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Simple bismuth oxyiodide quantum dot photocatalyst synthesizing method

A technology of bismuth iodide and quantum dots is applied in the field of simple synthesis of bismuth iodide quantum dot photocatalyst, which can solve the problems of low macroscopic efficiency, low utilization rate of visible light, simple preparation technology of BiOI quantum dot structure, etc. Photocatalytic degradation of organic pollutants, great application potential, high yield effect

Active Publication Date: 2015-08-05
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium dioxide has a wide band gap (3.0-3.2eV), usually only ultraviolet light (wavelength <400nm) can be used, and the utilization rate of visible light (wavelength range 400-760nm), which accounts for the main part of sunlight energy, is not high, and the macroscopic efficiency is low.
At present, there is no report on the simple preparation technology of BiOI quantum dot structure

Method used

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  • Simple bismuth oxyiodide quantum dot photocatalyst synthesizing method
  • Simple bismuth oxyiodide quantum dot photocatalyst synthesizing method
  • Simple bismuth oxyiodide quantum dot photocatalyst synthesizing method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1. Mix 34mL n-hexane, 9mL triton and 7mL n-hexanol, and stir magnetically for 30min at a speed of 800r / min;

[0026] 2. Add 20 μL of deionized water to the mixed oil phase formed in step 1, and continue stirring at the above stirring speed for 30 minutes;

[0027] 3, 1mmol bismuth nitrate (molecular formula Bi(NO 3 ) 3 ·5H 2 (2) and 1mmol potassium iodide (molecular formula KI) are dissolved in 10mL ethylene glycol respectively, obtain respectively the ethylene glycol solution of the bismuth nitrate of 100mmol / L and the ethylene glycol solution of potassium iodide;

[0028] 4. Under the stirring condition of 800r / min, drop the solution in step 3 into the oil-water mixing system in step 2 at a rate of 1 drop / s and continue stirring for 2h;

[0029] 5. After the reaction, centrifuge at 32000r / min for 20min, freeze the bottom product at -76°C, and dry at 50°C under 2Pa vacuum for about 6h to obtain the final sample.

[0030] Then the obtained samples were characterized...

Embodiment 2

[0035] 1. Mix 34mL n-hexane, 9mL triton, and 7mL n-hexanol, and stir magnetically at 1000r / min for 30min;

[0036] 2. Add 500 μL deionized water to the mixed oil phase formed in step 1, and continue stirring for 30 minutes;

[0037] 3. Mix 1mmol Bi(NO 3 ) 3 ·5H 2 O and 1mmol KI are dissolved in 10mL ethylene glycol respectively, and obtaining concentration is respectively the ethylene glycol solution of the bismuth nitrate of 100mmol / L and the ethylene glycol solution of potassium iodide;

[0038] 4. Under the stirring condition of 1000r / min, drop the solution in step 3 into the oil-water mixing system in step 2 at a rate of 1 drop / s and continue stirring for 2h;

[0039] 5. After the reaction, centrifuge at 30,000r / min for 15min, freeze the bottom product at -76°C, and dry at 50°C for about 6h under 2Pa vacuum to obtain the final sample (see Figure 5A ).

[0040] Depend on Figure 5A It can be seen that the obtained samples have two typical morphologies through scannin...

Embodiment 3

[0042] 1. Mix 34mL n-hexane, 9mL triton, and 7mL n-hexanol, and stir magnetically at 900r / min for 30min;

[0043] 2. Add 250 μL deionized water to the mixed oil phase formed in step 1, and continue stirring for 30 minutes;

[0044] 3. Mix 1mmol Bi(NO 3 ) 3 ·5H 2 O and 1mmol KI are dissolved in 10mL ethylene glycol respectively, and obtaining concentration is respectively the ethylene glycol solution of the bismuth nitrate of 100mmol / L and the ethylene glycol solution of potassium iodide;

[0045] 4. Under the stirring condition of 900r / min, drop the solution in step 3 into the oil-water mixing system in step 2 at a rate of 1 drop / s and continue stirring for 2h;

[0046] 5. After the reaction, centrifuge at 32000r / min for 20min, freeze the bottom product at -76°C, and dry at 50°C for about 6h under 2Pa vacuum to obtain the final sample (see Figure 5B ).

[0047] Depend on Figure 5B It can be seen that the obtained samples are particles with a size of 30-50 nm and no qua...

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Abstract

The invention relates to semiconductor nano function material synthesizing methods, particularly to a simple bismuth oxyiodide quantum dot photocatalyst synthesizing method. The simple bismuth oxyiodide quantum dot photocatalyst synthesizing method comprises adjusting the oil-phase and water-phase proportion of microemulsion, adding in bismuth nitrate and potassium iodide under stirring conditions, and performing uniform mixing to obtain controllable bismuth oxyodide quantum dots, wherein the volume ratio of the oil phase and the water phase is 2500-6400:1. The simple bismuth oxyiodide quantum dot photocatalyst synthesizing method is simple and takes only one step; reaction is achieved at room temperature and saves heating processes, thereby being low in energy consumption; short reaction time, uniform quantum dot material granularity and high yield rate can be obtained. The prepared bismuth oxyiodide quantum dots obtain efficient photocatalytic organic pollutant degradation capacity and utilization potential in the fields of environment pollution treatment and the like.

Description

technical field [0001] The invention relates to a method for synthesizing a semiconductor nanometer functional material, in particular to a method for easily synthesizing a bismuth oxyiodide quantum dot photocatalyst. Background technique [0002] Using the photovoltaic effect of semiconductor materials to convert solar energy into electrical energy and various forms of chemical energy is one of the current research hotspots in the fields of clean and renewable energy development, environmental pollution control, and material corrosion protection. In the past ten years, semiconductor photoactive materials (photocatalysts) represented by titanium dioxide have attracted the attention of many scientific research institutes and production companies because of their cheapness, safety, and stability. Self-cleaning glass, super-hydrophobic anti-corrosion and many other functional applications. Studies have found that the photoelectricity, photocatalysis, cathodic protection, surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B82Y40/00B82Y30/00
Inventor 刘朝红张盾
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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