Preparation of copper based metal organic framework materials and its effective adsorptive removal of ceftazidime from aqueous solutions

Wang, Ge; Sun, Tingting; Sun, Zhirong; Hu, Xiang

doi:10.1016/j.apsusc.2020.147411

Cited by 38 publications

(24 citation statements)

References 74 publications

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“…The peaks at around 1373 and 1445 cm −1 are assigned to symmetric and asymmetric stretching vibrations of O=-C-O. 26,27 The characteristic peaks around 1373 and 1445 cm −1 agreed well with the carboxylate group in Cu-MOF. 26 The peak near 478 cm −1 corresponds to the Cu O bending vibration.…”

Section: Characterization Of Catalystsmentioning

confidence: 58%

“…The Cu-2p 3/2 profile can be deconvoluted into two types of copper ions: divalent copper ion (Cu 2+ ) around 934.77 eV and monovalent copper ion (Cu + ) around 932.71 eV. 26 By fitting the Cu-2p 3/2 spectra, Cu 2+ was the main form of copper element in the Cu-MOF catalyst with a ratio of Cu 2+ /(Cu 2+ + Cu 1+ ) = 75.5. Cu-MOF is a crystalline porous material with three-dimensional network structure, which is formed by the coordination bonds between the Cu ions and the organic ligand (1,3,5-benzenetricarboxylic acid).…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

“…26 The peak near 478 cm −1 corresponds to the Cu O bending vibration. 26 The 1103 cm −1 band was identified as the C H inplane bending vibration. 26 The wide peaks at 3434 and 2918 cm −1 were associated with stretching vibrations of O H and C H in the Cu-MOF material, respectively.…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

“…26 The 1103 cm −1 band was identified as the C H inplane bending vibration. 26 The wide peaks at 3434 and 2918 cm −1 were associated with stretching vibrations of O H and C H in the Cu-MOF material, respectively. 26 Bands corresponding to the carboxyl functional group (3434 and 2918 cm −1 ) were also observed in the FTIR spectrum of the organic ligand of 1,3,5-benzenetricarboxylic acid (Fig.…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

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Selective preparation of bio‐based high‐value chemical of cresol with Cu‐MOF catalyst

Zhang

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND The development of efficient synthetic pathways for bio‐based chemicals is beneficial to sustainable development of the chemical industry. However, directional production of phenolic chemicals using lignocellulose remains a challenging issue, because the reaction paths as well as intermediates in the catalytic transformation of lignocellulose are often complicated. RESULTS Bio‐based cresol can be selectively prepared from lignocellulose biomass. This steerable transformation has been achieved by lignocellulose catalytic pyrolysis to aromatic intermediates over a magnetic oxide‐modified zeolite catalyst (Fe3O4@HZSM‐5) and intermediate hydroxylation to cresol over a metal–organic framework catalyst (Cu‐MOF). Based on the analysis of intermediates and on catalyst characterization, the corresponding reaction pathways are put forward. Using the Cu‐MOF catalyst, the highest selectivity of cresol (81.5%) and the highest conversion (76.8%) were gained at 40 °C in 4 h. CONCLUSIONS The work presented proves that an important phenolic chemical (cresol) can be selectively prepared from lignocellulose raw materials. The Cu‐MOF catalyst shows superior performance and good reusability in the bio‐cresol synthesis. Reactive oxygen species take a prominent role in the cresol synthesis. © 2022 Society of Chemical Industry (SCI).

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Section: Characterization Of Catalystsmentioning

confidence: 58%

Section: Characterization Of Catalystsmentioning

confidence: 99%

Section: Characterization Of Catalystsmentioning

confidence: 99%

Section: Characterization Of Catalystsmentioning

confidence: 99%

See 2 more Smart Citations

Selective preparation of bio‐based high‐value chemical of cresol with Cu‐MOF catalyst

