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Lin J, Xia X, Liu Y, Luan Z, Chen Y, Ma K, Geng B, Li H. Fabrication of hierarchical porous
fluoro‐PolyHIPE
materials with ultra‐high specific surface area via hypercrosslinking knitting technique. J Appl Polym Sci 2022. [DOI: 10.1002/app.52914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Junzhi Lin
- School of Chemistry and Chemical Engineering University of Jinan Jinan China
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials University of Jinan Jinan China
| | - Xianger Xia
- School of Chemistry and Chemical Engineering University of Jinan Jinan China
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials University of Jinan Jinan China
| | - Yifei Liu
- School of Materials Science and Engineering University of Jinan Jinan China
| | - Zhenchao Luan
- School of Chemistry and Chemical Engineering University of Jinan Jinan China
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials University of Jinan Jinan China
| | - Yezhen Chen
- School of Chemistry and Chemical Engineering University of Jinan Jinan China
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials University of Jinan Jinan China
| | - Kunkai Ma
- School of Chemistry and Chemical Engineering University of Jinan Jinan China
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials University of Jinan Jinan China
| | - Bing Geng
- School of Chemistry and Chemical Engineering University of Jinan Jinan China
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials University of Jinan Jinan China
| | - Hui Li
- School of Chemistry and Chemical Engineering University of Jinan Jinan China
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials University of Jinan Jinan China
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2
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Ly I, Layan E, Picheau E, Chanut N, Nallet F, Bentaleb A, Dourges MA, Pellenq RJ, Hillard EA, Toupance T, Dole F, Louërat F, Backov R. Design of Binary Nb 2O 5-SiO 2 Self-Standing Monoliths Bearing Hierarchical Porosity and Their Efficient Friedel-Crafts Alkylation/Acylation Catalytic Properties. ACS APPLIED MATERIALS & INTERFACES 2022; 14:13305-13316. [PMID: 35258941 DOI: 10.1021/acsami.1c24554] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Alkylation of aromatic hydrocarbons is among the most industrially important reactions, employing acid catalysts such as AlCl3, H2SO4, HF, or H3PO4. However, these catalysts present severe drawbacks, such as low selectivity and high corrosiveness. Taking advantage of the intrinsic high acid strength and Lewis and Brønsted acidity of niobium oxide, we have designed the first series of Nb2O5-SiO2(HIPE) monolithic catalysts bearing multiscale porosity through the integration of a sol-gel process and the physical chemistry of complex fluids. The MUB-105 series offers efficient solvent-free heterogeneous catalysis toward Friedel-Crafts monoalkylation and -acylation reactions, where 100% conversion has been reached at 140 °C while cycling. Alkylation reactions employing the MUB-105(1) catalyst have a maximum turnover number (TON) of 104 and a turnover frequency (TOF) of 9 h-1, whereas for acylation, MUB-105(1) and MUB-105(2) yield maximum TON and TOF values of 107 and 11 h-1, respectively. Moreover, the catalysts are selective, producing equal amounts of ortho- and para-substituted alkylated products and greater than 90% of the para-substituted acylated product. The highest catalytic efficiencies are obtained for the MUB-105(1) catalyst, bearing the smallest Nb2O5 particle sizes, lowest Nb2O5 content, and the highest amorphous character. The catalysts presented here are in a monolithic self-standing state, offering easy handling, reusability, and separation from the final products.
