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Preparation method of earthy yellow (BiO)2CO3 multistage structure microsphere

A khaki, microsphere technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., can solve the problems of single function, narrow spectral response range, low photocatalytic efficiency, etc. The effect of high photocatalytic activity, easy material transport, and large specific surface area

Inactive Publication Date: 2019-10-25
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But unmodified (BiO) 2 CO 3 There are also shortcomings such as narrow spectral response r

Method used

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  • Preparation method of earthy yellow (BiO)2CO3 multistage structure microsphere
  • Preparation method of earthy yellow (BiO)2CO3 multistage structure microsphere
  • Preparation method of earthy yellow (BiO)2CO3 multistage structure microsphere

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Experimental program
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Effect test

Embodiment 1

[0029] This embodiment provides a kind of khaki (BiO) 2 CO 3 The preparation method of hierarchical microspheres comprises the steps of:

[0030] S1. Wash the reaction kettle in nitric acid solution, sodium hydroxide solution and aqueous solution respectively at 180°C, 140°C and 120°C for 2 hours and then dry it for later use;

[0031] S2. Put magnets in the reaction kettle, add ultrapure water and sodium citrate dihydrate into the reaction kettle, mix and stir for 10 minutes; take 25mL ultrapure water for every 1mmol of sodium citrate dihydrate;

[0032] In the present embodiment, the amount of sodium citrate dihydrate is 1 mmol, and the amount of ultrapure water is 25 mL.

[0033] S3, add Bi(NO in the reactor of step S2 3 ) 3 ·5H 2 0, making the mol ratio of sodium citrate dihydrate and bismuth nitrate pentahydrate be 2:1, and continue to stir for 1 hour to obtain mixed solution;

[0034] In this example, the amount of bismuth nitrate pentahydrate was 0.5 mmol.

[003...

Embodiment 2

[0045] This embodiment aims at understanding the khaki (BiO) obtained by the preparation method described in Example 1 by providing an experiment 2 CO 3 Environmental Purification Activity of Hierarchical Microspheres.

[0046] Take a certain amount of khaki (BiO) 2 CO 3 A multi-level structure microsphere powder catalyst, and take a certain amount of cadmium sulfate of different qualities and dissolve it in a certain amount of water. The two are mixed and adsorbed for a certain period of time, and the concentration of the material before and after the adsorption of Cd is detected by an inductively coupled plasma emission spectrometer. The adsorption capacity of the material to Cd, the adsorption capacity obtained by the test is as follows Figure 7 Shown, the maximum adsorption capacity of product by Freundlich and Langmuir adsorption curve fitting is 1115.7mg / g. At the same time, fix a certain concentration of cadmium sulfate and add the same mass of khaki (BiO) 2 CO 3...

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Abstract

The invention discloses a preparation method of an earthy yellow (BiO)2CO3 multistage structure microsphere, which comprises the following steps: magnets are put into a dry reaction kettle, ultrapurewater, sodium citrate dihydrate and Bi(NO3)3.5H2O are mixed and stirred to obtain a mixed solution; the pH of the mixed solution is adjusted with ammonia to maintain the pH of the mixed solution at 7-8 and the mixture is continuously stirred; at that end of stirring, the reaction kettle is tightened, put into an oven, and the mixture is hydrothermally reacted for 24 hours at 180 DEG C; as that reaction kettle is cooled to room temperature, centrifugal washing is performed with distilled water and anhydrous ethanol in turn, and then drying is carried out in a vacuum dry oven at 65 DEG C; the obtained earthy yellow (BiO)2CO3 multistage structure microspheres are obtained. The invention can not only effectively absorb heavy metal ions in the water environment, but also photocatalytically degrade organic pollutants in the water body and realize various environmental purification functions of a material through the earthy yellow (BiO) 2CO3 multistage structure microspheres controllably synthesized by the hydrothermal method.

Description

technical field [0001] The invention relates to the technical field of inorganic nanomaterials, in particular to a khaki (BiO) 2 CO 3 Preparation method of hierarchical structure microspheres. Background technique [0002] Water pollution has become an important issue restricting the sustainable development of our society. How to develop high-efficiency new environmental purification materials and realize the comprehensive elimination of heavy metal ions and organic pollutants in water is still a challenge. Photocatalytic technology is an advanced oxidation technology that can effectively degrade organic pollutants in water by using "green" sunlight. Among many photocatalysts, layered (BiO) 2 CO 3 It has the advantages of high photocatalytic activity, low price, good stability and non-toxicity. But unmodified (BiO) 2 CO 3 There are also shortcomings such as narrow spectral response range (only absorbing ultraviolet light), low photocatalytic efficiency, and single fu...

Claims

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Application Information

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IPC IPC(8): B01J27/236B01J20/04B01J20/28B01J20/30C02F1/28C02F1/30C02F101/20C02F101/30
CPCB01J20/043B01J20/28021B01J20/28054B01J27/236B01J35/004B01J35/08B01J35/10C02F1/281C02F1/30C02F2101/20C02F2101/30
Inventor 马德琨满丽萍徐全龙李文豪
Owner WENZHOU UNIVERSITY
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