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Multivalency iodine (I(7)+/I(-)) doped TiO(2) were prepared via a combination of deposition-precipitation process and hydrothermal treatment. The as-prepared samples were characterized by X-ray diffraction, transmission electron microscopy, Brunauer-Emmett-Teller surface area, UV-vis diffuse reflectance spectra, X-ray photoelectron spectroscopy, surface photovoltage spectroscopy, and electric-field-induced surface photovoltage spectroscopy. The electronic structure calculations based on the density functional theory revealed that upon doping, new states that originated from the I atom of the IO(4) group are observed near the conduction-band bottom region of TiO(2), and the excitation from the valence band of TiO(2) to the surface IO(4-) is responsible for the visible-light response of the I-doped TiO(2). The as-prepared I-doped TiO(2) showed high efficiency for the photocatalytic decomposition of gaseous acetone under visible light irradiation (lambda > 420 nm). A possible mechanism for the photocatalysis on this multivalency iodine (I(7)+/I(-)) doped TiO(2) under visible light was also proposed.

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Nanocrystalline In(OH) y S z solid solutions were synthesized from In(NO 3 ) 3 and thiourea in an aqueous solution of ethylenediamine via a facile hydrothermal method. The samples were characterized by X-ray diffraction (XRD), N 2 -sorption (BET surface area), UV-vis diffuse reflectance spectra (DRS), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectra (EDS), and X-ray photoelectron spectroscopy (XPS). The position of the valence band for In(OH) y S z was established by ultraviolet photoelectron spectra (UPS). Electronic band calculations based on density functional theory (DFT) revealed that upon being doped, several doping states derived from S 3p orbitals appeared in the band gap of undoped In(OH) 3 . In(OH) y S z showed visible-light-driven photocatalytic activity in the decomposition of gaseous acetone. A possible sub-band-transition mechanism of the photocatalysis on In(OH) y S z solid solutions under visible light irradiation was also proposed in this work.

We present a theoretical prediction of the facile cycloadditions of carbene, silylene, and germylene onto the diamond (100) surface, a new type of surface reaction that can be employed to functionalize diamond surface at low temperature. This finding renders the plausibility that the diamond surface can be chemically modified by the well-known carbene addition chemistry, which might introduce new functionalities to the diamond surface for novel applications in a diversity of fields.