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Parveen K, Rafique U, Jamil I, Ashraf A. Photodegradation of Rhodamine B using gallium hybrids as an efficient photocatalyst. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1106. [PMID: 37642762 DOI: 10.1007/s10661-023-11683-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 08/07/2023] [Indexed: 08/31/2023]
Abstract
Keeping in view the toxicity of the Rhodamine B, the present study is designed to remediate the water loaded with toxic dyes using gallium oxide and gallium hybrids as photocatalyst. Precipitation coupled with sonochemical method is adopted for the synthesis of gallium oxide while the post grafting method is adopted for the synthesis of gallium hybrids with the indole and its derivatives. FTIR spectra showed the characteristic absorption bands of gallium oxide and gallium hybrids at 400-700 cm-1 and 1400-1600 cm-1. SEM and XRD showed the micro-sized rectangular rod-shaped gallium oxide with rhombohedral geometry. The average crystallite size of gallium hybrids was 26-32 nm calculated using the Debye Scherrer and Williamson-Hal models. The BET isotherm of gallium hybrids revealed the adsorption type-IV and hysteresis loop (H3) proposing multilayer and mesoporous structures with increase in surface area from 26 m2/g of gallium oxide to 31 m2/g of gallium-indole, 35 m2/g of gallium-methyl indole, and 37 m2/g of gallium-carboxylic indole. XPS showed the presence of gallium (3-14%), oxygen (28-32%), nitrogen (23-46%), and carbon (9-46%). The gallium oxide and gallium hybrids showed 47-72% optimum degradation of Rhodamine B under 2 h of illumination at pH 7 and 0.03 mg/L. The degradation rate followed a Langmuir-Hinshelwood model with R2 > 0.9.
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Affiliation(s)
- Kousar Parveen
- Department of Environmental Sciences, The Women University Multan, Multan, 66000, Pakistan.
| | - Uzaira Rafique
- Department of Environmental Sciences, Fatima Jinnah Women University, The Mall, Rawalpindi, 46000, Pakistan
| | - Ishrat Jamil
- Department of Chemistry, University of Baltistan Skardu, Gilgit-Baltistan, Pakistan
| | - Anam Ashraf
- School of Environment, Tsinghua University, Beijing, 100084, China
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Effect of non-functionalized and functionalized graphene oxide with a silane agent on the thermal and rheological properties of nylon 6,6. IRANIAN POLYMER JOURNAL 2023. [DOI: 10.1007/s13726-022-01110-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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3
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Ali I, Ali A, Ali A, Ramzan M, Hussain K, Xudong L, Jin Z, Titton Dias OA, Weimin Y, Haoyi L, Liyan Z, Sain M. Highly electro‐responsive composite gel based on functionally tuned graphene filled polyvinyl chloride. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5376] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Imdad Ali
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing P.R. China
- Department of Mechanical Engineering QUEST Nawabshah Sindh Pakistan
| | - Ahsan Ali
- Department of Mechanical Engineering QUEST Nawabshah Sindh Pakistan
| | - Ahmed Ali
- Department of Electrical Engineering Sukkur IBA University Sindh Pakistan
| | - Muhammad Ramzan
- Department of Mechanical Engineering QUEST Nawabshah Sindh Pakistan
| | - Khalid Hussain
- Department of Mechanical Engineering QUEST Nawabshah Sindh Pakistan
| | - Li Xudong
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing P.R. China
| | - Zhan Jin
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing P.R. China
| | - Otavio Augusto Titton Dias
- Centre for Biocomposites and Biomaterials Processing, Graduate Department of Forestry University of Toronto Toronto Ontario Canada
| | - Yang Weimin
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing P.R. China
| | - Li Haoyi
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing P.R. China
| | - Zhang Liyan
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing P.R. China
| | - Mohini Sain
- Centre for Biocomposites and Biomaterials Processing, Graduate Department of Forestry University of Toronto Toronto Ontario Canada
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Nkutha CS, Diagboya PN, Mtunzi FM, Dikio ED. Application of eco-friendly multifunctional porous graphene oxide for adsorptive sequestration of chromium in aqueous solution. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2020; 92:1070-1079. [PMID: 31999017 DOI: 10.1002/wer.1303] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 01/23/2020] [Accepted: 01/24/2020] [Indexed: 06/10/2023]
Abstract
