Light photocatalysis and

Xiong Z, Zhang L, Zhao XS (2014) One-step synthesis of metal titania core-shell materials for visible-light photocatalysis and catalytic reduction reaction. Chem Eur J 45 1415-1420... 

Ye Y, Sanford MS (2012) Merging visible-light photocatalysis and transition-metal catalysis in the copper-catalyzed trifluoromethylation of boronic acids with CF3I. J Am Chem Soc 134 9034-9037... 

Adding TEMPO appears to effectively quench protein radieals and thus exert a proteetive aetion. New compounds that release NO under visible light irradiation (nitrosamine) are reported. Further reaetions for functional group introduction or elaboration are the hydrojgramination of algmes under visible light photocatalysis and the photocatalytic acylation of amines. ... 

Teply F (2011) Photoredox catalysis by [Ru(bpy)3] to trigger transformations of organic molecules. Organic synthesis using visible-light photocatalysis and its 20" century roots. Collect Czech Chem Commun 76 859-917... 

Asahi, R., Morikawa, T., Ohwaki, T., Aoki, K., and Taga, Y. (2001) Visible-light photocatalysis in nitrogen-doped titanium oxides. Science, 293 (5528), 269-271. 

Visible Light Photocatalysis by a Titania Transition Metal Complex Horst Kisch, Gerald Burgeih and Wojciech Macyk... 

Kato H, Hori M, Konta R, Shimodaira Y, Kudo A (2004) Construction of Z-scheme type heterogeneous photocatalysis systems for water splitting into H2 and O2 under visible light irradiation Chem Lett 33 1348-1349 Asahi R, Morikawa T, Ohwaki T, Aoki K, Taga Y (2001) Visible light photocatalysis in nitrogen-doped titanium oxide. Science 293 269-271... 

Following the reports of the effect of nitrogen doping anatase, visible light photocatalysis has also been reported for SrTiOs (NO elimination), MOx-ZnO (where M = W, V or Fe for acetaldehyde decomposition), and TaON, 135,136 methanol oxidation ). 

In the case of semiconductor assisted photocatalysis organic compounds are eventually mineralized to carbon dioxide, water, and in the case of chlorinated compounds, chloride ions. It is not unusual to encounter reports with detection of different intermediates in different laboratories have been observed. For example, in the degradation of 4-CP the most abundant intermediate detected in some reports was hydroquinone (HQ) [114,115,123], while in other studies 4-chloro-catechol, 4-CC (3,4-dihydroxychlorobenzene) was most abundant [14,116-118, 121,163]. The controversy in the reaction intermediate identification stems mainly from the surface and hydroxyl radical mediated oxidation processes. Moreover, experimental parameters such as concentration of the photocatalyst, light intensity, and concentration of oxygen also contribute in guiding the course of reaction pathway. The photocatalytic degradation of 4-CP in Ti02 slurries and thin films... 

Because of their properties they are widely used in electrochemistry, in electrophotography, as well as in photocatalysis and photochemical water cleavage. Thus Hennig and Rehorek in 1986 reported the sensitization of photochemical reactions by Prussian blue analogues of molybdenum octacyanide, and Kaneko and his group in 1984 found that water can be photolyzed with visible light in presence of Pmssian blue and tris (2, 2 -bipyridine) ruthenium (II) complex. 

Li, D., H. Haneda, S. Hishita and N. Ohashi (2005a). Visible-light-driven N-F-codoped Ti02 photocatalysts. 2. Optical characterization, photocatalysis, and potential application to air purification. Chemistry of Materials, 17(10), 2596-2602. 

Srinivasan, S., J. Wade and E.K. Stefanakos (2006). Visible light photocatalysis via CdS/Ti02 nanocompositematerials. Journal of Nanomaterials, 2006, 87326(1-7). 

More recently, the various aspects of light-responsive and photoreactive inorganic compounds in biological and bioinspired systems have been addressed (3-6). In the present contribution, some fundamental principles and first advances of the rapidly evolving fields of bioinorganic photochemistry and biomimetic photocatalysis will be discussed. No attempt will be made to provide a comprehensive coverage of the relevant literature, which is widespread across a bunch of different disciplines... 

This review has been written in order to clarify fundamental aspects of photocatalysis, an important subject in inorganic and material chemistry, not to present a list of studies on photocatalysis reported so far, since it seems rather difficult to make a complete review by introducing all or a large part of the reported studies on photocatalysis of relatively long history. This review is based on the author s experience in studies on photocatalysis and topics are limited to so-called semiconductor photocatalysis definition and examples of photocatalysis, its principle and kinetics, visible light-induced photocatalysis, and design of active photocatalysts are discussed in detail. 

Determination of TON requires an estimate of the number of surface-active centres that participate in the reaction on the metal-oxide surface. This has represented a most challenging problem in heterogeneous photocatalysis because heretofore there has been no description of the nature, nor a quantitative determination of the number, of active centres in heterogeneous photocatalysis, and their concentration on the surface of a metal-oxide photocatalyst remains elusive. To complicate matters further, there is also some uncertainty about how much of the surface area of the metal-oxide photocatalyst is irradiated by the incident actinic light, and can therefore be active in photocatalysis. Accordingly, even if the concentration of active centres were known, it would normally be difficult to estimate the number of those centres actually involved in the photochemical events. 

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