Method for preparing spherical AgCl/W18O49 composite material

A technology of W18O49 and composite materials, which is applied in the field of preparing spherical AgCl/W18O49 composite materials, can solve the problems of low product purity, high sintering temperature, and long holding time, and achieve uniform chemical composition, low reaction temperature, and easy control of the process Effect

Active Publication Date: 2015-12-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid-phase synthesis method has higher sintering temperature, longer holding time, and lower product purity
The wet synthesis method is complicated, involves high temperature and high pressure, requires high equipment, good sealing performance, and the most important thing is safety.

Method used

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  • Method for preparing spherical AgCl/W18O49 composite material
  • Method for preparing spherical AgCl/W18O49 composite material
  • Method for preparing spherical AgCl/W18O49 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Weigh 0.7931g analytically pure WCl 6 , Prepare 0.05mol / L solution A with 40mL absolute ethanol.

[0030] 2) Weigh 0.1132g of analytically pure AgNO in A solution 3 , making AgNO 3 and WCl 6 The ratio of the amount of the substances is 1:3, and the solution B is obtained.

[0031] 3) Seal solution B with plastic wrap to avoid contact with air, stir with a magnetic stirrer for 30 minutes, and treat with ultrasonic (80Hz) for 20 minutes

[0032] 4) Pour the homogeneously mixed solution B into a 100mL polytetrafluoroethylene-lined autoclave, keeping the volume filling ratio at 40%.

[0033] 5) Feed 20min of N into the reactor 2 To reduce the oxygen in the reactor.

[0034] 6) Put the sealed reaction kettle into the homogeneous hydrothermal reactor, set the temperature parameter to 160° C., and the reaction time to 24 hours.

[0035] 7) Cool to room temperature after the reaction, and centrifuge and wash the final reactant three times with absolute ethanol. The c...

Embodiment 2

[0039] 1) Weigh 0.3569g analytically pure WCl 6 , Prepare 0.03mol / L solution A with 30mL absolute ethanol.

[0040] 2) Weigh 0.1529g analytically pure AgNO in A solution 3 , making AgNO 3 and WCl 6 The ratio of the amounts of substances is 1:1 to obtain solution B.

[0041] 3) Seal solution B with plastic wrap to avoid contact with air, stir with a magnetic stirrer for 20 minutes, and treat with ultrasonic (60Hz) for 30 minutes

[0042] 4) Pour the homogeneously mixed solution B into a 100mL polytetrafluoroethylene-lined autoclave, keeping the volume filling ratio at 30%.

[0043] 5) Feed 30min of N into the reactor 2 To reduce the oxygen in the reactor.

[0044] 6) Put the sealed reactor into a homogeneous hydrothermal reactor, set the temperature parameter to 150° C., and the reaction time to 18 hours.

[0045] 7) Cool to room temperature after the reaction, and centrifuge and wash the final reactant three times with absolute ethanol. Put the centrifuged material int...

Embodiment 3

[0048] 1) Weigh 1.9035g analytically pure WCl 6 , Prepare 0.03mol / L solution A with 30mL absolute ethanol.

[0049] 2) Weigh 0.1631g of analytically pure AgNO in A solution 3 , making AgNO 3 and WCl 6 The ratio of the amount of substances is 1:5 to obtain solution B.

[0050] 3) Seal solution B with plastic wrap to avoid contact with air, stir with a magnetic stirrer for 40 minutes, and treat with ultrasonic (80Hz) for 20 minutes

[0051] 4) Pour the homogeneously mixed solution B into a 100mL polytetrafluoroethylene-lined autoclave, keeping the volume filling ratio at 30%.

[0052] 5) Feed 20min of N into the reactor 2 To reduce the oxygen in the reactor.

[0053] 6) Put the sealed reactor into a homogeneous hydrothermal reactor, set the temperature parameter to 170° C., and the reaction time to 25 hours.

[0054] 7) Cool to room temperature after the reaction, and centrifuge and wash the final reactant three times with absolute ethanol. The centrifuged material was d...

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Abstract

A method for preparing spherical AgCl/W18O49 composite material includes: pouring solution containing AgNO3 and WCl6 into a high-pressure reaction kettle, feeding nitrogen into the high-pressure reaction kettle to reduce oxygen in the reaction kettle, placing the sealed reaction kettle into a homogeneous reactor, reacting under 150-180 DEG C, cooling to room temperature after the reaction, separating, and drying. The method has the advantages that the self-assembling spherical AgCl/W18O49 prepared by the method is microcrystal-shaped, uniform in chemical component, high in purity and uniform in morphological structure, and the AgCl/W18O49 is of a loose structure formed by the self-assembling of nanowires with the diameter of 0.4-1 micrometers; the product is high in methylene blue absorption performance; the method is low in reaction temperature, mild in reaction condition, low in energy consumption, easy to realize, simple in preparation process, low in cost, easy in process control and short in preparation cycle.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a method for preparing spherical AgCl / W 18 o 49 Composite method. Background technique [0002] Tungsten oxide has a variety of existing forms and crystal structures, and its existing forms include WO with a stoichiometric ratio 3 and non-stoichiometric W 18 o 49 (WO 2.72 ), W 5 o 14 (WO 2.8 ), W 24 o 68 (WO 2.83 ) and W 20 o 58 (WO 2.9 ), its general chemical formula is WO 3-x (x=0~1). non-stoichiometric WO 3-x The color is yellow-green depending on the oxygen content. It is an important multifunctional n-type wide bandgap (2.5-3.6eV) semiconductor. It exhibits many unique properties and has potential applications. For example, due to tungsten oxide Due to its electrochromic, photochromic and aerochromic properties, it can be widely used in the fields of flat panel displays, smart windows and various sensors. [0003] In 2012, Japanese scholar Ye Ji...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/132B01J20/06B01J35/10A62D3/17B82Y30/00B82Y40/00A62D101/26A62D101/28
Inventor 黄剑锋海国娟介燕妮曹丽云李嘉胤吴建鹏孔新刚卢靖张博
Owner SHAANXI UNIV OF SCI & TECH
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