2006/01/01 by Kaiqian Shu, Chitiphon Chuaicham, Yuto Noguchi +3
Computer Science · Energy · Engineering · #Advanced Photocatalysis Techniques #Gait Recognition and Analysis #Human Pose and Action Recognition #Video Surveillance and Tracking Methods
paper · doi:10.1016/j.jhazmat.2023.132337
openalex publication_date 2006/01/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/23
The heterojunction structure of the photocatalyst composite, which necessitates a robust interface and sufficient contact areas, holds the key to obtaining high charge carrier migration efficiency. Here, a novel composite, TiO<sub>2</sub> nanoparticles/Fe-doped hydroxyapatite (TONPs/FHCS), is fabricated using a two-step synthetic technique, in which FHCS is synthesized from artificial converter slag enriched with Fe and Ca. The unique nanorod@plate structure of FHCS enables the uniform immobilization of TONPs onto FHCS. Thereby, an n-n type heterojunction exhibits a highly intimate Ti-O-Fe heterointerface. Kelvin probe testing demonstrates the formation of an interfacial electric field oriented from FHCS to TONPs, which serves as the driving force for interfacial electron transfer through the Ti-O-Fe channels. The photoacoustic signals provide information on electron trap levels and densities, indicating the formation of the electron transfer channels. •O<sub>2</sub><sup>-</sup> and •OH species are responsible for being the active species in this system. A photoexcited carrier transfer pathway exhibiting an S-scheme mechanism with high separation efficiency significantly enhances the utilization of charge carriers in each phase. Thus, improved xanthate degradation has been achieved using a heterojunction containing a photocatalyst derived from industrial solid waste. This work demonstrates the significant potential of steel-making byproduct utilization in industrial wastewater treatment.