1
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Ishida K, Kondo T. Evaluation of Surface Free Energy Inducing Interfacial Adhesion of Amphiphilic Cellulose Nanofibrils. Biomacromolecules 2023; 24:3786-3793. [PMID: 37450709 DOI: 10.1021/acs.biomac.3c00443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Cellulose nanofibrils (CNFs) have been studied extensively over the past decade. Their applications, e.g., as fillers for nanocomposites, stabilizers for Pickering emulsions, and scaffolds for cell culture, are mostly dictated by interfacial adhesion. In general, the individual surface free energy values of the constituents of a material correlate with its adsorption and desorption behaviors. In the present study, we estimated the surface free energy values of thin films composed of CNFs using traditional contact angle methods based on the Wenzel equation and van Oss-Chaudhury-Good theory. The accuracy and utility of the estimated surface free energy values were verified by close matching between the obtained adhesion energy values and the actual interfacial adsorption behaviors of the CNFs. Therefore, the evaluated surface energy values are expected to be a feasible tool for designing of interfacial interactions between CNF surfaces and other materials.
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Affiliation(s)
- Koichiro Ishida
- Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwaicho, Fuchu, Tokyo 183-8509, Japan
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tetsuo Kondo
- Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwaicho, Fuchu, Tokyo 183-8509, Japan
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2
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Qiao W, Fan X, Liu W, Khan FN, Zhang D, Han F, Yue H, Li Y, Dimitratos N, Albonetti S, Wen X, Yang Y, Besenbacher F, Li Y, Niemantsverdriet H, Lin H, Su R. Creating and Stabilizing an Oxidized Pd Surface under Reductive Conditions for Photocatalytic Hydrogenation of Aromatic Carbonyls. J Am Chem Soc 2023; 145:5353-5362. [PMID: 36853085 DOI: 10.1021/jacs.2c13196] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Photocatalysis provides an eco-friendly route for the hydrogenation of aromatic carbonyls to O-free aromatics, which is an important refining process in the chemical industry that is generally carried out under high pressure of hydrogen at elevated temperatures. However, aromatic carbonyls are often only partially hydrogenated to alcohols, which readily desorbs and are hardly further deoxygenated under ambient conditions. Here, we show that by constructing an oxide surface over the Pd cocatalyst supported on graphitic carbon nitride, an alternative hydrogenation path of aromatic carbonyls becomes available via a step-wise acetalization and hydrogenation, thus allowing efficient and selective production of O-free aromatics. The PdO surface allows for optimum adsorption of reactants and intermediates and rapid abstraction of hydrogen from the alcohol donor, favoring fast acetalization of the carbonyls and their consecutive hydrogenation to O-free hydrocarbons. The photocatalytic hydrogenation of benzaldehyde into toluene shows a high selectivity of >90% and a quantum efficiency of ∼10.2% under 410 nm irradiation. By adding trace amounts of HCl to the reaction solution, the PdO surface remains stable and active for long-term operation at high concentrations, offering perspective for practical applications.
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Affiliation(s)
- Wei Qiao
- Soochow Institute for Energy and Materials Innovations (SIEMIS), Soochow University, Suzhou 215006, China.,SynCat@Beijing, Synfuels China Technology Co. Ltd., Leyuan South Street II, No. 1, Beijing 101407, China
| | - Xing Fan
- Research Center for Carbon-based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing 100871, China
| | - Weifeng Liu
- Dipartimento di Chimica Industriale "Toso Montanari", University of Bologna, Bologna 40136, Italy
| | - Fahir Niaz Khan
- Soochow Institute for Energy and Materials Innovations (SIEMIS), Soochow University, Suzhou 215006, China
| | - Dongsheng Zhang
- Soochow Institute for Energy and Materials Innovations (SIEMIS), Soochow University, Suzhou 215006, China.,SynCat@Beijing, Synfuels China Technology Co. Ltd., Leyuan South Street II, No. 1, Beijing 101407, China
| | - Feiyu Han
- Soochow Institute for Energy and Materials Innovations (SIEMIS), Soochow University, Suzhou 215006, China.,SynCat@Beijing, Synfuels China Technology Co. Ltd., Leyuan South Street II, No. 1, Beijing 101407, China
| | - Huiyu Yue
- Soochow Institute for Energy and Materials Innovations (SIEMIS), Soochow University, Suzhou 215006, China
| | - Yajiao Li
