Controlled synthesis of biogenetic palladium for catalyzing aromatic contaminants reduction: the role of nanoparticle size and extracellular distribution
The size of biologically derived Pd nanoparticles size were controlled in this study to investigate its on catalytic reduction of aromatic contaminants (nitrobenzene and p-chlorophenol).The catalytic activities ofbioPd were tested both as catalyst coated directly onto solid electrode surface and catalysts dispersed in solutions.The results indicated that the catalytic efficiency for nitrobenzene and p-chlorophenol reduction went up along with the size increase of suspension bioPd,but descended abruptly when the size ofbioPd continued increase to larger than 50 nm.Otherwise,bioPd could be used directly as efficient electrocatalyst by adjusting the optimum ratio of cell dry weight (CDW) to Pd.The best electrocatalytic performances for nitrobenzene and p-chlorophenol catalytic reduction were all observed on the largest size of bioPd from group E (76±34 nm) decorated electrode,which exerted favorable conductivity.Based on morphological structure and catalytic performance analysis indicated that the optimum nanoparticles size (32 ± 17 nm) combined with large coverage surface area (5.5 ± 2.2 × 104 nm2/μm) was essential to improve the catalytic activity of bioPd used in suspension.While,the performance of bioPd coated onto electrode surface was mainly depended on the conductive structure and extracellular synthesis procedure,which made a big difference in promoting electron transfer and meliorating electrocatalytic activities.These results indicated that it is controllable to enhance catalytic activity towards reductive degradation of environmental contaminants by regulating the relationship of size distribution and coverage area.
Biogenetic palladium nanoparticle size catalytic activity nitrobenzene p-chlorophenol
Ya-Nan Hou Bo Zhang Hui Yun Zhen-Ni Yang Jing-Long Han Jizhong Zhou Ai-Jie Wang Hao-Yi Cheng
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Hua Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chine
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
503-507
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）