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Zhao G, Shi W, Xin X, Yang Y, Ma F, Li Y. Insights from computational analysis: Excited-state hydrogen-bonding interactions and ESIPT processes in phenothiazine derivatives. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 286:121935. [PMID: 36265305 DOI: 10.1016/j.saa.2022.121935] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 09/16/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
Organic materials with Mechanofluorochromism (MFC) properties have potential application value. Phenothiazine derivatives are a class of substances with MFC properties that have been synthesized and reported in experiments (Dyes and Pigments 172 (2020) 107835). Dual fluorescence of a series of phenothiazine derivatives is observed in the experiment, which proved that the ESIPT process is carried out. In this work, we choose phenothiazine derivatives (C2PAHN, C4PAHN, C8PAHN) as models to theoretically analyze the influence of different alkyl chain lengths on the excited state intramolecular proton transfer (ESIPT). In addition, the shift value of fluorescence spectrum is related to the length of alkyl chain. The fluorescence shift of C2PAHN is the largest (6.31 nm), and that of C8PAHN is the smallest (2.40 nm). The theory of density functional theory (DFT) and time-dependent density functional theory (TD-DFT) are adopted to simulate the molecular dynamics in the ground state and excited state. The analysis of the optimized molecular geometry parameters and infrared vibrational spectroscopy (IR) illustrate the stronger hydrogen bonding of the excited state molecules, which is favorable for the progress of ESIPT. Fluorescence spectroscopy reveals that the appropriate increase or decrease of alkyl chains would change the photophysical properties of the molecules. Frontier molecular orbitals (FMOs) indicate that the rearrangement of electron density from electronic level to is the driving force of the ESIPT process. Reduction density gradient (RDG) surfaces and Natural Population Analysis (NPA) tentatively lead to the conclusion that alkyl chain length is inversely proportional to hydrogen bond strength. Finally, the data are qualitatively analyzed by scanning the potential energy curves, and it is concluded that the longer the alkyl chain, the weaker the hydrogen bonding effect and the more unfavorable the ESIPT process.
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Affiliation(s)
- Guijie Zhao
- School of Physics, Liaoning University, Shenyang 110036, PR China
| | - Wei Shi
- School of Physics, Liaoning University, Shenyang 110036, PR China
| | - Xin Xin
- School of Physics, Liaoning University, Shenyang 110036, PR China
| | - Yunfan Yang
- Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, PR China
| | - Fengcai Ma
- School of Physics, Liaoning University, Shenyang 110036, PR China.
| | - Yongqing Li
- School of Physics, Liaoning University, Shenyang 110036, PR China.
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Solvent controlled excited state intramolecular proton transfer (ESIPT) behavior and luminescent property of a novel phthalimide-based fluorophore: A TD-DFT Study. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Unravelling the Methylene Blue Adsorption Mechanism on Doped and Nondoped Polyaniline: A Combined Molecular Modeling and Experimental Investigation. INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING 2022. [DOI: 10.1155/2022/3181963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A multiscale investigation including computational chemistry calculations and experimental studies was performed to elucidate and understand the methylene blue (MB) adsorption on polyaniline (PANI) from an aqueous solution. Static DFT and DFT-based ab initio molecular dynamics were used to characterize the intermolecular interactions of this dye molecule with nondoped and doped PANI. Experimental adsorption studies at different operating conditions were performed to complement the mechanism analysis of this adsorption system. Infrared spectroscopy studies and ab initio calculations showed the important role of π-π stacking and van der Waals interactions for the dye adsorption on PANI. Experimental results of MB adsorption on the PANI surface indicated that alkaline conditions were more favorable than acidic conditions where the MB adsorption capacity ranged from 9.91 mg/g at pH 1.8 to 23.16 mg/g at pH 10.9. Equilibrium adsorption studies with nondoped PANI revealed a fast removal of the dye molecules where the equilibrium adsorption was reached after 45 minutes. The kinetic parameters were calculated with the pseudo-second and pseudo-first order models, while the adsorption mechanism was analyzed using the intraparticle diffusion, Boyd, and Elovich models. Dye adsorption equilibrium was studied at pH 8 and 30 °C where Temkin, Freundlich, Langmuir, and Dubinin-Radushkevich (D-R) isotherm models as well as a statistical physics monolayer model were employed in data analysis. The saturation dye adsorption capacity was 40.2 mg/g where an inclined adsorption orientation of dye molecules on the PANI surface could be expected with an adsorption energy of 14.0 kJ/mol. This interaction energy clearly indicated that only physical interactions were involved in the MB dye adsorption mechanism, which was also confirmed by the calculations with the D-R isotherm model. These theoretical and experimental results are important to understand the dye adsorption properties of conductive polymers and to consolidate their application in the synthesis of new adsorbents and composites for water treatment.
