1
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Huang L, Qin S, Wen C, Xu Y, Lin Z, Wang Y. An off-on fluorescence method for acid phosphatase assay based on the inner filter effect of MnO 2 nanosheets on vitamin B 2. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 315:124263. [PMID: 38593539 DOI: 10.1016/j.saa.2024.124263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/21/2024] [Accepted: 04/06/2024] [Indexed: 04/11/2024]
Abstract
Fluorescence analysis has attracted much attention due to its rapidity and sensitivity. The present work describes a novel fluorescence detection method for acid phosphatase (ACP) on the basis of inner-filter effect (IFE), where MnO2 nanosheets (MnO2 NSs) and vitamin B2 (VB2) are served as absorbers and fluorophores, respectively. In the absence of ACP, the absorption band of MnO2 NSs overlaps well with the excitation band of VB2, resulting in effective IFE and inhibition of VB2 fluorescence. In the presence of ACP, 2-phospho-L-ascorbic acid trisodium salt (AAP) is hydrolyzed to generate ascorbic acid (AA), which efficiently trigger the reduction of MnO2 NSs into Mn2+ ions, causing the weakening of the MnO2 NSs absorption band and the recovery of VB2 fluorescence. Further investigation indicates that the fluorescence recovery degree of VB2 increases with the increase of ACP concentration. Under selected experimental conditions, the proposed method can achieve sensitive detection of ACP in the ranges of 0.5-4.0 mU/mL and 4.0-15 mU/mL along with a limit of detection (LOD) as low as 0.14 mU/mL. Finally, this method was successfully applied for the detection of ACP in human serum samples with satisfactory recoveries in the range of 95.0 %-108 %.
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Affiliation(s)
- Li Huang
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530003, China
| | - Shangying Qin
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530003, China
| | - Chuang Wen
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530003, China
| | - Yuanjin Xu
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530003, China.
| | - Zhongwei Lin
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530003, China
| | - Yilin Wang
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530003, China.
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2
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Abbas N, Husnain SM, Asim U, Shahzad F, Abbas Y. A novel green synthesis of MnO 2-Coal composite for rapid removal of silver and lead from wastewater. WATER RESEARCH 2024; 256:121526. [PMID: 38583333 DOI: 10.1016/j.watres.2024.121526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 03/19/2024] [Accepted: 03/25/2024] [Indexed: 04/09/2024]
Abstract
The presence of Ag(I) and Pb(II) ions in wastewater poses a significant threat to human health in contemporary times. This study aims to explore the development of a novel and economical adsorbent by grafting MnO2 particles onto low-rank coal, providing an innovative solution for the remediation of water contaminated with silver and lead. The synthesized nanocomposites, referred to as MnO2-Coal, underwent thorough characterization using FTIR, XRD, BET, and SEM to highlight the feasibility of in-situ surface modification of coal with MnO2 nanoparticles. The adsorption of Ag(I) and Pb(II) from their respective aqueous solution onto MnO2-Coal was systematically investigated, with optimization of key parameters such as pH, temperature, initial concentration, contact time, ionic strength, and competing ions. Remarkably adsorption equilibrium was achieved within a 10 min, resulting in impressive removal rates of 80-90 % for both Ag(I) and Pb(II) at pH 6. The experimental data were evaluated using Langmuir, Freundlich, and Temkin isotherm models. The Langmuir isotherm model proved to be more accurate in representing the adsorption of Ag(I) and Pb(II) ions onto MnO2-Coal, exhibiting high regression coefficients (R2 = 0.99) and maximum adsorption capacities of 93.57 and 61.98 mg/g, along with partition coefficients of 4.53 and 71.92 L/g for Ag(I) and Pb(II), respectively, at 293 K. Kinetic assessments employing PFO, PSO, Elovich, and IPD models indicated that the PFO and PSO models were most suitable for adsorption mechanism of Pb(II) and Ag(I) on MnO2-Coal composites, respectively. Moreover, thermodynamic evaluation revealed the spontaneous and endothermic adsorption process for Ag(I), while exothermic behavior for adsorption of Pb(II). Importantly, this approach not only demonstrates cost-effectiveness but also environmental friendliness in treating heavy metal-contamination in water. The research suggests the potential of MnO2-Coal composites as efficient and sustainable adsorbents for water purification applications.
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Affiliation(s)
- Naseem Abbas
- Institute of Chemical Sciences Bahauddin Zakariya University, Multan 60800, Punjab Pakistan
| | - Syed M Husnain
- Chemistry Division, Directorate of Science, Pakistan Institute of Nuclear Science and Technology (PINSTECH), Islamabad, 45650 Pakistan.
| | - Umar Asim
- Institute of Chemical Sciences Bahauddin Zakariya University, Multan 60800, Punjab Pakistan; Department of Chemistry, Institute of Southern Punjab, Multan, 60750, Pakistan.
| | - Faisal Shahzad
- Research and Innovation Center for Graphene and 2D Materials (RIC2D), Khalifa University, 127788, Abu Dhabi, United Arab Emirates; Department of Metallurgy and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - Yawar Abbas
- Research Scientist, Department of Physics, Khalifa University, 127788, Abu Dhabi, United Arab Emirates
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3
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Zenner J, Tran K, Kang L, Kinzel NW, Werlé C, DeBeer S, Bordet A, Leitner W. Synthesis, Characterization, and Catalytic Application of Colloidal and Supported Manganese Nanoparticles. Chemistry 2024; 30:e202304228. [PMID: 38415315 DOI: 10.1002/chem.202304228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 02/29/2024]
Abstract
Colloidal and supported manganese nanoparticles were synthesized following an organometallic approach and applied in the catalytic transfer hydrogenation (CTH) of aldehydes and ketones. Reaction parameters for the preparation of colloidal nanoparticles (NPs) were optimized to yield small (2-2.5 nm) and well-dispersed NPs. Manganese NPs were further immobilized on an imidazolium-based supported ionic phase (SILP) and characterized to evaluate NP size, metal loading, and oxidation states. Oxidation of the Mn NPs by the support was observed resulting in an average formal oxidation state of +2.5. The MnOx@SILP material showed promising performance in the CTH of aldehydes and ketones using 2-propanol as a hydrogen donor, outperforming previously reported Mn NPs-based CTH catalysts in terms of metal loading-normalized turnover numbers. Interestingly, MnOx@SILP were found to lose activity upon air exposure, which correlates with an additional increase in the average oxidation state of Mn as revealed by X-ray absorption spectroscopic studies.
