Kalathil Shafeer, Chaudhuri Rajib Ghosh
Division of Biological and Environmental Science & Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
Department of Chemical Engineering, Birla Institute of Technology & Science, Pilani-Dubai Campus, Dubai International Academic City, P.O. Box No. 345055, Dubai, UAE.
Materials (Basel). 2016 Aug 4;9(8):653. doi: 10.3390/ma9080653.
Dye wastewater severely threatens the environment due to its hazardous and toxic effects. Although many methods are available to degrade dyes, most of them are far from satisfactory. The proposed research provides a green and sustainable approach to degrade an azo dye, methyl orange, by electrically active biofilms (EABs) in the presence of solid and hollow palladium (Pd) nanoparticles. The EABs acted as the electron generator while nanoparticles functioned as the electron carrier agents to enhance degradation rate of the dye by breaking the kinetic barrier. The hollow Pd nanoparticles showed better performance than the solid Pd nanoparticles on the dye degradation, possibly due to high specific surface area and cage effect. The hollow cavities provided by the nanoparticles acted as the reaction centers for the dye degradation.
染料废水因其有害和有毒影响而严重威胁环境。尽管有许多方法可用于降解染料，但大多数方法都远不能令人满意。本研究提出了一种绿色可持续的方法，即在固体和空心钯（Pd）纳米颗粒存在的情况下，通过电活性生物膜（EABs）降解偶氮染料甲基橙。EABs作为电子发生器，而纳米颗粒作为电子载体，通过打破动力学障碍来提高染料的降解速率。空心Pd纳米颗粒在染料降解方面表现出比实心Pd纳米颗粒更好的性能，这可能是由于高比表面积和笼效应。纳米颗粒提供的空腔充当了染料降解的反应中心。
