Layered double hydroxides (LDHs), also known as hydrotalcite-like anionic clay compounds, have attracted increasing interest in electrochemical energy storage, in the main form of LDH precursor-derived transition metal oxides (TMOs). One typical approach to improve cycling stability of the LDH-derived TMOs is to introduce one- and two-dimensional conductive carbonaceous supports, such as carbon nanotubes and graphene. We herein demonstrate an effective approach to improve the electrochemical performances of well-dispersed biactive NiCoS/NiS as anode nanomaterials for lithium-ion batteries (LIBs), by introducing a three-dimensional graphene aerogel (3DGA) support. The resultant 3DGA supported NiCoS/NiS (3DGA/NCS) composite, obtained by sulfuration of NiCo-layered double hydroxide (NiCo-LDH) precursor in situ grown on the 3DGA support (3DGA/NiCo-LDH). Electrochemical tests show that the 3DGA/NCS composite indeed delivers the greatly enhanced electrochemical performances compared with the NiCoS/NiS counterpart on two-dimensional graphene aerogel, i.e., a high reversible capacity of 965 mA h g after 200 cycles at 100 mA g and especially a superlong cycling stability of 620 mA h g after 800 cycles at 1 A g. The enhancements could be ascribed to the compositional and structural advantages of boosting electrochemical performances: (i) well-dispersed NiCoS/NiS nanoparticles with interfacial nanodomains resulting from both the dual surface confinements of the 3DGA support and the crystallographic confinement of NiCo-well-arranged LDH crystalline layer, (ii) an appropriate specific surface area and a wide pore size distribution of mesopores and macropores, and (iii) highly conductive 3DGA support that is measured experimentally by using electrochemical impedance spectra to underlie the enhancement. Our results demonstrate that the tunable LDH precursor-derived synthesis route may be extended to prepare various transition metal sulfides and even transition metal phosphides for energy storage with the aid of tunable cationic type and molar ratio.

Bimetallic sulfide ((Ni0.3Co0.7)9S8) nanoparticles confined by dual-carbon nanostructures are prepared by pyrolyzing a mixture of surfactant-intercalated layered double hydroxide and melamine, and deliver a highly reversible capacity and decent rate capability as anode nanomaterials for lithium- and sodium-ion batteries.

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This study aimed to evaluate the ability of the Lactobacillus rhamnosus strain LC‐4 to bind aflatoxin M1 (AFM1) in phosphate‐buffered saline (PBS) and yogurt. Bacterial cells were subjected to heat, acid, and alkali treatments. The AFM1‐binding rate of acid‐treated bacteria was of 78.63 ± 0.52%. The binding of L. rhamnosus LC‐4 to AFM1 was partially reversible and the binding of AFM1 was more stable when treated bacteria were used. The involved components of the cell wall in AFM1 binding were determined, with peptidoglycan playing a critical role. The integrity of the bacteria was also highly important for detoxification ability, and this ability was influenced by different factors such as temperature, pH, and toxin concentration, and so on. L. rhamnosus LC‐4 retained its detoxification ability in yogurt. The pH and bacterial concentration slightly affected the binding of AFM1 to L. rhamnosus LC‐4 during storage time. These results indicate that L. rhamnosus LC‐4 may be applied to reduce the concentration of AFM1 in yogurt. Practical Applications In the present work, we determined the involved components of the cell wall in AFM1 binding and different factors influencing the binding process. The integrity of the cell wall is indispensable for AFM1 binding and peptidoglycans were critical components. Understanding the mechanism of AFM1 binding by probiotic bacteria is contributed to further optimizing decontamination processes. Our study provides potential future applications to reduce AFM1 bioavailability by L. rhamnosus LC‐4 in yogurt.