Enhanced photocatalytic activity of C@ZnO core-shell nanostructures and its photoluminescence property

Au@ZnO core–shell nanostructures with increased ultraviolet photoluminescence emissions present remarkably enhanced ultraviolet photocatalytic properties, based on bidirectional electron transfer between Au and ZnO.

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Dye-sensitized Pt@TiO2 core–shell nanostructures for the efficient photocatalytic generation of hydrogen

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.5.41 ◽

2014 ◽

Vol 5 ◽

pp. 360-364 ◽

Cited By ~ 13

Author(s):

Jun Fang ◽

Lisha Yin ◽

Shaowen Cao ◽

Yusen Liao ◽

Can Xue

Keyword(s):

Photocatalytic Activity ◽

High Photocatalytic Activity ◽

Shell Structures ◽

Core Shell ◽

Synergic Effect ◽

Proton Reduction ◽

Dye Sensitization ◽

Dye Sensitized ◽

Shell Nanostructures ◽

Photogenerated Electrons

Pt@TiO2 core–shell nanostructures were prepared through a hydrothermal method. The dye-sensitization of these Pt@TiO2 core–shell structures allows for a high photocatalytic activity for the generation of hydrogen from proton reduction under visible-light irradiation. When the dyes and TiO2 were co-excited through the combination of two irradiation beams with different wavelengths, a synergic effect was observed, which led to a greatly enhanced H2 generation yield. This is attributed to the rational spatial distribution of the three components (dye, TiO2, Pt), and the vectored transport of photogenerated electrons from the dye to the Pt particles via the TiO2 particle bridge.

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Preparation and Characterization of SiO2/TiO2-Pt Core/Shell Nanostructures and Evaluation of Their Photocatalytic Activity

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2009.j021 ◽

2009 ◽

Vol 9 (1) ◽

pp. 177-184 ◽

Cited By ~ 3

Author(s):

Gang Li ◽

Likui Wang ◽

Lu Lv ◽

X. S. Zhao

Keyword(s):

Photocatalytic Activity ◽

Core Shell ◽

Shell Nanostructures

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Effect of calcination atmosphere on structural, optical and photocatalytic activity of TiO2/SnS2 core-shell nanostructures in the reduction of aqueous Cr(VI) to Cr(III)

Processing and Application of Ceramics ◽

10.2298/pac2101058s ◽

2021 ◽

Vol 15 (1) ◽

pp. 58-68

Author(s):

Shalini Sikdar ◽

Tiju Thomas ◽

Rao Ramachandra ◽

Subramshu Bhattacharya

Keyword(s):

Photocatalytic Activity ◽

Single Step ◽

Visible Range ◽

Core Shell ◽

Shell Nanoparticles ◽

The Core ◽

Shell Nanostructures ◽

Important Means ◽

Calcination Atmosphere ◽

Core Shell Nanoparticles

Conversion of Cr(VI) to Cr(III) in mitigating pollution of water bodies is of significant importance to public health due to the fact that Cr(VI) is known to be a potent carcinogen, while Cr(III) is relatively low in toxicity. Photocatalytic approaches are considered as important means to achieve this reduction. Here, TiO2/SnS2 core-shell nanostructures have been produced using a single-step hydrothermal method and its photocatalytic activity is tested for the reduction of aqueous Cr(VI). The structural and optical properties of the as-synthesized products are characterized by XRD, HRTEM, Raman, FTIR, XPS and DRS techniques. The present work reveals that by calcining the core-shell nanoparticles in Ar atmosphere a defective Ti3O5 phase is formed as the core with low band gap, and hence, offers improved light absorption in the visible range. However, its photoactivity was found to be lower than that of the core-shell nanoparticles annealed in oxidizing atmosphere. The observed lower photoreduction was due to the presence of midgap states which acted as recombination centres and hence, reduced the photocatalytic activity.

