Controlled and restricted growth of cobalt nanoparticles embedded in ordered mesoporous carbons @ carbon nanotubes for metronidazole electrochemical biosensing study

In this article, controlled and restricted growth of cobalt nanoparticles embedded in ordered mesoporous carbon @ carbon nanotubes was designed and synthesized. SBA-15 was used as template, the polydopamine (PDA) was used as bridging agent, the carbon and nitrogen source and cobalt phthalocyanine was used as cobalt source. In the process of high temperature calcination, ordered mesoporous carbons was carbonized, transition metal ions were reduced to transition metal nanoparticles, and carbon nanotubes were catalyzed growth by cobalt at the same time. Combined high surface area and stability of ordered mesoporous carbons, high electrocatalytic activity of transition metal nanoparticles and high proton transport performance of carbon nanotubes, our preparaed Co NPs @NOMC@CNTs showed excellent electrocatalytic performance for metronidazole. In this paper, cobalt nanoparticles were embedded into the ordered mesoporous carbons, which can greatly enhance the active site inside the electrocatalyst, and limit the growth of nanoparticles, and achieve efficient electrocatalytic performance. This provides new ideas and methods for the preparation of new materials embedded with metal nanoparticles. The preparation process of the composite material is simple, green and economical, the synthesis method is novel, the preparation material is efficient, the preparation cost is low, and it has a broad application prospect in the industrialization field of economical and green electrocatalyst.