Using CdSe/CdS/ZnS core/multi-shell QDs to photodegradation of methylene blue, methylene orange, and rhodamine b dyes from water
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عنوان دوره: اولین همایش ملی توسعه فناوری نانو در علوم پایه و مهندسی
کد مقاله : 1005-DNBSE
نویسندگان
کرمان-رفسنجان-دانشگاه ولی عصر (عج)
چکیده
In this paper, CdSe/CdS/ZnS core/multi-shell quantum dots (QDs) synthesized by simple and ultrafast microwave synthesis method. XRD result confirmed successful formation of CdSe/CdS/ZnS core/multi-shell structure and synthesized QDs had zinc blend structure. Photocatalyst performance of CdSe/CdS/ZnS QDs was investigated by methylene blue, methylene orange and rhodamine b as pollutants under both sun and UV illuminations. The obtained results showed that the best photodegradation among all samples belonged to the CdSe/CdS/ZnS QDs with MB under UV irradiation and its dye degradation percentage and the linear kinetic rate constant (k) were obtained about 88.9% and 24.9×10-3 respectively. Several radical scavengers were used to discover the main reactive species in the degradation process of CdSe/CdS/ZnS QDs with methylene blue under UV irradiation and results showed that the electrons play the key role in the degradation process.
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