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Nanoconjugates based on a novel organic-inorganic hybrid silsesquioxane and gold nanoparticles as hemocompatible nanomaterials for promising biosensing applications. Colloids Surf B Biointerfaces 2022; 213:112355. [PMID: 35158220 DOI: 10.1016/j.colsurfb.2022.112355] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 11/22/2021] [Accepted: 01/20/2022] [Indexed: 12/15/2022]
Abstract
A new hybrid organic-inorganic silsesquioxane material, 3-n-propyl(2-amino-4-methyl)pyridium chloride (SiAMPy+Cl-), was synthesized and successfully applied for the synthesis of stable nanoconjugates with gold nanoparticles (AuNPs-SiAMPy+). SiAMPy+Cl- was obtained through a simple sol-gel procedure by using chloropropyltrimetoxysilane and tetraethylorthosilicate as precursors and 2-amino-4-methylpyridine as the functionalizing agent. The resulting material was characterized by employing FTIR, XRD, and 1H-, 13C-, and 29Si-NMR spectroscopy. The synthesis of AuNPs-SiAMPy+ nanoconjugates was optimized through a 23 full factorial design. UV-VIS, FTIR, TEM, DLS, and ζ-potential measurements were used to characterize the nanoconjugates, which presented a spherical morphology with an average diameter of 5.8 nm. To investigate the existence of toxic effects of AuNPs-SiAMPy+ on blood cells, which is essential for their future biomedical applications, toxicity assays on human erythrocytes and leukocytes were performed. Interestingly, no cytotoxic effects were observed for both types of cells. The nanoconjugates were further applied in the construction of electrochemical immunosensing devices, aiming the detection of anti-Trypanosoma cruzi antibodies in serum as biomarkers of Chagas disease. The AuNPs-SiAMPy+ significantly enhanced the sensitivity of the biodevice, which was able to discriminate between anti-T. cruzi positive and negative serum samples. Thus, the AuNPs-SiAMPy+-based biosensor showed great potential to be used as a new tool to perform fast and accurate diagnosis of Chagas disease. The promising findings described herein strongly confirm the remarkable potential of SiAMPy+Cl- to obtain nanomaterials, which can present notable biomedical properties and applications.
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Han X, Guo Y, Cai H, Li X, Ding J, Zhao X, Zhou H, Guo W, Huang W, Zhao T. Synergistic effects of a half‐cage and cage structure phosphorus and nitrogen‐containing
POSS
with tetrabutyl titanate on flame retardancy of vinyl epoxy resins. J Appl Polym Sci 2022. [DOI: 10.1002/app.52342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Xu Han
- Key Laboratory of Science and Technology on High‐Tech Polymer Materials Institute of Chemistry, Chinese Academy of Science Beijing China
| | - Ying Guo
- Key Laboratory of Science and Technology on High‐Tech Polymer Materials Institute of Chemistry, Chinese Academy of Science Beijing China
| | - Huanhuan Cai
- Luoyang Ship Material Research Institute Luoyang Henan Province China
| | - Xiang Li
- Luoyang Ship Material Research Institute Luoyang Henan Province China
| | - Jiangnan Ding
- Key Laboratory of Science and Technology on High‐Tech Polymer Materials Institute of Chemistry, Chinese Academy of Science Beijing China
| | - Xiaojuan Zhao
- Key Laboratory of Science and Technology on High‐Tech Polymer Materials Institute of Chemistry, Chinese Academy of Science Beijing China
| | - Heng Zhou
- Key Laboratory of Science and Technology on High‐Tech Polymer Materials Institute of Chemistry, Chinese Academy of Science Beijing China
| | - Wantao Guo
- Luoyang Ship Material Research Institute Luoyang Henan Province China
| | - Wei Huang
- Key Laboratory of Science and Technology on High‐Tech Polymer Materials Institute of Chemistry, Chinese Academy of Science Beijing China
| | - Tong Zhao
- Key Laboratory of Science and Technology on High‐Tech Polymer Materials Institute of Chemistry, Chinese Academy of Science Beijing China
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Alsaiari M, Saleem A, Alsaiari R, Muhammad N, Latif U, Tariq M, Almohana A, Rahim A. SiO 2/Al 2O 3/C grafted 3-n propylpyridinium silsesquioxane chloride-based non-enzymatic electrochemical sensor for determination of carcinogenic nitrite in food products. Food Chem 2022; 369:130970. [PMID: 34500207 DOI: 10.1016/j.foodchem.2021.130970] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 08/02/2021] [Accepted: 08/25/2021] [Indexed: 12/19/2022]
Abstract
