1
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Fujii Y, Ioka H, Minamoto C, Kurisaki I, Tanaka S, Ohta K, Tominaga K. Vibrational frequency fluctuations of poly(N,N-diethylacrylamide) in the vicinity of coil-to-globule transition studied by two-dimensional infrared spectroscopy and molecular dynamics simulations. J Chem Phys 2024; 161:064903. [PMID: 39120037 DOI: 10.1063/5.0218180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Accepted: 07/24/2024] [Indexed: 08/10/2024] Open
Abstract
Poly(N,N-diethylacrylamide) (PdEA), one of the thermoresponsive polymers, in aqueous solutions has attracted much attention because of its characteristic properties, such as coil-to-globule (CG) transition. We performed two-dimensional infrared spectroscopy and molecular dynamics (MD) simulations to understand the hydration dynamics in the vicinity of the CG transition at the molecular level via vibrational frequency fluctuations of the carbonyl stretching modes in the side chains of PdEA. Furthermore, N,N-diethylpropionamide, a repeating monomer unit of PdEA, is also investigated for comparison. From decays of the frequency-frequency time correlation functions (FFTCFs) of the carbonyl stretching modes, we consider that inhomogeneity of the hydration environments originates from various backbone configurations of PdEA. The degree of the inhomogeneity depends on temperature. Hydration water molecules near the carbonyl groups are influenced by the confinements of the polymers. The restricted reorientation of the embedded water, the local torsions of the backbone, and the rearrangement of the whole structure contribute to the slow spectral diffusion. By performing MD simulations, we calculated the FFTCFs and dynamical quantities, such as fluctuations of the dihedral angles of the backbone and the orientation of the hydration water molecules. The simulated FFTCFs match well with the experimental results, indicating that the retarded water reorientations via the excluded volume effect play an important role in the vibrational frequency fluctuations of the carbonyl stretching mode. It is also found the embedded water molecules are influenced by the local torsions of the backbone structure within the time scales of the spectral diffusion.
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Affiliation(s)
- Yuki Fujii
- Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai-cho 1-1, Nada, Kobe 657-8501, Japan
| | - Hikaru Ioka
- Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai-cho 1-1, Nada, Kobe 657-8501, Japan
| | - Chihiro Minamoto
- Department of Applied Chemistry and Biotechnology, Niihama National College of Technology, Yakumo-cho 7-1, Niihama, Ehime 792-8580, Japan
| | - Ikuo Kurisaki
- Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Shigenori Tanaka
- Department of Computational Science, Graduate School of System Informatics, Kobe University, Rokkodai-cho 1-1, Nada, Kobe 657-8501, Japan
| | - Kaoru Ohta
- Molecular Photoscience Research Center, Kobe University, Rokkodai-cho 1-1, Nada, Kobe 657-8501, Japan
| | - Keisuke Tominaga
- Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai-cho 1-1, Nada, Kobe 657-8501, Japan
- Molecular Photoscience Research Center, Kobe University, Rokkodai-cho 1-1, Nada, Kobe 657-8501, Japan
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2
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Singh R, Umapathi A, Patel G, Patra C, Malik U, Bhargava SK, Daima HK. Nanozyme-based pollutant sensing and environmental treatment: Trends, challenges, and perspectives. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 854:158771. [PMID: 36108853 DOI: 10.1016/j.scitotenv.2022.158771] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 09/10/2022] [Accepted: 09/10/2022] [Indexed: 06/15/2023]
Abstract
Nanozymes are defined as nanomaterials exhibiting enzyme-like properties, and they possess both catalytic functions and nanomaterial's unique physicochemical characteristics. Due to the excellent stability and improved catalytic activity in comparison to natural enzymes, nanozymes have established a wide base for applications in environmental pollutants monitoring and remediation. Nanozymes have been applied in the detection of heavy metal ions, molecules, and organic compounds, both quantitatively and qualitatively. Additionally, within the natural environment, nanozymes can be employed for the degradation of organic and persistent pollutants such as antibiotics, phenols, and textile dyes. Further, the potential sphere of applications for nanozymes traverses from indoor air purification to anti-biofouling agents, and even they show promise in combatting pathogenic bacteria. However, nanozymes may have inherent toxicity, which can restrict their widespread utility. Thus, it is important to evaluate and monitor the interaction and transformation of nanozymes towards biosphere damage when employed within the natural environment in a cradle-to-grave manner, to assure their utmost safety. In this context, various studies have concluded that the green synthesis of nanozymes can efficiently overcome the toxicity limitations in real life applications, and nanozymes can be well utilized in the sensing and degradation of several toxic pollutants including metal ions, pesticides, and chemical warfare agents. In this seminal review, we have explored the great potential of nanozymes, whilst addressing a range of concerns, which have often been overlooked and currently restrict widespread applications and commercialization of nanozymes.
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Affiliation(s)
- Ragini Singh
- College of Agronomy, Liaocheng University, 252059, Shandong, China
| | - Akhela Umapathi
- Amity Center for Nanobiotechnology and Nanomedicine (ACNN), Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur 303002, Rajasthan, India
| | - Gaurang Patel
- Amity Center for Nanobiotechnology and Nanomedicine (ACNN), Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur 303002, Rajasthan, India
| | - Chayan Patra
- Amity Center for Nanobiotechnology and Nanomedicine (ACNN), Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur 303002, Rajasthan, India
| | - Uzma Malik
- Centre for Advanced Materials and Industrial Chemistry, School of Science, RMIT University, Melbourne 3000, Victoria, Australia
| | - Suresh K Bhargava
- Centre for Advanced Materials and Industrial Chemistry, School of Science, RMIT University, Melbourne 3000, Victoria, Australia.
| | - Hemant Kumar Daima
- Amity Center for Nanobiotechnology and Nanomedicine (ACNN), Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur 303002, Rajasthan, India.
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3
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Kozhunova EY, Komarova GA, Anakhov MV, Gumerov RA, Potemkin II. Swift Janitor: Efficient Absorption of a Minor Component from the Mixtures of Immiscible Liquids by Thermoresponsive Macroscopic and Microscopic Hydrogels. ACS APPLIED MATERIALS & INTERFACES 2022; 14:57244-57250. [PMID: 36512418 DOI: 10.1021/acsami.2c17402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Polymer hydrogels are known to be efficient absorbents of various aqueous solutions. Along with the hydrophilicity of the polymer network, the presence of specific functional groups is required for the absorption of respective solutes. Alternatively, a selective uptake can be realized without any specific attraction of solutes to the network, which is shown in this paper. By combining experimental and simulation approaches, we demonstrated that thermoresponsive poly(N-isopropylacrylamide) gels and microgels in compositionally strongly asymmetric water/1-octanol mixtures selectively uptake the minor (1-octanol) component. Initially swollen in water, the gels substitute water by the organic solvent upon the addition of its small fraction into aqueous solution. In turn, for microgels, it was shown that the single particles could absorb the amount of the organic liquid more than two times higher than their mass while preserving the colloidal stability. At the same time, the accumulation of 1-octanol in the networks "switches off" the temperature response. The mesoscopic computer simulations revealed a physical reason and molecular picture of the phenomenon. Absorption of the minor component by the gels is caused by the decrease in water/1-octanol interfacial tension due to the formation of the dense polymer layer at the interface. The simulations allowed tracking the evolution of the size and the internal structure of the single microgels with changing 1-octanol concentration.
