1
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Li S, Yan J, Zhang Y, Qin Y, Zhang Y, Du S. Comparative investigation of carbon nanotubes dispersion using surfactants: A molecular dynamics simulation and experimental study. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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2
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Robinson JG, Gonawan FN, Harun Kamaruddin A. Optimization of Binary Polymer Concentration for Dispersion of Multiwalled Carbon Nanotubes in Aqueous Solution. Chem Eng Technol 2022. [DOI: 10.1002/ceat.202200151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jackson Genza Robinson
- Universiti Sains Malaysia School of Chemical Engineering, Engineering Campus 14300 Seri Ampangan Nibong Tebal Pulau Pinang Malaysia
- Adamawa State College of Education Chemistry Department, School of Sciences PM B 223, Yola Hong Adamawa State Nigeria
| | - Fadzil Noor Gonawan
- Universiti Sains Malaysia School of Chemical Engineering, Engineering Campus 14300 Seri Ampangan Nibong Tebal Pulau Pinang Malaysia
| | - Azlina Harun Kamaruddin
- Universiti Sains Malaysia School of Chemical Engineering, Engineering Campus 14300 Seri Ampangan Nibong Tebal Pulau Pinang Malaysia
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3
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Rytel K, Kędzierski K, Barszcz B, Biadasz A, Majchrzycki Ł, Wróbel D. The influence of zinc phthalocyanine on the formation and properties of multiwalled carbon nanotubes thin films on the air–solid and air–water interface. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Montes-Zavala I, Castrejón-González EO, Rico-Ramírez V, Pérez E, Santamaría-Razo DA, González-Calderón JA. Which is better? Experimental and simulation analyses of the chemical modification of carbon nanotubes to improve their dispersion in water. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2020.1763179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- I. Montes-Zavala
- Departamento de Ingeniería Química, Tecnológico Nacional de México en Celaya, Celaya, Guanajuato, México
| | - E. O. Castrejón-González
- Departamento de Ingeniería Química, Tecnológico Nacional de México en Celaya, Celaya, Guanajuato, México
| | - V. Rico-Ramírez
- Departamento de Ingeniería Química, Tecnológico Nacional de México en Celaya, Celaya, Guanajuato, México
| | - Elias Pérez
- Instituto de Física, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México
| | | | - J. A. González-Calderón
- Cátedras CONACYT-Instituto de Física, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México
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5
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Li F, Liu L, Yang Z, Li S. Dispersion of Functionalized Multi-Walled Carbon Nanotubes in Aqueous Solution. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421050125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Pontoreau M, Emmanuel LG, Bourda C, Silvain JF. Optimization of highly concentrated dispersions of multi-walled carbon nanotubes with emphasis on surfactant content and carbon nanotubes quality. NANOTECHNOLOGY 2020; 31:405707. [PMID: 32544903 DOI: 10.1088/1361-6528/ab9d42] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Optimized multi-wall carbon nanotubes (MWNT) suspensions in aqueous solution have been obtained by joint use of ultrasonification and surfactant. A simple experimental procedure has been established to efficiently evaluate the dependence of the surfactant concentration on the MWNT concentration stable in suspension. The study of three different surfactants and MWNT provided by three suppliers showed that a threshold surfactant concentration exists above which the MWNT concentration is maximum. Furthermore, it is demonstrated that the maximum MWNT concentration achievable varies from 0.50 to 7.5 g l-1 depending mainly on quality of the MWNT determined by raman spectroscopy analysis.
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Affiliation(s)
- Maël Pontoreau
- CNRS, Univ. Bordeaux, Bordeaux INP, ICMCB, UMR 5026, Pessacf-33608, France
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Dong X, Yang J, Zhen XT, Chen Y, Zheng H, Cao J. Micellar extraction with vesicle coated multi-walled carbon nanotubes to assist the dispersive micro-solid-phase extraction of natural phenols in Dendrobium. J Pharm Biomed Anal 2020; 188:113461. [PMID: 32682247 DOI: 10.1016/j.jpba.2020.113461] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 07/02/2020] [Accepted: 07/03/2020] [Indexed: 11/15/2022]
Abstract
Here, catanionic surfactant vesicles were prepared by varying the types and compositions of anions and cations and the number of alkyl tails of the surfactants. The formed vesicles were employed to disaggregate and stabilize multiwalled carbon nanotubes bundles in aqueous solutions. Furthermore, the vesicle coated carbon nanotubes were used as the adsorbent in the dispersive micro-solid phase extraction. Additionally, micellar extraction was employed for the sample pre-extraction to avoid the use of toxic organic extraction solvents. The relative parameters that affect the extraction efficiency of targets were optimized using response surface methodology. Under the optimal microextraction conditions, the analytical performance of the established method was evaluated. The limits of detection (2.3-13 ng/mL) and quantification (7.6-42 ng/mL), inter- and intra- day precision (1.2-4.0 %, 2.0-5.0 %), and spiked recovery values (80-91 %) were obtained. The proposed method showed high sensitivity, precision and trueness. It was successfully applied to analyze phenols in Dendrobium genus samples.