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Affiliation(s)
- Isabelle Ly
- CRPP-UMR CNRS 5031, Université de Bordeaux, 115 Avenue Albert Schweitzer, Pessac 33600, France
| | - Elodie Layan
- CRPP-UMR CNRS 5031, Université de Bordeaux, 115 Avenue Albert Schweitzer, Pessac 33600, France
| | - Emmanuel Picheau
- CRPP-UMR CNRS 5031, Université de Bordeaux, 115 Avenue Albert Schweitzer, Pessac 33600, France
| | - Nicolas Chanut
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, MIT Energy Initiative, 77 Massachussets Avenue, Cambridge, Massachusetts 02139, United States
| | - Frédéric Nallet
- CRPP-UMR CNRS 5031, Université de Bordeaux, 115 Avenue Albert Schweitzer, Pessac 33600, France
| | - Ahmed Bentaleb
- CRPP-UMR CNRS 5031, Université de Bordeaux, 115 Avenue Albert Schweitzer, Pessac 33600, France
| | - Marie-Anne Dourges
- CNRS, Bordeaux INP, ISM, UMR 5255, Université de Bordeaux, 351 Cours de la Libération, Talence Cedex F-33405, France
| | - Roland J Pellenq
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, MIT Energy Initiative, 77 Massachussets Avenue, Cambridge, Massachusetts 02139, United States
| | - Elizabeth A Hillard
- ICMCB-UMR CNRS 5026, Université de Bordeaux, 87 Avenue Albert Schweitzer, Pessac Cedex 33608, France
| | - Thierry Toupance
- CNRS, Bordeaux INP, ISM, UMR 5255, Université de Bordeaux, 351 Cours de la Libération, Talence Cedex F-33405, France
| | - François Dole
- CRPP-UMR CNRS 5031, Université de Bordeaux, 115 Avenue Albert Schweitzer, Pessac 33600, France
| | - Frédéric Louërat
- CRPP-UMR CNRS 5031, Université de Bordeaux, 115 Avenue Albert Schweitzer, Pessac 33600, France
| | - Rénal Backov
- CRPP-UMR CNRS 5031, Université de Bordeaux, 115 Avenue Albert Schweitzer, Pessac 33600, France
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3
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Smeets V, Gaigneaux EM, Debecker DP. Titanosilicate Epoxidation Catalysts: A Review of Challenges and Opportunities. ChemCatChem 2022. [DOI: 10.1002/cctc.202101132] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Valentin Smeets
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain (UCLouvain) Place Louis Pasteur 1, Box L4.01.09 1348 Louvain-la-Neuve Belgium
| | - Eric M. Gaigneaux
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain (UCLouvain) Place Louis Pasteur 1, Box L4.01.09 1348 Louvain-la-Neuve Belgium
| | - Damien P. Debecker
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain (UCLouvain) Place Louis Pasteur 1, Box L4.01.09 1348 Louvain-la-Neuve Belgium
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4
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Development of Photocurable Polyacrylate-Based PolyHIPEs and the Study of the Kinetics of Photopolymerization, and of Their Thermal, Mechanical and Hydrocarbon Absorption Properties. Polymers (Basel) 2021; 13:polym13203497. [PMID: 34685256 PMCID: PMC8538452 DOI: 10.3390/polym13203497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/06/2021] [Accepted: 10/07/2021] [Indexed: 11/17/2022] Open
Abstract
This article describes a comprehensive study to obtain polymeric porous materials via a photopolymerization technique, using acrylate-based high internal phase emulsions (HIPEs), as a template. The aim of obtaining these polymers was to use them as hydrocarbon absorbing materials. Kinetics of photopolymerization of the acrylate monomers and of the HIPEs were conducted to optimize the process. The obtained monoliths were characterized by thermal analysis such as differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The morphology and surface area were analyzed by scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis. The compression properties of the materials were determined, as well as their absorption properties of hydrocarbons such as hexane, diesel, toluene and chloroform. The findings show that the acrylate-HIPEs displayed high reactivity photopolymerizing in 20 min. The glass transition temperature of the materials were in the range of 2 to 83 °C, depending on the ratio of acrylates in the photocurable formulation, displaying the characteristic morphology with voids and interconnecting windows. The polyHIPEs exhibited superior properties of absorption of the studied hydrocarbons. The order of capability of absorption was chloroform > toluene > hexane > diesel. The optimum absorbing material was that with trimethylolpropane triacrylate, ethylhexyl acrylate and isobornyl acrylate in a 1:0.9:2.1 ratio, which absorbed 778% of chloroform, 378% of toluene, 306 % of hexane and 236% of diesel.
