MOF-templated synthesis of CoFe2O4 nanocrystals and its coupling with peroxymonosulfate for degradation of bisphenol A

Yang, Shengjiong; Qiu, Xiaojie; Jin, Pengkang; Dzakpasu, Mawuli; Wang, Xiaochang C.; Zhang, Qionghua; Zhang, Lu; Yang, Lei; Ding, Dahu; Wang, Wendong

doi:10.1016/j.cej.2018.07.105

Cited by 339 publications

(48 citation statements)

References 64 publications

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“…The investigations indicated that CD-MOF@EDOT became thermally stable and exhibited preferable solubility in water. Subsequently, poly(acrylic acid), hydrophobic C 60 , and cholesterol as a functional group were incorporated with CD-MOFs by using a facile procedure [82,83,84], which also improved the stability of CD-MOFs in water and enhanced their drug-loading capacities. The postmodification strategy is used to graft functional groups to CD-MOFs, offering a new platform to expand the applications of CD-MOFs.…”

Section: Synthetic Strategy Of Cd-mofsmentioning

confidence: 99%

Cyclodextrin-Based Metal-Organic Frameworks (CD-MOFs) in Pharmaceutics and Biomedicine

et al. 2018

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Metal-organic frameworks (MOFs) show promising application in biomedicine and pharmaceutics owing to their extraordinarily high surface area, tunable pore size, and adjustable internal surface properties. However, MOFs are prepared from non-renewable or toxic materials, which limit their real-world applications. Cyclodextrins (CDs) are a typical natural and biodegradable cyclic oligosaccharide and are primarily used to enhance the aqueous solubility, safety, and bioavailability of drugs by virtue of its low toxicity and highly flexible structure, offering a peculiar ability to form CD/drug inclusions. A sophisticated strategy where CD is deployed as a ligand to form an assembly of cyclodextrin-based MOFs (CD-MOFs) may overcome real-world application drawbacks of MOFs. CD-MOFs incorporate the porous features of MOFs and the encapsulation capability of CD for drug molecules, leading to outstanding properties when compared with traditional hybrid materials. This review focuses on the inclusion technology and drug delivery properties associated with CD-MOFs. In addition, synthetic strategies and currently developed uses of CD-MOFs are highlighted as well. Also, perspectives and future challenges in this rapidly developing research area are discussed.

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Section: Synthetic Strategy Of Cd-mofsmentioning

confidence: 99%

Cyclodextrin-Based Metal-Organic Frameworks (CD-MOFs) in Pharmaceutics and Biomedicine

et al. 2018

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“…Huang et al reported the formation of CuCr 2 O 4 /CuO composite after the calcination of bimetallic Cr-embedded MOF-199 at 600 °C 9 . Yang et al reported the formation of CoFe 2 O 4 nanocrystals after the air calcination of bimetallic Co-Fe terephthalate MOF at 400 °C 22 . Lee and Kwak reported the formation of Mn-doped Fe 2 O 3 after air calcination of the bimetallic FeMn-MOF 21 .…”

Section: Introductionmentioning

confidence: 99%

Metal organic framework derived NaCoxOy for room temperature hydrogen sulfide removal

Gupta

Bae

Kim

2021

Sci Rep

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Novel NaCoxOy adsorbents were fabricated by air calcination of (Na,Co)-organic frameworks at 700 °C. The NaCoxOy crystallized as hexagonal microsheets of 100–200 nm thickness with the presence of some polyhedral nanocrystals. The surface area was in the range of 1.15–1.90 m2 g−1. X-ray photoelectron spectroscopy (XPS) analysis confirmed Co2+ and Co3+ sites in MOFs, which were preserved in NaCoxOy. The synthesized adsorbents were studied for room-temperature H2S removal in both dry and moist conditions. NaCoxOy adsorbents were found ~ 80 times better than the MOF precursors. The maximum adsorption capacity of 168.2 mg g−1 was recorded for a 500 ppm H2S concentration flowing at a rate of 0.1 L min−1. The adsorption capacity decreased in the moist condition due to the competitive nature of water molecules for the H2S-binding sites. The PXRD analysis predicted Co3S4, CoSO4, Co3O4, and Co(OH)2 in the H2S-exposed sample. The XPS analysis confirmed the formation of sulfide, sulfur, and sulfate as the products of H2S oxidation at room temperature. The work reported here is the first study on the use of NaCoxOy type materials for H2S remediation.