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Zhao G, Shi W, Xin X, Ma F, Li Y. Solvent dependence of ESIPT process in 2-(2-carbonmethoxy-3,4-dichloro-6-hydroxyphenyl) compounds. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118807] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Stejskal J, Pekárek M, Trchová M, Kolská Z. Adsorption of organic dyes on macroporous melamine sponge incorporating conducting polypyrrole nanotubes. J Appl Polym Sci 2022. [DOI: 10.1002/app.52156] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jaroslav Stejskal
- Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic Prague 6 Czech Republic
| | - Michal Pekárek
- Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic Prague 6 Czech Republic
| | - Miroslava Trchová
- University of Chemistry and Technology, Prague Prague 6 Czech Republic
| | - Zdeňka Kolská
- Faculty of Science J.E. Purkyně University Ústí nad Labem Czech Republic
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Yang Y, Liu Y, Jiang K, Liu Y. Fluorescent detection mechanism of CO-releasing molecule-3: Competition of inter-/intra-molecular hydrogen bonds. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 263:120227. [PMID: 34332242 DOI: 10.1016/j.saa.2021.120227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 07/14/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
The fluorescent detection mechanism of 2-(4-nitro-1,3-dioxoisoindolin-2-yl) acetic acid (CORM3-green) on CO-Releasing Molecule-3 (CORM-3) is theoretically studied. Upon reaction with CORM-3, the non-fluorescent CORM3-green is transferred to the keto form of 2-(4-amino-1,3-dioxoisoindolin-2-yl)acetic acid (PTI) to produce strong fluorescence peak located at 423 nm. This peak red-shifts to 489 nm, which is induced by the strengthening of intermolecular hydrogen bond (HB) between PTI and water molecules and attributed to the experimentally observed fluorescence emission at 503 nm. This result is dramatically different from previous reports that the experimental fluorescence corresponds to the proton transferred enol form of PTI. To illustrate this confusion, the calculated fluorescence peak of PTI-Enol is located at 689 nm, which is much larger than that of experimental result. This result excludes the occurrence of excited state intramolecular proton transfer (ESIPT). It is concluded that intermolecular HBs hinders the formation of intramolecular HB and the ESIPT of the keto form of PTI. This conclusion confirms that experimental Stokes shift of 113 nm is mainly caused by the intermolecular hydrogen bonding rather than by ESIPT process. This work proposes a reasonable explanation for the detection mechanism of CORM3-green and experimental fluorescence phenomenon.
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Affiliation(s)
- Yonggang Yang
- Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang 453007, China.
| | - Yang Liu
- Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang 453007, China
| | - Kai Jiang
- School of Environment, Henan Normal University, Xinxiang 453007, China
| | - Yufang Liu
- Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang 453007, China.
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Wang S, Huang Y, Wu Y, Zhang X, Wan L, Liu X, Zhang W. Re-utilization of Chinese medicinal herbal residue: waste wormwood rod-derived porous carbon as a low-cost adsorbent for methyl orange removal. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 84:2601-2614. [PMID: 34810334 DOI: 10.2166/wst.2021.453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A cost-effective approach was applied to prepare porous carbon samples by the simple carbonization of wormwood rod followed by salt activator (NaCl) activation. The effect of preparation parameters on the characteristics of the wormwood rod-based porous carbons (WWRs) were studied. The properties of these samples were investigated by SEM, BET surface area, X-ray diffraction, FT-IR spectra and X-ray photoelectron spectrometer. The prepared WWRs were applied as new adsorbent materials to remove methyl orange (MO). The experimental results indicated that WWR-800 activated at 800 °C possesses the best adsorption performance. Several factors that affected the adsorption property of the system such as the solution pH, dosing of adsorbent, initial dye concentration and ionic strength were examined. In addition, the thermodynamic parameters and kinetic parameters of MO with WWR-800 were studied. The results indicated that the adsorption of MO on WWR-800 was an endothermic process and non-spontaneous under standard conditions. The maximum equilibrium adsorption capacity of MO on WWR-800 was 454.55 mg/g. After five adsorption/desorption cycles, the adsorption capacity of MO on WWR-800 remained at 94%, which indicated that wormwood rod-based porous carbon possessed good reusability.
