Visible‐Light‐Mediated Oxidative Amidation of Aldehydes by Using Magnetic CdS Quantum Dots as a Photocatalyst
Ling Xu, Shuai‐Zheng Zhang, Wei Li, Zhan‐Hui Zhang
Abstract
Abstract A magnetic CdS quantum dot (Fe 3 O 4 /polydopamine (PDA)/CdS) was synthesized through a facile and convenient method from inexpensive starting materials. Characterization of the prepared catalyst was performed by means of FTIR spectroscopy, XRD, SEM, TEM, energy‐dispersive X‐ray spectroscopy, and vibrating‐sample magnetometer techniques. Fe 3 O 4 /PDA/CdS was found to be a highly active photocatalyst for the amidation of aromatic aldehydes by using air as a clean oxidant under mild conditions. The photocatalyst can be recovered by magnetic separation and successfully reused for five cycles without considerable loss of its catalytic activity.
Topics & Concepts
PhotocatalysisCatalysisQuantum dotFourier transform infrared spectroscopyMagnetometerSpectroscopyMaterials scienceVisible spectrumMagnetic separationPhotochemistryChemistryChemical engineeringNuclear chemistryNanotechnologyOrganic chemistryOptoelectronicsMagnetic fieldMetallurgyPhysicsEngineeringQuantum mechanicsSulfur-Based Synthesis TechniquesChemical Synthesis and ReactionsRadical Photochemical Reactions