Shunde Polytechnic

Herein, a surface-enhanced Raman scattering (SERS) substrate with good sensitivity and reproducibility is fabricated by using a "one-step" process.Patterned Au nanostructures were generated employing copolymer brushes as templates, subsequently undergoing the reduction of AgNO₃.Impressively, the entire exptl. procedure eschews intricate synthesis steps or the necessity for stabilizer additives.The resultant Ag shell layer evenly encapsulates the Au core, yielding densely packed Ag-coated Au (Au@Ag) nanoparticles.These patterned Au@Ag nanoparticle assemblies exhibited remarkable Raman performance, achieving a min. concentration of detection of 100 pM and an average enhancement factor of 8.8 x 109 when using 4-mercaptobenzoic acid served as the probe mol.Exptl. outcomes and analyses pertaining to thiram, methylene blue, and rhodamine 6G (R6G) confirm the substrate's pronounced Raman effect and its broad range of potential applications.

In this paper, tin-carbon composites were prepared by the hot carbon reduction method and used as anode materials for lithium-ion batteries. The results show that the hot carbon reduction method can effectively reduce SnO2 to spherical metallic tin, and the excess of carbon affects the size and shape of tin spherical particles. The higher the tin content is, the higher the lithium intercalation potential of the anode material is. The improvement of cyclic stability of tin-carbon composites is at the expense of reversible capacity. The core-shell structure of pitch pyrolysis carbon can effectively inhibit the reversible capacity decay caused by tin volume expansion.

Soy protein isolate-based double network spheres (SPIDNS) were designed and adopted for the first time for Rhodamine B (RhB) dye removal from wastewater.The SPIDNS were prepared through the aziridine crosslinker and the Ca²⁺ ionic double crosslinking method with major crosslinking agents of soy protein isolate and sodium alginate, in which aziridine crosslinker was also employed as a modifier to regulate the mech. strength.The physicochem. properties of the materials were explored by numerous technologies, including SEM NMR, FT-IR, and XPS, which confirmed the chem. and phys. crosslinked networks of SPIDNS being established after aziridine crosslinker and Ca²⁺ ionic crosslinking process.Adsorption performances for RhB removal were investigated under various conditions by using SPIDNS with different dosages of aziridine crosslinker for 0%, 1.8%, 3.6%, 5.3%, 6.9%, and 8.5%.Exptl. results demonstrated that the mech. stability of the adsorbent was enhanced with increasing the amount of aziridine crosslinker from 0% to 8.5%; whereas, the adsorption capacity decreased from 190 to 120 mg/g.Therefore, a compromise between the removal efficiency and the mech. strength should be taken into account.Studies of adsorption kinetics, isotherms, and thermodn. displayed that the spontaneous RhB adsorption on SPIDNS was well described by a pseudo-second-order kinetic model and Langmuir isotherm model with monolayer adsorption behavior, for which both the correlation coefficients R² were higher than 0.99.Moreover, electrostatic interactions between the pos. charged RhB mols. and the neg. charged SPIDNS were proposed as the principal adsorption mechanism, which was confirmed by Zeta potential anal.The good mech. stability and spherical porous structure make the SPIDNS with reliability and potential for practical application.