FeS_2纳米线的制备及硫化参数对其的影响

Synthesis of FeS_2 Nanowires and Effect of Sulfidation Parameters on the Formation

采用阳极氧化铝模板(AAO)技术与硫化工艺结合制备了FeS2纳米线阵列.硫化后得到的FeS2纳米线保持了硫化前Fe纳米线的有序阵列.在硫化过程中,FeS2结晶温度较高, 并且结晶完毕后,硫化时间对其影响较小.对样品进行表面分析表明,硫元素在表面除以FeS2 存在外,仍有一部分以多聚体或单质形式吸附在纳米线上.

FeS2 nanowires array was prepared by the combination of anodic alumina menbrane technique and sulfidation procedure. Scanning electron microscope （SEM） observation shows the bundles of oriented nanowires with very high aspect ratio before and after sulfidation. The X-ray diffraction （XRD） patterns reveal that the nanowires crystallize well with the cubic pyrite phase at higher temperatures, and sulfidation time has a little influence on the grain size during crystallization. X-ray photoelectron spectroscope （XPS） spectra show that a sulphur surface component is found additionally to the known pyrite signals.