Current advances in all-solid-state dual Z-Scheme heterojunction photocatalysts
Photocatalytic technology has shown great potential in addressing energy and environmental issues.However,factors such as low visible light utilization efficiency,high carrier recombination rate,and poor oxidation-reduction ability have led to unsatisfactory photocatalytic activity of single-component semiconductors.Therefore,developing effective strategies to enhance the photocatalytic activity of semiconductors is crucial for the application of photocatalytic technology.By constructing dual Z-scheme heterojunctions,the lifetime of carriers can be prolonged,the range of light absorption can be extended,the concentration of photo-generated carriers can be increased,and the oxidation-reduction potential can be enhanced.At the same time,dual Z-scheme heterojunctions have multiple electron transfer channels which facilitate photoexcited electron migration and promote efficient separation of electron-hole pairs.In recent years,dual Z-scheme heterojunctions have undergone rapid development and their theoretical systems have become relatively mature.However,there are few reviews on dual Z-scheme heterojunction photocatalysts.This paper provides a detailed introduction to the types of binary and dual Z-scheme heterojunctions,summarizes the advantages of dual Z-scheme heterojunctions in improving photocatalytic efficiency,focuses on verifying methods for dual Z-scheme heterojunctions,and comprehensively discusses the applications of dual Z-scheme heterojunctions in pollutant treatment,water splitting to produce hydrogen,CO2 reduction,photocatalytic nitrogen fixation,and cell inactivation.The challenges faced by dual Z-scheme heterojunction photocatalysts are discussed along with possible future directions.The summary and outlook presented in this paper will provide useful references for developing more efficient dual Z-scheme heterojunctions.
万方数据
