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Preparation method of monoclinic phase ditetrahedron bismuth vanadate crystal

A bismuth tetrahedron and bismuth vanadate technology, which is applied in chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., can solve the problem of not finding nano-scale bismuth tetrahedral bismuth vanadate, and achieve good dispersion and low energy consumption. The effect of low, uniform size and shape

Inactive Publication Date: 2013-10-02
XIDIAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0007] However, so far, no report has been found on the preparation of nano-sized ditetrahedral bismuth vanadate by solvothermal method using oleylamine as surfactant and organic toluene as solvent.

Method used

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  • Preparation method of monoclinic phase ditetrahedron bismuth vanadate crystal
  • Preparation method of monoclinic phase ditetrahedron bismuth vanadate crystal
  • Preparation method of monoclinic phase ditetrahedron bismuth vanadate crystal

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Embodiment 1

[0030] (1) 0.00177molBi(NO 3 ) 3 ·5H 2 O dissolved in 30 mL 1mol / L HNO 3 solution, and added 1.3g NaOH to obtain mixed solution A;

[0031] Mix n-octanoic acid and toluene (total volume is 30 mL) to obtain solution B;

[0032] (2) Mix solution A and solution B, stir at room temperature for 30 minutes, stand still for 10 minutes, extract through a separatory funnel, and take upper solution C;

[0033] (3) 0.00177mol NaVO 3 Dissolve in 30 mL of HNO at pH = 0.5 3 Get solution D;

[0034] Mix tri-n-octylamine and toluene (the total volume is 30 mL) to obtain solution E;

[0035] (4) Mix solution D and solution E, stir at room temperature for 30 minutes, stand still for 10 minutes, extract through a separatory funnel, and take upper solution F;

[0036](5) Mix solution C and solution F, add 3.0 mL of oleylamine, and stir for 30 minutes to obtain solution G;

[0037] (6) Put solution G in a polytetrafluoroethylene container, react at 160°C for 20 hours, cool to room te...

Embodiment 2

[0043] The present embodiment prepares the method for bismuth vanadate all the other to be identical with embodiment 1, difference is in step (1): add 1.4g NaOH; In step (3): HNO 3 The pH is 0.45:; in step (5): the amount of oleylamine added is 3.2mL; step (6): solution G is reacted at 180°C for 20 hours.

[0044] as attached Figure 4 As shown, it is the XRD pattern of the double tetrahedral bismuth vanadate nanopowder prepared in this embodiment, and it can be seen that its purity is relatively high.

[0045] as attached Figure 5 As shown, it is the SEM image of the double tetrahedral bismuth vanadate nanopowder prepared in this embodiment, its magnification is 100000 times, and the obtained sample has initially appeared double tetrahedral crystals, and this stage is in the direction of double tetrahedral vanadium bismuth acid transition state.

[0046] The invention adopts a simple solvothermal preparation process to prepare ditetrahedral bismuth vanadate crystals with...

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Abstract

The invention relates to a preparation method of a monoclinic phase ditetrahedron bismuth vanadate crystal. The method comprises steps of: dissolving Bi (NO3) 3.5H2O in a HNO3 solution, adding 1.3-1.4g of NaOH to obtain a mixed solution A, mixing a certain amount of n-caprylic acid and toluene to obtain a mixed solution B, mixing the solution A and the solution B, stirring, standing, and taking an upper layer solution C; dissolving NaVO3 in HNO3 solution with a certain pH value to obtain a solution D, mixing a certain amount of tri-n-octylamine and toluene to obtain a mixed solution E, mixing the solution D with the solution E, stirring, standing, and taking an upper layer solution F; then mixing the solution C and the solution F, adding 2-4 mL of oil amine, stirring evenly to obtain a solution G, adding the solution G in a teflon container, reacting for 16-20 h at high temperature, cooling, centrifuging and cleaning to obtain a sample; and finally, drying the sample in a vacuum drying box to obtain the monoclinic phase ditetrahedron bismuth vanadate crystal. The method provided by the invention can prepare monoclinic phase ditetrahedron bismuth vanadate crystal with good dispersion, uniform morphology and small particle size, and has a simple preparation process and a short cycle.

Description

technical field [0001] The invention relates to a preparation method of photocatalyst-bismuth vanadate, in particular to a preparation method of monoclinic double tetrahedral bismuth vanadate crystals. Background technique [0002] In recent years, the environmental and resource issues brought about by rapid economic development have attracted more and more attention. The use of semiconductor photocatalytic technology to degrade and eliminate harmful substances has gained widespread attention. The method has the characteristics of high efficiency, energy saving, and no secondary pollution. At present, the photocatalyst with more research and application at home and abroad is TiO 2 ,TiO 2 It has the advantages of small particle size, narrow particle size distribution, high purity, low price, non-toxic, stable, long service life, etc. It has shown broad application prospects in the fields of environmental protection and governance. However, since titanium dioxide has a band...

Claims

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Application Information

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IPC IPC(8): C01G31/00
Inventor 姜海青马云峰李智敏张文佳靳博席莹
Owner XIDIAN UNIV
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