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Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.

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Updated: Jul 5, 2025

A Continuous-flow Photocatalytic Reactor for the Precisely Controlled Deposition of Metallic Nanoparticles

A Continuous-flow Photocatalytic Reactor for the Precisely Controlled Deposition of Metallic Nanoparticles

Published on: April 10, 2019

铜 (I) 功能化COF包装床反应堆的加速扩散用于高效的连续流催化.

Shizhao Wang¹, Xiaocong Xia¹, Qi Chen¹

¹Institute of Pharmaceutical Science and Technology, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, People's Republic China.

ACS applied materials & interfaces

|January 19, 2024

概括

一种新型的异质催化剂使用在基支持上培养的共价有机框架 (COF),有效催化流体化学中的反应. 这种稳定,可回收的催化剂为工业应用提供高金属负载和低扩散电阻.

关键词:

这就是CuAACAC.连续流动的连续流动.协价有机框架协价有机框架不同质的催化剂.铺满床的床铺已经装好了.

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Last Updated: Jul 5, 2025

A Continuous-flow Photocatalytic Reactor for the Precisely Controlled Deposition of Metallic Nanoparticles

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科学领域:

材料科学材料科学材料科学
催化剂是一种催化剂.
化学工程是化学工程的重要组成部分.

背景情况:

流化学在化学合成中具有优势,包括通过异质催化剂有效分离和循环利用.
对于有效的异质催化剂的选择有限,阻碍了在连续流过程中广泛采用.
开发稳定,高负载的异质催化剂对于推进化学技术至关重要.

研究的目的:

为流体化学应用开发一种新的,稳定的,高负载的异质催化剂.
为了研究Huisgen 1,3-双极循环添加和鲁芬胺合成中的新材料的催化性能.
评估催化剂的可回收性,稳定性和扩散特性.

主要方法:

在凝 (SiO2) 支持的基板上生长共价有机框架 (COFs, TpBpy).
在COF修饰的表面上化铜,以产生SiO2@CuI-TpBpy异质催化剂.
评估批量和连续流动Huisgen循环添加反应中的催化活性.
评估催化剂在多个周期和连续运行中的稳定性和可回收性.

主要成果:

在批量条件下,合成的SiO2@CuI-TpBpy催化剂在三组件Huisgen循环添加中表现出高活性和优异的产量.
催化剂结构和铜含量在五个循环后保持稳定,显示出强大的可回收性.
鲁菲纳胺的连续流合成在24小时内实现了89%的产量,铜出最小.
催化系统显示颗粒大小对内部扩散的影响微不足道.

结论:

在基上封装COF提供了一个可行的策略,用于设计高负载,稳定的异质催化剂.
开发的催化剂有效用于连续流合成,提供高效率和可回收性.
这种方法为工业异质催化剂提供了一条新的途径,其内部扩散阻力降低.