- Soochow Institute for Energy and Materials Innovations (SIEMIS), Soochow University, Suzhou 215006, China
| | - Nikolaos Dimitratos
- Dipartimento di Chimica Industriale "Toso Montanari", University of Bologna, Bologna 40136, Italy.,Center for Chemical Catalysis-C3, Alma Mater Studiorum University of Bologna, Bologna 40136, Italy
| | - Stefania Albonetti
- Dipartimento di Chimica Industriale "Toso Montanari", University of Bologna, Bologna 40136, Italy.,Center for Chemical Catalysis-C3, Alma Mater Studiorum University of Bologna, Bologna 40136, Italy
| | - Xiaodong Wen
- SynCat@Beijing, Synfuels China Technology Co. Ltd., Leyuan South Street II, No. 1, Beijing 101407, China.,State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Yong Yang
- SynCat@Beijing, Synfuels China Technology Co. Ltd., Leyuan South Street II, No. 1, Beijing 101407, China.,State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Flemming Besenbacher
- The Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus, Denmark
| | - Yongwang Li
- SynCat@Beijing, Synfuels China Technology Co. Ltd., Leyuan South Street II, No. 1, Beijing 101407, China.,State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Hans Niemantsverdriet
- SynCat@Beijing, Synfuels China Technology Co. Ltd., Leyuan South Street II, No. 1, Beijing 101407, China.,SynCat@DIFFER, Syngaschem BV, 6336 HH Eindhoven, The Netherlands
| | - Haiping Lin
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China
| | - Ren Su
- Soochow Institute for Energy and Materials Innovations (SIEMIS), Soochow University, Suzhou 215006, China.,SynCat@Beijing, Synfuels China Technology Co. Ltd., Leyuan South Street II, No. 1, Beijing 101407, China
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3
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Kaszás T, Baráth BÁ, Balázs B, Blága T, Juhász L, Somsák L, Tóth M. Coupling Reactions of Anhydro-Aldose Tosylhydrazones with Boronic Acids. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27061795. [PMID: 35335162 PMCID: PMC8953641 DOI: 10.3390/molecules27061795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 03/03/2022] [Accepted: 03/06/2022] [Indexed: 11/17/2022]
Abstract
A catalyst-free coupling reaction between O-peracetylated, O-perbenzoylated, O-permethylated, and O-permethoxymethylated 2,6-anhydro-aldose tosylhydrazones (C-(β-d-glycopyranosyl)formaldehyde tosylhydrazones) and aromatic boronic acids is reported. The base-promoted reaction is operationally simple and exhibits a broad substrate scope. The main products in most of the transformations were open-chain 1-C-aryl-hept-1-enitol type compounds while the expected β-d-glycopyranosylmethyl arenes (benzyl C-glycosides) were formed in subordinate yields only. A mechanistic rationale is provided to explain how a complex substrate may change the well-established course of the reaction.
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4
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Isogai A. Emerging Nanocellulose Technologies: Recent Developments. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2000630. [PMID: 32686197 DOI: 10.1002/adma.202000630] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/10/2020] [Indexed: 05/22/2023]
Abstract
Nanocelluloses have unique morphologies, characteristics, and surface nanostructures, and are prepared from abundant and renewable plant biomass resources. Therefore, expansion of the use of CO2 -accumulating nanocelluloses is expected to partly contribute to the establishment of a sustainable society and help overcome current global environmental issues. Nanocelluloses can be categorized into cellulose nanonetworks, cellulose nanofibrils, and cellulose nanocrystals, depending on their morphologies. All of these materials are first obtained as aqueous dispersions. In particular, cellulose nanofibrils have homogeneous ≈3 nm widths and average lengths of >500 nm, and significant amounts of charged groups are present on their surfaces. Such charged groups are formed by carboxymethylation, C6-carboxylation, phosphorylation, phosphite esterification, xanthation, sulfate esterification, and C2/C3 dicarboxylation during the pretreatment of plant cellulose fibers before their conversion into cellulose nanofibrils via mechanical disintegration in water. These surface-charged groups in nanocelluloses can be stoichiometrically counterion-exchanged into diverse metal and alkylammonium ions, resulting in surface-modified nanocelluloses with various new functions including hydrophobic, water-resistant, catalytic, superdeodorant, and gas-separation properties. However, many fundamental and application-related issues facing nanocelluloses must first be overcome to enable their further expansion.
