Optimizing TiO2 through Water-Soluble Ti Complexes as Raw Material for Controlling Particle Size and Distribution of Synthesized BaTiO3 Nanocubes

被引：6

作者：

Nakashima, Kouichi ^{[1
]}

Hironaka, Kouta ^{[1
]}

Oouchi, Kazuma ^{[1
]}

Ajioka, Mao ^{[2
]}

Kobayashi, Yoshio ^{[1
]}

Yoneda, Yasuhiro ^{[3
]}

Yin, Shu ^{[4
]}

Kakihana, Masato ^{[5
]}

Sekino, Tohru ^{[5
]}

机构：

[1] Ibaraki Univ, Grad Sch Sci & Engn, Dept Mat Sci & Engn, Hitachi, Ibaraki 3168511, Japan

[2] Ibaraki Univ, Coll Engn, Dept Biomol Funct Engn, Hitachi, Ibaraki 3168511, Japan

[3] Japan Atom Energy Agcy, React Dynam Res Div, Sayo, Hyogo 6795148, Japan

[4] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[5] Osaka Univ, SANKEN Inst Sci & Ind Res, Ibaraki, Osaka 5670047, Japan

来源：

ACS OMEGA | 2021年 / 6卷 / 48期

关键词：

HYDROTHERMAL SYNTHESIS; TITANIUM-DIOXIDE; CRYSTAL-GROWTH; PHOTOCATALYTIC ACTIVITY; SURFACE; OXIDATION; RUTILE; ACID; RECONSTRUCTION; NANOPARTICLES;

D O I：

10.1021/acsomega.1c04013

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Barium titanate (BaTiO3) nanocubes with a narrow particle size distribution were synthesized using a three-step approach. First, a water-soluble Ti complex was synthesized using a hydrolysis method. Next, the titanium dioxide (TiO2) raw material was synthesized via a hydrothermal method using various water-soluble titanium (Ti) complexes. The TiO2 exhibited various particle sizes and crystal structures (anatase, rutile, or brookite) depending on the water-soluble Ti complex and the hydrothermal conditions used in its synthesis. Finally, BaTiO3 nanocubes were subsequently created through a hydrothermal method using the synthesized TiO2 particles and barium hydroxide octahydrate [Ba(OH)(2)center dot 8H(2)O] as raw materials. The present study clarifies that the particle size of the BaTiO3 nanocubes depends on the particle size of the TiO2 raw material. BaTiO3 particles with a narrow size distribution were obtained when the TiO2 particles exhibited a narrow size distribution. We found that the best conditions for the creation of BaTiO3 nanocubes using TiO2 involved using lactic acid as a complexing agent, which resulted in a particle size of 166 nm on average. This particle size is consistent with an average of the width of the cubes measured from corner to corner diagonally, which corresponds to a side length of 117 nm. In addition, surface reconstruction of the BaTiO3 was clarified via electron microscopy observations, identifying the outermost surface as a Ti layer. Electron tomography using high-angle annular dark-field (HAADF)-scanning transmission electron microscopy (STEM) confirmed the three-dimensional (3D) structure of the obtained BaTiO3 nanocubes.

引用

页码：32517 / 32527

页数：11