The excessive uptake of nitrite is perilous and detrimental for human health that prone to cancer disease. Herein, described the synthesis of SiO2/Al2O3/C material through the sol-gel procedure followed by grafting with 3-n propylpyridinium silsesquioxane chloride organic ligand for enhancing electrochemical activity. H-NMR, 13C NMR, and 29Si studies were performed for confirmation of surface functionalization through the grafting technique. The surface morphology was evaluated through SEM and TEM techniques. The material showed an irregular and flakes-like structure that exhibited more compactness and conglomerate structure with no segregation in phase was observed after grafting. The elemental composition was confirmed from EDX analysis. The electrochemical measurements were performed with cyclic voltammetry, electrochemical impedance spectroscopy (EIS), and chronoamperometry. The prepared hybrid inorganic-organic composite Si/C/Al/SiPy+Cl- was applied for the modification of the glassy carbon (GC) electrode and assessed as a sensor for nitrite determination. The sensor showed the low limit of detection (0.01 μM), low limit of quantification (0.08 μM), wide linear response range (0.2-280 μM), and high sensitivity (410 μA·μM-1). It gave a quick response time of <1 s in the presence of 70 μM nitrite. The fabricated sensor showed high sensitivity, chemical stability, and insignificant interference from co-existing species present in sausage meat and food industry discharges. The repeatability of the sensor was evaluated as 2.5 % R.S.D.; for n = 10 at 50 μM nitrite.
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Affiliation(s)
- Mabkhoot Alsaiari
- Promising Centre for sensors and electronic devices (PCSED), Advanced materials and Nano Research Centre, Najran University, Najran, 11001, Saudi Arabia; Empty Quarter Research Unit, Department of Chemistry, Faculty of Science and Arts at Sharurah, Najran University, Najran, Saudi Arabia.
| | - Amina Saleem
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road Lahore, 54000, Pakistan
| | - Raiedhah Alsaiari
- Promising Centre for sensors and electronic devices (PCSED), Advanced materials and Nano Research Centre, Najran University, Najran, 11001, Saudi Arabia; Empty Quarter Research Unit, Department of Chemistry, Faculty of Science and Arts at Sharurah, Najran University, Najran, Saudi Arabia
| | - Nawshad Muhammad
- Department of Dental Materials, Institute of Basic Medical Sciences, Khyber Medical University KPK, Pakistan
| | - Usman Latif
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road Lahore, 54000, Pakistan
| | - Muhammad Tariq
- National Centre of Excellence in Physical Chemistry, University of Peshawar, Pakistan
| | - Abdulaziz Almohana
- Department of Civil Engineering, College of Engineering, King Saud University, P.O.BOX 800, Riyadh, 11421, Saudi Arabia
| | - Abdur Rahim
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road Lahore, 54000, Pakistan.
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Han X, Zhang X, Guo Y, Liu X, Zhao X, Zhou H, Zhang S, Zhao T. Synergistic Effects of Ladder and Cage Structured Phosphorus-Containing POSS with Tetrabutyl Titanate on Flame Retardancy of Vinyl Epoxy Resins. Polymers (Basel) 2021; 13:polym13091363. [PMID: 33921920 PMCID: PMC8122454 DOI: 10.3390/polym13091363] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/12/2021] [Accepted: 04/15/2021] [Indexed: 11/24/2022] Open
Abstract
The cage and ladder structured phosphorus-containing polyhedral oligomeric silsesquioxanes (DOPO-POSS) have been synthesized through the hydrolytic condensation of 9,10-dihydro-9-oxa-10-phosphenanthrene-10-oxide (DOPO)-vinyl triethoxysilane (VTES). The unique ladder and cage–ladder structured components in DOPO-POSS endowed it with good solubility in vinyl epoxy resin (VE), and it was used with tetrabutyl titanate (TBT) to construct a phosphorus-silicon-titanium synergy system for the flame retardation of VE. Thermal stabilities, mechanical properties, and flame retardancy of the resultant VE composites were investigated by thermal gravimetric analysis (TGA), dynamic mechanical analysis (DMA), three-point bending tests, limiting oxygen index (LOI) measurement, and cone calorimetry. The experimental results showed that with the addition of only 4 wt% DOPO-POSS and 0.5 wt% TBT, the limiting oxygen index value (LOI) increased from 19.5 of pure VE to 24.2. With the addition of DOPO-POSS and TBT, the peak heat release rate (PHRR), total heat release (THR), smoke production rate (SPR), and total smoke production (TSP) were decreased significantly compared to VE-0. In addition, the VE composites showed improved thermal stabilities and mechanical properties comparable to that of the VE-0. The investigations on pyrolysis volatiles of cured VE further revealed that DOPO-POSS and TBT exerted flame retardant effects in gas phase. The results of char residue of the VE composites by SEM and XPS showed that TBT and DOPO-POSS can accelerate the char formation during the combustion, forming an interior char layer with the honeycomb cavity structure and dense exterior char layer, making the char strong with the formation of Si-O-Ti and Ti-O-P structures.
