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Process for synthesizing silver vanadium oxide

A technology of silver vanadium oxide, synthesis method, applied in vanadium compounds, chemical instruments and methods, chemical/physical/physical chemical process of applying energy, etc. problem, to achieve the effect of wide suitable temperature range, excellent product performance and thorough reaction

Inactive Publication Date: 2004-12-15
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method has its obvious disadvantages: ① Since silver nitrate is decomposed by light, it must be completely protected from light during the reaction, otherwise the product phase is impure, making it difficult to target the target product, which brings inconvenience to the actual operation process and is not conducive to industrial production.
②Because no effective measures are taken to speed up the reaction, the complete reaction time may be as long as several months

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: to 42.1 grams containing V 2 o 5 The vanadium pentoxide hydrate (V 2 o 5 ·nH 2 O) Add 213.2 mg of Ag 2 O powder, and then ultrasonically dispersed for half an hour to obtain a sol with uniform composition and good dispersion; place the sol in an air atmosphere at 150°C for 10 hours, and obtain amorphous Ag after grinding. 1.2 V 3 o 8 .

Embodiment 2

[0010] Embodiment 2: to 38.95 grams containing V 2 o 5 The vanadium pentoxide hydrate (V 2 o 5 ·nH 2 O) Add 197.2 mg of Ag 2 O powder, and then ultrasonically dispersed for half an hour to obtain a sol with uniform composition and good dispersion; place the sol at 250°C for 8 hours in an air atmosphere, and after grinding, Ag with a lower crystallinity can be obtained. 1.2 V 3 o 8 .

Embodiment 3

[0011] Embodiment 3: to 42.9 grams containing V 2 o 5 The vanadium pentoxide hydrate (V 2 o 5 ·nH 2 O) Add 217.2 mg of Ag 2 O powder, and then stir and disperse for half an hour to obtain a sol with uniform composition and good dispersion; heat the sol at 450 °C for 6 hours in an oxygen atmosphere, and obtain Ag with higher crystallinity after grinding 1.2 V 3 o 8 .

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PUM

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Abstract

A process for synthesizing the silver vanadium oxide includes adding Ag2O powder to V2O5.nH2O, ultrasonic dispersing or stirring for 30 min to obtain sol, ehat treating at 150-450 deg.C in air for several hrs, and grinding. Its advantages are short period of prepn. excellent performance and wide temp range.

Description

technical field [0001] The invention relates to a synthesis method of silver vanadium oxide. Background technique [0002] Silver-vanadium-oxygen compounds (SVO) are various and widely used, covering organic reaction catalysts, lithium-ion battery cathode materials and many other fields. There are many synthetic methods about this class of compounds, but basically based on the following two types of reaction mechanisms: a class is silver oxide (Ag 2 O) and vanadium pentoxide (V 2 o 5 ) synthesis reaction mechanism; the other is silver nitrate (AgNO 3 ) and ammonium metavanadate (NH 4 VO 3 ) decomposition reaction mechanism. These two types of reactions are high-temperature solid-phase reactions, and the solid-phase reactants need to be fully mixed and ground evenly before the reaction, so the equipment investment is large and the loss is also large. Due to the sensitivity of silver compounds to light and heat, the synthesis reaction has almost strict requirements on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/08C01G1/02C01G31/00
Inventor 谢静刚周运鸿詹晖李金霞
Owner WUHAN UNIV