What is Graphene Oxide?
Graphene is a material made of carbon atoms that are bonded together in a repeating pattern of hexagons. Graphene is so thin that it is considered two dimensional. Graphene is considered to be the strongest material in the world, as well as one of the most conductive to electricity and heat. Graphene has endless potential applications, in almost every industry (like electronics, medicine, aviation and much more).
As graphene is expensive and relatively hard to produce, great efforts are made to find effective yet inexpensive ways to make and use graphene derivatives or related materials. Graphene oxide (GO) is one of those materials - it is a single-atomic layered material, made by the powerful oxidation of graphite, which is cheap and abundant. Graphene oxide is an oxidized form of graphene, laced with oxygen-containing groups. It is considered easy to process since it is dispersible in water (and other solvents), and it can even be used to make graphene. Graphene oxide is not a good conductor, but processes exist to augment its properties. It is commonly sold in powder form, dispersed, or as a coating on substrates.
Graphene oxide is synthesized using four basic methods: Staudenmaier, Hofmann, Brodie and Hummers. Many variations of these methods exist, with improvements constantly being explored to achieve better results and cheaper processes. The effectiveness of an oxidation process is often evaluated by the carbon/oxygen ratios of the graphene oxide.
Graphene oxide uses
Graphene Oxide films can be deposited on essentially any substrate, and later converted into a conductor. This is why GO is especially fit for use in the production of transparent conductive films, like the ones used for flexible electronics, solar cells, chemical sensors and more. GO is even studied as a tin-oxide (ITO) replacement in batteries and touch screens.
Graphene Oxide has a high surface area, and so it can be fit for use as electrode material for batteries, capacitors and solar cells. Graphene Oxide is cheaper and easier to manufacture than graphene, and so may enter mass production and use sooner.
GO can easily be mixed with different polymers and other materials, and enhance properties of composite materials like tensile strength, elasticity, conductivity and more. In solid form, Graphene Oxide flakes attach one to another to form thin and stable flat structures that can be folded, wrinkled, and stretched. Such Graphene Oxide structures can be used for applications like hydrogen storage, ion conductors and nanofiltration membranes.
Graphene oxide is fluorescent, which makes it especially appropriate for various medical applications. bio-sensing and disease detection, drug-carriers and antibacterial materials are just some of the possibilities GO holds for the biomedical field.
Buy Graphene Oxide
Graphene oxide is relatively affordable and easy to find, with many companies that sell it. It does, however, get confusing since different companies offer products that vary in quality, price, form and more - making the choice of a specific product challenging. If you are interested in buying GO, contact Graphene-Info for advisement on the right GO for your exact needs!
The latest graphene oxide news:
Researchers from Deakin University's Institute for Frontier Materials (IFM) aim to harness the ocean's potential for renewable and clean energy. In a recent study, they demonstrated how a two-dimensional (2D) nanomaterial membrane technology can improve blue energy harvesting processes. Blue energy harvesting is renewable energy that uses the salt content difference between river water and seawater to generate electricity.
"Ocean energy is made up of five forms—tidal, water waves, ocean currents, temperature gradients and salinity gradient energy, offering a potential alternative, limitless energy resource," says Associate Professor Weiwei Lei, who is leading the sustainable energy generation project at IFM. "Therefore, harvesting ocean energy through artificial devices has attracted tremendous interest. In particular, salinity gradient energy, also called 'osmotic energy' or 'blue energy,' provides significant promise for the development of renewable energy. It has a potential 1 TW energy (8500 TW h in a year), which exceeds the sum of hydraulic, nuclear, wind and solar energy in 2015. With the development of nanotechnology and 2D nanomaterials, novel 2D nanomaterials' membranes with nanopores and nanochannels were designed for blue energy harvesting. However, the energy harvesting efficiency of these membranes is still too low to meet the demands of practical applications due to their high internal resistance and low selectivity of ions. New advanced 2D nanomaterial membranes with novel and robust properties will solve this problem, which is in high demand now."
Researchers from China's Tsinghua University have constructed highly aligned graphene oxide (GO) nanochannels for sustainable energy production using a freeze-casting process. The new method could address an issue that impedes the generation of electricity from natural water flow through engineered nanochannels, which could become a viable way to cater to the fast-growing renewable power needs.
Large-scale nanochannel integration and the multi-parameter coupling restrictive influence on electric generation currently remain big challenges for macroscale applications, but this novel design encourages spontaneous absorption and directed transfer of water within the nanochannels to generate clean electricity.
Researchers from Tsinghua University recently developed a self-powered sensor that can monitor and detect multiple environmental stimuli simultaneously and demonstrated how it can “translate” sign language into audio.