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Affiliation(s)
- Xu Han
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
- Key Laboratory of Science and Technology on High-Tech Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (Y.G.); (X.L.); (T.Z.)
| | - Xiaohua Zhang
- School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
| | - Ying Guo
- Key Laboratory of Science and Technology on High-Tech Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (Y.G.); (X.L.); (T.Z.)
| | - Xianyuan Liu
- Key Laboratory of Science and Technology on High-Tech Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (Y.G.); (X.L.); (T.Z.)
| | - Xiaojuan Zhao
- Key Laboratory of Science and Technology on High-Tech Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (Y.G.); (X.L.); (T.Z.)
- Correspondence: (X.Z.); (H.Z.); (S.Z.)
| | - Heng Zhou
- Key Laboratory of Science and Technology on High-Tech Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (Y.G.); (X.L.); (T.Z.)
- Correspondence: (X.Z.); (H.Z.); (S.Z.)
| | - Songli Zhang
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
- Correspondence: (X.Z.); (H.Z.); (S.Z.)
| | - Tong Zhao
- Key Laboratory of Science and Technology on High-Tech Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (Y.G.); (X.L.); (T.Z.)
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Khristenko I, Panteleimonov A, Iliashenko RY, Doroshenko A, Ivanov V, Tkachenko O, Benvenutti E, Kholin YV. Heterogeneous polarity and surface acidity of silica-organic materials with fixed 1-n-propyl-3-methylimidazolium chloride as probed by solvatochromic and fluorescent dyes. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.11.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Winiarski JP, de Barros MR, Magosso HA, Jost CL. Electrochemical reduction of sulfite based on gold nanoparticles/silsesquioxane-modified electrode. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.08.171] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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7
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Tshishimbi Muya J, Ceulemans A, Gopakumar G, Parish CA. Jahn-Teller distortion in polyoligomeric silsesquioxane (POSS) cations. J Phys Chem A 2015; 119:4237-43. [PMID: 25831095 DOI: 10.1021/acs.jpca.5b01787] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We investigated the symmetry breaking mechanism in cubic octa-tert-butyl silsesquioxane and octachloro silsesquioxane monocations (Si8O12(C(CH3)3)8(+) and Si8O12Cl8(+)) using density functional theory (DFT) and group theory. Under Oh symmetry, these ions possess (2)T2g and (2)Eg electronic states and undergo different symmetry breaking mechanisms. The ground states of Si8O12(C(CH3)3)8(+) and Si8O12Cl8(+) belong to the C3v and D4h point groups and are characterized by Jahn-Teller stabilization energies of 3959 and 1328 cm(-1), respectively, at the B3LYP/def2-SVP level of theory. The symmetry distortion mechanism in Si8O12Cl8(+) is Jahn-Teller type, whereas in Si8O12(C(CH3)3)8(+) the distortion is a combination of both Jahn-Teller and pseudo-Jahn-Teller effects. The distortion force acting in Si8O12(C(CH3)3)8(+) is mainly localized on one Si-(tert-butyl) group, while in Si8O12Cl8(+) it is distributed over the oxygen atoms. The main distortion forces acting on the Si8O12 core arise from the coupling between the electronic state and the vibrational modes, identified as 9t2g + 1eg + 3a2u for the Si8O12(C(CH3)3)8(+) and 1eg + 2eg for Si8O12Cl8(+).
