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Shin J, An B. Effect of ligand interactions within modified granular activated carbon (GAC) on mixed perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) adsorption. CHEMOSPHERE 2024; 357:142025. [PMID: 38614400 DOI: 10.1016/j.chemosphere.2024.142025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 04/06/2024] [Accepted: 04/10/2024] [Indexed: 04/15/2024]
Abstract
A new adsorbent based on commercial granular activated carbon (GAC) and loaded with Cu(II) (GAC-Cu) was prepared to enhance the adsorption capacity of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS). The surface area (SA) and pore volume of GAC-Cu decreased by ∼15% compared to those of pristine GAC. The scanning electron microscopy-energy dispersive spectrometry (SEM-EDS) and leaching test results indicated that, compared with GAC, the Cu atomic ratio and Cu amount in GAC-Cu increased by 2.91 and 2.43 times, respectively. The point of zero charge (PZC) measured using a salt addition method obtained a pH of 6.0 (GAC) and 5.0 (GAC-Cu). According to the isotherm models obtaining highest coefficient of determination (R2), GAC-Cu exhibited a 20.4% and 35.2% increase for PFOA and PFOS in maximum uptake (qm), respectively, compared to those of GAC. In addition, the adsorption affinity (b) for GAC-Cu increased by 1045% and 175% for PFOA and PFOS, respectively. The pH effect on the adsorption capacity of GAC-Cu was investigated. The uptake of PFOA and PFOS decreased with an increase in pH for both GAC and GAC-Cu. GAC-Cu exhibited higher uptake than GAC at pH 6 and 7, but no enhanced uptake was observed at pH 4.0, 5.0, and 8.5. Therefore, ligand interaction was effective at weak acid or neutral pH.
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Affiliation(s)
- Jeongwoo Shin
- Department of Civil, Environmental, and Biomedical Engineering, Sangmyung University, Cheonan, 31066, Republic of Korea
| | - Byungryul An
- Department of Civil Engineering, Sangmyung University, Cheonan, 31066, Republic of Korea.
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Solid oxide fuel cells (SOFCs) fed with biogas containing hydrogen chloride traces: Impact on direct internal reforming and electrochemical performance. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Makwana M, Kodgire P, Kumar S, Suriapparao DV, Kumar P, Jasra RV. Experimental and Modeling Study on Removal of Chloride Species from Refinery and Petrochemical Streams Using Modified Carbon, Alumina, and Molecular Sieve 13X. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00575] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mayank Makwana
- Department of Chemical Engineering, Pandit Deendayal Energy University, Raison, Gandhinagar 382426, Gujarat, India
| | - Pravin Kodgire
- Department of Chemical Engineering, Pandit Deendayal Energy University, Raison, Gandhinagar 382426, Gujarat, India
| | - Satish Kumar
- R&D Centre, Vadodara Manufacturing Division, Reliance Industries Limited, Vadodara 391346, Gujarat, India
| | - D. V. Suriapparao
- Department of Chemical Engineering, Pandit Deendayal Energy University, Raison, Gandhinagar 382426, Gujarat, India
| | - Prakash Kumar
- R&D Centre, Vadodara Manufacturing Division, Reliance Industries Limited, Vadodara 391346, Gujarat, India
| | - Raksh Vir Jasra
- R&D Centre, Vadodara Manufacturing Division, Reliance Industries Limited, Vadodara 391346, Gujarat, India
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Liu Y, Li J, Das A, Kim H, Jones LO, Ma Q, Bedzyk MJ, Schatz GC, Kratish Y, Marks TJ. Synthesis and Structure-Activity Characterization of a Single-Site MoO 2 Catalytic Center Anchored on Reduced Graphene Oxide. J Am Chem Soc 2021; 143:21532-21540. [PMID: 34914390 DOI: 10.1021/jacs.1c07236] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Molecularly derived single-site heterogeneous catalysts can bridge the understanding and performance gaps between conventional homogeneous and heterogeneous catalysis, guiding the rational design of next-generation catalysts. While impressive advances have been made with well-defined oxide supports, the structural complexity of other supports and the nature of the grafted surface species present an intriguing challenge. In this study, single-site Mo(═O)2 species grafted onto reduced graphene oxide (rGO/MoO2) are characterized by XPS, DRIFTS, powder XRD, N2 physisorption, NH3-TPD, aqueous contact angle, active site poisoning assay, Mo EXAFS, model compound single-crystal XRD, DFT, and catalytic performance. NH3-TPD reveals that the anchored MoO2 moiety is not strongly acidic, while Mo 3d5/2 XPS assigns the oxidation state as Mo(VI), and XRD shows little rGO periodicity change on MoO2 grafting. Contact angle analysis shows that MoO2 grafting consumes rGO surface polar groups, yielding a more hydrophobic surface. The rGO/MoO2 DRIFTS assigns features at 959 and 927 cm-1 to the symmetric and antisymmetric Mo═O stretching modes, respectively, of an isolated cis-(O═Mo═O) moiety, in agreement with DFT computation. Moreover, the Mo EXAFS rGO/MoO2 structural data are consistent with isolated (C-O)2-Mo(═O)2 species having two Mo═O bonds and two Mo-O bonds at distances of 1.69(3) and 1.90(3) Å, respectively. rGO/MoO2 is also more active than the previously reported AC/MoO2 catalyst, with reductive carbonyl coupling TOFs approaching 1.81 × 103 h-1. rGO/MoO2 is environmentally robust and multiply recyclable with 69 ± 2% of the Mo sites catalytically significant. Overall, rGO/MoO2 is a structurally well-defined and versatile single-site Mo(VI) dioxo heterogeneous catalytic system.
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Affiliation(s)
- Yiqi Liu
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Jiaqi Li
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Anusheela Das
- Department of Material Science and Engineering and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Hacksung Kim
- Center for Catalysis and Surface Science, Northwestern University, Evanston, Illinois 60208, United States.,Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Leighton O Jones
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Qing Ma
- DND-CAT, Northwestern Synchrotron Research Center at the Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Michael J Bedzyk
- Department of Material Science and Engineering and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - George C Schatz
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Yosi Kratish
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Tobin J Marks
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
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Preparation of Nickel Nanocatalysts and Application to the Hydrodechlorination of 3-Chlorophenol under Liquid Phase. J CHEM-NY 2021. [DOI: 10.1155/2021/8580754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Nickel nanoparticles were successfully synthesized via the reduction of nickel salt using ethylene glycol (EG) and sodium borohydride (NaBH4) as reducing agents. These nickel nanoparticles were then loaded on the supports as Ni-X (X = vanadium phosphorus oxides (VPO), TiO2, and ZnO) in high loading yield. The optical properties of these catalysts were characterized by UV-vis spectroscopy, the structure of Ni-X was studied by powder X-ray diffraction (PXRD), the distribution of Ni particles in X was studied by transmission electron microscopy (TEM), and the specific surface area of Ni-X was evaluated by N2 adsorption isotherm analysis at 77 K. All results corroborated the loading process. Indeed, TEM image indicated that the nickel nanoparticles size is in the range of 14 ÷ 16 nm and fully loaded into X. The activities of these catalysts were performed on the hydrodechlorination of 3-chlorophenol in the presence of sodium hydroxide as base at atmospheric pressure and at RT. The results showed that Ni-X exhibited high activities up to 98% within 90 min in the case of Ni-ZnO catalyst.
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