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Affiliation(s)
- Johannes Zenner
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim, Germany
- Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
| | - Kelly Tran
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim, Germany
- Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
| | - Liqun Kang
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim, Germany
| | - Niklas W Kinzel
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim, Germany
- Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
| | - Christophe Werlé
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim, Germany
- Ruhr University Bochum, Universitätsstr. 150, 44801, Bochum, Germany
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim, Germany
| | - Alexis Bordet
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim, Germany
| | - Walter Leitner
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim, Germany
- Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
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4
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Dee G, O’Donoghue O, Devitt E, Giroud T, Rafferty A, Gannon L, McGuinness C, Gun’ko YK. Boron Nitride Nanosheet-Magnetic Nanoparticle Composites for Water Remediation Applications. ACS OMEGA 2024; 9:4347-4358. [PMID: 38313544 PMCID: PMC10832022 DOI: 10.1021/acsomega.3c06593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/24/2023] [Accepted: 01/04/2024] [Indexed: 02/06/2024]
Abstract
The combination of 0D nanoparticles with 2D nanomaterials has attracted a lot of attention over the last years due to the unique multimodal properties of resulting 0D-2D nanocomposites. In this work, we developed boron nitride nanosheets (BNNS) functionalized with manganese ferrite magnetic nanoparticles (MNPs). The functionalization process involved attachment of MNPs to exfoliated BNNS by refluxing the precursor materials in a polyol medium. Characterization of the produced BNNS-MNP composites was carried out using powder X-ray diffraction, transmission electron microscopy, vibrating sample magnetometry, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The adhesion of MnFe2O4 magnetic nanoparticles onto the BNNS remained unaffected by repeated sonication and heating in a furnace at 400 °C, underscoring the robust nature of the formed bond. FTIR spectra and XPS deconvolution confirmed the presence of strong bonding between BNNS and the MNPs. Membranes were fabricated from the BNNS and the BNNS-MnFe2O4 nanocomposites for evaluating their efficiency in removing the methylene blue dye pollutant. The membranes have been characterized by scanning electron microscopy, Brunauer-Emmett-Teller surface area analysis, and mercury intrusion porosimetry. The effectiveness of dye removal was monitored using ultraviolet-visible spectroscopy. The BNNS-MnFe2O4 nanocomposite membranes exhibited enhanced MB capture compared to membranes made from pure BNNS alone. The recyclability assessment of BNNS-MnFe2O4 demonstrated exceptional performance, retaining 92% efficiency even after eight cycles. These results clearly demonstrate the high potential of these magnetic nanocomposites as reusable materials for water filtration membranes. Furthermore, the introduction of magnetic functionality as part of the membrane brings an exciting opportunity for in situ magnetic heating of the membrane, which shall be explored in future work.
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Affiliation(s)
- Garret Dee
- School
of Chemistry, University of Dublin, Trinity
College, Dublin 2, Ireland
| | - Olivia O’Donoghue
- School
of Chemistry, University of Dublin, Trinity
College, Dublin 2, Ireland
| | - Eoin Devitt
- School
of Chemistry, University of Dublin, Trinity
College, Dublin 2, Ireland
| | - Tiphaine Giroud
- SIGMA
Clermont, Campus De Clermont-Ferrand, 63178 Aubiere Cedex, France
| | - Aran Rafferty
- School
of Chemistry, University of Dublin, Trinity
College, Dublin 2, Ireland
| | - Lee Gannon
- School
of Physics University of Dublin, Trinity
College, Dublin 2, Ireland
| | - Cormac McGuinness
- School
of Physics University of Dublin, Trinity
College, Dublin 2, Ireland
| | - Yurii K. Gun’ko
- School
of Chemistry, University of Dublin, Trinity
College, Dublin 2, Ireland
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5
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Ali OI, Azzam AB. Functional Ag-EDTA-modified MnO 2 nanocoral reef for rapid removal of hazardous copper from wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:123751-123769. [PMID: 37991610 PMCID: PMC10746771 DOI: 10.1007/s11356-023-30805-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 10/27/2023] [Indexed: 11/23/2023]
Abstract
A novel MnO2@EDTA-Ag nanocoral reef was constructed via a simplified redox reaction followed by EDTA and Ag nanoparticles impregnation to capture hazardous copper (II) from wastewater. A comprehensive characterization of the synthesized materials was conducted. The morphology of MnO2@EDTA-Ag in the form of a nanocoral reef was constructed of two-dimensional nanoplatelets and nanorod-like nanostructures. The optimal adsorption conditions proposed by the Plackett-Burman design (PBD) that would provide a removal % of 99.95 were pH 5.5, a contact time of 32.0 min, a Cu(II) concentration of 11.2 mg L-1, an adsorbent dose of 0.05 g, and a temperature of 40.3 °C. The loading of Ag nanoparticles onto MnO2@EDTA improved the adsorption capability of MnO2@EDTA-Ag. Additionally, the recyclability of MnO2@EDTA-Ag nanocoral reef was maintained at 80% after three adsorption-desorption cycles, and there was no significant change in the XRD analysis before and after the recycling process, implying its stability. It was found that nanocoral reef-assisted EDTA formed a chelation/complexation reaction between COO- groups and C-N bonds of EDTA with Cu(II) ions. In addition, X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) analysis proved the synergistic effect of the electrostatic interaction and chelation/complexation was responsible for the removal mechanism of Cu(II). Also, the results demonstrated no significant variation in MnO2@EDTA-Ag removal efficiency for all the tested real water samples, revealing its efficacy in wastewater treatment. Therefore, the current study suggests that MnO2@EDTA-Ag has substantial potential to be used as a feasible adsorbent for probable hazardous metals remediation.
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Affiliation(s)
- Omnia I Ali
- Chemistry Department, Faculty of Science, Helwan University, Cairo, 11795, Egypt.
| | - Ahmed B Azzam
- Chemistry Department, Faculty of Science, Helwan University, Cairo, 11795, Egypt
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6
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Ma M, Ye Z, Zhang J, Wang Y, Ning S, Yin X, Fujita T, Chen Y, Wu H, Wang X. Synthesis and fabrication of segregative and durable MnO 2@chitosan composite aerogel beads for uranium(VI) removal from wastewater. WATER RESEARCH 2023; 247:120819. [PMID: 37931357 DOI: 10.1016/j.watres.2023.120819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/21/2023] [Accepted: 10/30/2023] [Indexed: 11/08/2023]
Abstract
To address the imperative need for efficient removal of uranium-containing wastewater and mitigate radioactive contamination risks associated with nuclear energy, the development of materials with high removal efficiency and facile separation is crucial. This study designed and synthesised MnO2@chitosan (CTS) composite aerogel beads by in-situ growing δ-MnO2 on porous CTS aerogel beads. This approach not only mitigates the agglomeration of MnO2 nanospheres but also significantly enhances the porous structure and surface area of MnO2@CTS. These cost-effective and eco-friendly millimeter-scale spherical aerogels exhibited convenient separation properties after adsorption. These characteristics help mitigate the risk of equipment seam blockage and secondary pollution that are often associated with powdered adsorbents. Additionally, MnO2@CTS exhibited remarkable mechanical strength (stress approximately 0.55 MPa at 60 % strain), enabling rapid separation and easy regeneration while maintaining high adsorption performance even after five cycles. Significantly, MnO2@CTS exhibited a maximum adsorption capacity of 410.7 mg/g at pH 6 and 298 K, surpassing reported values for most CTS/MnO2-based adsorbents. The chemisorption process of U(VI) on MnO2@CTS followed the pseudo-second-order kinetic and Dubinin-Radushkevish models. X-ray photoelectron spectroscopy analysis further confirmed the reduction of U(VI) to U(V/IV). These findings highlight the substantial potential of MnO2@CTS aerogel beads for U(VI) removal from aqueous solutions, positioning them as a promising solution for addressing U(VI) contamination in wastewater.
