کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5149016 1497872 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Novel quantum dot and nano-sheet TiO2 (B) composite for enhanced photocatalytic H2 - Production without Co-Catalyst
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Novel quantum dot and nano-sheet TiO2 (B) composite for enhanced photocatalytic H2 - Production without Co-Catalyst
چکیده انگلیسی
Recently, the production of hydrogen through water splitting using titania (TiO2) as photocatalyst has received great attention in the new energy field. In this work, a single one-step hydrothermal method is used to synthesize ultra-thin TiO2 (B) nano-sheets, anatase TiO2, and their composite, using ethylene glycol (EG) and ethanol as the solvent. A new composite nanostructure with anatase TiO2 quantum dots grown on TiO2 (B) nano-sheets is obtained at certain ratios between EG and ethanol. Even without the help of co-catalyst, a high photocatalytic efficiency, about 45 times of that of rutile-anatase mixed Degussa P25, is observed in the TiO2 (B)-anatase composite nanostructure. The outstanding performance can be attributed to its large specific surface area, abundant surface active sites, mixed phase promoted efficient charge separation. Moreover, the properly aligned band structure, with the conduction band level of ultra-thin TiO2 (B) about 0.6 eV higher than that of the anatase, provides a large driving force for the reduction of water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 360, 31 August 2017, Pages 353-359
نویسندگان
, , , , , , , , , ,