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Affiliation(s)
- Xin Dong
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 310018, China
| | - Jun Yang
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 310018, China
| | - Xiao-Ting Zhen
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 310018, China
| | - Yan Chen
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 310018, China
| | - Hui Zheng
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 310018, China.
| | - Jun Cao
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 310018, China.
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8
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Safa F, Osaghi B. Adsorption onto MWCNTs Coupled with Cloud Point Extraction for Dye Removal from Aqueous Solutions: Optimization by Experimental Design. Comb Chem High Throughput Screen 2020; 24:246-258. [PMID: 32552635 DOI: 10.2174/1386207323666200618153940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 01/17/2020] [Accepted: 04/20/2020] [Indexed: 11/22/2022]
Abstract
AIMS The main aim of the study was to examine the feasibility and benefits of adsorption onto multi-walled carbon nanotubes (MWCNTs) coupled with cloud point extraction (CPE) for the removal of Rhodamine B (RB) from aqueous solutions. BACKGROUND MWCNTs offer the particular features of the ideal adsorbents for the organic dyes such as hollow tubular structure and specific surface area. Nevertheless, they suffer from the drawbacks of low dispersion in the aqueous solutions and separation inconvenience from the media. Cloud point extraction, combined with the adsorption onto MWCNTs can be a promising method to overcome the problems. OBJECTIVE In the study, adsorption onto MWCNTs coupled with CPE was applied for RB removal from aqueous solutions. The process was optimized by the response surface modeling method. Moreover, the applicability of the proposed method in the real sample analyses was investigated. METHODS MWCNTs were used as adsorbent and Triton X-100 (TX-100) as the nonionic surfactant for CPE process. The experiments were carried out based on a Box-Behnken design (BBD) with the input variables of MWCNTs dosage (0.6-1.2 mg), solution pH (3-9), clouding time (20-40 min) and TX-100 concentration (10-20 v/v%) using 5 mg L-1 RB solutions. RESULT Regression analyses resulted in a statistically significant quadratic model (R2=0.9718, F=24.96, p<0.0001) by which the optimum levels of the variables were predicted as: MWCNTs dosage of 0.7 mg, pH=3, clouding time of 39.9 minutes and TX-100 concentration of 19.91% (v/v). The predicted conditions were experimentally validated by achieving an RB removal of 94.24%. CONCLUSION Based on the results, the combination of the environmentally friendly technique of CPE with adsorption onto MWCNTs allows the efficient removal of RB from water samples and the method can be effectively optimized by the response surface modeling.
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Affiliation(s)
- Fariba Safa
- Department of Chemistry, Rasht Branch, Islamic Azad University, Rasht, Iran
| | - Bahare Osaghi
- Department of Chemistry, Rasht Branch, Islamic Azad University, Rasht, Iran
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9
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Baomin Wang, Bo Pang. The Influence of N,N-Dimethylformamide on Dispersion of Multi-Walled Carbon Nanotubes. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2020. [DOI: 10.1134/s0036024420040019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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10
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Huang Y, Song K, Luo W, Yang J. Adsorption and reduction of Cr(VI) by hydroxylated multiwalled carbon nanotubes: effects of humic acid and surfactants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:12746-12754. [PMID: 32008189 DOI: 10.1007/s11356-020-07682-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 01/07/2020] [Indexed: 06/10/2023]
Abstract
The present study investigated the impacts of humic acid (HA) and surfactants (SDBS and CTAB), which were ubiquitously found in the aquatic environments, on the removal of Cr(VI) by the hydroxylated MWCNTs-OH. The results showed that MWCNTs-OH could remove Cr(VI) from aqueous solution via adsorption coupled with reduction, and the kinetics followed the pseudo-first-order model with the rate of 3.5 × 10-3 h-1. In the presence of anionic SDBS, the removal percentage of Cr(VI) was greatly inhibited because the hydrophobic interaction and π-π interaction between SDBS and MWCNTs-OH surfaces not only decreased the adsorption sites for Cr(VI) but also made the surfaces more negatively charged. On the contrary, the existence of cationic CTAB could lead to the surfaces more positively charged, which consequently enhance the electrostatic attraction between Cr(VI) and the surfaces as well as the removal of Cr(VI). Noticeably, the presence of HA could promote the removal of Cr(VI), which was attributed to the reduction of Cr(VI) by the adsorbed HA. The ESR spectra indicated the existence of π-type radicals in HA structure and conduction electrons in MWCNTs-OH, and then the π-π interaction between MWCNTs-OH and adsorbed HA possibly increase the electron-donating ability of HA. Moreover, the promotive effect of HA could be enhanced with the addition of Ca2+. This study was helpful for us to understand the role of MWCNTs-OH in controlling the fate of Cr(VI) when HA and surfactants were present.
