Deposition of transparent TiO2 nanotubes-films via electrophoretic technique for photovoltaic applications

Zhang, Jin; Li, Shijie; Yang, Pengfei; Que, Wenxiu; Liu, Weiguo

doi:10.1007/s40843-015-0085-7

Cited by 20 publications

(12 citation statements)

References 39 publications

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“…TiO2, a white odorless crystalline powder, is deemed a low or even non-toxic material [19][20][21]. TiO2 NPs are manufactured worldwide and commonly used in many fields, such as paints, cosmetics, photosensitive materials, and food additives [22,23]. With the development of nanomedicine, the application of TiO2 NPs in biomedicine as carriers in drug and gene delivery has become very common [24,25].…”

Section: Titanium Dioxide Nanoparticlesmentioning

confidence: 99%

Toxic effects of metal oxide nanoparticles and their underlying mechanisms

et al. 2017

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Nanomaterials have attracted considerable interest owing to their unique physicochemical properties. The wide application of nanomaterials has raised many concerns about their potential risks to human health and the environment. Metal oxide nanoparticles (MONPs), one of the main members of nanomaterials, have been applied in various fields, such as food, medicine, cosmetics, and sensors. This review highlights the bio-toxic effects of widely applied MONPs and their underlying mechanisms. Two main underlying toxicity mechanisms, reactive oxygen species (ROS)-and non-ROS-mediated toxicities, of MONPs have been widely accepted. ROS activates oxidative stress, which leads to lipid peroxidation and cell membrane damage. In addition, ROS can trigger the apoptotic pathway by activating caspase-9 and-3. Non-ROS-mediated toxicity mechanism includes the effect of released ions, excessive accumulation of NPs on the cell surface, and combination of NPs with specific death receptors. Furthermore, the combined toxicity evaluation of some MONPs is also discussed. Toxicity may dramatically change when nanomaterials are used in a combined system because the characteristics of NPs that play a key role in their toxicity such as size, surface properties, and chemical nature in the complex system are different from the pristine NPs.

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Section: Titanium Dioxide Nanoparticlesmentioning

confidence: 99%

Toxic effects of metal oxide nanoparticles and their underlying mechanisms

et al. 2017

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“…These studies encouraged a tremendous upsurge of interest in this topic and meaningful adjustments and enhancements of the nanostructure of anodized TiO2. Furthermore, several studies have been offered of TNTs, Jin Zhang and co-workers [18] have been prepared the TiO2 nanotubes films via the electrophoretic method on the fluoride doped tin oxide (FTO) glass and study its photovoltaic applications. The porous double-walled TNTs via the ultraviolet-assisted anodization have synthesized by the Ghafar Ali et.al [19].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of TiO2 nanotubes via three - electrodes anodization technique under sound waves impact and use in dye-sensitized solar cell

Yousif

Haran

2020

Egypt. J. Chem.

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An experimental study on the growth of Titanium dioxide nanotubes (TNTs) during the three-electrode anodization technique of Ti substrate in fluoride-ion /ethylene glycol (EG) electrolyte has been conducted at 20 V for 30 minutes. The evolution of this nanostructure includes the inward growth of a compact porous layer at the oxide/Ti substrate interface that grows into nanotubes. A further explication for the formation of these TNTs via the anodization and ultrasonic vibration techniques were introduced based on the geometric variations observed. X-ray diffraction (XRD) spectrum showed that the dominance of the anatase phase with improved crystallinity properties at crystal size 15.2 nm which was affected by the sound waves. Highly ordered 7.09 μm long TNTs with an average diameter of 65.57 nm were produced in the presence of ultrasound and 4.50 μm long of nanotubes with an average diameter of 51.18 nm were obtained in the absence of ultrasound. Besides, the energy dispersive x-ray (EDX) spectra confirmed the chemical compositions of TiO2-NTs with an atomic ratio of 1/2 ( Ti:O), which indicates the development of TNTs with varying lengths and average diameters. Annealed TiO2-NTs were applied as photoanode in a back-side illuminated dye-sensitized solar cell. The Full factor, FF of 0.436 ( Photoconversion efficiency η, 0.51), was achieved for the TNTs photoanode prepared in the presence of ultrasound higher than DSSC with TNTs photoanode fabricated in the absence of ultrasound.

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“…In particular, the properties of materials such as excellent light scattering, fast electron transport and large specific surface area play an important role in enhancing the light conversion efficiency of DSSCs [9,10]. In order to enhance the photoelectric conversion efficiency of a DSSC, researchers have designed different architectures of TiO2 nanocrystalline films, such as doping of metal and nonmetal elements, surface modifications, and combination with narrow band gap semiconductors [11][12][13]. In addition, the conduction and valence bands of the rare earth (RE) ion modified TiO2 nanoparticles have higher potentials than those of unmodified TiO2 nanoparticles due to the participation of RE ions in the hybridization orbital of TiO2, which can reduce the probability of recombination of excited electrons and holes to increase the short-circuit current during the operation of the DSSCs.…”

Section: Introductionmentioning

confidence: 99%

Enhanced photoelectric conversion efficiency of dye-sensitized solar cells by the synergetic effect of NaYF4:Er3+/Yb3+ and g-C3N4

Pan

et al. 2017

Sci. China Mater.

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TiO2-NaYF4:Er 3+ /Yb 3+ -C3N4 composite photoanodes were successfully designed for the first time. The photoelectric conversion efficiency of TiO2-NaYF4:Er 3+ /Yb 3+ -C3N4 composite cell can result an efficiency of 7.37%, which is higher than those of pure TiO2 cell and TiO2-C3N4 composite cell. The enhancement of the efficiency can be attributed to the synergetic effect of NaYF4:Er 3+ /Yb 3+ and C3N4. Electrochemical impedance spectroscopy analysis revealed that the interfacial resistance of the TiO2-dye|I3 − /I − electrolyte interface of TiO2-NaYF4:Er 3+ /Yb 3+ -C3N4 composites cell was much smaller than that of pure TiO2 cell. In addition, the TiO2-NaYF4:Er 3+ /Yb 3+ -C3N4 composite cell had longer electron recombination time and shorter electron transport time than that of pure TiO2 cell.

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Deposition of transparent TiO2 nanotubes-films via electrophoretic technique for photovoltaic applications

Cited by 20 publications

References 39 publications

Toxic effects of metal oxide nanoparticles and their underlying mechanisms

Toxic effects of metal oxide nanoparticles and their underlying mechanisms

Fabrication of TiO2 nanotubes via three - electrodes anodization technique under sound waves impact and use in dye-sensitized solar cell

Enhanced photoelectric conversion efficiency of dye-sensitized solar cells by the synergetic effect of NaYF4:Er3+/Yb3+ and g-C3N4

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