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Affiliation(s)
- Shuhui Wang
- Hubei Key Lab for Processing and Application of Catalytic Materials, Huanggang Normal University, Huanggang, Hubei 438000, China E-mail: ; Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, College of Materials and Chemical Engineering, Three Gorges University, Yichang, Hubei 443002, China
| | - Yu Huang
- Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, College of Materials and Chemical Engineering, Three Gorges University, Yichang, Hubei 443002, China
| | - Yiting Wu
- Hubei Key Lab for Processing and Application of Catalytic Materials, Huanggang Normal University, Huanggang, Hubei 438000, China E-mail:
| | - Xinyu Zhang
- Hubei Key Lab for Processing and Application of Catalytic Materials, Huanggang Normal University, Huanggang, Hubei 438000, China E-mail:
| | - Liu Wan
- Hubei Key Lab for Processing and Application of Catalytic Materials, Huanggang Normal University, Huanggang, Hubei 438000, China E-mail:
| | - Xiang Liu
- Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, College of Materials and Chemical Engineering, Three Gorges University, Yichang, Hubei 443002, China
| | - Wanju Zhang
- Hubei Key Lab for Processing and Application of Catalytic Materials, Huanggang Normal University, Huanggang, Hubei 438000, China E-mail:
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Yang Y, Luo X, Ma F, Li Y. Substituent effect on ESIPT mechanisms and photophysical properties of HBT derivatives. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 250:119375. [PMID: 33421666 DOI: 10.1016/j.saa.2020.119375] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 12/05/2020] [Accepted: 12/20/2020] [Indexed: 06/12/2023]
Abstract
Substituent effects on excited-state intramolecular proton transfer (ESIPT) and photophysical properties of 2-(2-Hydroxyphenyl) benzothiazole (HBT) derivatives have been theoretically unveiled via the density functional theory (DFT) and time-dependent DFT (TDDFT). The optimized geometrical configurations and normal mode analyses confirm that the proton transfer processes are more reactive in excited state. Through calculating the activation energies and rate constants of ESIPT processes, finding that the processes are increasingly inactive when substituent group changes from -CN, -CO2Me, -Cl, -Me, -NMe2 to -NO2. In addition, the photophysical properties analyses indicate the vertical transition energies are in good agreement with those observed in experiment. Note that all the absorption and emission maxima of enol and keto forms have the significant red-shift. In order to clarify the substituent effect on ESIPT and photophysical properties, we draw the frontier molecular orbitals (FMOs) isosurfaces and calculate the distances of electrons and holes and atomic charges. It follows that the intramolecular charge transfer (ICT) degrees are increasingly enlarged as substituting from -CN, -CO2Me, -Cl, -Me, -NMe2 to -NO2 groups, which not only causes the red-shift of absorption and emission of enol and keto forms, but also affects the charge distribution of proton donor and acceptor, inhibiting the occurrence of ESIPT processes.
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Affiliation(s)
- Yunfan Yang
- Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, PR China; School of Physics, Liaoning University, Shenyang 110036, PR China.
| | - Xiao Luo
- School of Physics, Liaoning University, Shenyang 110036, PR China
| | - Fengcai Ma
- School of Physics, Liaoning University, Shenyang 110036, PR China
| | - Yongqing Li
- School of Physics, Liaoning University, Shenyang 110036, PR China.
