Graphene can solve the five biggest problems of the world

In September 2015, world leaders gathered at the historic UN summit to adopt sustainable development goals (SDG). Seventeen of these ambitious goals and indicators will help guide and coordinate governments and international organizations to solve global problems. For example, SDG 3 provides "ensuring a healthy lifestyle and affordable well-being for all people at any age". Others include access to clean water, reducing the effects of climate change and affordable health.

If you think these goals are difficult to achieve, you are right. In all seventeen categories there are problems that will not allow them to happen before the designated date in 2030. However, in combination with progress in the social and political arena, progress in science and technology can become a key accelerator of this process.

Let's bring all the goals of the SDG:

  1. The universal elimination of poverty in all its forms
  2. Elimination of hunger, security and nutrition and promote sustainable agricultural development
  3. Promoting healthy lifestyles and promoting well-being for all at any age
  4. Providing an inclusive and fair quality education 19659005] Ensuring gender equality and empowering all women and girls
  5. Ensuring the availability and rational use of water and sanitation for all
  6. Providing access to affordable, reliable, sustainable and modern energy sources for all
  7. Promoting sustained, inclusive and sustainable economic growth, full and productive employment and decent work for all
  8. Building a strong infrastructure Promoting inclusive and sustainable industrialization and innovation
  9. Reducing inequalities within and between countries
  10. Ensuring openness, security, resilience and sustainability of cities and human settlements
  11. Ensuring rational consumption and production patterns
  12. Adopting Urgent action to combat climate change and its consequences
  13. Conservation and management of oceans, seas and marine resources for sustainable development
  14. Protection, restoration conservation and sustainable use of forests, sustainable forest management, combating desertification, cessation and reversal of land degradation and halting the loss of biological diversity
  15. Promoting the building of peaceful and open societies for sustainable development, ensuring access to justice for all and the creation of effective, accountable and participatory institutions at all levels
  16. Strengthening the means for achieving sustainable development and enhancing the The mechanisms of the global partnership for sustainable development

Is it difficult? Maybe. But scientists seem to have an answer. Just one word: graphene. A futuristic material with a growing array of potential applications.

Graphene consists of densely connected carbon atoms lined up in a lattice one atom thick. This makes it the thinnest substance in the world, which is 200 times stronger than steel, flexible, stretchable, self-healing, transparent, conductive and even superconducting. A square meter of graphene weighing only 0.0077 grams can withstand four kilograms of the load. This is an amazing material, which, however, does not surprise scientists and technical experts.

The headlines that advertise graphene as a miracle material have appeared regularly over the past ten years, and the transition from promise to reality has been slightly delayed. But this is logical: it takes time for the new material to find itself in all spheres of life. Meanwhile, these years of graphene research have given us a long list of reasons not to forget about it.

Ever since graphene was first identified in 2004 at the University of Manchester – and this work earned the Nobel Prize in 2010 – scientists around the world have found new ways of using and, importantly, creating graphene. One of the main factors restraining the widespread use of graphene was the large-scale production of cheap graphene. Fortunately, seven-league steps were taken in this direction.

Last year, for example, a group from Kansas State University used explosions to synthesize large quantities of graphene. Its method is simple: fill the chamber with acetylene or ethylene and oxygen. Use the car's spark plug to detonate. Collect the resulting graphene. Acetylene and ethylene consist of carbon and hydrogen, and when hydrogen is absorbed during the explosion, carbon freely binds to itself, forming graphene. This method is effective, because all that is required is one spark.

Whether this method can start the graphene revolution, as some believe, remains to be seen. What is obvious is that together with the onset of this revolution many problems will be solved. For example …

Pure Water

The sixth goal outlined in the SDG is listed as "to ensure accessibility and sustainable water management and sanitation for all." The UN estimates that "water scarcity affects more than 40% of the world's population and is projected to grow."

Graphene-based filters could well be the solution. Jiro Abraham of the University of Manchester helped develop scalable sieves from graphene oxide to filter seawater. He argues that "the developed membranes are useful not only for desalination, but also for changing the size of pores on an atomic scale, allowing to filter ions according to their size."

In addition, researchers from Monash University and the University of Kentucky have developed graphene filters, which can filter out anything that is larger than one nanometer in size. They say that their filters can be used to filter chemicals, viruses or bacteria in liquids. They can be used to purify water, dairy products or wine, or for the production of pharmaceuticals.

Carbon emissions

The thirteenth objective on the SDG list is devoted to taking "urgent measures to combat climate change and its consequences."

Of course, one of the main culprits of climate change is the excessive amount of carbon dioxide released into the atmosphere. Graphene membranes could capture these emissions.

Scientists from the University of South Carolina and Hanyang University in South Korea independently developed graphene-based filters that can be used to separate unwanted gases from industrial, commercial and residential emissions. Henry Foley of the University of Missouri claimed that these discoveries became "something of the Holy Grail."

With their help, the world could stop the growth of CO 2 in the atmosphere, especially now that we have overcome an important indicator 400,000 ppm.

Health

Many people around the world do not have access to adequate health care, but graphene can turn this matter upside down.

First of all, the high mechanical strength of graphene makes it an ideal material for replacement parts of the body, such as bones, and benefit arya its conductivity it can replace parts of the body which require electric current, such as organs and nerves. In fact, scientists from the University of Michigan are working on the use of 3D printers for nerve printing based on graphene, and this team is developing biocompatible materials using graphene for electricity.

Graphene can also be used to create biomedical sensors for detecting diseases, viruses and other toxins. Since every graphene atom is exposed to it – due to the fact that graphene is one atom thick, – the sensors can be extremely sensitive. Sensors based on graphene oxide could detect toxins at levels 10 times smaller than modern sensors require. They could be placed on or under the skin and provide a vast amount of information to physicians and scientists.

Chinese scientists even created a sensor capable of detecting just one cancer cell. Moreover, scientists at the University of Manchester report that graphene oxide can detect and neutralize cancer stem cells.

Infrastructure

The ninth goal of the SDG is to "build a strong infrastructure, promote inclusive and sustainable industrialization and innovation". Composites reinforced with graphene and other building materials can bring us closer to this goal.

Recent studies have shown that the more graphene is added, the better the composite becomes. This means that graphene can be added to building materials – concrete, aluminum, which will make them stronger and lighter.

Rubber is also improved due to the addition of graphene. A study by Graphene Flagship and its partner Avanzare reports that "graphene enhances the functionality of rubber by combining the electrical conductivity of graphene and mechanical strength with excellent corrosion resistance." From such rubbers, corrosion resistant pipes could be made.

Energy

The seventh task is to provide access to low-cost, reliable, sustainable and modern energy sources for everyone. Because of the ease, conductivity and tensile strength, graphene can make green energy more efficient and cheaper.

For example, graphene composites could be used to create more versatile solar panels. Researchers at the Massachusetts Institute of Technology say that "with the help of graphene it is possible to make flexible, inexpensive and transparent solar cells that can turn almost any surface into a source of electricity." Thanks to graphene composites, it is also possible to create large and light wind turbines.

In addition, graphene is already used to improve traditional lithium-ion batteries, which are commonly used in consumer electronics. Studies of graphene airgels for storing energy and supercapacitors are also being conducted. All this will be needed for large-scale storage of clean energy.

Over the next ten years, graphene will almost certainly find many applications in the real world and will not only help the UN and its participants achieve SDG goals, but will improve everything in our world, from touch screens to MRI devices and transistors.

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