Hierarchical In₂S₃/CdIn₂S₄ Heterostructured Nanohybrids as Photocatalyst for Coupling of Benzyl Amines under Visible Light

Abstract

It is a more attractive strategy that the selective oxidation of amines to the corresponding imines driven by visible light and photocatalyst. However, it is still necessary to look further into the mechanism of the transformation. In order to advance a new green photocatalysts system under milder conditions, hierarchical In 2 S 3 nanotubes, which maintained the mother skeleton of NH 2 -MIL-68(In), was prepared from NH 2 -MIL-68(In) and thiourea, and a cation exchange method was used to synthesize hierarchical In 2 S 3 /CdIn 2 S 4 heterostructured composites. The structure, morphology and photoelectric properties of the catalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS), fluorescence spectroscopy (PL) and electrochemical impedance spectra (EIS) analysis. The results showed that the existence of heterojunction between In 2 S 3 and CdIn 2 S 4 could minimize the recombination rate of photogenerated electron-hole pairs, which made the In 2 S 3 /CdIn 2 S 4 show superior catalytic activity. The results of the evaluated experiments under visible light illumination showed that lots of synergy existed between the hierarchical structure, and the heterostructure could help to enhance the efficiency of carriers transfer and separation, which resulting in a high photo-

Ion Sputtering–Assisted Double‐Side Interfacial Engineering for CdIn2S4 Photoanode toward Improved Photoelectrochemical Water Splitting

“…Metal sulfides are promising candidates as photoanodes due to their good light absorption properties, high photocatalytic performance, and easy fabrication . Nevertheless, these benefits are counterbalanced by various disadvantages, including low conductivity, serious charge recombination originating from high structural and surface defects, and sluggish OER kinetics .…”