Ni–rGO–zeolite nanocomposite: an efficient heterogeneous catalyst for one-pot synthesis of triazoles in water

Abstract

An important group of pharmaceutical material, 1,2,3-triazoles has been synthesised using a Ni-based nanocomposite catalyst (Ni–rGO–zeolite) through azide alkyne cycloaddition (NiAAC). First, GO-zeolite hybrid was prepared through protonation of Na-Y-zeolite...

Co-Doped Zeolite–GO Nanocomposite as a High-Performance ORR Catalyst for Sustainable Bioelectricity Generation in Air-Cathode Single-Chambered Microbial Fuel Cells

“…X-ray photoelectron spectroscopy (XPS) was used to investigate the valence state of the synthesized electrocatalysts (Figure ). The XPS survey profile of the synthesized nanocomposite displays the characteristic binding energy peaks of Al 2p, Si 2p, Na 1s, C 1s, and Co 2p, representing the existence of these elements in the Co/zeolite–GO (1:2) catalyst (Figure a) Figure S1 displays the XPS survey profile of the synthesized hybrid catalysts Z 1 and Z 3 .…”

“…TEM micrographs validate the fact that nanoparticles are entirely fixed to the surface of the support material due to a synergistic effect between them. 50 The Co species are consistently distributed on the support matrix due to the interaction between the zeolite crystal and graphene oxide functional groups, as shown in Figure 5b. 8,50 TEM micrographs (Figure 5a,5c) of nanocomposites Z 1 and Z 3 exhibit agglomerated cobalt nanoparticles on the support matrix.…”

“…The XPS survey profile of the synthesized nanocomposite displays the characteristic binding energy peaks of Al 2p, Si 2p, Na 1s, C 1s, and Co 2p, representing the existence of these elements in the Co/ zeolite−GO (1:2) catalyst (Figure 2a). 50 Figure S1 displays the XPS survey profile of the synthesized hybrid catalysts Z 1 and Z 3 . Further studies of the interaction between GO and the Co deconvolution of Co 2p, C 1s, and O 1s elements were also accomplished.…”

On the application of 3d metals for C–H activation toward bioactive compounds: The key step for the synthesis of silver bullets

“…It is one of the metals contained in stainless steel [248], a stable alloy used to construct several industrial products. It is also applied as a powerful catalyst in polymerization [249,250], C-C coupling [251], oxygen [252] or hydrogen evolution [253], or even cycloaddition reactions [254]. Its accessibility and high catalytic activity have been well-explored also in C-H activation processes [255][256][257][258][259].…”

Nanostructured Ni(OH)2–ZnO mixed crystals as recyclable catalysts for the synthesis of N-unsubstituted 1,2,3-triazoles

“…In the recent years, nickel based catalysts have been in the spotlight for the development of N-substituted 1,2,3-triazoles. [30][31][32][33][34] Getting fortified from these works, we thought of incorporating nickel to our catalytic system with a view that it may adhere some synergistic effect on ZnO nanoparticles that will enhance the formation of N-unsubstituted triazoles with a gratifying yield. Hence, by using the co-precipitation method, we prepared Ni(OH) 2 -ZnO nanostructured mixed crystals which when added to the reaction mixture produced the desired triazole with excellent yield(~96%)(Figure S1, SI).…”