Sol-hydrothermal synthesis of TiO 2 :Sm 3+ nanoparticles and their enhanced photovoltaic properties

Qin, Yiying; Hu, Zhi‐Qiang; Lim, Boon-Han; Chang, Wen-Kuei; Chong, Kok‐Keong; Zhang, Putao; Zhang, Haitao

doi:10.1016/j.jallcom.2016.06.179

Cited by 20 publications

(16 citation statements)

References 32 publications

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“…The impact of the synthesis of TiO 2 nanoparticles (NPs) on properties and morphology is important for understanding, creating and improving materials for various applications. According to the literature, RE-modified TiO 2 could be prepared through a wide spectrum of methods, such as sol–gel [ 18 , 25 ], hydrothermal [ 23 , 26 – 27 ], solvothermal [ 28 ], electrospinning [ 29 ], co-precipitation [ 30 ] and electrochemical [ 8 ] methods.…”

Section: Introductionmentioning

confidence: 99%

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO₂

Parnicka

Mazierski

Grzyb

et al. 2018

Beilstein J. Nanotechnol.

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Nd-modified TiO2 photocatalysts have been obtained via hydrothermal (HT) and sol–hydrothermal (SHT) methods. The as-prepared samples were characterized by X-ray diffraction (XRD), BET surface area measurements, scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS), luminescence spectroscopy and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of the synthesized samples was evaluated by the degradation of phenol in aqueous solution under irradiation with UV–vis (λ > 350 nm) and vis (λ > 420 nm) light, as well as by the degradation of gaseous toluene under irradiation with vis (λmax = 415 nm) light. It was found that Nd-modified TiO2 is an efficient photocatalyst for the degradation of phenol and toluene under visible light. XPS analysis revealed that the photocatalyst prepared via HT method contains a three-times higher amount of hydroxy groups at the surface layer and a two-times higher amount of surface defects than that obtained by the SHT method. The photocatalytic efficiency of phenol and toluene degradation under vis irradiation in the presence of 0.25% Nd-TiO2(HT) reached 0.62 and 3.36 μmol·dm−1·min−1, respectively. Photocatalytic activity tests in the presence of Nd-TiO2 and scavenger confirm that superoxide radicals were responsible for the visible light-induced degradation of the model pollutant in aqueous solution.

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Section: Introductionmentioning

confidence: 99%

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO₂

Parnicka

Mazierski

Grzyb

et al. 2018

Beilstein J. Nanotechnol.

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“…Nano-materials doped with rare-earth (RE) ions are an important class of materials, for they present a broad range of applications, such as temperature sensors, solid-state lasers, optical amplifiers, lighting and displays, solar cells, labelling, and so on [1][2][3][4][5][6][7]. In particular, RE-doped oxyfluoride nano-glass-ceramics (nGCs) are currently being extensively investigated as blue or UV converting white light emitting diodes wLEDs in order to replace the traditional phosphors powder and organic resins, respectively [4,[8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Bright luminescence of Gd3+ sensitized RE3+-doped SiO2-BaGdF5 glass-ceramics for UV-LEDs colour conversion

Yanes

del-Castillo

2017

Journal of Alloys and Compounds

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RE-doped (Eu 3+ , Sm 3+ , Dy 3+ or Tb 3+) nano-glass-ceramics containing BaGdF 5 nanocrystals, have been successfully obtained under thermal treatment of precursor sol-gel glasses. X-ray diffraction, high-resolution transmission electron microscope images and energy dispersive X-ray spectroscopy measurements confirmed the precipitation and distribution of cubic BaGdF 5 nanocrystals (around 10 nm in size) in the glass matrix. The luminescent properties, via excitation and emission spectra along with decay curves, were studied. In order to complete the structural analysis, the luminescent features of Eu 3+ and Sm 3+ ions were also used as sensitive probes, confirming the distribution of a significant fraction of dopant ions into the fluoride nanocrystalline environment. Intense visible emissions were obtained through efficient energy transfer from Gd 3+ to RE ions, which leads to consider these materials as potential emitting phosphors for colour converted UV LEDs.

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“…Recently, we have carried out detailed study on the performance of Sm-doped TiO 2 substrate by varying the dopant concentration and amount of P25 used [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…Single doping of Sm 3+ was conducted on the photoanode by Qin et al[24], whilst co-doping Sm 3+ and Y 3+ were carried out on the blocking layer in this article.…”

mentioning

confidence: 99%

Performance improvement of dye-sensitized solar cell by introducing Sm3+/Y3+ co-doped TiO2 film as an efficient blocking layer

Qin

Lim

et al. 2017

Thin Solid Films

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Luminescence mediums: samarium ion and yttrium ion, were introduced to expand the photo-response region of TiO 2 by means of the down-conversion effect to convert ultraviolet light into visible light, offering a unique method to enhance the photovoltaic performance of dye-sensitized solar cells (DSSCs). Their crystal structures, optical properties as well as photovoltaic performance were investigated systematically. The result indicates that the DSSCs doped with a total molar ratio of 4 mol% of Sm 3+ and Y 3+ show an overall power conversion efficiency of 4.09%, which is equivalent to improvements of 17.52% and 16.2% as compared to the no blocking layer DSSCs and pure TiO 2 blocking layer DSSCs respectively. The improvement in conversion efficiency is attributed to the dual effects including down-conversion of ultraviolet light and reduction of electron-hole recombination rate.

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Sol-hydrothermal synthesis of TiO 2 :Sm 3+ nanoparticles and their enhanced photovoltaic properties

Cited by 20 publications

References 32 publications

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO₂

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO₂

Bright luminescence of Gd3+ sensitized RE3+-doped SiO2-BaGdF5 glass-ceramics for UV-LEDs colour conversion

Performance improvement of dye-sensitized solar cell by introducing Sm3+/Y3+ co-doped TiO2 film as an efficient blocking layer

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Sol-hydrothermal synthesis of TiO 2 :Sm 3+ nanoparticles and their enhanced photovoltaic properties

Cited by 20 publications

References 32 publications

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO2

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO2

Bright luminescence of Gd3+ sensitized RE3+-doped SiO2-BaGdF5 glass-ceramics for UV-LEDs colour conversion

Performance improvement of dye-sensitized solar cell by introducing Sm3+/Y3+ co-doped TiO2 film as an efficient blocking layer

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Influence of the preparation method on the photocatalytic activity of Nd-modified TiO₂

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO₂