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Affiliation(s)
- Elena Yu Kozhunova
- Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation
| | - Galina A Komarova
- Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation
| | - Mikhail V Anakhov
- Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation
| | - Rustam A Gumerov
- Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation
| | - Igor I Potemkin
- Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation
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4
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Jyoti Bora H, Paul C, Sen Sarma N, Kalita A. Facile Synthesis of Regenerative Framework Adsorbent for Organic Dyes: Experimental and Artificial Neural Modeling Studies. ChemistrySelect 2022. [DOI: 10.1002/slct.202203766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- Hridoy Jyoti Bora
- Physical Sciences Division Institute of Advanced Study in Science and Technology Paschim Boragaon Guwahati 781035 Assam India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Chayan Paul
- Department of Artificial Intelligence and Data Science Koneru Lakshmaiah Education Foundation Vaddeswaram 522302 Andhra Pradesh India
| | - Neelotpal Sen Sarma
- Physical Sciences Division Institute of Advanced Study in Science and Technology Paschim Boragaon Guwahati 781035 Assam India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Anamika Kalita
- Physical Sciences Division Institute of Advanced Study in Science and Technology Paschim Boragaon Guwahati 781035 Assam India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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5
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Balasurya S, Okla MK, Alaraidh IA, Al-Ghamdi AA, Mohebaldin A, Abdel-Maksoud MA, Abdelaziz RF, Thomas AM, Raju LL, Khan SS. Sunlit photocatalytic degradation of organic pollutant by NiCr 2O 4/Bi 2S 3/Cr 2S 3 tracheid skeleton nanocomposite: Mechanism, pathway, reactive sites, genotoxicity and byproduct toxicity evaluation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 319:115674. [PMID: 35868190 DOI: 10.1016/j.jenvman.2022.115674] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 06/29/2022] [Accepted: 07/02/2022] [Indexed: 06/15/2023]
Abstract
In this study, 3D C2S3 (CS) and 2D Bi2S3 (BS) modified NiCr2O4 nanocomposite (NCO-BS-CS NCs) was prepared by sonochemical assisted co-precipitation method for the enhanced photocatalytic activity. Here, NCO-BS-CS NCs showed band gap energy of 2.23 eV and the PL intensity of NCO-BS-CS NCs was lower than NCO, BS, and CS NPs. Thus, the results indicate the fabricated NCO-BS-CS NCs enhance the charge segregation and lower in recombination rate. NCO-BS-CS NCs showed enhanced photodegradation of methyl orange (MO) (95%) and congo red (CR) (99.7%) respectively. The total organic compound (TOC) analysis shows the complete mineralization of about 91 and 98% for MO and CR respectively. Furthermore, the Fukui function was used for the prediction of reactive sites in the photodegradation pathway of MO and CR by NCs. ECOSAR program was done to determine the toxicity of the intermediate and the results conclude that the degraded product shows nontoxic to the environmental organism (fish, daphnia, and algae). Thus, the fabricated NCO-BS-CS NCs can be used for the remediation of toxic organic pollutants from the waste water by photocatalytic degradation.
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Affiliation(s)
- S Balasurya
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India
| | - Mohammad K Okla
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Ibrahim A Alaraidh
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Abdullah A Al-Ghamdi
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Asmaa Mohebaldin
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Mostafa A Abdel-Maksoud
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Ramadan F Abdelaziz
- Department of Pharmaceutical Sciences, Division of Pharmacology and Toxicology, University of Vienna, Austria
| | - Ajith M Thomas
- Department of Botany and Biotechnology, St Xavier's College, Thumba, Thiruvananthapuram, India
| | - Lija L Raju
- Department of Zoology, Mar Ivanios College, Nalanchira, Thiruvananthapuram, India
| | - S Sudheer Khan
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India.
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Rana MM, Natale G, Siegler HDLH. A Greener Route for Smart PNIPAm Microgel Synthesis Using a Bio-Based Synthesis-Solvent. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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7
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Balasurya S, Okla MK, Mohebaldin A, Al-Ghamdi AA, Abdel-Maksoud MA, Almunqedhi B, AbdElgawad H, Thomas AM, Raju LL, Khan SS. Self-assembling of 3D layered flower architecture of BiOI modified MgCr 2O 4 nanosphere for wider spectrum visible-light photocatalytic degradation of rhodamine B and malachite green: Mechanism, pathway, reactive sites and toxicity prediction. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 308:114614. [PMID: 35121463 DOI: 10.1016/j.jenvman.2022.114614] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 01/15/2022] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
In this study, 3D BiOI nanoparticle (BOI NPs) modified MgCr2O4 nanoparticle (MCO NPs) was fabricated by simple sonochemical and coprecipitation method for the enhanced photocatalytic activity. The morphological structure of the MgCr2O4-BiOI nanocomposite (MCO-BOI NCs) was characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-visible diffuse reflectance spectroscopy (DRS), electron impedance spectroscopy (EIS) and photo luminescence (PL). The lower in the PL intensity and small arc in EIS for NCs shows the effective charge separation and lower in rate of recombination of charge carriers in NCs than the pure MCO and BOI NPs. The degradation efficiency of Rhodamine B (RhB) and malachite green (MG) by MCO-BOI NCs was found to be 99.5% and 98.2% receptivity. In addition, the photocatalytic degradation of RhB and MG was studied under various environmental parameters (different pH, varying the concentration of NCs and dyes) and response surface (RSM) plot was performed. The complete mineralization of RhB and MG by MCO-BOI NCs was determined by TOC. In addition, the photocatalytic degradation pathway was elucidated based on GC-MS results and Fukui function. In addition, the toxicity of intermediate formed during the degradation of RhB and MG was predicted by ECOSAR. The present work highlights the application of MCO-BOI NCs in environmental remediation for toxic pollutant removal.
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Affiliation(s)
- S Balasurya
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India
| | - Mohammad K Okla
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | | | - Abdullah A Al-Ghamdi
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Mostafa A Abdel-Maksoud
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Bander Almunqedhi
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Hamada AbdElgawad
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2020, Antwerpen, Belgium
| | - Ajith M Thomas
- Department of Botany and Biotechnology, St Xavier's College, Thumba, Thiruvananthapuram, India
| | - Lija L Raju
- Department of Zoology, Mar Ivanios College, Nalanchira, Thiruvananthapuram, India
| | - S Sudheer Khan
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India.
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Abousalman-Rezvani Z, Roghani-Mamaqani H, Riazi H, Abousalman-Rezvani O. Water treatment using stimuli-responsive polymers. Polym Chem 2022. [DOI: 10.1039/d2py00992g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Abstract
Stimuli-responsive polymers are a new category of smart materials used in water treatment via a stimuli-induced purification process and subsequent regeneration processes.
