کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7833054 | 1503517 | 2018 | 44 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
One-pot fabrication of β-Bi2O3@Bi2S3 hierarchical hollow spheres with advanced sunlight photocatalytic RhB oxidation and Cr(VI) reduction activities
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Herein, we demonstrate the design and fabrication of β-Bi2O3@Bi2S3 hollow microspheres with sheet-like hierarchical nanostructures targeting an advanced visible-light-responsive photocatalytic system. In comparison with pure Bi2S3 and β-Bi2O3, the as-obtained β-Bi2O3@Bi2S3 heterojunction photocatalyst exhibits a markedly enhanced sunlight photocatalytic activity towards the photo-degradation of rhodamine B. Following, the property of the β-Bi2O3@Bi2S3 on the Cr6+ photocatalytic reduction was then evaluated. Operating conditions such as β-Bi2O3@Bi2S3 mass, tartaric acid concentration, and initial Cr6+ concentration were analyzed. The results showed that a suitable reduction condition was selected as, β-Bi2O3@Bi2S3 dosage 25â¯mg, initial concentration 20â¯mg·Lâ1 and molar ratio of Cr6+/tartaric acid 1:20. The outstanding photocatalytic performances of the hybrid photocatalyst are mainly attributed to the reduced recombination rates of photo-generated electrons/holes, enhanced light harvesting, increased active sites as well as the improved photo/chemical stability. Moreover, the photocatalytic mechanism of β-Bi2O3@Bi2S3 for oxidation of RhB and reduction of Cr6+ was investigated in detail. The enhanced photocatalytic activity and excellent chemical stability render the thus-fabricated heterostructure a promising candidate to remediate aquatic contaminants and meet the demands of future photocatalytic materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 455, 15 October 2018, Pages 8-17
Journal: Applied Surface Science - Volume 455, 15 October 2018, Pages 8-17
نویسندگان
Chongfei Yu, Pengyan Yang, Luna Tie, Siyu Yang, Shuying Dong, Jingyu Sun, Jianhui Sun,