Nanjing Tech University

About: Nanjing Tech University is a education organization based out in Nanjing, China. It is known for research contribution in the topics: Catalysis & Membrane. The organization has 21827 authors who have published 21794 publications receiving 364050 citations. The organization is also known as: Nangongda & Nánjīng Gōngyè Dàxúe.

Triphase Microfluidic-Directed Self-Assembly: Anisotropic Colloidal Photonic Crystal Supraparticles and Multicolor Patterns Made Easy

Abstract: However, it is stilla great challenge to mount or shape CPCs into a desiredmorphology (e.g., spheres, Janus, ellipsoids, and dumbbell-like supaparticles); efficient pathways are needed to selec-tively endow CPCs with versatile functions whilst preservingtheir original optical properties.Herein, we developed a triphase microfluidic-directedself-assembly to construct CPC supraparticles with control-lable and predictable shape, and selectively introducedadvanced functions to them. The triphase microfluidictechnique is a co-flowing system that produces continuousmicrodroplets comprising two immiscible phases. By adjust-ing the interfacial tension of each phase in the microfluidicsystem, CPC supraparticles with tunable shape, varying fromcrescent, meniscus, and ellipsoid to spherical were preparedbytheself-assemblyofthemonodispersecolloidalparticlesinthese microdroplet templates. Importantly, studying theinterfacechemistryindicatedthatthestructureofthebiphasicmicrodroplets and the resulting CPCs might be predicted inour strategy. The further introduction of photoinducedconsolidation into the triphase microfluidic system yieldedcore–shell or Janus CPC superstructures. The encapsulationof magnetic nanoparticles created Janus CPC supraparticleswith superparamagnetism and a photonic bandgap in twodistincthemispheres.ThesemultifunctionalJanusCPCsupra-particles exhibit “Dark” and “Light” switchable behaviorsunder an external magnetic field, and thus can be processedinto rewritable and color-tunable photonic patterns. To ourknowledge, this is the first example of the utilization of thetriphase microfluidic technique for the design of anisotropicCPCs. This facile strategy can be extended to build up aseriesofnovelmultidimensionalcolloidalstructures,withtheaimofcollecting colloidal particles and orgnizing them into func-tional materials for pratical application.Figure 1a illustrates the fabrication of shape-controllableCPC supraparticles in a triphase microfluidic flow-focusingdevice composed of a cylindrical polydimethylsiloxane(PDMS) capillary and a pair of inner cylindrical 25G steelneedles. We chose three immiscible fluids, an aqueoussolution of monodisperse polystyrene (PS) microspheres in

Cosorption of Phenanthrene and Mercury(II) from Aqueous Solution by Soybean Stalk-Based Biochar

Abstract: Soybean [Glycine max (L.) Merr.] stalk-based biochar was prepared using oxygen-limited pyrolysis. We evaluated phenanthrene (PHE) and Hg(II) sorption, from single and binary component solutions, onto prepared biochar. We found that the prepared biochar efficiently removed PHE and Hg(II) from aqueous solutions. The isotherms for PHE and Hg(II) sorption could be described using linear and Toth models, respectively, both with high regression coefficients (R2 > 0.995). When PHE and Hg(II) coexisted in an aqueous solution, we observed direct competitive sorption, each one suppressing another. Our results provide insight into the recycling of agricultural residues, and also a new application for removal of polycyclic aromatic hydrocarbons and heavy metals from contaminated water utilizing biochar from agricultural residue.

Graphene and graphene-based composites as Li-ion battery electrode materials and their application in full cells

Abstract: In recent years, graphene has been considered as a potential “miracle material” that will revolutionize the Li-ion battery (LIB) field and bring a huge improvement in the performance of LIBs. However, despite the large number of publications every year, practical prototypes of graphene-based batteries are still few and no commercial products have entered large-scale production so far. In this review, we will start from a brief introduction of the working mechanism of LIBs, important concepts such as the solid–electrolyte interface (SEI), graphene and the production methods of graphene and graphene based composites followed by the review of graphene and graphene composites as electrode materials, highlighting the role graphene plays in the composite materials and the advantages and drawbacks of these materials. The previous sections laid the foundation of the focus of discussion, which is the application of graphene based materials in full cell prototypes, the difficulties they face and efforts to solve the various problems preventing the implementation of graphene based materials in practical commercial cells.