Synthesis and photocatalytic activity of small brookite particles by self-hydrolysis of TiOCl2

Miki Inada, Kazunori Iwamoto, Naoya Enomoto, Junichi Hojo

研究成果: ジャーナルへの寄稿記事

14 引用 (Scopus)

抄録

The preparation of brookite particles was tried by self-hydrolysis of TiOCl2 with HCl addition. When 0.1M TiOCl2 solution was heated at 100°C by reflux method, the precipitate was obtained within 15min and was identified as brookite and anatase. By addition of HCl, the starting time of precipitation was delayed and small brookite formed beside rutile large rod particles. These results suggest that deprotonation at the early stage of reaction was suppressed but crystal growth at the late stage was promoted because of an increase in the solubility of TiO2 sols. When the TiOCl2 solution was heated at 100°C for 24 h in autoclave, rutile large particles and brookite small particles formed separately. The small brookite particles could be separated by centrifugation. The photocatalytic activity of synthesized brookite particles was lower compared to commercial brookite particles. When hydrothermal treatment was carried out for synthesized brookite, the photocatalytic activity was enhanced. This was due to improvement of crystallinity of brookite.

元の言語英語
ページ(範囲)451-455
ページ数5
ジャーナルJournal of the Ceramic Society of Japan
119
発行部数1390
DOI
出版物ステータス出版済み - 1 1 2011

Fingerprint

hydrolysis
Hydrolysis
Deprotonation
Centrifugation
Autoclaves
synthesis
Sols
Crystal growth
Titanium dioxide
Precipitates
Solubility
rutile
autoclaves
titanium dioxide
anatase
crystal growth
precipitates
crystallinity
rods
solubility

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

これを引用

Synthesis and photocatalytic activity of small brookite particles by self-hydrolysis of TiOCl2 . / Inada, Miki; Iwamoto, Kazunori; Enomoto, Naoya; Hojo, Junichi.

:: Journal of the Ceramic Society of Japan, 巻 119, 番号 1390, 01.01.2011, p. 451-455.

研究成果: ジャーナルへの寄稿記事

Inada, Miki ; Iwamoto, Kazunori ; Enomoto, Naoya ; Hojo, Junichi. / Synthesis and photocatalytic activity of small brookite particles by self-hydrolysis of TiOCl2 :: Journal of the Ceramic Society of Japan. 2011 ; 巻 119, 番号 1390. pp. 451-455.
@article{6a452c5475b8444e944b034c0f649852,
title = "Synthesis and photocatalytic activity of small brookite particles by self-hydrolysis of TiOCl2",
abstract = "The preparation of brookite particles was tried by self-hydrolysis of TiOCl2 with HCl addition. When 0.1M TiOCl2 solution was heated at 100°C by reflux method, the precipitate was obtained within 15min and was identified as brookite and anatase. By addition of HCl, the starting time of precipitation was delayed and small brookite formed beside rutile large rod particles. These results suggest that deprotonation at the early stage of reaction was suppressed but crystal growth at the late stage was promoted because of an increase in the solubility of TiO2 sols. When the TiOCl2 solution was heated at 100°C for 24 h in autoclave, rutile large particles and brookite small particles formed separately. The small brookite particles could be separated by centrifugation. The photocatalytic activity of synthesized brookite particles was lower compared to commercial brookite particles. When hydrothermal treatment was carried out for synthesized brookite, the photocatalytic activity was enhanced. This was due to improvement of crystallinity of brookite.",
author = "Miki Inada and Kazunori Iwamoto and Naoya Enomoto and Junichi Hojo",
year = "2011",
month = "1",
day = "1",
doi = "10.2109/jcersj2.119.451",
language = "English",
volume = "119",
pages = "451--455",
journal = "Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan",
issn = "1882-0743",
publisher = "Ceramic Society of Japan/Nippon Seramikkusu Kyokai",
number = "1390",

}

TY - JOUR

T1 - Synthesis and photocatalytic activity of small brookite particles by self-hydrolysis of TiOCl2

AU - Inada, Miki

AU - Iwamoto, Kazunori

AU - Enomoto, Naoya

AU - Hojo, Junichi

PY - 2011/1/1

Y1 - 2011/1/1

N2 - The preparation of brookite particles was tried by self-hydrolysis of TiOCl2 with HCl addition. When 0.1M TiOCl2 solution was heated at 100°C by reflux method, the precipitate was obtained within 15min and was identified as brookite and anatase. By addition of HCl, the starting time of precipitation was delayed and small brookite formed beside rutile large rod particles. These results suggest that deprotonation at the early stage of reaction was suppressed but crystal growth at the late stage was promoted because of an increase in the solubility of TiO2 sols. When the TiOCl2 solution was heated at 100°C for 24 h in autoclave, rutile large particles and brookite small particles formed separately. The small brookite particles could be separated by centrifugation. The photocatalytic activity of synthesized brookite particles was lower compared to commercial brookite particles. When hydrothermal treatment was carried out for synthesized brookite, the photocatalytic activity was enhanced. This was due to improvement of crystallinity of brookite.

AB - The preparation of brookite particles was tried by self-hydrolysis of TiOCl2 with HCl addition. When 0.1M TiOCl2 solution was heated at 100°C by reflux method, the precipitate was obtained within 15min and was identified as brookite and anatase. By addition of HCl, the starting time of precipitation was delayed and small brookite formed beside rutile large rod particles. These results suggest that deprotonation at the early stage of reaction was suppressed but crystal growth at the late stage was promoted because of an increase in the solubility of TiO2 sols. When the TiOCl2 solution was heated at 100°C for 24 h in autoclave, rutile large particles and brookite small particles formed separately. The small brookite particles could be separated by centrifugation. The photocatalytic activity of synthesized brookite particles was lower compared to commercial brookite particles. When hydrothermal treatment was carried out for synthesized brookite, the photocatalytic activity was enhanced. This was due to improvement of crystallinity of brookite.

UR - http://www.scopus.com/inward/record.url?scp=79958028920&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79958028920&partnerID=8YFLogxK

U2 - 10.2109/jcersj2.119.451

DO - 10.2109/jcersj2.119.451

M3 - Article

AN - SCOPUS:79958028920

VL - 119

SP - 451

EP - 455

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 - 1882-0743

IS - 1390

ER -