Hydrolytic degradation of methoxychlor by immobilized cellulase on LDHs@FeO nanocomposites.

In this study, we synthesized FeO using the co-precipitation method and then prepared magnetic carrier LDHs@FeO by immobilizing layered double hydroxide on FeO by in situ growth method. Cellulase was immobilized on this magnetic carrier by using glutaraldehyde as a coupling agent, which can be used for degrading Methoxychlor (MXC). The results demonstrated the maximum MXC removal efficiency of 73.

Structural Properties and Thermoelectric Performance of the Double-Filled Skutterudite (Sm,Gd)(FeNi)Sb.

The structural and thermoelectric properties of the filled skutterudite (Sm,Gd)(FeNi)Sb were investigated and critically compared to the ones in the Sm-containing system with the aim of unravelling the effect of double filling on filling fraction and thermal conductivity. Several samples ( = 0.50-0.

Influence of Composition and Thermal Treatments on Microhardness of the Filled Skutterudite Sm(y) (Fe(x) Ni(1−x)₄Sb₁₂.

Samples belonging to the series Sm(y)(Fe(x)Ni(1−x)₄Sb₁₂ were heated in Ar atmosphere up to 400 °C and cooled down to room temperature several times, with the aim to evaluate the effect of thermal cycles on microhardness. The treatment temperature was chosen in correspondence of the maximum ZT value, in order to simulate the operating conditions of the material in a thermoelectric device. Vickers measurements allowed to detect the effect of both composition and thermal treatments on the microhardness properties of the material.

Correlations between Structural and Electronic Properties in the Filled Skutterudite Smy(FexNi1-x)4Sb12.

A structural study of the filled skutterudite Smy(FexNi1-x)4Sb12 was performed by means of X-ray powder diffraction and μ-Raman spectroscopy with the aim to unveil the correlations between structural and electronic properties of this material and to favor the improvement of its thermoelectric performance. Samples were prepared by direct reaction of the elements at 1223 K, followed by quenching and subsequent sintering at 873 K; microstructure and composition of the obtained products were determined by SEM-EDS. The position of the boundary separating regions that obey hole- and electron-based conduction mechanisms was found by X-ray diffraction at x ≈ 0.