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Affiliation(s)
- Mingyue Ma
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China
| | - Zhenxiong Ye
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China
| | - Jie Zhang
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China
| | - Youbin Wang
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China
| | - Shunyan Ning
- School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang 421001, PR China
| | - Xiangbiao Yin
- School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang 421001, PR China
| | - Toyohisa Fujita
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China
| | - Yanliang Chen
- Engineering Research Center of Nuclear Technology Application (East China Institute of Technology), Ministry of Education, Nanchang, 330013, PR China
| | - Hanyu Wu
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, PR China.
| | - Xinpeng Wang
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China.
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7
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Tohamy HAS, Taha G, Sultan M. Dialdehyde cellulose/gelatin hydrogel as a packaging material for manganese oxides adsorbents for wastewater remediation: Characterization and performance evaluation. Int J Biol Macromol 2023; 248:125931. [PMID: 37481186 DOI: 10.1016/j.ijbiomac.2023.125931] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 07/13/2023] [Accepted: 07/19/2023] [Indexed: 07/24/2023]
Abstract
The dialdehyde cellulose (DC) was used to synthesize gelatin-cellulose dialdehyde by Schiff base as a packaging material to manganese oxides nanoparticles adsorbents (Mn oxides@DC/Gel) for wastewater remediation and support the antimicrobial behavior of gelatin and DC. The crystallinity index% of microwave-synthesized DC prepared from cellulose II decreased from 43.18% to 34.11% and its oxidation degree was 143.77%. The greenly-produced Mn oxides were studied by XRD and TEM. XRD verified the presence of two different phases of α-MnO2 and α-Mn2O3 in the form of nanorods and nanocubes. Mn oxides@DC/Gel was investigated by FT-IR, XRD, XPS, SEM, swelling absorptivity, and thermal analysis. The optimal swelling ratio% of Mn oxides@DC/Gel nanocomposite was 1494.04±16.65%. The influence of pH on swelling ratios verified the instability of the imine group in acid and basic media. Mn oxides@DC/Gel nanocomposite hydrogel causes approximately two-fold greater inhibitory zones than gentamicin. The optimal adsorption conditions were adsorbent dose (0.05g), pH (9.0), contact time (120 min), and methylene blue dye concentration (30mg/L). The maximum adsorption capacity of Mn oxides@DC/Gel nanocomposite was 51.06±1.0 mg/g. The adsorption by Mn oxides@DC/Gel nanocomposite agrees with Langmuir, Redlich-Peterson, and Freundlich mechanisms.
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Affiliation(s)
- Hebat-Allah S Tohamy
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth St. (former El Tahrir st.), Dokki, Giza, P.O. 12622, Egypt
| | - Ghada Taha
- Pre-treatment and Finishing of Cellulose-based Textiles Department, National Research Centre, 33 El Bohouth St. (former El Tahrir st.), Dokki, Giza, P.O. 12622, Egypt.
| | - Maha Sultan
- Packaging Materials Department, National Research Centre, 33 El Bohouth St. (former El Tahrir st.), Dokki, Giza, P.O. 12622, Egypt
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8
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Bathula C, Meena A, Sekar S, Singh AN, Soni R, El-Marghany A, Palem RR, Kim HS. Self-Assembly of Copper Oxide Interfaced MnO 2 for Oxygen Evolution Reaction. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2329. [PMID: 37630914 PMCID: PMC10459404 DOI: 10.3390/nano13162329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/08/2023] [Accepted: 08/11/2023] [Indexed: 08/27/2023]
Abstract
Designing efficient electrocatalytic systems through facile synthesis remains a formidable task. To address this issue, this paper presents the design of a combination material comprising two transition metal oxides (copper oxide and manganese oxide (CuO/MnO2)), synthesized using a conventional microwave technique to efficiently engage as an active oxygen evolution reaction (OER) catalyst. The structural and morphological properties of the composite were confirmed by the aid of X-ray diffraction (XRD) studies, field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), and energy-dispersive spectrometry (EDS). FESEM clearly indicated well-aligned interlacing of CuO with MnO2. The OER performance was carried out in 1 M KOH. The assembled CuO/MnO2 delivered a benchmark current density (j = 10 mA cm-2) at a minimal overpotential (η = 294 mV), while pristine CuO required a high η (316 mV). Additionally, the CuO/MnO2 electrocatalyst exhibited stability for more than 15 h. These enhanced electrochemical performances were attributed to the large volume and expanded diameter of the pores, which offer ample surface area for catalytic reactions to boost OER. Furthermore, the rate kinetics of the OER are favored in composite due to low Tafel slope (77 mV/dec) compared to CuO (80 mV/dec).
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Affiliation(s)
- Chinna Bathula
- Division of Electronics and Electrical Engineering, Dongguk University–Seoul, Seoul 04620, Republic of Korea;
| | - Abhishek Meena
- Division of Physics and Semiconductor Science, Dongguk University-Seoul, Seoul 04620, Republic of Korea;
| | - Sankar Sekar
- Department of Semiconductor Science, Dongguk University-Seoul, Seoul 04620, Republic of Korea;
- Quantum-Functional Semiconductor Research Center, Dongguk University-Seoul, Seoul 04620, Republic of Korea
| | - Aditya Narayan Singh
- Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea;
| | - Ritesh Soni
- Department of Chemical Engineering, Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea;
| | - Adel El-Marghany
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
| | - Ramasubba Reddy Palem
- Department of Medical Biotechnology, Dongguk University, 32 Dongguk-ro, Ilsandong-gu, Goyang 10326, Republic of Korea
| | - Hyun-Seok Kim
- Division of Electronics and Electrical Engineering, Dongguk University–Seoul, Seoul 04620, Republic of Korea;
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Subjalearndee N, He N, Cheng H, Tesatchabut P, Eiamlamai P, Phothiphiphit S, Saensuk O, Limthongkul P, Intasanta V, Gao W, Zhang X. Wet Spinning of Graphene Oxide Fibers with Different MnO 2 Additives. ACS APPLIED MATERIALS & INTERFACES 2023; 15:19514-19526. [PMID: 37017220 DOI: 10.1021/acsami.3c02989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
We present the fabrication of graphene oxide (GO) and manganese dioxide (MnO2) composite fibers via wet spinning processes, which entails the effects of MnO2 micromorphology and mass loading on the extrudability of GO/MnO2 spinning dope and on the properties of resulted composite fibers. Various sizes of rod and sea-urchin shaped MnO2 microparticles have been synthesized via hydrothermal reactions with different oxidants and hydrothermal conditions. Both the microparticle morphology and mass loading significantly affect the extrudability of the GO/MnO2 mixture. In addition, the orientation of MnO2 microparticles within the fibers is largely affected by their microscopic surface areas. The composite fibers have been made electrically conductive via chemical or thermal treatments and then applied as fiber cathodes in Zn-ion battery prototypes. Thermal annealing under an argon atmosphere turns out to be an appropriate method to avoid MnO2 dissolution and leaching, which have been observed in the chemical treatments. These rGO/MnO2 fiber cathodes have been assembled into prototype Zn-ion batteries with Zn wire as the anode and xanthan-gum gel containing ZnSO4 and MnSO4 salts as the electrolyte. The resulted electrochemical output depends on the annealing temperature and MnO2 distribution within the fiber cathodes, while the best performer shows stable cycling stability at a maximum capacity of ca. 80 mA h/g.