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Affiliation(s)
- Jules Tshishimbi Muya
- †Department of Chemistry, University of Richmond, Richmond, Virginia 23173, United States
| | - Arnout Ceulemans
- ‡Department of Chemistry, University of Leuven, Celestijnenlaan 200F, Heverlee, B-3001, Belgium
| | - Gopinadhanpillai Gopakumar
- §Fuel Chemistry Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu 603102, India.,∥Max-Planck Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr, 45470, Germany
| | - Carol A Parish
- †Department of Chemistry, University of Richmond, Richmond, Virginia 23173, United States
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Mesoporous silica xerogel modified with bridged ionic silsesquioxane used to immobilize copper tetrasulfonated phthalocyanine applied to electrochemical determination of dopamine. J Solid State Electrochem 2014. [DOI: 10.1007/s10008-014-2687-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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De Conto JF, Santos MRO, Carvalho AS, Campos KV, Freitas LS, Benvenutti EV, de Menezes EW, Santana CC, Egues SM. Naphthenic acids recovery from petroleum using ionic silica based hybrid material as stationary phase in solid phase extraction (SPE) process. ADSORPTION 2014. [DOI: 10.1007/s10450-014-9634-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Silva PSD, Gasparini BC, Magosso HA, Spinelli A. Gold nanoparticles hosted in a water-soluble silsesquioxane polymer applied as a catalytic material onto an electrochemical sensor for detection of nitrophenol isomers. JOURNAL OF HAZARDOUS MATERIALS 2014; 273:70-77. [PMID: 24721696 DOI: 10.1016/j.jhazmat.2014.03.032] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 03/06/2014] [Accepted: 03/16/2014] [Indexed: 06/03/2023]
Abstract
The water-soluble 3-n-propyl-4-picolinium silsesquioxane chloride (Si4Pic(+)Cl(-)) polymer was prepared, characterized and used as a stabilizing agent for the synthesis of gold nanoparticles (nAu). The ability of Si4Pic(+)Cl(-) to adsorb anionic metal complexes such as AuCl4(-) ions allowed well-dispersed nAu to be obtained with an average particle size of 4.5nm. The liquid suspension of nAu-Si4Pic(+)Cl(-) was deposited by the drop coating method onto a glassy carbon electrode (GCE) surface to build a sensor (nAu-Si4Pic(+)Cl(-)/GCE) which was used for the detection of o-nitrophenol (o-NP) and p-nitrophenol (p-NP). Under optimized experimental conditions the reduction peak current increased with increasing concentrations of both nitrophenol isomers in the range of 0.1-1.5μmolL(-1). The detection limits were 46nmolL(-1) and 55nmolL(-1) for o-NP and p-NP, respectively. These findings indicate that the nAu-Si4Pic(+)Cl(-) material is a very promising candidate to assemble electrochemical sensors for practical applications in the field of analytical chemistry.
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Affiliation(s)
- Paulo Sérgio da Silva
- Departamento de Química, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil
| | - Bianca C Gasparini
- Departamento de Química, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil
| | - Hérica A Magosso
- Departamento de Química, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil
| | - Almir Spinelli
- Departamento de Química, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil.
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Schneid AC, Roesch EW, Sperb F, Matte U, da Silveira NP, Costa TMH, Benvenutti EV, de Menezes EW. Silver nanoparticle–ionic silsesquioxane: a new system proposed as an antibacterial agent. J Mater Chem B 2014; 2:1079-1086. [DOI: 10.1039/c3tb21057j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Ionic silsesquioxane applied as a stabilizer of small size silver nanoparticle aqueous dispersions showing antibacterial activity at very low concentration.
