TiO2 homogeneous out-phase junction nano material as well as preparation method and application thereof

Abstract

The invention discloses a TiO2 homogeneous out-phase junction nanometer material and a preparation method and application thereof.The preparation method comprises the steps that S1, titanium tetraisopropoxide and a concentrated hydrochloric acid solution are placed in a sealed container, shielding gas is introduced, stirring is conducted, and all the materials are evenly mixed; s2, transferring the mixture into a hydrothermal kettle for hydrothermal reaction, and cooling after the reaction is finished; s3, washing the obtained product with a NaOH solution, ethanol and deionized water respectively to obtain a white solid precipitate; s4, the white precipitate is subjected to vacuum drying and then ground, the white precipitate is placed in a muffle furnace to be subjected to an annealing reaction, the product is naturally cooled to the room temperature after the reaction is finished, and the TiO2 homogeneous out-phase junction nano material is obtained and contains a zero-dimensional-one-dimensional symbiotic structure in which zero-dimensional particles and one-dimensional prismatic rods coexist, the zero-dimensional particles are in an anatase phase, and the one-dimensional prismatic rods are in a rutile phase. The TiO2 homogeneous out-phase junction prepared by the method disclosed by the invention has excellent photocatalytic performance and shows a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic nanomaterials, in particular to a TiO 2 Heterojunction nanomaterials and their preparation methods and their application in photocatalytic water splitting for hydrogen production. Background technique [0002] Hydrogen is a future energy source and is expected to play a huge role in realizing the national energy strategy of "carbon neutrality" and "carbon peaking" and solving the energy crisis and environmental pollution caused by the consumption of fossil energy. Among the many hydrogen production methods, the use of solar photocatalytic water splitting to produce hydrogen technology is the cleanest and most environmentally friendly way to produce hydrogen and utilize renewable energy. Since the technology was first reported by two Japanese scientists in 1972, after half a century of development, great progress has been made in photocatalytic water splitting for hydrogen production. Howe...

AI Technical Summary

Problems solved by technology

However, the synthesis method of P25 is mostly TiCl 4 Hydrogen flames burn, and volatile corrosive gases are produced during the production process, which is very dangerous

However, the reported TiO 2 The synthesis methods of other types of homojunctions are mostly particle-phase composite structures, and most of the synthesis methods are two-step methods. Defects are easy to form at the interface, hindering charge transport, and the process is complicated, which cannot meet commercial needs.

Images