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Affiliation(s)
- Zahra Abousalman-Rezvani
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria, 3052, Australia
- CSIRO, Manufacturing–Biomedical Manufacturing, Ian Wark Laboratory, Research Way, Clayton, VIC 3168, Australia
| | - Hossein Roghani-Mamaqani
- Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, Iran
| | - Hossein Riazi
- Department of Chemical and Biological Engineering, Drexel University, Philadelphia, PA 19104, USA
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Chen Z, Song X, Soh WWM, Wen Y, Zhu J, Zhang M, Li J. In Situ Synthesis of Magnetic Poly(DMAEAB-co-NIPAm)@Fe 3O 4 Composite Hydrogel for Removal of Dye from Water. Gels 2021; 7:201. [PMID: 34842702 PMCID: PMC8628751 DOI: 10.3390/gels7040201] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/27/2021] [Accepted: 11/02/2021] [Indexed: 12/11/2022] Open
Abstract
Water pollution by toxic substances, such as dye molecules, remains a major environmental problem that needs to be solved. In the present work, the magnetic composite hydrogel based on the poly(2-(methacryloyloxy)-N-(2-hydroxyethyl)-N,N-dimethylethan-1-aminium bromide-co-N-isopropylacrylamide) copolymer with incorporated Fe3O4 particles ((poly(DMAEAB-co-NIPAm)@Fe3O4)) was prepared by an in situ synthesis technique for the efficient removal of dye molecules from water. The successfully synthesized magnetic hydrogel was characterized by FTIR, XRD, TGA, and TEM. The removal efficiency of the anionic dye bromophenol blue (BPB) and the cationic dye rhodamine B (RDM) by the prepared hydrogel adsorbents was evaluated. Various adsorption parameters, including the concentration of adsorbents and adsorption time, were also investigated. The results showed that the synthesized magnetic hydrogel had excellent BPB removal performance compared to the removal of RDM. The optimum adsorbent concentration for 0.5 mM BPB solution was approximately 0.5 g/L, and the removal efficiency was more than 99%. The kinetics data of BPB removal fitted well into the pseudo-2nd-order model, indicating that BPB dye adsorption involves chemical adsorption and physical adsorption. In addition, recycling studies were conducted to examine the reusability of the magnetic hydrogel for BPB removal for up to five cycles and the hydrogel could be reused without losing its high removal efficiency. The magnetic hydrogel poly(DMAEAB-co-NIPAm)@Fe3O4 with high removal efficiency, good selectivity, and reusability shows great potential for the removal of anionic dyes in wastewater treatment.
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Affiliation(s)
- Zhi Chen
- Department of Biomedical Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore; (Z.C.); (X.S.); (W.W.M.S.); (Y.W.); (J.Z.); (M.Z.)
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
| | - Xia Song
- Department of Biomedical Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore; (Z.C.); (X.S.); (W.W.M.S.); (Y.W.); (J.Z.); (M.Z.)
| | - Wilson Wee Mia Soh
- Department of Biomedical Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore; (Z.C.); (X.S.); (W.W.M.S.); (Y.W.); (J.Z.); (M.Z.)
| | - Yuting Wen
- Department of Biomedical Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore; (Z.C.); (X.S.); (W.W.M.S.); (Y.W.); (J.Z.); (M.Z.)
| | - Jingling Zhu
- Department of Biomedical Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore; (Z.C.); (X.S.); (W.W.M.S.); (Y.W.); (J.Z.); (M.Z.)
| | - Miao Zhang
- Department of Biomedical Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore; (Z.C.); (X.S.); (W.W.M.S.); (Y.W.); (J.Z.); (M.Z.)
| | - Jun Li
- Department of Biomedical Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore; (Z.C.); (X.S.); (W.W.M.S.); (Y.W.); (J.Z.); (M.Z.)
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10
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Yang J, Wang K, Lv Z, Li W, Luo K, Cao Z. Facile Preparation and Dye Adsorption Performance of Poly( N-isopropylacrylamide- co-acrylic acid)/Molybdenum Disulfide Composite Hydrogels. ACS OMEGA 2021; 6:28285-28296. [PMID: 34723025 PMCID: PMC8552478 DOI: 10.1021/acsomega.1c04433] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 10/05/2021] [Indexed: 05/06/2023]
Abstract
Using N-isopropylacrylamide (NIPAM) and acrylic acid (AAc) as monomers, N,N'-methylenebisacrylamide (MBA) as a cross-linking agent, and molybdenum disulfide (MoS2) as functional particles, a P(NIPAM-co-AAc)/MoS2 composite hydrogel was prepared by free radical polymerization initiated by ultraviolet light. The results of Fourier transform infrared spectroscopy, Raman spectroscopy, and scanning electron microscopy show that MoS2 has been successfully introduced into the P(NIPAM-co-AAc) system, and the obtained composite hydrogel has a porous network structure. Studies on the swelling property and dye adsorption performance show that the addition of MoS2 can increase the swelling ratio of P(NIPAM-co-AAc) hydrogels to a certain extent and can significantly improve the ability of the P(NIPAM-co-AAc) hydrogel to adsorb methylene blue (MB). The adsorption process of MB by the composite hydrogels conforms to the pseudo-second-order kinetics and the Langmuir isotherm adsorption models. The estimated equilibrium adsorption capacity (Q m) using the Langmuir isotherm model can reach 1258 mg/g, mainly due to the electrostatic interaction between the negatively charged groups -COO- and MoS2 particles on the network structure and the positively charged dye MB. The adsorption of MB by P(NIPAM-co-AAc)/MoS2 composite hydrogels depends on the temperature during adsorption. Compared with room temperature, a high temperature of 40 °C above the poly(N-isopropylacrylamide) (PNIPAM) phase transition temperature (∼32 °C) leads to a decreased adsorption capacity of the P(NIPAM-co-AAc)/MoS2 composite hydrogel for MB due to the enhanced hydrophobic properties of the network structure and the decrease of the swelling ratio. The prepared hydrogel material can be used as a good adsorbent for dyes, which is promising in wastewater treatment.
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Affiliation(s)
- Jianping Yang
- Department
of Orthopedics, Changzhou Hospital of Traditional
Chinese Medicine, 25 Heping North Road, Changzhou 213000, Jiangsu, P.
R. China
| | - Kailun Wang
- Jiangsu
Key Laboratory of Environmentally Friendly Polymeric Materials, School
of Materials Science and Engineering, Jiangsu Collaborative Innovation
Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, P. R. China
| | - Zhengxiang Lv
- Department
of Orthopedics, Changzhou Hospital of Traditional
Chinese Medicine, 25 Heping North Road, Changzhou 213000, Jiangsu, P.
R. China
| | - Wenjun Li
- Jiangsu
Key Laboratory of Environmentally Friendly Polymeric Materials, School
of Materials Science and Engineering, Jiangsu Collaborative Innovation
Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, P. R. China
| | - Keming Luo
- Jiangsu
Key Laboratory of Environmentally Friendly Polymeric Materials, School
of Materials Science and Engineering, Jiangsu Collaborative Innovation
Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, P. R. China
| | - Zheng Cao
- Jiangsu
Key Laboratory of Environmentally Friendly Polymeric Materials, School
of Materials Science and Engineering, Jiangsu Collaborative Innovation
Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, P. R. China
- Changzhou
University Huaide College, Jingjiang 214500, P. R. China
- National
Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou 213164, P. R.
