Tuning the nature of defect states in black TiO2 nanostructures
Moamen Mohamed Soliman, Nageh Allam
الجامعة الأمريكية بالقاهرة · مصر
الموضوعات
علوم تطبيقية وتكنولوجية
الملخص
Black TiO2 is being widely investigated due to its superior optical activity. Herein, the limitations of the hydrogenation process are unraveled by exploiting the fundamental tradeoffs affecting the overall efficiency of the water splitting process. Different reduction rates are applied to sub-100 nm TiO2 highly efficient short nanotubes. X-ray photoelectron spectroscopy reveals changes in the stoichiometry of TiO2 with the reduction rate. UV-Vis and Raman spectra reveal that high reduction rates promote the formation of the rutile phase in TiO2, which is inactive towards water splitting. The electrochemical analysis discloses that low reduction rates induce higher concentration of localized electronic defect states that hinder the water splitting performance. Finally, incident photon-to-current conversion efficiency (IPCE) points out to the optimum reduction rate that attains relatively lower defects concentration as well as lower rutile content, thereby achieving the highest conversion efficiency.
روابط وملفات
التعريف والنوع
- رقم الوثيقة
- 05ae0755-5636-48c9-b0eb-6106923ebbab
- رقم العقد
- 0
- نوع الوسائط
- Crawler
- نوع المحتوى
- الرسائل العلمية
- صيغة المصدر
- رسائل ماجيستير
- نوع الملف
- pdf image
- أسماء الملفات
- 05ae0755-5636-48c9-b0eb-6106923ebbab_1.pdf
بيانات النشر
- ألقاب المؤلفين
- [{"name_ar":" Moamen Mohamed Soliman","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"Nageh Allam","title_ar":"اشراف","title_en":"Supervision"}]
- اللغة
- English
المصدر والدورية
- اسم المصدر
- Tuning the nature of defect states in black TiO2 nanostructures
المحتوى والصفحات
- عدد الصفحات
- 0
إشراف وإعداد
- الإشراف
- Nageh Allam
- الإعداد
- Moamen Mohamed Soliman
الاقتباسات الببليوغرافية
APA
MLA