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5
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Di-block copolymer stabilized methyl methacrylate based polyHIPEs: Influence of hydrophilic and hydrophobic co-monomers on morphology, wettability and thermal properties. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2019.01.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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6
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Goldhahn C, Taut JA, Schubert M, Burgert I, Chanana M. Enzyme immobilization inside the porous wood structure: a natural scaffold for continuous-flow biocatalysis. RSC Adv 2020; 10:20608-20619. [PMID: 35517771 PMCID: PMC9054300 DOI: 10.1039/c9ra10633b] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 04/17/2020] [Indexed: 12/29/2022] Open
Abstract
Enzymes are often immobilized on solid supports to enable their recovery from reaction solutions, facilitate their reuse and hence increase cost-effectiveness in their application. Immobilized enzymes may even be used for flow-through applications in continuous processes. However, the synthesis of traditional immobilization scaffolds and immobilization techniques lack sustainability as they are often based on fuel-based materials and tedious synthesis- and immobilization approaches. Here, we present the natural material wood as a green alternative for enzyme immobilization. Its natural structure provides a mechanically stable porous scaffold with a high inner surface area that allows for directional flow-through of liquids. Enzymes were immobilized by nanoparticle-mediated adsorption, a simple, versatile and completely water-based process. The resulting wood–enzyme hybrids were intensely investigated for the model enzyme laccase. Reaction kinetics, as well as catalytic activities at various pH-values, temperatures, and ionic strengths were determined. The wood–enzyme hybrids could quickly and completely be removed from the reaction solution. Hence, they allow for multifold reusability. We show a series of 25 consecutive reaction cycles with a remaining activity in the last cycle of 90% of the maximal activity. Moreover, the anisotropic porosity of wood enabled the application of the hybrid material as a biocatalytic flow-through reactor. Flow-rate dependent productivity of a single-enzyme reaction was determined. Moreover, we show a two-step reaction cascade in continuous flow by the immobilization of the enzymes glucose oxidase and horseradish peroxidase. Therefore, the natural material wood proved to be a promising material for application in continuous-flow biocatalysis. Green biocatalytic systems for continuous-flow cascade reactions are realized by enzyme immobilization inside the porous wood structure.![]()
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Affiliation(s)
- Christian Goldhahn
- ETH Zürich
- Institute for Building Materials
- 8093 Zürich
- Switzerland
- Empa – Swiss Federal Laboratories for Material Science and Technology
| | - Josef A. Taut
- ETH Zürich
- Institute for Building Materials
- 8093 Zürich
- Switzerland
| | - Mark Schubert
- ETH Zürich
- Institute for Building Materials
- 8093 Zürich
- Switzerland
- Empa – Swiss Federal Laboratories for Material Science and Technology
| | - Ingo Burgert
- ETH Zürich
- Institute for Building Materials
- 8093 Zürich
- Switzerland
- Empa – Swiss Federal Laboratories for Material Science and Technology
| | - Munish Chanana
- ETH Zürich
- Institute for Building Materials
- 8093 Zürich
- Switzerland
- Empa – Swiss Federal Laboratories for Material Science and Technology
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7
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Ag- and Cu-Promoted Mesoporous Ta-SiO2 Catalysts Prepared by Non-Hydrolytic Sol-Gel for the Conversion of Ethanol to Butadiene. Catalysts 2019. [DOI: 10.3390/catal9110920] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The direct catalytic conversion of bioethanol to butadiene, also known as the Lebedev process, is one of the most promising solution to replace the petro-based production of this important bulk chemical. Considering the intricate reaction mechanism—where a combination of acid-catalyzed dehydration reactions and metal-catalyzed dehydrogenation have to take place simultaneously—tailor-made bifunctional catalysts are required. We propose to use non-hydrolytic sol-gel (NHSG) chemistry to prepare mesoporous Ta-SiO2 materials which are further promoted by Ag via impregnation. An acetamide elimination route is presented, starting from silicon tetraacetate and pentakis(dimethylamido)tantalum(V), in the presence of a Pluronic surfactant. The catalysts display advantageous texture, with specific surface area in the 600–1000 m² g−1 range, large pore volume (0.6–1.0 mL g−1), an average pore diameter of 4 nm and only a small contribution from micropores. Using an array of characterization techniques, we show that NHSG allows achieving a high degree of dispersion of tantalum, mainly incorporated as single sites in the silica matrix. The presence of these monomeric TaOx active sites is responsible for the much higher dehydration ability, as compared to the corresponding catalyst prepared by impregnation of Ta onto a pristine silica support. We attempt to optimize the butadiene yield by changing the relative proportion of Ta and Ag and by tuning the space velocity. We also demonstrate that Ag or Cu can be introduced directly in one step, during the NHSG process. Copper doping is shown to be much more efficient than silver doping to guide the reaction towards the production of butadiene.