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Affiliation(s)
- Akira Isogai
- Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
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5
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Sun R, Zhu J, Wu H, Wang S, Li W, Sun Q. Modulating layer-by-layer assembled sodium alginate-chitosan film properties through incorporation of cellulose nanocrystals with different surface charge densities. Int J Biol Macromol 2021; 180:510-522. [PMID: 33745975 DOI: 10.1016/j.ijbiomac.2021.03.092] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/12/2021] [Accepted: 03/16/2021] [Indexed: 01/10/2023]
Abstract
In this work, 2,2,6,6-tetramethylpiperidine-1-oxyl-oxidized cellulose nanocrystals (TOCNs) were loaded into sodium alginate/chitosan multilayer film as nanofillers to investigate the modulation of the surface charge density of TOCNs on the film properties. First, the surface charge density of TOCNs was controlled by adjusting the carboxyl content and morphological size by varying the oxidant dosage. After oxidation, TOCN with higher surface charge density was observed to display a higher crystallinity, a more open internal structure, a better dispersibility and a slightly weaker thermal stability. In addition, a 15-layer film composed of sodium alginate and chitosan, called (SA/CH)15, was constructed by layer-by-layer assembly. Both in situ deposition monitoring and free-standing multilayer film formation indicated that TOCNs relied on strong electrostatic interactions and hydrogen bonding to achieve a compact and uniform interlayer and a thinner thickness of (SA/CH)15, which was more evident at a high surface charge density. The addition of TOCNs also enhanced the mechanical properties, thermal stability, hydrophobicity, and barrier properties of (SA/CH)15. In particular, the resulting sodium alginate/chitosan multilayer film exhibited an improved packaging performance when nanocomposite was performed using TOCN with a surface charge density of 3.22 ± 0.11 e nm-2.
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Affiliation(s)
- Ruonan Sun
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, People's Republic of China
| | - Junxiang Zhu
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, People's Republic of China
| | - Hao Wu
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, People's Republic of China; Qingdao Special Food Research Institute, Qingdao 266109, People's Republic of China.
| | - Shiqing Wang
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, People's Republic of China
| | - Wenxiang Li
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, People's Republic of China
| | - Qingjie Sun
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, People's Republic of China
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Abstract
Nanocellulose (NC) is a biomaterial with growing interest in the field of nanocomposites and sustainable materials. NC has various applications including biodegradable materials, reinforcing agents, packaging films, transpiring membranes and medical devices. Among the many applications, the use of NC functionalized with organic and inorganic groups has found wide use as a catalyst in chemical transformations. The goal of this review is to collect the current knowledge on its catalytic applications for chemical groups conversion. We have chosen to organize the manuscript according to subdivision of NC into Bacterial Nanocellulose (BNC), Cellulose Nanocrystals (CNCs), and Cellulose Nanofibers (CNFs) and their role as inorganic- and organic-functionalized NC-catalysts in organic synthesis. However, in consideration of the fact that the literature on this field is very extensive, we have decided to focus our attention on the scientific productions of the last five years.
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7
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Ellebracht NC, Jones CW. Functionalized cellulose nanofibril aerogels as cooperative acid-base organocatalysts for liquid flow reactions. Carbohydr Polym 2020; 233:115825. [PMID: 32059881 DOI: 10.1016/j.carbpol.2019.115825] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 12/13/2019] [Accepted: 12/31/2019] [Indexed: 10/25/2022]
Abstract
Cellulose nanomaterial aerogels are macroscopic porous solids with relatively high surface areas and are thus an interesting basis for renewable catalyst materials. Cross-linked acid-base bifunctional catalyst aerogels are produced here from TEMPO-oxidized cellulose nanofibrils (TOCNF) and demonstrated in both batch and flow catalysis. Recently established acid-base modification for catalysis is expanded upon for chemical or physical cross-linking with small molecules and polymers. Low density and relatively high surface area (up to 74 m2 g-1) aerogel catalysts are produced with a variety of processing approaches and then freeze-dried from water or tert-butyl alcohol/water mixtures. Finer pore structure and increased surface area are achieved with tert-butyl alcohol as co-solvent. Chemical cross-linking improved aerogel stability to solvents. Homogeneous and aerogel TOCNF catalysts are shown to be effective acid-base cooperative catalysts for aldol condensation reactions in batch reactions. Continuous flow reactions are performed with glass column reactors packed with aerogel catalysts that showed improved rates relative to batch experiments, while also demonstrating physical stability. Catalyst deactivation in flow reactions is observed and observations of deactivation support previously reported mechanisms of site poisoning by competitive chemisorption of reactants in analogous acid-base catalysts. This report is a key demonstration of cellulose nanofibril aerogels for catalysis in continuous liquid flow reactions.
