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

被引：12

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.

引用

页码：4029 / 4042

页数：14

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