Effect of specific surface area on photoelectrochemical properties of TiO2 nanotubes, nanosheets and nanowires coated with TiC thin films

Sedira, Sofiane; Mendaci, Bilel

doi:10.1016/j.jphotochem.2016.03.030

Cited by 19 publications

(3 citation statements)

References 30 publications

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“…The samples present their sharp absorption edges in the infrared region, which signies that electrons within the samples undergo efficient transitions from the valence band to the conduction band under the irradiation of visible light. The superior light absorption of NWs as compared to NPs and SC, which was possibly caused by the large surface area and the low stacking density of NWs, 40,41 implies the higher efficiency of the generation of the energetic electron-hole pairs. Fig.…”

Section: Resultsmentioning

confidence: 99%

Significant hydrogen generation via photo-mechanical coupling in flexible methylammonium lead iodide nanowires

Zhang,

Huang,

Zhu

et al. 2024

Chem. Sci.

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Section: Resultsmentioning

confidence: 99%

Significant hydrogen generation via photo-mechanical coupling in flexible methylammonium lead iodide nanowires

Zhang,

Huang,

Zhu

et al. 2024

Chem. Sci.

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“…This may be because the silver modification adds a new energy level between the SPI energy levels so that the photoelectrons generated under the light condition can be transferred to silver. The photoelectron recombination rate is reduced, and the photoelectric efficiency is improved [21] …”

Section: Resultsmentioning

confidence: 99%

Silver‐anchored dendrimer efficiently Light‐drive conversion of p‐nitrophenol

Chen,

Wang

2023

ChemistrySelect

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Efficient use of solar energy for photocatalytic organic synthesis and degradation of organic matter is one of the most promising ways to solve energy shortage and environmental pollution. Silver/sulfur‐doped polyimide (Ag/SPI) was successfully prepared by anchoring silver nanoparticles on sulfur doped polyimide with dendriform structure by an open‐loop and closed‐loop method. Through the analysis of the structure, morphology and photoelectric properties by different characteristics, it is found that the anchoring of silver nanoparticles greatly reduces the electron‐hole recombination rate of SPI, and the cyclic stability is relatively good, and the electrons generated by photoexcitation can participate in the reduction of p‐nitrophenol more. Therefore, the activity of degradation of organic pollutants was greatly improved under the irradiation of visible light. At 5 minutes, the degradation rate of p‐nitrophenol reached 100 %, and the only product p‐nitrophenol was generated. The reaction time was 12 times that of SPI without anchored metal particles. The Ag/SPI dual‐function catalyst provides a new idea for the application of p‐nitrophenol wastewater treatment and the conversion of p‐aminophenol and provides a new reference direction for the field of organic wastewater treatment and organic synthesis.

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“…Further analysis on the surface area of the samples was performed using the BET technique. The application of the BET approach to estimate surface area for similar systems is reported in the literature. , The BET surface area of T_NT and T_NT/PbS samples calculated for 1 g of material is 65 m 2 and 80 m 2 , respectively. The area obtained for the nanotube is consistent with the numbers found in the literature.…”

Section: Resultsmentioning

confidence: 99%

One-Pot Fabrication of High Coverage PbS Quantum Dot Nanocrystal-Sensitized Titania Nanotubes for Photoelectrochemical Processes

et al. 2018

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Lead sulfide quantum dot nanocrystal (QDNC) sensitized TiO 2 nanotubes have been fabricated using a simple, wet chemical method that is both time-and cost-effective. A single precursor source containing both Pb and S has been employed, with oleylamine as a linker molecule to synthesize the PbS under an ambient pressure based approach. This approach serves to assemble the QDNCs on a TiO 2 nanotube surface. Surface characterization was performed using electron microscopy, X-ray diffraction, and elemental analysis, indicating the formation of PbS quantum dots along the nanotube walls and intertubular spacing. The optoelectronic, photoelectrochemical, and photocatalytic properties of the composite heterostructure have been characterized using absorbance spectroscopy, electrochemical studies (including efficiency measurements), and methylene blue conversion as a probe. A 24-fold increase in the photocurrent of TiO 2 −PbS heterostructure over bare TiO 2 nanotube has been observed. Electrochemical impedance measurements of the TiO 2 nanotube sample indicate donor density of ∼4.5 × 10 19 cm −3 while TiO 2 /PbS heterostructure shows an n-n photoactive heterojunction with a donor density of ∼2.3 × 10 20 cm −3 . A 12% increase in photocatalytic activity and theoretical estimates suggesting almost 40-fold enhancement toward value-added product synthesis with PbS inclusion are presented.

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Effect of specific surface area on photoelectrochemical properties of TiO2 nanotubes, nanosheets and nanowires coated with TiC thin films

Cited by 19 publications

References 30 publications

Significant hydrogen generation via photo-mechanical coupling in flexible methylammonium lead iodide nanowires

Significant hydrogen generation via photo-mechanical coupling in flexible methylammonium lead iodide nanowires

Silver‐anchored dendrimer efficiently Light‐drive conversion of p‐nitrophenol

One-Pot Fabrication of High Coverage PbS Quantum Dot Nanocrystal-Sensitized Titania Nanotubes for Photoelectrochemical Processes

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