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Affiliation(s)
- Yu Huang
- College of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510025, China
| | - Ke Song
- College of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510025, China
| | - Wei Luo
- College of Chemistry and Environmental Sciences, Guangdong Ocean University, Zhanjiang, 524088, People's Republic of China
| | - Jiewen Yang
- College of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510025, China.
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11
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All-electrochemical nanocomposite two-electrode setup for quantification of drugs and study of their electrocatalytical conversion by cytochromes P450. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2019.135579] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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12
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Zhao T, Chen J, Chen Y, Zhang Y, Peng J. Study on synergistic enhancement of oil recovery by halloysite nanotubes and glucose-based surfactants. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1721297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Tianhong Zhao
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, China
| | - Jiawei Chen
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, China
| | - Ying Chen
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, China
- PetroChina Southwest Oil & Gasfeild Company, Production Technology Office, Chongqiang, China
| | - Yiwen Zhang
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, China
| | - Jie Peng
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, China
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13
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Sultana S, Alzahrani N, Alzahrani R, Alshamrani W, Aloufi W, Ali A, Najib S, Siddiqui NA. Stability issues and approaches to stabilised nanoparticles based drug delivery system. J Drug Target 2020; 28:468-486. [PMID: 31984810 DOI: 10.1080/1061186x.2020.1722137] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Nanoparticles form the fundamental building blocks for many exciting applications in various scientific disciplines due to its unique features such as large surface to mass ratio, targeting potential, ability to adsorbed and carry other compound which makes them suitable for biomedical applications. However, the problem of the large-scale synthesis of nanoparticles remains challenging due to physical instability associated with nanoparticles which lead to generation of aggregates particles with high polydispersity index (PDI) indicating low particle homogeneity and eventually loss of their special nanoscale properties. The stabilisation concept can be generated by repulsive electrostatic force, which nanoparticles experience, when they are surrounded by a double layer of electric charges. Selection of proper stabiliser will govern the stability of NPs and ultimately development of optimised drug delivery system. This review summarises mechanism of physical instability issues likely to be encountered during the development of nanoformulations. It also discusses potential stabilising agents used so far and their mechanism in achieving stable nanosystems.
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Affiliation(s)
| | | | | | | | - Waad Aloufi
- Pharmaceutics, Taif University, Taif, Saudi Arabia
| | - Amena Ali
- Pharmaceutical Chemistry, Taif University, Taif, Saudi Arabia
| | - Shehla Najib
- Pharmacognosy and Phytochemistry, King Khalid University, Abha, Saudi Arabia
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14
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Thermodynamics of multi-walled carbon nanotube biofunctionalization using nisin: The effect of peptide structure. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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An Experimental and Theoretical Study of Biodegradable Gemini Surfactants and Surfactant/Carbon Nanotubes (CNTs) Mixtures as New Corrosion Inhibitor. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s40735-019-0274-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Zhang X, Song K, Liu J, Zhang Z, Wang C, Li H. Sorption of triclosan by carbon nanotubes in dispersion: The importance of dispersing properties using different surfactants. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.11.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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17
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Max JB, Pergushov DV, Sigolaeva LV, Schacher FH. Polyampholytic graft copolymers based on polydehydroalanine (PDha) – synthesis, solution behavior and application as dispersants for carbon nanotubes. Polym Chem 2019. [DOI: 10.1039/c8py01390j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We herein introduce a versatile platform of graft copolymers featuring a polyampholytic backbone and side chains of varying length and polarity using post-polymerization modification of polydehydroalanine (PDha).