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8
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Styskalik A, Abbott JG, Orick MC, Debecker DP, Barnes CE. Synthesis, characterization and catalytic activity of single site, Lewis acidic aluminosilicates. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.11.079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Azhar U, Huyan C, Wan X, Zong C, Xu A, Liu J, Ma J, Zhang S, Geng B. Porous multifunctional fluoropolymer composite foams prepared via humic acid modified Fe3O4 nanoparticles stabilized Pickering high internal phase emulsion using cationic fluorosurfactant as co-stabilizer. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2018.04.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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10
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Azhar U, Huo Z, Yaqub R, Xu A, Zhang S, Geng B. Non-crosslinked fluorinated copolymer particles stabilized Pickering high internal phase emulsion for fabrication of porous polymer monoliths. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.03.068] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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11
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Chen J, Azhar U, Wang Y, Liang J, Geng B. Preparation of fluoropolymer materials with different porous morphologies by an emulsion template method using supercritical carbon dioxide as a medium. RSC Adv 2019; 9:11331-11340. [PMID: 35520270 PMCID: PMC9063414 DOI: 10.1039/c9ra00777f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 04/03/2019] [Indexed: 12/14/2022] Open
Abstract
The choice of a suitable surfactant is key to the formation of a stable water-in-CO2 (W/C) or CO2-in-water (C/W) emulsion. It is even more critical in stabilization of the emulsion containing carbon dioxide (CO2). In this study, the successful preparation of W/C emulsion was achieved by using the amphiphilic block polymer poly(ethylene glycol) methyl ether-b-poly(trifluoroethyl methacrylate) (mPEG45-b-(TFEMA) n ) as a surfactant, in which CO2 was used as a solvent for the fluoromonomer, trifluoroethyl methacrylate (TFEMA). In the case of the W/C emulsion, CO2 and TFEMA were used as the continuous phase and water as the internal phase of the emulsion system. It has been found that in the length of the block polymer mPEG45-b-(TFEMA) n , the fluorine-containing chain end has a significant effect on the morphology of the polymer and the type of emulsion formed. The morphology of the polymer was observed by scanning electron microscopy which confirmed the type of emulsion formed. With the fluorine-containing end segment, the morphology of the polymer changes from a small hollow sphere in a large hollow sphere to a hollow spherical to a porous structure. Correspondingly, it could be concluded that the type of emulsion could go through the process from water-in-CO2-in-water-in-CO2 (W/C/W/C) emulsion to water-in-CO2-in-water (W/C/W) emulsion to water-in-CO2 (W/C) emulsion. Also, suitable co-surfactants were identified in this study. Investigations were also attempted to check the effect of the amount of surfactant, cross-linker and water/CO2 ratio on the type of emulsion formed as well as the morphology of the resultant polymer.
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Affiliation(s)
- Jian Chen
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials China.,School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 China
| | - Umair Azhar
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials China.,School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 China
| | - Yongkang Wang
- Institute of Fluorescent Probes for Biological Imaging, University of Jinan Shandong China .,School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 China
| | - Jihong Liang
- Institute of Fluorescent Probes for Biological Imaging, University of Jinan Shandong China .,School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 China
| | - Bing Geng
- Institute of Fluorescent Probes for Biological Imaging, University of Jinan Shandong China .,School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 China
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12
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Smeets V, van den Biggelaar L, Barakat T, Gaigneaux EM, Debecker DP. Macrocellular Titanosilicate Monoliths as Highly Efficient Structured Olefin Epoxidation Catalysts. ChemCatChem 2019. [DOI: 10.1002/cctc.201900028] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Valentin Smeets
- Institute of Condensed Matter and Nanosciences (IMCN) UCLouvain Place Louis Pasteur, 1, Box L4.01.09 1348 Louvain-la-Neuve Belgium
| | - Ludivine van den Biggelaar
- Institute of Condensed Matter and Nanosciences (IMCN) UCLouvain Place Louis Pasteur, 1, Box L4.01.09 1348 Louvain-la-Neuve Belgium
| | - Tarek Barakat
- Laboratory of Inorganic Materials Chemistry UNamur Rue de Bruxelles, 61 5000 Namur Belgium
| | - Eric M. Gaigneaux
