Graphene Oxide: Introduction and Market News

Researchers from Pohang University of Science and Technology, Griffith University and King Khalid University have developed a graphene-based nanofiltration system that can selectively extract lithium ions from magnesium‑rich brines using sunlight as the driving force. The approach combines edge‑functionalized graphene nanoribbons (GNRs) with photothermally reduced graphene oxide (PrGO), forming sub‑nanometer ion‑coordination channels that enable efficient lithium transport while rejecting competing ions such as magnesium.

Recovering lithium from natural brines is difficult because lithium typically exists at much lower concentrations than other dissolved salts. In South American salt‑flat brines, for example, magnesium concentrations can exceed lithium by ratios of 20:1 or higher. The challenge arises from the similar chemical behavior of the ions, even though their hydration energies differ significantly. Magnesium ions bind water molecules roughly four times more strongly than lithium ions. The new membrane exploits this difference by creating functionalized transport pathways that encourage lithium ions to partially shed their hydration shells and migrate through the membrane while magnesium remains strongly hydrated and effectively blocked.

Researchers from Lanzhou University, University of Science and Technology Beijing and the Chinese Academy of Sciences (CAS) have developed a new class of hollow graphene aerogel fibers (GAFs) inspired by the ultra-efficient thermal insulation of polar bear hair. By translating nature’s design into a scalable, coaxial-extrusion-spinning process, the team achieved a multifunctional fiber that sets records for both electrical conductivity and thermal insulation, paving the way for next-generation smart textiles.

Each fiber features a hierarchically porous, hollow structure, closely mimicking the air-trapping tubes of polar bear fur. During fabrication, graphene oxide (GO) nanoplates in the outer spinning channel self-assemble under shear stress into an arch-like microstructure, while a removable core material shapes the central cavity. After a hydrothermal reduction and high-temperature annealing - up to 2000 °C - the resulting structure combines low density with tunable electro-thermo-mechanical properties.

Researchers from China's Dalian Jiaotong University and South China Academy of Advanced Optoelectronics have developed a graphene-based electrode for supercapacitors using a novel slit evaporation self-assembly process. The resulting freestanding sulfuric acid-treated reduced graphene oxide/commercial graphene (S-ATrGO/CG) films demonstrate excellent energy storage capabilities and durability, potentially benefitting graphene-enhanced supercapacitors.

The team introduced a capillary slit-assisted self-assembly method that leverages narrow glass slits to guide the controlled stacking of graphene flakes during solvent evaporation. This process promotes highly ordered, laminated structures, reducing the common issue of flake restacking that limits ion transport in conventional graphene films. Capillary forces, combined with π–π interactions and electrostatic attraction, ensure that sulfuric acid-treated graphene oxide (ATGO) and commercial graphene (CG) align into continuous, freestanding films with high structural integrity.

Researchers at Canada's McGill University recently reported two separate studies focused on the development of ultra-thin materials based on graphene oxide films, that can move, fold, and reshape themselves, opening new possibilities for soft robotics and adaptive devices. 

Origami structures made by GO films. Image from: Advanced Science

These materials are designed to behave like animated origami, allowing flat sheets to transform into structures that walk, twist, flip, and sense motion. The goal was to overcome long-standing limitations that have kept graphene oxide-based actuators from real-world use - such as brittleness, mass production challenges and complications in generating complex or programmable motion, the team explained. 

Monash Health and Monash University have received a $100,000 research grant from the Love Your Sister Foundation, through the Monash Health Foundation, to develop a graphene oxide (GO)-based biosensor for early cancer detection using circulating tumor DNA (ctDNA). The GO-ctDNA project is a large interdisciplinary collaboration spanning oncology, engineering, nanofabrication and structural biology across Monash Health, Monash University and national research facilities.

