Graphene, the king of the hottest materials, will

2022-09-19
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"King of materials" graphene will create a new miracle

graphene scientist Guilin "argumentative sword", Nobel laureate Constantine Novoselov, academician of the Chinese Academy of Sciences, top experts in graphene research at home and abroad, and dozens of other people attended the 2018 International Conference on the latest development of graphene research to jointly discuss the new progress of graphene research. They believed that "king of materials" graphene would create a new miracle, Constantly refresh people's understanding that science and technology change life

Novoselov: 2D materials will change the world

British scientist Professor Konstantin Novoselov, who won the 2010 Nobel Prize in physics for successfully stripping graphene, introduced the more excellent properties of 2D crystals with detailed data at the conference. He said that there are still many 2D materials in the world, waiting for us to study and discover. We can further expand the range of available two-dimensional materials, and through the heterostructure of van der Waals force, we can really combine different crystals to produce new two-dimensional materials, and help us achieve the functions we want. He said that the application of 2D new materials, including graphene, will change our world in the future

Konstantin Novoselov believed in an interview that graphene will be widely used in the future, especially in devices. In the current research progress, some of them have achieved very good results and hope to be applied in the future. But at present, graphene is still only a "super baby" and is far from growing up. Professor Constantine has made a spot check on the global simoxi production enterprises. No enterprise has more than 60% SP2 hybrid graphene products, and the research road of graphene is still long

Guo Wanlin: the prospect of "water potential" power generation is attractive

now the earth is facing the problem of lack of fresh water and global warming. In fact, warming water is full of energy. The energy contained in water in a place can be as high as 1200 joules on average, which means that two cubic meters of air in a room can contain a huge amount of energy. Guowanlin, an academician of the Chinese Academy of Sciences and professor of Nanjing University of Aeronautics and Astronautics, developed this energy, so his research team tried to evaporate water, and then found that in this process, continuous power generation can be achieved, and a relatively high current intensity can be achieved. In this regard, he first proposed the concept of "water potential", which is a concept corresponding to "photovoltaic". He said that water evaporation on the surface of nanostructured carbon materials can produce a sustainable voltage of 1 volt at room temperature

academician guowanlin's research shows that when graphene is placed on the screen, the water droplets roll on it, and electricity can be generated. The faster the water droplets roll, the greater the electricity generated. On a micron scale film of 2 square centimeters, 1 volt electricity will be generated. As long as the water is not dry and evaporation is generated, power generation can continue all the time. Superimpose this electricity, otherwise the fixture will be damaged; A few volts or 10 volts are OK. Guowanlin's original team prepared a cm sized carbon black film on a quartz sheet. After hydrophilic treatment, it was semi immersed in a beaker containing water. Under normal temperature and pressure, the water evaporated naturally. A voltage of about 1V was generated at both ends of the carbon black film and could be maintained for a long time. In the experiment, four water evaporation power generation devices were connected in series, and the LCD was turned on unexpectedly. He said that in the next few years, everyone can use this technology to charge their own or to generate electricity

Chen Jun: strive to make electric vehicles take off safely

energy has become the top ten difficult problems of mankind in the 21st century. The development of clean energy has become a world consensus, and new energy photoelectric conversion and energy storage technology plays an important role in achieving clean and efficient utilization of energy and social development. In this regard, Chen Jun, academician of the Chinese Academy of Sciences and Dean of the school of chemistry of Nankai University, shared the latest progress in the research on the good electrochemical performance of synthetic inorganic/organic and graphene composites in rechargeable lithium/sodium batteries. He said that graphene has good conductivity, which can solve the problems of poor conductivity and the need to add a lot of conductive materials in batteries, so as to improve the conductivity of electrode materials in batteries and obtain good energy. In addition, graphene, as an active substance in the electrode, can participate in the electrochemical reaction of the electrode, especially its low bulk density, which can effectively improve the specific energy of the battery

he pointed out that at present, new energy vehicles have risen to the national strategy and attracted the attention of the public, but there are still some difficulties to be solved in their research fields, such as mileage, fast charging, production costs and use safety. Although everyone is looking forward to scientists' research and production of electric vehicles that can run 300-500 kilometers with one charge, and can be charged and released quickly, so as to get safe use, how to enhance the conductivity of batteries has always been a difficulty in scientific research. He said that it is most appropriate to describe the battery as "although the sparrow is small, it has five dirty parts", and graphene is a good conductive material. In the future, their research team will pay more attention to the applied research of energy chemistry, so that graphene can make a great contribution in the vast world of energy chemistry. He believes that in the future, the range of electric vehicles will continue to increase, the use will be safer, and electric vehicles will gradually become intelligent. Even graduate students will produce driverless electric vehicles, "flying" electric vehicles and many other high-tech new energy vehicles

Cheng Huiming: he has mastered the new process of preparing high-quality graphene materials

