CAJ | 학술논문

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 structres.However,the method using ETS-4seeds 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.