Photoelectrochemical properties of hierarchical nanocomposite structure: Carbon nanofibers/TiO2/ZnO thin films

Kment, Štěpán; Hubička, Zdeněk; Kmentová, Hana; Klusoň, Petr; Krýsa, Josef; Gregora, I.; Morozova, M.; Čada, Martin; Petras, David; Dytrych, Pavel; Slater, Morwenna; Jastrabı́k, L.

doi:10.1016/j.cattod.2010.10.001

Cited by 27 publications

(9 citation statements)

References 34 publications

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“…Furthermore, the degree of fibrosis can be measured by the intensity ratio of the G to D band ( I G / I D ) [ 28 – 30 ], where I G / I D is the intensity ratio of D-peak and G-peak. A slight increase in the I G / I D ratio is observed in the spectrum of In 2 S 3 /CNF-2 composites, the D/G integral intensity ratio ( I D / I G ) for CNF in the In 2 S 3 /CNF-2 sample (1.13) is slightly higher than that of CNF (1.12), it is indicated that a certain amount of In 2 S 3 deposited on the surface of CNF during the chemical reduction process, and the conjugated CNF network was reestablished [ 31 ]. The two peaks for D and G band of the composite no shift appears, indicating that only a small amount of In 2 S 3 deposited on the surface of CNF.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Indium Sulfide/Flexible Electrospun Carbon Nanofiber for Enhanced Photocatalytic Efficiency and Its Application

Liu

Dong

et al. 2017

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Heterojunction system has been proved as one of the best architectures for photocatalyst owing to extending specific surface area, expanding spectral response range, and increasing photoinduced charges generation, separation, and transmission, which can provide better light absorption range and higher reaction site. In this paper, Indium Sulfide/Flexible Electrospun Carbon Nanofiber (In2S3/CNF) heterogeneous systems were synthesized by a facile one-pot hydrothermal method. The results from characterizations of SEM, TEM, XRD, Raman, and UV-visible diffuse reflectance spectroscopy displayed that flower-like In2S3 was deposited on the hair-like CNF template, forming a one-dimensional nanofibrous network heterojunction photocatalyst. And the newly prepared In2S3/CNF photocatalysts exhibit greatly enhanced photocatalytic activity compared to pure In2S3. In addition, the formation mechanism of the one-dimensional heterojunction In2S3/CNF photocatalyst is discussed and a promising approach to degrade Rhodamine B (RB) in the photocatalytic process is processed.

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Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Indium Sulfide/Flexible Electrospun Carbon Nanofiber for Enhanced Photocatalytic Efficiency and Its Application

Liu

Dong

et al. 2017

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“…Polarization curves and the open circuit potential (OCP) measurements seem to be suitable for the assessment of the photo-electrochemical efficiency of the TiO 2 and α-Fe 2 O 3 thin films. Photoelectrochemical properties of films illuminated from the front side (from film/electrolyte interface) were tested in a three electrode arrangement [24,25]. The TiO 2 or α-Fe 2 O 3 thin film on TCO served as the working electrode, the silver-silver chloride electrode (Ag/AgCl) as the reference and a platinum sheet as the counter electrode.…”

Section: Methodsmentioning

confidence: 99%

TiO2 and Fe2O3 Films for Photoelectrochemical Water Splitting

et al. 2015

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Titanium oxide (TiO2) and iron oxide (α-Fe2O3) hematite films have potential applications as photoanodes in electrochemical water splitting. In the present work TiO2 and α-Fe2O3 thin films were prepared by two methods, e.g., sol-gel and High Power Impulse Magnetron Sputtering (HiPIMS) and judged on the basis of physical properties such as crystalline structure and surface topography and functional properties such as simulated photoelectrochemical (PEC) water splitting conditions. It was revealed that the HiPIMS method already provides crystalline structures of anatase TiO2 and hematite Fe2O3 during the deposition, whereas to finalize the sol-gel route the as-deposited films must always be annealed to obtain the crystalline phase. Regarding the PEC activity, both TiO2 films show similar photocurrent density, but only when illuminated by UV light. A different situation was observed for hematite films where plasmatic films showed a tenfold enhancement of the stable photocurrent density over the sol-gel hematite films for both UV and visible irradiation. The superior properties of plasmatic films could be explained by ability to address some of the hematite drawbacks by the deposition of very thin films (25 nm) consisting of small densely packed particles and by doping with Sn.

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“…Fig. 4 provides more information on light-sensitive thin films, each of which might be assigned to a different deposition technique [35,36,38,39]. Besides the film originating from the sol-gel, barrier discharge, magnetron sputtering, and a hollow cathode plasma jet were employed.…”

Section: The Dynamic Character Of An Active Sitementioning

confidence: 99%

“…If the answer is positive, the holes (h + ) might be formally referred to as standard active sites since upon fixed illumination their abundance is constant over time. Obviously, this equilibrium is dynamic because it reflects any change in the experimental conditions [30][31][32][33][34][35][36]. It implies that the polarization plots (linear voltammetry) help in such assessments.…”

Section: The Dynamic Character Of An Active Sitementioning

confidence: 99%

Active Sites in Heterogeneous Photocatalysis: Brief Notes on the Identification of their Analogies with the Standard Heterogeneous Catalysis Concept

et al. 2021

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The reaction rate concepts in heterogeneous catalysis are based on well-defined and usually well-quantified active sites. Such an active site is stable over time and its main features are typically constant. In heterogeneous photocatalysis, the active site is of different nature. Its existence depends on the instantaneous availability of photons and the variable ability of the photocatalyst to use them. In fact, a realistic expression of the active site that at least in the main feature -stability over timeresembles the classical heterogeneous catalytic concept is missing. Here, the concept of a dynamic active site of the heterogeneous oxidation photocatalyst that is (in a dynamic sense) time stable is elaborated and carefully discussed. The novelty of this approach should be seen in the straightforward applicability of standard kinetic models.

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Photoelectrochemical properties of hierarchical nanocomposite structure: Carbon nanofibers/TiO2/ZnO thin films

Cited by 27 publications

References 34 publications

Facile Synthesis of Indium Sulfide/Flexible Electrospun Carbon Nanofiber for Enhanced Photocatalytic Efficiency and Its Application

Facile Synthesis of Indium Sulfide/Flexible Electrospun Carbon Nanofiber for Enhanced Photocatalytic Efficiency and Its Application

TiO2 and Fe2O3 Films for Photoelectrochemical Water Splitting

Active Sites in Heterogeneous Photocatalysis: Brief Notes on the Identification of their Analogies with the Standard Heterogeneous Catalysis Concept

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