Graphene oxide (GO) was functionalized using two silanes ((3-aminopropyl)-triethoxysilane and (3-mercaptopropyl)-triethoxysilane) to obtain, separately, the eco-friendly amine-functionalized GO (GONH) and thiol-functionalized GO (GOSH). Both silanes were also used together to obtain the amine-thiol dual-functionalized GO (GOSN). Various physicochemical characterizations were obtained including spectra from using Fourier-transform infrared (FTIR) spectrometer, thermogravimetric analyzer, and X-ray diffractometer. The adsorbents were used for a comparative study of Cr adsorption from aqueous solution. The obtained data were fitted to pseudo-first order (PFO) and pseudo-second order (PSO) models, the homogeneous fractal pseudo-second order (FPSO), and the Weber-Morris intraparticle diffusion (IPD) kinetics models. Model parameters of the Langmuir and Freundlich adsorption isotherm models, as well as the thermodynamics, were calculated. Characterization results showed successful functionalizations. The GONH, GOSH, and GOSN exhibited alkaline, acidic, and neutral pH, respectively, in water. Amine and thiol functional groups were observed in the new adsorbents, as well as reduced orderliness. The adsorbents had higher density per unit weight and better thermal stability than pristine GO. Equilibrium Cr adsorption was attained within 60 min for all adsorbents. The PSO and FPSO described the rate data better. The Cr adsorption decreased as solution pH increased; optimum adsorption was recorded at pH 2. Equilibrium adsorption data fitted the Langmuir adsorption isotherm model for the GONH, while it fitted the Freundlich for both GOSH and GOSN. The adsorption process was theoretically exothermic process that was spontaneous processes. The Cr adsorption capacities of these adsorbents are 114, 89.6, and 173 mg/g for GONH, GOSH, and GOSN, respectively, and these were better than several reported graphene-based adsorbents and suggest the potential of these adsorbents for water treatment. PRACTITIONER POINTS: Graphene oxide was mono and dual-functionalized with amine and thiol groups for Cr adsorption. The adsorption capacities of these adsorbents were better than several earlier reported. These adsorbents may be used for real contaminated water treatment.
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Affiliation(s)
- Cynthia S Nkutha
- Department of Chemistry, Vaal University of Technology, Vanderbijlpark, South Africa
| | - Paul N Diagboya
- Department of Chemistry, Vaal University of Technology, Vanderbijlpark, South Africa
| | - Fanyana M Mtunzi
- Department of Chemistry, Vaal University of Technology, Vanderbijlpark, South Africa
| | - Ezekiel D Dikio
- Department of Chemical Sciences, Niger Delta University, Wilberforce Island, Nigeria
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Shan J, Zeng T, Wu W, Tan Y, Cheng N, Mu S. Enhancement of the performance of Pd nanoclusters confined within ultrathin silica layers for formic acid oxidation. NANOSCALE 2020; 12:12891-12897. [PMID: 32520062 DOI: 10.1039/d0nr00307g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The optimized design of highly active and stable anode electrocatalysts is essential for high performance direct formic acid fuel cells (DFAFCs). Herein, a facile and cost-effective strategy was proposed to fabricate a robust ultrasmall Pd nanocluster confined within ultrathin protective silica layers anchored on nitrogen doped reduced GO (NrGO) through generating amine functionalized graphene oxide with 3-aminopropyl triethoxysilane (APTES), followed by tuning the thickness of protective silica layers by precisely controlling the amount of tetraethylorthosilicate (TEOS). Amine functionalized graphene oxide generated by using APTES favors the formation of ultrasmall Pd nanoclusters due to the coordination of amine to PdCl24- while the confinement effect of ultrathin protective silica layers stabilizes ultrasmall Pd nanoclusters and impedes the agglomeration and sintering of ultrasmall Pd nanoclusters during electrocatalysis. As a result, the ultrasmall Pd nanoclusters (∼1.4 nm) confined in silica layers on NrGO (Pd/NrGO@SiO2) demonstrate a very high forward peak current density for formic acid oxidation (FAO) of 2.37 A mg-1, outperforming the Pd/C catalyst (0.30 A mg-1) and the Pd/rGO catalyst obtained by a conventional method (0.42 A mg-1). More importantly, our confined Pd catalysts show the highest stability of only 5% inconspicuous degradation of the initial mass activity after 1000 cycles, compared with Pd/C (almost 100% loss), Pd/rGO (61.5% loss) and Pd/NrGO (73.2% loss). These strategies in this work provide a new prospect for the design of excellent noble catalysts to overcome the challenges in the practical application of DFAFCs.
