Fonsaca Jéssica E S, Lima Carlos Eduardo, Martins Kevin Stefan Boszko, Domingues Sergio H, de Matos Christiano J S
School of Engineering, Mackenzie Presbyterian University, Sao Paulo 01302-907, Brazil.
MackGraphe, Mackenzie Presbyterian Institute, Sao Paulo 01302-907, Brazil.
Langmuir. 2024 Oct 15;40(41):21442-21452. doi: 10.1021/acs.langmuir.4c02235. Epub 2024 Oct 2.
Covalently cross-linked 2D heterostructures may represent a ground-breaking approach to creating materials with multifunctionalities. To date, however, this field still remains relatively unexplored. In the present work, CoO/GO covalently linked heterostructures (CoO/GO-CL) were produced using 2D-CoO functionalized with (3-aminopropyl)triethoxysilane (APTES) to react with the carboxyl groups of graphene oxide (GO). The surface and interface properties of the final material were assessed through electrochemical and catalytic studies. We found that the covalent bonds lead to a self-standing and ordered final structure, not observed for the noncovalent material (CoO/GO-nCL), also produced for comparison. The catalytic activity of CoO/GO-CL over the degradation of Rhodamine 6G showed great performance and the possibility of recycling the catalyst. Electrochemical evaluation stated higher specific capacitance for the covalently bonded material (468 F g against 110 F g). Overall, results showed that the covalent bonds may be improving charge-transfer and interfacial area features, thus leading to enhanced catalytic and electrochemical performances.
共价交联的二维异质结构可能是一种创造多功能材料的开创性方法。然而，迄今为止，该领域仍相对未被探索。在本工作中，使用用（3-氨丙基）三乙氧基硅烷（APTES）功能化的二维CoO与氧化石墨烯（GO）的羧基反应制备了共价连接的CoO/GO异质结构（CoO/GO-CL）。通过电化学和催化研究评估了最终材料的表面和界面性质。我们发现，共价键导致了一种自立且有序的最终结构，这在为进行比较而制备的非共价材料（CoO/GO-nCL）中未观察到。CoO/GO-CL对罗丹明6G降解的催化活性表现出优异性能以及催化剂循环利用的可能性。电化学评估表明，共价键合材料具有更高的比电容（468 F/g，而相比之下为110 F/g）。总体而言，结果表明共价键可能改善了电荷转移和界面面积特性，从而导致催化和电化学性能增强。
