A preparation method of bismuth vanadate@metal-polyphenol complex core-shell structure composite material using crude walnut green bark extract
A technology of walnut green husk and core-shell structure, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, water pollutants, etc., to achieve low energy consumption, simple operation, and strong applicability
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Embodiment 1
[0035] BiVO 4 The sample preparation steps are as follows:
[0036] 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;
[0037] 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 ;
[0038] Step C: Add the solution obtained in Step B to the solution obtained in Step A, then add 0.1 g of cetyltrimethylammonium bromide (CTAB) to the obtained solution, stir for 2 hours, then slowly add 30 mL of 6M NaOH aqueous solution , to obtain a homogeneous suspension, stirred for 2 hours;
[0039] 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....
Embodiment 2
[0047] BiVO 4 The sample preparation steps are as follows:
[0048] 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 ;
[0049] 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 ;
[0050] 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 , to obtain a homogeneous suspension, stirred for 2 hours;
[0051] 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...
Embodiment 3
[0059] BiVO 4 The sample preparation steps are as follows:
[0060] 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 ;
[0061] 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 ;
[0062] Step C: Add the solution obtained in Step B to the solution obtained in Step A, then add 0.3 g of cetyltrimethylammonium bromide (CTAB) to the obtained solution, stir for 2 hours, then slowly add 30 mL of 6M NaOH aqueous solution , to obtain a homogeneous suspension, stirred for 2 hours;
[0063] 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 purity ...
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