Platinum 1,10-phenanthroline: Photosensitizer for photocatalytic degradation of 4-chlorophenol

Abstract

KEYWORDSIt is more economic to apply photodegradation of organic pollutants in presence of the visible light irradiation (sunlight) than applying more costfull ultraviolet lamps. Hence, platinum 1,10-phenanthroline complex has been prepared and tested as a photosensitizer for photodegrading 4-chlorophenol in water, which has been found almost completely achieved (98.5 %) after three hours of visible irradiation. Nevertheless, irradiation at 364 and 254 nm exhibits lower efficiencies. At visible irradiation, the platinum complex gives the highest activation of singlet state oxygen formation ( 1 O2) compared to 364 and 254 nm irradiation as supported by electron para-magnetic resonance data. On the other hand, the behavior of formation and disappearance of photodegradation intermediates: hydroquinone, benzoquinone, hydroxybenzoquinone, using the platinum complex applying the three current irradiations are found to supports these findings. However, organic acids have accumulated as a function of irradiation time and hence considered to be rate-controlling.Photosensitizer 1,10-phenanthroline 4-Chlorophenol Pt-complex Photodegradation 1 O2

Investigation of ZnTiO3/TiO2 composites and their application in photocatalysis

“…Over the past decades, titanium dioxide (TiO2) has attracted considerable scientific interest in the field of photocatalysis, due to the outstanding properties such as low cost, photochemical stability and security [1,2]. However, due to its large band gap (TiO2 ~3.2 eV) [3], TiO2 can only work under UV irradiation, which greatly restricts the use of sunlight as an energy source for photoreactions since only about 3-4% of the solar spectrum falls within the UV range [4][5][6]. In addition, high recombination rate of electron-hole pairs lowers its photocatalytic efficiency [7].…”

Synthesis of 1-(2-Methoxybenzyl)-1,10-phenanthrolin-1-ium Bromide from Gandapura Oil

“…In organic chemistry, the ligand properties of 1,10-phenanthroline and its derivatives are often employed in transition metal-catalyzed-reactions [2]. Another report showed that the complex of platinum-1,10-phenanthroline was used as photosesitizer in the degradation of 4-chlorophenol [3]. Several 1,10-phenanthroline derivatives also displayed good biological activities as antibacterial [4] and antiplasmodium [5,6].…”