Dual application of Shewanella oneidensis MR-1 in green biosynthesis of Pd nanoparticles supported on TiO2 nanotubes and assisted photocatalytic degradation of methylene blue

IET Nanobiotechnology
Xiaojie SongMi Yang

Abstract

Biosynthesised nanocomposites have attracted growing interests attributed to their 'green' synthesis nature in recent years. Shewanella oneidensis MR-1, a dissimilatory metal-reducing bacterium, was used to reduce palladium (II) nitrate to palladium (0) nanoparticles (Pd NPs) under anaerobic conditions, resulting in the in situ formation of Pd NPs immobilised on TiO2 nanotubes (TNTs) (Pd/TNTs nanocomposites). The Pd/TNTs nanocomposites were characterised by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, energy dispersive X-ray, and electron spin resonance, respectively. The results indicated that Pd NPs are successfully grown on the TNTs without aggregation. Photocatalytic degradation of methylene blue (MB) by Pd/TNTs nanocomposites under simulated sunlight was also investigated. Pd/TNTs nanocomposites had photocatalytic efficiency superior to that of single TiO2 nanomaterials. The photocatalytic activity of Pd/TNTs nanocomposites can be enhanced by S. oneidensis MR-1. The results showed that after only 10 min, the degradation ratio of MB reached 98.7% by Pd/TNTs nanocomposites when simultaneously assisted with S. oneidensis MR-1.

References

Oct 9, 2002·Nature Biotechnology·John F HeidelbergClaire M Fraser
Jun 7, 2005·Inorganic Chemistry·San Hua LimJianyi Lin
Dec 1, 2005·Journal of the American Chemical Society·Yujie XiongYounan Xia
Aug 30, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Susanta K MohapatraMano Misra
Dec 17, 2009·Journal of Bacteriology·Hui WangJonathan R Lloyd
Aug 12, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Andrei HonciucJoerg Libuda
Sep 21, 2013·Chemical Society Reviews·Liqiang JingHonggang Fu

❮ Previous
Next ❯

Related Concepts

Related Feeds

Bioremediation (ASM)

Bioremediation is the treatment and removal of harmful pollutants or contaminants through the use of microorganisms. Discover the latest research here.