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Affiliation(s)
- Nakarin Subjalearndee
- Fiber and Polymer Science Program, Wilson College of Textiles, North Carolina State University, 1020 Main Campus Drive, Raleigh, North Carolina 27606, United States
- National Nanotechnology Center, National Science and Technology Development Agency, 111 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand
| | - Nanfei He
- Fiber and Polymer Science Program, Wilson College of Textiles, North Carolina State University, 1020 Main Campus Drive, Raleigh, North Carolina 27606, United States
| | - Hui Cheng
- Fiber and Polymer Science Program, Wilson College of Textiles, North Carolina State University, 1020 Main Campus Drive, Raleigh, North Carolina 27606, United States
| | - Panpanat Tesatchabut
- National Energy Technology Center, National Science and Technology Development Agency, 114 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand
| | - Priew Eiamlamai
- National Energy Technology Center, National Science and Technology Development Agency, 114 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand
| | - Somruthai Phothiphiphit
- NSTDA Characterization and Testing Service Center, National Science and Technology Development Agency, 111 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand
| | - Orapan Saensuk
- NSTDA Characterization and Testing Service Center, National Science and Technology Development Agency, 111 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand
| | - Pimpa Limthongkul
- National Energy Technology Center, National Science and Technology Development Agency, 114 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand
| | - Varol Intasanta
- National Nanotechnology Center, National Science and Technology Development Agency, 111 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand
| | - Wei Gao
- Fiber and Polymer Science Program, Wilson College of Textiles, North Carolina State University, 1020 Main Campus Drive, Raleigh, North Carolina 27606, United States
| | - Xiangwu Zhang
- Fiber and Polymer Science Program, Wilson College of Textiles, North Carolina State University, 1020 Main Campus Drive, Raleigh, North Carolina 27606, United States
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10
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Yi H, Almatrafi E, Ma D, Huo X, Qin L, Li L, Zhou X, Zhou C, Zeng G, Lai C. Spatial confinement: A green pathway to promote the oxidation processes for organic pollutants removal from water. WATER RESEARCH 2023; 233:119719. [PMID: 36801583 DOI: 10.1016/j.watres.2023.119719] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 11/27/2022] [Accepted: 02/04/2023] [Indexed: 06/18/2023]
Abstract
Organic pollutants removal from water is pressing owing to the great demand for clean water. Oxidation processes (OPs) are the commonly used method. However, the efficiency of most OPs is limited owing to the poor mass transfer process. Spatial confinement is a burgeoning way to solve this limitation by use of nanoreactor. Spatial confinement in OPs would (i) alter the transport characteristics of protons and charges; (ii) bring about molecular orientation and rearrangement; (iii) cause the dynamic redistribution of active sites in catalyst and reduce the entropic barrier that is high in unconfined space. So far, spatial confinement has been utilized for various OPs, such as Fenton, persulfate, and photocatalytic oxidation. A comprehensive summary and discussion on the fundamental mechanisms of spatial confinement mediated OPs is needed. Herein, the application, performance and mechanisms of spatial confinement mediated OPs are overviewed firstly. Subsequently, the features of spatial confinement and their effects on OPs are discussed in detail. Furthermore, environmental influences (including environmental pH, organic matter and inorganic ions) are studied with analyzing their intrinsic connection with the features of spatial confinement in OPs. Lastly, challenges and future development direction of spatial confinement mediated OPs are proposed.
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Affiliation(s)
- Huan Yi
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P.R. China; Center of Research Excellence in Renewable Energy and Power Systems, Center of Excellence in Desalination Technology, Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Eydhah Almatrafi
- Center of Research Excellence in Renewable Energy and Power Systems, Center of Excellence in Desalination Technology, Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Dengsheng Ma
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P.R. China
| | - Xiuqing Huo
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P.R. China
| | - Lei Qin
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P.R. China
| | - Ling Li
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P.R. China
| | - Xuerong Zhou
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P.R. China
| | - Chengyun Zhou
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P.R. China; Center of Research Excellence in Renewable Energy and Power Systems, Center of Excellence in Desalination Technology, Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P.R. China; Center of Research Excellence in Renewable Energy and Power Systems, Center of Excellence in Desalination Technology, Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
| | - Cui Lai
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, P.R. China; Center of Research Excellence in Renewable Energy and Power Systems, Center of Excellence in Desalination Technology, Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
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11
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Cai Y, Yang K, Qiu C, Bi Y, Tian B, Bi X. A Review of Manganese-Oxidizing Bacteria (MnOB): Applications, Future Concerns, and Challenges. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:1272. [PMID: 36674036 PMCID: PMC9859543 DOI: 10.3390/ijerph20021272] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 01/05/2023] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
Groundwater serving as a drinking water resource usually contains manganese ions (Mn2+) that exceed drinking standards. Based on the Mn biogeochemical cycle at the hydrosphere scale, bioprocesses consisting of aeration, biofiltration, and disinfection are well known as a cost-effective and environmentally friendly ecotechnology for removing Mn2+. The design of aeration and biofiltration units, which are critical components, is significantly influenced by coexisting iron and ammonia in groundwater; however, there is no unified standard for optimizing bioprocess operation. In addition to the groundwater purification, it was also found that manganese-oxidizing bacteria (MnOB)-derived biogenic Mn oxides (bioMnOx), a by-product, have a low crystallinity and a relatively high specific surface area; the MnOB supplied with Mn2+ can be developed for contaminated water remediation. As a result, according to previous studies, this paper summarized and provided operational suggestions for the removal of Mn2+ from groundwater. This review also anticipated challenges and future concerns, as well as opportunities for bioMnOx applications. These could improve our understanding of the MnOB group and its practical applications.
