Successful development of the latest layered catal

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Successful development of new layered catalytic fire-resistant paper

release date: Source: Chinese Academy of Sciences station editor: Yu Jia browse times: 6092 copyright and disclaimer

core tip: Recently, Zhu Yingjie, a researcher at Shanghai Institute of silicate, Chinese Academy of Sciences, and Xiong Zhichao, an assistant researcher, based on the research work of new inorganic fire-resistant paper, in aqueous solution at room temperature, Through in-situ growth of gold nanoparticles on ultra long hydroxyapatite nanowires, a new layered catalytic refractory paper with good flexibility was successfully developed

[China Packaging News] catalysts are widely used in chemical industry and industrial production, and play an extremely important role in modern chemical industry. Nano catalysts have attracted extensive interest and attention in recent years because of their small size, large specific surface area, high surface activity and excellent catalytic performance. However, one of the difficulties is that in the liquid-phase catalytic reaction system, when the catalytic reaction is completed, the nano catalyst powder is difficult to be separated from the liquid-phase reaction system, which makes it difficult to recycle the catalyst and the recovery cost is high. In addition, catalyst nanoparticles are prone to serious agglomeration in the liquid-phase reaction system, resulting in a significant reduction in the catalytic performance of the catalyst

recently, the Shanghai Silicate Research Institute of the Chinese Academy of Sciences paid attention to whether the screws and nuts at each part are loose and rusty, and asked whether there may be rust, corrosion and other phenomena. On the basis of the research work of the new inorganic fire-resistant paper, zhuyingjie, a researcher of the Institute, and xiongzhichao, an assistant researcher, grew gold nanoparticles in situ on the ultra long nanowires of hydroxyapatite in an aqueous solution at room temperature, A new type of layered catalytic fire-resistant paper with good flexibility was successfully developed. The loading amount of nano gold catalyst in the catalytic refractory paper is controllable and evenly dispersed, which can effectively prevent the agglomeration of gold nanoparticles and improve the catalytic activity. In addition, in the new catalytic fire-resistant paper, hydroxyapatite ultra long nanowires form nano porous complex structure and layered structure through self-assembly, which can greatly improve the contact opportunity with nano catalyst when the reaction flow passes through in the catalytic reaction, and can significantly improve the catalytic efficiency. The new catalytic fire-resistant paper is easy to realize efficient separation and recycling from the liquid-phase reaction system. After the catalytic reaction is completed, as long as the catalytic fire-resistant paper is taken out of the solution, the recovery and reuse of nano catalysts can be realized conveniently and quickly, and the cost can be greatly reduced. More importantly, the new catalytic fire-resistant paper has excellent high temperature resistance and fire resistance, and can remain intact even after burning in the fire for a long time. The new catalytic refractory paper has good high-temperature catalytic stability, and can still maintain high catalytic activity after high-temperature treatment. In addition, the new catalytic fire-resistant paper can be recycled for many times and used for a long time, and still can maintain high catalytic activity. The relevant research results were published in the Journal of Materials Chemistry A (65762 – 5773 (2018)) of the British chemical society

the new layered catalytic refractory paper shows excellent catalytic performance in continuous flow catalytic reaction. Experiments show that at room temperature, as long as the aqueous solution containing 4-nitrophenol and sodium borohydride is dumped on the new catalytic fire-resistant paper, it flows through the catalytic fire-resistant paper as quickly as the aqueous solution is filtered, and the catalytic reaction is completed. 4-nitrophenol is transformed into 4-amino phenol. The catalytic reaction is fast and the catalytic efficiency is very high (-- 100%). Similarly, with continuous flow catalytic reaction, the new catalytic fire-resistant paper can also effectively and rapidly degrade a variety of organic dyes such as rhodamine B and methyl orange. As long as the aqueous solution polluted by organic dyes is poured on the catalytic fire-resistant paper and flows quickly, the continuous, efficient and rapid purification of sewage can be realized. In addition, the research team also achieved the amplification of the 10 upgrade reactor of hydroxyapatite ultra long nanowires and the preparation of large-size new layered structure catalytic fire-resistant paper. The prepared large-size catalytic fire-resistant paper has good uniformity and repeatable high catalytic activity

Maintenance of notched broaching machine for hydroxyl phosphorus impact samples limestone ultra long nanowire based new inorganic refractory paper is an excellent high temperature resistant catalyst carrier, which can effectively load, evenly disperse and tightly fix a variety of nano catalysts. The prepared new layered structure catalytic fire-resistant paper with a building area of 1026000 square meters has excellent high-temperature resistance, which is especially suitable for a variety of liquid-phase and gas-phase catalytic reactions at high temperatures, and can be recycled for many times and used for a long time. It has a good application prospect in the fields of Chemical Engineering, industrial production, industrial exhaust gas purification, automobile exhaust gas purification, sewage treatment and so on

this research work was supported by the National Natural Science Foundation of China and Shanghai Science and Technology Commission

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