TiO2 Nanotube Arrays Decorated with Polydopamine/Ag Nanoparticles for Photoelectrochemical Applications
Source abstract
Abstract
Abstract In this work, a ternary Ag/polydopamine (PDA)/TiO2 nanotube array photoanode is designed for photocathodic protection of 304 stainless steel. Ag nanoparticles are immobilized onto spaced TiO2 nanoarrays using PDA as an adhesive, which provides functional groups that promote Ag nucleation and dispersion. Under illumination, the SPR effect of Ag extends visible-light absorption, while the π-π conjugated structure of PDA serves as an electron transport channel. Photogenerated electrons are transferred from Ag and the PDA LUMO to the TiO2 conduction band, and subsequently to the 304SS substrate. The composite photoanode achieves a photocurrent density of 41 μA/cm2 and an open-circuit potential of −710 mV vs SCE. The roles of Ag and PDA in charge separation and transport are explored through comparative analysis of TiO2, PDA/TiO2, Ag/TiO2, and Ag/PDA/TiO2 systems. This study provides an optimized composite material and reveals the preliminary working mechanism of the ternary system for photocathodic protection.
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Research context
OpenAlex topics: TiO2 Photocatalysis and Solar Cells · Conducting polymers and applications · Gold and Silver Nanoparticles Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Chinese Academy of Sciences , , ,
University of Chinese Academy of Sciences , ,
Luoyang Ship Material Research Institute , , ,
Hainan University , , ,
Qingdao University , , ,
Funding
Institute of Oceanology, Chinese Academy of Sciences · National Natural Science Foundation of China · Flexible Talent Innovation Platform Project in Hainan Province
References (66)
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