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Silver tungstate nanowire and preparation method thereof

A technology of nanowires and silver tungstate, which is applied in chemical instruments and methods, tungsten compounds, inorganic chemistry, etc., can solve the problems of difficult recovery of silver tungstate, achieve nanowires with excellent shape, perfect shape, and low production cost Effect

Inactive Publication Date: 2017-01-18
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0003] The present invention solves the technical problem that the silver tungstate prepared by the existing method is difficult to recycle; and provides a silver tungstate nanowire and its preparation method

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  • Silver tungstate nanowire and preparation method thereof
  • Silver tungstate nanowire and preparation method thereof
  • Silver tungstate nanowire and preparation method thereof

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specific Embodiment approach 1

[0031] Specific embodiment one: select analytically pure sodium tungstate (Na 2 WO 4 ) and silver nitrate (AgNO 3 ) is the chemical raw material for synthesizing silver tungstate, after weighing the raw material according to the following stoichiometric ratio, it is prepared into solution respectively: Na 2 WO 4 +2AgNO 3 → Ag 2 WO 4 +2NaNO 3 . The preparation method of silver tungstate nanowires in the present embodiment is specifically completed through the following steps:

[0032] Step 1, while stirring, add 50ml of 0.01M silver nitrate solution dropwise to 50ml of 0.005M sodium tungstate solution (generally, the addition time is 15-20 minutes). The molar ratio of sodium tungstate to silver nitrate in the silver nitrate solution is 1:2, then dilute nitric acid (2% by mass) to adjust the pH to 2.5;

[0033] Step 2, then place the liner as a polytetrafluoroethylene (PTFE) reactor (the kettle material is chromium-nickel alloy (304II)), tighten the reactor with a bench...

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Abstract

The invention discloses silver tungstate nanowire and a preparation method thereof and belongs to the field of semiconductor photocatalysis materials and nano-materials. The invention aims to solve the technical problem that silver tungstate prepared by existing methods is hard to recover. The silver tungstate nanowire is prepared by using sodium tungstate and silver nitrate as main raw materials through a hydrothermal synthesis method. The preparation method of the invention comprises the following steps: stirring while dropwise adding a silver nitrate solution into a sodium tungstate solution, and adjusting pH value to 2.5-3 by the use of dilute nitric acid; putting the solution into a polytetrafluoroethylene-lined reaction vessel and carrying out a hydrothermal synthesis reaction; cooling after the hydrothermal reaction, opening the reaction vessel, fetching sediments, carrying out ultrasonic cleaning successively by the use of deionized water and anhydrous ethanol, and carrying out vacuum drying to obtain the silver tungstate nanowire. The invention is of great practical application significance and application value in photocatalytic degradation of environmental organic pollutants such as organic dye, etc.

Description

technical field [0001] The invention belongs to the field of semiconductor photocatalytic materials and nanometer materials; in particular, it relates to a silver tungstate nanowire with high-efficiency photocatalytic properties and a preparation method thereof. Background technique [0002] Energy crisis and environmental pollution have become urgent problems to be solved in countries all over the world. The development of semiconductor photocatalysis technology has opened up a new path to solve these two world-wide problems. Silver tungstate is a new type of photocatalytic material, and its material preparation and performance research has gradually become a hot spot in the field of photocatalysis. Silver tungstate is a semiconductor material with an optical bandgap of 3.2eV and a corresponding light absorption threshold wavelength of about 388nm. At present, the research on silver tungstate materials mainly focuses on the preparation and characterization of micro-particl...

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Application Information

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IPC IPC(8): C01G41/00
CPCC01G41/00C01P2002/72C01P2002/84C01P2004/03C01P2004/16
Inventor 刘丹青黄伟成李龙马壮刘波
Owner HARBIN UNIV OF SCI & TECH
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