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Yu HY, Li HJ, Ma YY, Feng YX, Qian DJ. Interfacial self-assembly of carbon nitride-based nanocomposites with zinc terpyridyl coordination polymers for photocurrent generation and the photocatalytic degradation of organic dyes. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124702] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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10
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Facile fabrication of self-assembled lamellar PANI-GO-Fe3O4 hybrid nanocomposites with enhanced adsorption capacities and easy recyclicity towards ionic dyes. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124147] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Stejskal J. Interaction of conducting polymers, polyaniline and polypyrrole, with organic dyes: polymer morphology control, dye adsorption and photocatalytic decomposition. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-00982-9] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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12
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Siddiqui SI, Zohra F, Chaudhry SA. Nigella sativa seed based nanohybrid composite-Fe 2O 3-SnO 2/BC: A novel material for enhanced adsorptive removal of methylene blue from water. ENVIRONMENTAL RESEARCH 2019; 178:108667. [PMID: 31454728 DOI: 10.1016/j.envres.2019.108667] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 08/12/2019] [Accepted: 08/13/2019] [Indexed: 06/10/2023]
Abstract
In this work, an advance approach is reported for the water treatment technology using nanohybrid composite Fe2O3-SnO2/BC prepared by incorporation of iron-tin binary oxide into the cellulosic framework of medicinally active Nigella sativa (Black cumin) seed powder. The co-precipitation method was followed to prepare the nanohybrid composite which was subjected to investigate its physiochemical properties using spectroscopic and microscopic techniques. Fourier-transform infrared spectroscopy analysis confirmed the formation of highly functionalized nanocomposite through the hydrogen and electrostatic interactions between the functional groups of seeds and Fe2O3-SnO2. X-ray and selected area electron diffraction pattern revealed the presence of cubic phase of γ-Fe2O3 and tetragonal phase of SnO2 in the composite. The scanning electron microscopic images suggested the porous and relatively smooth surface of the composite, and transmittance electron microscopic images showed the trapping of nano-cubes of Fe2O3-SnO2, having particles size in the range 95-185 nm, into the organic framework of Black cumin seeds, whose zero point charge was found at pH 7.2. The composite was investigated for adsorption of Methylene blue dye from water for which the results revealed that 2.0 gL-1 amount of Fe2O3-SnO2/BC was sufficient to remove more than 95% dye, within 15 min, at 6-9 pH, from its 10 mgL-1 concentration. The thermodynamic studies established spontaneity, feasibility, and endothermic nature of the adsorption process. The adsorption data was satisfactorily described by the Freundlich isotherm which indicated inhomogeneous surface of the composite. Application of Temkin isotherm revealed the same extent of bonding probability and heat of adsorption at 27, 35, and 45 °C. The free energy change calculated from Dubinin-Radushkevich isotherm suggested weak interaction between Methylene blue and Fe2O3-SnO2/BC. The process satisfactorily followed the pseudo-second order kinetics that was controlled by the film diffusion step which indicated interaction of Methylene blue with functional sites of the Fe2O3-SnO2/BC. The Fourier-transform infrared spectroscopy analysis gave the confirmatory evidence for interaction of Methylene blue to Fe2O3-SnO2/BC. The maximum Langmuir adsorption capacity of the Fe2O3-SnO2/BC was found to be 58.82 mgg-1 at 27 °C which is higher than the previously reported adsorbents, MnFe2O4/BC [J. Clean. Prod. 2018. 200, 996-1008], and Fe2O3-ZrO2/BC [J. Clean. Prod. 2019. 223, 849-868]. Therefore, the study showed excellent results for water treatment and can be useful to develop advance water treatment technology.
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Affiliation(s)
- Sharf Ilahi Siddiqui
- Environmental Chemistry Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, India
| | - Fatima Zohra
- Environmental Chemistry Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, India
| | - Saif Ali Chaudhry
- Environmental Chemistry Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, India.
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Wang N, Chen J, Wang J, Feng J, Yan W. Removal of methylene blue by Polyaniline/TiO2 hydrate: Adsorption kinetic, isotherm and mechanism studies. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2019.02.049] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Siddiqui SI, Manzoor O, Mohsin M, Chaudhry SA. Nigella sativa seed based nanocomposite-MnO 2/BC: An antibacterial material for photocatalytic degradation, and adsorptive removal of Methylene blue from water. ENVIRONMENTAL RESEARCH 2019; 171:328-340. [PMID: 30711734 DOI: 10.1016/j.envres.2018.11.044] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 11/25/2018] [Accepted: 11/28/2018] [Indexed: 06/09/2023]
Abstract
Antimicrobial Nigella sativa seed-based nanocomposite, MnO2/BC, was synthesized and utilized for the water purification through adsorption, and the photocatalytic degradation. MnO2/BC was prepared by co-precipitation method, and characterized using FT-IR, XRD, SEM, TEM, TGA, and DSC techniques. The composite was investigated for inhibition of bacterial cells growth. FT-IR spectrum indicated the presence of oxygenous groups on the surface; TGA and DSC showed thermal degradation; and XRD, SEM, and TEM investigations indicated amorphous, and porous nature of MnO2/BC having particle size of 190-220 nm. The nanocomposite inhibited the growth of both Gram-positive and Gram-negative bacteria cells in water. The adsorption of Methylene blue from water was investigated in batch method in terms of amount of MnO2/BC, dye concentration, pH, time, and temperature. 1.0 g L-1 of MnO2/BC removed more than 98% of Methylene blue from aqueous solution having concentration of 10 mg L-1 and pH 7.0 at 27 °C. The maximum Langmuir adsorption capacity of MnO2/BC was 185.185 mg g-1 at 45 °C. The adsorption was an endothermic process which obeyed Freundlich isotherm, and pseudo-second order kinetics. Therefore, the Methylene blue binding onto MnO2/BC surface was site-specific partially through the weak hydrogen bonding, and electrostatic interactions. The photocatalytic activity of MnO2/BC has been investigated by degrading the Methylene blue molecules/ions in water under the sunlight and 85% of degradation was achieved during 120 min irradiation. The dye was desorbed at lower pH and regenerated MnO2/BC was used for second cycle of Methylene blue adsorption. The results obtained for this study are much better than the previous Methylene blue adsorption studies with acid washed Black cumin seeds and MnFe2O4/BC for which the capacities were 73.529 mg g-1 and 10.070 mg g-1 at 27 °C, respectively (J. Mol. liq. 2018a, 264, 275-284; J. Clean. Prod. 2018a, 200, 996-1008).
