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Bismuth oxyiodide composite photocatalytic material modified with carbon-coated ferroferric oxide magnetic microspheres as well as preparation method and application of bismuth oxyiodide composite photocatalytic material

A technology of carbon-coated ferric oxide and ferric oxide, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high charge recombination rate and agglomeration performance limitations, etc. Achieve the effects of improving photocatalytic performance and corrosion resistance, high yield, promoting separation and transformation

Active Publication Date: 2019-08-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, Fe 3 o 4 The high charge recombination rate and agglomeration performance also limit its practical application alone

Method used

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  • Bismuth oxyiodide composite photocatalytic material modified with carbon-coated ferroferric oxide magnetic microspheres as well as preparation method and application of bismuth oxyiodide composite photocatalytic material
  • Bismuth oxyiodide composite photocatalytic material modified with carbon-coated ferroferric oxide magnetic microspheres as well as preparation method and application of bismuth oxyiodide composite photocatalytic material
  • Bismuth oxyiodide composite photocatalytic material modified with carbon-coated ferroferric oxide magnetic microspheres as well as preparation method and application of bismuth oxyiodide composite photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A yeast carbon-coated ferric oxide microsphere modified bismuth oxyiodide composite photocatalytic material, the composite photocatalytic material is prepared by the following method:

[0062] (1) Cultivate Pichia pastoris in YPD (no agar) culture solution for 48 hours, take it out and centrifuge, wash with deionized water for 2 to 3 times and then centrifuge, then put it in a freeze dryer for - After drying at 50°C for 12 hours, it was made into freeze-dried powder.

[0063] (2) Get respectively 0.2g, 0.3g, 0.4g, 0.5g of Pichia pastoris freeze-dried powder and ferric chloride hexahydrate (FeCl) cultivated in step (1) 3 ·6H 2 (0), anhydrous sodium acetate and sodium acrylate are dissolved in the mixed solvent of 40mL ethylene glycol and diethylene glycol (the volume of two kinds of solvents is 20mL) to obtain mixed suspension, wherein FeCl 3 ·6H 2 O. The dosing concentrations of anhydrous sodium acetate and sodium acrylate are 62.5g / L, 85g / L, and 85g / L, respectively....

Embodiment 2

[0081] The photocatalytic degradation effect of the bismuth oxyiodide composite photocatalyst material modified by yeast carbon-coated iron ferric oxide magnetic microspheres on the photocatalytic degradation of antibiotic tetracycline wastewater was investigated.

[0082]The yeast carbon-coated iron ferric oxide magnetic microspheres modified bismuth oxyiodide composite photocatalytic materials (BF2C2, BF2C3, BF2C4, BF2C5) prepared in Example 1 were applied to the photocatalytic degradation treatment of tetracycline wastewater, and its implementation steps were the same as in Example 2 Same: Weigh 50 mg of BF2C2, BF2C3, BF2C4 and BF2C5 composite photocatalytic materials prepared in Example 1 respectively in a tetracycline simulated wastewater solution with a volume of 50 mL and a concentration of 30 mg / L, and vibrate for 1 h under the condition of avoiding light to make them After reaching the adsorption equilibrium, the photocatalytic degradation reaction was carried out unde...

Embodiment 3

[0084] To investigate the photocatalytic degradation of ciprofloxacin wastewater by yeast carbon-coated iron ferric oxide magnetic microspheres modified bismuth oxyiodide composite photocatalytic material of the present invention.

[0085] Modified bismuth oxyiodide composite photocatalyst material (BF2C3) with the yeast carbon-coated iron ferromagnetic microspheres prepared in Example 1 of the present invention, the pure bismuth oxyiodide (BiOI) material prepared in Comparative Example 1, and the The pure iron ferric oxide magnetic microspheres modified bismuth oxyiodide composite photocatalytic material (BF2) prepared in the ratio 2 is applied to the photocatalytic degradation treatment of ciprofloxacin wastewater, and its implementation steps are similar to those in Example 2: take 50mg respectively The prepared BF2C3, BiOI and BF2 photocatalytic material of embodiment 1, comparative example 1 and comparative example 2 are in the ciprofloxacin simulation waste water solution...

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Abstract

The invention discloses a bismuth oxyiodide composite photocatalytic material modified with carbon-coated ferroferric oxide magnetic microspheres as well as a preparation method and an application ofthe bismuth oxyiodide composite photocatalytic material. The preparation method of the composite photocatalytic material comprises the steps as follows: firstly, the carbon-coated ferroferric oxide magnetic microspheres are prepared with a hydrothermal carbonization method and the supported on the surface of bismuth oxyiodide in a hydrothermal co-deposition manner. Pichia pastoris in the compositeis cheap, easy to obtain, non-toxic and harmless, the preparation process is convenient, green and environmentally friendly, the reaction condition is easy to control, and secondary pollution is notproduced. The prepared composite catalytic material has uniform particle size, high light absorption strength, wide absorption range, high photon-generated carrier generation rate, good conduction effect and low composition rate, and the composite photocatalytic material has high stability and certain magnetism, can be recycled under the external magnetic field condition and has environmental protection benefits. The composite photocatalytic material has the advantages of being fast to degrade, high in removal rate, convenient to operate, low in cost, free of secondary pollution and the like when applied to photocatalytic degradation of antibiotic wastewater.

Description

technical field [0001] The invention belongs to the field of material preparation and environmental water treatment, and in particular relates to a carbon-coated iron ferric oxide magnetic microsphere modified bismuth oxyiodide composite photocatalytic material and a preparation method and application thereof. Background technique [0002] Semiconductor photocatalytic oxidation technology is a new type of modern water treatment technology. It realizes efficient degradation of organic pollutants, low-toxic conversion of heavy metals, effective catalytic reduction of carbon dioxide, and hydrogen production by electrolysis of water by effectively converting solar energy and other light energy into chemical energy. Oxygen production and other reaction processes have a wide range of environmental application prospects. However, the traditional semiconductor material TiO 2 The bandgap width is relatively large (3.2eV), and it can only respond to the ultraviolet spectrum that acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J35/08B01J37/10C02F1/30C02F101/38C02F101/34C02F101/36
CPCB01J27/06B01J37/10C02F1/30C02F2305/10C02F2101/34C02F2101/36C02F2101/38B01J35/39B01J35/33B01J35/51
Inventor 朱能武黄熙贤丁洋李敏婷柯怡欣李遥
Owner SOUTH CHINA UNIV OF TECH
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