Ishikawa Tatsuo, Motoki Taiki, Katoh Ryuichi, Yasukawa Akemi, Kandori Kazuhiko, Nakayama Takenori, Yuse Fumio
School of Chemistry, Osaka University of Education, 4-698-1 Asahigaoka, Kashiwara, Osaka, 582-8582, Japan.
J Colloid Interface Sci. 2002 Jun 1;250(1):74-81. doi: 10.1006/jcis.2002.8257.
beta-FeOOH particles were prepared by aging aqueous FeCl3 solutions containing Ti(IV), Cr(III), and Cu(II) at room temperature for 360 days. The structures of the formed particles were investigated by various techniques including TEM, XRD, XAFS, and adsorption of N2 and H2O. Ti(IV) markedly impeded the crystallization and particle growth of beta-FeOOH by coprecipitation with Fe(III) and disturbing the short-range structure of beta-FeOOH particles. In the presence of a large amount of Ti(IV), it was pronounced that the hydrolysis of Ti(IV) impeded beta-FeOOH formation by reducing the solution pH, whereas Cr(III) and Cu(II), which were hardly involved in the products, gave rise to no noticeable effects on the formation of beta-FeOOH particles. The knowledge obtained in this study can be available for interpretation of the anti-corroding function of Ti alloyed with steels in a Cl- -containing environment.
通过在室温下将含有Ti(IV)、Cr(III)和Cu(II)的FeCl3水溶液老化360天来制备β-FeOOH颗粒。通过包括透射电子显微镜（TEM）、X射线衍射（XRD）、X射线吸收精细结构（XAFS）以及N2和H2O吸附等各种技术对形成颗粒的结构进行了研究。Ti(IV)通过与Fe(III)共沉淀并扰乱β-FeOOH颗粒的短程结构，显著阻碍了β-FeOOH的结晶和颗粒生长。在大量Ti(IV)存在的情况下，很明显Ti(IV)的水解通过降低溶液pH值阻碍了β-FeOOH的形成，而几乎不参与产物形成的Cr(III)和Cu(II)对β-FeOOH颗粒的形成没有产生明显影响。本研究中获得的知识可用于解释在含Cl-环境中与钢合金化的Ti的抗腐蚀功能。
