Facile synthesis, structural and optical properties of Au-TiO2 plasmonic nanohybrids for photocatalytic applications

Singh, Jaspal; Sahu, Kavita; Satpati, Biswarup; Shah, Jyoti; Mohapatra, Satyabrata

doi:10.1016/j.jpcs.2019.109100

Cited by 44 publications

(17 citation statements)

References 75 publications

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“…The extra peak at 531.6 eV for Au@TiO2@C was attributed to the oxygen vacancies (O V ). [43] Figure 4(d) shows C-1s peas in Au@TiO 2 @C. Three peaks with binding energies of 284.8, 286.6 and 288.4 eV were assigned to CÀ C, CÀ OH and CÀ O bonds, respectively. [38,44] A small peak at 280.8 eV was also observed in C-1s spectra of Au@TiO 2 @C which indicates formation of CÀ Ti bond in this sample.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Core‐Shell Au@TiO₂@C Nanoparticles and Their Photocatalytic Properties for the Degradation of Rhodamine B Under Simulated‐Solar Light

Wang

Wang³

et al. 2020

ChemistrySelect

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A simple method to synthesize Au@TiO2@C core‐shell sandwich nanoparticles by hydrolysis and depositing carbon quantum dots (CQDs) is reported. The photocatalytic activity of the synthesized material was tested via degrading Rhodamine B (RhB) under simulated‐solar light irradiation. The degradation rate was found in the following order: Au@TiO2@C > P25 > Au@TiO2 > TiO2. The superior photocatalytic of Au@TiO2@C was attributed to synergistic effect of Au and CQDs. The CQDs layer coated outside benefits in improving absorption efficiency of solar light host and separation of electron‐holes pairs. The Au core can accelerate transfer process of photo excitons which can facilitate photocatalytic reaction.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Core‐Shell Au@TiO₂@C Nanoparticles and Their Photocatalytic Properties for the Degradation of Rhodamine B Under Simulated‐Solar Light

Wang

Wang³

et al. 2020

ChemistrySelect

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“…Due to the wide bandgap, it is difficult for the commonly used semiconductors (eg, ZnO, TiO 2 and CeO 2 ) to shield against the UV rays with a long wavelength, which cause the low shielding efficiency of Noble metals doping such as Au, 69 Ag, 70 and Pt 71 on the surface of wide bandgap semiconductors is another approach to improve the UV absorption efficiency. The noble metal is able to affect the bandgap of semiconductor, which can also be explained by the migration of electrons.…”

Section: Surface Hybridization Of Nanoparticles With Inorganicsmentioning

confidence: 99%

“…Noble metals doping such as Au, 69 Ag, 70 and Pt 71 on the surface of wide bandgap semiconductors is another approach to improve the UV absorption efficiency. The noble metal is able to affect the bandgap of semiconductor, which can also be explained by the migration of electrons.…”

Section: Recent Advances In Highly Efficient Uv‐shielding Compositesmentioning

confidence: 99%

Surface engineering of nanoparticles for highly efficient UV‐shielding composites

Liu

Chen

et al. 2020

Polymers for Advanced Techs

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Overexposure to ultraviolet (UV) with high energy can not only hurt human skin but also accelerate the degradation of organic matter. Hence, the preparation of polymer‐based UV‐shielding nanocomposites has attracted substantial attention due to the low cost, easy processing and wide applications. Notably, the highly efficient UV‐shielding polymer nanocomposites are still hindered by the agglomeration of inorganic anti‐UV nanoparticles (Nps) in polymer matrix and the narrow absorption range of UV‐shielding agents. To overcome the aforementioned bottlenecks, surface engineering of anti‐UV Nps including organic modification and inorganic hybridization has been extensively employed to enhance the UV‐shielding efficiency of composites. Herein, to deliver the readers a comprehensive understanding of the surface engineering of anti‐UV Nps, we systematically summarize the recent advances in surface organic modification and inorganic hybridization related to anti‐UV Nps. The UV‐shielding mechanism and the factors affecting UV‐shielding efficiency of polymer nanocomposites are also discussed. Finally, perspectives on remaining challenges and future development of highly efficient UV‐shielding composites are outlined.

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“…The process of photocatalysis of water itself leads to the disassociation of biological and chemical pollutants in the water, as the generation of strong oxidizer OH − will lead to the disassociation of the most prevalent chemical dyes in water such as methylene blue and methylene orange and others [3][4][5]. The quality of catalysts has the rst effect on the e ciency of the process of photocatalysis, where several factors is determining the e ciency of the photocatalyst, including the extension of its energy gap within the visible range of UV and solar radiation, cost e ciency, non-toxic, resistant to corrosion [3,6].…”

Section: Introductionmentioning

confidence: 99%

“…To solve above bottleneck, Multiple solutions have been proposed such as its combination with other semiconductors (co-catalyst) [4,13], adding impurities [4,6] alloying [4] or metallic substances to use ampli cation due to plasmonic of that metallic ones.…”

Section: Introductionmentioning

confidence: 99%

One dimensional efficient photocatalyst based on plasmonic grating

et al. 2021

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We can summarize the bene ts of the water photocatalysis by two words: clean energy and puri cation of pollutants, and its problems as the large energy gap and electron-hole recombination. Scientists are still looking for a semiconductor whose energy gap lies in the visible region, with electron-hole pairs of longer life time. One of the proposed solutions in this eld is combining the available semiconductors (such as TiO 2 ) with a metal of plasmonic properties. The existing of the plasmonic metal will ensure that the visible portion of the solar region will involve in the photocatalysis action. It will be absorbed by the plasmonic metal, be transformed into a local energy that leads to excitation processes in the semiconductor. Also, the existing of the metal will guarantee a longer life time for the electron-gap pairs generated in the semiconductor, as the metal acts as a sink for the electrons generated in the semiconductor. In this paper, we created a unique photocatalyst based on one dimensional grating coated by gold thin lm and covered by TiO 2 cap layer. By examining the sample with visible radiation, we obtained a rate of sabotage of 25 percent within three hours.

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Facile synthesis, structural and optical properties of Au-TiO2 plasmonic nanohybrids for photocatalytic applications

Cited by 44 publications

References 75 publications

Synthesis of Core‐Shell Au@TiO₂@C Nanoparticles and Their Photocatalytic Properties for the Degradation of Rhodamine B Under Simulated‐Solar Light

Synthesis of Core‐Shell Au@TiO₂@C Nanoparticles and Their Photocatalytic Properties for the Degradation of Rhodamine B Under Simulated‐Solar Light

Surface engineering of nanoparticles for highly efficient UV‐shielding composites

One dimensional efficient photocatalyst based on plasmonic grating

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Facile synthesis, structural and optical properties of Au-TiO2 plasmonic nanohybrids for photocatalytic applications

Cited by 44 publications

References 75 publications

Synthesis of Core‐Shell Au@TiO2@C Nanoparticles and Their Photocatalytic Properties for the Degradation of Rhodamine B Under Simulated‐Solar Light

Synthesis of Core‐Shell Au@TiO2@C Nanoparticles and Their Photocatalytic Properties for the Degradation of Rhodamine B Under Simulated‐Solar Light

Surface engineering of nanoparticles for highly efficient UV‐shielding composites

One dimensional efficient photocatalyst based on plasmonic grating

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Synthesis of Core‐Shell Au@TiO₂@C Nanoparticles and Their Photocatalytic Properties for the Degradation of Rhodamine B Under Simulated‐Solar Light

Synthesis of Core‐Shell Au@TiO₂@C Nanoparticles and Their Photocatalytic Properties for the Degradation of Rhodamine B Under Simulated‐Solar Light