title: Improving effect of metal and oxide nanoparticles encapsulated in porous silica on fermentative biohydrogen production by Clostridium butyricum.
abstract: This paper investigated the enhancement effect of nanometre-sized metallic (Pd, Ag and Cu) or metallic oxide (FexOy) nanoparticles on fermentative hydrogen production from glucose by a Clostridium butyricum strain. These nanoparticles (NP) of about 2-3 nm were encapsulated in porous silica (SiO2) and were added at very low concentration (10(-6) mol L(-1)) in batch hydrogen production test. The cultures containing iron oxide NP produced 38% more hydrogen with a higher maximum H2 production rate (HPR) of 58% than those without NP or with silica particles only. The iron oxide NP were used in a 2.5L sequencing-batch reactor and showed no significant effect on the yields (established at 2.2 mol(hydrogen) mol(glucose)(-1)) but an improvement of the HPR (+113%, reaching a maximum HPR of 86 mL(hydrogen) L(-1) h(-1)). These results suggest an improvement of the electron transfers trough some combinations between enzymatic activity and inorganic materials.
authors: Centre Wallon de Biologie Industrielle (CWBI), Département des Sciences de la Vie, Université de Liège, Liège, Belgium. beckers.laurent@gmail.com
authors: Laurent
authors: L
authors: Beckers
authors: Serge
authors: S
authors: Hiligsmann
authors: Stéphanie D
authors: SD
authors: Lambert
authors: Benoît
authors: B
authors: Heinrichs
authors: Philippe
authors: P
authors: Thonart
mesh_terms: D000693:Anaerobiosis / Q000187:drug effects; D019149:Bioreactors / Q000382:microbiology; D002245:Carbon Dioxide / Q000378:metabolism; D002384:Catalysis / Q000187:drug effects; D046972:Clostridium butyricum / Q000187:drug effects / Q000378:metabolism*; D005285:Fermentation / Q000187:drug effects*; D005290:Ferric Compounds / Q000494:pharmacology*; D006859:Hydrogen / Q000378:metabolism*; D053768:Metal Nanoparticles / Q000737:chemistry*; D016062:Porosity; D012822:Silicon Dioxide / Q000494:pharmacology*; D012995:Solubility
chemical_list: D005290:Ferric Compounds; D002245:Carbon Dioxide; C000499:ferric oxide; D012822:Silicon Dioxide; D006859:Hydrogen