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Graphite-phase carbon nitride nanosheet-supported single-layer bismuth tungstate nanosheet heterojunction material and its preparation method and application

A graphitic carbon nitride and nanosheet technology, applied in chemical instruments and methods, chemical/physical processes, special compound water treatment, etc. High activity and tight connection effect

Active Publication Date: 2019-05-21
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.

Method used

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  • Graphite-phase carbon nitride nanosheet-supported single-layer bismuth tungstate nanosheet heterojunction material and its preparation method and application
  • Graphite-phase carbon nitride nanosheet-supported single-layer bismuth tungstate nanosheet heterojunction material and its preparation method and application
  • Graphite-phase carbon nitride nanosheet-supported single-layer bismuth tungstate nanosheet heterojunction material and its preparation method and application

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Experimental program
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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, adjust the initial concentration of ibuprofen in the solution to 10 mg / L, 15 mg / L, and 20 mg / L respectively, add 0.01 g of UTCB-50 from Example 1, and absorb After 0.5h, it was placed in a 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 ...

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Abstract

The invention discloses a graphite-phase carbon nitride nanosheet-supported single-layer bismuth tungstate nanosheet heterojunction material and its preparation method and application. The heterojunction material is based on g-C 3 N 4 Nanosheets as carriers, g‑C 3 N 4 The nanosheet is decorated with a single layer of Bi 2 WO 6 Nanosheets are hierarchical sheet structures. Its preparation method includes g‑C 3 N 4 Nanosheets and cetyltrimethylammonium bromide were added to Bi(NO 3 ) 3 ·5H 2 O solution, then add Na 2 WO 4 ·2H 2 O solution, and the resulting mixed solution is subjected to a hydrothermal reaction to obtain the heterojunction material of the present invention. The heterojunction material of the present invention has the advantages of high photocatalytic activity, stability, and can be reused many times. Its preparation method has the advantages of simple operation, low raw material cost, and low energy consumption. The heterojunction material of the present invention can be used to degrade antibiotics in waste water, and has the advantages of good degradation effect, simple application method, and easy operation.

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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Patent Type & Authority Patents(China)
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