研究目的
Investigating the enhanced photocatalytic performance of niobium fiberform nanostructures fabricated using helium plasma irradiation by assessing methylene blue decolorization after oxidation to Nb2O5 in the atmosphere and photodeposition of platinum nanoparticles on the surface.
研究成果
Fiberform nanostructures (FNs) can be formed on Nb surfaces via He plasma irradiation, enhancing photocatalytic performance when combined with Pt nanoparticles. The study demonstrates the potential of plasma-synthesized nanostructures for photocatalytic applications, despite challenges related to crystallinity and surface area optimization.
研究不足
The study is limited by the specific conditions required for FN formation on Nb, including the narrow temperature range and high He fluence. The photocatalytic performance enhancement is balanced by potential crystallinity deterioration due to He implantation.
1：Experimental Design and Method Selection
Helium plasma irradiation was used to fabricate fiberform nanostructures on niobium (Nb) substrates. The process involved He ion implantation forming He nano-bubbles, leading to the formation of protrusions and eventually fiberform nanostructures (FN) under high fluence conditions.
2：Sample Selection and Data Sources
0.1 mm thick Nb samples were exposed to He plasmas in the linear shaped plasma device NAGDIS-II. The surface temperature and incident ion energy were controlled to study morphology changes.
3：List of Experimental Equipment and Materials
NAGDIS-II plasma device, radiation pyrometer (KTL-PRO, Lec Co. Ltd.), scanning electron microscope (SEM), transmission electron microscope (TEM), x-ray photoelectron spectroscopy (XPS), ultraviolet-visible spectrophotometry (UV-Vis), UV-2600 spectrophotometer (Shimadzu Co. Ltd.), thermal desorption spectroscopy (TDS) system.
4：Experimental Procedures and Operational Workflow
The Nb samples were exposed to He plasmas under controlled surface temperatures and incident ion energies. Post-irradiation, samples were oxidized and Pt nanoparticles were photo-deposited. The photocatalytic activity was assessed using methylene blue (MB) decolorization under UV light irradiation.
5：Data Analysis Methods
The photocatalytic activity was measured by the decolorization rate of MB solution under UV light. Surface analysis was conducted using SEM, TEM, XPS, and UV-Vis spectrophotometry.
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