title: A Pd/SBA-15 composite: synthesis, characterization and protein biosensing.
abstract: In this paper, palladium (Pd) nanoparticles have been successfully encapsulated into the channels of modified SBA-15 in situ via a facile, ethylene glycol (EG)-assisted sonochemical method. The products were confirmed by x-ray diffraction, transmission electron microscopy (TEM) and nitrogen adsorption analysis. The Pd/SBA-15 composite was used for the realization of direct electron transfer of hemoglobin (Hb). Electrochemical results showed that the Pd nanoparticles in the channels of SBA-15 could enhance the direct electron transfer between Hb and the electrode surface. The composite modified electrode displayed excellent electrochemical behavior. The sensor fabricated by the composite showed an excellent response to the reduction of hydrogen peroxide (H(2)O(2)), and the linear range for the determination of H(2)O(2) was from 1.8 to 119.3 microM with a detection limit of 0.8 microM.
authors.affiliation: Key Laboratory of Mesoscopic Chemistry and Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China.
authors.forename: Yuge
authors.initials: Y
authors.lastname: Liu
authors.forename: Jingjing
authors.initials: J
authors.lastname: Zhang
authors.forename: Wenhua
authors.initials: W
authors.lastname: Hou
authors.forename: Jun-Jie
authors.initials: JJ
authors.lastname: Zhu