Facet Engineering-Induced Construction of Ni2P/ZnIn2S4 Heterostructures for Boosted Photocatalytic CO2 Reduction.

Facet engineering was realized to enhance the CO2 photoreduction performance of the Ni2P/ZnIn2S4 heterostructure, in which the commonly exposed (1 0 2) face of ZnIn2S4 was converted to the (1 0 1) face due to the unique properties of the phosphide. The variation in the crystal plane strengthened the intense interfacial contact between Ni2P and ZnIn2S4, resulting in the promotion of utilization and absorption efficiency for incident light and boosting the surface reaction rate. Combined with the significant metallicity of Ni2P, inhibited recombination and strengthened transfer efficiency were achieved, leading to an obvious enhancement of photoreduction activity over Ni2P/ZnIn2S4 compared to pure samples. In particular, the optimal NZ7 composite (the mass ratio of Ni2P to ZnIn2S4) reached 68.31 µmol h-1 g-1 of CH4, 10.65 µmol h-1 g-1 of CH3OH, and 11.15 µmol h-1 g-1 of HCOOH. The mechanism of the CO2 photoreduction process was elucidated using ESR and in situ DRIFTS techniques.

Biomass-based indole derived composited with cotton cellulose fiber integrated as sensitive fluorescence platform for NH3 detection and monitoring of seafood spoilage.

Herein, an indole-derived water-soluble fluorescence nanomaterial and biomass-based cellulose filter paper integrated as solid-state fluorescence platform (H2-FP) for seafood spoilage detection was prepared. H2 exhibits high fluorescence stability and good biocompatibility with green beans, onion tissues, blood and zebrafish, which proving that H2 has a wide range of application scenarios. Further, H2-FP with effective, solid-state fluorescence, portable, and reusable characteristics is nanoengineered for NH3 quantitative and qualitative detection (DOL = 2.6 ppm). Then, H2-FP has been successfully used to monitor NH3 release in the seafood spoilage process at various storage time (4 °C and 25 °C). More importantly, fluorescence color of H2-FP is integrated smartphone are converted to digital values through RGB channels and successfully used to visualize semi-quantitative recognition of NH3. This sensing fluorescence platform integrated with smartphone furnishes an effective fabrication strategy and broad prospects for explore various biomass-based materials for sensing NH3 change in biological and environmental samples.

Surface engineering of ultrasmall supported PdxBi nanoalloys with enhanced electrocatalytic activity for selective alcohol oxidation.

Ultrasmall and homogeneous bimetallic PdxBi nanoalloys are well distributed on a Vulcan carbon support by a facile, low-cost synthetic strategy. The electrochemical activity of the as-prepared homogeneous PdxBi nanoalloy/carbon black nanocomposites is closely related to the content of Bi, revealing their excellent electrocatalytic performance for selective oxidation of monohydric alcohols and vicinal diols in alkali medium.