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• A novel model is presented to study thermoelastic diffusion behavior of a 1D half-space. • The RPL, G–L, L–S and classical models of thermoelasticity are mutual into a unified formulation. • The exact solution of motion, heat conduction and mass diffusion equations has been obtained. • Solutions are considered to define the thermoelastic diffusion behavior of the medium. • The validity of results is acceptable by comparing the present model with those due to other theories. This paper presents a novel multi-phase-lag model to study the thermoelastic diffusion behaviour of a one-dimensional half-space. The multi-phase-lag, the Green–Lindsay, the Lord–Shulman models as well as the classical theory of thermoelasticity are mutual into a unified formulation. The exact solution of three coupled equations, namely; motion, heat conduction and mass diffusion equations; has been obtained. Solutions determining for initial and boundary conditions are considered to define the thermoelastic diffusion behavior of the medium. The validity of results is acceptable by comparing the temperature, dilatation, displacement, stresses, concentration, and chemical potential according to the present multi-phase-lag theory with those due to other thermoelasticity theories. [ABSTRACT FROM AUTHOR]

An analysis has been carried out for the three dimensional flow of viscous nanofluid in the presence of partial slip and thermal radiation effects. The flow is induced by a permeable stretching surface. Water is treated as a base fluid and alumina as a nanoparticle. Fluid is electrically conducting in the presence of applied magnetic field. Entire different concept of nonlinear thermal radiation is utilized in the heat transfer process. Different from the previous literature, the nonlinear system for temperature distribution is solved and analyzed. Appropriate transformations reduce the nonlinear partial differential system to ordinary differential system. Convergent series solutions are computed for the velocity and temperature. Effects of different parameters on the velocity, temperature, skin friction coefficient and Nusselt number are computed and examined. It is concluded that heat transfer rate increases when temperature and radiation parameters are increased. [ABSTRACT FROM AUTHOR]

Herein, we proposed a facile method to grow hydrophilic Fe 3 O 4 NPs on non-pretreated CFs using a polyol-assisted hydrothermal method, which played a vital role in constructing CFs@Fe 3 O 4 @SiO 2 -C/Ni composites. Benefiting from high coverage of Ni NPs, the unique cloth structure, and magnetic property, they exhibited excellent performance in catalysis on 4-nitrophenol. • Hydrophobic CFs can be converted to hydrophilic magnetic CFs by a simple polyol-assisted hydrothermal method. • A silica layer can be easily coated on magnetic CFs owing to the hydrophilic property of the magnetic CFs. • CFs@Fe 3 O 4 @SiO 2 -C/Ni hybrids are easy to collect and recycle due to their unique structure and good magnetic property. Grafting functional components onto carbon fibers is important for designing many multifunctional composites. However, this process is often hindered by the low reactivity of carbon fibers. Hence, developing innovative grafting strategies with functional groups or nanomaterials on carbon fibers (CFs) is highly desired. Herein, we proposed a facile method to grow hydrophilic Fe 3 O 4 NPs on non-pretreated CFs using a polyol-assisted hydrothermal method, changing hydrophobic CFs to hydrophilic. Benefiting from the hydrophilic property of CFs@Fe 3 O 4 , the resultant CFs@Fe 3 O 4 can be successfully coated by SiO 2 layer to form CFs@Fe 3 O 4 @SiO 2 composites. After a hydrothermal reaction with nickel ions, the CFs@Fe 3 O 4 @nickel silicate composites were fabricated. Followed by coating polydopamine (PDA) layer and then carbonizing in N 2 atmosphere, CFs@Fe 3 O 4 @SiO 2 -C/Ni hybrids can be finally obtained. Notably, the hydrophilic Fe 3 O 4 NPs play a crucial role in the fabrication process, not only improving the interfacial adhesion of carbon fibers for further modification but also providing the main magnetism resource. Moreover, the density and size of Ni NPs can be tailored by tuning pyrolysis temperature. Experimental results confirm that CFs@Fe 3 O 4 @SiO 2 -C/Ni hybrids synthesized at 700 °C gave the best activity on the reduction in 4-nitrophenol, which are easy to collect and recycle due to their unique structure and good magnetic property. [ABSTRACT FROM AUTHOR]