Characterization of oxides obtained by heating a mixture of peroxoniobic acid and peroxotitanic acid.
Characterization of oxides obtained by heating a mixture of peroxoniobic acid and peroxotitanic acid.
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通过加热过氧铌酸和过氧钛酸的混合物获得的氧化物的表征。
DOI：
10.1039/c0dt00980f
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发表时间：
2011
影响因子：
4
通讯作者：
K. Kakegawa
中科院分区：
文献类型：
--
作者：
N. Uekawa;Y. Oosawa;T. Kojima;K. Kakegawa
以过氧钛酸和过氧铌酸为原料，在空气中加热制备了Nb掺杂的TiO 2纳米粒子。当加热温度高于1173 K时，得到的主要物相为金红石型TiO（2），沿着少量TiNb（2）O（7）。所得金红石型TiO（2）的晶格常数与Nb/（Ti + Nb）的摩尔分数有关。在过氧化合物用作前体的情况下，与醇盐方法相比，在较低的X（Nb）范围内观察到金红石TiO（2）的晶格参数的变化。结果表明，掺杂的Nb（5+）离子在金红石型TiO（2）晶格中的均匀分散是通过过氧化合物实现的。此外，通过使用过氧化合物获得的氧化物颗粒具有较低的载流子电子活化能（E（a））和氧空位，即使加热过程在空气中进行。紫外-可见吸收光谱和拉曼光谱表明，作为还原剂，TiO（2）晶格中O（2）（2-）离子的分解反应主要是O（2）（2-）→ O（2）+2 e（-）。
Nb-doped TiO(2) particles were prepared by heating a mixture of peroxotitanic acid and peroxoniobic acid in air. When the heating temperature was more than 1173 K, the dominant phase obtained was rutile TiO(2), along with a small amount of TiNb(2)O(7). The relationship between the lattice parameters of the obtained rutile TiO(2) depended on the molar fraction of Nb/(Ti + Nb). In the case where peroxo compounds were used as a precursor, a change in the lattice parameters of the rutile TiO(2) was observed within the lower X(Nb) range, as compared to the alkoxide method. The results indicate that a homogeneous dispersion of doped Nb(5+) ions in the obtained rutile TiO(2) lattice was achieved by using peroxo compounds. Furthermore, the oxide particles obtained by using peroxo compounds had a lower activation energy of the carrier electrons (E(a)) and oxygen vacancies, even though the heating procedure was carried out in air. The UV-vis absorption spectra and Raman spectra of the obtained oxide particles indicated that the dominant reaction of the decomposition of O(2)(2-) ions in the TiO(2) lattice was O(2)(2-)→ O(2) + 2e(-) as a reducing agent.
影响因子：
3.2
作者：
S. Yin;H. Yamaki;Qiwu Zhang;M. Komatsu;Jinshu Wang;Q. Tang;F. Saito;Tsugio Sato
通讯作者：
S. Yin;H. Yamaki;Qiwu Zhang;M. Komatsu;Jinshu Wang;Q. Tang;F. Saito;Tsugio Sato
影响因子：
15
作者：
NAZEERUDDIN, MK;KAY, A;GRATZEL, M
通讯作者：
GRATZEL, M
DOI：
10.1016/s1010-6030(03)00289-2
发表时间：
2004-04-15
影响因子：
4.3
作者：
Yin, S;Hasegawa, H;Sato, T
通讯作者：
Sato, T