Preparation of hard nanoceramics of borides and functionalization of titania by metallothermic reduction method

Takahiro Ohkubo; Hideki Sakai; Masahiko Abe; Katsuhiro Nishiyama

doi:10.2497/jjspm.54.251

Preparation of hard nanoceramics of borides and functionalization of titania by metallothermic reduction method

Takahiro Ohkubo, Hideki Sakai, Masahiko Abe, Katsuhiro Nishiyama

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

Fine particles of TiB₂, ZrB₂, and HfB₂ were prepared by metallothermic reduction (MTR) of their oxides with Mg. As a result, we found that theory of function-building fine particle preparation was able to be applied to synthesize nano-atomized fine particles of borides. ZrB₂ can also be obtained directly from mixture of ZrSiO₄, B₂O₃, and Mg by MTR method. This sample has no borides such as silicon boride except for ZrB₂. Therefore, this result shows the possibility to obtain ZrB₂ easily from natural source. On the other hand, B doped TiO₂ samples were prepared by the calcination of TiB₂ in the air condition and MTR method. As a result, we could effectively dope B atoms to TiO₂ samples by this method. These samples also show the photocatalytic activity for the oxidation of 2-propanol even under the visible-light irradiation.

Original language	English
Pages (from-to)	251-259
Number of pages	9
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	54
Issue number	4
DOIs	https://doi.org/10.2497/jjspm.54.251
Publication status	Published - Apr 2007

Keywords

Function-building fine particle preparation
Metallothermic reduction
Photocatalyst

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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Ohkubo, T., Sakai, H., Abe, M., & Nishiyama, K. (2007). Preparation of hard nanoceramics of borides and functionalization of titania by metallothermic reduction method. Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, 54(4), 251-259. https://doi.org/10.2497/jjspm.54.251

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title = "Preparation of hard nanoceramics of borides and functionalization of titania by metallothermic reduction method",

abstract = "Fine particles of TiB2, ZrB2, and HfB2 were prepared by metallothermic reduction (MTR) of their oxides with Mg. As a result, we found that theory of function-building fine particle preparation was able to be applied to synthesize nano-atomized fine particles of borides. ZrB2 can also be obtained directly from mixture of ZrSiO4, B2O3, and Mg by MTR method. This sample has no borides such as silicon boride except for ZrB2. Therefore, this result shows the possibility to obtain ZrB2 easily from natural source. On the other hand, B doped TiO2 samples were prepared by the calcination of TiB2 in the air condition and MTR method. As a result, we could effectively dope B atoms to TiO2 samples by this method. These samples also show the photocatalytic activity for the oxidation of 2-propanol even under the visible-light irradiation.",

keywords = "Function-building fine particle preparation, Metallothermic reduction, Photocatalyst",

author = "Takahiro Ohkubo and Hideki Sakai and Masahiko Abe and Katsuhiro Nishiyama",

year = "2007",

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doi = "10.2497/jjspm.54.251",

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AU - Ohkubo, Takahiro

AU - Sakai, Hideki

AU - Abe, Masahiko

AU - Nishiyama, Katsuhiro

PY - 2007/4

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N2 - Fine particles of TiB2, ZrB2, and HfB2 were prepared by metallothermic reduction (MTR) of their oxides with Mg. As a result, we found that theory of function-building fine particle preparation was able to be applied to synthesize nano-atomized fine particles of borides. ZrB2 can also be obtained directly from mixture of ZrSiO4, B2O3, and Mg by MTR method. This sample has no borides such as silicon boride except for ZrB2. Therefore, this result shows the possibility to obtain ZrB2 easily from natural source. On the other hand, B doped TiO2 samples were prepared by the calcination of TiB2 in the air condition and MTR method. As a result, we could effectively dope B atoms to TiO2 samples by this method. These samples also show the photocatalytic activity for the oxidation of 2-propanol even under the visible-light irradiation.

AB - Fine particles of TiB2, ZrB2, and HfB2 were prepared by metallothermic reduction (MTR) of their oxides with Mg. As a result, we found that theory of function-building fine particle preparation was able to be applied to synthesize nano-atomized fine particles of borides. ZrB2 can also be obtained directly from mixture of ZrSiO4, B2O3, and Mg by MTR method. This sample has no borides such as silicon boride except for ZrB2. Therefore, this result shows the possibility to obtain ZrB2 easily from natural source. On the other hand, B doped TiO2 samples were prepared by the calcination of TiB2 in the air condition and MTR method. As a result, we could effectively dope B atoms to TiO2 samples by this method. These samples also show the photocatalytic activity for the oxidation of 2-propanol even under the visible-light irradiation.

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KW - Photocatalyst

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