High-Temperature and High-Pressure Aqueous Solution Formation, Growth, Crystal Structure, and Magnetic Properties of BiFeO3 Nanocrystals

TY - JOUR

T1 - High-Temperature and High-Pressure Aqueous Solution Formation, Growth, Crystal Structure, and Magnetic Properties of BiFeO3 Nanocrystals

AU - Mi, Jian-Li

AU - Jensen, Thomas Nørregaard

AU - Christensen, Mogens

AU - Tyrsted, Christoffer

AU - Jørgensen, Jens E.

AU - Iversen, Bo B.

PY - 2011/1/20

Y1 - 2011/1/20

N2 - In situ synchrotron radiation powder X-ray diffraction (SR-PXRD) was applied to study the formation and growth of BiFeO3 nanocrystals, revealing that phase pure BiFeO3 can be obtained in high-temperature, high-pressure aqueous solution using Bi(NO3)3 and Fe(NO3)3·9H2O as precursors and KOH as mineralizer. The method gives a rapid way for preparation of nanomaterials, and the formation of BiFeO3 can be finished within seconds after its initial nucleation in near-critical aqueous solution. As proof of concept BiFeO3 nanocrystals were subsequently synthesized in a continuous flow supercritical system and for reference also in autoclaves. High resolution multitemperature SR-PXRD data were measured between 100 and 1000 K with a step size of 100 K. The magnetic properties of both the autoclave and the continuous flow samples are studied.

AB - In situ synchrotron radiation powder X-ray diffraction (SR-PXRD) was applied to study the formation and growth of BiFeO3 nanocrystals, revealing that phase pure BiFeO3 can be obtained in high-temperature, high-pressure aqueous solution using Bi(NO3)3 and Fe(NO3)3·9H2O as precursors and KOH as mineralizer. The method gives a rapid way for preparation of nanomaterials, and the formation of BiFeO3 can be finished within seconds after its initial nucleation in near-critical aqueous solution. As proof of concept BiFeO3 nanocrystals were subsequently synthesized in a continuous flow supercritical system and for reference also in autoclaves. High resolution multitemperature SR-PXRD data were measured between 100 and 1000 K with a step size of 100 K. The magnetic properties of both the autoclave and the continuous flow samples are studied.

U2 - 10.1021/cm102575w

DO - 10.1021/cm102575w

M3 - Journal article

SN - 0897-4756

VL - 23

SP - 1158

EP - 1165

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 5

ER -