Effects of phenylhydrazine-4-sulfonic acid on the reduction of GO and preparation of hydrophilic graphene with broad pH stability and antioxidant activity

Abstract

Sulfonated graphene had high solubility, broad pH stability and good antioxidative effect.

One‐step synthesis of hydrophilic graphene‐Fe3O4‐PVA composite film: Micromorphology and performance

“…Graphene oxide (GO) was synthesized with improved Hummers method, and hydrophilic graphene (HG) was prepared from GO and phenylhydrazine‐4‐sulfonic acid (PHS) at 85 °C by the previous method …”

“…In the present study, we used hydrophilic graphene (HG), a kind of FG, to obtain a magnetic HG‐Fe 3 O 4 ‐PVA (GFP) composite film through one‐pot coprecipitation. The composites exhibited excellent mechanical and flame‐retarding properties and a fast magnetic response.…”

Effect of Ni Nanoparticles on HG Sheets Modified by GO on the Hydrogen Evolution Reaction

“…Particularly, Wang et al have developed a Ni–graphene (Ni–rGO) composite to make good use of the conductivity and large surface area of graphene with prominent electrocatalytic activity for the HER in alkaline solutions. ,− However, it still has a lot of room for improvement because the graphene sheets generated by the modified Hummers , method have difficulty dissolving in solvents, and they easily form inevitable agglomerates, which limits efficacy toward the HER. To decrease the agglomeration of graphene and further improve the catalytic activity of hydrogenation, we modified graphene oxide (GO) with phenylhydrazine-4-sulfonic (PHS) in which containing hydrophilic functional groups (sulfonic acid), and the oxygen-containing functional groups on the GO edge, were replaced by sulfonic acid groups to form hydrophilic graphene (HG). , Hydrophilic sulfonic acid groups can decrease GO agglomeration and improve GO water solubility. It is recorded that HG is able to readily form homogeneous solutions and can be kept for several months without precipitation in the pH range 3–10, which facilitates efficacy toward the HER.…”

“…To decrease the agglomeration of graphene and further improve the catalytic activity of hydrogenation, we modified graphene oxide (GO) with phenylhydrazine-4-sulfonic (PHS) in which containing hydrophilic functional groups (sulfonic acid), and the oxygen-containing functional groups on the GO edge, were replaced by sulfonic acid groups to form hydrophilic graphene (HG). , Hydrophilic sulfonic acid groups can decrease GO agglomeration and improve GO water solubility. It is recorded that HG is able to readily form homogeneous solutions and can be kept for several months without precipitation in the pH range 3–10, which facilitates efficacy toward the HER. For the current study, HG was used to study photocatalysis and achieved good results .…”

One-Step Reduction and Surface Modification of Graphene Oxide by 3-Hydroxy-2-Naphthoic Acid Hydrazide and Its Polypropylene Nanocomposites

“…This is entirely based on its excellent properties such as good thermal and electrical conductivities, large theoretical specific surface area, flexibility, high intrinsic mobility and chemistry stability [ 10 , 11 ]. To produce graphene sheets, there already exist various effective methods, for example, mechanical exfoliation [ 1 ], chemical vapor deposition (CVD) [ 12 , 13 , 14 , 15 ], oxidation-reduction method [ 16 , 17 ], unzipping of carbon nanotubes [ 18 , 19 , 20 ], electrochemical method [ 21 , 22 ] and crystal epitaxial growth method [ 23 , 24 ] and so on.…”