Photoelectrochemical Determination of the Flatband Potential of Boron-Doped Diamond

Pleskov, Yu. V.; Mazin, V. M.; Evstefeeva, Yu. E.; Varnin, V. P.; Teremetskaya, I. G.; Laptev, V. A.

doi:10.1149/1.1390982

Cited by 38 publications

(24 citation statements)

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“…The flatband potential was estimated by photoelectrochemical method of photocur- rent onset. 30,33,34 As shown in Fig. 11, the photocurrent increased toward cathodic direction confirming the p-type semiconductor character.…”

Section: Resultssupporting

confidence: 56%

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Photocatalytic Activity of Novel Ag₄V₂O₇ Photocatalyst Under Visible Light Irradiation

et al. 2013

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In this study, pure Ag4V2O7 was synthesized via hydrothermal method without surfactant at different temperatures (100°C, 120°C, and 140°C) and pH values (4 and 5) for the first time. Moreover, Ag4V2O7 nanoparticles with homogeneous size distribution about 200–300 nm can be obtained by adding polyvinylpyrrolidone to the synthesis system. Effects of hydrothermal synthesis conditions on photophysical properties and photocatalytic activity of Ag4V2O7 were investigated systematically. Ag4V2O7 sample prepared at 120°C and pH = 4 had the optimal photocatalytic activity among these samples, which almost completely degraded 10 ppm Rhodamine B within 3 h under visible light irradiation (420 nm < λ < 800 nm). The degradation products were measured by liquid chromatography–mass spectroscopy. The active species involved in the degradation process were analyzed by means of adding active species scavengers, electron spin resonance techniques, and photoelectrochemical experiments. A possible mechanism for photocatalytic degradation of organic pollutants on Ag4V2O7 photocatalyst was proposed and discussed preliminarily.

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Section: Resultssupporting

confidence: 56%

“…HT120‐4 sample was chosen to be further investigated due to its optimal photocatalytic activity. The flatband potential was estimated by photoelectrochemical method of photocurrent onset . As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Activity of Novel Ag₄V₂O₇ Photocatalyst Under Visible Light Irradiation

et al. 2013

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“…At the same time, the quasi-Fermi level (measured as E OC ) rises because of the higher occupancy of the conduction band. Accordingly, at sufficiently high-intensity, E OC becomes constant and this value is very close to the potential of the conduction band edge [80,125,[185][186][187]. In order to avoid reaction of photogenerated electrons with oxygen in the electrolyte, which would decrease the photovoltage, it is necessary to purge the solution with inert gas.…”

Section: Open-circuit Photovoltage Measurementsmentioning

confidence: 99%

(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO₂‐Based Nanomaterials

Beránek

2011

Advances in Physical Chemistry

329

183

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TiO 2 -based nanomaterials play currently a major role in the development of novel photochemical systems and devices. One of the key parameters determining the photoactivity of TiO 2 -based materials is the position of the band edges. Although its knowledge is an important prerequisite for understanding and optimizing the performance of photochemical systems, it has been often rather neglected in recent research, particularly in the field of heterogeneous photocatalysis. This paper provides a concise account of main methods for the determination of the position of the band edges, particularly those suitable for measurements on nanostructured materials. In the first part, a survey of key photophysical and photochemical concepts necessary for understanding the energetics at the semiconductor/solution interface is provided. This is followed by a detailed discussion of several electrochemical, photoelectrochemical, and spectroelectrochemical methods that can be applied for the determination of band edge positions in compact and nanocrystalline thin films, as well as in nanocrystalline powders.

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“…In both cases, U OCP will shi towards the at band potential and is expected theoretically to reach it at sufficiently high illumination intensities. 57 In both cases the maximum photo-potential is obtained when the energy bands become at. 58 Hence, a plot of the open circuit potential as a function of illumination intensity should asymptote to the at band value at higher intensities.…”

Section: Methods For At Band Determinationmentioning

confidence: 94%

“…Sometimes, this method is suggested as one of the most accurate, as it requires no assumption-based analysis and in principle, the measurements evade any interference of the potential drop across the Helmholtz layer or the application of bias, which may result in the formation of surface states or the decomposition of the semiconductor. 57 However, the stabilization of U OCP is a noninstantaneous process due to the equilibration of the elds induced by photo-generated change carriers and the semi-conductor|solution interface. 59 Furthermore, this method will not be accurate in the presence of defects, which may pin the Fermi level.…”

Section: Methods For At Band Determinationmentioning

confidence: 99%

Flat band potential determination: avoiding the pitfalls

et al. 2019

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Photoelectrochemical Determination of the Flatband Potential of Boron-Doped Diamond

Cited by 38 publications

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Photocatalytic Activity of Novel Ag₄V₂O₇ Photocatalyst Under Visible Light Irradiation

Photocatalytic Activity of Novel Ag₄V₂O₇ Photocatalyst Under Visible Light Irradiation

(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO₂‐Based Nanomaterials

Flat band potential determination: avoiding the pitfalls

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Photoelectrochemical Determination of the Flatband Potential of Boron-Doped Diamond

Cited by 38 publications

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Photocatalytic Activity of Novel Ag4V2O7 Photocatalyst Under Visible Light Irradiation

Photocatalytic Activity of Novel Ag4V2O7 Photocatalyst Under Visible Light Irradiation

(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO2‐Based Nanomaterials

Flat band potential determination: avoiding the pitfalls

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Photocatalytic Activity of Novel Ag₄V₂O₇ Photocatalyst Under Visible Light Irradiation

Photocatalytic Activity of Novel Ag₄V₂O₇ Photocatalyst Under Visible Light Irradiation

(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO₂‐Based Nanomaterials