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Affiliation(s)
- Jiefei Shan
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China.
| | - Tang Zeng
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China.
| | - Wei Wu
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China.
| | - Yangyang Tan
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China.
| | - Niancai Cheng
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China.
| | - Shichun Mu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China.
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Soğukömeroğulları HG, Karataş Y, Celebi M, Gülcan M, Sönmez M, Zahmakiran M. Palladium nanoparticles decorated on amine functionalized graphene nanosheets as excellent nanocatalyst for the hydrogenation of nitrophenols to aminophenol counterparts. JOURNAL OF HAZARDOUS MATERIALS 2019; 369:96-107. [PMID: 30776607 DOI: 10.1016/j.jhazmat.2019.02.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/04/2019] [Accepted: 02/08/2019] [Indexed: 06/09/2023]
Abstract
We reported the improved catalytic property of Pd (0) nanoparticles decorated on amine-functionalized graphene nanosheets (Pd/GNS-NH2) for the hydrogenation of nitrophenol derivatives in the presence of NaBH4 at moderate conditions. Pd/GNS-NH2 nanocatalyst was synthesized by the deposition-reduction method. Sundry techniques such as ICP-OES, P-XRD, XPS, TEM, HR-TEM and EDX have been applied to explain the structure and morphology of the Pd/GNS-NH2 nanocatalyst. The results show that the Pd (0) nanoparticles are perfectly dispersed on the surface of the GNS-NH2 support material (dmean = 1.38-2.63 nm). The catalytic activity of the Pd/GNS-NH2 nanocatalyst was tested in the hydrogenation of nitrophenol derivatives in water in the presence of NaBH4 as reductant and the excellent activity of nanocatalyst have been detected against 2-nitrophenol, 4-nitrophenol, 2,4-dinitrophenol and 2,4,6-trinitrophenol derivatives with 116.8, 65.9, 42.8 and 11.4 min-1 initial TOF values, respectively. Another important point is that the nanocatalyst has very high reusability performance (at 5th reuse between 71.5 and 91.5%) for the hydrogenation of nitrophenols. Finally, catalytic studies have been carried out at various temperatures to calculate the Ea, ΔH≠ and ΔS≠.
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Affiliation(s)
| | - Yaşar Karataş
- Department of Chemistry, Van Yüzüncü Yıl University, Van, 65080, Turkey
| | - Metin Celebi
- Department of Chemistry, Van Yüzüncü Yıl University, Van, 65080, Turkey
| | - Mehmet Gülcan
- Department of Chemistry, Van Yüzüncü Yıl University, Van, 65080, Turkey.