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Affiliation(s)
- J. B. Max
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC)
- Friedrich-Schiller-University Jena
- D-07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - D. V. Pergushov
- Department of Chemistry
- M.V. Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - L. V. Sigolaeva
- Department of Chemistry
- M.V. Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - F. H. Schacher
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC)
- Friedrich-Schiller-University Jena
- D-07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
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18
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Li H, Wu W, Hao X, Wang S, You M, Han X, Zhao Q, Xing B. Removal of ciprofloxacin from aqueous solutions by ionic surfactant-modified carbon nanotubes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 243:206-217. [PMID: 30172990 DOI: 10.1016/j.envpol.2018.08.059] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 08/04/2018] [Accepted: 08/19/2018] [Indexed: 06/08/2023]
Abstract
Ionic surfactants may impact removal efficiency of organic contaminants from aqueous solution, but research regarding the adsorption mechanisms on surfactant-modified carbon nanotubes (CNTs) was limited. In this study, three multi-walled and one single-walled CNTs were used as adsorbents to investigate the adsorption behavior and mechanisms of ciprofloxacin (CIP) on CNTs modified by ionic surfactants (cationic CTAB (Cetyltrimethylamnonium bromide) or anionic SDS (Sodium dodecyl sulfate)). More than 80% (82-88%) of the total removed CIP on CTAB-modified CNTs occurred within the first 6 h, much higher than that on SDS-modified CNTs (57-78%). Modeling adsorption kinetics demonstrated that CIP adsorption on surfactant-modified CNTs was controlled by multiple and faster processes, and both external mass transfer and intraparticle diffusion are limiting factors. Relative to SDS, CTAB was significantly (P < 0.001) concentration-dependent in suppressing CIP removal. Besides, the increase in 1/n values of Freundlich model with increasing CTAB concentration suggested that CTAB could be a stronger competitor for CIP adsorption. Hydrophobic interactions predominated zwitterionic CIP adsorption on all CNTs tested, while electrostatic interactions could help control ionizable CIP adsorption on surfactant-modified CNTs depending upon pH. CIP adsorption on modified SWCNTs significantly declined with increasing ionic strength from 1 mM to 100 mM relative to those multi-walled CNTs because the more favorable aggregation of SWCNTs reduced the CIP adsorption, irrespective of which surfactant was added. Significant desorption hysteresis of adsorbed CIP released by SDS and water was observed, but not by CTAB, by which 32.6-54.4% of adsorbed CIP were removed. For SDS-modified CNTs, the mean release ratio (RR) followed an order of MWCNTs (0.075) > MHCNTs (0.058) > SWCNTs (0.057) > MCCNTs (0.049), significantly (P < 0.001) lower than CTAB-CNTs (0.37-0.56). It can be predicted that the tested surfactants co-existing with CNTs depress removal efficiency of diverse contaminants similar to CIP in aqueous systems.
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Affiliation(s)
- Haibo Li
- School of Agriculture, Jilin University of Agricultural Science & Technology, Jilin, 132101, China; Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA; National Field Research Station of Agro-ecosystem in Hailun, Northeast Institute of Geography and Agro-ecology, Chinese Academy of Sciences, Harbin, 150081, China
| | - Wenhao Wu
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA
| | - Xiangxiang Hao
- National Field Research Station of Agro-ecosystem in Hailun, Northeast Institute of Geography and Agro-ecology, Chinese Academy of Sciences, Harbin, 150081, China
| | - Shuai Wang
- School of Agriculture, Jilin University of Agricultural Science & Technology, Jilin, 132101, China
| | - Mengyang You
- National Field Research Station of Agro-ecosystem in Hailun, Northeast Institute of Geography and Agro-ecology, Chinese Academy of Sciences, Harbin, 150081, China
| | - Xiaozeng Han
- National Field Research Station of Agro-ecosystem in Hailun, Northeast Institute of Geography and Agro-ecology, Chinese Academy of Sciences, Harbin, 150081, China
| | - Qing Zhao
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA.
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Barbosa MB, Martins EMDN, Teixeira TF, Carvalho RDE, Coelho JP, Resende RR, Oliveira EF, Santos AP, Andrade ASRD, Furtado CA. A carefully designed nanoplatform based on multi walled carbon nanotube wrapped with aptamers. Colloids Surf B Biointerfaces 2018; 175:175-183. [PMID: 30530003 DOI: 10.1016/j.colsurfb.2018.11.064] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 11/21/2018] [Accepted: 11/26/2018] [Indexed: 02/01/2023]
Abstract
The interaction between carbon nanotubes (CNTs) and biological molecules of diagnostic and therapeutic interest, as well as the internalization of the CNTs-biomolecules complexes in different types of cell, has been extensively studied due to the potential use of these nanocomplexes as multifunctional nanoplatforms in a great variety of biomedical applications. The effective use of these nanobiotechnologies requires broad multidisciplinary studies of biocompatibility, regarding, for example, the in vitro and in vivo nanotoxicological assays, the capacity to target specific cells and the evaluation of their biomedical potential. However, the first step to be reached is the careful obtainment of the nanoplatform and the understanding of the actual surface composition and structural integrity of the complex system. In this work, we show the detailed construction of a nanoplatform created by the noncovalent interaction between oxidized multi walled carbon nanotubes (MWCNTs) and a DNA aptamer targeting tumor cells. The excess free aptamer was removed by successive washes, revealing the actual surface of the nanocomplex. The MWCNT-aptamer interaction by π-stacking was evidenced and shown to contribute in obtaining a stable nanocomplex compatible with aqueous media having good cell viability. The nucleotide sequence of the aptamer remained intact after the functionalization, allowing its use in further studies of specificity and binding affinity and for the construction of functional nanoplatforms.
