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The improvement of the solar energy conversion efficiency is important for the solar hydrogen production using semiconductor photoelectrodes. In this paper, the photoelectrochemical properties of multi-layer composite photoelectrodes of thin film BiVO 4 in various electrolyte solutions were investigated in detail. The improvement of photocurrent and the decrease of onset potential were observed...
Acid–base properties of 3-[2-(2-pyridyl)benzoxazol-5-yl]alanine and 3-[2-(4-pyridyl)benzoxazol-5-yl]alanine as well as a model compound without heterocyclic substituent (3-[2-(4-methylphenyl)benzoxazol-5-yl]alanine) were studied by means of absorption and fluorescence spectroscopy as well as theoretical calculations. It was found that basicity of heterocyclic derivatives in the ground and excited...
Supramolecular host–guest interaction of acridine dye, a biologically important molecule, with β and γ cyclodextrin (βCD and γCD, respectively) macrocycles has been investigated in aqueous solution using photophysical methods. Neutral form (Ac) of the dye undergoes significant interaction with βCD and γCD hosts, forming mainly the 1:1 stoichiometric host–guest complex. Fluorescence intensity and lifetime...
This study focuses on the photocatalytic oxidation of decane at ppb levels, close to indoor air conditions. Although these concentrations are typical of indoor air volatile organic compound (VOC) levels, such conditions have been poorly investigated to date. Decane conversion rates higher than 90% were reached within 15h for the highest initial concentration tested in the operating conditions used...
Silver nanoparticles (AgNPs) are currently among the most widely used man-made nanomaterials, present in a huge range of consumer products. Here we report a simple ‘green’ method of AgNP synthesis of using an anionic surfactant without use of any additional reducing agents. It was observed that synthesis of AgNPs at room temperature (25–35°C) using sodium dodecyl sulphate (SDS) and sunlight. The nanoparticles...
Steady-state and time-resolved emission spectra were measured to study the relaxation of all-trans retinoic acid (ATRA) from its excited-states in a number of solvents. We found that the time-resolved emission signal is composed of three decay components arising from three different excited-states. The ultrafast component that is shorter than 80fs is dominant at λ≤500nm, whereas the intermediate component...
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