Synthesis and characterization of Al-, Bi-, and Fe-incorporated mesoporous titanosilicate (MPTS) materials and their hydrophilic properties
作者： Misook Kang , Mi-Hae Lee
DOI: 10.1016/J.APCATA.2005.01.039
关键词: Heterogeneous catalysis 、 Binding energy 、 Desorption 、 X-ray photoelectron spectroscopy 、 Chemistry 、 Photocatalysis 、 Analytical chemistry 、 Contact angle 、 Mineralogy 、 Mesoporous material 、 Activation energy
摘要: Abstract Mesoporous titanosilicates (MPTS) including Al, Bi, and Fe ions of three positive oxidation states (Metal3+) were prepared using a common hydrothermal method. The XRD result indicated that these metals (10.0 wt.% per titania amount) are stably incorporated in titanosilicate framework. mesopore sizes distributed the range 1.0–6.0 nm TEM images, surface areas obtained above 300 m2/g all metal-incorporated MPTSs. dehydrated amount decreased order Al- > Bi- > Fe- > non-metal MPTS, activation energy needed for H2O desorption from photocatalyst Al- > Fe- > Bi- > non-metal MPTS. XPS showed special peak Ti2p metal-MPTSs shifted to stronger binding than non-metal O1s (Ti–O, Ti–OH) peaks also those In particular, shift larger second (Ti–OH) was remarkable Al-MPTS. H2-TPR, Ti3+ could be more easily transferred into Ti0, which affected photoreaction, over Al- Fe-MPTSs compared with photoluminescence intensity contribution emitted electron order: non-metal, Al-, Fe-, finally Bi-MPTSs. Consequently, findings indicate super-hydrophilicity Al-MPTS best, contact angle water droplets below 3° under 120 min UV-radiation.
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