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Bismuth oxybromide-copper oxide nano composite photo catalyst and preparation method thereof

A bismuth oxybromide and nano-composite technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as limiting solar energy utilization, and achieve cheap raw materials, easy access to raw materials, and easy operation. easy effect

Active Publication Date: 2018-01-05
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional photocatalyst TiO 2 It is a typical wide bandgap (3.0-3.2eV) semiconductor material, which can only respond in the ultraviolet region, thus limiting its utilization of solar energy

Method used

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  • Bismuth oxybromide-copper oxide nano composite photo catalyst and preparation method thereof
  • Bismuth oxybromide-copper oxide nano composite photo catalyst and preparation method thereof
  • Bismuth oxybromide-copper oxide nano composite photo catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] ①. Preparation of bismuth oxybromide nanosheets

[0027] Weigh 3mmol of CTAB (about 1.0911g), 3mmol of Bi(NO 3 ) 3 ·5H 2 O (about 1.4551g) was put into the reaction kettle, added 55mL of distilled water, stirred for 25min to make it fully dissolved, then adjusted the pH of the solution to 4 with 1M NaOH solution, and continued to stir for 0.5h; after 30h at 160°C , naturally cooled to room temperature, suction filtered, dried, and collected to obtain round bismuth oxybromide nanosheets.

[0028] See attached figure 1 , by the X-ray powder diffraction analysis (XRD) spectrogram of the bismuth oxybromide nanosheet that the method described in step 1. in embodiment 1 makes. The peak positions of the spectral lines in the figure correspond to all the diffraction crystal planes of the JCPDF standard card (09-0393), and the index is the tetragonal BiOBr crystal, the space group P4 / nmm, and the lattice constant No impure diffraction peaks were found, indicating that pure...

Embodiment 2

[0035] ①. Preparation of bismuth oxybromide nanosheets

[0036] Weigh 2mmol of CTAB (about 0.7274g), 2mmol of Bi(NO 3 ) 3 ·5H 2 O (about 0.9700g) is put into the reaction kettle, add 45mL of distilled water, stir for 15min to make it fully dissolved, then adjust the pH of the solution to 3 with 1M NaOH solution, and continue to stir for 1.5h; keep warm at 180°C for 10h , naturally cooled to room temperature, suction filtered, dried, and collected to obtain round bismuth oxybromide nanosheets.

[0037] ②. Reaction on bismuth oxybromide nanosheets to form copper oxide nanocrystals

[0038] Take a round bottom flask, add 0.0915g of bismuth oxybromide (about 0.328mmol) nanosheets, 1mL of distilled water and 29mL of DMF, ultrasonically disperse for 25min; then add 0.3mmol of Cu(CH 3 COO) 2 ·H 2 O, stir to dissolve; transfer the solution to an ultrasonic reactor (cylindrical, 50W), the temperature of the water bath is 80°C, and the ultrasonic irradiation time is 60min. After t...

Embodiment 3

[0042] ①. Preparation of bismuth oxybromide nanosheets

[0043] Weigh 2.5mmol of CTAB (about 0.9093g), 2.5mmol of Bi(NO 3 ) 3 ·5H 2 O (about 1.2126g) was put into the reaction kettle, added 50mL of distilled water, stirred for 20min to make it fully dissolved, then adjusted the pH of the solution to 2 with 1M NaOH solution, and continued to stir for 1h; after insulated at 170°C for 17h, Naturally cooled to room temperature, suction filtered, dried, and collected to obtain round bismuth oxybromide nanosheets.

[0044] ②. Reaction on bismuth oxybromide nanosheets to form copper oxide nanocrystals

[0045] Take a round bottom flask, add 0.1219g of bismuth oxybromide (about 0.4mmol) nanosheets, 1mL of distilled water and 29mL of DMF, ultrasonically disperse for 20min; then add 0.5mmol of Cu(CH 3 COO) 2 ·H 2 O, stir to dissolve; transfer the solution to an ultrasonic reactor (cylindrical, 50W), the temperature of the water bath is 80°C, and the ultrasonic irradiation time is ...

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Abstract

The invention discloses a bismuth oxybromide-copper oxide nano composite photo catalyst and a preparation method thereof and relates to the technical field of preparation of photo catalyst materials.Firstly, cetyl trimethyl ammonium bromide reacts with bismuth nitrate to prepare bismuth oxide nano sheets, and then copper oxide nano crystal is generated on the bismuth oxide nano sheets after reaction. The microstructure of the prepared bismuth oxybromide-copper oxide nano composite photo catalyst is that the copper oxide nano crystal evenly grows on the surfaces of the circular bismuth oxide nano sheets, the diameter of the bismuth oxide nano sheets is 0.5-2 micrometers, the thickness of the bismuth oxide nano sheets is 20-50 nm, the copper oxide nano crystal is quantum dot, and the particle size is within 1-5 nm. The bismuth oxybromide-copper oxide nano composite photo catalyst has high visible-light catalytic activity, can remarkably improve the degrading rate of organic dye and is expected to be used for helping sunlight to degrade organic pollutants in water. The preparation method is simple in technology and device, easy to operate and good in repeatability, raw materials arelow in cost and easy to obtain, and the bismuth oxybromide-copper oxide nano composite photo catalyst is suitable for industrialization production.

Description

technical field [0001] The invention relates to the technical field of preparation of photocatalyst materials, in particular to a bismuth oxybromide-copper oxide nanocomposite photocatalyst and a preparation method thereof. Background technique [0002] Since modern times, due to the massive consumption of fossil raw materials such as coal, oil and natural gas, human beings are facing a great energy crisis and severe environmental pollution problems. In 1972, Fujishima and Honda reported TiO 2 The electrode decomposes water to produce hydrogen under near-ultraviolet light irradiation, thus kicking off the prelude to photocatalytic research. Traditional photocatalyst TiO 2 It is a typical wide-bandgap (3.0-3.2eV) semiconductor material, which can only respond in the ultraviolet region, thus limiting its utilization of solar energy. In recent years, bismuth-based materials have attracted more and more attention from scholars due to their better photocatalytic activity in te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J35/02B01J35/00
Inventor 胡寒梅徐娟娟汪建邓崇海
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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