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Bi (III)-metal-oxygen cluster inorganic framework as well as preparation method and application thereof

An inorganic framework and oxygen cluster technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, special compound water treatment, etc., can solve the problem of easy loss of active components, high recyclability, Low recycling rate and other issues, to achieve the effect of high recycling rate, rich bismuth resources, and improved catalytic activity

Inactive Publication Date: 2016-10-12
ZHONGBEI UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

It was found that the bismuth-containing metal oxygen clusters were used to photocatalytically degrade nitrogen-containing organic dyes such as methyl orange (MO), methylene blue (MB), and rhodamine B (RhB), and the degradation rate could reach 90% within 1 hour. The above, and can be completely separated after simple filtration, and the recycling rate is high, which overcomes the defects of traditional POMs photocatalysts such as difficult separation, easy loss of active components, and low recycling rate.

Method used

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  • Bi (III)-metal-oxygen cluster inorganic framework as well as preparation method and application thereof
  • Bi (III)-metal-oxygen cluster inorganic framework as well as preparation method and application thereof
  • Bi (III)-metal-oxygen cluster inorganic framework as well as preparation method and application thereof

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Effect test

Embodiment 1

[0044] Embodiment 1, Bi(Ⅲ)-metal oxide cluster (PM 12 o 40 ) Preparation of inorganic skeleton:

[0045] Accurately weigh 0.0243g (0.05mmol) of Bi(NO 3 ) 3 ·5H 2 O, 0.07301 g (0.04 mmol) of H 3 PMo 12 o 40 , mix and dissolve in 10ml of absolute ethanol solvent, add 3ml of HNO with a concentration of 1.0mol / L 3 The solution was magnetically stirred at room temperature for 15 min. The mixture was transferred to a 20ml reaction kettle, reacted at 150°C for 3 days, and finally cooled to room temperature at 5°C / hour, washed with distilled water and absolute ethanol, filtered, and dried to obtain black rod-shaped or small particle crystals.

Embodiment 2

[0046] Embodiment 2, Bi(Ⅲ)-metal oxide cluster (PM 12 o 40 ) Inorganic framework crystallographic structure parameters

[0047] The crystal structure of the Bi(Ⅲ)-metal oxide cluster (PM12O40) inorganic framework obtained in Example 1 was determined as follows: a single crystal with a suitable size was selected under a microscope for X-ray single crystal structure analysis. The X-ray diffraction data of crystals were collected by German Bruker Smart-Apex CCD surface detection X-ray single crystal diffractometer, using Mo-Kα target, measured at room temperature. Data reduction and structural elucidation were performed using the SHELXTL-97 program. The main crystallographic data of the inorganic framework are listed in Table 1.

[0048] Table 1. Crystallographic structural parameters of the inorganic framework

[0049]

Embodiment 3

[0050] Embodiment 3, experimental operation of photocatalytic degradation of nitrogen-containing organic dyes:

[0051] (1) First prepare the concentration of 2×10 -5 mol / L methyl orange MO (6.5466mg), methylene blue MB (7.4780mg), rhodamine B (RhB (9.5802mg) and other nitrogen-containing organic dye solutions for use.

[0052] (2) Add the Bi(Ⅲ)-metal oxide cluster (PM 12 o 40 ) Degradation experiment after the inorganic skeleton: Pipette 100ml of the above-mentioned prepared organic dye solution in a large beaker respectively, and add 1.0mol / L of HNO 3 Adjust the pH of the solution to 2.5, add a weighed 20 mg sample, and stir magnetically for 30 minutes in a dark environment to ensure the adsorption balance between the organic dye and the sample. Then put it under a 30W ultraviolet lamp for a certain period of time, and keep stirring, take 3ml of the solution every 10min for ultraviolet-visible photometric analysis, so as to determine its degradation rate.

[0053] (3) Bl...

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Abstract

The invention belongs to the technical filed of photocatalysis and particularly provides a Bi (III)-metal-oxygen cluster inorganic framework as well as a preparation method and an application thereof. The Bi (III)-metal-oxygen cluster inorganic framework is applied to the field of photocatalytic degradation of organic dyes, and the chemical formula of the inorganic framework is [PMo12O40Bi2(H2O)2].4H2O. The Bi (III)-metal-oxygen cluster inorganic framework is prepared with a solvothermal method, the process is simple, the purity is high, and the reproducibility is good; further, Bi resources in China are rich, polyacid raw materials are safe, non-toxic, cheap and available, the catalytic activity of metal-oxygen clusters modified with Bi (III) is improved obviously, and accordingly, the Bi-containing metal-oxygen clusters have broad prospect in the field of photocatalysis research. The Bi (III)-metal-oxygen cluster inorganic framework without grinding can be directly used in a photocatalytic degradation experiment, complete separation can be realized through simple filtering, the circulation utilization rate is high, the defects of difficulty in separation, high probability of loss of active components, low circulation utilization rate and the like of a traditional POMs (polyoxometallates) photocatalyst are overcome, and industrial application is facilitated.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a Bi(III)-metal oxygen cluster inorganic framework and a preparation method and application thereof, which are used in the field of photocatalytic degradation of organic dyes. Background technique [0002] With the continuous development of industrial economy, environmental pollution has become a major problem that needs to be solved urgently in today's society. The treatment of wastewater has also become one of the important research contents of chemists. In water pollution, organic dyes have always been a major problem in wastewater treatment due to their poor biodegradability, high toxicity, not easy to fade, and complex components. Because these dyes are toxic to animals and humans, it is particularly important to seek an efficient and economical degradation method. However, traditional adsorption methods, membrane separation methods, coagulation methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/192B01J31/18C02F1/32C02F101/38
CPCB01J27/192C02F1/32C02F2101/308C02F2101/38C02F2305/10
Inventor 宋江锋王俊周瑞莎贾盈盈邱晓敏李思哲
Owner ZHONGBEI UNIV
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