Articles
  • Synthesis and characterization of novel Ti-containing mesoporous silicas support
  • Peihong Yaoa, Weiwei Hub, Yan Baob, Cuiling Zhanga, Bochao Zhua, Wenxia Liua and Yongxiao Baib,*
  • a Lanzhou Petrochemical Research Center, Petrochina, Lanzhou 730060, China b Institute of material science and engineering, Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
Abstract
Titanium-containing novel mesoporous silicas have been synthesized at ambient temperature by a sol-gel method using amines with alkyl chains of 10-16 carbon atoms as a templating surfactant. An identical synthesis procedure was followed together with the addition of different amounts of titanium (IV) source in the synthesis gels to obtain its titanium-containing silicate gels. Following this synthesis route, it was possible to prepare materials without forming extrawall TiO2. The transparent gel formed as a precursor resulted in a relatively high titanium incorporation in the silicate framework of up to 0.4% Ti. The characterization results show that most Ti4+ are isolated and tetrahedrally incorporated into the framework of the silicate gel. Raman spectra and UV-vis spectra indicated that most Ti atoms were incorporated as isolated Ti sites into the silicate framework, and materials with a higher wt% Ti using relatively more coordination agent to prevent TiO2 forming anatase.

Keywords: Silica gel, Cethyltriethylammonium bromide, Titanium sulfate, Framework, Coordination agent

This Article

  • 2011; 12(3): 289-293

    Published on Jun 30, 2011

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