Zhang

et al. 2022

J of Chemical Tech & Biotech

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“…Also, there were smaller spherical particles around ZIF@ADH/NAD-MSN/LDH. By analyzing the size of these particles, these may be the MSN particles that were not wrapped by ZIF-8 [ 50 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation of ZIF@ADH/NAD-MSN/LDH Core Shell Nanocomposites for the Enhancement of Coenzyme Catalyzed Double Enzyme Cascade

et al. 2021

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The field of enzyme cascades in limited microscale or nanoscale environments has undergone a quick growth and attracted increasing interests in the field of rapid development of systems chemistry. In this study, alcohol dehydrogenase (ADH), lactate dehydrogenase (LDH), and mesoporous silica nanoparticles (MSN) immobilized nicotinamide adenine dinucleotide (NAD+) were successfully immobilized on the zeolitic imidazolate frameworks (ZIFs). This immobilized product was named ZIF@ADH/NAD-MSN/LDH, and the effect of the multi-enzyme cascade was studied by measuring the catalytic synthesis of lactic acid. The loading efficiency of the enzyme in the in-situ co-immobilization method reached 92.65%. The synthesis rate of lactic acid was increased to 70.10%, which was about 2.82 times that of the free enzyme under the optimal conditions (40 °C, pH = 8). Additionally, ZIF@ADH/NAD-MSN/LDH had experimental stability (71.67% relative activity after four experiments) and storage stability (93.45% relative activity after three weeks of storage at 4 °C; 76.89% relative activity after incubation in acetonitrile-aqueous solution for 1 h; 27.42% relative activity after incubation in 15% N, N-Dimethylformamide (DMF) solution for 1 h). In summary, in this paper, the cyclic regeneration of coenzymes was achieved, and the reaction efficiency of the multi-enzyme biocatalytic cascade was improved due to the reduction of substrate diffusion.

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Revisiting the calculation of thermodynamic parameters of adsorption processes from the modified equilibrium constant of the Redlich–Peterson model

Tran

Ninh

Lima

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND:The adsorption equilibrium constant of the Langmuir model (K L ; L mol −1 ) has been applied as the standard thermodynamic equilibrium constant, K o Eq , for calculating the thermodynamic parameters (ΔG°, ΔS°, and ΔH°) of an adsorption processes by using the van't Hoff equation. Some authors have (directly and indirectly) applied the constant K RP (L kg −1 ) of the Redlich-Peterson model for such calculations. However, this is an incorrect application because the unit of K RP is not suitable (it is not an equilibrium constant). Its new adsorption equilibrium constant, K e(RP) (L mol −1 ), was revisited based on a RP (L mol −1 ) g . In the literature, there is still uncertainty regarding the application of a RP as K o Eq for calculating the thermodynamic parameters. Therefore, the present study aimed to evaluate the feasibility of applying K e(RP) to calculate thermodynamic parameters using available literature data. The thermodynamic parameters obtained from K e(RP) were compared to those from K L . A case study using a biosorbent for adsorbing methylene blue dye at different temperatures was carried out to re-verify the feasibility. RESULTS:The Redlich-Peterson model is only valid when its exponent is in a strict range (0 ≤ g ≤ 1). The Redlich-Peterson model (68%; 227 observations collected from 52 published papers) describes adsorption equilibrium datasets better than the Langmuir model. The negative ΔG°values obtained based on K e(RP) (11.7-47.6 kJ mol −1 ) were significantly different (p = 2.98 × 10 −12 ) from those on K L (12.2-40.8 kJ mol −1 ). The magnitudes of ΔH°obtained based on K e(RP) were significantly different (P < 0.05) to those on K L ; however, such differences did not affect conclusions drawn on dominant mechanism adsorption (physical or chemical). The magnitude of ΔH°for chemisorption (involved in covalent bonds) is higher than 200 kJ mol −1 . For the case study, the ΔH°(kJ mol −1 ) and ΔS°[J mol −1 × K −1 ] values calculated based on K e(RP) (11.65 and 111.5) were like those on K L (11.34 and 110.4, respectively). CONCLUSION: A new equilibrium constant, K e(RP) (L mol −1 ), of the Redlich-Peterson model can be applied as K o Eq for calculating the thermodynamic parameters (ΔG°, ΔS°, and ΔH°) of an adsorption processes under specific cases (i.e., F, H, and L-shaped adsorption isotherms). Most of the adsorption processes (98%) involve physical adsorption.

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Preparation of copper based metal organic framework materials and its effective adsorptive removal of ceftazidime from aqueous solutions

Cited by 38 publications

References 74 publications

Selective preparation of bio‐based high‐value chemical of cresol with Cu‐MOF catalyst

Selective preparation of bio‐based high‐value chemical of cresol with Cu‐MOF catalyst

Preparation of ZIF@ADH/NAD-MSN/LDH Core Shell Nanocomposites for the Enhancement of Coenzyme Catalyzed Double Enzyme Cascade

Revisiting the calculation of thermodynamic parameters of adsorption processes from the modified equilibrium constant of the Redlich–Peterson model

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