Professor Cheng Huiming, an academician of the Chinese Academy of Sciences, made a report on the preparation of graphene and other two-dimensional materials by exfoliation at this conference, which found methods for how to realize the mass production of graphene and how to develop the potential fields of graphene, and attracted the attention of many experts, scholars and entrepreneurs on the scene

he pointed out that graphene is a very special 2D material, which not only has very excellent properties. It also has excellent flexibility and chemical stability. It has a large surface area, is easy to assemble, and is easy to functionalize. However, at present, the market cost of graphene is relatively high, and there is still great room for improvement in quality, manufacturing equipment, and price

Professor Cheng Huiming's research team has prepared a large number of high-quality graphene materials from natural graphite through intercalation expansion liquid-phase stripping and electrochemical stripping processes, making them widely used in composites, energy storage, conductive inks, etc. He said that we should have not only many metal compounds of two-dimensional materials, but also a series of other materials. For example, some two-dimensional materials such as insulators, some semi metallic or metallic substances are expected to be applied in many fields, including nano electronics, light modulators, sensors, composites, energy storage devices and other potential applications. Therefore, in the research field of graphene and two-dimensional materials, we must develop good processes, and use different two-dimensional materials to design and construct this heterostructure, and we also need to find ways to develop the unique properties of two-dimensional materials, prepare "killer" applications, and make them commercially available in real life

Correa: graphene research in China will create miracles

Antonio Correa, CO chairman of the organizing committee, pointed out that graphene is now a hot topic and the world is in a state of vigorous research. At present, scientists from various countries are applying their research results to the production of products. For example, enterprises such as the United States and Japan are applying graphene to the manufacturing of. However, the research and application of graphene materials need to be further improved. Industrial production is only a part of graphene applications, and more application fields and spaces need to be explored. This is a big topic

he believes that the research of graphene materials has received a lot of support in China, and China has a high enthusiasm for graphene research. Now more and more conferences and seminars on graphene and two-dimensional materials are held in China, setting off a wave of graphene research again and again. Compared with the United States, the research in this area is not so enthusiastic, and the support of the government and Society for graphene research is not as strong as that of China. He believes that China will create an amazing miracle in the field of graphene research

Liu Zhongfan: able to control the size of graphene by 10 microns

Professor Liu Zhongfan, an academician of the Chinese Academy of Sciences, said that his research team had achieved the control of the size of graphene. In his report, he first shared the roll scalable growth technology and instrument, 4-inch single crystal graphene wafer and instrument, rapid growth technology, high carrier mobility doping growth, CVD Growth Technology of ultra clean graphene invented by him and his research team since they entered the graphene research field in 2008. The research progress they made in the "graphene journey" made a lot of gains for the on-site guests

Professor Liu Zhongfan said that if you want to obtain large-scale preparation of high-quality graphene, you must control a series of variables. He said that because everyone is facing the problem of how to control the size of graphene, his team has done relevant research and Exploration on this problem, and was able to control the size to 10 microns in 2009. Now they can achieve the effect of mass production by making its size smaller, and they can also use new technologies to achieve very high-speed growth of high-quality graphene, and improving the growth rate means reducing the cost of graphene

He Guoqiang: Guangxi released China's first series of local standards for graphene

Professor He Guoqiang pointed out in an interview that the research progress of graphene in Guangxi in recent years is gratifying. In 2016, an international advanced graphene research and testing platform was built and completed. Advanced instruments include spherical aberration correction transmission electron microscope, scanning electron microscope, atomic force microscope, Raman spectrometer, X-ray diffractometer, X-ray photoelectron spectroscopy, specific surface tester, etc, Guangxi graphene Research Institute was established to provide a good platform and conditions for the frontier research of graphene in Guangxi with a production time of 1 minute for 2mm thick plates

in December 2016, Guangxi took the lead in releasing China's first series of local standards for graphene. Professors Shen Peikang and He Guoqiang of Guangxi University actively participated in the formulation of national and international standards for graphene

some graphene research in Guangxi has reached the international leading level, especially in basic research. A controllable preparation method of three-dimensional graphene has been developed. Graphene with three-dimensional structure has been prepared by in-situ high-temperature catalysis on the atomic and ionic micro scales. The three-dimensional structure contains both SP2 and SP3 bonds. Its conductivity, electrochemistry, specific surface area and porosity are excellent, and it has excellent performance in electrocatalysis, electrochemical energy storage The fields of electric conduction and heat conduction have broad application prospects. At the same time, a new electrochemical preparation methodology and mechanism of graphene quantum dots have been developed. The defects and size of graphene quantum dots can be adjusted, and they can be doped with ultra-high heteroatoms and surface modified. The doping amount is more than 30%. They have broad application prospects in the fields of electrocatalysis, photoluminescence, targeted therapy and so on. Relevant research results have been published in international journals advanced materials, ACS catalysis, and Journal of material

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