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Affiliation(s)
- Yanan Cai
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
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12
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Su L, Zhong J, Xu J, Wu H, Zhang Z, Xiong Y. Sunlight‐assisted environmentally-friendly synthesis of graphene-like δ-MnO2 nanosheets for colorimetric sensing. FLATCHEM 2022; 36:100451. [DOI: 10.1016/j.flatc.2022.100451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
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13
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Li M, Kuang S, Dong J, Ma H, Kang Y. Performance and mechanisms of Cr(VI) removal by nano-MnO2 with different lattices. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Asim U, Husnain SM, Abbas N, Shahzad F, Zafar S, Younis SA, Kim KH. Microwave-assisted synthesis of MnO 2 nanosorbent for adsorptive removal of Cs(I) and Sr(II) from water solutions. CHEMOSPHERE 2022; 303:135088. [PMID: 35636609 DOI: 10.1016/j.chemosphere.2022.135088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 05/20/2022] [Accepted: 05/21/2022] [Indexed: 06/15/2023]
Abstract
In this study, a flower-like porous δ-MnO2 nanostructure was synthesized by a microwave-assisted hydrothermal process for adsorptive removal of strontium (Sr(II)) and cesium (Cs(I)) from wastewater. The prepared δ-MnO2 nanosorbent exhibited superior affinity for Sr(II) over Cs(I) in the single-solute system, with partition coefficient (PC) values of 10.2 and 2.3 L/g, respectively, at pH 6.0. In the two-solute system, the flower-like δ-MnO2 also adsorbed Sr(II) (PC = 3.81 L/g) more selectively than Cs(I) (PC 1.15 L/g). Further, their adsorption capacities decreased by 12 and 16%, respectively, relative to the single-solute system. In contrast, adsorption of the ions onto δ-MnO2 was affected less sensitively in dual than in single system when changes occurred in environmental variables such as pH (2-8) and ionic strength (1-100 mM). Adsorption kinetics, thermodynamics, and isotherm studies demonstrated the pivotal role of the monolayer surface active sites of endothermic δ-MnO2 (e.g., a complexation interaction with Mn-OH). Furthermore, the δ-MnO2 nanosorbent exhibited good regenerability, retaining more than 80% of its adsorption capacity when tested over four reuse cycles. The overall results of this study are expected to help establish strategies to effectively remove metal contaminants from wastewater using a green and low-cost hierarchical nanosorbent.
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Affiliation(s)
- Umar Asim
- Institute of Chemical Sciences Bahauddin Zakariya University, Multan, Punjab, 60800, Pakistan; Department of Engineering & Applied Technology, Institute of Southern Punjab, Multan, 60000, Pakistan
| | - Syed M Husnain
- Chemistry Division, Directorate of Science, Pakistan Institute of Nuclear Science and Technology (PINSTECH), Islamabad, 45650, Pakistan.
| | - Naseem Abbas
- Institute of Chemical Sciences Bahauddin Zakariya University, Multan, Punjab, 60800, Pakistan.
| | - Faisal Shahzad
- National Center for Nanotechnology, Department of Metallurgy and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - Shagufta Zafar
- Department of Chemistry, The Government Sadiq College Women University, Bahawalpur, 63000, Pakistan
| | - Sherif A Younis
- Department of Civil and Environmental Engineering, Hanyang University, Seoul, 04763, Republic of Korea; Analysis and Evaluation Department, Egyptian Petroleum Research Institute, Nasr City, Cairo, 11727, Egypt
| | - Ki-Hyun Kim
- Department of Civil and Environmental Engineering, Hanyang University, Seoul, 04763, Republic of Korea.
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15
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Belozerova AA, Pechishcheva NV, Estemirova SK, Sterkhov EV, Shunyaev KY. Sorption Properties of the Manganese(IV) Oxide/Mechanically Activated Graphite Composite with Respect to As(III) Compounds. RUSS J APPL CHEM+ 2022. [DOI: 10.1134/s1070427222040127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Jain H, Kumar A, Rajput VD, Minkina T, Verma AK, Wadhwa S, Dhupper R, Chandra Garg M, Joshi H. Fabrication and characterization of high-performance forward-osmosis membrane by introducing manganese oxide incited graphene quantum dots. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 305:114335. [PMID: 34952392 DOI: 10.1016/j.jenvman.2021.114335] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
Forward osmosis (FO) is the futuristic membrane desalination technology as it transcends the disadvantages of other pressure-driven techniques. But, there still remain critical challenges like fabrication of highly permeable membrane with ideal structures maintaining high rejection rates that need to be addressed for implementation as a practical technology. In this work, novel thin-film composite (TFC) membranes were fabricated by means of incorporating manganese oxide (MnO2) incited graphene quantum dots (GQDs) nanocomposite into a cellulose acetate (CA) suspension followed by phase inversion (PI) for enhanced FO performance. The surface morphology and chemical structure of fabricated membranes were studied using various characterization techniques like XRD, FT-IR, SEM-EDS, Mapping, AFM, and TGA. The structural parameters, water flux, reverse salt flux and salt rejection was estimated on the basis of data obtained from four varying initial draw solution concentrations. At high nanocomposites stacking, the hydrophilicity of the casting blend increase, and subsequently, the PI exchange rate additionally increases, which brings about noticeable difference in the surface morphology. The membrane with 0.5 wt% nanocomposite exhibited superior FO separation performance with osmotic water flux of 18.89, 34.49, 41.76 and 42.34 in L.m-2.h-1 with variable concentrations of NaCl salt solution (0.25M, 0.5M, 1M, and 2M), respectively. Also, the porosity of the membrane was increased to 47.23% with 96.87% salt rejection. The results indicate that the hydrophilicity of the nanocomposite drives them to the interface among CA and water during PI process leading to solid hydrogen bonding to achieve high water permeability.
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Affiliation(s)
- Harshita Jain
- Amity Institute of Environmental Sciences, Amity University Uttar Pradesh, Noida Sector-125, Uttar Pradesh, 201313, India
| | - Ajay Kumar
- Department of Hydrology, Indian Institute of Technology Roorkee, Uttarakhand, 247667, India
| | - Vishnu D Rajput
- Academy of Biology and Biotechnology, Southern Federal University, 344090, Rostov-on-Don, Russia
| | - Tatiana Minkina
- Academy of Biology and Biotechnology, Southern Federal University, 344090, Rostov-on-Don, Russia
| | - Anoop Kumar Verma
- School of Energy and Environment, Thapar Institute of Engineering and Technology, Patiala, Punjab, 147005, India
| | - Shikha Wadhwa
- Department of Chemistry, School of Engineering, University of Petroleum & Energy Studies, Bidholi Campus, Dehradun, Uttarakhand, 248007, India
| | - Renu Dhupper
- Amity Institute of Environmental Sciences, Amity University Uttar Pradesh, Noida Sector-125, Uttar Pradesh, 201313, India
| | - Manoj Chandra Garg
- Amity Institute of Environmental Sciences, Amity University Uttar Pradesh, Noida Sector-125, Uttar Pradesh, 201313, India.
| | - Himanshu Joshi
- Department of Hydrology, Indian Institute of Technology Roorkee, Uttarakhand, 247667, India
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17
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Shaheen SM, Mosa A, El-Naggar A, Faysal Hossain M, Abdelrahman H, Khan Niazi N, Shahid M, Zhang T, Fai Tsang Y, Trakal L, Wang S, Rinklebe J. Manganese oxide-modified biochar: production, characterization and applications for the removal of pollutants from aqueous environments - a review. BIORESOURCE TECHNOLOGY 2022; 346:126581. [PMID: 34923078 DOI: 10.1016/j.biortech.2021.126581] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 12/09/2021] [Accepted: 12/12/2021] [Indexed: 06/14/2023]
Abstract
The development of manganese (Mn) oxides (MnOx) modified biochar (MnOBC) for the removal of pollutants from water has received significant attention. However, a comprehensive review focusing on the use of MnOBC for the removal of organic and inorganic pollutants from water is missing. Therefore, the preparation and characterization of MnOBC, and its capacity for the removal of inorganic (e.g., toxic elements) and organic (e.g., antibiotics and dyes) from water have been discussed in relation to feedstock properties, pyrolysis temperature, modification ratio, and environmental conditions here. The removal mechanisms of pollutants by MnOBC and the fate of the sorbed pollutants onto MnOBC have been reviewed. The impregnation of biochar with MnOx improved its surface morphology, functional group modification, and elemental composition, and thus increased its sorption capacity. This review establishes a comprehensive understanding of synthesizing and using MnOBC as an effective biosorbent for remediation of contaminated aqueous environments.
