1
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Man Y, Li S, Diao Q, Lee YI, Liu HG. PS-b-PAA/Cu two-dimensional nanoflowers fabricated at the liquid/liquid interface: A highly active and robust heterogeneous catalyst. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.03.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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2
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Fabricating highly catalytically active block copolymer/metal nanoparticle microstructures at the liquid/liquid interface. J Colloid Interface Sci 2018; 522:272-282. [DOI: 10.1016/j.jcis.2018.03.071] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 03/21/2018] [Accepted: 03/21/2018] [Indexed: 12/15/2022]
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3
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Zhang X, Zhang Y, Zhang X, Li S, Huang Y. Nitrogen rich core-shell magnetic mesoporous silica as an effective adsorbent for removal of silver nanoparticles from water. JOURNAL OF HAZARDOUS MATERIALS 2017; 337:1-9. [PMID: 28501638 DOI: 10.1016/j.jhazmat.2017.04.053] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 04/10/2017] [Accepted: 04/11/2017] [Indexed: 05/26/2023]
Abstract
The production and increasing use of silver nanoparticles (AgNPs) obviously results in their release into the environment, leading to a risk to the environment due to their toxic effects. Thus, the removal of AgNPs from water is highly needed. Here, we demonstrate that nitrogen rich (∼10% nitrogen content) core-shell magnetic mesoporous silica is a promising adsorbent for the removal of AgNPs. For this, the poly(ethylenimine) functionalized core-shell magnetic mesoporous silica composites (Fe3O4@SiO2-PEI) were prepared, and characterized by TEM, FT-IR, XRD, TG and N2 adsorption-desorption. The removal of AgNPs by Fe3O4@SiO2-PEI as a function of contact time, concentration of AgNPs, solution pH and ionic strength were studied. The adsorption kinetic data could be described by the pseudo-second-order rate model. Both Langmuir and Freundlich models fitted the adsorption data well. The adsorption capacity for AgNPs is 909.1mg/g, which is 5-181 times higher than that of the previously reported adsorbents for AgNPs. Interestingly, the silver adsorbed onto Fe3O4@SiO2-PEI exhibits highly catalytic activity for 4-nitropheol (4-NP) reduction with a rate constant of 0.072min-1, which is much higher than those by other AgNPs reported before. The silver-loaded Fe3O4@SiO2-PEI promises good recyclability for at least five cycles, showing great potential in practical applications.
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Affiliation(s)
- Xiaoye Zhang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yao Zhang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Xiaodan Zhang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Siqi Li
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yuming Huang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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4
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Kumar Sahoo P, Panigrahy B, Thakur D, Bahadur D. Ice-templating synthesis of macroporous noble metal/3D-graphene nanocomposites: their fluorescence lifetimes and catalytic study. NEW J CHEM 2017. [DOI: 10.1039/c7nj00128b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Porous architectures of 3D-graphene assembled with noble metal (Au, Pd and Pt) nanoparticles were successfully fabricated through a one-step green route using a low-cost freeze-casting method.
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Affiliation(s)
- Prasanta Kumar Sahoo
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Powai
- India
- Centre for Nano Science and Nano Technology
| | - Bharati Panigrahy
- Solid State and Structural Chemistry Unit
- Indian Institute of Science
- Bangalore
- India
| | - Dinbandhu Thakur
- Centre for Nano Science and Nano Technology
- Siksha ‘O’ Anusandhan University
- Bhubaneswar 751030
- India
| | - Dhirendra Bahadur
- Centre for Nano Science and Nano Technology
- Siksha ‘O’ Anusandhan University
- Bhubaneswar 751030
- India
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5
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Zhao X, Wang Q, Zhang X, Lee YI, Liu HG. Influence of gold species (AuCl4−and AuCl2−) on self-assembly of PS-b-P2VP in solutions and morphology of composite thin films fabricated at the air/liquid interfaces. Phys Chem Chem Phys 2016; 18:1945-52. [DOI: 10.1039/c5cp06267e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new and facile approach was developed to fabricate functional composite films of block copolymers at the air/liquid interface through a self-emulsification, self-assembly and adsorption process.
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Affiliation(s)
- Xingjuan Zhao
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
| | - Qian Wang
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
| | - Xiaokai Zhang
- College of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- P. R. China
| | - Yong-Ill Lee
- Anastro Laboratory
- Department of Chemistry
- Changwon National University
- Changwon 641-773
- Korea
| | - Hong-Guo Liu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
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6
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Liu M, Geng Y, Wang Q, Lee YI, Hao J, Liu HG. Unique self-assembly behavior of amphiphilic block copolymers at liquid/liquid interfaces. RSC Adv 2015. [DOI: 10.1039/c4ra13281e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Various microstructures of amphiphilic block copolymers were fabricated at the liquid/liquid interfaces.