China
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11
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Flemming P, Münch AS, Fery A, Uhlmann P. Constrained thermoresponsive polymers - new insights into fundamentals and applications. Beilstein J Org Chem 2021; 17:2123-2163. [PMID: 34476018 PMCID: PMC8381851 DOI: 10.3762/bjoc.17.138] [Citation(s) in RCA: 6] [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: 03/31/2021] [Accepted: 08/10/2021] [Indexed: 12/15/2022] Open
Abstract
In the last decades, numerous stimuli-responsive polymers have been developed and investigated regarding their switching properties. In particular, thermoresponsive polymers, which form a miscibility gap with the ambient solvent with a lower or upper critical demixing point depending on the temperature, have been intensively studied in solution. For the application of such polymers in novel sensors, drug delivery systems or as multifunctional coatings, they typically have to be transferred into specific arrangements, such as micelles, polymer films or grafted nanoparticles. However, it turns out that the thermodynamic concept for the phase transition of free polymer chains fails, when thermoresponsive polymers are assembled into such sterically confined architectures. Whereas many published studies focus on synthetic aspects as well as individual applications of thermoresponsive polymers, the underlying structure-property relationships governing the thermoresponse of sterically constrained assemblies, are still poorly understood. Furthermore, the clear majority of publications deals with polymers that exhibit a lower critical solution temperature (LCST) behavior, with PNIPAAM as their main representative. In contrast, for polymer arrangements with an upper critical solution temperature (UCST), there is only limited knowledge about preparation, application and precise physical understanding of the phase transition. This review article provides an overview about the current knowledge of thermoresponsive polymers with limited mobility focusing on UCST behavior and the possibilities for influencing their thermoresponsive switching characteristics. It comprises star polymers, micelles as well as polymer chains grafted to flat substrates and particulate inorganic surfaces. The elaboration of the physicochemical interplay between the architecture of the polymer assembly and the resulting thermoresponsive switching behavior will be in the foreground of this consideration.
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Affiliation(s)
- Patricia Flemming
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - Alexander S Münch
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
| | - Andreas Fery
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - Petra Uhlmann
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
- University of Nebraska-Lincoln, NE 68588, Lincoln, USA
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12
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Kumbhakar K, Dey A, Mondal A, De P, Biswas R. Interactions and Dynamics in Aqueous Solutions of pH-Responsive Polymers: A Combined Fluorescence and Dielectric Relaxation Study. J Phys Chem B 2021; 125:6023-6035. [PMID: 34057364 DOI: 10.1021/acs.jpcb.1c03435] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Interaction and dynamics of aqueous solutions of pH-responsive smart polymers are investigated via steady-state, time-resolved fluorescence emission spectroscopy with the help of external local reporter coumarin 153 (C153), while MHz to GHz dielectric relaxation spectroscopic (DRS) measurement reports the intrinsic medium relaxation features. A series of pH-responsive random copolymers (DPL-DP60) comprising of a pH-responsive moiety 2-((leucinyl)oxy)ethyl methacrylate (l-Leu-HEMA) and hydrophobic methyl methacrylate (MMA) are synthesized and characterized. A balance between the pH-responsive (l-Leu-HEMA) and the hydrophobic (MMA) content dictates the phase transition pH, which is found to be ∼5-7 for these aqueous copolymer solutions (1 mg/mL). Dynamic light scattering measurements in aqueous solutions of these polymers reflect a small particle size (∼2-8 nm) at solution pH below their individual phase transition pH, while a large particle size (∼140-340 nm) forms beyond their phase transition pH. No signature of a phase transition pH-driven abrupt change in static and dynamic properties of aqueous polymer solutions has been registered from pH-dependent dielectric relaxation as well as solute (C153)-centric fluorescence measurements. A significant impact of varying the l-Leu-HEMA/MMA segment ratio on steady-state fluorescence emission and rotational anisotropy decay of the fluorophore solute (C153) has been observed. MHz to GHz DRS in aqueous solutions of these pH-responsive polymers reflects bulk water-like dielectric features.
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Affiliation(s)
- Kajal Kumbhakar
- Chemical, Biological and Macromolecular Sciences (CBMS), S. N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake, Kolkata 700106, India
| | - Asmita Dey
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246 Nadia, West Bengal, India
| | - Amrita Mondal
- Chemical, Biological and Macromolecular Sciences (CBMS), S. N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake, Kolkata 700106, India
| | - Priyadarsi De
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246 Nadia, West Bengal, India
| | - Ranjit Biswas
- Chemical, Biological and Macromolecular Sciences (CBMS), S. N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake, Kolkata 700106, India
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13
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Synthesis of carbazole-based polymer derived N-enriched porous carbon for dyes sorption. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-020-03279-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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14
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Degradable CO2-responsive microgels with wrinkled porous structure for enhanced, selective and recyclable removal of anionic dyes, Cr(VI) and As(V). Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110374] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Gresham IJ, Humphreys BA, Willott JD, Johnson EC, Murdoch TJ, Webber GB, Wanless EJ, Nelson ARJ, Prescott SW. Geometrical Confinement Modulates the Thermoresponse of a Poly( N-isopropylacrylamide) Brush. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02775] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Isaac J. Gresham
- School of Chemical Engineering, UNSW Sydney, Sydney, New South Wales 2052, Australia
| | - Ben A. Humphreys
- Priority Research Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan 2308, Australia
| | - Joshua D. Willott
- Membrane Science and Technology, Mesa+ Institute for Nanotechnology, University of Twente, Enschede 7500 AE, The Netherlands
| | - Edwin C. Johnson
- Priority Research Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan 2308, Australia
| | - Timothy J. Murdoch
- Priority Research Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan 2308, Australia
| | - Grant B. Webber
- Priority Research Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan 2308, Australia
| | - Erica J. Wanless
- Priority Research Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan 2308, Australia
| | | | - Stuart W. Prescott
- School of Chemical Engineering, UNSW Sydney, Sydney, New South Wales 2052, Australia
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16
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Panja S, Bag BG. Flower- and Grass-like Self-Assemblies of an Oleanane-Type Triterpenoid Erythrodiol: Application in the Removal of Toxic Dye from Water. ACS OMEGA 2020; 5:30488-30494. [PMID: 33283097 PMCID: PMC7711690 DOI: 10.1021/acsomega.0c04291] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 10/28/2020] [Indexed: 05/10/2023]
Abstract
Erythrodiol (3β-olean-12-ene-3, 28-diol) (C30H50O2) 1 is a nanosized oleanane-type fused 6-6-6-6-6 pentacyclic triterpeneoid extractable from the dried leaves of olive (Olea europia). One step reduction of oleanolic acid extracted from Lantana camara also yields the same compound. The triterpenoid has one secondary -OH group attached at C3 of the "A" ring and one primary -OH group at C28 present at the junction of the "D" and "E" rings. Here, we report the spontaneous self-assembly of erythrodiol in different neat organic liquids and aqueous-organic liquid mixtures. The nanosized dihydroxy triterpenoid having an oleanane-type lipophilic rigid skeleton self-assembled in liquids, yielding nanosized fibrils, microsized flowers, and grass-like architectures via formation of densely assembled fibrils and petals or 2D sheets. The microstructures of the self-assemblies have been characterized by different techniques like optical microscopy, electron microscopy, atomic force microscopy, FTIR, and wide angle X-ray diffraction studies. The porous self-assemblies having a large surface area obtained from 1 were capable of adsorbing toxic fluorophores like rhodamine-B, rhodamine-6G, methylene blue, and crystal violet (CV). Moreover, removal of the aforementioned toxic pigments has also been demonstrated from their aqueous solutions by using UV-visible spectrophotometry and epifluorescence microscopy.
