Ag-containing semiconductors have attracted significant attention because of the unique photosensitivity 5 that provides these materials with visible-light photocatalytic activity. This study systematically investigates the correlation among the photophysicochemical performance, crystal structure, electronic structure, and photocatalytic activity and stability of three Ag-containing photocatalysts Ag 2 MO 4 (M = Cr, Mo, W) prepared by microemulsion based on experimental and theoretical results. Results showed that the photocatalytic activity and stability of the three photocatalysts strongly depend on the light 10 absorption performance of these photocatalysts. Ag 2 CrO 4 had the best light absorption performance, exhibiting the highest photocatalytic activity for methylene blue degradation under visible-light irradiation that is 3.5 and 1.5 times those of Ag 2 MoO 4 and Ag 2 WO 4 , respectively. Meanwhile, the photocatalytic stability followed the same light absorption performance order. The theoretical calculation showed that stronger crystal field and smaller Ag-O distance lower the conduction band bottom of 15 Ag 2 CrO 4 and Ag 2 WO 4 , respectively. This reduction in conduction band caused the band gap, lightabsorption, and subsequent photocatalytic activity and stability of these photocatalysts to differ. The present work contributes to deeply understand and feasibly construct Ag-containing photocatalysts with high photocatalytic activity. 65 angle. 13 Kato et al. have concluded that Ag + is significant to construct photocatalysts with narrow band gaps, which decrease because of a hybrid orbital of Ag 4d and O 2p that form a valance band (VB) at a more negative level than O 2p orbitals. 8 Ma et al. have reported the role of an effective mass of carrier in the 70 photocatalytic activity of silver halide-based Ag@AgX (X = Cl,
Electrode design strategies that aim to increase the electrochemical performance of Li‐ion batteries (LIBs) play a key role in tapping into the power of the energy transformations involved. Metal‐organic frameworks (MOFs) have attracted scientific interest as electrode materials for LIBs, while the utilization of pristine MOFs is hindered by limited conductivity and stability, partly due to their lack of hierarchically structured pores. Herein a hydrothermal‐mechanical synthesis is reported by combining the one‐pot chemical fabrication of Ni3(2,3,6,7,10,11‐hexaiminotriphenylene)2 sheets and particles, and the mechanical assembly of these building blocks to improve electrical conductivity is also described. The as‐prepared ensemble (denoted as NHM) exhibits a Tostadas‐shaped structure with enriched ultramicropores and micropores. The charge‐discharge profile of NHM gives a superior reversible capacity of 1280 mA h g−1 after 100 cycles at the rate of 0.1 A g−1, surpassing the state‐of‐art pristine MOFs‐based anodes. Moreover, NHM is capable of maintaining 392 mA h g−1 at 1 A g−1 after 1000 cycles, the completion of a stability test in coin cell‐powered light emitting diodes further visualizes the remitted capacity fading of NHM. This work breaks through the limitation of capacity for pristine MOFs, providing a new pathway for achieving better energy conversion and storage.
Here, we report the two-dimensional (2D) Ni-Co hydroxide monolayers (NiCo-HMs) as a highly active cocatalyst for enhancing photocatalytic H2 evolution of 2D g-C3N4 nanosheets. The NiCo-HMs can expand the interface...
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