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Affiliation(s)
- Mei Liu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
| | - Yuanyuan Geng
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
| | - Qian Wang
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
| | - Yong-Ill Lee
- Anastro Laboratory
- Department of Chemistry
- Changwon National University
- Changwon 641-773
- Korea
| | - Jingcheng Hao
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
| | - Hong-Guo Liu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
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7
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Wang Q, Zhao X, Lee YI, Liu HG. A new and facile way to fabricate catalytically active block copolymer/Au nanoparticle multilayer thin films at the air/liquid interface. RSC Adv 2015. [DOI: 10.1039/c5ra16370f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A catalytically active multilayer film of PB-b-P2VP doped with Au nanoparticles was fabricated through liquid/liquid interfacial mass transfer, self-assembly in an aqueous phase and adsorption at the air/liquid interface.
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Affiliation(s)
- Qian Wang
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
| | - Xingjuan Zhao
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
| | - Yong-Ill Lee
- Anastro Laboratory
- Department of Chemistry
- Changwon National University
- Changwon 641-773
- Korea
| | - Hong-Guo Liu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Shandong University
- Jinan 250100
- P. R. China
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8
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Hong M, Geng Y, Liu M, Xu Y, Lee YI, Hao J, Liu HG. Emulsion-directed liquid/liquid interfacial fabrication of lanthanide ion-doped block copolymer composite thin films. J Colloid Interface Sci 2015; 438:212-219. [DOI: 10.1016/j.jcis.2014.09.085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 09/24/2014] [Accepted: 09/28/2014] [Indexed: 11/17/2022]
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9
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Liu M, Wang Q, Geng Y, Wang C, Lee YI, Hao J, Liu HG. Liquid/Liquid interfacial fabrication of thermosensitive and catalytically active Ag nanoparticle-doped block copolymer composite foam films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:10503-10512. [PMID: 25110832 DOI: 10.1021/la502738j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An aqueous solution of AgNO3 (upper phase) and a DMF/CHCl3 solution of polystyrene-b-poly(acryl acid)-b-polystyrene (PS-b-PAA-b-PS) or PS-b-PAA-b-PS/1,6-diaminohexane (DAH) (lower phase) constituted a planar liquid/liquid interface. The lower phase gradually transformed to a water-in-oil (W/O) emulsion via spontaneous emulsification due to the "ouzo effect". Polymer molecules, DAH molecules, and Ag(+) ions assembled into microcapsules around emulsion droplets that adsorbed at the planar liquid/liquid interface, resulting in formation of a foam film. DAH acted as a cross-linker during this process. Transmission electron microscopic observations indicated that Ag nanoclusters that were generated through reduction of Ag(+) ions by DMF were homogeneously dispersed in the walls of the foam structure. X-ray photoelectron spectroscopic investigations revealed that Ag(I) and Ag(0) coexisted in the film, and Ag(I) transformed to Ag(0) after further treatment. The film formed without DAH was not stable, while the film formed with DAH was very stable due to intermolecular attraction between PAA and DAH and formation of amides, as revealed by FTIR spectra. The film formed with DAH exhibited high and durable catalytic activity for hydrogenation of nitro compounds and, very interestingly, exhibited thermoresponsive catalytic behavior.
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Affiliation(s)
- Mei Liu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University , Jinan 250100, P. R. China
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10
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Geng Y, Liu M, Tong K, Xu J, Lee YI, Hao J, Liu HG. Fabrication of composite polymer foam films at the liquid/liquid interface through emulsion-directed assembly and adsorption processes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:2178-2187. [PMID: 24520807 DOI: 10.1021/la500187d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The foam films of polystyrene-b-poly(acrylic acid)-b-polystyrene (PS-b-PAA-b-PS) doped with Cd(II) or Pb(II) species were fabricated at the planar liquid/liquid interfaces between a DMF/chloroform (v/v: 1/1) solution of the polymer and aqueous solutions containing cadmium acetate or lead acetate at ambient temperature. Optical microscopic observation shows the thin film is uniform on a larger length scale. Transmission electron microscopic (TEM) investigations reveal that the foam films are made up of microcapsules with the size of several hundreds of nanometers to micrometers. The walls of the microcapsules have a layered structure decorating with nanofibers and hollow nanospheres, where numerous inorganic fine nanoparticles are dispersed homogeneously. The film formation is a result of emulsion droplet-templated assembly and adsorption of the formed microcapsules at the planar liquid/liquid interface. Because of the miscibility of DMF with chloroform and water, DMF migrates to the aqueous phase while water migrates to the organic phase across the interface, resulting in the formation of a W/O emulsion, as revealed by optical microscopic observation, freeze fracture transmission electron microscopic (FF-TEM) observation, and dynamic laser scattering (DLS) investigation. The triblock copolymer molecules and the inorganic species adsorb and self-assemble around the emulsion drops, leading to the formation of the composite microcapsules. X-ray photoelectron spectroscopic (XPS) and FTIR spectroscopic results indicate that two kinds of Cd(II) or Pb(II) species, metal oxide or hydroxide, resulting from the hydrolysis of the metal ions and the coordinated metal ions to the carboxyl groups coexist in the formed thin films, which transform to metal sulfide completely after treating with hydrogen sulfide to get metal sulfide nanoparticle-doped polymer thin films.
