A novel synthesis process of ETS-4 titanosilicate using commercial anatase in the absence of fluoride ions

Li-ying Liu 1, 2) , Wen-jun Tan 3) , Penny Xiao 2) , and Yu-chun Zhai 1) 1) School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China 2) Department of Chemical Engineering, Monash university, Wellington Road, Clayton, VIC 3800, Australia 3) Northeastern Research Academy, Northeastern University, Shenyang 110819, China

摘 要：A novel synthesis process for ETS-4 titanosilicate using commercial anatase as the titanium source in the absence of fluoride ions was studied. Fluoride ions and traced ETS-4 seeds have important roles in forming ETS-4 structures. However, the method using ETS-4 seeds instead of fluoride ions to improve product purity and productivity is environment-friendly. ETS-4, ETS-4（NS）, and ETS-4（NaF） were respectively synthesized using traced ETS-4 seeds, without seeds, and with fluoride ions. The as-synthesized samples were identified by X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis. Adsorption isotherms and adsorption heats of nitrogen and methane on the prepared ETS-4 were also measured. The results showed that ETS-4 samples could be prepared using anatase in the absence of fluoride ions, with good purity, comparable physicochemical properties, and excellent adsorption properties.

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