ZnS 量子点作为高效纳米颗粒去除甲基紫的光催化活性研究：铁离子掺杂的影响。
Study of photocatalytic activity of ZnS quantum dots as efficient nanoparticles for removal of methyl violet: effect of ferric ion doping.
机构信息
Department of Chemistry, Razi University, Kermanshah, Iran.
Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Mar 25;122:260-7. doi: 10.1016/j.saa.2013.11.064. Epub 2013 Nov 21.
Zinc sulfide quantum dots (QDs), as pure and doped with Fe(3+), were prepared for photodecolorization of methyl violet (MV), as a model dye, under UV light irradiation. The syntheses of QDs were carried out using a simple chemical co-precipitation method. The prepared samples were characterized by various techniques including X-ray diffraction, transmission electron microscopy, UV-Vis spectrophotometry and flame atomic absorption spectroscopy. The influences of operational parameters on the decolorization of MV such as dopant content, pH, dosage of nanophotocatalyst, UV irradiation time and initial dye concentration were studied. The results showed that the QDs presented high efficiency for MV decolorization, and doping of ZnS QDs with Fe(3+) enhanced the efficiency and rate of dye removal. Finally, the reproducibility and kinetic model of the dye degradation were discussed.
硫化锌量子点（QDs），无论是纯的还是掺杂了 Fe(3+)，都被制备出来，用于在紫外光照射下光降解甲基紫（MV），作为一种模型染料。QDs 的合成是通过一种简单的化学共沉淀法进行的。所制备的样品通过各种技术进行了表征，包括 X 射线衍射、透射电子显微镜、紫外可见分光光度法和火焰原子吸收光谱法。研究了操作参数对 MV 脱色的影响，如掺杂剂含量、pH 值、纳米光催化剂用量、紫外光照射时间和初始染料浓度。结果表明，QDs 对 MV 的脱色具有高效性，并且 Fe(3+)掺杂 ZnS QDs 增强了染料去除的效率和速率。最后，讨论了染料降解的重现性和动力学模型。
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