Anatase-Type Ti1-2xNbxAlxO2 Solid Solution/Silica (SiO2) Composite Nanoparticles: Synthesis, Phase Stability, and Photocatalytic Performance

Anatase-Type Ti1-2xNbxAlxO2 Solid Solution/Silica (SiO2) Composite Nanoparticles: Synthesis, Phase Stability, and Photocatalytic Performance
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锐钛矿型 Ti1-2xNbxAlxO2 固溶体/二氧化硅 (SiO2) 复合纳米颗粒:合成、相稳定性和光催化性能

DOI:
10.4028/www.scientific.net/msf.654-656.2735
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发表时间:
2010
期刊:
Materials Science Forum
影响因子:
--
通讯作者:
N. Kuno
N. Kuno
中科院分区:
--
文献类型:
--
作者:
M. Hirano;N. Kuno

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在尿素存在下,以前驱体溶液为原料,在180 °C水热反应5 h,直接合成了锐钛矿型Ti 1 - 2XNbXAlXO 2固溶体/SiO2复合纳米粒子。在弱碱性水热条件下,尿素水解生成的复合纳米粒子中,随着二氧化硅含量的增加,纳米粒子的晶粒尺寸逐渐减小。组成为Ti0.9Nb0.05Al0.05O2/SiO2 = 100/10mol%的复合纳米粒子具有较好的光催化活性。通过与无定形二氧化硅形成复合纳米颗粒(Ti0.90Nb0.05Al0.05O2/SiO2 = 100/20摩尔%),在空气中加热过程中的锐钛矿到金红石相转变被延迟以保持锐钛矿型结构直到超过1050 °C而没有痕量的金红石相。
Composite nanoparticles (anatase-type Ti1-2XNbXAlXO2 solid solution/SiO2) were directly synthesized from precursor solutions in the presence of urea under mild hydrothermal conditions at 180 °C for 5 h. The crystallite size of anatase was gradually decreased with increased silica content in the composite nanoparticles formed under weakly basic hydrothermal conditions via the hydrolysis of urea. The composite nanoparticles with composition Ti0.9Nb0.05Al0.05O2/SiO2 = 100/10 mol% showed good photocatalytic activity. The anatase-to-rutile phase transformation in the course of heating in air was retarded to maintain the anatase-type structure up to more than 1050 °C without a trace of rutile phase by the formation of composite nanoparticles (Ti0.90Nb0.05Al0.05O2/SiO2 = 100/20 mol%) with amorphous silica.
水热条件下锐钛矿型二氧化钛(TiO_2)固溶体纳米粒子的形成
DOI: --
发表时间: 2007
期刊: Bull. Res. Inst. Ind. Tech. AIT 9
影响因子: --
作者:
M. Hirano;T. Ito;K. Matsushima;K. Date
通讯作者: K. Date