کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1789954 1524400 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Formation mechanism of a series of trigonal antiprismatic jarosite-type compounds
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Formation mechanism of a series of trigonal antiprismatic jarosite-type compounds
چکیده انگلیسی


• A series of jarosite-type compounds was prepared.
• The as-prepared samples exhibit a novel trigonal antiprismatic shape.
• The formation mechanism of trigonal antiprismatic jarosite-type compounds was investigated.

Trigonal antiprismatic jarosite-type compounds were prepared by a simple, rapid and template-free synthetic route. The as-prepared samples were characterized by various techniques. The results indicate that the formation of jarosite-type particle with trigonal antiprismatic morphology strongly depends on pH of the system. Trace of Fe2+ ions enter jarosite-type crystal and play a role in the development of the trigonal antiprismatic morphology. Based on the characterization data and experimental observation, the possible formation mechanism was clarified. Fe3+ ions firstly transformed to schwertmannite in the presence of SO42− ions. When Na+ (K+ or NH4+) ions coexist in the system, schwertmannite is preferable to transforming jarosite-type compounds instead of other iron oxides.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 429, 1 November 2015, Pages 49–55
نویسندگان
, , , , , , ,