Preparation, characterization, and chemical-induced hydrophobicity of thermostable amine-modified graphene oxide

Abstract

A small molecule was grafted onto the graphene oxide surfaces using two different approaches and the obtained amine-modified graphene oxides have excellent thermal stability and significantly enhanced water/air contact angles.

Improvement of Corrosion Resistance of Waterborne Polyurethane Coatings by Covalent and Noncovalent Grafted Graphene Oxide Nanosheets

“…GO was prepared by a strong oxidizing reaction through a modified Hummers’ method. , Briefly, graphite flake (2.0 g) and NaNO 3 were dispersed in 200 mL of H 2 SO 4 in a beaker under constant stirring in an ice-water bath. After 30 min, 9.0 g of KMnO 4 was tardily added to the mixture while keeping the temperature below 10 °C for an hour.…”

High-Performance Perovskite Solar Cells Engineered by an Ammonia Modified Graphene Oxide Interfacial Layer

“…Even so, formation of a homogeneous uniform GO layer was shown to be difficult on indium tin oxide (ITO), which hinders improving further the hole transport due to the direct contact of perovskite active layer and ITO . It was reported that a moderate amount of amine introduced into GO solution can further regulate and control the conductivity of GO, − which could make GO more desirable as an interfacial material in PSCs.…”

“…PEDOT:PSS is a commonly used hole transport layer (HTL) on ITO in conventional organic solar cells owing to its good conductivity, high work function, and solution process ability. − ,,,− Herein, a simply method was proposed to prepare the PEDOT:PSS-ammonia modified graphene oxide (GO:NH 3 ) double-layer composite films by simply spin-coating the GO:NH 3 solution onto the PEDOT:PSS layer on ITO as a composite HTL in the planar PSCs after the GO:NH 3 solution was made by adding proper amount of ammonia into GO aqueous solution. The composite films were used as an anode interfacial layer in CH 3 NH 3 PbI 3‑ x Cl x : PCBM based planar PSCs.…”

Addition and Correction to “Mechanistic Aspects of the Functionalization of Graphene Oxide with Ethylene Diamine: Implications for Energy Storage Applications”

“…We observed the emergence of an amide I peak at ∼1648 cm –1 and amide II peak at ∼1581 cm –1 in EDA/GO synthesized in the absence of EDC/NHS, which were absent in pure EDA and GO, in agreement with previously reported work involving formation of amides (Figure ). − Both amide I and II peaks at ∼1648 and ∼1581 cm –1 are considerably distant from the ethylenediamine peak observed at ∼1595 cm –1 , and therefore the ∼1648 cm –1 peak cannot be due to residual ethylenediamine.…”