Showing papers by "Michael Grätzel published in 1985"
475 citations
TL;DR: In this paper, it was shown by extended Huckel MO calculations on model complexes that the energy levels of the lowest unoccupied molecular orbitals involving predominantly the 3dτ orbitals xy, xz and yz of Ti are sensitive to lattice structure.
82 citations
TL;DR: In this paper, the authors presented a method to construct an LPI-ARTICLE-1985-027, which is used in the Web of Science Record (WORR).
59 citations
TL;DR: In this article, the authors present a Web of Science Record created on 2006-02-21, modified on 2016-08-08, for the LPI-ARTICLE-1985-008.
Abstract: Reference LPI-ARTICLE-1985-008doi:10.1002/hlca.19850680623View record in Web of Science Record created on 2006-02-21, modified on 2016-08-08
44 citations
TL;DR: The photogenerated electron/hole pairs in excited CdS, produced by irradiation (355 nm) from a Nd:YAG mode-locked laser, yield a luminescence which decays in ≤ 30 ps.
43 citations
01 Feb 1985
TL;DR: In this article, photouptake of oxygen in aqueous CdS suspensions loaded with RuO2 or Rh2O3 leads to the formation of sulphate and cadmium ions following the stoichiometry.
Abstract: Photouptake of oxygen in aqueous CdS suspensions loaded with RuO2 or Rh2O3 leads to the formation of sulphate and cadmium ions following the stoichiometry
This reaction constitutes also the dominant pathway in bare CdS suspensions In the latter case, hydrogen peroxide is formed as a byproduct
42 citations
TL;DR: In this article, it was shown that the performance of a system containing "naked" CdS in combination with RuO2-loaded TiO2 particles is far better than that of Cd S/RuO2 alone.
34 citations
TL;DR: In this paper, a dye sensitization of wide bandgap semiconductors to improve their spectral response to visible light has been discussed and three examples from their recent work have been presented, in which the semiconductor particle surface (TiO 2 ) has been modified by adsorption of various dye molecules and by surface derivatization with ruthenium(II) complexes.
32 citations
TL;DR: In this article, an n-type semiconductor, haematite iron oxide (α-Fe2O3), has been shown to corrode in the presence of chloride anion in aqueous acidic media when in powder suspension.
Abstract: Haematite iron oxide (α-Fe2O3), an n-type semiconductor, has been shown to corrode in the presence of chloride anion in aqueous acidic media when in powder suspension. The rate of corrosion was enhanced by a factor of ten upon band-gap excitation using visible light. Surface adsorption and ease of complex formation with solution species are shown to be a major factor in the dissolution process. A mechanism for dissolution is proposed and implications for iron oxide powder photocatalysis are assessed.
29 citations
TL;DR: Etude de polysavons derives de la polyvinyl-4 pyridine fonctionnalises avec le trisbipyrydyl ruthenium comme sensibilisants a la lumiere visible for the formation d'hydrogene catalytique par le photocatalyseur TiO 2 platinise as discussed by the authors.
Abstract: Etude de polysavons derives de la polyvinyl-4 pyridine fonctionnalises avec le trisbipyrydyl ruthenium comme sensibilisants a la lumiere visible pour la formation d'hydrogene catalytique par le photocatalyseur TiO 2 platinise. Des moities viologenes sont incorporees dans le polymere pour examiner leur role comme relai electronique interne
15 citations
Journal Article•
01 May 1985
TL;DR: The rate constants for the iron(II)-thionine and surfactant thionine system have been determined in aqueous solution, SDS micelles, and in a mineral oil-in-water microemulsion stabilized by sodium cetyl sulfate (SCS) and 1-pentanol.
Abstract: The rate constants for the iron(II)-thionine and surfactant thionine system have been determined in aqueous solution, sodium dodecyl sulfate (SDS) micelles, and in a mineral oil-in-water microemulsion stabilized by sodium cetyl sulfate (SCS) and 1-pentanol The triplet lifetimes are all in the range 7–9 μs The rate constant for electron transfer quenching of triplet thionine by iron(II) is higher in the anionic media due to a higher local Fe2+ concentration However, the back reaction between semithionine and iron(III) is not similarly enhanced in the presence of micelles or microemulsion The dismutation of semithionine is a little slower in microemulsion than in water, but over two orders of magnitude slower in SDS micelles The quantum yield of thionine triplet formation, determined for surfactant thionine in SCS microemulsion, approaches unity
TL;DR: In this paper, the photoprocesses of N-vinyl carbazole (NVC) solubilized in the interior of an oil-in-water microemulsion (CTA-ci, hexadecyltrimethylammonium counter ion) functionalized by an oxidizing agent, S2O2−8, were studied using ruby laser and spectrofluorimeter techniques.
01 Jan 1985
TL;DR: In this article, the authors describe some important features of interfacial charge transfer reactions in colloidal semiconductor systems, including electron and hole transfer from small semiconductor particles to acceptors in solution or adsorbed to the semiconductor.
Abstract: This paper describes some important features of interfacial charge transfer reactions in colloidal semiconductor systems. Both electron and hole transfer from a small semiconductor particle to acceptors in solution or adsorbed to the semiconductor are considered. These events are studied by exciting the particle (TiO2 or CdS were used in most cases) with a short laser pulse and applying kinetic spectroscopy to analyze the temporal behavior of transient species. The same techniques can be applied to study electron injection from a photo-excited dye into the conduction band of the semiconductor. Detailed analysis of this process was performed using eosin/colloidal TiO2 as a model system. These studies allow also for an analysis of intraparticle back electron transfer from the conduction band of TiO2 to the adsorbed eosin cation. Furthermore, the trapping of conduction band electrons by noble metal deposits can be analyzed kinetically. Applications of these systems to decompose water by visible and UV light are given.