“This project represents a perfect convergence of engineering innovation and clinical need,” said Dr. Gwo Yaw Ho, Head of the Cancer Immunology Laboratory within the School of Clinical Sciences at Monash Health, Monash University. “If successful, our GO-ctDNA biosensor could revolutionize early cancer diagnostics by offering a simple, non-invasive blood test that detects cancer mutations with unprecedented sensitivity, potentially even before symptoms appear.”

Researchers at Sungkyunkwan University (SKKU), Hong Kong University of Science and Technology (HKUST) and Jeonbuk University have developed a graphene oxide–wrapped hybrid electrode platform that allows real-time, label-free monitoring of dopamine activity from living neuronal cells and brain organoids. The innovation, named SIDNEY (Smart Interfacial Dopamine-sensing platform for NEurons and organoid physiologY), addresses a long-standing challenge in neuroscience: how to measure functional maturation of stem-cell-derived dopaminergic neurons without destroying the sample.

Built around a hierarchical nanostructure of vertically aligned gold nanopillars adorned with smaller gold nanoparticles and encased in a thin graphene oxide layer, SIDNEY forms a high-conductivity, high-selectivity interface that supports long-term cell culture and differentiation. The graphene oxide coating plays a crucial role - its aromatic carbon rings engage in π–π stacking while negatively charged carboxyl groups attract dopamine’s positively charged amine moiety, ensuring selective capture and efficient electron transfer.

Researchers from National Taiwan University recently investigated the use of graphene oxide (GO) within a multifunctional nanocomposite for removing veterinary antibiotics - including sulfamethoxazole, oxytetracycline, and enrofloxacin - from livestock wastewater. The team created a nanocomposite that removes 95% of these antibiotics from water, providing a sustainable tool against drug pollution and antimicrobial resistance.

Image credit: Chemical Engineering Journal

The hybrid nanocomposite merges two clean-up strategies - adsorption and photocatalysis - into a single system. By integrating graphene oxide, biochar, and titanium dioxide (TiO₂), the researchers produced a porous, high-surface-area material that first attracts antibiotics and then breaks them down under ultraviolet light.

Argo Graphene Solutions has announced it has signed a working relationship agreement with Ceylon Graphene Technologies, a manufacturer of high-grade graphene oxide. In July 2025, Argo Graphene Solutions announced a purchase agreement  for one metric tonne of graphene oxide paste with Ceylon Graphene Technologies.

The new agreement stipulates that Ceylon will supply regular shipments of high-grade graphene oxide paste (20% Graphene Oxide or better) to Argo. Argo will, in turn, mix the high-grade concentrate paste to the required dispersions as per Ceylon's directive- to render it suitable for use in concrete, cement and asphalt applications. Argo will integrate this liquid dispersion amongst its planned North American distribution network with a plan for potential global expansion. The agreement establishes a minimum order volume of 1000 kilograms. Argo has committed to scaling its purchases to a minimum of 4000 kilograms of high-grade graphene oxide paste over the term of the agreement.

Researchers at King’s College London have developed a new approach to characterize graphene-based materials (GBMs), including graphene oxide and graphene, based on surface interactions with a series of probe molecules.

The team at King’s College London designed the new ‘interactional fingerprinting’ method that creates a unique identity of individual samples. By mimicking humans’ sense of taste and smell, the method can create a qualitative snapshot of the material without relying on inaccessible gold-standard measurement machinery manned by teams of specialists. It is said to be more simple and low-cost to perform. 

Argo Graphene Solutions Corp. has announced a purchase order with Ceylon Graphene Technologies of Sri Lanka for one metric tonne of graphene oxide paste (approximately 20% pure graphene oxide).

The purchase order includes 1,000 kg of graphene oxide paste, which is expected to yield approximately 50 tons of liquid dispersion for use as a direct additive in concrete. The paste will be packaged and shipped to Argo’s mixing facility in Kenner, Louisiana, for final product preparation and distribution. This agreement marks a step toward establishing a long-term relationship with Ceylon Graphene to meet the growing global demand for high-purity graphene in the concrete, cement, and asphalt sectors.