Hydrothermal growth of a composite TiO2 hollow spheres/TiO2 nanorods powder and its application in high performance dye-sensitized solar cells

Marandi, Maziar; Bayat, S.; Sabet, Mahboubeh Naeimi Sani

doi:10.1016/j.jelechem.2018.11.023

Cited by 18 publications

(2 citation statements)

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“…New opportunities for application of TiO 2 materials occurred in different areas, such as dye-sensitized solar cells (DSSCs) and electrochemical cells, catalysis, supercapacitors [ 1 , 2 , 3 , 4 , 5 ], gas sensors [ 6 ], biomaterials [ 7 ], and environmental and energy applications [ 1 , 8 ]. Large specific area is a key factor for improving the degradation rate and catalytic efficiency at the catalyst/organic pollutant interface.…”

Section: Introductionmentioning

confidence: 99%

Surface Wettability of ZnO-Loaded TiO2 Nanotube Array Layers

et al. 2020

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Herein we report on the synthesis and the effects of gradual loading of TiO2 nanotube array layers with ZnO upon surface wettability. Two-step preparation was chosen, where TiO2 nanotube layers, grown in a first instance by anodization of a Ti foil, were gradually loaded with controlled amounts of ZnO using the reactive RF magnetron sputtering. After crystallization annealing, the formerly amorphous TiO2 nanotubes were converted to predominantly anatase crystalline phase, as detected by XRD measurements. The as-prepared nanotubes exhibited a well-aligned columnar structure, 1.6 μm long and 88 nm in diameter, and a small concentration of oxygen vacancies. Ti2+ and Ti3+ occur along with the Ti4+ state upon sputter-cleaning the layer surfaces from contaminants. The Ti2+ and Ti3+ signals diminish with gradual ZnO loading. As demonstrated by the VB-XPS data, the ZnO loading is accompanied by a slight narrowing of the band gap of the materials. A combined effect of material modification and surface roughness was taken into consideration to explain the evolution of surface super-hydrophilicity of the materials under UV irradiation. The loading process resulted in increasing surface wettability with approx. 33%, and in a drastic extension of activation decay, which clearly points out to the effect of ZnO-TiO2 heterojunctions.

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Section: Introductionmentioning

confidence: 99%

Surface Wettability of ZnO-Loaded TiO2 Nanotube Array Layers

et al. 2020

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“…The higher speci c surface area impacts on enhancement of substrate and photocatalyst interaction so that photodegradation effectiveness optimally increases. The sub-micron light scattered impacts the enhancement of the photon movement pathway's length in photoanode, then it can improve light absorption and e ciency [11]. Photocatalytic activity of TiO 2 can be improved again with composite or hybrid formation by metal or non-metal.…”

Section: Introductionmentioning

confidence: 99%

Highly photodegradation of organic dye pollutant RhB using TiO2-modified reduced graphene oxide

Hidayat

Wahyuningsih

Fadillah

et al. 2021

Preprint

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TiO2-modified reduced graphene oxide (TiO2-rGO) has been studied in one-process step synthesis via the hydrothermal method. In this study, the various concentrations of rGO were investigated and characterized by fourier transform infrared (FTIR), x-ray diffraction (XRD), scanning electron microscope (SEM), surface area analyzer (SAA), thermogravimetric analysis/differential thermal analysis (TGA/DTA), and spectroscopy UV-Vis. In addition, the photodegradation of rhodamine-B was studied by a batch system under visible light irradiation at wavelength 554 nm. The optimum experimental results showed that the presence of rGO in TiO2 nanostructures could improve the specific surface area until 248.58 m2 g− 1 and enhanced the photodegradation efficiency until 70.66% under visible light irradiation. The photocatalyst stability was evaluated for five cycles experiment and the performance have reduced 6.58% efficiency.

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