Ag–TiO2 composite photoelectrode for dye-sensitized solar cell

Wu, Wan Yu; Hsu, Chun Fa; Wu, Menq Jion; Chen, Chao Nan; Huang, Jiao

doi:10.1007/s00339-017-0963-9

Cited by 25 publications

(7 citation statements)

References 33 publications

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“…In specific, the main and highest diffraction peak of anatase was detected at 2θ = 25.35°, which belongs to (101) crystal plain. The other detected peaks of anatase phase were found in accordance with the PDF No 03-065-5714 [ 6 , 7 , 12 , 16 , 33 , 49 ]. According to the literature, the peaks of Ag-TiO 2 NPs at 2θ, specifically 25.3°, 37.8°, 48.0°, 53.9°, 55.1°, 62.7°, 68.8°, 70.2° and 75.0°, seemed to correspond to the (101), (004), (200), (105), (211), (204), (116), (220), (213) and (215) crystal plains of anatase [ 50 ].…”

Section: Resultssupporting

confidence: 80%

Composite Nanoarchitectonics of Photoactivated Titania-Based Materials with Anticancer Properties

et al. 2022

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The synthesis of titania-based composite materials with anticancer potential under visible-light irradiation is the aim of this study. In specific, titanium dioxide (TiO2) nanoparticles (NPs) chemically modified with silver were embedded in a stimuli-responsive microgel (a crosslinked interpenetrating network (IP) network that was synthesized by poly (N-Isopropylacrylamide) and linear chains of polyacrylic acid sodium salt, forming composite particles. The ultimate goal of this research, and for our future plans, is to develop a drug-delivery system that uses optical fibers that could efficiently photoactivate NPs, targeting cancer cells. The produced Ag-TiO2 NPs, the microgel and the composite materials were characterized through X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), micro-Raman spectroscopy, ultraviolet-visible spectroscopy (UV-Vis), dynamic light scattering (DLS) and transmission electron microscopy (TEM). Our results indicated that Ag-TiO2 NPs were successfully embedded within the thermoresponsive microgel. Either Ag-TiO2 NPs or the composite materials exhibited high photocatalytic degradation efficiency on the pollutant rhodamine B and significant anticancer potential under visible-light irradiation.

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Section: Resultssupporting

confidence: 80%

Composite Nanoarchitectonics of Photoactivated Titania-Based Materials with Anticancer Properties

et al. 2022

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“…The transmission spectra of AT10 and AT20 reveal a redshift due to the influence of the added silver nanoparticles. The spectra of AT10, AT20, AT30, and AT40 exhibit transmission edges at ~330 nm and a broad wave around 500 nm [17,19,20,29,30]. The transmission spectra of the semiconductor and metal nanoparticles overlap, which indicates that the TiO 2 and Ag metal nanoparticles were simultaneously excited by the light.…”

Section: Resultsmentioning

confidence: 99%

“…Via the SPR effect, the metal-nanoparticle composite provides additional electrons to the semiconductor. Different metal nanoparticles (Ag, Au) doped on MOSs are widely used in many fields to generate SPR and enhance photocatalysis; they are also used in gas sensors, environmental protection technologies, solar cells, energy storage devices, and photoelectric materials [17,18,19]. For example, researchers have applied SPR with magnetic microspheres for prion protein detection [20,21,22], a magnetic biochip (Au/Fe 2 O 3 /Au) for antigen detection [23], core-shell γ -Fe2O3@Au nanoparticles for low-field nuclear magnetic resonance [24], a gold film-coated side-polished fiber for temperature sensor fabrication [25], and Au@SiO 2 core-shell NPs into TiO 2 scaffold layer to increase the power conversion efficiency of solar cells [26].…”

Section: Introductionmentioning

confidence: 99%

“…The methods used in the complexation of metal nanoparticles in TiO 2 are primarily chemical-based. However, it is difficult to ensure the uniform doping of silver nanoparticles in TiO 2 for large-scale and mass production [18,19,27,28,29]. We coated silver nanoparticles with TiO 2 by electron-beam (e-beam) evaporation during the semiconductor fabrication process to ensure that the silver nanoparticles were in complete contact with the TiO 2 , without the use of high-temperature annealing, while still successfully sensing 100 ppb ozone [17].…”

