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 at Sweden's Umeå University, Lund University and Denmark's Aarhus University have reported a new way to synthesize graphene oxide, which has significantly fewer defects compared to materials produced by the most common method. To date, graphene oxide of similarly good quality could only be synthesized by using a rather dangerous method involving extremely toxic fuming nitric acid.
Graphene oxide is often used to produce graphene by removing oxygen. However, if there are holes in graphene oxide, there will also be holes after it is converted to graphene. Therefore, the quality of the graphene oxide is very important. Umeå University's Alexandr Talyzin and his research group have now addressed the issue of how to safely make good graphene oxide.
Researchers at the University of Manchester, University of Edinburgh, ICN2, RIVM and the University of the Highlands and Islands have tested the safety and health implications of graphene, revealing that it has the potential to be used without risk to human health.
The study has shown that the use of graphene without harm to the human body is possible, through the carefully controlled inhalation of graphene, shown to have no short-term adverse effects on cardiovascular function.
Researchers at Australia's RMIT University and University of Melbourne have investigated the effectiveness of graphene oxide (GO) sheets in enhancing the compressive strength of 3D-printed cementitious mortar.
They added graphene oxide to the cement used as a binder in 3D-printed concrete. After experimenting with different amounts, it was found that when graphene oxide was added at a dosage of 0.015% the weight of the cement, the resulting concrete exhibited better inter-layer bonding. This boost produced a 10% increase in overall strength.
Researchers at the U.S. Army Engineer Research and Development Center (ERDC) are developing a water treatment system based on a mix of graphene oxide and a byproduct made from shrimp shells. Recently, ERDC's graphene research attracted the attention of NASA, leading to a collaboration with the agency to investigate the use of novel graphene materials as high-capacity absorbents for the removal of spacecraft water contaminants.
Graphene could significantly reduce the need for resupply and component sparing in space missions, potentially enabling crewed missions to deeper regions of space. Graphene-enhanced water treatment systems may one day be used to help extend future space missions and lead to safer intergalactic explorations.
Researchers at the Indian Institute of Technology (IIT) Guwahati have developed cost-effective experiments for modifying graphene oxide (GO) that can be used by other academic institutions to train personnel needed for cutting-edge projects in semiconductors, nanoelectronics, healthcare and quantum technologies.
A team led by Rajiv K Kar, assistant professor, at the Jyoti and Bhupat Mehta School of Health Sciences and Technology in IIT-Guwahati, made these discoveries regarding the use of modified graphene oxide for biomedical applications, according to a recent announcement.
Researchers from the Indian Institute of Technology Madras (IIT Madras) and Tel Aviv University in Israel, have developed a graphene oxide-doped silica aerogel adsorbent that can remove trace pollutants from wastewater.
This graphene-modified silica aerogel reportedly removes over 76% of trace pollutants (PPM level) in continuous flow conditions, offering a sustainable path for large-scale water purification. The research team is dedicated to enhancing these results for large-scale applications.
Researchers at the University of Pennsylvania have fabricated meter-long composite fibers combining graphene oxide (GO) nanosheets with flexible, conductive polymers that can achieve mechanical strength, toughness, and actuation that surpasses biological muscles.
The team wet-spin a mixture of GO nanosheets and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT: PSS) into a composite fiber in which the flexible, conductive polymer is embedded in between aligned, closely-packed nanosheets. The addition of a depleting agent, polyethylene glycol (PEG), improves toughness and elasticity, while chemical reduction of GO to rGO increases electrical conductivity. Finally, the composite fibers are plied with nylon yarns to create a hierarchical composite actuator with capabilities better than typical biological muscles (75 J/kg work capacity and 924 W/kg power density).
A team of researchers, led by the University of Wisconsin-Milwaukee, recently developed a path to mass-manufacture high-performance graphene sensors that can detect heavy metals and bacteria in flowing tap water. This advance could bring down the cost of such sensors to just US $1 each, allowing people to test their drinking water for toxins at home.
The sensors have to be extraordinarily sensitive to catch the minute concentrations of toxins that can cause harm. For example, the U.S. Food and Drug Administration states that bottled water must have a lead concentration of no more than 5 parts per billion. Today, detecting parts-per-billion or even parts-per-trillion concentrations of heavy metals, bacteria, and other toxins is only possible by analyzing water samples in the laboratory, says Junhong Chen, a professor of molecular engineering at the University of Chicago and the lead water strategist at Argonne National Laboratory. But his group has developed a sensor with a graphene field-effect transistor (FET) that can detect toxins at those low levels within seconds.
Researchers from Qatar University (QU), Maimoona Mohamed and Nada Yahya Deyab, along with their supervisor Dr. Shabi Abbas Zaidi, have made progress in addressing the challenge of oil-water separation.
Their research focuses on developing a novel material for efficient oil recovery from oil-water mixtures. By modifying polyurethane (PU) sponges and cotton with reduced graphene oxide (rGO), they have achieved promising results in terms of hydrophobicity, oil-absorption efficacy, reusability, and cost-effectiveness, offering a promising solution to address the issue of water and soil pollution caused by oil spills.
Today we published a new edition of our Graphene Oxide Market Report, with all the latest information, including both new research activities. 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.