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Affiliation(s)
- Saikat
Kumar Panja
- Department of Chemistry and
Chemical Technology, Vidyasagar University, Midnapore, West Bengal 721102, India
| | - Braja Gopal Bag
- Department of Chemistry and
Chemical Technology, Vidyasagar University, Midnapore, West Bengal 721102, India
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17
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18
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Anakhov MV, Gumerov RA, Richtering W, Pich A, Potemkin II. Scavenging One of the Liquids versus Emulsion Stabilization by Microgels in a Mixture of Two Immiscible Liquids. ACS Macro Lett 2020; 9:736-742. [PMID: 35648562 DOI: 10.1021/acsmacrolett.0c00191] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
It is known that microgels can serve as soft, permeable and stimuli-responsive alternative of solid colloidal particles to stabilize oil-water emulsions. The driving force for the adsorption of the microgels on interface of two immiscible liquids is a shielding of unfavorable oil-water contacts by adsorbed subchains, that is, the decrease of the surface tension between the liquids. Such phenomenon usually proceeds if volume fractions of the two liquids are comparable with each other and the microgel concentration is not high enough. The natural question arises: what is going on with the system in the opposite case of strongly asymmetric mixture (one of the liquids (oil) has a very small fraction) or high microgel concentration (the overall volume of the microgels exceeds the volume of the minor oil component)? Here we demonstrate that the microgels uptake the oil whose concentration within the microgels can be orders of magnitude higher than outside, leading to the additional microgel swelling (in comparison with the swelling in water). Thus, the microgels can serve as scavengers and concentrators of liquids dissolved in water. At first glance, this effect seems counterintuitive. However, it has a clear physical reason related to the incompatibility of oil and water. Absorption of the oil by microgels reduces unfavorable oil-water contacts by microgel segments: the microgels have a higher concentration of the segments at the periphery, forming a shell. The microgels with uptaken oil are stable toward aggregation at very small oil concentration in the mixture. However, an increase in the oil concentration can lead to aggregation of the microgels into dimers, trimers, and so on. The increasing concentration of oil mediates the attraction between the microgels: the oil in the aggregates appears to be localized in-between the microgels instead of their interior, which is accompanied by the release of the elastic stress of the microgels. A further increase in the oil concentration results in a growth of the size of the oil droplets between the microgels and the number of the microgels at the droplet's periphery, that is, the emulsion is formed.
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Affiliation(s)
- Mikhail V. Anakhov
- Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation
| | - Rustam A. Gumerov
- Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation
- DWI - Leibniz Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen 52056, Germany
| | - Walter Richtering
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, Aachen 52056, Germany
| | - Andrij Pich
- DWI - Leibniz Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen 52056, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
- Aachen Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Urmonderbaan 22, 6167 RD Geleen, The Netherlands
| | - Igor I. Potemkin
- Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation
- DWI - Leibniz Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen 52056, Germany
- National Research South Ural State University, Chelyabinsk 454080, Russian Federation
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19
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Lu Y, Fang W, Kong J, Zhang F, Wang Z, Teng X, Zhu Y, Jin J. A microporous polymer ultrathin membrane for the highly efficient removal of dyes from acidic saline solutions. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118027] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Zhang C, Li H, Li C, Li Z. Fe-Loaded MOF-545(Fe): Peroxidase-Like Activity for Dye Degradation Dyes and High Adsorption for the Removal of Dyes from Wastewater. Molecules 2019; 25:molecules25010168. [PMID: 31906165 PMCID: PMC6983047 DOI: 10.3390/molecules25010168] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/21/2019] [Accepted: 12/30/2019] [Indexed: 12/16/2022] Open
Abstract
Methods to remove dye pollutants with natural enzyme, like horseradish peroxidase (HRP), are still limited due to high costs and low stability levels. The development of such a method with similar enzymatic activity is important and could be helpful in wastewater disposal. A metal organic framework material, Fe-loaded MOF-545 (Fe), was synthesized in our study as a new way to remove dyes due to its peroxidase-like activity. The structural characterizations of Fe-loaded MOF-545(Fe) was investigated using scanning electron microscopy (SEM), UV-Vis absorption spectra, and X-ray diffraction (XRD). The peroxidase-like (POD-like) activity of Fe-loaded MOF-545(Fe) was investigated under different pH and temperature conditions. Because of the Fe added into the MOF-545 structure, the absorption of Fe-loaded MOF-545(Fe) for acid (anionic) dyes (methyl orange (MO)) was better than for basic (cationic) dyes (methylene blue (MB)). The Fe-loaded MOF-545(Fe) could give a significant color fading for MO and MB over a short time (about two hours) with peroxidase-like activity. The remarkable capacity of Fe-loaded MOF-545(Fe) to remove the MO or MB is due to not only physical adsorption, but also degradation of the MO and MB with POD-like activity. Therefore, Fe-loaded MOF-545(Fe) has significant potential regarding dye removal from wastewater.
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Affiliation(s)
- Chuang Zhang
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun 130012, China; (C.Z.); (H.L.)
| | - Haichao Li
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun 130012, China; (C.Z.); (H.L.)
| | - Chen Li
- Key Laboratory for Zoonosis Research, Ministry of Education, Institute of Zoonosis, Jilin University, Changchun 130012, China
- Correspondence: (C.L.); (Z.L); Tel.: +86-431-85167419 (C.L.); +86-431-85155201 (Z.L.)
| | - Zhengqiang Li
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun 130012, China; (C.Z.); (H.L.)
- Correspondence: (C.L.); (Z.L); Tel.: +86-431-85167419 (C.L.); +86-431-85155201 (Z.L.)