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Affiliation(s)
- Sabry M Shaheen
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; King Abdulaziz University, Faculty of Meteorology, Environment, and Arid Land Agriculture, Department of Arid Land Agriculture, 21589 Jeddah, Saudi Arabia; University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33516, Kafr El-Sheikh, Egypt
| | - Ahmed Mosa
- Soils Department, Faculty of Agriculture, Mansoura University, 35516 Mansoura, Egypt
| | - Ali El-Naggar
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou 311300, PR China; Department of Soil Sciences, Faculty of Agriculture, Ain Shams University, Cairo 11241, Egypt; Department of Renewable Resources, 442 Earth Sciences Building, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
| | - Md Faysal Hossain
- Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, New Territories 999077, Hong Kong, PR China
| | - Hamada Abdelrahman
- Cairo University, Faculty of Agriculture, Soil Science Department, Giza 12613 Egypt
| | - Nabeel Khan Niazi
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan
| | - Muhammad Shahid
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehari, Pakistan
| | - Tao Zhang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China
| | - Yiu Fai Tsang
- Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, New Territories 999077, Hong Kong, PR China
| | - Lukáš Trakal
- Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Praha 6 Suchdol, Czech Republic
| | - Shengsen Wang
- College of Environmental Science and Engineering, Yangzhou University, 196 W Huayang Rd, Yangzhou, Jiangsu, PR China
| | - Jörg Rinklebe
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; University of Sejong, Department of Environment, Energy and Geoinformatics, Guangjin-Gu, Seoul 05006, Republic of Korea.
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18
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Ragupathi H, Arockiaraj M. A, Choe Y. A novel β-MnO 2 and carbon nanotube composite with potent electrochemical properties synthesized using a microwave-assisted method for use in supercapacitor electrodes. NEW J CHEM 2022. [DOI: 10.1039/d2nj02579e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In this work, we report the synthesis of a novel β-MnO2/CNT nanocomposite with good electrical conductivity for high-performance supercapacitors via a microwave-assisted method.
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Affiliation(s)
| | - Antony Arockiaraj M.
- Department of Physics, St. Joseph's College, Affiliated to Bharathidasan University, Trichirappalli, 620002, Tamil Nadu, India
| | - Youngson Choe
- Department of Chemical Engineering, Pusan National University, Busan, South Korea
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19
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Zhang S, Hedtke T, Wang L, Wang X, Cao T, Elimelech M, Kim JH. Engineered Nanoconfinement Accelerating Spontaneous Manganese-Catalyzed Degradation of Organic Contaminants. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:16708-16715. [PMID: 34852199 DOI: 10.1021/acs.est.1c06551] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Manganese(III/IV) oxide minerals are known to spontaneously degrade organic pollutants in nature. However, the kinetics are too slow to be useful for engineered water treatment processes. Herein, we demonstrate that nanoscale Mn3O4 particles under nanoscale spatial confinement (down to 3-5 nm) can significantly accelerate the kinetics of pollutant degradation, nearly 3 orders of magnitude faster compared to the same reaction in the unconfined bulk phase. We first employed an anodized aluminum oxide scaffold with uniform channel dimensions for experimental and computational studies. We found that the observed kinetic enhancement resulted from the increased surface area of catalysts exposed to the reaction, as well as the increased local proton concentration at the Mn3O4 surface and subsequent acceleration of acid-catalyzed reactions even at neutral pH in bulk. We further demonstrate that a reactive Mn3O4-functionalized ceramic ultrafiltration membrane, a more suitable scaffold for realistic water treatment, achieved nearly complete removal of various phenolic and aniline pollutants, operated under a common ultrafiltration water flux. Our findings mark an important advance toward the development of catalytic membranes that can degrade pollutants in addition to their intrinsic function as a physical separation barrier, especially since they are based on accelerating natural catalytic pathways that do not require any chemical addition.
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Affiliation(s)
- Shuo Zhang
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Ave, New Haven, Connecticut 06511, United States
| | - Tayler Hedtke
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Ave, New Haven, Connecticut 06511, United States
| | - Li Wang
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Ave, New Haven, Connecticut 06511, United States
| | - Xiaoxiong Wang
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Ave, New Haven, Connecticut 06511, United States
| | - Tianchi Cao
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Ave, New Haven, Connecticut 06511, United States
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Ave, New Haven, Connecticut 06511, United States
| | - Jae-Hong Kim
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Ave, New Haven, Connecticut 06511, United States
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20
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Dutta S, Srivastava SK, Gupta B, Gupta AK. Hollow Polyaniline Microsphere/MnO 2/Fe 3O 4 Nanocomposites in Adsorptive Removal of Toxic Dyes from Contaminated Water. ACS APPLIED MATERIALS & INTERFACES 2021; 13:54324-54338. [PMID: 34727690 DOI: 10.1021/acsami.1c15096] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Dyes are considered as recalcitrant compounds and are not easily removed through conventional water treatment processes. The present study demonstrated the fabrication of polyaniline hollow microsphere (PNHM)/MnO2/Fe3O4 composites by in situ deposition of MnO2 and Fe3O4 nanoparticles on the surface of PNHM. The physicochemical characteristics and adsorption behavior of the prepared PNHM/MnO2/Fe3O4 composites towards the removal of toxic methyl green (MG) and Congo red (CR) dyes have been investigated. The characterization study revealed the successful synthesis of the prepared PNHM/MnO2/Fe3O4 adsorbent with a high Brunauer-Emmett-Teller (BET) surface area of 191.79 m2/g. The batch adsorption study showed about 88 and 98% adsorption efficiencies for MG and CR dyes, respectively, at an optimum dose of 1 g/L of PNHM/MnO2/Fe3O4 at pH ∼6.75 at room temperature (303 ± 3 K). The adsorption phenomena of MG and CR dyes were well described by the Elovich and pseudo-second-order kinetics, respectively, and Freundlich isotherm model. The thermodynamics study shows that the adsorption reactions were endothermic and spontaneous in nature. The maximum adsorption capacity (Qmax) for MG and CR dyes was observed as 1142.13 and 599.49 mg/g, respectively. The responsible adsorption mechanisms involved in dye removal were electrostatic interaction, ion exchange, and the formation of the covalent bonds. The coexisting ion study revealed that the presence of phosphate co-ion considerably reduced the CR dye removal efficiency. However, the desorption-regeneration study demonstrated the successful reuse of the spent PNHM/MnO2/Fe3O4 material for the adsorption of MG and CR dyes for several cycles. Given the aforementioned findings, the PNHM/MnO2/Fe3O4 nanocomposites could be considered as a promising adsorbent for the remediation of dye-contaminated water.
