In this work, we report that RhB and NO could be effectively removed under visible light with hollow In(OH)xSy nanocubes fabricated at a low temperature of 80 °C. The photocatalytic experiments revealed that these low temperature synthesized hollow In(OH)xSy nanocubes were more efficient than P25 and In(OH)xSy counterpart hydrothermally synthesized at 180 °C (In(OH)xSy-180). The porous structures, larger surface area, and new valence band of low temperature synthesized hollow In(OH)xSy nanocubes were thought to account for their superior photocatalytic activity. Among all the In(OH)xSy samples, the one with original S/In ratio of 0.500 in synthetic solution exhibited the highest photocatalytic removal efficiencies of RhB, while the other with original S/In ratio of 1.000 removed NO most efficiently. We systematically studied the photocatalytic process of RhB on In(OH)xSy and analyzed their different photocatalytic performances on removing RhB and NO. This study reveals that these hollow In(OH)xSy nanocubes are promising for environmental remediation.
Dendritic nanocrystals of copper selenide were fabricated in situ for the first time by using alcohol as the solvent. Cu 2Àx Se films composed of hierarchically ordered dendritic nanostructures were prepared on Cu substrates at a rather moderate temperature of 190-200 C for just 1-3 h, while bunchy CuSe nanostructures could be further constructed above the Cu 2Àx Se dendrites by prolonging the reaction time of solvothermal growth with ethanol as the solvent. The resulting Cu 2Àx Se nanodendrites display highly symmetric corolitic morphology while the bunchy CuSe aggregations show particular nanostructures with a pronounced trunk and actinomorphic multi-branches. It is also found that the dendritic structures of crystalline Cu 2Àx Se could never be obtained when the reaction temperature is less than 190 C, while the temperature needed is 160 C for Ag 2 Se nanodendrites and higher than 220 C for CdSe nanodendrites. These copper selenide nanostructures with hierarchically ordered 3-dimensional (3D) framework exhibited good absorbance and photoluminescence (PL) property and could bear potential applications in solar cell devices in the future.
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