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Affiliation(s)
- Nathan C Ellebracht
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA, 30332-0100, United States.
| | - Christopher W Jones
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA, 30332-0100, United States.
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8
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Meninno S. Valorization of Waste: Sustainable Organocatalysts from Renewable Resources. CHEMSUSCHEM 2020; 13:439-468. [PMID: 31634413 DOI: 10.1002/cssc.201902500] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Indexed: 06/10/2023]
Abstract
One of the greatest challenges facing our society is to reconcile our need to develop efficient and sophisticated chemical processes with the limited resources of our planet and its restricted ability to adsorb pollution. Organocatalysis has allowed many issues to be addressed in the development of sophisticated, but less polluting, processes. However, minimizing waste also means an efficient utilization of raw and renewable materials. Waste biomass represents an alternative to conventional petroleum-based chemical manufacturing and is a highly attractive renewable resource for the production of chemicals and high-value-added organocatalysts. Recent achievements in the use of renewable biomass feedstocks for the synthesis of organocatalysts are presented. Their application in synthetic methodologies, including multicomponent reactions, which are performed under solvent-free conditions or in eco-friendly reaction media, as well as recycling and reusing the organocatalysts, is illustrated. A few pioneering examples that demonstrate the potential of these promoters in asymmetric synthesis have also been documented. In particular, this review covers examples on the use of hetero- and homogeneous organocatalysts derived from 1) waste biopolymers, such as chitosan, alginic acid, and cellulose; ii) renewable platform molecules, such as levoglucosenone, isosorbide, mannose, d-glucosamine, and lecithin; 3) terpenes and rosin, such as pinane, isosteviol, and abietic acid; and iv) natural proteins (gelatin, bovine tendons, silk fibroin proteins).
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Affiliation(s)
- Sara Meninno
- Dipartimento di Chimica e Biologia, University of Salerno, Via Giovanni Paolo II, 84084, Fisciano, Italy
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9
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Hirayama Y, Kanomata K, Hatakeyama M, Kitaoka T. Chitosan nanofiber-catalyzed highly selective Knoevenagel condensation in aqueous methanol. RSC Adv 2020; 10:26771-26776. [PMID: 35515787 PMCID: PMC9055493 DOI: 10.1039/d0ra02757j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 07/07/2020] [Indexed: 11/24/2022] Open
Abstract
A chitosan nanofiber (CsNF)-catalyzed Knoevenagel reaction in green solvent, namely aqueous methanol, was investigated. CsNFs solely catalyzed the desired C–C bond formations in high yield with high selectivity, while conventional small-molecule amines, such as n-hexylamine and triethylamine, inevitably promoted transesterification to produce a large amount of solvolysis byproducts. Structural and chemical analyses of CsNFs suggested that the unique nanoarchitecture, in which chitosan molecules were bundled to ensure the high accessibility of substrates to catalytic sites, was critical to the highly efficient Knoevenagel condensation. The products were obtained in high purity without solvent-consuming purification, and the CsNF catalyst was easily removed and recycled. This study highlights a novel and promising function of CsNFs in green catalysis as emerging polysaccharide-based nanofibers. Chitosan nanofibers bearing abundant and accessible amines exposed on the solid surface catalyze a highly selective Knoevenagel condensation in green solvent, which completely avoids the formation of solvolysis byproducts.![]()
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Affiliation(s)
- Yusaku Hirayama
- Department of Agro-Environmental Sciences
- Graduate School of Bioresource and Bioenvironmental Sciences
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Kyohei Kanomata
- Department of Agro-Environmental Sciences
- Graduate School of Bioresource and Bioenvironmental Sciences
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Mayumi Hatakeyama
- Department of Agro-Environmental Sciences
- Graduate School of Bioresource and Bioenvironmental Sciences
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Takuya Kitaoka
- Department of Agro-Environmental Sciences
- Graduate School of Bioresource and Bioenvironmental Sciences
- Kyushu University
- Fukuoka 819-0395
- Japan
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10
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Ranaivoarimanana NJ, Habaki X, Uto T, Kanomata K, Yui T, Kitaoka T. Nanocellulose enriches enantiomers in asymmetric aldol reactions. RSC Adv 2020; 10:37064-37071. [PMID: 35521245 PMCID: PMC9057038 DOI: 10.1039/d0ra07412h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 09/25/2020] [Indexed: 12/26/2022] Open
Abstract
Catalytically inactive cellulose nanofibers with crystalline solid surfaces enhance highly enantioselective organocatalysis at the interface in proline-mediated aldol reactions.