| | - Mehmet Sönmez
- Department of Chemistry, Gaziantep University, Gaziantep, 27310, Turkey
| | - Mehmet Zahmakiran
- Department of Chemistry, Van Yüzüncü Yıl University, Van, 65080, Turkey
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Abbasi H, Antunes M, Velasco JI. Polyetherimide Foams Filled with Low Content of Graphene Nanoplatelets Prepared by scCO₂ Dissolution. Polymers (Basel) 2019; 11:E328. [PMID: 30960311 PMCID: PMC6419172 DOI: 10.3390/polym11020328] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 02/09/2019] [Accepted: 02/11/2019] [Indexed: 12/15/2022] Open
Abstract
Polyetherimide (PEI) foams with graphene nanoplatelets (GnP) were prepared by supercritical carbon dioxide (scCO₂) dissolution. Foam precursors were prepared by melt-mixing PEI with variable amounts of ultrasonicated GnP (0.1⁻2.0 wt %) and foamed by one-step scCO₂ foaming. While the addition of GnP did not significantly modify the cellular structure of the foams, melt-mixing and foaming induced a better dispersion of GnP throughout the foams. There were minor changes in the degradation behaviour of the foams with adding GnP. Although the residue resulting from burning increased with augmenting the amount of GnP, foams showed a slight acceleration in their primary stages of degradation with increasing GnP content. A clear increasing trend was observed for the normalized storage modulus of the foams with incrementing density. The electrical conductivity of the foams significantly improved by approximately six orders of magnitude with only adding 1.5 wt % of GnP, related to an improved dispersion of GnP through a combination of ultrasonication, melt-mixing and one-step foaming, leading to the formation of a more effective GnP conductive network. As a result of their final combined properties, PEI-GnP foams could find use in applications such as electrostatic discharge (ESD) or electromagnetic interference (EMI) shielding.
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Affiliation(s)
- Hooman Abbasi
- Centre Català del Plàstic, Departament de Ciència dels Materials i Enginyeria Metal lúrgica, Universitat Politècnica de Catalunya (UPC Barcelona Tech), C/Colom 114, E-08222 Terrassa, Barcelona, Spain.
| | - Marcelo Antunes
- Centre Català del Plàstic, Departament de Ciència dels Materials i Enginyeria Metal lúrgica, Universitat Politècnica de Catalunya (UPC Barcelona Tech), C/Colom 114, E-08222 Terrassa, Barcelona, Spain.
| | - José Ignacio Velasco
- Centre Català del Plàstic, Departament de Ciència dels Materials i Enginyeria Metal lúrgica, Universitat Politècnica de Catalunya (UPC Barcelona Tech), C/Colom 114, E-08222 Terrassa, Barcelona, Spain.
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8
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Kahyaoglu LN, Rickus JL. Robust Covalent Coupling Scheme for the Development of FRET Aptasensor based on Amino-Silane-Modified Graphene Oxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14586-14596. [PMID: 30398888 DOI: 10.1021/acs.langmuir.8b02663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In recent years, numerous aptamers have been physisorbed on graphene oxide (GO) to develop fluorescence resonance energy transfer-based aptasensors using the fluorescence quenching property of GO. However, physisorbed aptasensors show poor signal reversibility and reproducibility as well as nonspecific probe displacement, and thereby are not suitable for many analytical applications. To overcome these problems when working with complex biological samples, we developed a facile and robust covalent surface functionalization technique for GO-based fluorescent aptasensors using a well-studied adenosine triphosphate binding aptamer (ABA). In the scheme, GO is first modified with amino-silane, and further with glutaraldehyde to create available carbonyl groups for the covalent attachment of a fluorophore and an amino dual modified ABA. The surface modification method was characterized by ζ-potential, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy (FTIR). The linearity, sensitivity, selectivity, and reversibility of the resulting GO-based covalent aptasensor was determined and systematically compared with the physisorbed aptasensor. Although both sensors showed similar performance in terms of sensitivity and linearity, better selectivity and higher resistance to nonspecific probe displacement was achieved with the developed covalent ABA sensor. The surface modification technique developed here is independent of the aptamer sequence, and therefore could be used universally for different analytical applications simply by changing the aptamer sequence for the target biomolecule.
