Dual-Modified Cu2S with MoS2 and Reduced Graphene Oxides as Efficient Photocatalysts for H2 Evolution Reaction

Noble metal-free cocatalysts have drawn great interest in accelerating the catalytic reactions of metal chalcogenide semiconductor photocatalyst. In particular, great efforts have been made on modifying a semiconductor with dual cocatalysts, which show synergistic effect of a fast transfer of exciton and energy simultaneously. Herein, we report the dual-modified Cu2S with MoS2 and reduced graphene oxides (Cu2S-MoS2/rGO). The in situ growth of Cu2S nanoparticles in the presence of MoS2/rGO resulted in high density of nanoscale interfacial contacts among Cu2S nanoparticles, MoS2, and rGO, which is beneficial for reducing the photogenerated electrons’ and holes’ recombination. The Cu2S-MoS2/rGO system also demonstrated stable photocatalytic activity for H2 evolution reaction for the long term.

A Short Review on Raman Studies of Metal Chalcogenide Semiconductor Thin Films

The productions of the thin metallic chalcogenide films are of particular interest for the wide range of fabrication of the solar cells, sensors, photodiode arrays, photoconductors. Raman spectroscopy is used to measure the scattering radiation of a matter. Basically, the spectroscopic methods can be defined as the study of the interaction of electromagnetic radiation with a matter. It can be based on the phenomenon of absorption, fluorescence, emission or scattering. The observation of peaks supported the formation of amorphous or crystalline nature of the samples. In this short review, the authors had gathered some informations about the Raman studies of recently synthesized metal chalcogenide semiconductor thin films.

Unveiling the impurity-modulated photoluminescence from Mn2+-containing metal chalcogenide semiconductor via Fe2+ doping

Doping impurities into Mn2+-doped semiconductors is an important strategy to tune the photophysical properties toward their potential optoelectronic applications. However, the modulation mechanism of Mn2+-related emission affected by specific impurity...