- Institute of Condensed Matter and Nanosciences (IMCN) UCLouvain Place Louis Pasteur, 1, Box L4.01.09 1348 Louvain-la-Neuve Belgium
| | - Damien P. Debecker
- Institute of Condensed Matter and Nanosciences (IMCN) UCLouvain Place Louis Pasteur, 1, Box L4.01.09 1348 Louvain-la-Neuve Belgium
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13
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van den Biggelaar L, Soumillion P, Debecker DP. Biocatalytic transamination in a monolithic flow reactor: improving enzyme grafting for enhanced performance. RSC Adv 2019; 9:18538-18546. [PMID: 35515229 PMCID: PMC9064773 DOI: 10.1039/c9ra02433f] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 06/05/2019] [Indexed: 12/01/2022] Open
Abstract
Transaminases were immobilized onto macrocellular silica monoliths and used for carrying a continuous flow mode transamination reaction. Monoliths were prepared via an emulsion-templated sol–gel method and functionalised by amino-moieties (3-aminopropyl-triethoxysilane, APTES) in order to covalently immobilize the enzymes, using glutaraldehyde as a cross-linking agent. In order to obtain higher performance and improved reproducibility, we investigate the key parameters of APTES functionalisation and of enzyme grafting. Four functionalisation protocols were studied. We show that enhancing the homogeneity of the APTES grafting and controlling the moisture level during functionalisation led to a 3-fold increase in activity as compared to the previously reported data, and greatly improved the reproducibility. Additionally, we report a strong beneficial effect of running the enzyme immobilisation at room temperature instead of 4 °C, further enhancing the obtained activity. Finally, the popular method which consists of stabilizing the covalent attachment of the enzyme by reducing the imine bonds formed between the enzyme and the functionalised surface was investigated. We highlight a strong enzyme deactivation caused by cyanoborohydride, making this strategy irrelevant in this case. The improvements presented here led to more active macrocellular monoliths, of general interest for continuous flow mode biocatalysis. Higher performance can be obtained in flow biocatalytic transamination reactions if the key parameters of support functionalization and of enzyme grafting are controlled.![]()
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Affiliation(s)
| | - Patrice Soumillion
- Louvain Institute of Biomolecular Science and Technology
- UCLouvain
- 1348 Louvain-la-Neuve
- Belgium
| | - Damien P. Debecker
- Institute of Condensed Matter and Nanosciences
- UCLouvain
- 1348 Louvain-la-Neuve
- Belgium
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14
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Lende AB, Bhattacharjee S, Lu WY, Tan CS. Hydrogenation of dioctyl phthalate over a Rh-supported Al modified mesocellular foam catalyst. NEW J CHEM 2019. [DOI: 10.1039/c9nj00404a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The solvent free hydrogenation of DOP to DEHHP over an Al modified MCF supported Rh catalyst.
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Affiliation(s)
- Avinash B. Lende
- Department of Chemical Engineering
- National Tsing Hua University
- Hsinchu
- Republic of China
| | - Saurav Bhattacharjee
- Department of Chemical Engineering
- National Tsing Hua University
- Hsinchu
- Republic of China
| | - Wei-Yuan Lu
- Department of Chemical Engineering
- National Tsing Hua University
- Hsinchu
- Republic of China
| | - Chung-Sung Tan
- Department of Chemical Engineering
- National Tsing Hua University
- Hsinchu
- Republic of China
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15
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Wang Y, Azhar U, He J, Chen H, Zhao J, Pang AM, Geng B. A facile fabrication of porous fluoro-polymer with excellent mechanical properties based on high internal phase emulsion templating using PLA as co-stabilizer. RSC Adv 2019; 9:40513-40522. [PMID: 35542673 PMCID: PMC9076259 DOI: 10.1039/c9ra08226c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 11/30/2019] [Indexed: 11/24/2022] Open
Abstract
The stability of fluoro-high internal phase emulsion (fluoro-HIPE) systems and fluoro-polyHIPEs’ mechanical strength require further improvement to meet the requirements of future applications. In this study, we used polylactic acid (PLA) as a co-stabilizer to improve the stability of the fluoro-polyHIPE. The effects of concentration and molecular weight of PLA on the pores of the fluoro-polyHIPEs were investigated. The addition of PLA produced a porous material with narrower void size distributions, higher specific surface areas and enhanced mechanical properties compared to the fluoro-polyHIPE material without the additive. The resulting fluoro-polyHIPE showed smaller pore sizes (void diameters ranged from 1–3 μm) and an improved hydrophobic nature (contact angle can reach to 148.6°). The crush strength and Young's modulus values can reach 4.42 and 74.07 MPa, respectively, at a PLA addition of 25 wt% (oil phase composition), representing increases of 246% and 650% over fluoro-polyHIPE without PLA addition. The fluoro-poly-HIPE demonstrated excellent mechanical properties compared to many engineering foams, such as melamine, polystyrene, and even graphite foams. Improvements in the performance of porous fluoropolymer materials will be beneficial for many applications, such as chemical adsorption and separation, etc. Effect of PLA on the stability of fluorinated-HIPE and size tuning of the resultant fluoro-polyHIPE with enhanced mechanical properties.![]()