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Generation of reactive oxygen species and charge carriers in plasmonic photocatalytic Au@TiO2 nanostructures with enhanced activity

Physical Chemistry Chemical Physics ◽

10.1039/c8cp01978a ◽

2018 ◽

Vol 20 (23) ◽

pp. 16117-16125 ◽

Cited By ~ 14

Author(s):

Weiwei He ◽

Junhui Cai ◽

Xiumei Jiang ◽

Jun-Jie Yin ◽

Qingbo Meng

Keyword(s):

Reactive Oxygen Species ◽

Photocatalytic Activity ◽

Reactive Oxygen ◽

Charge Carriers ◽

Significant Enhancement ◽

Core Shell ◽

Oxygen Species ◽

Shell Nanostructures ◽

Enhanced Activity ◽

Tio2 Nanostructures

Plasmonic Au@TiO2 core/shell nanostructures exhibit significant enhancement in the generation of ROS, charge carriers and photocatalytic activity.

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Facile synthesis of Ag-ZnO core–shell nanostructures with enhanced photocatalytic activity

Journal of Industrial and Engineering Chemistry ◽

10.1016/j.jiec.2017.12.003 ◽

2018 ◽

Vol 61 ◽

pp. 78-86 ◽

Cited By ~ 66

Author(s):

A.N. Kadam ◽

D.P. Bhopate ◽

V.V. Kondalkar ◽

S.M. Majhi ◽

C.D. Bathula ◽

...

Keyword(s):

Photocatalytic Activity ◽

Core Shell ◽

Facile Synthesis ◽

Shell Nanostructures

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A facile coating method to construct uniform porous α-Fe2O3@TiO2 core-shell nanostructures with enhanced solar light photocatalytic activity

Powder Technology ◽

10.1016/j.powtec.2018.01.067 ◽

2018 ◽

Vol 328 ◽

pp. 389-396 ◽

Cited By ~ 34

Author(s):

Haitao Fu ◽

Shiyu Sun ◽

Xiaohong Yang ◽

Wufa Li ◽

Xizhong An ◽

...

Keyword(s):

Photocatalytic Activity ◽

Solar Light ◽

Core Shell ◽

Shell Nanostructures ◽

Coating Method

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Core-Shell Nanostructures of Graphene-Wrapped CdS Nanoparticles and TiO2 (CdS@G@TiO2): The Role of Graphene in Enhanced Photocatalytic H2 Generation

Catalysts ◽

10.3390/catal10040358 ◽

2020 ◽

Vol 10 (4) ◽

pp. 358 ◽

Cited By ~ 2

Author(s):

Muhammad Zubair ◽

Ingeborg-Helene Svenum ◽

Magnus Rønning ◽

Jia Yang

Keyword(s):

Photocatalytic Activity ◽

Graphene Quantum Dots ◽

Pure Tio2 ◽

Cds Nanoparticles ◽

Core Shell ◽

Shell Nanoparticles ◽

Tio2 Sample ◽

Simulated Solar Light ◽

Shell Nanostructures ◽

Tio2 Shell

Aiming to achieve enhanced photocatalytic activity and stability toward the generation of H2 from water, we have synthesized noble metal-free core-shell nanoparticles of graphene (G)-wrapped CdS and TiO2 (CdS@G@TiO2) by a facile hydrothermal method. The interlayer thickness of G between the CdS core and TiO2 shell is optimized by varying the amount of graphene quantum dots (GQD) during the synthesis procedure. The most optimized sample, i.e., CdS@50G@TiO2 generated 1510 µmole g−1 h−1 of H2 (apparent quantum efficiency (AQE) = 5.78%) from water under simulated solar light with air mass 1.5 global (AM 1.5G) condition which is ~2.7 times and ~2.2 time superior to pure TiO2 and pure CdS respectively, along with a stable generation of H2 during 40 h of continuous operation. The increased photocatalytic activity and stability of the CdS@50G@TiO2 sample are attributed to the enhanced visible light absorption and efficient charge separation and transfer between the CdS and TiO2 due to incorporation of graphene between the CdS core and TiO2 shell, which was also confirmed by UV-vis, photoelectrochemical and valence band XPS measurements.

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