期刊
JOURNAL OF NANOPARTICLE RESEARCH
卷 7, 期 6, 页码 691-705出版社
SPRINGER
DOI: 10.1007/s11051-005-7520-8
关键词
nanoparticles; photocatalysts; TiO2; magnetite; magnetic photocatalysts; preparation
A crystalline titanium dioxide coating was deposited onto silica insulated magnetite particles to prepare a stable magnetic photocatalyst. The direct deposition of crystalline titanium dioxide was conducted by aging dispersions of insulated magnetite particles in a titanium sol-gel precursor mixture at 60-90 degrees C. The coating process was found to be influenced by pH, alkoxide precursor concentration, aging time and reaction temperature. A mechanism for the formation of the titanium dioxide coating has been proposed. The photocatalytic performance of the prepared particles was found to be related to the preparation conditions.
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