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Khantamat O, Li CH, Liu SP, Liu T, Lee HJ, Zenasni O, Lee TC, Cai C, Lee TR. Broadening the photoresponsive activity of anatase titanium dioxide particles via decoration with partial gold shells. J Colloid Interface Sci 2018; 513:715-725. [DOI: 10.1016/j.jcis.2017.10.053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 10/13/2017] [Accepted: 10/13/2017] [Indexed: 12/20/2022]
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10
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Huang X, Shahzad SA, Li Y, Zhang Y, Sang L, Zhou H, Jiang H, Kam-Wing Lo K, Yu C. Silver nanoclusters capped silica nanoparticles as a ratiometric photoluminescence nanosensor for the selective detection of I− and S2−. Anal Chim Acta 2017; 988:74-80. [DOI: 10.1016/j.aca.2017.07.056] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 07/14/2017] [Accepted: 07/21/2017] [Indexed: 11/17/2022]
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Li L, Wang Z, Zhang S, Wang M. Directly-thiolated graphene based organic solvent-free cloud point extraction-like method for enrichment and speciation of mercury by HPLC-ICP-MS. Microchem J 2017. [DOI: 10.1016/j.microc.2017.02.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Lue SJ, Pai YL, Shih CM, Wu MC, Lai SM. Novel bilayer well-aligned Nafion/graphene oxide composite membranes prepared using spin coating method for direct liquid fuel cells. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.07.007] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Huang CJ, Chu SH, Wang LC, Li CH, Lee TR. Bioinspired Zwitterionic Surface Coatings with Robust Photostability and Fouling Resistance. ACS APPLIED MATERIALS & INTERFACES 2015; 7:23776-23786. [PMID: 26452141 DOI: 10.1021/acsami.5b08418] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Great care has been paid to the biointerface between a bulk material and the biological environment, which plays a key role in the optimized performance of medical devices. In this work, we report a new superhydrophilic adsorbate, called L-cysteine betaine (Cys-b), having branched zwitterionic groups that give rise to surfaces and nanoparticles with enhanced chemical stability, biofouling resistance, and inertness to environmental changes. Cys-b was synthesized from the amphoteric sulfur-containing amino acid, L-cysteine (Cys), by quaternization of its amino group. Gold surfaces modified with Cys-b exhibited prominent repellence against the nonspecific adsorption of proteins, bacteria, and fibroblast cells. In addition, Cys-b existed in zwitterionic form over a wide pH range (i.e., pH 3.4 to 10.8), and showed excellent suppression in photoinduced oxidation on gold substrates. Furthermore, the modification of hollow Ag@Au nanoshells with Cys-b gave rise to nanoparticles with excellent colloidal stability and resistance to coordinative interaction with Cu(2+). Taken together, the unique features of Cys-b offer a new nanoscale coating for use in a wide spectrum of applications.
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Affiliation(s)
| | | | | | - Chien-Hung Li
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , Houston, Texas 77204-5003 United States
| | - T Randall Lee
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , Houston, Texas 77204-5003 United States
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Zawisza B, Baranik A, Malicka E, Talik E, Sitko R. Preconcentration of Fe(III), Co(II), Ni(II), Cu(II), Zn(II) and Pb(II) with ethylenediamine-modified graphene oxide. Mikrochim Acta 2015; 183:231-240. [PMID: 26766877 PMCID: PMC4701767 DOI: 10.1007/s00604-015-1629-y] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 08/24/2015] [Indexed: 11/03/2022]
Abstract
We describe a novel solid phase sorbent that was synthesized by coupling graphene oxide (GO) to ethylenediamine (EDA). This nanomaterial (referred to as GO-EDA) is capable of adsorbing the ions of iron, cobalt, nickel, copper, zinc and lead. The ethylenediamine-modified graphene oxide was characterized by X-ray photoelectron spectroscopy, scanning electron microscopy and Fourier transform infrared spectroscopy. The analytical procedure relies on (a) sorption of metal ions on GO-EDA dispersed in aqueous samples; (b) filtering, and (c) direct submission of the filter paper to energy-dispersive X-ray fluorescence spectrometry. This kind of dispersive micro-solid phase extraction was optimized with respect to pH values, concentration of GO-EDA, contact time, and the effects of interfering ions and humic acid on recovery of determined elements. Under optimized conditions, the recoveries of spiked samples range from 90 to 98 %. The detection limits are 0.07, 0.10, 0.07, 0.08, 0.06 and 0.10 ng mL-1 for Fe(III), Co(II), Ni(II), Cu(II), Zn(II) and Pb(II), respectively. The method has a relative standard deviation of <6 %, and its accuracy was verified by analysis of two standard reference materials [LGC6016 (estuarine water) and BCR-610 (groundwater)]. It was successfully applied to the determination of trace amounts of these metal ions in water samples. Graphical AbstractGraphene oxide was coupled to ethylenediamine in order to obtain an effective sorbent (GO-EDA) for preconcentration of Fe(III), Co(II), Ni(II), Cu(II), Zn(II) and Pb(II) from environmental water samples.
