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High-temperature thermal shock and material modification: Associate Professor Li Qiang's team used the thermal shock method to achieve efficient preparation of chromium oxide (CrOx) nanocatalysts through rapid heating and cooling, significantly increasing the proportion of unsaturated coordination centers (such as CrO₅ and CrO₄) on its surface. The Flash Joule Heating Machine (FJH) technology can also quickly heat the material to a high temperature, triggering the reorganization of the internal structure of the material and the formation of defects, and achieving precise control of the material's microstructure. Both use the violent reaction conditions brought about by high-temperature thermal shock to promote efficient modification of the target material.
Rapid heating and performance optimization: The thermal shock method achieves efficient preparation of catalysts through rapid heating, optimizes the unsaturated coordination structure of the catalyst, and significantly improves the catalytic performance. FJH technology is also commonly used for rapid heating and performance optimization in the preparation of other materials. For example, in the preparation of carbon-based materials such as graphene, the defect density and electronic structure of the material can be regulated by rapid heating, thereby optimizing its conductivity and chemical activity.
High efficiency and low cost: The thermal shock method can complete the preparation of catalysts in a short time and is highly efficient. FJH technology also greatly shortens the time of material preparation, improves production efficiency and reduces production costs with its characteristics of rapid heating and cooling. The combination of the two can further improve the efficiency and performance of catalyst preparation, reduce production costs, and provide technical support for large-scale production of high-performance catalysts.
Environmental friendliness: The thermal shock method avoids the high energy consumption and environmental pollution problems in the traditional roasting method. FJH technology does not require the use of solvents or reaction gases during the material synthesis process and has low energy consumption. The combination of the two helps to achieve a greener and more sustainable catalyst preparation process, which meets the current requirements of environmental protection and sustainable development.
Further optimization of catalyst performance: FJH technology can be applied to the subsequent treatment of CrOx catalysts prepared by thermal shock method. Through further rapid heat treatment, the crystal structure and defect distribution of the catalyst can be optimized to improve its catalytic activity and stability. For example, more uniform defect distribution and stronger metal-support interaction can be achieved through FJH technology, which enhances the catalyst's anti-sintering ability and long-term stability.
Development of new catalysts: Combine the rapid synthesis capability of FJH technology and the structural regulation advantage of thermal shock method to explore and develop new catalysts. For example, try to use FJH technology to quickly heat treat and optimize the structure of other types of metal oxides or composite materials, and then use thermal shock method for regeneration to achieve higher performance and better application effect.
Optimization and standardization of process parameters: In-depth study of the synergistic mechanism of FJH technology and thermal shock method in the catalyst preparation process, optimize process parameters such as heating temperature, heating time, current density, etc. Establish a standardized process flow to ensure the stability and consistency of catalyst performance, and provide reliable technical support for the commercial production and application of catalysts.
Electrospinning Nanofibers Article Source:
https://doi.org/10.1021/acs.chemmater.4c02260
