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Cavuoto D, Ravasio N, Zaccheria F, Marelli M, Cappelletti G, Campisi S, Gervasini A. Tuning the Cu/SiO2 wettability features for bio-derived platform molecules valorization. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Noble metal nanoparticles supported on titanate nanotubes as catalysts for selective hydrogenation of nitroarenes. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.09.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Abu El-Soad AM, Lazzara G, Abd El-Magied MO, Cavallaro G, Al-Otaibi JS, Sayyed MI, Kovaleva EG. Chitosan Functionalized with Carboxyl Groups as a Recyclable Biomaterial for the Adsorption of Cu (II) and Zn (II) Ions in Aqueous Media. Int J Mol Sci 2022; 23:ijms23042396. [PMID: 35216511 PMCID: PMC8875004 DOI: 10.3390/ijms23042396] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Revised: 02/13/2022] [Accepted: 02/14/2022] [Indexed: 12/20/2022] Open
Abstract
The modification of chitosan represents a challenging task in obtaining biopolymeric materials with enhanced removal capacity for heavy metals. In the present work, the adsorption characteristics of chitosan modified with carboxyl groups (CTS-CAA) towards copper (II) and zinc (II) ions have been tested. The efficacy of the synthesis of CTS-CAA has been evaluated by studying various properties of the modified chitosan. Specifically, the functionalized chitosan has been characterized by using several techniques, including thermal analyses (differential scanning calorimetry and thermogravimetry), spectroscopies (FT-IR, XRD), elemental analysis, and scanning electron microscopy. The kinetics and the adsorption isotherms of CTS-CAA towards both Cu (II) and Zn (II) have been determined in the aqueous solvent under variable pH. The obtained results have been analyzed by using different adsorption models. In addition, the experiments have been conducted at variable temperatures to explore the thermodynamics of the adsorption process. The regeneration of CTS-CAA has been investigated by studying the desorption process using different eluents. This paper reports an efficient protocol to synthesize chitosan-based material perspective as regenerative adsorbents for heavy metals.
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Affiliation(s)
- Asmaa M. Abu El-Soad
- Department of Technology of Organic Synthesis, Institute of Chemical Technology, Ural Federal University, Mira St. 19, 620002 Yekaterinburg, Russia;
- Nuclear Materials Authority, El Maadi, Cairo 11381, Egypt;
- Correspondence: (A.M.A.E.-S.); (G.L.); Tel.: +79-827-280-946 (A.M.A.E.-S.); +39-328-427-9554 (G.L.)
| | - Giuseppe Lazzara
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze, Parco d’Orleans II, Ed. 17, 90128 Palermo, Italy;
- Correspondence: (A.M.A.E.-S.); (G.L.); Tel.: +79-827-280-946 (A.M.A.E.-S.); +39-328-427-9554 (G.L.)
| | | | - Giuseppe Cavallaro
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze, Parco d’Orleans II, Ed. 17, 90128 Palermo, Italy;
| | - Jamelah S. Al-Otaibi
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia;
| | - M. I. Sayyed
- Department of Physics, Faculty of Science, Isra University, Amman 11622, Jordan;
- Department of Nuclear Medicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman bin Faisal University (IAU), Dammam 31441, Saudi Arabia
| | - Elena G. Kovaleva
- Department of Technology of Organic Synthesis, Institute of Chemical Technology, Ural Federal University, Mira St. 19, 620002 Yekaterinburg, Russia;
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Surface functionalization of mesoporous silica with maltodextrin for efficient adsorption of selective heavy metal ions from aqueous solution. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127695] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Tsou YJ, To TD, Chiang YC, Lee JF, Kumar R, Chung PW, Lin YC. Hydrophobic Copper Catalysts Derived from Copper Phyllosilicates in the Hydrogenation of Levulinic Acid to γ-Valerolactone. ACS APPLIED MATERIALS & INTERFACES 2020; 12:54851-54861. [PMID: 33232108 DOI: 10.1021/acsami.0c17612] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A reduction-silylation-reduction method was developed to synthesize hydrophobic Cu catalysts derived from Cu phyllosilicates (CuPS). Triethoxy(octyl)silane (OTS) was used as the coupling agent. The OTS-grafted, reduced CuPS catalysts were applied in the hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL). The most promising catalyst was synthesized by reducing CuPS at a high temperature (350 °C for 3 h), followed by OTS grafting, and then by repeating the previous reduction step. High LA conversion (95.7%), GVL yield (85.2%), and stability (3 cycles with a 7.5% loss of initial activity) were obtained at a mild reaction condition (130 °C with a H2 pressure of 12 bar). A high reduction temperature not only leads to a low oxidation state of Cu species but also suppresses the formation of silylation-induced acids. Moreover, the intrinsic activity of a reduced CuPS catalyst was nearly intact after subjecting to silylation and the second reduction treatment.
