Synthesis of amorphous vanadium oxide from metal alkoxide

Sayuri Hioki, Tomoji Ohishi, Ken Takahashi, Tetsuo Nakazawa

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Amorphous vanadium oxides were synthesized by the hydrolysis of tri-n-butoxy vanadyl, and three types of products, gel, green precipitates and red precipitates were obtained. These products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared absorption spectroscopy (IR), thermogravimetric-differential thermal analysis (TG-DTA) and chemical analysis. Properties of the products were correlated to the synthesis conditions, and the mechanisms of the formation of each product are proposed. (1) Gel has a network structure. It is formed when hydrolysis followed by condensation proceeds on three substitutional groups of tri-n-butoxy vanadile, (2) green precipitates are formed when the condensation reaction is inhibited. They are the aggregates of particles with small molecular weights and have short structure units with hydroxide groups at their ends, (3) red precipitates are caused by insufficient proceeding of hydrolysis. They have many alkoxy groups in their structure units and their molecular weights are between those of gels and green precipitates.

Original languageEnglish
Pages (from-to)628-633
Number of pages6
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume97
Issue number6
Publication statusPublished - 1989
Externally publishedYes

Fingerprint

Vanadium
vanadium oxides
alkoxides
Oxides
Precipitates
precipitates
Metals
hydrolysis
synthesis
Hydrolysis
metals
Gels
gels
products
molecular weight
condensation
Molecular weight
Condensation reactions
Vanadates
Infrared absorption

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Synthesis of amorphous vanadium oxide from metal alkoxide. / Hioki, Sayuri; Ohishi, Tomoji; Takahashi, Ken; Nakazawa, Tetsuo.

In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 97, No. 6, 1989, p. 628-633.

Research output: Contribution to journalArticle

@article{d968dca496e34f5385b2833334035f3b,
title = "Synthesis of amorphous vanadium oxide from metal alkoxide",
abstract = "Amorphous vanadium oxides were synthesized by the hydrolysis of tri-n-butoxy vanadyl, and three types of products, gel, green precipitates and red precipitates were obtained. These products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared absorption spectroscopy (IR), thermogravimetric-differential thermal analysis (TG-DTA) and chemical analysis. Properties of the products were correlated to the synthesis conditions, and the mechanisms of the formation of each product are proposed. (1) Gel has a network structure. It is formed when hydrolysis followed by condensation proceeds on three substitutional groups of tri-n-butoxy vanadile, (2) green precipitates are formed when the condensation reaction is inhibited. They are the aggregates of particles with small molecular weights and have short structure units with hydroxide groups at their ends, (3) red precipitates are caused by insufficient proceeding of hydrolysis. They have many alkoxy groups in their structure units and their molecular weights are between those of gels and green precipitates.",
author = "Sayuri Hioki and Tomoji Ohishi and Ken Takahashi and Tetsuo Nakazawa",
year = "1989",
language = "English",
volume = "97",
pages = "628--633",
journal = "Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan",
issn = "0914-5400",
publisher = "Ceramic Society of Japan/Nippon Seramikkusu Kyokai",
number = "6",

}

TY - JOUR

T1 - Synthesis of amorphous vanadium oxide from metal alkoxide

AU - Hioki, Sayuri

AU - Ohishi, Tomoji

AU - Takahashi, Ken

AU - Nakazawa, Tetsuo

PY - 1989

Y1 - 1989

N2 - Amorphous vanadium oxides were synthesized by the hydrolysis of tri-n-butoxy vanadyl, and three types of products, gel, green precipitates and red precipitates were obtained. These products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared absorption spectroscopy (IR), thermogravimetric-differential thermal analysis (TG-DTA) and chemical analysis. Properties of the products were correlated to the synthesis conditions, and the mechanisms of the formation of each product are proposed. (1) Gel has a network structure. It is formed when hydrolysis followed by condensation proceeds on three substitutional groups of tri-n-butoxy vanadile, (2) green precipitates are formed when the condensation reaction is inhibited. They are the aggregates of particles with small molecular weights and have short structure units with hydroxide groups at their ends, (3) red precipitates are caused by insufficient proceeding of hydrolysis. They have many alkoxy groups in their structure units and their molecular weights are between those of gels and green precipitates.

AB - Amorphous vanadium oxides were synthesized by the hydrolysis of tri-n-butoxy vanadyl, and three types of products, gel, green precipitates and red precipitates were obtained. These products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared absorption spectroscopy (IR), thermogravimetric-differential thermal analysis (TG-DTA) and chemical analysis. Properties of the products were correlated to the synthesis conditions, and the mechanisms of the formation of each product are proposed. (1) Gel has a network structure. It is formed when hydrolysis followed by condensation proceeds on three substitutional groups of tri-n-butoxy vanadile, (2) green precipitates are formed when the condensation reaction is inhibited. They are the aggregates of particles with small molecular weights and have short structure units with hydroxide groups at their ends, (3) red precipitates are caused by insufficient proceeding of hydrolysis. They have many alkoxy groups in their structure units and their molecular weights are between those of gels and green precipitates.

UR - http://www.scopus.com/inward/record.url?scp=0024867249&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024867249&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0024867249

VL - 97

SP - 628

EP - 633

JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan

JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan

SN - 0914-5400

IS - 6

ER -