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Affiliation(s)
- Soumi Dutta
- School of Water Resources, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | | | - Bramha Gupta
- School of Water Resources, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Ashok Kumar Gupta
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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21
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Kinetic insights on the oxidation of acetaminophen and caffeine by a Mn(IV)3 complex. TRANSIT METAL CHEM 2021. [DOI: 10.1007/s11243-021-00474-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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The study of MnO2 with different crystalline structures for U(VI) elimination from aqueous solution. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116296] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Zong Y, Ma S, Gao J, Xu M, Xue J, Wang M. Synthesis of Porphyrin Zr-MOFs for the Adsorption and Photodegradation of Antibiotics under Visible Light. ACS OMEGA 2021; 6:17228-17238. [PMID: 34278109 PMCID: PMC8280686 DOI: 10.1021/acsomega.1c00919] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 05/24/2021] [Indexed: 05/25/2023]
Abstract
The release of antibiotics into the water environment can pose a serious threat to human and ecological health, so it is of great significance to effectively remove antibiotics from wastewater. In this work, porphyrinic zirconium metal-organic framework material, PCN-224, was first explored for the adsorption removal of antibiotics from water using tetracycline (TC) and ciprofloxacin (CIP) as examples. We prepared a series of PCN-224 with different particle sizes (150 nm, 300 nm, 500 nm, and 6 μm). Benefiting from the huge surface area (1616 m2 g-1), the 300 nm-PCN-224 sample had the best adsorption properties for TC and CIP. Remarkably, it exhibits fast removal rates and high adsorption capacities of 354.81 and 207.16 mg g-1 for TC and CIP, respectively. The adsorption of TC and CIP in 300 nm-PCN-224 is consistent with the pseudo-second-order kinetic model and Langmuir isotherm model, which indicates that the adsorption can be regarded as homogeneous monolayer chemisorption, and the adsorption is exothermic, which has been confirmed by thermodynamic studies. Under visible-light irradiation, 300 nm-PCN-224 exhibited high photocatalytic activity for TC and CIP. The adsorption studies confirmed that the adsorption of adsorbates takes place via the formation of hydrogen bonding, π-π interactions, and electrostatic attraction. In addition, the adsorbent can be simply regenerated by photocatalysis under visible light, and the adsorption-desorption efficiency is still above 85% after repeated use five times. The work of MOFs to remove antibiotics from water shows that MOFs have great potential in this field and are worthy of further study.
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Affiliation(s)
- Yuqing Zong
- School
of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Shuaishuai Ma
- College
of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China
| | - Jiamin Gao
- School
of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Minjing Xu
- School
of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Jinjuan Xue
- School
of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Mingxin Wang
- School
of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, P. R. China
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24
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Cai Y, He J. Degradation of ciprofloxacin by the Mn cycle system (MnCS): Construction, characterization and bacterial analysis. ENVIRONMENTAL RESEARCH 2021; 195:110860. [PMID: 33581090 DOI: 10.1016/j.envres.2021.110860] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 01/03/2021] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
The release of Mn(II) occurs in the degradation of organic matters by manganese ore (MnO2), resulting in a reduced efficiency. During the degradation of ciprofloxacin (CIP), in a biofilter, this paper put forward a novel method that similar to the geo-cycle of Mn (MnCS) on the Earth to regenerate MnO2. The freshly prepared MnO2 was suitable for the use in the MnCS. It indicated that the mutual conversion between Mn(II), Mn(III), and Mn(IV) in the MnCS, which was driven by CIP and manganese oxidizing bacteria (MnOB), could maintain the activity of MnO2. The MnCS showed feasibility in the coexistence of ammonia or humic acid, and provided a kinetic degradation. The physicochemical features of MnO2 before and after bio-regeneration were characterized by TEM, XRD, BET, and XPS. It was found that the morphological structure of MnO2 became loose and the maximum peak of pore size distribution became smaller, but the increase of surface area, the change of Mn(III/IV) content, and the decrease of crystallinity favored the bio-regeneration process. Moreover, as a mediator in the MnCS, the group of MnOB was dramatically inhibited by CIP, and the bacterial community had changed significantly. The typical MnOB shared low abundance in the biofilter, while the rarely reported genera (e.g. Sphingomonas) that related to the formation of Mn deposits appeared to be involved in the MnCS.
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Affiliation(s)
- Yanan Cai
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China.
| | - Jing He
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
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Yang P, Wen K, Beyer KA, Xu W, Wang Q, Ma D, Wu J, Zhu M. Inhibition of Oxyanions on Redox-driven Transformation of Layered Manganese Oxides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:3419-3429. [PMID: 33600156 DOI: 10.1021/acs.est.0c06310] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Layered manganese (Mn) oxides, such as birnessite, can reductively transform into other phases and thereby affect the environmental behavior of Mn oxides. Solution chemistry strongly influences the transformation, but the effects of oxyanions remain unknown. We determined the products and rates of Mn(II)-driven reductive transformation of δ-MnO2, a nanoparticulate hexagonal birnessite, in the presence of phosphate or silicate at pH 6-8 and a wide range of Mn(II)/MnO2 molar ratios. Without the oxyanions, δ-MnO2 transforms into triclinic birnessite (T-bir) and 4 × 4 tunneled Mn oxide (TMO) at low Mn(II)/MnO2 ratios (0.09 and 0.13) and into δ-MnOOH and Mn3O4 with minor poorly crystallized α- and γ-MnOOH at high Mn(II)/MnO2 ratios (0.5 and 1). The presence of phosphate or silicate substantially decreases the rate and extent of the above transformation, probably due to adsorption of the oxyanions on layer edges or the formation of Mn(II,III)-oxyanion ternary complexes on vacancies of δ-MnO2, adversely interfering with electron transfer, Mn(III) distribution, and structural rearrangements. The oxyanions also reduce the crystallinity and particle sizes of the transformation products, ascribed to adsorption of the oxyanions on the products, preventing their further particle growth. This study enriches our understanding of the solution chemistry control on redox-driven transformation of Mn oxides.
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Affiliation(s)
- Peng Yang
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Ke Wen
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Kevin A Beyer
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Wenqian Xu
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Qian Wang
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Dong Ma
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
- College of Resource and Environment, Qingdao Agricultural University, Qingdao, Shandong 266109, China
| | - Juan Wu
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
- College of Resource and Environment, Qingdao Agricultural University, Qingdao, Shandong 266109, China
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
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Yang R, Fan Y, Ye R, Tang Y, Cao X, Yin Z, Zeng Z. MnO 2 -Based Materials for Environmental Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2004862. [PMID: 33448089 DOI: 10.1002/adma.202004862] [Citation(s) in RCA: 112] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/31/2020] [Indexed: 06/12/2023]
Abstract
Manganese dioxide (MnO2 ) is a promising photo-thermo-electric-responsive semiconductor material for environmental applications, owing to its various favorable properties. However, the unsatisfactory environmental purification efficiency of this material has limited its further applications. Fortunately, in the last few years, significant efforts have been undertaken for improving the environmental purification efficiency of this material and understanding its underlying mechanism. Here, the aim is to summarize the recent experimental and computational research progress in the modification of MnO2 single species by morphology control, structure construction, facet engineering, and element doping. Moreover, the design and fabrication of MnO2 -based composites via the construction of homojunctions and MnO2 /semiconductor/conductor binary/ternary heterojunctions is discussed. Their applications in environmental purification systems, either as an adsorbent material for removing heavy metals, dyes, and microwave (MW) pollution, or as a thermal catalyst, photocatalyst, and electrocatalyst for the degradation of pollutants (water and gas, organic and inorganic) are also highlighted. Finally, the research gaps are summarized and a perspective on the challenges and the direction of future research in nanostructured MnO2 -based materials in the field of environmental applications is presented. Therefore, basic guidance for rational design and fabrication of high-efficiency MnO2 -based materials for comprehensive environmental applications is provided.
