Spatial charge separation on the (110)/(102) facets of cocatalyst-free ZnIn₂S₄for the selective conversion of 5-hydroxymethylfurfural to 2,5-diformylfuran

Abstract

Photorefining of biomass and their derivatives to value-added chemicals is an alternative solution to address global energy shortage and environmental issues. Herein, efficient and selective oxidation of 5-hydroxymethylfurfural (HMF, 91.1%...

Bi2Fe4O9@ZnIn2S4 S-scheme laminated heterojunction photocatalyst towards optimized photocatalytic performance

“…3e, the In 3d spectrum is divided into two evident peaks, respectively, assigned to 3d 3/2 (452.6 eV) and 3d 5/2 (445 eV) of In. 31 As shown in Fig. 3f, the S 2p spectrum is divided into two evident peaks, respectively, assigned to 2p 1/2 (162.8 eV) and 2p 3/2 (161.7 eV) of S. 32 A decrease or increase in the electron density can result in an increase or decrease in the electron binding energy of the elements, namely the decrease or increase of the binding energy is due to the atom gaining or losing electrons.…”

Single Cobalt Atoms Induced Molecular O2 Activation for Enhanced Photocatalytic Biomass Upgrading on ZnIn2S4 Nanosheets

“…In the former oxygen-free case, photocatalytic selective oxidation of HMF molecules is accompanied by simultaneous hydrogen evolution. , Nevertheless, this process usually suffers from a low conversion of HMF and low selectivity of targeted products. In order to improve the conversion of HMF, additional oxidants are required to accelerate the photocatalytic reaction. , Thus, in the latter oxygen-present case, photocatalytic aerobic oxidation of HMF is facilitated by the existence of more reactive oxygen species (ROS), leading to high conversion of HMF molecules. − Despite much progress, great challenges still remain in photocatalytic selective aerobic oxidation of HMF molecules: (i) On the one hand, a lack of appropriate active sites makes it difficult to activate molecular O 2 , thereby resulting in the unsatisfied yield and selectivity of target products. (ii) On the other hand, understanding the exact active sites at the atomic scale needs to be clarified, which is of paramount significance to reveal the underlying mechanism in photocatalytic selective HMF oxidation.…”

Hollow NiP–ZnIn2S4 Heterojunction for Simultaneous Hydrogen and Pyruvic Acid Production from Lactic Acid Photoreforming

“…Having suitable band gaps, chalcogenide semiconductors are ideal candidates for photocatalytic applications. − In particular, ZnIn 2 S 4 is a nontoxic and stable ternary metal chalcogenide with a narrow band gap suitable for absorbing visible light. − Moreover, the pristine two-dimensional morphology endows ZnIn 2 S 4 with a high surface area, sufficient active sites, and a shortened immigration path of photogenerated charge carriers . However, the problems associated with this chalcogenide in its pristine state are its high hydrogen evolution overpotential and the high tendency of photogenerated electron/hole pairs to recombine .…”