Room-Temperature Reduction of Graphene Oxide in Water by Metal Chloride Hydrates: A Cleaner Approach for the Preparation of Graphene@Metal Hybrids

Abstract

<jats:p>Headed for developing minimalistic strategies to produce graphene@metal hybrids for electronics on a larger scale, we discovered that graphene oxide (GO)-metal oxide (MO) hybrids are formed spontaneously in water at room temperature in the presence of nothing else than graphene oxide itself and metal ions. Our observations show metal oxide nanoparticles decorating the surface of graphene oxide with particle diameter in the range of 10–40 nm after only 1 h of mixing. Their load ranged from 0.2% to 6.3% depending on the nature of the selected metal. To show the generality of the reactivity of GO with different ions in standard conditions, we prepared common hybrids with GO and tin, iron, zinc, aluminum and magnesium. By means of carbon-13 solid-state nuclear magnetic resonance using magic angle spinning, we have found that graphene oxide is also moderately reduced at the same time. Our method is powerful and unique because it avoids the use of chemicals and heat to promote the coprecipitation and the reduction of GO. This advantage allows synthesizing GO@MO hybrids with higher structural integrity and purity with a tunable level of oxidization, in a faster and greener way.</jats:p>

Antimicrobial study of cast post and its surface modification with nanoparticle

“…[ 29 ] The preprosthetic treatment of a root-filled tooth consists primarily of rebuilding lost tooth structure using an alloplastic material to provide a preparation with adequate frictional surfaces for retaining a crown or bridge. [ 30 ]…”

Selection of Highly Specific Aptamers by Graphene Oxide-SELEX to Ultrasensitive Label-Free Impedimetric Biosensor Development for Glyphosate Detection

“…Phosphate-buffered saline pH 7.4 (PBS), potassium ferrocyanide (K 4 Fe­(CN) 6 ), potassium ferricyanide (K 3 Fe­(CN) 6 ), and magnesium chloride (MgCl 2 ), were purchased from Sigma-Aldrich (Oakville, ON, CAN) at ≥98.5% purity. GO was synthesized following a modified Hummer’s method, as reported by our group. , The obtained graphene oxide was characterized by different methods including FT-IR, atomic force microscopy, Raman spectroscopy, and scanning electron microscopy (see Supporting Information). The used homogeneous GO solution (5 mg/mL) was prepared by stirring and sonication.…”

“…GO was synthesized following a modified Hummer's method, as reported by our group. 39,40 The obtained graphene oxide was characterized by different methods including FT-IR, atomic force microscopy, Raman spectroscopy, and scanning electron microscopy (see Supporting Information). The used homogeneous GO solution (5 mg/mL) was prepared by stirring and sonication.…”

Obtention and Characterization of Ferrous Chloride FeCl2·4H2O from Water Pickling Liquors

“…Among the different ferrous salts, there is a great interest in FeX 2 •4H 2 O systems, especially FeCl 2 •4H 2 O, due to their potential applications in chemistry and composite material areas [15]. FeCl 2 •4H 2 O is commonly used as a reducing [16,17] and electrolytic agent [18], for the synthesis of pharmaceutical compounds [19,20], or for water treatment [21,22]. Despite ferrous chloride being obtained from water pickling liquors, to the best of our knowledge, the structural characterization of FeCl 4 •4H 2 O has been scarcely investigated.…”