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EuWo4 (OH) nanoribbon and preparation method of composite material thereof

A technology of nanobelt and tungstic acid, which is applied in the field of preparation of functional nanomaterials, can solve problems such as product impurity, and achieve the effects of good product purity, low production cost, and simple operation

Active Publication Date: 2017-05-31
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preparation of SmWO by a hydrothermal method by Li et al. 4 (OH) nanosheets, but the product is impure and contains Sm 2 WO 6 nanosheets, and this sheet is thicker

Method used

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  • EuWo4 (OH) nanoribbon and preparation method of composite material thereof
  • EuWo4 (OH) nanoribbon and preparation method of composite material thereof
  • EuWo4 (OH) nanoribbon and preparation method of composite material thereof

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Experimental program
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Effect test

Embodiment 1

[0026] Mix ammonium tungstate (42mg), thiourea (128mg), europium nitrate (20mg) and 19.44mL of water, heat to dissolve, then add it to a 25mL polytetrafluoroethylene-lined hydrothermal kettle, put it into the To a 220°C oven, react at 220°C for 24 hours. After the reaction was completed, it was left to cool naturally at room temperature. The white solid obtained by the reaction was separated by centrifugation (washed three times with ethanol, washed three times with water), and finally obtained the target product EuWO 4 (OH) nanobelts. figure 1 Shown is the scanning electron micrograph of the product, and it can be seen that the product is a ribbon-shaped material. image 3 Shown is the X-ray single crystal diffraction pattern of the product, the peaks on the spectrum are consistent with the standard card JCPDS card No.23-0428, and there are no miscellaneous peaks, which shows that the purity of basic europium molybdate is very high.

Embodiment 2

[0030] Mix ammonium tungstate (42mg), thiourea (121mg), europium nitrate (16mg) and 19.44mL of water, heat to dissolve, then add it to a 25mL polytetrafluoroethylene-lined hydrothermal kettle, put it into the To a 230°C oven, react at 230°C for 25 hours. After the reaction was completed, it was left to cool naturally at room temperature. The white solid obtained by the reaction was separated by centrifugation (washed three times with ethanol, washed three times with water), and finally obtained the target product EuWO 4 (OH) nanobelts.

Embodiment 3

[0032] Mix ammonium tungstate (42mg), thiourea (130mg), europium nitrate (30mg) and 19.44mL of water, heat to dissolve, then add it to a 25mL polytetrafluoroethylene-lined hydrothermal kettle, put it into the To a 210°C oven, react at 210°C for 23 hours. After the reaction was completed, it was left to cool naturally at room temperature. The white solid obtained by the reaction was separated by centrifugation (washed three times with ethanol, washed three times with water), and finally obtained the target product EuWO 4 (OH) nanobelts.

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Abstract

The invention relates to a EuWo4 (OH) nanoribbon and a preparation method of a composite material thereof and belongs to the technical field of nanometer material preparation. Through the hydrothermal method, taking ammonium tungstate, thiourea, europium nitrate and water as raw materials, under specific reaction conditions, hydroxyl tungsten oxide europium nanoribbons are compounded by a one-step method; then under photochemical reaction conditions, the nanoribbons and chloroauric acid are compounded into the EuWo4 (OH) / Au composite material; and hydrogen peroxide is detected over the composite material through the fluorescence method. According to the composite material, operation is easy during preparation, the production period is short, production cost is low, the production rate is high, by-products are not generated, and commercialization large-scale preparation is facilitated.

Description

technical field [0001] The present invention has developed a EuWO 4 The invention discloses a preparation method of (OH) nanobelt and composite material thereof, and relates to the technical field of preparation of functional nanometer materials. [0002] technical background [0003] Two-dimensional transition metal dichalcogenides have become popular materials in fundamental science as well as in applications. In recent years, the applications of these materials in electronics and optoelectronics have been extensively explored. Since the bandgaps of most 2D transition metal dichalcogenides are in the visible to near-infrared wavelength range, these materials are suitable for light emitters, photodetectors, and solar cells, among others. Unlike III-V semiconductors, the optical properties of 2D transition metal dichalcogenides are dominated by excitons with strong binding energies (approximately 300 meV) and large radii (∼1.6 nm). But its luminescence quantum yield is low...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/24C30B29/32C01G41/00C01F17/00B82Y40/00B82Y30/00
CPCC30B29/32B82Y30/00B82Y40/00C01G41/00B22F9/24C01P2002/72C01P2004/03C01P2004/17C01F17/32B22F1/0551B22F1/054
Inventor 黄晓黄维於玲琳
Owner NANJING UNIV OF TECH
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