Fabrication and characterization of metal-doped TiO₂ nanofibers for photocatalytic reactions

详细信息    查看全文

• 作者：Ju-Young Park^a ; Kwang-Il Choi^a ; ^b ; Jae-Hyeok Lee^c ; Cheol-Ho Hwang^d ; Do-Young Choi^c ; Jae-Wook Lee^d ; ^{jwlee@chosun.ac.kr} ; ^{jwlee65@naver.com}
• 关键词：Nanocomposite ; Phase transformation ; Electrospun ; TiO2 nanofibers ; Metal dopin1
• 刊名：Materials Letters
• 出版年：2013
• 出版时间：15 April, 2013
• 年：2013
• 卷：97
• 期：Complete
• 页码：64-66
• 全文大小：555 K

文摘

Metal (Co²⁺, Ni²⁺, Cu²⁺, and Zn²⁺) doped TiO₂ nanofibers were fabricated by a sol-gel method and an electrospinning technique using poly(methyl methacrylate) (PMMA) and titanium isopropoxide as precursors. Co, Ni, and Zn were found to promote the anatase-rutile (A-R) phase transformation, whereas Zn inhibited this process. The as-prepared catalysts were evaluated in the photodecomposition of methylene blue under UV light. Ni- and Zn-doped TiO₂ nanofibers were found to be more efficient than pure TiO₂ nanofibers in this reaction. The photocatalytic degradation rate fitted a pseudo-first-order equation. Zn-doped TiO₂ nanofibers were found to be promising materials for the photocatalytic decomposition of methylene blue with a kinetic constant of 0.0240 min^?1.