کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1789954 | 1524400 | 2015 | 7 صفحه PDF | دانلود رایگان |

• 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.
Journal: Journal of Crystal Growth - Volume 429, 1 November 2015, Pages 49–55