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Title of Paper:Interface engineering and oxygen enhancement mechanisms in surface metal-decorated TiO2 photocatalysts for efficient ammonia nitrogen removal

Journal:Applied Surface Science

Place of Publication:Elsevier

Summary:Loading metals on the surface of titanium dioxide (TiO2) has emerged as an attractive approach to enhance the ammonia–nitrogen (NH4+-N) removal performance. Herein, we comparatively investigated the NH4+-N removal performance of transition metals loaded onto TiO2 via an in-situ photodeposition method. Metal-TiO2 interface affects the valence state transitions and Interface effect, which critically regulate charge transfer efficiency and influence reactive oxygen species (ROS) generation in photocatalytic ammonia nitrogen degradation. Therefore, oxygen introducing promotes the degradation of NH4+-N. Under the oxygen-supplied condition, we found that the NH4+-N conversion efficiencies of Cu-TiO2 and Pd-TiO2 photocatalysts increase to 30.8 % and 44.8 %, respectively, achieving the optimal degradation efficiency. This work systematically investigates the comparison of NH4+-N removal effects by metal-decorated TiO2 prepared via the same method under different conditions. The analysis reveals the interfacial regulation between metals and TiO2 in governing ROS-driven degradation, yielding key mechanistic guidance for the development of high-efficiency catalysts for ammonia-rich wastewater treatment.

First Author:Lihui Xiao

Correspondence Author:Liang Guo,Zuoli He

All the Authors:Ziye Zheng,Yi Ren,Meng Dai,Huijun Yu,Hongsheng Li,Shuguang Wang

Indexed by:Journal paper

Document Code:165920

Discipline:Engineering

Document Type:J

Page Number:165920

Impact Factor:6.9

DOI Number:10.1016/j.apsusc.2026.165920

Number of Words:8000

Translation or Not:No

Date of Publication:2026-01

Included Journals:SCI

Links to Published Journals:https://doi.org/10.1016/j.apsusc.2026.165920

Release Time:2026-01-14