Shanghai Silicate Institute developed a new layered structure catalytic refractory paper

Researcher Zhu Yingjie and Assistant Researcher Xiong Zhichao of the Shanghai Institute of Ceramics, Chinese Academy of Sciences, etc., based on the research work of new inorganic refractory paper, in situ in an aqueous solution at room temperature, by in situ growth on hydroxyapatite ultra-long nanowires. Gold nanoparticles have successfully developed a novel layered structure catalytic refractory paper with good flexibility. The loading amount of the nano gold catalyst in the catalytic refractory paper is controllable and uniform, which can effectively prevent the agglomeration of the gold nanoparticles and improve the catalytic activity.

Catalysts are widely used in chemical, chemical and industrial production, and occupy an extremely important position in the modern chemical industry. Nanocatalysts have small size, large specific surface area, high surface activity, and excellent catalytic performance, which have attracted wide interest and attention in recent years. However, one of the problems is that in the liquid phase catalytic reaction system, when the catalytic reaction is completed, the nanocatalyst powder is difficult to separate from the liquid phase reaction system, making the recycling of the catalyst difficult, and the recovery cost is high. In addition, in the liquid phase reaction system, the catalyst nanoparticles are prone to severe agglomeration, resulting in a significant decrease in the catalytic performance of the catalyst.

In the novel catalytic refractory paper, the hydroxyapatite ultra-long nanowires form a nanoporous network structure and a layered structure by self-assembly, which can greatly improve the contact chance of the reactants flowing through the nanocatalyst during the catalytic reaction, and can be significantly improved. Catalytic efficiency. The novel catalytic refractory paper can easily realize high-efficiency separation and recycling from the liquid phase reaction system. After the catalytic reaction is completed, as long as the catalytic refractory paper is taken out from the solution, the recovery and reuse of the nanocatalyst can be conveniently and quickly realized, which can greatly cut costs. More importantly, the new catalytic refractory paper has excellent high temperature and fire resistance and can remain intact even after burning for a long time in a fire. The new catalytic refractory paper has good high temperature catalytic stability and can maintain high catalytic activity after high temperature treatment. In addition, the new catalytic refractory paper can be recycled many times and used for a long time, and still maintain high catalytic activity.

The hydroxyapatite ultra-long nanowire-based new inorganic refractory paper is an excellent high-temperature resistant catalyst carrier, which can achieve high-efficiency loading, uniform dispersion and tight fixation of various nano-catalysts. The prepared novel layered catalytic refractory paper has excellent high temperature resistance, and is particularly suitable for various liquid phase and gas phase catalytic reactions at high temperatures, and can be recycled and used for a long time in chemical engineering, industrial production, industry. The fields of exhaust gas purification, automobile exhaust gas purification, sewage treatment, etc. have good application prospects.