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Synthesis of mesoporous zeolite Ni-MFI with high nickel contents by using the ionic complex [(C4H9)4N]+2[Ni(EDTA)]2− as a template

2009; Elsevier BV; Volume: 332; Issue: 2 Linguagem: Inglês

10.1016/j.jcis.2009.01.006

1095-7103

Li Xiao, Baoshan Li, Huihui Mao, Asma Tufail Shah,

Zeolite Catalysis and Synthesis

Ni-MFI zeolites with high percentage of Ni (5-15 wt%) were prepared by using an ionic complex [(C(4)H(9))(4)N](2)(+)[Ni(EDTA)](2-) by one step synthesis. These molecular sieves were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), Fourier-transform infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy (UV-vis), differential scanning calorimeter (DSC) and nitrogen adsorption-desorption isotherms. The results showed that heteroatom Ni was successfully introduced into the MFI framework up to 15 wt%. Moreover, this Ni-MFI possessed regular and stable structure with high specific surface area and average pore diameter of 388-439 m(2) g(-1) and 2.566-3.828 nm, respectively, compared to MFI prepared by traditional methods. These samples also showed good thermal and hydrothermal stability.