Cerium-doped mesoporous BaTiO3/TiO2 nanocomposites: structural, optical and photocatalytic properties

被引：11
作者：
Khalyavka, T. A. [1 ]
Shcherban, N. D. [2 ]
Shymanovska, V. V. [3 ]
Manuilov, E. V. [3 ]
Permyakov, V. V. [4 ]
Shcherbakov, S. N. [5 ]
机构：
[1] NAS Ukraine, Inst Sorpt & Problems Endoecol, Gen Naumov Str 13, UA-03164 Kiev, Ukraine
[2] NAS Ukraine, LV Pisarzhevskii Inst Phys Chem, Prospekt Nauky 31, UA-03028 Kiev, Ukraine
[3] NAS Ukraine, Inst Phys, 46 Nauki Ave, UA-03028 Kiev, Ukraine
[4] NAS Ukraine, Inst Geol Sci, O Gonchar Str 55-B, UA-01054 Kiev, Ukraine
[5] NAS Ukraine, MG Kholodny Inst Bot, Tereshenkivska Str 2,MSP-1, UA-01601 Kiev, Ukraine
来源：
RESEARCH ON CHEMICAL INTERMEDIATES | 2019年 / 45卷 / 08期
关键词：
TiO2; Cerium; BaTiO3; Nanocomposites; Photocatalysis; TITANIUM-DIOXIDE; TIO2; NANOPARTICLES; DESTRUCTION; DEGRADATION; COMPOSITE; ANATASE; SURFACE; CARBON; RUTILE;
D O I：
10.1007/s11164-019-03888-z
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Nanoscale composite materials based on cerium, barium titanate and titanium dioxide were synthesized by thermal hydrolysis. The obtained individual TiO2, BaTiO3 and as-synthesized Ce/xBaTiO(3)/TiO2 semiconductive nanocomposites were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive spectrometry, transmission electron microscopy, nitrogen adsorption-desorption, UV-vis diffuse reflectance spectroscopy, and Fourier transform infrared spectroscopy. The structural investigations revealed that all prepared powders were nanocrystalline with an average crystallite size within the range of 5-17nm. Analysis of nitrogen adsorption-desorption isotherms for the synthesized nanocomposites showed the presence of a hysteresis loop, which is evidence for the mesoporous structure of the powders. The photocatalytic degradation of the model pollutants (SafranineT and Rhodamine B) was carried out under UV irradiation. Ce/xBaTiO(3)/TiO2 nanocomposites showed higher photocatalytic activity compared to pure TiO2 and BaTiO3 as well as BaTiO3/TiO2. An increase of the amount of BaTiO3 in Ce/xBaTiO(3)/TiO2 samples by more than 12% reduces the photocatalytic activity of nanocomposites while doping of BaTiO3/TiO2 samples with cerium increases their photoactivity.
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收藏
页码：4029 / 4042
页数：14
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