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Affiliation(s)
| | - Xin Habaki
- Department of Agro-Environmental Sciences
- Graduate School of Bioresource and Bioenvironmental Sciences
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Takuya Uto
- Organization for Promotion of Tenure Track
- University of Miyazaki
- Miyazaki 889-2192
- Japan
| | - Kyohei Kanomata
- Department of Agro-Environmental Sciences
- Graduate School of Bioresource and Bioenvironmental Sciences
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Toshifumi Yui
- Department of Applied Chemistry
- Faculty of Engineering
- University of Miyazaki
- Miyazaki 889-2192
- Japan
| | - Takuya Kitaoka
- Department of Agro-Environmental Sciences
- Graduate School of Bioresource and Bioenvironmental Sciences
- Kyushu University
- Fukuoka 819-0395
- Japan
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11
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Concerted Catalysis by Nanocellulose and Proline in Organocatalytic Michael Additions. Molecules 2019; 24:molecules24071231. [PMID: 30934821 PMCID: PMC6480416 DOI: 10.3390/molecules24071231] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 03/23/2019] [Accepted: 03/27/2019] [Indexed: 12/25/2022] Open
Abstract
Cellulose nanofibers (CNFs) have recently attracted much attention as catalysts in various reactions. Organocatalysts have emerged as sustainable alternatives to metal-based catalysts in green organic synthesis, with concerted systems containing CNFs that are expected to provide next-generation catalysis. Herein, for the first time, we report that a representative organocatalyst comprising an unexpected combination of 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO)-oxidized CNFs and proline shows significantly enhanced catalytic activity in an asymmetric Michael addition.
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12
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Ellebracht NC, Jones CW. Optimized Cellulose Nanocrystal Organocatalysts Outperform Silica-Supported Analogues: Cooperativity, Selectivity, and Bifunctionality in Acid–Base Aldol Condensation Reactions. ACS Catal 2019. [DOI: 10.1021/acscatal.8b05180] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Nathan C. Ellebracht
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332-0100, United States
| | - Christopher W. Jones
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332-0100, United States
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13
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Cheng R, Kang M, Zhuang S, Shi L, Zheng X, Wang J. Adsorption of Sr(II) from water by mercerized bacterial cellulose membrane modified with EDTA. JOURNAL OF HAZARDOUS MATERIALS 2019; 364:645-653. [PMID: 30408766 DOI: 10.1016/j.jhazmat.2018.10.083] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 10/25/2018] [Accepted: 10/27/2018] [Indexed: 05/25/2023]
Abstract
The treatment of low-level radioactive wastewater is a critical and considerable challenge. Bacterial cellulose membrane (BCM) modified with ethylenediaminetetraacetic acid (EDTA) using (3-aminopropyl) triethoxysilane (APTES) as a crosslinker were used to remove Sr2+ in this work. SEM, XPS, and FTIR were used to characterize the morphology, structure, chemical shift, and functional groups of the as-prepared adsorbent. The synthesized BCM@APTES-EDTA presented a three-layer structure of membrane-net-membrane with nano-sized fibers (<100 nm). The adsorption of Sr2+ onto BCM@APTES-EDTA was investigated as a function of contact time and initial concentration of Sr2+. Results showed that the adsorption of Sr2+ followed the pseudo second-order kinetic model (R2 = 0.999), and fitted well with the Langmuir isotherm model (R2 = 0.996). The maximum adsorption capacity was calculated to be 44.86 mg g-1, which was comparable to other adsorbents. Additionally, the mechanism of Sr2+ adsorbed by the as-prepared adsorbent was studied through FTIR and XPS analysis, which indicated that the tertiary amines and carboxylate from grafted EDTA participated in the adsorption of Sr2+.
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Affiliation(s)
- Rong Cheng
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China
| | - Mi Kang
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China
| | - Shuting Zhuang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China
| | - Lei Shi
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China
| | - Xiang Zheng
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China.
| | - Jianlong Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China.
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