کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
741290 1462061 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Luminescent carbon dots assembled SBA-15 and its oxygen sensing properties
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Luminescent carbon dots assembled SBA-15 and its oxygen sensing properties
چکیده انگلیسی


• SBA-15 was prepared using P123 as template, TEOS as silicon source.
• Effect of carbon dots assembed SBA-15 was discussed.
• CDs/SBA-15 had a reversible oxygen sensing signal and a good photochemical stability.

A simple, environmentally friendly and cost-effective approach has been developed to assemble luminescence carbon dots (CDs) into the ordered channels of the mesoporous SBA-15. When analyzing the effect of gases such as nitrogen, oxygen, carbon dioxide and water vapor in the air on the luminescent properties of CDs/SBA-15 hybrid material, we found that the as-prepared samples had a reversible oxygen sensing signal and good photochemical stability. The samples had no response to carbon dioxide, or nitrogen, indicating that the material has extremely high selectivity to the oxygen over the other gases, and water vapor had almost no effect on the luminescent properties of the CDs/SBA-15 material. The response time was determined to be about 7–10 s and the emission intensities of the samples were effectively reduced as the concentration of oxygen increased. These results indicate that the system we have developed can be used for oxygen detection in wide concentration range and is especially accurate for very low oxygen concentrations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 230, July 2016, Pages 101–108
نویسندگان
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