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Affiliation(s)
| | - Ovais Manzoor
- Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Mohd Mohsin
- Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Saif Ali Chaudhry
- Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
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Chauhan M, Sharma B, Kumar R, Chaudhary GR, Hassan AA, Kumar S. Green synthesis of CuO nanomaterials and their proficient use for organic waste removal and antimicrobial application. ENVIRONMENTAL RESEARCH 2019; 168:85-95. [PMID: 30278366 DOI: 10.1016/j.envres.2018.09.024] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 09/12/2018] [Accepted: 09/19/2018] [Indexed: 05/12/2023]
Abstract
Copper oxide (CuO) nanomaterials (NMs) of different size and morphology were synthesized by Chemical precipitation, Microwave irradiation and Hydrothermal method and characterized by TEM, BET, FTIR, XRD and EDX analysis. As synthesized CuO NMs were utilized for elimination of harmful dyes viz. Direct Red 81 (DR-81) and Coomassie Brilliant blue R-250 (BBR-250) and pathogenic bacteria (Staphylococcus aureus). Owing to their morphology, smaller size and relatively high surface area (40.320 m2 g-1), CuO NMs prepared by chemical precipitation method were observed to show better adsorption capacity for both the dyes (68.70 (DR-81) and 73.04 (BBR-250) mg g-1). The influence of different experimental conditions was studied by the methodical assessments of various parameters such as pH, adsorbent dose, concentration and contact time. Moreover, different adsorption isotherms and pseudo-second order kinetic model were applied to understand the adsorption mechanism. Langmuir model was found to be best fit thus confirming the monolayer adsorption process. To ensure the practical utility of CuO NMs for organic waste removal, the adsorption studies were performed in the presence of different inorganic ions and real water samples. In addition, recovery of the dye and NMs were also carried out effectively by simple method, thus avoiding the secondary pollution. CuO NMs were observed to exhibit significant antibacterial activity against the human pathogenic bacteria. These studies demonstrated that synthesized CuO NMs showed good adsorption efficiency for the removal of harmful dyes and antimicrobial activity against the pathogenic bacteria, which vary as a function of size and surface area.
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Affiliation(s)
- Moondeep Chauhan
- Department of Chemistry & Center of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India; Department of Environment Studies, Panjab University, Chandigarh 160014, India
| | - Bindu Sharma
- Department of Chemistry & Center of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
| | - Rajeev Kumar
- Department of Environment Studies, Panjab University, Chandigarh 160014, India
| | - Ganga Ram Chaudhary
- Department of Chemistry & Center of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India.
| | - Ashraf Aly Hassan
- Department of Civil Engineering, University of Nebraska Lincoln, P.O. Box 886105, Lincoln, NE 68588-6105, United States
| | - Sandeep Kumar
- Department of Civil Engineering, University of Nebraska Lincoln, P.O. Box 886105, Lincoln, NE 68588-6105, United States; Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India.
