Titanium dioxide inverse opals and preparation method thereof

• Main Authors: WANG LIKUI, QI JIAPENG, DENG LIDUO, YAO BOLONG
• Format: Patent
• Language: English
• Published: 06.05.2015
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; CHEMISTRY; CRYSTAL GROWTH; METALLURGY; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

The invention provides a method for preparing titanium dioxide inverse opals. The method comprises the following steps: mixing dihydroxybis(ammonium lactato)titanium(IV), ethanol and hydrochloric acid to prepare a titanium dioxide precursor solution; adding an appropriate amount of the titanium dioxide precursor solution into a colloidal microsphere emulsion; dropwise adding the emulsion to the surface of a substrate which is placed horizontally and is subjected to hydrophilic treatment, and spreading the emulsion to cover the whole surface of the substrate; performing microsphere self-assembly to form colloidal crystals along with the volatilization of a solvent, and meanwhile, drying and curing the titanium dioxide precursor solution to form titanium dioxide filled among microspheres so as to form colloidal crystals filled with titanium dioxide; and finally, removing the microspheres to obtain the titanium dioxide inverse opals.