Effect of functional groups on the crystallization of ferric oxides/oxyhydroxides in suspension environment
Effect of functional groups on the crystallization of ferric oxides/oxyhydroxides in suspension environment
Qiong ZHOU1,2, Olga ALBERT3, Hua DENG1, Xiao-Long YU1,2, Yang CAO2(), Jian-Bao LI2, Xin HUANG4()
1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China; 2. College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China; 3. ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University Mainz, D-55128 Mainz, Germany; 4. Department of Oral and Maxillofacial Surgery, Beijing Stomatological Hospital, Capital Medical University, Beijing 100050, China
This paper investigated the effects of five kinds of Au surfaces terminated with and without functional groups on the crystallization of ferric oxides/oxyhydroxides in the suspension condition. Self-assembled monolayers (SAMs) were used to create hydroxyl (--OH), carboxyl (--COOH), amine (--NH2) and methyl (--CH3) functionalized surfaces, which proved to be of the same surface density. The immersion time of substrates in the Fe(OH)3 suspension was divided into two time portions. During the first period of 2 h, few ferric oxide/oxyhydroxide was deposited except that ?-Fe2O3 was detected on--NH2 surface. Crystallization for 10 h evidenced more kinds of iron compounds on the functional surfaces. Goethite and maghemite were noticed on four functional surfaces, and maghemite also grew on Au surface. Deposition of ?-Fe2O3 was found on--OH surface, while the growth of orthorhombic and hexagon FeOOH were indicated on--NH2 surface. Considering the wide existence of iron compounds in nature, our investigation is a precedent work to the study of iron biomineralization in the suspension area.
Corresponding Author(s):
CAO Yang,Email:caowanghui@yahoo.com.cn (Y.C.); HUANG Xin,Email:huangyue874@sohu.com (X.H.)
引用本文:
. Effect of functional groups on the crystallization of ferric oxides/oxyhydroxides in suspension environment[J]. Frontiers of Materials Science, 2012, 6(4): 297-303.
Qiong ZHOU, Olga ALBERT, Hua DENG, Xiao-Long YU, Yang CAO, Jian-Bao LI, Xin HUANG. Effect of functional groups on the crystallization of ferric oxides/oxyhydroxides in suspension environment. Front Mater Sci, 2012, 6(4): 297-303.
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