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Affiliation(s)
| | | | | | | | - João Paulo Coelho
- Centro de Desenvolvimento da Tecnologia Nuclear, 31270-901 Belo Horizonte, MG, Brazil
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Keinänen P, Siljander S, Koivula M, Sethi J, Sarlin E, Vuorinen J, Kanerva M. Optimized dispersion quality of aqueous carbon nanotube colloids as a function of sonochemical yield and surfactant/CNT ratio. Heliyon 2018; 4:e00787. [PMID: 30225381 PMCID: PMC6139609 DOI: 10.1016/j.heliyon.2018.e00787] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 07/06/2018] [Accepted: 09/11/2018] [Indexed: 11/30/2022] Open
Abstract
In this paper, we propose and verify a theoretical model of the development of dispersion quality of aqueous carbon nanotube (CNT) colloid as a function of sonochemical yield of the sonication process. Four different surfactants; Triton X-100, Pluronic F-127, CTAB and SDS were studied. From these four SDS had the lowest dispersion performance which was surprising. Optical dispersion quality results fits well with proposed theoretical model.
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Affiliation(s)
- Pasi Keinänen
- Tampere University of Technology, Laboratory of Materials Science, P.O. Box 527, FIN-33101, Tampere, Finland
| | - Sanna Siljander
- Tampere University of Technology, Laboratory of Materials Science, P.O. Box 527, FIN-33101, Tampere, Finland
| | - Mikko Koivula
- Tampere University of Technology, Laboratory of Materials Science, P.O. Box 527, FIN-33101, Tampere, Finland
| | - Jatin Sethi
- University of Oulu, Fiber and Particle engineering research unit, P.O. Box 4300, FIN-90014, Oulu, Finland
| | - Essi Sarlin
- Tampere University of Technology, Laboratory of Materials Science, P.O. Box 527, FIN-33101, Tampere, Finland
| | - Jyrki Vuorinen
- Tampere University of Technology, Laboratory of Materials Science, P.O. Box 527, FIN-33101, Tampere, Finland
| | - Mikko Kanerva
- Tampere University of Technology, Laboratory of Materials Science, P.O. Box 527, FIN-33101, Tampere, Finland
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21
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Hu J, Lu K, Dong S, Huang Q, Mao L. Inactivation of Laccase by the Attack of As (III) Reaction in Water. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:2945-2952. [PMID: 29405708 DOI: 10.1021/acs.est.7b05650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Laccase is a multicopper oxidase containing four coppers as reaction sites, including one type 1, one type 2, and two type 3. We here provide the first experimental data showing that As (III) can be effectively removed from water and transformed to As (V) through reactions mediated by laccase with the presence of oxygen. To this end, the As (III) removal, As (V) yields, total protein, active laccase, and copper concentrations in the aqueous phase were determined, respectively. Additionally, electron paramagnetic resonance spectra and UV-vis spectra were applied to probe possible structural changes of the laccase during the reaction. The data offer the first evidence that laccase can be inactivated by As (III) attack thus leading to the release of type 2 copper. The released copper has no reactivity with the As (III). These findings provide new ideas into a significant pathway likely to master the environmental transformation of arsenite, and advance the understanding of laccase inactivation mechanisms, thus providing a foundation for optimization of enzyme-based processes and potential development for removal and remediation of arsenite contamination in the environment.
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Affiliation(s)
- Jinyuan Hu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment , Nanjing University , Nanjing 210093 , P. R. China
| | - Kun Lu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment , Nanjing University , Nanjing 210093 , P. R. China
| | - Shipeng Dong
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment , Nanjing University , Nanjing 210093 , P. R. China
| | - Qingguo Huang
- College of Agricultural and Environmental Sciences, Department of Crop and Soil Sciences , University of Georgia , Griffin , Georgia 30223 , United States
| | - Liang Mao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment , Nanjing University , Nanjing 210093 , P. R. China
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