Monoatomic loaded TiO2 quantum dot photocatalyst and preparation method thereof

Abstract

The invention provides a monatomic loaded TiO2 quantum dot photocatalyst and a preparation method thereof. The metal monatomic loaded TiO2 quantum dot photocatalyst with high dispersity and large specific surface area is obtained. The preparation method is simple and low in cost, the obtained TiO2 quantum dots are good in dispersity, large in specific surface area, small in size (2-3 nm) and narrow in size distribution, the exposure rate of single atoms on the TiO2 surface is increased through the large specific surface area and the small size, and therefore the photocatalytic activity of the material is greatly improved under the condition that the single atom loading capacity is low, and the preparation cost is further reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering, and further belongs to the technical field of photocatalysis, and specifically relates to a single-atom supported TiO 2 Quantum dot photocatalyst and preparation method thereof. Background technique [0002] For a long time, energy and the environment have been two world-class issues that have plagued mankind. Solar-driven water splitting to generate hydrogen is a promising strategy for converting solar energy into hydrogen. TiO 2 Based photocatalysts have been widely used due to their non-toxicity, stable structure, and low production cost. TiO 2 Great progress has been made in various application fields, including photocatalytic water splitting for hydrogen production, wastewater purification or air purification, etc. But for pure TiO 2 , the fast photogenerated carrier recombination and slow proton reduction kinetics hinder its practical application. Therefore, addressing t...

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Problems solved by technology

However, during synthetic and catalytic reactions, single atoms are easily aggregated due to their high surface energy, or are lost due to weak anchoring

In order to solve the problem of single-atom anchoring, researchers often use some complex and difficult-to-control harsh synthesis conditions, which greatly increase the difficulty and cost of synthesis

The most important thing is that single atoms must be on the surface of the catalyst to play a role. The above-mentioned series of complex and difficult to control harsh synthesis conditions cannot guarantee a high surface exposure rate of single atoms, so researchers try to increase the loading of single atoms to Further improving the photocatalytic performance will undoubtedly increase the synthesis cost for supporting noble metal single atoms

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