Section: Introductionmentioning

confidence: 99%

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The Response of UV/Blue Light and Ozone Sensing Using Ag-TiO2 Planar Nanocomposite Thin Film

Shih

2019

Sensors

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We successfully fabricated a planar nanocomposite film that uses a composite of silver nanoparticles and titanium dioxide film (Ag-TiO2) for ultraviolet (UV) and blue light detection and application in ozone gas sensor. Ultraviolet-visible spectra revealed that silver nanoparticles have a strong surface plasmon resonance (SPR) effect. A strong redshift of the plasmonic peak when the silver nanoparticles covered the TiO2 thin film was observed. The value of conductivity change for the Ag-TiO2 composite is 4–8 times greater than that of TiO2 film under UV and blue light irradiation. The Ag-TiO2 nanocomposite film successfully sensed 100 ppb ozone. The gas response of the composite film increased by roughly six and four times under UV and blue light irradiation, respectively. We demonstrated that a Ag-TiO2 composite gas sensor can be used with visible light (blue). The planar composite significantly enhances photo catalysis. The composite films have practical application potential for wearable devices.

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“…According to recent studies, noble metallic nanoparticles (e.g., Au or Ag NPs) can increase the optical absorption to reduce the recombination of electrons in the dye or electrolyte [18]. W. Y. Wu et al [19] present that Ag can further enhance the photocurrent by acting as a scattering center to reflect the incident light. Jayraj V. Vaghasiya et al incorporated Ag nanoparticles into the TiO 2 matrix and used a D-π-A carbazole dye as the sensitizer, which increased the photocurrent and improved the photovoltaic conversion efficiency (1.1% to 1.9%) [20].…”

Section: Introductionmentioning

confidence: 99%

Study of How Photoelectrodes Modified by TiO2/Ag Nanofibers in Various Structures Enhance the Efficiency of Dye-Sensitized Solar Cells under Low Illumination

et al. 2020

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Dye-sensitized solar cells (DSSCs) are low-cost solar cells belonging to the thin-film photovoltaic cell type. In this study, we studied the photovoltaic performances of DSSCs based on titanium dioxide (TiO2) nanofibers (NFs) containing silver (Ag) nanoparticles (NPs) under low illumination. We used the sol-gel method with the electrospinning technique to prepare the TiO2 NFs containing Ag NPs. Herein, we used two ways to add TiO2/Ag NFs to modify the photoelectrode successfully and enhance the performance of DSSCs. One way was that the TiO2/Ag NFs were mixed with pristine TiO2; the other way was that the TiO2/Ag NFs were seeded beside the TiO2 colloid layer as an additional layer on the photoelectrode of the DSSC. According to this experiment, the photovoltaic conversion efficiency of the DSSC which had TiO2/Ag NF seeded as an additional layer on the photoelectrode (5.13%) was increased by 28% compared to the DSSC without the photoelectrode modification (3.99%). This was due to the suppression of electron recombination and the more effective utilization of the light radiation by adding the TiO2/Ag NFs. Because of the good conductivity of Ag, the electrons were quickly transported and electron recombination was reduced. In addition, the photovoltaic conversion efficiency of the DSSC which had TiO2/Ag NF seeded as an additional layer on the photoelectrode increased from 5.13% to 6.23% during the decrease in illumination from 100 mW/cm2 to 30 mW/cm2; however, its photovoltaic conversion efficiency decreased to 5.31% when the illumination was lowered to 10 mW/cm2.

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Ag–TiO2 composite photoelectrode for dye-sensitized solar cell

Cited by 25 publications

References 33 publications

Composite Nanoarchitectonics of Photoactivated Titania-Based Materials with Anticancer Properties

Composite Nanoarchitectonics of Photoactivated Titania-Based Materials with Anticancer Properties

The Response of UV/Blue Light and Ozone Sensing Using Ag-TiO2 Planar Nanocomposite Thin Film

Study of How Photoelectrodes Modified by TiO2/Ag Nanofibers in Various Structures Enhance the Efficiency of Dye-Sensitized Solar Cells under Low Illumination

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