Semiconductor Electrochemistry

Memming, R.

doi:10.1002/9783527613069

Cited by 217 publications

(322 citation statements)

References 19 publications

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“…If a plot of hn vs a 1/2 forms a straight line, there is an indirect band gap, the energy of which can be determined by extrapolating the straight line to a ¼ 0. [8] 3. 1…”

Section: The Solar Spectrummentioning

confidence: 99%

“…The principle of the DSSC has also become a part of the core-chemistry and energy science teaching and research. Text books have sections or chapters dealing with DSSCs; [8,64] laboratory kits have been developed for educational purposes under the slogan 'make your own solar cell'. Not only energy science, but also photochemistry, photoelectrochemistry, materials science and transition metal co-ordination chemistry have significantly benefited from DSSC research.…”

Section: Introductionmentioning

confidence: 99%

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Solar Energy Materials

Gibson

Hagfeldt

2011

Energy Materials

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“…If a plot of hn vs a 1/2 forms a straight line, there is an indirect band gap, the energy of which can be determined by extrapolating the straight line to a ¼ 0. [8] 3. 1…”

Section: The Solar Spectrummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solar Energy Materials

Gibson

Hagfeldt

2011

Energy Materials

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“…The observed increase in photocatalytic activity of Pt/TiO 2 was attributed to the slower recombination of electron-hole pairs due to the formation of Schottky junction at the Pt-TiO 2 interface and trapping the photoexcited conductance band electrons. 43 This trapping mechanism slows down the recombination reaction of electron-hole pairs and allows a more efficient charge separation. Hence, the transfer of trapped electrons to dissolved oxygen in the system will become faster and more holes and hydroxyl radicals will be available for the oxidation of the target organic pollutants on the catalyst surface as well as in the solution phase.…”

Section: Amount Of Pt-loadingmentioning

confidence: 99%

The Effects of Some Operational Parameters in Photodegradation of Benzylamine and Aniline and Their Kinetics in Aqueous Suspension of TiO₂ and Pt–Loaded TiO₂

et al. 2007

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Photocatalytic degradation of benzylamine and aniline on TiO2, Pt-modified TiO2, ZnO and ZnS in aqueous solution has been investigated. The degradation of the compounds follows a pseudo-first-order kinetics according to Langmuir-Hinshelwood model. The degradation process of benzylamine and aniline was evaluated by ninhydrin spectrophotometric method using UV-visible spectrophotometer in lambda(max) = 538 and 525 nm, respectively. The results showed the order of Pt/TiO2 > TiO2 > ZnO > ZnS for photocatalytic activity. In addition increasing of the Pt-loading was found to enhance the degradation rate of the compounds up to the optimal amount of 5 wt. % onto the surface of TiO2 so that the rates of degradation were increased about two times. Rate constants for photodegradation of benzylamine and aniline were found to be 1.4 x 10(-3) min(-1) and 0.7 x 10(-3) min(-1) for TiO2 as photocatalyst, while 2.7 x 10(-3) min(-1) and 1.7 x 10(-3) min(-1) for (5 wt.%) Pt/TiO2 as photocatalyst. Running the reactions in various pH (5-11), indicated that the pH = 8 and 10 or Higher are the optimum pH for photocatalytic degradation of benzylamine and aniline respectively. The effects of some other parameters such as amount of photocatalyst, flux of oxygen and irradiation time were evaluated. Furthermore, the Langmuir-Hinshelwood rate constant k(r) and adsorption constant K(A) for the titled compounds are reported.

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“…[14] The process of photoelectochemical water splitting has been studied extensively. [15][16][17][18] The overall PEC reaction can be described as follows for n-type semiconductor (n-SC) photoelectrodes:…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical Study of Nanostructured ZnO Thin Films for Hydrogen Generation from Water Splitting

Wolcott

Smith

Kuykendall

et al. 2009

Adv Funct Materials

444

246

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Photoelectrochemical cells based on traditional and nanostructured ZnO thin films are investigated for hydrogen generation from water splitting. The ZnO thin films are fabricated using three different deposition geometries: normal pulsed laser deposition, pulsed laser oblique‐angle deposition, and electron‐beam glancing‐angle deposition. The nanostructured films are characterized by scanning electron microscopy, X‐ray diffraction, UV‐vis spectroscopy and photoelectrochemical techniques. Normal pulsed laser deposition produces dense thin films with ca. 200 nm grain sizes, while oblique‐angle deposition produces nanoplatelets with a fishscale morphology and individual features measuring ca. 900 by 450 nm on average. In contrast, glancing‐angle deposition generates a highly porous, interconnected network of spherical nanoparticles of 15–40 nm diameter. Mott‐Schottky plots show the flat band potential of pulsed laser deposition, oblique‐angle deposition, and glancing‐angle deposition samples to be −0.29, −0.28 and +0.20 V, respectively. Generation of photocurrent is observed at anodic potentials and no limiting photocurrents were observed with applied potentials up to 1.3 V for all photoelectrochemical cells. The effective photon‐to‐hydrogen efficiency is found to be 0.1%, 0.2% and 0.6% for pulsed laser deposition, oblique‐angle deposition and glancing‐angle deposition samples, respectively. The photoelectrochemical properties of the three types of films are understood to be a function of porosity, crystal defect concentration, charge transport properties and space charge layer characteristics.

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Semiconductor Electrochemistry

Cited by 217 publications

References 19 publications

Solar Energy Materials

Solar Energy Materials

The Effects of Some Operational Parameters in Photodegradation of Benzylamine and Aniline and Their Kinetics in Aqueous Suspension of TiO₂ and Pt–Loaded TiO₂

Photoelectrochemical Study of Nanostructured ZnO Thin Films for Hydrogen Generation from Water Splitting

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Semiconductor Electrochemistry

Cited by 217 publications

References 19 publications

Solar Energy Materials

Solar Energy Materials

The Effects of Some Operational Parameters in Photodegradation of Benzylamine and Aniline and Their Kinetics in Aqueous Suspension of TiO2 and Pt–Loaded TiO2

Photoelectrochemical Study of Nanostructured ZnO Thin Films for Hydrogen Generation from Water Splitting

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The Effects of Some Operational Parameters in Photodegradation of Benzylamine and Aniline and Their Kinetics in Aqueous Suspension of TiO₂ and Pt–Loaded TiO₂