Structural, textural and photocatalytic properties of quantum-sized In{sub 2}S{sub 3}-sensitized Ti-MCM-41 prepared by ion-exchange and sulfidation methods
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, ShaanXi 710049 (China)
In{sub 2}S{sub 3} nanocrystallites were successfully encapsulated into the mesopores of Ti-MCM-41 by a two-step method involving ion-exchange and sulfidation. The X-ray diffraction (XRD) patterns, UV-vis absorption spectra (UV-Vis), high-resolution transmission electron microscopy (HRTEM) and N{sub 2} adsorption-desorption isotherms were used to characterize the structure of the composite materials. It is found that the diameter of most In{sub 2}S{sub 3} nanocrystallites is about 2.5nm, less than the pore size of Ti-MCM-41. The In{sub 2}S{sub 3} nanocrystallites inside the Ti-MCM-41 host show a significant blue-shift in the UV-vis absorption spectra. Under irradiation of visible light ({lambda}>430nm), the composite material has much higher photocatalytic activity for hydrogen evolution than bulk In{sub 2}S{sub 3}. It can be explained by the effective charge-separation in the quantum-sized In{sub 2}S{sub 3}-sensitized Ti-MCM-41.
- OSTI ID:
- 20905418
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 8; Other Information: DOI: 10.1016/j.jssc.2006.05.010; PII: S0022-4596(06)00290-8; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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