Synthesis of a Magnetic 2D Co@NC-600 Material by Designing a MOF Precursor for Efficient Catalytic Reduction of Water Pollutants

Abstract

2D metal–organic framework (MOFs) can be ideal sacrificial templates for fabricating nanomaterials because of active sites exposed on the surface rather than in pores and channels, often exhibiting improved performance in catalysis applications. In this study, the novel 2D layered cobalt-based MOF [Co­(TPT)­(fma)­(H2O)2]·3H2O (Co-MOF) has been constructed by the selection of high N atom content ligands. On this basis, a 2D nitrogen-doped carbon-coated cobalt nanoparticle composite (Co@NC) was prepared by using this MOF as a precursor. Magnetic Co@NC has excellent catalytic activity and recycling features regarding the reaction of 4-nitrophenol (4-NP) reducing to 4-aminophenol (4-AP) in the presence of NaBH4 at ambient temperature. 2D Co@NC-600 can reach nearly 100% conversion within 120 s and its stability remains almost unchanged after five reaction cycles. Moreover, this Co@NC catalyst also is highly active for catalytic reduction of dyes such as Rhodamine B (RhB) and Methylene blue (MB).

Recent Advances and New Challenges: Two-Dimensional Metal–Organic Framework and Their Composites/Derivatives for Electrochemical Energy Conversion and Storage

“…High-resolution TEM confirmed the composite structure for the 2D Co/N-C hybrid. Simultaneously, the lattice fringe with an interplanar distance of ∼0.205 nm was assigned to the (111) crystal planes of Co. This confirmed the formation of zerovalent Co nanoparticles and the uniform distribution on the nitrogen-doped carbon matrix.…”

Ultrafine metallic cobalt nanoparticle encapsulated in N‐doped carbon as high‐efficiency catalysts for reduction of 4‐nitrophenol

“…Co@NC-600 0.5 0.1 2 100 2.5 [35] Co@N-CNT 0.25 1 5 100 0.05 [36] CoO x /CN-500 8 2 10 95 0.38 [37] Zn0.3Co2.7@NC 0.3 0.06 5 100 1.0 [38] Co-USi-800 0.36 0.4 4 98 0.22 [39] Co@INC 0.21 0.06 2 100 1.75 [28] Cu/Co@NCF 0.3 0.05 4 100 1.5 [40] Co@NCNT-11-800 2 3 12 94 0.05 [41] a…”

2D MOFs‐based Materials for the Application of Water Pollutants Removing: Fundamentals and Prospects

“…MV/RhB UV light 73.3/55.1 CNNSs/MIL-100(Fe) [109] RhB Visible light + H 2 O 2 100 N-Cu 2 O/carbon composites [110] MO Visible light 90 [{Co(5NH 2 -IPA)(1,2-bpe)}] 1 [111] RhB/MB Visible light + H 2 O 2 98/96 [Co 2 (1,4-BDC)(NCP) 2 ] [112] MV UV light 33.29 [Co 2 (4,4'-Hcpmb)(1,3-bib)] [113] MV UV light 94.7 [Co(bpco) 0.5 (tib)(H 2 O) 2 ] [114] MV UV light 55 [Mn 2 (μ 2 -H 2 O)(H 2 L)(CH 3 CN) 2 ] [115] MV UV light 51.73 [Mn(L) 0.5 (phen) • 0.5H 2 O] [115] MV UV light 55.31 MOF-5/LTH [116] MB UV-visible light 98.1 [Zn(L)(4,4'-bipy) • CH 3 CN] n [117] MV/RhB UV light 60.6/29.4 2D-CuTCPP [100] RhB Visible light 81.2 Co@NC-600 [118] MB/ RhB NaBH 4 99.9/95.7 nanosheet, of which the TC degradation efficiency can reach 73% within 5 min under visible light. In addition, Zhao's team reported a rapid microwave-assisted hydrothermal route for the assembly of 2D copper-porphyrin MOFs (Cu-TCPP MOFs) within an hour.…”

“…as a precursor to obtain a 2D N-doped carbon-coated cobalt nanoparticle composite (Co@NC). [118] A series experiments showed that when the calcining temperature at 600 °C, the catalyst (2D Co@NC-600) had the best catalytic ability of reducing 4-nitrophenol (4-NP) to 4-aninophenol (4-AP) in the presence of NaBH 4 . 2D Co@NC-600 can reach nearly 100% conversion within 120 s and can maintain stability almost unchanged after five cycles.…”