Bread-making synthesis of hierarchically Co@C nanoarchitecture in heteroatom doped porous carbons for oxidative degradation of emerging contaminants

Cobalt Entrapped in N,S‐Codoped Porous Carbon: Catalysts for Transfer Hydrogenation with Formic Acid

“…[46,47] For S ( Figure 2c), the typical thiophene-S peaks arising from S2p 3/2 (163.8 eV) and S2p 1/2 (165.0 eV) multiplets were observed, together with SO x centered at approximately 167.2 and 168.8 eV. [48] Specifically,t here was no peak at ab inding energy of approximately 162.4 eV,w hich is usually attributed to the CoÀSb ond, indicating no generation of cobalt sulfide in the samples of Co-NSPC-850 or direct Co-S interaction. [49] The spectrum of Co 2p 3/2 was composed of four peaks (Figure2d).…”

“…The full survey spectrum of Co‐NSPC‐850 is shown in Figure S6, which reveals the existence of C, N, S, O, and Co. As shown in Figure b, the high‐resolution N 1s spectrum was divided into five different peaks with binding energies of 398.6, 399.3, 400.5, 401.3, and 403.1 eV, corresponding to pyridinic N, Co–N, pyrrolic N, graphitic N, and N‐oxide, respectively . For S (Figure c), the typical thiophene‐S peaks arising from S 2p 3/2 (163.8 eV) and S 2p 1/2 (165.0 eV) multiplets were observed, together with SO x centered at approximately 167.2 and 168.8 eV . Specifically, there was no peak at a binding energy of approximately 162.4 eV, which is usually attributed to the Co−S bond, indicating no generation of cobalt sulfide in the samples of Co‐NSPC‐850 or direct Co–S interaction .…”

Highly Efficient Dynamic Degradation of Methylene Blue on Hierarchical Nitrogen/Cobalt‐Co‐Doped Carbonaceous Beads with Diffusion Promoting Nanostructures

“…Figure S1(a) reveals the XRD patterns of different samples. Firstly, the peaks at 43.08, 47.62, and 50.58° are in line with metal cobalt (corresponding to PDF #15‐0806) . The peaks near 30.48, 48.94, 54.32, 57.58° belong to cobalt (II,III) oxide (fitting with JCPDS NO 89‐1093) and the positions at 35.94, 39.88, 42.2, 62.18° are attributed to cobalt monoxide (according with JCPDS NO 43‐1004) .…”

“…Amongst various transition‐metals catalysts employed, because cobalt unique valence shell electron configuration, which is 3d 7 4s 2 , can facilitate electrons easily transfer between bivalency and trivalency; and nitrogen‐doping can alter local carbon skeleton electronic structure and generate carbo‐nitrogen‐based active sites, those carbon‐based materials have considered to be superior to the other metal‐based ones .…”

“…[4] Within this context, the advanced persulfate decontamination technologies utilizing transition metals as activators have been widely concerned for water treatment, considering that it can generate high oxidative radicals in the reaction systems. [5] Amongst various transition-metals catalysts employed, because cobalt unique valence shell electron configuration, which is 3d 7 4s 2 , [6] can facilitate electrons easily transfer between bivalency and trivalency; [7] and nitrogen-doping can alter local carbon skeleton electronic structure [8] and generate carbonitrogen-based active sites, [9] those carbon-based materials have considered to be superior to the other metal-based ones. [10,11] More recently, As was demonstrated in our previous work, seaweed-based sodium alginate could be desirably employed as starting material for cobalt fixation, because it can chelate with multivalent metal ions to form a cross-linking network through controllable sol-gel-like assembly process.…”