標題: Interconversion of rutile TiO2 and layered ramsdellite-like titanates: New route to elongated mesoporous rutile nanoplates
作者: Peng, Chih-Wei
Richard-Plouet, Mireille
Tsai, Min-Chiao
Lee, Chi-Young
Chiu, Hsin-Tien
Petit, Pierre-Emmanuel
Sheu, Hwo-Shuenn
Lefrant, Serge
Brohan, Luc
應用化學系
Department of Applied Chemistry
公開日期: 1-十月-2008
摘要: We report the first soft chemistry synthesis of a new "layered ramsdellite-like" titanate structure, NaTi2O4(OH) (lattice parameters: primitive monoclinic system, a = 4.09 nm, b = 0.29 nm, c = 0.94 nm, and beta = 80 degrees), with high-aspect-ratio, platelike morphology (diameter. 20-200 nm; thickness. 10-40 nm; length. 0.05-5 mu m) from TiO2 rutile. The newly prepared titanate can be transformed back to TiO2 rutile with uniquely shaped mesoporous elongated nanoplate morphology. The reaction proceeds via the disintegration of rutile in NaOH(aq) into NaTi2O4(OH). Ion exchange of Na+ in NaTi2O4(OH) into H+ forms another new layered ramsdellite-like titanate, HTi2O4(OH). A final topotatic condensation of the titanate layers in HTi2O4(OH) by heat treatment at relatively low 673 K produces the mesoporous TiO2 rutile product with highly exposed (110) surfaces.
URI: http://dx.doi.org/10.1021/cg701183a
http://hdl.handle.net/11536/8271
ISSN: 1528-7483
DOI: 10.1021/cg701183a
期刊: CRYSTAL GROWTH & DESIGN
Volume: 8
Issue: 10
起始頁: 3555
結束頁: 3559
顯示於類別:期刊論文


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