کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5355406 | 1503578 | 2016 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Facile growth and composition-dependent photocatalytic activity of flowerlike BiOCl1âxBrx hierarchical microspheres
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
A group of nanosheet-assembled three-dimensional BiOCl1âxBrx hierarchical microspheres (x = 0, 0.3, 0.4, 0.5, 0.7, 0.8 and 1.0) with layered tetragonal crystal phase were prepared by 2-methoxyethanol-assisted solvothermal route and using ionic liquids as both halogen sources and structure-directing agent. By the combination of the results including XRD, XPS and UV-vis/DR spectra, lattice substitution of halogen atoms each other and then formation of BiOCl1âxBrx solid solution was evidenced. Additionally, the BiOCl1âxBrx microspheres exhibited interesting composition-dependent band gaps. The simulated sunlight and visible-light photocatalytic properties including degradation, mineralization and reusability of the BiOCl1âxBrx microspheres were evaluated by selecting p-nitrophenol (PNP) and tetrabromobisphenol-A (TBBPA) as the target pollutant compounds, finding that the balance between the suitable band gap and adequate potential of the valence band in BiOCl1âxBrx crystals dominated their photocatalytic activity. Additionally, the BiOCl1âxBrx microspheres with advantages such as enhanced photon utilization efficiency, larger BET surface area and favorable (110) exposed reactive surface gave the positive influence on their photocatalytic activity. Based on the results of photoelectrochemistry experiment and indirect chemical probe testing, direct
- O2â and hVB+ photooxidation for the decomposition of PNP or TBBPA was revealed.
- O2â and hVB+ photooxidation for the decomposition of PNP or TBBPA was revealed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 390, 30 December 2016, Pages 765-777
Journal: Applied Surface Science - Volume 390, 30 December 2016, Pages 765-777
نویسندگان
Qin Qin, Yingna Guo, Dandan Zhou, Yuxin Yang, Yihang Guo,