Homogeneous precipitation by enzyme-catalyzed reactions. 2. Strontium and barium carbonates

被引:98
作者
Sondi, I [1 ]
Matijevic, E [1 ]
机构
[1] Clarkson Univ, Ctr Adv Mat Proc, Potsdam, NY 13699 USA
关键词
D O I
10.1021/cm020852t
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Catalytic decomposition of urea by enzyme urease in aqueous strontium and barium chloride solutions was used to rapidly precipitate witherite (BaCO3) and strontianite (SrCO3) particles at room temperature. At the early stages of the process, uniform spheroidal particles were generated, which were shown to consist of nanosized subunits. On continuous aging of the same systems the additionally precipitated alkali earth carbonates grow as whiskers onto original core particles, which eventually fully transform into crystalline rodlike clusters.
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页码:1322 / 1326
页数:5
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