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Affiliation(s)
- Beata Zawisza
- />Institute of Chemistry, University of Silesia, ul. Szkolna 9, 40-006 Katowice, Poland
| | - Anna Baranik
- />Institute of Chemistry, University of Silesia, ul. Szkolna 9, 40-006 Katowice, Poland
| | - Ewa Malicka
- />Institute of Chemistry, University of Silesia, ul. Szkolna 9, 40-006 Katowice, Poland
| | - Ewa Talik
- />Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
| | - Rafał Sitko
- />Institute of Chemistry, University of Silesia, ul. Szkolna 9, 40-006 Katowice, Poland
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15
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Neri G, Scala A, Barreca F, Fazio E, Mineo PG, Mazzaglia A, Grassi G, Piperno A. Engineering of carbon based nanomaterials by ring-opening reactions of a reactive azlactone graphene platform. Chem Commun (Camb) 2015; 51:4846-9. [PMID: 25695678 DOI: 10.1039/c5cc00518c] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A reactive azlactone-based graphene nanoplatform was successfully synthesized by the ligation of azido-azlactone with alkyne-terminated graphene via Cu(I)-catalyzed cycloaddition. The reactive azlactone rings, grafted on graphene sheets, were subjected to highly efficient ring-opening reactions with functionalized primary amine derivatives incorporating an aminosilane coupling agent or a biological fragment.
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Affiliation(s)
- G Neri
- Dipartimento di Scienze Chimiche, Università di Messina, V.le F. Stagno D'Alcontres 31, 98166, Messina, Italy.
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16
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Sitko R, Janik P, Zawisza B, Talik E, Margui E, Queralt I. Green approach for ultratrace determination of divalent metal ions and arsenic species using total-reflection X-ray fluorescence spectrometry and mercapto-modified graphene oxide nanosheets as a novel adsorbent. Anal Chem 2015; 87:3535-42. [PMID: 25707847 DOI: 10.1021/acs.analchem.5b00283] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A new method based on dispersive microsolid phase extraction (DMSPE) and total-reflection X-ray fluorescence spectrometry (TXRF) is proposed for multielemental ultratrace determination of heavy metal ions and arsenic species. In the developed methodology, the crucial issue is a novel adsorbent synthesized by grafting 3-mercaptopropyl trimethoxysilane on a graphene oxide (GO) surface. Mercapto-modified graphene oxide (GO-SH) can be applied in quantitative adsorption of cobalt, nickel, copper, cadmium, and lead ions. Moreover, GO-SH demonstrates selectivity toward arsenite in the presence of arsenate. Due to such features of GO-SH nanosheets as wrinkled structure and excellent dispersibility in water, GO-SH seems to be ideal for fast and simple preconcentration and determination of heavy metal ions using methodology based on DMSPE and TXRF measurement. The suspension of GO-SH was injected into an analyzed water sample; after filtration, the GO-SH nanosheets with adsorbed metal ions were redispersed in a small volume of internal standard solution and deposited onto a quartz reflector. The high enrichment factor of 150 allows obtaining detection limits of 0.11, 0.078, 0.079, 0.064, 0.054, and 0.083 ng mL(-1) for Co(II), Ni(II), Cu(II), As(III), Cd(II), and Pb(II), respectively. Such low detection limits can be obtained using a benchtop TXRF system without cooling media and gas consumption. The method is suitable for the analysis of water, including high salinity samples difficult to analyze using other spectroscopy techniques. Moreover, GO-SH can be applied to the arsenic speciation due to its selectivity toward arsenite.
