Abstract: A method is provided for making a magnesium(Mg)-iron(Fe) complex oxide. The Mg—Fe complex oxide is used for separating and purifying carbon dioxide (CO2). The present invention solves the problem of using iron ore in chemical looping combustion. The present invention comprises the following steps: At first, iron ore and magnesium nitrate (Mg(NO3)2.6H2O) are impregnated for reaction. After sieving within a fixed range of size, calcination is processed to obtain the Mg—Fe complex oxide. Not only the problem of using iron ore in chemical combustion loop is effectively solved; but also the whole procedure can be looped for a long time with a high CO2 conversion rate.

Abstract: A method for fabricating an aligned graphene sheet-polymer composite is provided, which includes the steps below. A mixture is prepared with the dispersed graphene sheets in the polymer fluid. The graphene filament bundles substantially paralleled to each other are formed by a sequence of aligned graphene sheets in the polymer fluids when a field was applied. Finally, the mixture is solidified. An anisotropic index in a range of 1.00 to 2.00 is obtained in an aligned graphene sheet-polymer composite by calculating the ratio of the coefficient of thermal conductivity in a parallel direction and the one in perpendicular direction. The aligned graphene sheet-polymer composite is also provided.