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Affiliation(s)
- Andressa C. Schneid
- Instituto de Química
- Universidade Federal do Rio Grande do Sul (UFRGS)
- CP 15003
- Porto Alegre, Brazil
| | | | - Fernanda Sperb
- Hospital de Clínicas de Porto Alegre
- Porto Alegre, Brazil
| | - Ursula Matte
- Hospital de Clínicas de Porto Alegre
- Porto Alegre, Brazil
| | - Nádya P. da Silveira
- Instituto de Química
- Universidade Federal do Rio Grande do Sul (UFRGS)
- CP 15003
- Porto Alegre, Brazil
| | - Tania M. H. Costa
- Instituto de Química
- Universidade Federal do Rio Grande do Sul (UFRGS)
- CP 15003
- Porto Alegre, Brazil
| | - Edilson V. Benvenutti
- Instituto de Química
- Universidade Federal do Rio Grande do Sul (UFRGS)
- CP 15003
- Porto Alegre, Brazil
| | - Eliana W. de Menezes
- Instituto de Química
- Universidade Federal do Rio Grande do Sul (UFRGS)
- CP 15003
- Porto Alegre, Brazil
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Taylor-Pashow KML, Shehee TC, Hobbs DT. Advances in Inorganic and Hybrid Ion Exchangers. SOLVENT EXTRACTION AND ION EXCHANGE 2013. [DOI: 10.1080/07366299.2012.735510] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Determination of Copper in Different Ethanolic Matrices Using a Chloropropyl Silica Gel Modified with a Nanostructured Cubic Octa(3-aminopropyl)octasilsesquioxane. J CHEM-NY 2013. [DOI: 10.1155/2013/509341] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The chloropropyl silica gel was modified with octa(3-aminopropyl)octasilsesquioxane and characterized by Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR), spectroscopies, and surface and area porosity. The specific sorption capacity of metallic ions (Cu2+and Ni2+) increases in the following solvent order: water<ethanol 42%<ethanol<ketone. The high values of the constant (K) in the order of 103 L mol−1suggested the high adsorbent capacity of the modified silica (SGAPC) for Cu2+and Ni2+. SGAPC was applied to a separation column and shows recoveries of around 100% of copper in samples of sugar cane spirit, vodka, ginger brandy, and ethanol fuel.
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Gold nanoparticle/charged silsesquioxane films immobilized onto Al/SiO2 surface applied on the electrooxidation of nitrite. J Solid State Electrochem 2012. [DOI: 10.1007/s10008-012-1782-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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15
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de Menezes EW, Lima EC, Royer B, de Souza FE, dos Santos BD, Gregório JR, Costa TM, Gushikem Y, Benvenutti EV. Ionic silica based hybrid material containing the pyridinium group used as an adsorbent for textile dye. J Colloid Interface Sci 2012; 378:10-20. [DOI: 10.1016/j.jcis.2012.04.021] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 04/04/2012] [Accepted: 04/10/2012] [Indexed: 11/28/2022]
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dos Santos MP, Magosso HA, Yoshida IV, Gushikem Y. Poly(dimethylsiloxane) (PDMS)-Schiff base, a new polymeric network and its adsorbent capability for copper ions from ethanol. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.01.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Silva PR, Almeida VO, Machado GB, Benvenutti EV, Costa TMH, Gallas MR. Surfactant-based dispersant for multiwall carbon nanotubes to prepare ceramic composites by a sol-gel method. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1447-1452. [PMID: 22145715 DOI: 10.1021/la203056f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A dispersant for multiwall carbon nanotubes (MWCNTs) is proposed that fulfils the requirements of creating a uniform dispersion in the matrix and obtaining a good interface between CNTs and the matrix, and is soluble in generic nonpolar solvents. This dispersant is based on a long chain surfactant, called in this work dabcosil stearate, containing a stearate-based 18-carbon alkyl chain as an anion, and a silsesquioxane containing a bridged, positively charged 1,4-diazoniabicyclo[2.2.2]octane group. It provides not only a very good dispersion medium for the MWCNTs, but also a very good interface between MWCNTs and ceramic matrices, such as alumina and zirconia, prepared by the sol-gel method.
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Affiliation(s)
- Patrícia R Silva
- Instituto de Física, Universidade Federal do Rio Grande do Sul, PO Box 15051, CEP 91501-970 Porto Alegre, RS Brazil
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Arguello J, Magosso HA, Landers R, Pimentel VL, Gushikem Y. Synthesis, characterization and electroanalytical application of a new SiO2/SnO2 carbon ceramic electrode. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.08.073] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Magosso HÃ, Luz R, Gushikem Y. Preparation and Properties of the Hybrid Materialn-Propyl(3-methylpyridinium)silsesquioxane Chloride. Application in Electrochemical Determination of Nitrite. ELECTROANAL 2010. [DOI: 10.1002/elan.200900297] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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