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Affiliation(s)
- Yuanyuan Geng
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University , Jinan 250100, P. R. China
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11
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Liu Y, Chen L, Geng Y, Lee YI, Li Y, Hao J, Liu HG. Fabrication of composite thin films with microstructures of honeycomb, foam, and nanosphere arrays through adsorption and self-assembly of block copolymers at the liquid/liquid interface. J Colloid Interface Sci 2013; 407:225-35. [DOI: 10.1016/j.jcis.2013.06.056] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 06/15/2013] [Accepted: 06/19/2013] [Indexed: 10/26/2022]
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12
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Catalytic polymer/copper composite thin films formed at the liquid/liquid interface through self-assembly and hydrolysis process. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.04.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Wang D, Ma H, Chu C, Hao J, Liu HG. Honeycomb-like thin films of Polystyrene-block-poly(2-vinylpyridine) embedded with gold or silver nanoparticles formed at the planer liquid/liquid interface. J Colloid Interface Sci 2013; 402:75-85. [DOI: 10.1016/j.jcis.2013.03.055] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 03/17/2013] [Accepted: 03/20/2013] [Indexed: 11/25/2022]
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14
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Fu H, Yang X, Jiang X, Yu A. Bimetallic Ag-Au nanowires: synthesis, growth mechanism, and catalytic properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:7134-7142. [PMID: 23679079 DOI: 10.1021/la400753q] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Silver-gold (Ag-Au) bimetallic nanowires were controllably synthesized by a newly developed wet-chemical method at room temperature. The Ag nanowires and Au nanoparticles were sequentially formed by reduction with vanadium oxide (V2O3) nanoparticles so as to form Ag-Au bimetal, in which the Ag nanowires show a diameter of ~20 nm and length up to 10 μm. A few unique features were noted in our new approach: it was rapid (within a few minutes), controllable in shape and size, reproducible, and there was no need for any surface modifiers. The formation and growth mechanisms of these Ag-Au bimetallic nanostructures driven by lattice match and a unique reducing agent (V2O3) have been proposed in this study. Moreover, the application of such bimetallic nanoparticles for catalytic reduction of 4-nitrophenol to 4-aminophenol was performed, and they exhibit catalytic properties superior to those of the Ag nanowires, Au nanoparticles, and Ag-Pd bimetallic nanostructures prepared under the reported conditions. These Ag-Au bimetallic nanoparticles have potential to be highly efficient catalysts for the reduction of 4-nitrophenol. This study may lead to new path for the generation of other bimetallic nanostructures with excellent catalytic efficiency.
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Affiliation(s)
- Haitao Fu
- School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
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15
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Free-standing poly(2-vinylpyridine) foam films doped with silver nanoparticles formed at the planar liquid/liquid interface. J Colloid Interface Sci 2013; 394:223-30. [DOI: 10.1016/j.jcis.2012.12.041] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Revised: 12/09/2012] [Accepted: 12/12/2012] [Indexed: 11/13/2022]
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16
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Liu J, Wu Q, Huang F, Zhang H, Xu S, Huang W, Li Z. Facile preparation of a variety of bimetallic dendrites with high catalytic activity by two simultaneous replacement reactions. RSC Adv 2013. [DOI: 10.1039/c3ra41268g] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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17
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Yang MQ, Pan X, Zhang N, Xu YJ. A facile one-step way to anchor noble metal (Au, Ag, Pd) nanoparticles on a reduced graphene oxide mat with catalytic activity for selective reduction of nitroaromatic compounds. CrystEngComm 2013. [DOI: 10.1039/c3ce40694f] [Citation(s) in RCA: 151] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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