مشخصات پژوهش

عنوان	Immobilization of glucose oxidase onto a novel platform based on modified TiO 2 and graphene oxide, direct electrochemistry, catalytic and photocatalytic activity
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Titanium oxide Glucose oxidase Electrodeposition Biosensor Photocatalytic
چکیده	In this work a new organic–inorganic nanocomposite has been introduced for enzyme immobilization. The composite consisting of graphene oxide (GO) and titanium oxide nanoparticles (TiO2) modified with 2, 2′-dithioxo-3, 3′-bis (3-(triethoxysilyl) propyl)-2H, 2′H-[5, 5′-bithiazolylidene]-4, 4′(3H, 3′H)-dione as Organic-Inorganic Supporting Ligand (OISL). The OISL was covalently attached to TiO2 nanoparticles and employed for obtaining a suitable solid surface to enzyme attachment. The glucose oxidase (GOD) was irreversibly loaded on the GC/ GO/TiO2-OISL using consecutive cyclic voltammetry. The enzyme immobilization and the enzymatic activity were determined by electrochemical methods. The cyclic voltammogram displayed a pair of well-defined and nearly symmetric redox peaks with a formal potential of −0.465 V and an apparent electron transfer rate constant of 1.74 s−1. The GO/TiO2-OISL can catalyze the electroreduction and electrooxidation of hydrogen peroxide. The GC/GO/TiO2-OISL/GOD electrode was used in the hydrogen peroxide determination. The fabricated nanobiocomposite shows dramatic photoelectrocatalytic activity which evaluated by studying the electrocatalytic activity of the fabricated electrode toward hydrogen peroxide in darkness and in the presences of light
پژوهشگران	عبدالله سلیمی (نفر سوم)، نسیبه حقیقی (نفر اول)، رحمان حلاج (نفر دوم)