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“…Various preparation methods have been used in order to obtain cobalt ferrite NPs involving co-precipitation [12], thermal decomposition of metal salts in solvents with high boiling temperature [13], sol-gel [14], microemulsions [15], polyols [16], hydrothermal methods [17], combustion [18], sonochemistry [19], and electrochemical methods [20]. Particularly, mesoporous cobalt ferrite structures are very promising as recyclable anti-polluting agents [21], magnetically separable catalysts [22], and targeted drug delivery vehicles [23]. For these applications, mesoporous CoFe 2 O 4 particles must have high enough magnetization at saturation at ambient temperature (M s more than 30 emu/g) and significant BET surface area.…”

Section: Introductionmentioning

confidence: 99%

“…Mesoporous CoFe 2 O 4 particles, useful as catalysts in methane combustion reactions, were obtained by thermolysis of two new cobalt ferrioxalate coordination compounds [25] and have M s = 36.3 emu/g and S BET = 77.6 m 2 /g, and M s = 23.6 emu/g and S BET = 55.7 m 2 /g. Cobalt ferrite mesostructures built from nanocrystals, with M s = 34.73 emu/g and S BET = 60.4 m 2 /g, were very recently obtained by MOF-templated synthesis [21] and proven to be useful for degradation of bisphenol A. Recently, using a cationic surfactant (CTAB)-assisted solvothermal method [26], hollow mesoporous CoFe 2 O 4 magnetic particles with M s = 42.2 emu/g and S BET = 58.03 m 2 /g were synthesized and shown to be suitable for a microwave-triggered controllable drug delivery system.…”

Section: Introductionmentioning

confidence: 99%

Mesoporous Cobalt Ferrite Nanosystems Obtained by Surfactant-Assisted Hydrothermal Method: Tuning Morpho-structural and Magnetic Properties via pH-Variation

et al. 2020

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A facile and cheap surfactant-assisted hydrothermal method was used to prepare mesoporous cobalt ferrite nanosystems with BET surface area up to 151 m 2 /g. These mesostructures with high BET surface areas and pore sizes are made from assemblies of nanoparticles (NPs) with average sizes between 7.8 and 9.6 nm depending on the initial pH conditions. The pH proved to be the key factor for controlling not only NP size, but also the phase purity and the porosity properties of the mesostructures. At pH values lower than 7, a parasite hematite phase begins to form. The sample obtained at pH = 7.3 has magnetization at saturation M s = 38 emu/g at 300 K (54.3 emu/g at 10 K) and BET surface area S BET = 151 m 2 /g, whereas the one obtained at pH = 8.3 has M s = 68 emu/g at 300 K (83.6 emu/g at 10 K) and S BET = 101 m 2 /g. The magnetic coercive field values at 10 K are high at up to 12,780 Oe, with a maximum coercive field reached for the sample obtained at pH = 8.3. Decreased magnetic performances are obtained at pH values higher than 9. The iron occupancies of the tetrahedral and octahedral sites belonging to the cobalt ferrite spinel structure were extracted through decomposition of the Mössbauer patterns in spectral components. The magnetic anisotropy constants of the investigated NPs were estimated from the temperature dependence of the hyperfine magnetic field. Taking into consideration the high values of BET surface area and the magnetic anisotropy constants as well as the significant magnetizations for saturation at ambient temperature, and the fact that all parameters can be adjusted through the initial pH conditions, these materials are very promising as recyclable anti-polluting agents, magnetically separable catalysts, and targeted drug delivery vehicles.

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MOF-templated synthesis of CoFe2O4 nanocrystals and its coupling with peroxymonosulfate for degradation of bisphenol A

Cited by 339 publications

References 64 publications

Cyclodextrin-Based Metal-Organic Frameworks (CD-MOFs) in Pharmaceutics and Biomedicine

Cyclodextrin-Based Metal-Organic Frameworks (CD-MOFs) in Pharmaceutics and Biomedicine

Metal organic framework derived NaCoxOy for room temperature hydrogen sulfide removal

Mesoporous Cobalt Ferrite Nanosystems Obtained by Surfactant-Assisted Hydrothermal Method: Tuning Morpho-structural and Magnetic Properties via pH-Variation

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