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Affiliation(s)
- Yongkang Wang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Umair Azhar
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Jinxuan He
- Science and Technology on Aerospace Chemical Power Laboratory
- Xiangyang
- China
| | - Huiying Chen
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Jianzhi Zhao
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Ai-Min Pang
- Science and Technology on Aerospace Chemical Power Laboratory
- Xiangyang
- China
| | - Bing Geng
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
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16
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Azhar U, Zong C, Wan X, Xu A, Yabin Z, Liu J, Zhang S, Geng B. Methyl Methacrylate HIPE Solely Stabilized by Fluorinated Di-block Copolymer for Fabrication of Highly Porous and Interconnected Polymer Monoliths. Chemistry 2018; 24:11619-11626. [PMID: 30003616 DOI: 10.1002/chem.201800787] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 05/03/2018] [Indexed: 01/26/2023]
Abstract
Preparation of stable water-in-oil (W/O) high internal phase emulsion (HIPE) containing methyl methacrylate (MMA) monomer as oil phase is a difficult task due to the significant solubility of MMA in water. Here, for the first time a fluorinated di-block copolymer (FDBC) poly (2-dimethylamino)ethylmethacrylate-b-poly (trifluoroethyl methacrylate) (PDMAEMA-b-PTFEMA) is proposed to stabilize HIPEs of MMA without the use of any co-stabilizer or thickening agent. Fluorinated segments in FDBC anchored well at oil/water interface of HIPE, offering high hydrophobicity to the partially hydrophilic MMA monomer and in turn stabilization to MMA-HIPE. By using fluorinated di-block copolymer as stabilizer, highly stable HIPEs can be obtained. In addition, highly interconnected porous monoliths were obtained after free radical polymerization, which are highly desirable materials in various practical applications including tissue engineering scaffolds, separation science, bio-engineering and so on. The as-prepared MMA-HIPEs possess high thermal stability without phase separation. The textural characteristics of as-prepared composites, such as pore size and distribution, can be easily controlled by simply varying the amount of FDBC and/or dispersed phase fraction. Moreover, the influence of di-block concentration on water uptake (WU) capability of the prepared porous monoliths is explored.
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Affiliation(s)
- Umair Azhar
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, Shandong Engineering Research center for Fluorinated Materials, University of Jinan, Jinan, 250022, China
| | - Chuanyong Zong
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, Shandong Engineering Research center for Fluorinated Materials, University of Jinan, Jinan, 250022, China
| | - Xiaozheng Wan
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, Shandong Engineering Research center for Fluorinated Materials, University of Jinan, Jinan, 250022, China
| | - Anhou Xu
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, Shandong Engineering Research center for Fluorinated Materials, University of Jinan, Jinan, 250022, China
| | - Zhang Yabin
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, Shandong Engineering Research center for Fluorinated Materials, University of Jinan, Jinan, 250022, China
| | - Jitao Liu
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, Shandong Engineering Research center for Fluorinated Materials, University of Jinan, Jinan, 250022, China
| | - Shuxiang Zhang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, Shandong Engineering Research center for Fluorinated Materials, University of Jinan, Jinan, 250022, China
| | - Bing Geng
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, Shandong Engineering Research center for Fluorinated Materials, University of Jinan, Jinan, 250022, China
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17
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Debecker DP, Le Bras S, Boissière C, Chaumonnot A, Sanchez C. Aerosol processing: a wind of innovation in the field of advanced heterogeneous catalysts. Chem Soc Rev 2018; 47:4112-4155. [DOI: 10.1039/c7cs00697g] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Aerosol processing technologies represent a major route of innovation in the mushrooming field of heterogeneous catalysts preparation.
