Bis-(N-methylbenzyldithiocarbamato)iron(II) complex was thermolyzed at 120, 180 and 240 °C to investigate the effects of temperature on the structural and optical properties of the as-prepared iron sulfide nanocrystals. Powder X-ray diffraction studies revealed a pyrrhotite-4M (Fe₇S₈) crystalline phase for iron sulfide nanocrystals (FeS1) obtained at 120 °C and pyrrhotite-6C (Fe₁₁S₁₂) phases for iron sulfide nanocrystals (FeS2 and FeS3) obtained at 180 and 240 °C. HRTEM images confirmed the crystallite sizes of the iron sulfide nanoparticles are in the range 2.04–4.77 for FeS1 obtained at 120 °C, 4.82–11.12 for FeS2 obtained at 180 °C and 6.50–12.39 nm for FeS3 iron sulfide nanocrystals obtained at 240 °C. These results confirmed that increase in temperature resulted in the formation of iron sulfide nanocrystals with larger diameter. The optical band gaps (E_g) of the iron sulfide nanocrystals are in the range 3.70–3.76 eV. The iron sulfide nanocrystals were incorporated into hydroxyethyl cellulose (HEC) matrix to prepare iron sulfide/HEC nanocomposites.

中文翻译：

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温度对双（N-甲基苄基二硫代氨基甲酸）铁（II）配合物热分解制备的硫化铁纳米晶体的影响

将双（N-甲基苄基二硫代氨基甲酸酯）铁（II）配合物在120、180和240°C加热，以研究温度对制备的硫化铁纳米晶体的结构和光学性质的影响。粉末X射线衍射研究显示一磁黄铁矿-4M（FE ₇小号₈为硫化铁纳米晶体（FES）结晶相1在120℃下得到的）和磁黄铁矿-6C（FE ₁₁ š ₁₂），用于硫化铁纳米晶相（FES 2和FeS 3）分别在180和240°C下获得。HRTEM图像证实了FeS 1的硫化铁纳米颗粒的微晶尺寸在2.04–4.77范围内在120°C下获得的FeS 2的4.82–11.12和在180°C下获得的FeS 3硫化铁纳米晶体的6.50–12.39 nm在240°C下得到的。这些结果证实，温度升高导致形成具有较大直径的硫化铁纳米晶体。硫化铁纳米晶体的光学带隙（E _g）在3.70–3.76 eV的范围内。将硫化铁纳米晶体掺入羟乙基纤维素（HEC）基质中以制备硫化铁/ HEC纳米复合材料。