In-situ carbonization of ZIF-67 to fabricate magnetically Co/N-mC with high adsorption capacity toward water remediation

Abstract

Co and N co-modified mesoporous carbon composites (Co/N-mC) have been simply prepared at low cost from the carbonization of ZIF-67 wherein not only providing surface N-modification for promoting the adsorption behavior of acidic dyes, but also constructing a magnetic property for convenient separation. Co/N-mC composite presented the adsorption ability of MO (178 mg g−1) > RhB (141 mg g−1) (T = 25 °C, pH = 7.0, C0 = 20 mg L−1) because of its spacious porous structure (BET: 250.8 m2 g−1; pore size: 3.9 nm) and functional basic character (pyrrolic-N and pyridinic-N). Compared with basic dyes (RhB), mesoporous C doped with N improves the adsorption of acid dyes (MO). In addition, the magnetic properties introduced in the Co/N-mC make it easier to separate after adsorption and regeneration by an external magnetic field.

An electron “donor–acceptor–donor” strategy to activate ZIF-67 as a cathode material for fuel cells and zinc ion hybrid supercapacitor

“…The ZIF-67 showed a very high surface area of 1402 m 2 g −1 when compared with other results found in the literature. 21,22 It was observed that the surface area of the catalyst increased remarkably with an increase in the pyrolysis temperature. The obtained surface area values were 290, 410, 471, and 530 m 2 g −1 for the post-carbonization of AL-Co/NGC-T, with T increasing from 600 °C to 900 °C as shown in Fig.…”

“…5a) revealed a pure sodalite crystal structure with sharp peaks, which were are well indexed, and matches with previously reported spectra found in the literature. 21,22 The characteristic peaks of ZIF-67 changed due to the effect of thermal pyrolysis, revealing a new set of peaks corresponding to carbon and metallic Co as shown in Fig. 5a and b.…”

FeCo@N‐Doped Nanoparticles Encapsulated in Polyacrylamide‐Derived Carbon Nanocages as a Functional Filler for Polyethylene System

“…To create magnetic carbon-based nanocomposites, [10][11][12] a promising strategy seems to be the preparation, first, of a single mixture of the initial polymer and magnetic precursors. Further transformation of the obtained compounds into final magnetic carbon-based composites using the technology of high-temperature pyrolysis in an inert atmosphere allows [13][14][15] to suitably decorate carbon materials with various magnetic nanoparticles (NPs), i. e. ex situ.…”