Necklace-architected Ag/AgBr/TiO₂ nanofiber composites: dual-mode catalysis for synchronous SERS detection and solar-driven decontamination of RhB/Cr(VI) in wastewater
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引用次数: 0
Abstract
Integrating photocatalytic degradation and surface-enhanced Raman spectroscopy (SERS) detection into a single nanocomposite platform offers transformative potential for intelligent wastewater treatment. Herein, we engineered necklace-architected Ag/AgBr/TiO2 nanofiber composites through in situ growth of Ag/AgBr nanoparticles on electrospun porous TiO2 nanofibers. The unique architecture synergizes dual-phase anatase/rutile alignment, (001)-faceted anatase TiO2, and plasmonic Ag/AgBr-TiO2 heterojunctions, achieving 100% RhB degradation in 10 min (vs. 23.3% UV/42.2% Vis) and 93.6% Cr(VI) reduction in 40 min under simulated sunlight, outperforming commercial P25, single-component counterparts, and previously reported TiO2-based photocatalysts. Notably, this study pioneers the integration of SERS detection with photocatalytic decontamination in a single system, enabling real-time monitoring of RhB and Cr2O72⁻ degradation processes via the plasmonic resonance of Ag/AgBr/TiO2. The dual-mode “detect-and-treat” functionality leverages the necklace-like morphology for enhanced charge separation, light scattering, and molecular adsorption, establishing a paradigm for intelligent wastewater remediation.
期刊介绍：
The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size.
Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology.
The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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