Inorganic –organic hybrid wood in response to visible light

AbstractThe inorganic –organic hybrid photoresponsive wood was fabricated by incorporating the phosphomolybdic acid (PMA)/polyvinylpyrrolidone (PVP) composites into the multi-scale hierarchical structure of wood using a simple pressure impregnation method. The as-prepared PMA-/PVP-coated wood (PPW) can change their co lors in response to visible light. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy demonstrated that the PMA/PVP composites were coated on the wood surfaces successfully and the wood structures were still clearly visible. The atomic force microscopy images confirmed tha t the surface topography of the samples was changed after visible light irradiation, which was ascribed to the formation of heteropoly blues. The analysis of the color parameters proved that as-prepared PPW possessed the excellent photoresponsive property. The ultraviolet–visible spectra (UV–Vi s) and X-ray photoelectron spectroscopy were conducted in order to explore the photoresponsive mechanism, which confirmed the photoreduction reaction occurred, producing the heteropoly blues during the process of visible light irradiation.

Source: European Journal of Applied Physiology - December 11, 2017 Category: Physiology Source Type: research