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Method for controllably synthesizing different shapes of niobium pentoxide nanomaterials without template hydrothermal heat

A technology of niobium pentoxide and nanomaterials, applied in chemical instruments and methods, inorganic chemistry, nanotechnology, etc., can solve the problems of expensive experimental drugs and complex synthetic routes, and achieve simple experimental conditions, wide application prospects, and uniform distribution Effect

Inactive Publication Date: 2018-02-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The synthesis of niobium pentoxide, the research object, is mostly reported in the literature using hydrothermal / solvothermal synthesis methods, and most of the prepared niobium pentoxide nanorods and microspheres are also prepared by other methods such as oxidation. Niobium pentoxide, this type of synthesis method requires special experimental equipment, the synthesis route is complicated, and experimental drugs are often expensive

Method used

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  • Method for controllably synthesizing different shapes of niobium pentoxide nanomaterials without template hydrothermal heat
  • Method for controllably synthesizing different shapes of niobium pentoxide nanomaterials without template hydrothermal heat
  • Method for controllably synthesizing different shapes of niobium pentoxide nanomaterials without template hydrothermal heat

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Effect test

example 1

[0030] Add 1.5 mmol of niobium pentachloride and 7.5 mmol of sodium carbonate powder into 30 mL of deionized water, put it in a 100 mL beaker, put it into an ultrasonic instrument for 15 minutes to make it evenly mixed, and then pour it into 50 mL of polytetrafluoroethylene Put it in a reaction kettle with vinyl fluoride substrate, seal it, put it in an oven, control the temperature of the oven at 200°C, and react for 12 hours. After washing several times and drying at 80°C for 3 hours, the nanorods of niobium pentoxide were obtained.

[0031] figure 1 Among them, there are no other miscellaneous peaks, and the positions and relative intensities of each diffraction peak are consistent with the JPCDS card (28-0317), indicating that the product is hexagonal-like niobium pentoxide.

[0032] from figure 2 It can be seen that the prepared niobium pentoxide nanorods have a diameter of about 60 nanometers and a length of about 2 microns.

example 2

[0034] Add 1.5 mmol of niobium pentachloride and 7.5 mmol of sodium carbonate powder into 30 mL [deionized water: absolute ethanol (v / v) = 1:1], put it in a 100 mL beaker, and put it into an ultrasonic instrument Ultrasound for 15 minutes to make it evenly mixed, then pour it into a 50 mL polytetrafluoroethylene-lined reaction kettle, seal it, place it in an oven, control the temperature of the oven at 200°C, and react for 12 hours. After the reaction, cool with the oven to At room temperature, the precipitated product was separated by centrifugation, washed several times with deionized water and absolute ethanol, and dried at 80°C for 3 hours to obtain niobium pentoxide nanowires with a diameter of about 50 nanometers, such as image 3 shown.

example 3

[0036] Add 1.5 mmol of niobium pentachloride and 7.5 mmol of sodium carbonate powder to 30 mL [deionized water: ethylene glycol (v / v) = 1:1], put it in a 100 mL beaker, and put it into the ultrasonic instrument Ultrasound for 15 minutes to make it evenly mixed, then pour it into a 50 mL polytetrafluoroethylene-lined reaction kettle, seal it, place it in an oven, control the temperature of the oven at 200°C, and react for 12 hours. After the reaction, cool with the oven to At room temperature, the precipitated product was separated by centrifugation, washed several times with deionized water and absolute ethanol, and dried at 80°C for 3 hours to obtain niobium pentoxide nanobelts. Figure 4 It can be seen that the bandwidth of the nanoribbon is about 150 nanometers, and the thickness is about 15 nanometers.

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Abstract

The invention belongs to the technical field of inorganic nanomaterials, and particularly relates to a method for controllably synthesizing different shapes of niobium pentoxide nanomaterials withouttemplate hydrothermal heat. The method specifically comprises the following steps: firstly, mixing a certain amount of niobium inorganic matter ionic salt with a precipitant according to a certain ratio, and respectively dissolving into three different solvents; then performing ultrasonic treatment for 15-30 minutes, completely dissolving solid powder and evenly mixing; and finally, respectively transferring the three solutions into a reaction kettle with a polytetrafluoroethylene substrate, sealing, putting into a drying oven, controlling the temperature of the drying oven to be 180-200 DEG C, reacting for 8-12 hours, and after the reaction is over, cooling the product to be at room temperature; centrifugally separating the precipitated product, collecting solids, rinsing for multiple times with deionized water and absolute ethyl alcohol, and performing vacuum drying, to obtain the niobium pentoxide nanobars, nanowires and nanoribbon materials.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanomaterials, and specifically relates to a template-free method for hydrothermally controllable synthesis of niobium pentoxide nanomaterials with different shapes, specifically a method for synthesizing niobium pentoxide nanorods, nanowires and nanobelts. Background technique [0002] Niobium pentoxide is an important n-type wide bandgap semiconductor material with a bandgap of 3.4 eV at room temperature and a melting point of 1460°C. It is insoluble in water and insoluble in other acids except concentrated sulfuric acid and hot hydrofluoric acid. Such properties expand the scope of application of niobium pentoxide. Nb 2 o 5 At room temperature, there is a hexagonal crystal system (H-Nb 2 o 5 ), orthorhombic system (O-Nb 2 o 5 ) and monoclinic (M-Nb 2 o 5 ), among which, the most thermodynamically stable form is the monoclinic system (M-Nb 2 o 5 ). Niobium pentoxide nanomaterials ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00B82Y40/00
CPCC01G33/00B82Y40/00C01P2002/72C01P2004/03C01P2004/04C01P2004/16C01P2004/17
Inventor 连加彪李圣远汪婷李华明
Owner JIANGSU UNIV
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