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Method for preparing KNb3O8 nanowire through laser inducing

A laser-induced, nanowire technology, used in chemical instruments and methods, inorganic chemistry, niobium compounds, etc., can solve problems such as nanostructure blanks, and achieve the effects of simple equipment, rich morphologies, and high aspect ratios

Active Publication Date: 2017-03-15
度测(上海)科技服务中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of KNb by laser-induced method 3 o 8 Research and reporting on nanostructures is almost blank

Method used

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  • Method for preparing KNb3O8 nanowire through laser inducing
  • Method for preparing KNb3O8 nanowire through laser inducing
  • Method for preparing KNb3O8 nanowire through laser inducing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 2.0g (7.5mmol) of niobium pentoxide powder, then dissolve 43.6682 g of KOH crystals into 30 mL of water to prepare a potassium hydroxide solution with a concentration of 25mol / L, and use a magnetic stirrer to fully dissolve it ; The ground niobium pentoxide powder will be weighed and added to the prepared 25mol / L potassium hydroxide alkaline solution, fully stirred with a magnetic stirrer to make it fully mixed; In the container, irradiate with laser light for 4 min. After the experiment, the substrate was taken out from the solution, washed several times with deionized water, and KNb 3 o 8 One-dimensional nanostructures.

Embodiment 2

[0036] Weigh 2.0g (7.5mmol) of niobium pentoxide powder, then dissolve 43.6682 g of KOH crystals into 30 mL of water to prepare a potassium hydroxide solution with a concentration of 25mol / L, and use a magnetic stirrer to fully dissolve it ; The ground niobium pentoxide powder will be weighed and added to the prepared 25mol / L potassium hydroxide alkaline solution, fully stirred with a magnetic stirrer to make it fully mixed; In the container, irradiate with laser light for 6 min. After the experiment, the substrate was taken out from the solution, washed several times with deionized water, and KNb 3 o 8 One-dimensional nanostructures. Comparing Example 2 with Example 1, the nanowires are needle-shaped and relatively long in length. Due to the increase in the number of nanowires, the luminous intensity is slightly higher than that of irradiation for 4 minutes.

Embodiment 3

[0038] Weigh 2.0g (7.5mmol) of niobium pentoxide powder, then dissolve 43.6682g of KOH crystals in 30mL of water to prepare a potassium hydroxide solution with a concentration of 25mol / L, and fully dissolve it with a magnetic stirrer; Add the ground niobium pentoxide powder that has been weighed into the prepared 25mol / L potassium hydroxide alkaline solution, and use a magnetic stirrer to stir thoroughly to make it fully mixed; add it to the container that has been placed in the substrate , irradiated with laser light for 8 min. After the experiment, the substrate was taken out from the solution and washed several times with deionized water to obtain KNb 3 o 8 One-dimensional nanostructures. Compared with Example 2, the nanowires are more dispersed, do not grow out of the clusters, and have a longer length. The number of nanowires is more, and the luminous intensity is the largest.

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Abstract

The invention provides a method for preparing a KNb3O8 nanowire through laser inducing and belongs to the technical field of novel functional materials. A 405nm semiconductor laser is used, Ti and Au are plated on quartz glass before an experiment, and the quartz glass serves as a substrate for growth of a potassium niobate nanowire. Nb2O5 powder is added into a potassium hydroxide solution, the ratio of K to Nb is 50:1, the materials are stirred for 15 min through a magnetic stirrer, and Nb2O5 is fully dissolved; the laser radiation time is 4-12 min. The microstructure is represented through XRD, SEM and other technical means, and it is indicated that the product is the KNb3O8 one-dimensional nanowire of the strongest diffraction peak on a (110) crystal face. Through testing of ultraviolet-visible absorption and photoluminescence performance, it is indicated that the band gap of KNb3O8 is 2.98 eV, and potential blue light luminescence characteristics are achieved. Through control over the laser radiation time, one-dimensional nanostructures with different lengths and thicknesses are generated, and the one-dimensional linear KNb3O8 nanostructures are generated through lasers for the first time.

Description

technical field [0001] The invention relates to a method for generating nanowires induced by laser, which belongs to the technical field of preparation of new functional materials. Background technique [0002] The laser-induced preparation of nanowires on the substrate is a novel method for preparing one-dimensional nanostructures. The morphology of the product depends on the time of laser irradiation, laser power, the thickness of the catalyst on the substrate surface, and the concentration of the reactant. factor control. Compared with some traditional preparation methods, it has many advantages, such as shorter sample preparation time, larger length-to-diameter ratio of the prepared nanowire structure, and rich and diverse shapes. [0003] Currently on KNb 3 o 8 The preparation of nanostructure materials mainly includes solid-state sintering method, molten salt method, and high-pressure hydrothermal method. However, the preparation of KNb by laser-induced method 3 o...

Claims

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Application Information

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IPC IPC(8): C01G33/00
CPCC01G33/00C01P2002/72C01P2004/03C01P2004/16C01P2004/61
Inventor 刘立英李瑞王如志严辉隋曼龄
Owner 度测(上海)科技服务中心
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