Hollow TiO2:Sm3+ spheres with enhanced photoluminescence fabricated by a facile method using polystyrene as template

An, Guofei; Yang, Chuan; Jin, Shaohu; Chen, Guowei; Zhao, Xiaopeng

doi:10.1007/s10853-013-7342-5

Cited by 13 publications

(12 citation statements)

References 32 publications

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“…In the past two decades, our group has focused on the synthesis, electrorheological (ER) properties, luminescence properties and photocatalytic activities of TiO 2 -based materials [ 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. A series of TiO 2 -based materials with different compositions, crystallinity and interior microstructures have been synthesized by different methods [ 33 , 34 , 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

“…A series of TiO 2 -based materials with different compositions, crystallinity and interior microstructures have been synthesized by different methods [ 33 , 34 , 35 , 36 ]. The TiO 2 particles with a familiar microstructure, such as solid spheres [ 37 ], hollow spheres [ 29 ], porous spheres [ 28 , 38 ], hollow porous spheres [ 39 ] and urchin-like spheres [ 30 ], were synthesized and characterized in detail. In addition, some TiO 2 composites with a special interior microstructure were also designed and synthesized [ 40 , 41 , 42 , 43 ].…”

Section: Introductionmentioning

confidence: 99%

“…For example, the rare-earth-doped TiO 2 , and the micro- or nano-structured composites with TiO 2 have been demonstrated to show a distinct enhancement in their ER properties [ 44 , 50 , 51 , 52 ]. The hollow Sm 3+ -doped TiO 2 and the monodisperse mesoporous Eu-doped TiO 2 spheres have shown good luminescent performance [ 28 , 29 ]. The urchin-like TiO 2 and urchin-like TiO 2 decorated with Au, Ag, Co@Au or Co@Ag nanoparticles have shown significant improvement in photocatalytic activities [ 30 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

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Wet-Chemical Preparation of TiO2-Based Composites with Different Morphologies and Photocatalytic Properties

Xiang

Zhao

2017

Nanomaterials

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TiO2-based composites have been paid significant attention in the photocatalysis field. The size, crystallinity and nanomorphology of TiO2 materials have an important effect on the photocatalytic efficiency. The synthesis and photocatalytic activity of TiO2-based materials have been widely investigated in past decades. Based on our group’s research works on TiO2 materials, this review introduces several methods for the fabrication of TiO2, rare-earth-doped TiO2 and noble-metal-decorated TiO2 particles with different morphologies. We focused on the preparation and the formation mechanism of TiO2-based materials with unique structures including spheres, hollow spheres, porous spheres, hollow porous spheres and urchin-like spheres. The photocatalytical activity of urchin-like TiO2, noble metal nanoparticle-decorated 3D (three-dimensional) urchin-like TiO2 and bimetallic core/shell nanoparticle-decorated urchin-like hierarchical TiO2 are briefly discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wet-Chemical Preparation of TiO2-Based Composites with Different Morphologies and Photocatalytic Properties

Xiang

Zhao

2017

Nanomaterials

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“…For examples, core@PPy microspheres have been prepared for applications in biosensors, visual biomedical diagnostics, fuel cells, catalysis, and absorbers for electromagnetic waves [10][11][12][13][14][15][16][17][18][19]. In the literatures, the widely studied cores are silica and polystyrene (PS) microspheres [20][21][22][23][24][25][26][27]. Between them, the PS microspheres are recognized for a wider processing window, more freedoms in size availability and uniformity, as well as easier to be selectively removed by either chemical extraction or combustion.…”

Section: Introductionmentioning

confidence: 99%

Controlled synthesis of uniform hollow polypyrrole microcapsules by a cosolvent approach

et al. 2019

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A simple and effective synthetic approach is demonstrated for the formation of uniform hollow polypyrrole (PPy) microcapsules. This process entails the preparation of homogeneous polystyrene@polypyrrole (PS@PPy; core@shell) microspheres, followed by chemical extraction of the PS cores. By proper dispersion of monodispersive PS microspheres and pyrrole molecules in a water/ethanol cosolvent to minimize the diffusion of pyrrole molecules to the PS microspheres, we are able to prepare uniform PS@PPy microspheres with significantly reduced size variation, deformation, and aggregation. The PS microspheres, in diameter of 490 nm, carry negative surface charges, and after the deposition of PPy, reveal a transition from positive to negative surface charges with increasing pH values. The hollow PPy microcapsules, in diameter of 527 nm and shell thickness of 20 nm, are fabricated after selective removal of PS cores from the PS@PPy microspheres in tetrahydrofuran. Analysis tools including Fourier transform infrared spectroscopy, thermogravimetric analyzer, and zeta potential, as well as scanning and transmission electron microscopes are employed for material characterization.

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“…In recent years, there have been great interests in the preparation of functional micro/nanomaterials with controllable structure, dimensionality and size [4][5][6][7][8][9]. Different hosts and morphologies have been extensively researched to enhance the photoluminescence (PL) intensity of rare earth doped inorganic oxides, such as TiO 2 and Y 2 O 3 [10][11][12][13]. Specifically, Y 2 O 3 :Eu 3?…”

Section: Introductionmentioning

confidence: 99%

Facile preparation and fluorescence enhancement of mesoporous Eu-doped-Y2O3 phosphors

Chen

Tao

Yang

et al. 2015

J Mater Sci: Mater Electron

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Mesoporous europium-doped yttrium oxide phosphors were successfully synthesized by a simple Pechini sol-gel method. The prepared powders were characterized by X-ray diffraction, scanning electron microscopy, Surface area and pore size analyzer and fluorescence spectrophotometer. The XRD spectrum of the calcined samples confirm the presence of Y 2 O 3 . The surface area and pore size analyzer was employed to demonstrate the existence of mesoporous structure in these samples. The room temperature photoluminescence (PL) emissions of Y 2 O 3 :Eu samples can be observed under 245 nm excitation. PL results show that the emission intensity of as-prepared mesoporous Y 2 O 3 :Eu phosphors are higher than that of particles without special structures. Large surface area and pores play an important role in the increasing of PL intensity. The intensity ratio between 5 D 0 ? 7 F 2 and 5 D 0 ? 7 F 1 transitions which related to the local environment of Eu 3? were also studied.

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Hollow TiO2:Sm3+ spheres with enhanced photoluminescence fabricated by a facile method using polystyrene as template

Cited by 13 publications

References 32 publications

Wet-Chemical Preparation of TiO2-Based Composites with Different Morphologies and Photocatalytic Properties

Wet-Chemical Preparation of TiO2-Based Composites with Different Morphologies and Photocatalytic Properties

Controlled synthesis of uniform hollow polypyrrole microcapsules by a cosolvent approach

Facile preparation and fluorescence enhancement of mesoporous Eu-doped-Y2O3 phosphors

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