Department of Chemistry, Vivekananda Collage, Thakurpukur, Kolkata 700 063, West Bengal, India.
J Colloid Interface Sci. 2013 Mar 1;393:286-90. doi: 10.1016/j.jcis.2012.10.049. Epub 2012 Nov 15.
Thin films of nanocrystalline and porous FeS(2) with marcasite phase have been deposited from a greenish-blue iron nitroprusside precursor film, which readily gives FeS(2) on reacting with an aqueous solution of sodium sulfide. High resolution X-ray diffraction (HRXRD) pattern indicated the formation of polycrystalline and orthorhombic (marcasite) phase of FeS(2), whereas the field emission scanning electron microscopy (FESEM) showed the morphology of the films to be consisted of grains of average 25 nm diameter with unevenly distributed numerous pores. Optical characterization (UV-Vis and photoluminescence) revealed significant amount of blueshift in the band gap energy of the deposited material, which is attributed to the strong quantum confinement effect exerted by the FeS(2) nanocrystals. The deposited FeS(2) films showed good photocatalytic activity toward the degradation of Rose Bengal dye and could be found efficient for wastewater treatment.
从一种蓝绿色的铁亚硝酰基普鲁士前体膜中沉积出具有硫铁矿相的纳米晶和多孔 FeS(2)薄膜，该前体膜与硫化钠水溶液反应后很容易生成 FeS(2)。高分辨率 X 射线衍射 (HRXRD) 图谱表明形成了多晶和正交（硫铁矿）相的 FeS(2)，而场发射扫描电子显微镜 (FESEM) 显示薄膜的形态由平均直径为 25nm 的颗粒组成，这些颗粒不均匀地分布着大量的孔。光学特性（UV-Vis 和光致发光）表明，沉积材料的带隙能量发生了显著的蓝移，这归因于 FeS(2)纳米晶体施加的强量子限制效应。沉积的 FeS(2)薄膜对玫瑰红染料的光催化降解表现出良好的活性，并且对于废水处理非常有效。
