Factors in the precipitation medium governing morphology and structure of haematite particles in forced hydrolysis reaction

被引：17

作者：

Kandori, K ^{[1
]}

Nakamoto, Y ^{[1
]}

Yasukawa, A ^{[1
]}

Ishikawa, T ^{[1
]}

机构：

[1] Osaka Univ Educ, Sch Chem, Kashiwara, Osaka 5828582, Japan

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1998年 / 202卷 / 02期

关键词：

haematite particles; morphology; texture; forced hydrolysis reaction; water-dioxane mixed solutions;

D O I：

10.1006/jcis.1998.5468

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：

The effects of dioxane (DX) on morphology and texture of haematite particles produced from a forced hydrolysis reaction of FeCl3-HCl solution were investigated by TEM, XRD, XFS, FTIR, TG-DTA, N(2 )and H2O adsorption, and zeta potential measurements. The spherical shape of haematite particles produced below the DX concentration of 10 vol% (diameters: 600-1000 nm) was changed to cubic for particles produced at more than 12 vol% DX (mean edge lengths: 900-1200 nm). The rod-like beta-FeOOH particles were precipitated as cubic particles at the DX concentration greater than or equal to 28 vol%. TEM and XRD suggested that the haematite particles formed in the presence of DX are polycrystalline with an enlarged c dimension in a unit cell. TG and FTIR indicated that the haematite particles produced with DX are hydrohaematite possessing OH- ions in the lattice. The results obtained in the present study revealed that variation of the polarity of the medium with addition of DX is a determining factor of the particle size and shape rather than the interfacial tension of the medium and the particles. (C) 1998 Academic Press.

引用

页码：499 / 506

页数：8

共 24 条

[21]

SCHWERTMANN U, 1991, IRON OXIDES LAB, P10

[22] REPORTING PHYSISORPTION DATA FOR GAS SOLID SYSTEMS WITH SPECIAL REFERENCE TO THE DETERMINATION OF SURFACE-AREA AND POROSITY (RECOMMENDATIONS 1984) [J].

SING, KSW ;

EVERETT, DH ;

HAUL, RAW ;

MOSCOU, L ;

PIEROTTI, RA ;

ROUQUEROL, J ;

SIEMIENIEWSKA, T .

PURE AND APPLIED CHEMISTRY, 1985, 57 (04) :603-619

[23] FORMATION MECHANISM OF MONODISPERSE PSEUDOCUBIC ALPHA-FE2O3 PARTICLES FROM CONDENSED FERRIC HYDROXIDE GEL [J].

SUGIMOTO, T ;

SAKATA, K ;

MURAMATSU, A .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1993, 159 (02) :372-382

[24] NONSTOICHIOMETRIC STRUCTURES DURING DEHYDROXYLATION OF GOETHITE [J].

WOLSKA, E ;

SCHWERTMANN, U .

ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 1989, 189 (3-4) :223-237

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