کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
74056 49079 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly accessible SnO2 nanoparticle embedded SBA-15 mesoporous silica as a superior photocatalyst
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Highly accessible SnO2 nanoparticle embedded SBA-15 mesoporous silica as a superior photocatalyst
چکیده انگلیسی

We address the accessibility of tin oxide (SnO2) nanoparticles synthesized inside the pores of mesoporous silica (SBA-15) host. On using a low-temperature route for in situ synthesis of SnO2 and hence eliminating interparticle aggregation, SnO2 nanoparticles of diameter much smaller (3.5 nm) than the cylindrical pore diameter (6.3 nm) of the SBA-15 could be synthesized. This enables molecules diffusing into the SBA-15 pores to access the very high specific surface area of SnO2; enabling the diffusing species to react easily with the latter. This is demonstrated by an enhanced photocatalytic degradation rate constant of an aqueous solution of rhodamine B dye, on contacting the latter with the SnO2-SBA-15 composite.

Figure optionsDownload as PowerPoint slideHighlights
► Surface-modified SBA-15 helps synthesize SnO2 particles smaller than pore diameter.
► 3.5 nm diameter SnO2 nanoparticle within 6.3 nm pore prevents pore blockage.
► Smaller nanoparticles show faster degradation rate of rhodamine B dye.
► This emphasizes the importance of accessibility of dye molecule to SnO2 surface.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 149, Issue 1, 1 February 2012, Pages 166–171
نویسندگان
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