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中文摘要：
在表面活性剂十六烷基三甲基溴化铵（CTAB）的辅助下,以乙酸锌为锌源,硫脲（NH2）2CS为硫源,使用水热法通过改变反应时间,成功制备了不同粒径的ZnS球状颗粒。利用X射线衍射（XRD）、扫描电子显微镜（SEM）、X-射线能谱,高分辨透射电子显微镜（HRTEM））、紫外可见分光光谱和光致发光谱（PL）等测试手段对样品的晶体结构、形貌、光学性质进行了分析。通过对不同粒径的ZnS纳米颗粒对亚甲基蓝的光催化降解的催化活性进行了评估。实验结果表明：在表面活性剂CTAB的作用下,随着反应时间的增加,生成的ZnS晶核生长成纳米颗粒,然后ZnS纳米颗粒将进一步发生团聚从而形成平均粒径超过500nm的ZnS纳米球,但制备的ZnS产物的晶体结构均为立方纤锌矿结构。随着ZnS粒径的增加,样品的紫外吸收峰从418nm逐渐蓝移到362nm,而PL发射峰位的峰强随着粒径的增大而增强。光催化结果显示,反应12h制备的ZnS纳米球的光催化性能最佳。
英文摘要：
Under the role of CTAB, different size Zn S spherical-like particles were fabricated by hydrothermal method. The crystal structure, morphology, composition and optical property of the samples were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, high resolution transmission electron microscopy（HRTEM）, X-ray energy spectrum（EDS）, UV-Vis absorption spectrum and photoluminescence spectrum（PL）.Photocatalytic activities were evaluated by degradation of MB solution. The results show that Zn S nanoparticles were formed by aggregation of crystal nucleus under the role of CTAB. With the increase of reaction time, the size of Zn S particles increased to 500 nm, however, the crystal structure of product has no change. With the increase of particle size, the UV-Vis absorption peak of samples shifted from 418 to 362 nm and the PL intensity further increased. Finally, the photocatalytic activity presented that fabricated Zn S nanoparticles with reaction time 12 h showed best photcatalytic performance.
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