Graphene Aerogel Applications
2017-12-18 15:53:19 From: Tradematt-Aerogel
The realization of three-dimensional structure of graphene Aerogel also has potential applications in various directions such as water treatment, catalyst, heat insulation, micro-control driving, electrical devices and sensors. But almost no real industrial level, the biggest reason is too expensive.
Graphene Aerogel has very good lipophilicity, and because of its superelasticity and porosity, it can be used in oceanic oil processing and the like. The ultra-low density gives it excellent performance up to a few hundred grams of mono-adsorbed oil, and the subsequent continuation of the entire Aerogel structure, whether it is by extrusion or by combustion, remains intact for sustainable use.
Professor Feng Xinliang of Shanghai Jiaotong University, through loading graphene Aerogel with ferrosoferric oxide nanoparticles, finally found that the performance of the Aerogel loaded with ferriferrous oxide nanoparticles is better than pure ferroferric oxide nanoparticles, This is actually predictable (JACS, 2012, 134: 9082-9085). Because of the porosity (> 99%) and the large comparative area of the Aerogel material, the catalyst actually participating in the reaction has a larger contact area with the reactants than the pure nanoparticles when the catalyst particles are uniformly supported on the Aerogel. The effect of the Aerogel is equivalent to the change of the nanoparticles from stack to dispersion. That Aerogel can be a good catalyst as a carrier or a fixative.
Chen Wei, Changchun Institute of Applied Chemistry, has proposed the use of SnO2 particles based on a graphene Aerogel carrier for NO2 gas monitoring in air (Analytical Chemistry, 2015, 87, 1638-1645). The principle is as follows: SnO2 (semiconducting) increases its electrical conductivity in a reducing gas atmosphere and its conductivity decreases in an oxidizing gas atmosphere, but at present some disadvantages of SnO2 limit its applications such as poor conductivity at room temperature, SnO2-based gas sensors High temperature (H2: 170-200 ℃, CO: 200 ℃), the synthesis of SnO2 easy to agglomerate lead to lower performance and so on. The use of graphene Aerogel as a carrier, and then loaded on the SnO2 particles almost perfect solution to these problems, the first conductivity was greatly improved, and secondly to prevent the reunion, and even the working temperature dropped to 50 ℃, making room temperature Under the application as possible. This is also the use of graphene Aerogel has good electrical conductivity.