引用本文:
金华峰, 李文戈, 向纪明, 唐吉玉. Fe3+/TiO2/SiO2复合纳米微粒的合成及光催化降解NO2-[J]. 应用化学,
2001, 18(8): 636-639.
Citation: JIN Hua-Feng, LI Wen-Ge, XIANG Ji-Ming, TANG Ji-Yu. Nanometer Particles of Fe3+/TiO2/SiO2 Complex: Synthesis and Usefulness in Photocatalytic Degradation of Nitrite[J]. Chinese Journal of Applied Chemistry, 2001, 18(8): 636-639.
Citation: JIN Hua-Feng, LI Wen-Ge, XIANG Ji-Ming, TANG Ji-Yu. Nanometer Particles of Fe3+/TiO2/SiO2 Complex: Synthesis and Usefulness in Photocatalytic Degradation of Nitrite[J]. Chinese Journal of Applied Chemistry, 2001, 18(8): 636-639.
Fe3+/TiO2/SiO2复合纳米微粒的合成及光催化降解NO2-
摘要:
采用溶胶-凝胶法制备了TiO2/SiO2和不同浓度Fe3+掺杂的Fe3+/TiO2/SiO2复合纳米粉末,并利用XRD、BET、UV-vis等手段研究了TiO2/SiO2及掺铁形成的Fe3+/TiO2/SiO2复合微粒的表面结构形态变化,以及对污染物NO2-光催化降解的影响.结果表明,Fe3+/TiO2/SiO2(k(Fe3+)=1.5%,m(Ti):m(Si)=2:1)具有最佳活性,样品呈晶化度较低的锐钛矿结构.Fe3+掺杂导致晶粒的增大,稳定性降低,大大提高了半导体的光催化活性,有利于对低浓度NO2-的光催化降解.
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关键词:
- Fe3+/TiO2/SiO2
- / TiO2/SiO2
- / 复合微粒
- / 光降解
- / NO2-
English
Nanometer Particles of Fe3+/TiO2/SiO2 Complex: Synthesis and Usefulness in Photocatalytic Degradation of Nitrite
Abstract:
Fe3+/TiO2/SiO2 complex particles with doped Fe3+ were prepared by the sol-gel method. XRD, BET, UV-vis techniques were used for their characterization and studying the influences on the heterogeneous photocatalytic degradation of nitrite. The UV light photocatalytic activity of the complex particles were found higher than those of TiO2/SiO2.The mose active catalyst was Fe3+ /TiO2/SiO2,k(Fe3+)=1.5%,m(Ti):m(Si)=2:1. It is a low crystlline anatase. The doped Fe3+ increased the particle size of titanium oxide semiconductor and lowers its stability, enhancing the light photocatalytic activity for NO2- degradation.
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Key words:
- Fe3+/TiO2/SiO2
- / TiO2/SiO2
- / complex particle
- / photocatalytic degradation
- / NO2-
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