How to produce graphene from the oxidative exfoliation method?

How to produce graphene from the oxidative exfoliation method? Graphene 28 April 2020


Oxidative exfoliation: the process

Also called Hummers’ method, the oxidative exfoliation process is one of the most ancient ones to produce graphene, and is still widely used. Indeed, its industrialization is relatively straightforward, since the industrial technique is well known.

For this exfoliation method, graphite is commonly oxidized under harsh conditions to obtain graphite oxide. This material can be dispersed by sonication in polar solvents, i.e. water, to form graphene oxide (GO) layers.

Advantages and drawbacks

The oxidation introduces a large amount of oxygen containing functional groups which allows the exfoliation and obtention of SLG graphene and ensures the stability in dispersion without the need of further additives.

However, these functional groups interrupt the honeycomb structure of graphene which is responsible for its extraordinary properties. Therefore, this family of graphene materials can have lowered thermal or electrical conductivity. In order to resolve this problem, graphene oxide is most commonly reduced with agents, like hydrazine, or through electrochemical approaches to form so-called reduced graphene oxide (rGO). However, this reduction process is never 100% complete.

What to remember about the process of oxidative exfoliation ?

Even if rGO is still slightly oxidized compared to pristine graphene, it has been used for the development of many applications and has shown its convenience.

The GOs and rGOs available in powder form raise the question of the reaggregation of graphene sheets within these powders, as well as the impact of their use on the respiratory system.

In this category

Graphene has many benefits for the construction industry

Graphene: an innovative ally for sustainable buildings

In a context where the transition to more sustainable, environmentally-friendly construction has become a priority, the integration of innovative materials and disruptive technologies plays a crucial role. Among these materials, graphene is a promising solution for revolutionizing the building sector. In this article, Carbon Waters takes a look at the current state of play in […]

Read more
Le graphène permet d'alléger les avions et renforcer leurs structures

Aerospace: how does graphene meet the sector’s challenges?

Faced with global warming, the aerospace industry is in the throes of a real environmental crisis, and must achieve carbon neutrality by 2050 – a considerable challenge for the entire sector. Thanks to its multiple properties, graphene ticks all the boxes when it comes to meeting the challenges facing the aeronautics sector: decarbonization through lighter […]

Read more
Le graphène comme solution pour augmenter la durée de vie des éoliennes

Wind power: what are the challenges and how...

Since the early 1990s, more and more wind turbines – modern windmills that convert the energy of the wind into electricity – have been blooming in our landscapes. As part of the energy transition, the wind turbine market is expanding to offer greener energy with controlled environmental impact. According to Ademe, this energy source is […]

Read more



* required fields


Newsletter subscription