Titanium-doped γ-Fe2O3:: Reduction and oxidation properties

被引：13

作者：

Ayub, I

Berry, FJ

Crabb, E

Helgason, Ö

机构：

[1] Open Univ, Dept Chem, Milton Keynes MK7 6AA, Bucks, England

[2] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland

来源：

JOURNAL OF MATERIALS SCIENCE | 2004年 / 39卷 / 23期

关键词：

D O I：

10.1023/B:JMSC.0000047533.94176.4a

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Titanium-doped gamma-Fe2O3 has been prepared by the calcination of a solid formed by the addition of aqueous ammonia to an aqueous solution of titanium- and iron-containing salts and boiling the precipitate under reflux. As compared to pure gamma-Fe2O3 made by similar methods, titanium-doped gamma-Fe2O3 showed a higher surface area and a greater stability to reduction, thermal conversion to an alpha-Fe2O3-related structure and the maintenance of a higher surface area during oxidation-reduction cycling. (C) 2004 Kluwer Academic Publishers.

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页码：6921 / 6927

页数：7

相关论文

共 17 条

[1] Synthesis and characterisation of tin-doped iron oxides [J].

Berry, FJ ;

Greaves, C ;

Helgason, O ;

McManus, J .

JOURNAL OF MATERIALS CHEMISTRY, 1999, 9 (01) :223-226

[2] The structural characterization of tin- and titanium-doped alpha-Fe2O3 prepared by hydrothermal synthesis [J].

Berry, FJ ;

Greaves, C ;

McManus, JG ;

Mortimer, M ;

Oates, G .

JOURNAL OF SOLID STATE CHEMISTRY, 1997, 130 (02) :272-276

[3]

BERRY FJ, 1996, P INT C APPL MOSSB E, P59

[4]

BERRY FJ, 1978, ADV INORG CHEM, V21, P255

[5] Influence of nonstoichiometry and the presence of maghemite on the Mossbauer spectrum of magnetite [J].

daCosta, GM ;

DeGrave, E ;

deBakker, PMA ;

Vandenberghe, RE .

CLAYS AND CLAY MINERALS, 1995, 43 (06) :656-668

[6]

FISHER JM, 1998, Patent No. PCTGB9800325

[7] Control of grain size and morphologies of nanograined ferrites by adaptation of the synthesis route:: mechanosynthesis and soft chemistry [J].

Guigue-Millot, N ;

Bégin-Colin, S ;

Champion, Y ;

Hytch, MJ ;

Le Caër, G ;

Perriat, P .

JOURNAL OF SOLID STATE CHEMISTRY, 2003, 170 (01) :30-38

[8] HIGH-TEMPERATURE MOSSBAUER-SPECTROSCOPY OF TITANOMAGNETITE AND MAGHEMITE IN BASALTS [J].

HELGASON, O ;

GUNNLAUGSSON, HP ;

JONSSON, K ;

STEINTHORSSON, S .

HYPERFINE INTERACTIONS, 1994, 91 (1-4) :595-599

[9] Tin- and titanium-doped γ-Fe2O3 (maghemite) [J].

Helgason, Ö ;

Greneche, JM ;

Berry, FJ ;

Morup, S ;

Mosselmans, F .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2001, 13 (48) :10785-10797

[10]

Herrero E, 1997, SOLID STATE IONICS, V101, P213