By Eric Lichtfouse; Didier Robert; Jan Schwarzbauer
From the contents: Analytical Chemistry.- poisonous Metals.- natural Pollutants.- Polycyclic fragrant Compounds.- Pesticides.- eco-friendly Chemistry.- Ecotoxicology
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Example text
Moreover, the characterization of carbonaceous adsorbents which are commonly used to remove hazardous compounds from environment (water or air) or as supports for precious metal particles is not usually considered as an easy task, because of the ill-defined character of carbon and the coexistance of many kinds of oxygenated groups on the surface. Direct information on the structure of the bulk of carbon materials, the presence of various surface functional groups, and on mineral absorption and electronic absorption may be obtained by the way of infrared spectroscopic studies.
Heintz · D. Robert · J. Zawadzki · J. V. 4 Chemisorption of Acids and Phenols on TiO2 Due to its ability to be either an efficient carrier for precious metals or a photocatalyst for the degradation of pollutants in wastewater, titanium dioxide has attracted much attention these last years. It is well known that the type of interactions between the organic molecules in solution and the hydroxyl surface groups of the solid photocatalyst has an important influence on both the mechanisms of degradation and catalytic performances.
Additional coupling with the electron dispersive X-ray probe (EDX) can show the spatial elemental distribution on the supports or even of a mineral grain and its surrounding vicinity. g. gold or carbon. It will provide the same data as a conventional SEM (with attached EDX probe) but will have the same nondestructive benefits like the XRF method with a possible further use of the samples. A more mineral specific analytical method is the infrared Raman spectroscopy in conjunction with a infrared microscope.