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Affiliation(s)
- Damien P. Debecker
- Université catholique de Louvain
- Institute of Condensed Matter and Nanosciences
- 1348 Louvain-La-Neuve
- Belgium
| | - Solène Le Bras
- Université catholique de Louvain
- Institute of Condensed Matter and Nanosciences
- 1348 Louvain-La-Neuve
- Belgium
| | - Cédric Boissière
- Sorbonne Université
- Collège de France
- PSL University
- CNRS
- Laboratoire de Chimie de La Matière Condensée de Paris LCMCP
| | | | - Clément Sanchez
- Sorbonne Université
- Collège de France
- PSL University
- CNRS
- Laboratoire de Chimie de La Matière Condensée de Paris LCMCP
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18
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Wan X, Azhar U, Wang Y, Chen J, Xu A, Zhang S, Geng B. Highly porous and chemical resistive P(TFEMA–DVB) monolith with tunable morphology for rapid oil/water separation. RSC Adv 2018; 8:8355-8364. [PMID: 35542035 PMCID: PMC9078523 DOI: 10.1039/c8ra00501j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 02/12/2018] [Indexed: 11/27/2022] Open
Abstract
A facile preparation for a series of porous poly(2,2,2-trifluoroethylmethacrylate–divinylbenzene) P(TFEMA–DVB) foams is discussed in this paper. The foams have adjustable morphology utilizing a suitable commercial surfactant, Hypermer B246, as stabilizer, and were compared with traditional organic surfactants or macromolecular block-polymers. Combining the porous properties and advantages of fluorine atoms, this type of fluoropolymer exhibited superb chemical stability and hydrophobicity performances with high porosity. These porous fluoro-monoliths preserved their regular porous structure without any degradation after immersion into strong acidic or basic solution for three days, hence demonstrating an excellent potential to deal with environmental pollution caused by oil spillages in severe environments. The tunable morphology (open and closed pores) and pore sizes were achieved by investigating various parameters like surfactant concentration, amount of external crosslinker, and aqueous phase volume. Droplet sizes of HIPEs were characterized using an optical microscope under different experimental conditions. The influence of pore structure and surface properties of polyHIPE on water contact angle and oil adsorption capacity was also explored. The results indicated that the porous material has an excellent oleophilicity and hydrophobicity, with water contact angles (WCA) up to 146.4°. Additionally, the results presented a noticeable adsorption with a very fast rate towards organic oils from either a water surface or bottom with adsorption saturation achieved in about 120 s. The prepared polyHIPEs showed a good recycling ability; even after 10 adsorption–centrifugation experiments, the adsorption capacity was still more than 85%. A facile preparation for a series of porous poly(2,2,2-trifluoroethylmethacrylate–divinylbenzene) P(TFEMA–DVB) foams is discussed in this paper.![]()
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Affiliation(s)
- Xiaozheng Wan
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Umair Azhar
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Yongkang Wang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Jian Chen
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Anhou Xu
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Shuxiang Zhang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Bing Geng
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
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19
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Debecker DP. Innovative Sol-Gel Routes for the Bottom-Up Preparation of Heterogeneous Catalysts. CHEM REC 2017; 18:662-675. [PMID: 29227031 DOI: 10.1002/tcr.201700068] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 11/21/2017] [Indexed: 12/12/2022]
Abstract
Heterogeneous catalysts can be prepared by different methods offering various levels of control on the final properties of the solid. In this account, we exemplify bottom-up preparation routes that are based on the sol-gel chemistry and allow to tailor some decisive properties of solid catalysts. First, an emulsion templating strategy is shown to lead to macrocellular self-standing monoliths with a macroscopic 3D structure. The latter can be used as catalyst or catalyst supports in flow chemistry, without requiring any subsequent shaping step. Second, the aerosol-assisted sol-gel process allows for the one-step and continuous production of porous mixed oxides. Tailored textural properties can be obtained together with an excellent control on composition and homogeneity. Third, the application of non-hydrolytic sol-gel routes, in the absence of water, leads to mixed oxides with outstanding textural properties and with peculiar surface chemistry. In all cases, the resulting catalytic performance can be correlated with the specificities of the preparation routes presented. This is exemplified in catalytic reactions in the fields of biomass conversion, petro chemistry, enantioselective organic synthesis, and air pollution mitigation.