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21
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Fragal VH, Catori DM, Fragal EH, Garcia FP, Nakamura CV, Rubira AF, Silva R. Two-dimensional thermoresponsive sub-microporous substrate for accelerated cell tissue growth and facile detachment. J Colloid Interface Sci 2019; 547:78-86. [DOI: 10.1016/j.jcis.2019.03.071] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/21/2019] [Accepted: 03/22/2019] [Indexed: 11/27/2022]
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22
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Korde JM, Kandasubramanian B. Fundamentals and Effects of Biomimicking Stimuli-Responsive Polymers for Engineering Functions. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00683] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Jay M. Korde
- Biocomposite Laboratory, Department of Metallurgical & Materials Engineering, DIAT (DU), Ministry of Defence, Girinagar, Pune-411025, India
| | - Balasubramanian Kandasubramanian
- Biocomposite Laboratory, Department of Metallurgical & Materials Engineering, DIAT (DU), Ministry of Defence, Girinagar, Pune-411025, India
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23
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Layered double hydroxide/polyacrylamide nanocomposite hydrogels: Green preparation, rheology and application in methyl orange removal from aqueous solution. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.033] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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24
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Naseem K, Begum R, Wu W, Usman M, Irfan A, Al-Sehemi AG, Farooqi ZH. Adsorptive removal of heavy metal ions using polystyrene-poly(N-isopropylmethacrylamide-acrylic acid) core/shell gel particles: Adsorption isotherms and kinetic study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.054] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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25
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Polyethyleneimine (PEI) incorporated Cu-BTC composites: Extended applications in ultra-high efficient removal of congo red. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2018.11.021] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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26
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Humphreys BA, Prescott SW, Murdoch TJ, Nelson A, Gilbert EP, Webber GB, Wanless EJ. Influence of molecular weight on PNIPAM brush modified colloidal silica particles. SOFT MATTER 2018; 15:55-64. [PMID: 30534695 DOI: 10.1039/c8sm01824c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The effect of molecular weight and temperature on the phase transition and internal structure of poly(N-isopropylacrylamide) brush modified colloidal silica particles was investigated using dynamic light scattering (DLS) and small angle neutron scattering (SANS) between 15 and 45 °C. Dry particle analysis utilising transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) all confirmed the thickness of the polymer brush shell increased as a function of polymerisation time. Hydrodynamic diameter and electrophoretic mobility results revealed that the brush modified particles transitioned from swollen shells to a collapsed conformation between 15 and 35 °C. The dispersions were electrosterically stabilised over the entire temperature range investigated, with minimal thermal hysteresis recorded. Modelling of the hydrodynamic diameter enabled the calculation of a lower critical solution temperature (LCST) which increased as a function of brush thickness. The internal structure determined via SANS showed a swollen brush at low temperatures (18 and 25 °C) which decayed radially away from the substrate, while a collapsed block-like conformation with 60% polymer volume fraction was present at 40 °C. Radial phase separation was evident at intermediate temperatures (30 and 32.5 °C) with the lower molecular weight sample having a greater volume fraction of polymer in the dense inner region at these temperatures.
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Affiliation(s)
- Ben A Humphreys
- Priority Research Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan, NSW 2308, Australia.
| | | | - Timothy J Murdoch
- Priority Research Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Andrew Nelson
- Australian Centre for Neutron Scattering, ANSTO, Lucas Heights, NSW 2234, Australia
| | - Elliot P Gilbert
- Australian Centre for Neutron Scattering, ANSTO, Lucas Heights, NSW 2234, Australia
| | - Grant B Webber
- Priority Research Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Erica J Wanless
- Priority Research Centre for Advanced Particle Processing and Transport, University of Newcastle, Callaghan, NSW 2308, Australia.
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27
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Guo Z, Chen Q, Gu H, He Z, Xu W, Zhang J, Liu Y, Xiong L, Zheng L, Feng Y. Giant Microgels with CO 2-Induced On-Off, Selective, and Recyclable Adsorption for Anionic Dyes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:38073-38083. [PMID: 30360074 DOI: 10.1021/acsami.8b13448] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Adsorbents that are capable of controllable pollutants adsorption and release without secondary pollution are attractive in water treatment. Here, we propose eco-friendly CO2 as a trigger to switch the charge states and collapse-expansion transition of giant microgels consisting of hydrophilic acrylamide and hydrophobic 2-(diethylamino)ethyl methacrylate and demonstrated the on-off, selective, and recyclable adsorption of anionic dyes on microgels under CO2 stimulation. Apart from easy-handling separation from the water by a simple filtration process, the maximum adsorption capacity is as high as 821 mg g-1, and the adsorption isotherms and kinetics obeyed Langmuir isotherm and the pseudo-second-order kinetics models, respectively. The anionic dye can also be separated from the mixture solution using CO2-treated microgels. Moreover, a wastewater treatment prototype with microgel-packed column was fabricated. Under continuous flow condition, the dye was removed and recovered by alternative bubbling CO2 and flushing with aqueous alkali (pH 12). Thus, this type of microgels with CO2-induced protonation-deprotonation transition can serve as a cost-effective, environmentally friendly, and efficient adsorbent for water purification applications.
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Affiliation(s)
- Zanru Guo
- Department of Polymer Materials and Chemical Engineering, School of Materials Science and Engineering , East China Jiaotong University , Nanchang , Jiangxi 330013 , P. R. China
| | - Qiang Chen
- Department of Polymer Materials and Chemical Engineering, School of Materials Science and Engineering , East China Jiaotong University , Nanchang , Jiangxi 330013 , P. R. China
| | - Hongjian Gu
- Department of Polymer Materials and Chemical Engineering, School of Materials Science and Engineering , East China Jiaotong University , Nanchang , Jiangxi 330013 , P. R. China
| | - Zhanfeng He
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation , Southwest Petroleum University , Chengdu 610500 , P. R. China
| | - Wenyuan Xu
- Department of Polymer Materials and Chemical Engineering, School of Materials Science and Engineering , East China Jiaotong University , Nanchang , Jiangxi 330013 , P. R. China
| | - Jiali Zhang
- Department of Polymer Materials and Chemical Engineering, School of Materials Science and Engineering , East China Jiaotong University , Nanchang , Jiangxi 330013 , P. R. China
| | - Yongxin Liu
- Department of Polymer Materials and Chemical Engineering, School of Materials Science and Engineering , East China Jiaotong University , Nanchang , Jiangxi 330013 , P. R. China
| | - Leyan Xiong
- Department of Polymer Materials and Chemical Engineering, School of Materials Science and Engineering , East China Jiaotong University , Nanchang , Jiangxi 330013 , P. R. China
| | - Longzhen Zheng
- Department of Polymer Materials and Chemical Engineering, School of Materials Science and Engineering , East China Jiaotong University , Nanchang , Jiangxi 330013 , P. R. China
| | - Yujun Feng
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , P. R. China
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28
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Naseem K, Farooqi ZH, Begum R, Ghufran M, Rehman MZU, Najeeb J, Irfan A, Al-Sehemi AG. Poly(N-isopropylmethacrylamide-acrylic acid) microgels as adsorbent for removal of toxic dyes from aqueous medium. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.07.039] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Palencia M, Córdoba A, Arrieta Á. Stimuli-sensitive nanostructured poly(sodium 4-styrene sulfonate): Synthesis, characterization, and study of metal ion retention properties. J Appl Polym Sci 2018. [DOI: 10.1002/app.46001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Manuel Palencia
- Research Group in Science with Technological Applications (GI-CAT), Department of Chemistry, Faculty of Natural and Exact Sciences; Universidad del Valle, Street 13 # 100-00; Cali 25360 Colombia
| | - Alexander Córdoba
- Research Group in Science with Technological Applications (GI-CAT), Department of Chemistry, Faculty of Natural and Exact Sciences; Universidad del Valle, Street 13 # 100-00; Cali 25360 Colombia
- Mindtech Research Group (Mindtech-RG), MINDTECH S.A.S, Street 101 # 42-75; Cali 25360 Colombia
| | - Álvaro Arrieta
- Department of Biology and Chemistry; Universidad de Sucre, Street 28 # 5-267; Sincelejo 700001 Colombia
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30
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Marques NDN, Balaban RDC, Halila S, Borsali R. Synthesis and characterization of carboxymethylcellulose grafted with thermoresponsive side chains of high LCST: The high temperature and high salinity self-assembly dependence. Carbohydr Polym 2018; 184:108-117. [DOI: 10.1016/j.carbpol.2017.12.053] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 12/06/2017] [Accepted: 12/19/2017] [Indexed: 12/30/2022]
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31
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Naseem K, Hussain Farooqi Z, Zia Ur Rehman M, Atiq Ur Rehman M, Ghufran M. Microgels as efficient adsorbents for the removal of pollutants from aqueous medium. REV CHEM ENG 2018. [DOI: 10.1515/revce-2017-0042] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Abstract
Due to their responsive behavior, high stability, and reusability, microgels have gained importance as adsorbents for the removal of aqueous pollutants such as heavy metals, nitroarenes, organic matter, and toxic dyes. However, there are few challenges that need to be addressed to make microgels as potential adsorbents for the removal of aqueous pollutants. This review article encircles the recent developments in the field of microgel usage as adsorbents for the extraction of aqueous pollutants. Many factors that influence the adsorption of pollutants such as pH, temperature of the medium, agitation time, pollutant concentration, microgel dose, and feed contents of microgels have been discussed in detail. Different adsorption isotherms as well as the kinetic and thermodynamic aspects of the adsorption process have also been enlightened to interpret the insight of the adsorption process. Microgel recovery from the reaction mixture as well as reusability is discussed from the financial point of view. The biodegradability of microgels induced due to the incorporation of specific biomacromolecules is also discussed.
