CSIR-NEIST Turns India's Low-Grade Graphite into Graphene Oxide

In a 2026 study published in ACS Sustainable Resource Management, scientists at CSIR-NEIST in Jorhat, Assam, demonstrated a process that turns India's low-grade natural graphite into graphene oxide, attacking the country's dependence on imported carbon materials at the least glamorous and most strategic point in the chain: the raw material itself.

Why feedstock sovereignty matters

Almost every conversation about graphene focuses on the finished product, the wonder-material applications. The quieter problem is the input. Graphene and its workhorse precursor, graphene oxide, are typically made from high-grade graphite, and India is short of it, importing on the order of 69% of the graphite it uses. A graphene industry built on imported feedstock is only half-sovereign, however many downstream factories it has, because the dependency has simply been pushed one step upstream.

The CSIR-NEIST work goes after exactly that. Starting from low-grade graphite sourced in Arunachal Pradesh, raw material with a fixed-carbon content of only about 20.4% and a dominant silica impurity of roughly 80.1%, the team used a one-pot acid-leaching route to strip out impurities and enrich the carbon, then oxidised and reduced it to produce graphite oxide, graphene oxide and reduced graphene oxide. In plain terms, it shows that deposits previously dismissed as too poor to bother with can be beneficiated into a usable nanomaterial precursor.

From ore to material

Graphene oxide is the practical starting point for much of the graphene economy: it disperses readily in liquids, can be processed into films, composites and coatings, and can be reduced back toward graphene-like conductivity when an application needs it. A scalable, low-cost route from cheap domestic ore to graphene oxide is therefore the unglamorous enabling step beneath any downstream graphene product, and it complements supply-side moves such as Coal India securing its first graphite block.

The caveats are appropriate to a laboratory demonstration. Final yields and the material's behaviour at industrial scale were not fully detailed in the available reporting, and the leap from a bench process to tonnes of consistent, specification-grade material is precisely where many materials breakthroughs stall. But the strategic instinct is exactly right: if India wants a graphene industry, it has to be able to make the precursor from rock it actually has in the ground, and this is a concrete step in that direction.