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Affiliation(s)
- Ya-Ju Tsou
- Department of Chemical Engineering, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan
| | - Thien Dien To
- Department of Chemical Engineering, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan
| | - Yu-Chia Chiang
- Department of Chemical Engineering, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan
| | - Jyh-Fu Lee
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu 30076, Taiwan
| | - Raju Kumar
- Institute of Chemistry, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei 11529, Taiwan
| | - Po-Wen Chung
- Institute of Chemistry, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei 11529, Taiwan
| | - Yu-Chuan Lin
- Department of Chemical Engineering, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan
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Abstract
The preparation methods of hydrophobic materials such as zeolites, modified silicas and polymers has been reviewed. Particular attention has been paid to the characterization methods classified according to the surface and bulk composition, on one hand, and to the measure of interactions with water or organic solvents, on the other. Some selected applications are analyzed in order to understand the relevance of the reactants/products adsorption to address activity and selectivity of the reaction. Thus, absorption of a non-polar reactant or desorption of a hydrophilic product are much easier on a hydrophobic surface and can effectively boost the catalytic activity.
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Li G, Wang B, Resasco DE. Oxide-catalyzed self- and cross-condensation of cycloketones. Kinetically relevant steps that determine product distribution. J Catal 2020. [DOI: 10.1016/j.jcat.2020.07.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Li G, Ngo DT, Yan Y, Tan Q, Wang B, Resasco DE. Factors Determining Selectivity of Acid- and Base-Catalyzed Self- and Cross-Condensation of Acetone and Cyclopentanone. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02987] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gengnan Li
- Center for Interfacial Reaction Engineering, School of Chemical, Biological, and Materials Engineering, The University of Oklahoma, 100 East Boyd St., Norman, Oklahoma 73019, United States
| | - Duong T. Ngo
- Center for Interfacial Reaction Engineering, School of Chemical, Biological, and Materials Engineering, The University of Oklahoma, 100 East Boyd St., Norman, Oklahoma 73019, United States
| | - Yu Yan
- Center for Interfacial Reaction Engineering, School of Chemical, Biological, and Materials Engineering, The University of Oklahoma, 100 East Boyd St., Norman, Oklahoma 73019, United States
| | - Qiaohua Tan
- Center for Interfacial Reaction Engineering, School of Chemical, Biological, and Materials Engineering, The University of Oklahoma, 100 East Boyd St., Norman, Oklahoma 73019, United States
| | - Bin Wang
- Center for Interfacial Reaction Engineering, School of Chemical, Biological, and Materials Engineering, The University of Oklahoma, 100 East Boyd St., Norman, Oklahoma 73019, United States
| | - Daniel E. Resasco
- Center for Interfacial Reaction Engineering, School of Chemical, Biological, and Materials Engineering, The University of Oklahoma, 100 East Boyd St., Norman, Oklahoma 73019, United States
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Affiliation(s)
- Gengnan Li
- Center for Interfacial Reaction Engineering and School of Chemical, Biological, and Materials Engineering, The University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Bin Wang
- Center for Interfacial Reaction Engineering and School of Chemical, Biological, and Materials Engineering, The University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Daniel E. Resasco
- Center for Interfacial Reaction Engineering and School of Chemical, Biological, and Materials Engineering, The University of Oklahoma, Norman, Oklahoma 73019, United States
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Role of water in cyclopentanone self-condensation reaction catalyzed by MCM-41 functionalized with sulfonic acid groups. J Catal 2019. [DOI: 10.1016/j.jcat.2019.07.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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