Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran; Young Researchers and Elites Club, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran.
J Photochem Photobiol B. 2017 May;170:304-308. doi: 10.1016/j.jphotobiol.2017.04.024. Epub 2017 Apr 21.
In this study, wet chemical method used for ZnSe quantum dots (QDs) and characterized by, UV-vis, photoluminescence spectroscopy, X-ray diffraction and transmission electron microscopy. The crystallites size of ZnSe QDs was 4.0nm. The average diameters of ZnSe QDs were 3.0-5.3nm. Ritalin was degraded using the UV/ZnSe QDs/persulfate process. The several parameters investigated for the influence of Rtialin degradation were the temperature, the persulfate concentration, and the initial Ritalin concentration. The values of optimum parameters ware room temperature, concentration persulfate 5mmol/L and initial Ritalin concentration 0.09mmol/L. Comparative analyses showed the maximum degradation of Ritalin was found for ZnSe/persulfate under ultra-visible and ultra-sonic irradiation process. Comparative analysis showed the maximum degradation of Ritalin was found for ZnSe/persulfate under ultra-visible and ultra-sonic irradiation process. The values of first-order rate constants from degradation of Ritalin at 25°C were 0.96×10, 1.09×10, 1.59×10 and 2.19×10 for US/PS, UV/PS, ZnSe/US/PS and ZnSe/UV/PS system, respectively. The antibacterial activity evaluation against two bacterials, including Gram-positive bacteria Staphylococcus aureus (ATCC 43300), Bacillus megaterium (ATCC 14581) and Gram-negative bacteria Pseudomonas aeruginosa (ATCC 27853), Micrococcus luteus (ATCC 4698) was considered. It was found that the MIC values for the antibacterial assay in the presence of ZnSe QDs were around 0.30mM with 64.0, 66.0, 79.2, and 83.5% inhibition for the S. aureus, B. megaterium, P. aeruginosa and M. luteus bacterial strains, respectively. Then, results show that the ZnSe QDs have antibacterial activity.
在这项研究中，使用湿化学法制备了 ZnSe 量子点（QDs），并通过紫外-可见分光光度法、光致发光光谱法、X 射线衍射和透射电子显微镜进行了表征。ZnSe QDs 的晶粒度为 4.0nm。ZnSe QDs 的平均粒径为 3.0-5.3nm。利他林采用 UV/ZnSe QDs/过硫酸盐法降解。考察了影响利他林降解的几个参数，包括温度、过硫酸盐浓度和利他林初始浓度。最佳参数值为室温、过硫酸盐浓度 5mmol/L 和利他林初始浓度 0.09mmol/L。比较分析表明，在紫外可见和超声辐照过程中，ZnSe/过硫酸盐对利他林的降解效果最佳。比较分析表明，在紫外可见和超声辐照过程中，ZnSe/过硫酸盐对利他林的降解效果最佳。在 25°C 下，利他林降解的一级速率常数分别为 0.96×10、1.09×10、1.59×10 和 2.19×10，分别为 US/PS、UV/PS、ZnSe/US/PS 和 ZnSe/UV/PS 体系。还评价了 ZnSe QDs 对两种细菌（革兰氏阳性菌金黄色葡萄球菌（ATCC 43300）、巨大芽孢杆菌（ATCC 14581）和革兰氏阴性菌铜绿假单胞菌（ATCC 27853）、微球菌（ATCC 4698）的抗菌活性。发现 ZnSe QDs 存在时，抗菌试验的 MIC 值约为 0.30mM，对金黄色葡萄球菌、巨大芽孢杆菌、铜绿假单胞菌和微球菌的抑制率分别为 64.0%、66.0%、79.2%和 83.5%。结果表明，ZnSe QDs 具有抗菌活性。