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Affiliation(s)
- Damien P Debecker
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Place Louis Pasteur, 1 box L4.01.09
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20
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Roucher A, Depardieu M, Pekin D, Morvan M, Backov R. Inorganic, Hybridized and Living Macrocellular Foams: "Out of the Box" Heterogeneous Catalysis. CHEM REC 2017; 18:776-787. [PMID: 29194938 DOI: 10.1002/tcr.201700075] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 11/14/2017] [Indexed: 11/10/2022]
Abstract
With this personal account we show how the Integrative Chemistry, when combining the sol-gel process and concentrated emulsions, allows to trigger inorganic, hybrid or living materials when dedicated toward heterogeneous catalysis applications. In here we focus on 3D-macrocellular monolithic foams bearing hierarchical porosities and applications thereof toward heterogeneous catalysis where both activities and mass transport are enhanced. We thereby first depict the general background of emulsions, focusing on concentrated ones, acting as soft templates for the design of solid (HIPE) foams, HIPE being the acronym for High Internal Phase Emulsions while encompassing both sol-gel and polymer chemistry. Secondly we extend this approach toward the design of inorganic cellular materials labeled Si(HIPE) and hybrid organic-inorganic foams, labeled Organo-Si(HIPE), where heterogeneous catalysis applications are addressed considering acidic, metallic, enzymatic and bacterial-based modified Si-HIPE. Along, we will show how the fluid hydrodynamic within the macrocellular foams is offering advanced "out of the box" heterogeneous catalytic capabilities.
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Affiliation(s)
- Armand Roucher
- Université de Bordeaux, CRPP-UPR CNRS 8641 115 Avenue Albert Schweitzer, 33600, Pessac, FRANCE
| | - Martin Depardieu
- Université de Bordeaux, CRPP-UPR CNRS 8641 115 Avenue Albert Schweitzer, 33600, Pessac, FRANCE
| | - Deniz Pekin
- Université de Bordeaux, CRPP-UPR CNRS 8641 115 Avenue Albert Schweitzer, 33600, Pessac, FRANCE
| | - Mickaël Morvan
- Université de Bordeaux, CRPP-UPR CNRS 8641 115 Avenue Albert Schweitzer, 33600, Pessac, FRANCE
| | - Rénal Backov
- Université de Bordeaux, CRPP-UPR CNRS 8641 115 Avenue Albert Schweitzer, 33600, Pessac, FRANCE.,Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
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21
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Godard N, Vivian A, Fusaro L, Cannavicci L, Aprile C, Debecker DP. High-Yield Synthesis of Ethyl Lactate with Mesoporous Tin Silicate Catalysts Prepared by an Aerosol-Assisted Sol-Gel Process. ChemCatChem 2017. [DOI: 10.1002/cctc.201601637] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Nicolas Godard
- Unit of Nanomaterial Chemistry; University of Namur; Department of Chemistry; 5000 Namur Belgium
| | - Alvise Vivian
- Unit of Nanomaterial Chemistry; University of Namur; Department of Chemistry; 5000 Namur Belgium
| | - Luca Fusaro
- Unit of Nanomaterial Chemistry; University of Namur; Department of Chemistry; 5000 Namur Belgium
| | - Lorenzo Cannavicci
- Institute of Condensed Matter and Nanoscience; Université catholique de Louvain; Place Louis Pasteur, 1 box L4.01.09 1348 Louvain-la-Neuve Belgium
| | - Carmela Aprile
- Unit of Nanomaterial Chemistry; University of Namur; Department of Chemistry; 5000 Namur Belgium
| | - Damien P. Debecker
- Institute of Condensed Matter and Nanoscience; Université catholique de Louvain; Place Louis Pasteur, 1 box L4.01.09 1348 Louvain-la-Neuve Belgium
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22
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Enantioselective Transamination in Continuous Flow Mode with Transaminase Immobilized in a Macrocellular Silica Monolith. Catalysts 2017. [DOI: 10.3390/catal7020054] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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23
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Zhang Y, Peng J, Du G, Zhang H, Fang Y. An economic and environmentally benign approach for the preparation of monolithic silica aerogels. RSC Adv 2016. [DOI: 10.1039/c6ra21050c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
One step sol–gel reaction, followed by solvent exchange free ambient pressure drying resulted in various monolithic silica aerogels from super-hydrophobic to hydrophilic with densities as low as 0.026 g cm−3 and thermal conductivities lower than air.
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Affiliation(s)
- Yuanyuan Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
| | - Junxia Peng
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
| | - Guanqun Du
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
| | - Hongxia Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
| | - Yu Fang
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
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