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Hao H, Wang Y, Shi B, Han K, Zhuang Y, Kong Y, Huang X. Strong enhancement of methylene blue removal from binary wastewater by in-situ ferrite process. J Environ Sci (China) 2018; 73:107-116. [PMID: 30290859 DOI: 10.1016/j.jes.2018.01.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 01/18/2018] [Accepted: 01/19/2018] [Indexed: 06/08/2023]
Abstract
Dye wastewater containing heavy metal ions is a common industrial effluent with complex physicochemical properties. The treatment of metal-dye binary wastewater is difficult. In this work, a novel in-situ ferrite process (IFP) was applied to treat Methylene Blue (MB)-Cu(II) binary wastewater, and the operational parameters were optimized for MB removal. Results showed that the optimum operating conditions were OH/M of 1.72, Cu2+/Fe2+ ratio of 1/2.5, reaction time of 90min, aeration intensity of 320mL/min, and reaction temperature of 40°C. Moreover, the presence of Ca2+ and Mg2+ moderately influenced the MB removal. Physical characterization results indicated that the precipitates yielded in IFP presented high surface area (232.50m2/g) and a multi-porous structure. Based on the Langmuir model, the maximum adsorption capacity toward MB was 347.82mg/g for the precipitates produced in IFP, which outperformed most other adsorbents. Furthermore, IFP rapidly sequestered MB with removal efficiency 5 to 10 times greater than that by general ferrite adsorption, which suggested a strong enhancement of MB removal by IFP. The MB removal process by IFP showed two different high removal stages, each with a corresponding removal mechanism. In the first brief stage (<5min), the initial high MB removal (~95%) was achieved by predominantly electrostatic interactions. Then the sweep effect and encapsulation were dominant in the second longer stage.
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Affiliation(s)
- Haotian Hao
- College of Environmental Science and Engineering, Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China
| | - Yili Wang
- College of Environmental Science and Engineering, Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China.
| | - Baoyou Shi
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kun Han
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Yuan Zhuang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yan Kong
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Xin Huang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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Herrera MU, Futalan CM, Gapusan R, Balela MDL. Removal of methyl orange dye and copper (II) ions from aqueous solution using polyaniline-coated kapok (Ceiba pentandra) fibers. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 78:1137-1147. [PMID: 30339538 DOI: 10.2166/wst.2018.385] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Hollow tubular structured kapok fibers (Ceiba pentandra) were coated with polyaniline (PANI) molecules using an in situ oxidative polymerization technique. The tubular morphology of the kapok fibers was retained after PANI coating. The Fourier transform infrared (FT-IR) spectrum of the PANI-coated kapok fibers illustrated the vibration modes associated with the presence of PANI molecules. The PANI-treated kapok fibers achieved complete wettability with water molecules (zero water contact angle) from initially being highly hydrophobic (contact angle = 120°). In the present work, the removal of contaminants such as methyl orange dye and Cu(II) from aqueous solution using polyaniline-coated kapok fibers was investigated. Isotherm studies show that the removal of methyl orange dye (R2 ≥ 0.959) and Cu(II) (R2 ≥ 0.972) using PANI-coated kapok fibers follow the Langmuir isotherm model with maximum sorption capacities determined to be 75.76 and 81.04 mg/g, respectively. Based from thermodynamic studies, the sorption of methyl orange dye and Cu(II) are endothermic, feasible and spontaneous. Furthermore, kinetic studies show that the both processes follow a pseudo-second-order model, implying that the rate-determining step is chemisorption.
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Affiliation(s)
- Marvin U Herrera
- Institute of Mathematical Sciences and Physics, College of Arts and Sciences, University of the Philippines Los Baños, Laguna, 4031, Philippines E-mail:
| | - Cybelle M Futalan
- Environment Business Line, Aecom Philippines Consultants Corporation, Bonifacio Global City, Fort Bonifacio, Taguig 1634, Philippines
| | - Rontgen Gapusan
- Sustainable Electronic Materials Group, Department of Mining, Metallurgical and Materials Engineering, College of Engineering University of the Philippines Diliman, Quezon City 1101, Philippines
| | - Mary Donnabelle L Balela
- Sustainable Electronic Materials Group, Department of Mining, Metallurgical and Materials Engineering, College of Engineering University of the Philippines Diliman, Quezon City 1101, Philippines
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Synthesis of magnetic 3D graphene decorated with CaCO3 for anionic azo dye removal from aqueous solution: Kinetic and RSM modeling approach. Chem Eng Res Des 2018. [DOI: 10.1016/j.cherd.2018.06.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Verma P, Samanta SK. Facile synthesis of TiO2–PC composites for enhanced photocatalytic abatement of multiple pollutant dye mixtures: a comprehensive study on the kinetics, mechanism, and effects of environmental factors. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-3209-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Removal of metal complexed azo dyes from aqueous solution using tris(2-aminoethyl)amine ligand modified magnetic p(GMA-EGDMA) cationic resin: Adsorption, isotherm and kinetic studies. Chem Eng Res Des 2017. [DOI: 10.1016/j.cherd.2017.06.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Adsorption of metanil yellow from aqueous solution using polyaniline-bentonite composite. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4098-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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