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Affiliation(s)
- Khalida Naseem
- Institute of Chemistry , University of the Punjab, New Campus , Lahore 54590 , Pakistan
- Department of Chemistry , Kinnaird College for Women , Lahore 54000 , Pakistan
| | | | - Muhammad Zia Ur Rehman
- Department of Chemical Engineering , University of Engineering and Technology , Lahore 54890 , Pakistan
| | | | - Maida Ghufran
- Department of Chemistry , Kinnaird College for Women , Lahore 54000 , Pakistan
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32
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Liu J, Shu T, Su L, Zhang X, Serpe MJ. Synthesis of poly (N-isopropylacrylamide)-co-(acrylic acid) microgel-entrapped CdS quantum dots and their photocatalytic degradation of an organic dye. RSC Adv 2018; 8:16850-16857. [PMID: 35540540 PMCID: PMC9080336 DOI: 10.1039/c8ra01855c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 04/29/2018] [Indexed: 11/21/2022] Open
Abstract
CdS quantum dots (CdSQDs) were generated inside the network structure of poly (N-isopropylacrylamide)-co-(acrylic acid) (pNIPAm-co-AAc) microgels and their ability to photocatalytically degrade organic dyes was evaluated using rhodamine B (RhB).
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Affiliation(s)
- Jingzhu Liu
- Department of Chemistry
- University of Alberta
- Edmonton
- Canada
| | - Tong Shu
- Beijing Key Laboratory for Bioengineering and Sensing Technology
- Research Center for Bioengineering and Sensing Technology
- School of Chemistry and Biological Engineering
- University of Science and Technology Beijing
- Beijing 100083
| | - Lei Su
- Beijing Key Laboratory for Bioengineering and Sensing Technology
- Research Center for Bioengineering and Sensing Technology
- School of Chemistry and Biological Engineering
- University of Science and Technology Beijing
- Beijing 100083
| | - Xueji Zhang
- Beijing Key Laboratory for Bioengineering and Sensing Technology
- Research Center for Bioengineering and Sensing Technology
- School of Chemistry and Biological Engineering
- University of Science and Technology Beijing
- Beijing 100083
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33
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Hernandez-Martínez A, Lujan-Montelongo J, Silva-Cuevas C, Mota-Morales JD, Cortez-Valadez M, Ruíz-Baltazar ÁDJ, Cruz M, Herrera-Ordonez J. Swelling and methylene blue adsorption of poly(N,N-dimethylacrylamide-co-2-hydroxyethyl methacrylate) hydrogel. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2017.11.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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34
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Lu B, Tarn MD, Pamme N, Georgiou TK. Fabrication of tailorable pH responsive cationic amphiphilic microgels on a microfluidic device for drug release. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28860] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bingyuan Lu
- School of Mathematics and Physical Sciences; University of Hull; HU6 7RX United Kingdom
| | - Mark D. Tarn
- School of Mathematics and Physical Sciences; University of Hull; HU6 7RX United Kingdom
| | - Nicole Pamme
- School of Mathematics and Physical Sciences; University of Hull; HU6 7RX United Kingdom
| | - Theoni K. Georgiou
- Department of Materials; Imperial College London, Royal School of Mines, Exhibition Road; London SW7 2AZ United Kingdom
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35
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Gao Y, Wei M, Li X, Xu W, Ahiabu A, Perdiz J, Liu Z, Serpe MJ. Stimuli-responsive polymers: Fundamental considerations and applications. Macromol Res 2017. [DOI: 10.1007/s13233-017-5088-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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36
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Synthesis and Catalytic Activity of Alkylamine-Capped Ultra-small Palladium Nanoparticles for Organic Pollutant Degradation. J CLUST SCI 2017. [DOI: 10.1007/s10876-017-1262-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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37
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Seyedi N, Sheibani H, Saidi K. WITHDRAWN: Biosynthesis and application of magnetically recyclable nanocatalyst of Fe3O4@SiO2–Ag by leaf extract of Origanum vulgare plant in the reduction of organic dyes in water. Catal Today 2017. [DOI: 10.1016/j.cattod.2017.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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38
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Chen D, Liu Y, Qin Y, Wang L, Ma Y, Yang W. Dual-Functionalized Hollow Polymer Particle as a pH-Responsive Adsorbent for Selective Removal of Basic Dye. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201600681] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dong Chen
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - Yang Liu
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - Yan Qin
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - Li Wang
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - Yuhong Ma
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education; Beijing University of Chemical Technology; Beijing 100029 China
| | - Wantai Yang
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education; Beijing University of Chemical Technology; Beijing 100029 China
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39
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Zhang HJ, Wang JH, Zhang YH, Hu TL. Hollow porous organic polymer: High-performance adsorption for organic dye in aqueous solution. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28500] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Huan-Jun Zhang
- Tianjin Key Lab on Metal and Molecule-Based Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), School of Materials Science and Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Nankai University; Tianjin 300350 China
| | - Jian-Hong Wang
- Tianjin Key Lab on Metal and Molecule-Based Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), School of Materials Science and Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Nankai University; Tianjin 300350 China
| | - Ying-Hui Zhang
- Tianjin Key Lab on Metal and Molecule-Based Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), School of Materials Science and Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Nankai University; Tianjin 300350 China
| | - Tong-Liang Hu
- Tianjin Key Lab on Metal and Molecule-Based Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), School of Materials Science and Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Nankai University; Tianjin 300350 China
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40
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Abstract
Responsive polymer-based materials are capable of altering their chemical and/or physical properties upon exposure to external stimuli. This review highlights their use for sensing and biosensing, drug delivery, and artificial muscles/actuators.
