A Facile Synthesis of BiO(ClBr)_0.5−x/2I_x Microsphere Assembly as High‐efficiency Visible‐light Driven Photocatalyst

Abstract

Using a facile refluxing synthesis, a series of BiO(ClBr) 0.5À x/2 I x solid solutions was prepared and applied as photocatalysts for the degradation of organic pollutants. The synthesized solid solutions crystallized in microspheres are constructed by nanoplates which transform into nanosheets for increasing iodine ions contents. Furthermore, introducing iodine ions significantly decreased the optical bandgap of the obtained solid solutions. The photocatalytic activity of these samples over the degradation of Rhodamine B indicates the highest performance of the solid-solution at x = 0.2 with a decomposition efficiency of 92.6 % for 120 mins of reaction under the light emission diode (LED) irradiation which is much higher than that of pure sample and BiOCl 0.5 Br 0.5 . This enhancement in photocatalytic performance was attributed to the effective separation of photo-induced electron-hole pairs.

Regio‐ and Chemoselectivity of Tandem N‐Ketoalkylation/Cyclization of 2‐Thioxoimidazoline‐4‐One

“…To the best of our knowledge, prior to the present study, there had been no report on the alkylation of thiohydantoin or its derivatives with α‐iodoketones that might lead to the corresponding salts. The need for the salts of heterocyclic compounds is determined by the growing interest in these compounds due to wide application in different fields of science and technology [32–34] . With this in mind, the aim of the present work was to investigate the reactions of thiohydantoin with aliphatic, aromatic, and heteroaromatic α‐iodoketones, and to explore the possibility of cyclization of the expected alkylation products.…”