Carbon nanomaterials are robust and possess fascinating properties useful for separation technology applications, but their scalability and high salt rejection when in a strong cross flow for long periods of time remain challenging. Here, we present a graphene-based membrane that is prepared using a simple and environmentally friendly method by spray coating an aqueous dispersion of graphene oxide/few-layered graphene/deoxycholate. The membranes were robust enough to withstand strong cross-flow shear for a prolonged period (120 h) while maintaining NaCl rejection near 85% and 96% for an anionic dye. Experimental results and molecular dynamic simulations revealed that the presence of deoxycholate enhances NaCl rejection in these graphene-based membranes. In addition, these novel hybrid-layered membranes exhibit better chlorine resistance than pure graphene oxide membranes. The desalination performance and aggressive shear and chlorine resistance of these scalable graphene-based membranes are promising for use in practical water separation applications.

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H2O2treatment can decrease the electrical resistivity of double walled carbon nanotube fibers. The experimental observations suggest that small diameter carbon nanotubes are removed from the fiber sample.

The environmentally friendly and high efficient method for growing multi-walled carbon nanotubes (T) was developed by using naturally abundant resources: stone garnet powder (G) as a catalyst and support, and city gas-based natural gas as the carbon source

The morphology of silver crystals grown at the liquid-liquid interface between silver nitrate and ascorbic acid solutions was investigated in the presence of various organic molecules. The addition of ethylenediamine tetraacetate changed the morphology from dendrites and plates into single-crystalline wires with a width of 100-1000 nm. The wires were produced by elongation and stacking of planar silver crystals exhibiting {111} faces. The anisotropic growth behavior causing the wire formation is tentatively ascribed to stepwise capping of the specific surfaces of silver crystals by organic molecules having multiple carboxyl groups.