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Affiliation(s)
- Menglian Wei
- Department of Chemistry
- University of Alberta
- Edmonton
- Canada
| | - Yongfeng Gao
- Department of Chemistry
- University of Alberta
- Edmonton
- Canada
| | - Xue Li
- Department of Chemistry
- University of Alberta
- Edmonton
- Canada
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41
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Li H, Cao X, Zhang C, Yu Q, Zhao Z, Niu X, Sun X, Liu Y, Ma L, Li Z. Enhanced adsorptive removal of anionic and cationic dyes from single or mixed dye solutions using MOF PCN-222. RSC Adv 2017. [DOI: 10.1039/c7ra01647f] [Citation(s) in RCA: 139] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
MOF PCN-222 exhibits excellent adsorption/removal capacities for numerous anionic and cationic dyes individually and together in solutions.
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42
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Sansuk S, Srijaranai S, Srijaranai S. A New Approach for Removing Anionic Organic Dyes from Wastewater Based on Electrostatically Driven Assembly. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:6477-6484. [PMID: 27231753 DOI: 10.1021/acs.est.6b00919] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A conceptually new approach for an efficient removal of anionic organic dyes from wastewater using layered double hydroxides (LDHs) through their formation is presented. Acid yellow 25 (AY25) was used as anionic organic dye model molecules. As a result of the electrostatic induction, the removal mechanism involved a concurrent incorporation of AY25 molecules into the interlayer of LDHs during their structural arrangement, where Mg(2+) and Al(3+) ions were utilized to construct the base of LDHs in an alkaline solution. It was found that the molar stoichiometry of all precursors was a key factor affecting the removal efficiency. Within 5 min removal time, this method still maintained high removal efficiency of over 97% and provided a removal capacity of ∼186 mg g(-1), comparable to that of other LDH-based methods. Also, almost complete dye recovery was simply achieved by anionic exchange with common anions (Cl(-), NO3(-), and CO3(2-)). Additionally, the present technique is straightforward, cost-effective, and environmentally friendly since it avoids the synthesis step of sorbents, thus significantly saving time, chemicals, and energy. Hence, this strategy not only exhibits the alternative exploitation of LDHs, but also provides new insights into the removal of contaminants from wastewater.
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Affiliation(s)
- Sira Sansuk
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University , Khon Kaen 40002, Thailand
| | - Somkiat Srijaranai
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University , Khon Kaen 40002, Thailand
| | - Supalax Srijaranai
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University , Khon Kaen 40002, Thailand
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43
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Begum R, Farooqi ZH, Khan SR. Poly(N-isopropylacrylamide-acrylic acid) copolymer microgels for various applications: A review. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2016.1180607] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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44
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Kureha T, Shibamoto T, Matsui S, Sato T, Suzuki D. Investigation of Changes in the Microscopic Structure of Anionic Poly(N-isopropylacrylamide-co-Acrylic acid) Microgels in the Presence of Cationic Organic Dyes toward Precisely Controlled Uptake/Release of Low-Molecular-Weight Chemical Compound. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4575-85. [PMID: 27101468 DOI: 10.1021/acs.langmuir.6b00760] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Changes in a microscopic structure of an anionic poly(N-isopropylacrylamide-co-acrylic acid) microgel were investigated using small- and wide-angle X-ray scattering (SWAXS). The scattering profiles of the microgels were analyzed in a wide scattering vector (q) range of 0.07 ≤ q/nm(-1) ≤ 20. In particular, the microscopic structure of the microgel in the presence of a cationic dye rhodamine 6G (R6G) was characterized in terms of its correlation length (ξ), which represents the length scale of the spatial correlation of the network density fluctuations, and characteristic distance (d*), which originated from the local packing of isopropyl groups of two neighboring chains. In the presence of cationic R6G, ξ exhibited a divergent-like behavior, which was not seen in the absence of R6G, and d* was decreased with decreasing the volume of the microgel upon increasing temperature. At the same time, the amount of R6G adsorbed per unit mass of the microgel increased upon heating. These results suggested that a coil-to-globule transition of the poly(N-isopropylacrylamide) chains in the present anionic microgel occurred because of efficiently screened, thus, short ranged electrostatic repulsion between the charged groups, and hydrophobic interaction between the isopropyl groups in the presence of cationic R6G. The combination of hydrophobic and electrostatic interaction between the cationic dye and the microgel affected the separation and volume transition behavior of the microgel.
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Affiliation(s)
- Takuma Kureha
- Graduate School of Textile Science & Technology, Shinshu University , 3-15-1 Tokida Ueda, Nagano 386-8567 Japan
| | - Takahisa Shibamoto
- Graduate School of Textile Science & Technology, Shinshu University , 3-15-1 Tokida Ueda, Nagano 386-8567 Japan
| | - Shusuke Matsui
- Graduate School of Textile Science & Technology, Shinshu University , 3-15-1 Tokida Ueda, Nagano 386-8567 Japan
| | - Takaaki Sato
- Graduate School of Textile Science & Technology, Shinshu University , 3-15-1 Tokida Ueda, Nagano 386-8567 Japan
| | - Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University , 3-15-1 Tokida Ueda, Nagano 386-8567 Japan
- Division of Smart Textiles, Institute for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University , 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan
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45
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Lu B, Tarn MD, Pamme N, Georgiou TK. Microfluidically fabricated pH-responsive anionic amphiphilic microgels for drug release. J Mater Chem B 2016; 4:3086-3093. [DOI: 10.1039/c5tb02378e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel amphiphilic microgels with hydrophobic and hydrophilic monomer units on the polymer chains were fabricated with an on-chip polymerisation methodology using a novel chip design.
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Affiliation(s)
- B. Lu
- Department of Chemistry
- University of Hull
- Hull
- UK
| | - M. D. Tarn
- Department of Chemistry
- University of Hull
- Hull
- UK
| | - N. Pamme
- Department of Chemistry
- University of Hull
- Hull
- UK
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46
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Abstract
A rapid way to dedye industrial effluents is reported herein using silver nanoshells (Ag-NSs) as a green catalyst.
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47
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Gao J, Zhang L, Liu X, Zhang W. Hierarchically structured, well-dispersed Ti4+ cross-linked chitosan as an efficient and recyclable sponge-like adsorbent for anionic azo-dye removal. RSC Adv 2016. [DOI: 10.1039/c6ra24446g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
One novel of sponge-like Ti4+ cross-linked chitosan (SL-TiCs) was prepared. The SL-TiCs had multiply nano-layer twisted sheets and high content of Ti4+, which can provide plenty channels for mass transfer and active sites for dyes adsorption.
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Affiliation(s)
- Jie Gao
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- PR China
| | - Lingfan Zhang
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- PR China
- Research Center of Analysis and Test
| | - Xin Liu
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- PR China
| | - Wenqing Zhang
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- PR China
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48
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Ghosh S, Acharyya M. Design of novolac resin-based network polymers for adsorptive removal of azo dye molecules. RSC Adv 2016. [DOI: 10.1039/c6ra01903j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novolac resin based two polymer networks were synthesized for the effective removal of azo dye molecules from aqueous solution.
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Affiliation(s)
- Samaresh Ghosh
- Department of Chemistry
- Bankura Sammilani College
- Bankura
- India
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49
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50
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Preparation and chiral recognition of thermosensitive poly(N-isopropylacrylamide) microgels containing modified L-phenylalanine groups. Chem Res Chin Univ 2015. [DOI: 10.1007/s40242-015-4461-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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