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Functional three-defect-site silicotungstate composite nano material as well as preparation method and application thereof

A technology of composite nanomaterials and silicotungstate, which is applied in the preparation and application of nanomaterials, can solve the problems of relatively few studies on photoluminescence properties, and achieve easy control of preparation conditions, good catalytic efficiency, and high degradation rate Effect

Active Publication Date: 2019-06-21
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Photoluminescence properties, as an important property of PNMs, have received more and more attention in recent years, but compared with other properties of PNMs, researches on photoluminescence properties are relatively few

Method used

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  • Functional three-defect-site silicotungstate composite nano material as well as preparation method and application thereof
  • Functional three-defect-site silicotungstate composite nano material as well as preparation method and application thereof
  • Functional three-defect-site silicotungstate composite nano material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A functional three-vacancy silicotungstate composite nanomaterial NiS-CdS-CuSiW 9 The preparation method comprises the following steps:

[0040] (1) CuSiW 9 Preparation of nanowhiskers: 1.335 g CH 3 COONa·3H 2 O and 11 µl of CH 3 COOH was dissolved in 20 ml of distilled water, and 0.416 g of Cu(CH 3 COO) 2 ·H 2 O was added to the above solution under stirring until dissolved, and then heated to 70°C; under stirring at 70°C, a total of 1.926g of Na 9 [SiW 9 o 34 ]·18H 2 O, after reacting for 1 hour, cool down to room temperature, and obtain a green clear solution by suction filtration. Take 5ml of the green clear solution and add 0.251 g polyethylene glycol 8000, then add 4.5mol / l KCl 240µL dropwise, stir for 6 hours, and the precipitate is CuSiW 9 nano whiskers;

[0041] (2) Preparation of CdS: 160ml 0.4 mol / l Na 2 S·9H 2 O was added dropwise to 200 ml of 0.4 mol / l CdCl under vigorous stirring 2 solution, stirred for 6 h and left to stand for 12 h to obtai...

Embodiment 2

[0049] The difference between this example and Example 1 is that in step (3) in the photoreactor, CdS and CuSiW 9 The mass ratio is 1:0.5, that is, 0.260 g CdS and 0.13 g CuSiW are used 9 .

Embodiment 3

[0051] The difference between this example and Example 1 is that the CdS and CuSiW in the photoreactor in step (3) 9 The mass ratio of 1:1.5, that is, using 0.260 g CdS and 0.39 g CuSiW 9 .

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Abstract

The invention belongs to the technical field of preparation and application of nano materials, and particularly relates to a functional three-defect-site silicotungstate composite nano material as well as a preparation method and application thereof. According to the functional three-defect-site silicotungstate composite nano material, NiS-CdS-doped silicotungstate is used to discuss the photocatalysis and luminous properties of the functional three-defect-site silicotungstate composite nano material; and when the ratio of NiS-CdS to CuSiW9 is 1 to 1, the photocatalytic hydrogen output is thehighest, and the degradation rate of rhodamine B is 62.7 percent at most. The nano material prepared by the preparation method can be used as a photocatalyst applied to industrial wastewater treatment, and also has a wide application prospect in preparation of clean energy by photocatalytic hydrogen production. The method is easy to operate and repeat, and the raw materials used are easy to obtainand low in cost.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of nanomaterials, and in particular relates to a functional triple-vacancy silicotungstate composite nanomaterial and its preparation method and application. Background technique [0002] Polyoxometalates (POMs), as a special kind of inorganic compounds, have a wide range of applications in catalysis, magnetism, medicine and materials science. Polyoxometallate-based nanomaterials (PNMs), as a subclass of POM chemistry, have attracted extensive attention due to their unique properties compared with conventional single-crystal POM compounds. The application of nanotechnology in the preparation of PNMs is a new avenue for the development of POMs in recent years, and many researchers have been working hard to study these materials. To date, various PNMs with different morphologies and properties have been reported. In 2011, Cronin et al. discovered a general method for fabricatin...

Claims

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Application Information

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IPC IPC(8): B01J31/16B01J27/043C02F1/30C02F101/38
Inventor 王冠刘宁汪佳欣吴娅宁
Owner HENAN UNIVERSITY