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green synthesis of functional metallic nanoparticles by dissimilatory metal-reducing bacteria“Shewanella”:A comprehensive review

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Journal of Materials Science & Technology 2023年第27期158卷 63-76页

作者： Jing Yang Peng Ju Xucheng Dong Jizhou Duan Hui Xiao Xuexi Tang Xiaofan Zhai Baorong Hou CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China Open studio for marine Corrosion and Protection Qingdao National Laboratory for Marine Science and TechnologyQingdao 266235China College of Marine Life Sciences Ocean University of ChinaQingdao 266003China Key Laboratory of Marine Eco-Environmental Science and Technology Marine Bioresource and Environment Research CenterFirst Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Sanya Institute of Ocean Eco-Environmental Engineering Sanya 572000China Institute of Marine Corrosion Protection Guangxi Key Laboratory of Marine Environmental ScienceGuangxi Academy of SciencesNanning 530007China

The biosynthesis strategy of nanoparticles has attracted much attention due to the mild synthesis condi-tions,environmental-friendly properties,and low *** nanoparticles(bio-NPs)not only show excellent physicochemical properties,but also exhibit high stability,enlarged specific surface area,and excellent biocompatibility,which are crucial for industrial,agricultural,and medical ***-wanella,a kind of dissimilatory metal-reducing bacteria,is regarded as a typical biosynthesis-functional bacteria class with wide distribution and strong ***,in this paper,functional bio-NPs by Shewanella were reviewed to provide a comprehensive view of current research *** biosynthetic mechanisms of Shewanella are summarized as the Mtr pathway(predominant),extracellular polymeric substance-induced pathway,and enzyme/protein-induced *** the biosynthesis process,bio-logical factors along with the physicochemical parameters highly influenced the properties of the resul-tant *** now,bio-NPs have been applied in various fields including environmental remediation,antibacterial applications,and microbial fuel ***,some challenging issues of bio-NPs by She-wanella remain unsolved,such as optimizing suitable bacterial strains,intelligently controlling bio-NPs,clarifying biosynthesis mechanisms,and expanding bio-NPs applications.

关键词： Shewanella strains Functional metallic nanoparticles green biosynthesis Metal reduction

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green bio-synthesis of Ni/montmorillonite nanocomposite using extract of Allium jesdianum as the nano-catalyst for electrocatalytic oxidation of methanol

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Chinese Journal of Chemical Engineering 2020年第10期28卷 2555-2565页

作者： Mohammad Hossein Sheikh-Mohseni Sajjad Sedaghat Pirouz Derakhshi Aliakbar Safekordi Department of Chemistry Science and Research BranchIslamic Azad UniversityTehranIran Department of Chemistry Shahr-e-Qods BranchIslamic Azad UniversityShahr-e-QodsIran Department of Chemistry North Tehran BranchIslamic Azad UniversityTehranIran

In this work,synthesis of Ni nanoparticles was carried out successfully by water extract of Allium jesdianum as a biochemical reducing agent in the presence of montmorillonite clay(MMT)as a natural solid support for the first *** the electrochemical activity of the synthesized nanocomposite was investigated in methanol electrocatalytic *** with high cation exchange capacity and nano layer structure was exposed to ion exchange conditions in nickel *** Ni^2+ion exchanged form was used in this process as a source of ions and also capping *** extract of Allium jesdianum used as a reducing agent due to abundant availability of phenolic and flavonoid *** synthesized Ni/MMT nanocomposite was characterized using UV–Vis spectroscopy(UV–Vis),Fourier Transform Infrared Spectroscopy(FT-IR),X-ray diffraction(XRD),Scanning Electron Microscopy(SEM),Transmission electron microscopy(TEM)and Energy-dispersive X-ray spectroscopy(EDX).The surface of prepared modified electrode has been characterized using SEM to evaluate the morphology,showing uniform dispersion of Ni nanoparticles with mean diameter of 12 to 20 *** modified carbon paste electrode was then used in methanol electrocatalytic oxidation *** oxidation on the proposed modified electrode surface occurs at 0.6 V and 0.3 V in alkaline and acidic medium ***,the results showed the better performance of modified electrode toward methanol electrocatalytic oxidation in comparison with carbon paste electrode that is modified by ion exchanged *** transfer coefficients and apparent charge transfer rate constant for the modified electrode in the absence of methanol in alkaline medium were respectively found as:αa=0.53,αc=0.37 and ks=1.6×10^-1 s^-***,the average value of catalytic rate constant for the electrocatalytic oxidation of methanol by the prepared nano-catalyst was estimated to be about 0.9 L·mol^-1·s^-1 by chronoamperometry *** prepare

关键词： green biosynthesis Nanoparticles Montmorillonite Biocatalysis Methanol electrocatalytic oxidation Fuel cell

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