is low and the like. The heterojunction material can be used for degrading antibiotics in wastewater and has the advantages that the degradation effect is good, the application method is simple and easy to operate and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a single-layer bismuth tungstate nanosheet heterojunction material supported by graphite phase carbon nitride nanosheets and a preparation method and application thereof. Background technique [0002] With the development of nanomaterial technology, semiconductor photocatalysis technology has broad development prospects in the technology of treating organic or inorganic pollutants in the environment. In particular, the development of ultra-thin two-dimensional semiconductor photocatalytic materials responsive to visible light has further promoted the application of semiconductor photocatalytic technology in the field of environmental restoration. [0003] Bi-based oxides are widely used in visible light catalytic hydrogen production and removal of environmental pollutants due to their unique layered structure, controllable microscopic morphology and good ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30
CPCC02F1/30B01J27/24C02F2305/10B01J35/40B01J35/39
Inventor 汤琳王佳佳邓垚成曾光明刘雅妮彭博朱超陈慧
Owner HUNAN UNIV
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