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Affiliation(s)
- Rafal Sitko
- †University of Silesia, Institute of Chemistry, Szkolna 9, 40-006 Katowice, Poland
| | - Paulina Janik
- †University of Silesia, Institute of Chemistry, Szkolna 9, 40-006 Katowice, Poland
| | - Beata Zawisza
- †University of Silesia, Institute of Chemistry, Szkolna 9, 40-006 Katowice, Poland
| | - Ewa Talik
- ‡University of Silesia, Institute of Physics, Uniwersytecka 4, 40-007 Katowice, Poland
| | - Eva Margui
- §Department of Chemistry, University of Girona, Campus Montilivi, 17071 Girona, Spain
| | - Ignasi Queralt
- ∥Laboratory of X-ray Analytical Applications, Institute of Earth Sciences Jaume Almera, CSIC, Solé Sabarís s/n, 08028 Barcelona, Spain
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17
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Xu LL, Guo MX, Liu S, Bian SW. Graphene/cotton composite fabrics as flexible electrode materials for electrochemical capacitors. RSC Adv 2015. [DOI: 10.1039/c4ra16063k] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Graphene/cotton composite fabrics were successfully synthesized via a facile “dipping and drying” process followed by a NaBH4 reduction method.
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Affiliation(s)
- Ling-Li Xu
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
- P. R. China
| | - Mei-Xia Guo
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
- P. R. China
| | - Si Liu
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
- P. R. China
| | - Shao-Wei Bian
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
- P. R. China
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18
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Wang C, Zhou J, Chu L. Chlorine-functionalized reduced graphene oxide for methylene blue removal. RSC Adv 2015. [DOI: 10.1039/c5ra05618g] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Hydroxyl group in graphene oxide can be substituted by chlorine in sulfuryl chloride at mild condition.
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Affiliation(s)
- Chubei Wang
- Institute of Energy and Fuel
- Xinxiang University
- Xinxiang
- China
| | - Jianwei Zhou
- Institute of Energy and Fuel
- Xinxiang University
- Xinxiang
- China
| | - Liangliang Chu
- Institute of Energy and Fuel
- Xinxiang University
- Xinxiang
- China
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19
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Sitko R, Janik P, Feist B, Talik E, Gagor A. Suspended aminosilanized graphene oxide nanosheets for selective preconcentration of lead ions and ultrasensitive determination by electrothermal atomic absorption spectrometry. ACS APPLIED MATERIALS & INTERFACES 2014; 6:20144-20153. [PMID: 25329565 DOI: 10.1021/am505740d] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The aminosilanized graphene oxide (GO-NH2) was prepared for selective adsorption of Pb(II) ions. Graphene oxide (GO) and GO-NH2 prepared through the amino-silanization of GO with 3-aminopropyltriethoxysilane were characterized by scanning electron microscopy, powder X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy. The batch experiments show that GO-NH2 is characterized by high selectivity toward Pb(II) ions. Adsorption isotherms suggest that sorption of Pb(II) on GO-NH2 nanosheets is monolayer coverage, and adsorption is controlled by a chemical process involving the surface complexation of Pb(II) ions with the nitrogen-containing groups on the surface of GO-NH2. Pb(II) ions can be quantitatively adsorbed at pH 6 with maximum adsorption capacity of 96 mg g(-1). The GO-NH2 was used for selective and sensitive determination of Pb(II) ions by electrothermal atomic absorption spectrometry (ET-AAS). The preconcentration of Pb(II) ions is based on dispersive micro solid-phase extraction in which the suspended GO-NH2 is rapidly injected into analyzed water sample. Such features of GO-NH2 nanosheets as wrinkled structure, softness, flexibility, and excellent dispersibility in water allow achieving very good contact with analyzed solution, and adsorption of Pb(II) ions is very fast. The experiment shows that after separation of the solid phase, the suspension of GO-NH2 with adsorbed Pb(II) ions can be directly injected into the graphite tube and analyzed by ET-AAS. The GO-NH2 is characterized by high selectivity toward Pb(II) ions and can be successfully used for analysis of various water samples with excellent enrichment factors of 100 and detection limits of 9.4 ng L(-1).
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Affiliation(s)
- Rafal Sitko
- Institute of Chemistry and ‡Institute of Physics, University of Silesia , Katowice, Poland
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