By a News Reporter-Staff News Editor at Science Letter -- Current study results on Photocatalytics have been published. According to news reporting out of Uppsala, Sweden, by NewsRx editors, research stated, "Biomedical implants and devices that penetrate soft tissue are highly susceptible to infection, but also accessible for UV induced decontamination through photocatalysis if coated with suitable surfaces. As an on-demand antibacterial strategy, photocatalytic surfaces should be able to maintain their antibacterial properties over repeated activation."
Our news journalists obtained a quote from the research from Uppsala University, "This study evaluates the surface properties and photocatalytic performance of titania films obtained by H2O2-oxidation and heat treatment of Ti and Ti-6Al-4V substrates, as well as the prospect of assisting photocatalytic reactions with H2O2 for improved efficiency. H2O2-oxidation generated a nanoporous coating, and subsequent heat treatment above 500 degrees C resulted in anatase formation. Tests using photo-assisted degradation of rhodamine B showed that prior to heat treatment, an initially high photocatalytic activity (PCA) of H2O2-oxidized substrates decayed significantly with repeated testing. Heat treating the samples at 600 degrees C resulted in stable yet lower PCA. Addition of 3% H2O2 during the photo-assisted reaction led to a substantial increase in PCA due to synergetic effects at the surface and H2O2 photolysis, the effect being most notable for non-heat treated samples."
According to the news editors, the research concluded: "Both heat treated and non-heat treated samples showed stable PCA through repeated tests with H2O2-assisted photocatalysis, indicating that the combination of H2O2-oxidized titania films, UV light and added H2O2 can improve efficiency of these photocatalytic surfaces."
For more information on this research see: Stability and prospect of UV/H2O2 activated titania films for biomedical use. Applied Surface Science, 2013;285():317-323. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Applied Surface Science - www.elsevier.com/wps/product/cws_home/505669)
Our news journalists report that additional information may be obtained by contacting E. Unosson, Uppsala University, Dept. of Engn Sci, Angstrom Lab, Div Nanotechnol & Funct Mat, S-75121 Uppsala, Sweden. Additional authors for this research include K. Welch, C. Persson and H. Engqvist (see also Photocatalytics).
Keywords for this news article include: Sweden, Europe, Uppsala, Treatment, Photocatalyst, Nanotechnology, Emerging Technologies
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