A Cu-doped zeolite ZSM-5 (Cu-ZSM-5-M) with a micro-meso-macroporous structure was directly synthesized, and it exhibits excellent catalytic activity and good recyclability in the cross-coupling of aryl halides with diphenyl disulfides. This feature should be attributed to the structural characteristics of meso-macropores and homogeneous dispersion of active Cu(δ+) (δ < 2) species in Cu-ZSM-5-M.

Graphene is a leading contender for the next-generation electronic devices. We report a method to produce graphene membranes in the solution phase using polymeric imidazolium salts as a transferring medium. Graphene membranes were reduced from graphene oxides by hydrazine in the presence of the polyelectrolyte which is found to be a stable and homogeneous dispersion for the resulting graphene i...

The formulation of Lagrangian stochastic models for geophysical flows characterised by non homogeneous conditions nees to satisfy the so-called “well mixed condition”. Simplified formulations are used sometimes in literature generally associated to atmospheric and/or oceanic flows. The simplifications introduced lead to anomalous dispersion conditions. Some simple case is discussed, assessing t...

The present study aims at developing A356/Al2O3(np) nano-composite with a novel and cost effective method for attaining homogeneous dispersion of Al2O3 nanoparticles in the Al matrix. In the current research, Al micro powders distributed on aluminum foil and then Al2O3 nanoparticles ultra-sounded in ethanol and sprayed on Al substrate. Subsequently, the sandwich foil was added to molten A356 du...

Casimir energy of a dilute homogeneous dielectric ball at zero temperature is calculated for arbitrary physically possible frequency dispersion of dielectric permittivity ε(iω). There are no divergences in calculations because in the realistic model of dilute ball atoms interact at distances greater than average interatomic distance λ, so λ is a natural physical cut-off. It is proved that Casim...

In dilute turbulent particle-laden flows, such as atmospheric dispersion of pollutants or virus particles, the dynamics tracer-like to low inertial particles are significantly altered by fluctuating motion carrier fluid phase. Neglecting effects velocity fluctuations on particle causes poor prediction transport and dispersion. To account for phase transport, stochastic differential equations co...

Preparation of composite powders with uniform dispersion, high sphericity, suitable particle size and distribution is a great concern in fabricating high-performance components via additive manufacturing. Herein, we developed novel technology, namely freeze-dry pulsated orifice ejection method（FD-POEM）, to prepare monodispersed spherical particles. Taking ZrO 2 nano-powders as an example, high-...

We define the double ramification hierarchy associated to an F-cohomological field theory and use this construction prove that principal of any semisimple (homogeneous) flat F-manifold possesses a integrable dispersive deformation at all orders in dispersion parameter. The proof is based on reconstruction F-CohFT starting from additional data genus $1$, obtained our previous work. Our these def...