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A method for preparing core-shell type bismuth vanadate@mesoporous silica composite material by using walnut green bark crude extract

A technology of core-shell bismuth vanadate and mesoporous silica, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., to achieve good stability and applicability Strong, practical and novel effect

Active Publication Date: 2020-10-23
INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are only a few research reports on the synthesis of composite materials based on the metal-polyphenol coordination assembly strategy at home and abroad, and it is even rarer to further design and construct multifunctional composite structure photocatalytic materials.

Method used

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  • A method for preparing core-shell type bismuth vanadate@mesoporous silica composite material by using walnut green bark crude extract
  • A method for preparing core-shell type bismuth vanadate@mesoporous silica composite material by using walnut green bark crude extract
  • A method for preparing core-shell type bismuth vanadate@mesoporous silica composite material by using walnut green bark crude extract

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] BiVO 4 The sample preparation steps are as follows:

[0038] Step A: get the bismuth salt of 0.02mol and be dissolved in the concentrated nitric acid of 20mL to obtain homogeneous solution, stir 2 hours; Described bismuth salt is Bi(NO 3 ) 3 ·5H 2 O;

[0039] Step B: 0.02mol of vanadium-containing compound is dissolved in 20mL of 6M NaOH aqueous solution, and the vanadium-containing compound is NH 4 VO 3 ;

[0040] Step C: Add the solution obtained in step B to the solution obtained in step A, then add 0.1 g cetyltrimethylammonium bromide (CTAB) to the obtained solution, stir for 2 hours, then slowly add 30 mL of 6M NaOH aqueous solution, A homogeneous suspension was obtained and stirred for 2 hours;

[0041] Step D: Add the solution obtained in step 3 into a 100mL stainless steel reaction kettle lined with polytetrafluoroethylene, keep it at 180°C for 48 hours, centrifuge the obtained product with deionized water several times, and then dry it at 60°C for 8 hour...

Embodiment 2

[0049] BiVO 4 The sample preparation steps are as follows:

[0050] Step A: get the bismuth salt of 0.02mol and be dissolved in the concentrated nitric acid of 20mL to obtain homogeneous solution, stir 2 hours; Described bismuth salt is Bi(NO 3 ) 3 ·5H 2 o 3 ;

[0051] Step B: 0.02mol of vanadium-containing compound is dissolved in 20mL of 6M NaOH aqueous solution, and the vanadium-containing compound is NH 4 VO 3 ;

[0052] Step C: Add the solution obtained in step B to the solution obtained in step A, then add 0.2 g cetyltrimethylammonium bromide (CTAB) to the obtained solution, stir for 2 hours, then slowly add 30 mL of 6M NaOH aqueous solution, A homogeneous suspension was obtained and stirred for 2 hours;

[0053] Step D: Add the solution obtained in step 3 into a 100mL stainless steel reaction kettle lined with polytetrafluoroethylene, keep it at 180°C for 48 hours, centrifuge the obtained product with deionized water several times, and then dry it at 60°C for 8 ...

Embodiment 3

[0061] BiVO 4 The sample preparation steps are as follows:

[0062] Step A: Dissolve 0.02mol of bismuth salt in 20mL of concentrated nitric acid to obtain a uniform solution, and stir for 2 hours; the bismuth salt is BiCl 3 ;

[0063] Step B: 0.02mol of vanadium-containing compound is dissolved in 20mL of 6M NaOH aqueous solution, and the vanadium-containing compound is Na 3 VO 4 ;

[0064] Step C: Add the solution obtained in step B to the solution obtained in step A, then add 0.2 g cetyltrimethylammonium bromide (CTAB) to the obtained solution, stir for 2 hours, then slowly add 30 mL of 6M NaOH aqueous solution, A homogeneous suspension was obtained and stirred for 2 hours;

[0065] Step D: Add the solution obtained in step 3 into a 100mL stainless steel reaction kettle lined with polytetrafluoroethylene, keep it at 180°C for 48 hours, centrifuge the obtained product with deionized water several times, and then dry it at 60°C for 8 hours. Get BiVO 4 sample. The purit...

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Abstract

The invention discloses a method for preparing a core-shell pucherite@mesoporous silica composite material by walnut green husk crude extraction liquid. Rich plant polyphenolic compounds in walnut green husk extracts are used; the kinds of metal ions are regulated and controlled; a pucherite@metal-plant polyphenol complex core-shell structure is synthesized through metal ion and plant polyphenol coordination assembly at the narrow energy gap semiconductor pucherite surface; on the basis, the core-shell pucherite@mesoporous silica composite material is designed and synthesized by a sol gel-calcination method. The prepared pucherite@mesoporous silica core-shell material has regular morphology and good stability; the used raw materials are cheap and can be easily obtained; the synthetized material can be widely applied to the fields of environment protection, catalysis, biological medicine and the like.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a method for preparing a core-shell type bismuth vanadate@mesoporous silica composite material by using crude walnut green bark extract. Background technique [0002] Plant polyphenols are a class of natural macromolecular compounds that widely exist in plants and are widely used in leather, chemical, pharmaceutical and other fields. Multiple ortho-phenolic hydroxyl groups in plant polyphenols can act as a multi-base ligand to coordinate with metal ions to form a stable five-membered ring chelate. This phenomenon was reported by T.L.Theis et al. in 1974 (Environ. Sci. Technol. 1974, 8, 569). Until recently, Frank Caruso's research group at the University of Melbourne reported for the first time that natural polyphenols and various metal ions can be used to coordinate one-step coating on various interfaces to produce films and capsules with various structures (Science2013, 34...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22
CPCB01J23/22B01J35/004B01J35/008
Inventor 胡银陈伟吴磊王慧宾胡居吾付建平
Owner INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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