The sensor was made from graphene oxide and powered internally by a moist electric generator called MEG, which contains a membrane that spontaneously absorbs water from the air. When water adheres to the surface, this results in a higher concentration of hydrogen ions at the top of the membrane and a potential difference between its two electrodes.
Graphene Composites (GC) and William Blythe have announced a partnership in William Blythe’s supply of graphene oxide for use in GC Halo, a unique coating for air filters that destroys viruses, bacteria and mold on contact.
GC Halo is a nanoparticle ink formulation, that destroys pathogens by forming a ‘trap and kill’ layer on air filters and has been independently verified to significantly reduce SARS-CoV-2 coronavirus in the air. Fast-acting, safe and more than 99% effective against SARS-CoV-2 coronavirus, Influenza, bacteria and mold, independent tests and certifications reportedly prove GC Halo’s capabilities as a filter coating.
Ni-Co layered double hydroxides (LDH) are seen as promising materials for pseudocapacitor electrodes. Researchers from Chonnam National University and Korea Institute of Science and Technology (KIST) recently conducted a study that focused on the use of graphene oxide (GO) and single-walled carbon nanohorns (SWCNHs) hybrid as an efficient platform for LDH coating materials for supercapacitor electrodes.
The team explained that the novel Ni-Co LDH and GO/SWCNHs composite-based supercapacitor electrode material could be a potential choice for pseudocapacitor applications thanks to its superior electrochemical properties and ease of production, which is ideal for various commercial and industrial applications.
Researchers from the National Institute for Cryogenics and Isotopic Technologies ICSI-Rm in Romania have applied microwave processes to iodine doping and reduction of graphene oxide, to produce functionalized fuel cell organic reduction reaction electrocatalysts. The team chose to utilize microwave-assisted processes because of their many benefits, like reduced energy, time, and cost demands.
The process developed by the team relies on a faster, simpler, more economical, and efficient protocol under atmospheric pressure conditions. Under mild conditions, the microwave-assisted process highlighted in the research synthesizes a canvas-like iodine/reduced graphene oxide structure from graphene oxide. Thus, a low-cost, efficient alternative to platinum-based catalysts has been developed.
Researchers from India's Haldia Institute of Technology have created a gravity filter using graphene oxide (GO), meant for purifying river water. Using alternative water resources like river water can help address the rising shortage of freshwater resources worldwide. Therefore, the deployment of cost-effective water filtration technologies is imperative for the desalination of river water and purification of polluted water.
Filtration using a gravity filter is a highly popular method for water purification. A gravity filter is a type of pressure filter wherein water passes through the filtering component on the influent side at atmospheric pressure and the whole system is driven by the force of gravity instead of electricity. A major benefit of gravity filters is that they are free from moving components, therefore require less filter maintenance. Another significant advantage of using a gravity-based water filtration system is that the system does not need a power supply. The main drawback, on the other hand, is the low output of purified water. The limitations of filtering technology imply that no one filtration material can remove all pollutants present in water.
Today we published a new edition of our Graphene Oxide Market Report, with all the latest information, including both new research activities and updates from companies. Our market report is a comprehensive guide to graphene oxide (and r-GO) materials and their promising applications in energy storage, composite materials, bio-medical, water treatment and more.
Reading this report, you'll learn all about:
- The difference between graphene oxide and graphene
- Graphene oxide properties
- Possible applications for graphene oxide
- Reduction of graphene oxide to r-GO
The report package also provides:
- A list of prominent GO research activities
- A list of all graphene oxide developers and their products
- Datasheets for over 20 different GO materials
- Free updates for a year
This Graphene Oxide market report provides a great introduction to graphene oxide materials and applications, and covers everything you need to know about GO materials on the market. This is a great guide for anyone interested in applying graphene oxide in their products.
Researchers from Pakistan have reported a green approach to the synthesis of graphene oxide/silver nanoparticle nanocomposite.
Metallic nanoparticles (NPs) have various benefits in the field of electrochemistry. Because of their small size, nanoparticles may enhance the contact area of the electrode in use. Furthermore, metallic nanoparticles may boost the rate of mass transfer and provide quick electron transference, increasing the sensitivities of the used electrodes. Silver nanoparticles (AgNPs) are relatively low cost and have distinct physical and chemical characteristics that make them helpful in several optical, chemical, and catalytic functions. Nanoscale composites of metallic nanoparticles and graphene oxide have promising applications in energy storage, supercapacitors, and electronics.
UK-based graphene Oxide developer William Blythe announced that as the company enjoys increasing demand for its graphene materials, it has scaled up its production from lab-scale to 50-tonne capacity.
William Blythe started to develop its graphene technologies in 2016, and started to supply small quantities of the material in 2016. The company since has been working with world-leading organizations to advance its technology and applications research.