Enhanced photoelectrochemical water splitting using gadolinium doped titanium dioxide nanorod array photoanodes

Ahmad, Adil; Yerlikaya, Gurbet; Rehman, Zia ur; Paksoy, Halime; Kardaş, Gülfeza

doi:10.1016/j.ijhydene.2019.11.117

Cited by 32 publications

(8 citation statements)

References 85 publications

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“…The (αhν) 2 ∼hv graph relation of Gd doped TiO2 film was demonstrated in Figure 3b. The optical bandgap energy (Eg) of the thin film was found 2.85 eV and the result is suitable with the previously studied related to doping rare-earth metal in the TiO2 matrix [22,23]. The oxygen atoms are loosed and free electrons are generated with doping Gd element to TiO2 matrix and the redshift in the absorbance band is due to the transition of an electron from the valance band to 4f energy level of Gd [22].…”

Section: Resultssupporting

confidence: 74%

Synthesis of Gd doped TiO2 Thin Film for Photocatalytic Degradation of Malachite Green

Eskalen

Kerli²

2020

Sakarya University Journal of Science

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In this research work, a simple spray pyrolysis method was employed to synthesized gadolinium (Gd) doped titanium oxide (TiO2) thin film. The crystal structure and morphology of the sample was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). According to XRD measurements, no apparent crystal peak was observed. The thickness of the prepared film was found to be 228 nm from SEM observation. The optical transmittance and bandgap energy of the synthesized thin film was investigated by using UV-Vis spectroscopy. The high transmission of the thin film was found in the visible region. The optical bandgap energy of the prepared film was found to be 2.85 eV. The photocatalytic degradation of malachite green solution was studied. As a result of the photocatalytic experiment, the thin film could be used as an effective photocatalyst for malachite green dye.

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Section: Resultssupporting

confidence: 74%

Synthesis of Gd doped TiO2 Thin Film for Photocatalytic Degradation of Malachite Green

Eskalen

Kerli²

2020

Sakarya University Journal of Science

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“…However, the CdSe-TiO 2 nanotube thin films deposited at higher chemical bath temperatures exhibited a decrease in photocurrent density, with 1.1 mA cm −2 , 1.8 mA cm −2 , and 0.5 mA cm −2 for the samples deposited at temperatures of 40, 50, and 60 • C, respectively. The obtained photocurrent density was much higher compared to other TiO 2 thin film-based photoelectrochemical cells that were reported earlier: Gd@TiO 2 NRA (~0.51 mA cm −2 ) [30], TiO 2 /g-C 3 N 4 (~0.85 mA cm −2 ) [55], TiO 2 /WO 3 (~1.00 mA cm −2 ) [56], and CdSe-TiO 2 (~1.6 mA cm −2 ) [57].…”

Section: Resultsmentioning

confidence: 56%

“…Moreover, the fast electron/hole recombination and sluggish charge transfer by the TiO 2 nanotube thin films significantly demerit the photoelectrochemical performance of this material [24]. In order to overcome the limitations, modification, such as electrochemical reduction [25,26], metal oxide heterojunction [27,28], defect engineering [29], and metal or non-metal doping [30][31][32][33], have been done to lower the band gap of the TiO 2 nanotube thin films and, thus, enhance the conductivity, radiation adsorption, and catalytic activity, respectively. The deposition of small band gap semiconductor materials as a sensitizer on the TiO 2 nanotube thin films [34][35][36] have been proven to be an important approach in order to tune the overall band gap of the material and improve its photoelectrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Influence of Temperature Reaction for the CdSe–TiO2 Nanotube Thin Film Formation via Chemical Bath Deposition in Improving the Photoelectrochemical Activity

et al. 2020

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In this present work, we report the deposition of cadmium selenide (CdSe) particles on titanium dioxide (TiO2) nanotube thin films, using the chemical bath deposition (CBD) method at low deposition temperatures ranging from 20 to 60 °C. The deposition temperature had an influence on the overall CdSe–TiO2 nanotube thin film morphologies, chemical composition, phase transition, and optical properties, which, in turn, influenced the photoelectrochemical performance of the samples that were investigated. All samples showed the presence of CdSe particles in the TiO2 nanotube thin film lattice structures with the cubic phase CdSe compound. The amount of CdSe loading on the TiO2 nanotube thin films were increased and tended to form agglomerates as a function of deposition temperature. Interestingly, a significant enhancement in photocurrent density was observed for the CdSe–TiO2 nanotube thin films deposited at 20 °C with a photocurrent density of 1.70 mA cm−2, which was 17% higher than the bare TiO2 nanotube thin films. This sample showed a clear surface morphology without any clogged nanotubes, leading to better ion diffusion, and, thus, an enhanced photocurrent density. Despite having the least CdSe loading on the TiO2 nanotube thin films, the CdSe–TiO2 nanotube thin films deposited at 20 °C showed the highest photocurrent density, which confirmed that a small amount of CdSe is enough to enhance the photoelectrochemical performance of the sample.

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“…Few investigations regarding non-Newtonian are presented in Refs. [33][34][35][36][37] The Objective of this research is to explore entropy rate in magnetohydromagnetic Jeffrey liquid flow over a curved stretchable surface. Heat equation is discussed in presence of dissipation, Lorentz force and radiation.…”

Section: Introductionmentioning

confidence: 99%

Entropy optimized flow of Jeffrey fluid with radiation effect over a stretched surface

Hayat

Kainat

Khan

et al. 2022

Advances in Mechanical Engineering

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The theme of this paper is to scrutinize hydromagnetic flow of Jeffrey fluid subject to stretched curved sheet. Heat expression is developed through dissipation, magnetic force and radiation. Entropy generation is also studied. First order isothermal reaction is examined. Nonlinear ordinary differential systems are found through adequate transformation. Here we have used the ND-based numerical solution method to develop numerical results. Impact of sundry variables on temperature, fluid flow, concentration and entropy rate are discussed. Performance of skin friction and heat transport rate via flow parameters are graphically studied. An increase in curvature variables lead to improve velocity and thermal field. Higher approximation of radiation enhances temperature. An intensification in drag force is seen versus Deborah number. Larger approximation of Brinkman number boosts up entropy analysis.

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Enhanced photoelectrochemical water splitting using gadolinium doped titanium dioxide nanorod array photoanodes

Cited by 32 publications

References 85 publications

Synthesis of Gd doped TiO2 Thin Film for Photocatalytic Degradation of Malachite Green

Synthesis of Gd doped TiO2 Thin Film for Photocatalytic Degradation of Malachite Green

Influence of Temperature Reaction for the CdSe–TiO2 Nanotube Thin Film Formation via Chemical Bath Deposition in Improving the Photoelectrochemical Activity

Entropy optimized flow of Jeffrey fluid with radiation effect over a stretched surface

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