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Affiliation(s)
- Ruijie Yang
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
| | - Yingying Fan
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
| | - Ruquan Ye
- Department of Chemistry, State Key Lab of Marine Pollution, City University of Hong Kong, Hong Kong, 999077, P. R. China
| | - Yuxin Tang
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Xiehong Cao
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang, 310014, P. R. China
| | - Zongyou Yin
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Zhiyuan Zeng
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China
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Yaqub A, Shafiq Q, Khan AR, Husnain SM, Shahzad F. Recent advances in the adsorptive remediation of wastewater using two-dimensional transition metal carbides (MXenes): a review. NEW J CHEM 2021. [DOI: 10.1039/d1nj00772f] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
MXenes, since their discovery in 2011, have garnered significant research attention for a variety of applications due to their exciting physico-chemical properties.
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Affiliation(s)
- Azra Yaqub
- Chemistry Division
- Directorate of Science
- Pakistan Institute of Nuclear Science and Technology (PINSTECH)
- Islamabad
- Pakistan
| | - Qamar Shafiq
- National Center for Nanotechnology
- Department of Metallurgy and Materials Engineering
- Pakistan Institute of Engineering and Applied Sciences (PIEAS)
- Islamabad 45650
- Pakistan
| | - Abdul Rehman Khan
- Materials Division
- Directorate of Technology
- Pakistan Institute of Nuclear Science and Technology (PINSTECH)
- Islamabad
- Pakistan
| | - Syed M. Husnain
- Chemistry Division
- Directorate of Science
- Pakistan Institute of Nuclear Science and Technology (PINSTECH)
- Islamabad
- Pakistan
| | - Faisal Shahzad
- National Center for Nanotechnology
- Department of Metallurgy and Materials Engineering
- Pakistan Institute of Engineering and Applied Sciences (PIEAS)
- Islamabad 45650
- Pakistan
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28
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Liu S, Zhou X, Lv C, Liu R, Li S, Yang G. A novel bromelain-MnO 2 biosensor for colorimetric determination of dopamine. NEW J CHEM 2021. [DOI: 10.1039/d0nj05066k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We report a method for determining dopamine in serum via colorimetric sensing. This new method adopts bromelain-templated MnO2 nanosheets that possess high oxidase activity. 3,3′,5,5′-Tetramethylbenzidine (TMB) can be directly oxidized by bromelain-MnO2 nanosheets to oxTMB products.
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Affiliation(s)
- Shimeng Liu
- College of Public Health
- University of South China
- Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine
- Hengyang 421001
- China
| | - Xiayu Zhou
- College of Public Health
- University of South China
- Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine
- Hengyang 421001
- China
| | - Changyin Lv
- College of Public Health
- University of South China
- Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine
- Hengyang 421001
- China
| | - Ran Liu
- College of Public Health
- University of South China
- Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine
- Hengyang 421001
- China
| | - Shiya Li
- College of Public Health
- University of South China
- Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine
- Hengyang 421001
- China
| | - Guiying Yang
- College of Public Health
- University of South China
- Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine
- Hengyang 421001
- China
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29
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Li H, Li X, Ding J, Li X, Zhao W, Liu M, Yu W. Hierarchical nano-porous biochar prepared by a MgO template method for high performance of PNP adsorption. NEW J CHEM 2021. [DOI: 10.1039/d1nj00157d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hierarchical nano-porous biochar (HNBC) derived from Enteromorpha prolifera (EP) was prepared using a facile MgO templated strategy, which exhibits a remarkable adsorption performance for p-nitrophenol (PNP).
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Affiliation(s)
- Honghai Li
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Xiaoke Li
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Junwei Ding
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Xin Li
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Wenting Zhao
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Mengxiao Liu
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Wenlong Yu
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
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30
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Turunç E, Akay S, Baran T, Kalderis D, Tsubota T, Kayan B. An easily fabricated palladium nanocatalyst on magnetic biochar for Suzuki–Miyaura and aryl halide cyanation reactions. NEW J CHEM 2021. [DOI: 10.1039/d1nj00941a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A sustainable biochar material for the synthesis of a novel heterogeneous catalyst for organic reactions is reported.
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Affiliation(s)
- Ersan Turunç
- Advanced Technology of Education
- Research and Application Center
- Mersin University
- Mersin
- Turkey
| | - Sema Akay
- Department of Chemistry
- Faculty of Science and Letters
- Aksaray University
- 68100 Aksaray
- Turkey
| | - Talat Baran
- Department of Chemistry
- Faculty of Science and Letters
- Aksaray University
- 68100 Aksaray
- Turkey
| | - Dimitrios Kalderis
- Department of Electronic Engineering
- Hellenic Mediterranean University
- Chania 73100
- Greece
| | - Toshiki Tsubota
- Department of Applied Chemistry
- Faculty of Engineering
- Kyushu Institute of Technology
- Kitakyushu 804-8550
- Japan
| | - Berkant Kayan
- Department of Chemistry
- Faculty of Science and Letters
- Aksaray University
- 68100 Aksaray
- Turkey
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31
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A Review of Recent Progress on Nano MnO2: Synthesis, Surface Modification and Applications. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01823-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Rathi B, Jamieson J, Sun J, Siade AJ, Zhu M, Cirpka OA, Prommer H. Process-based modeling of arsenic(III) oxidation by manganese oxides under circumneutral pH conditions. WATER RESEARCH 2020; 185:116195. [PMID: 32738605 DOI: 10.1016/j.watres.2020.116195] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/05/2020] [Accepted: 07/16/2020] [Indexed: 05/12/2023]
Abstract
Numerous experimental studies have identified a multi-step reaction mechanism to control arsenite (As(III)) oxidation by manganese (Mn) oxides. The studies highlighted the importance of edge sites and intermediate processes, e.g., surface passivation by reaction products. However, the identified reaction mechanism and controlling factors have rarely been evaluated in a quantitative context. In this study, a process-based modeling framework was developed to delineate and quantify the relative contributions and rates of the different processes affecting As(III) oxidation by Mn oxides. The model development and parameterization were constrained by experimental observations from literature studies involving environmentally relevant Mn oxides at circumneutral pH using both batch and stirred-flow reactors. Our modeling results highlight the importance of a transitional phase, solely evident in the stirred-flow experiments, where As(III) oxidation gradually shifts from fast reacting Mn(IV) to slowly reacting Mn(III) edge sites. The relative abundance of these edge sites was the most important factor controlling the oxidation rate, whereas surface passivation restricted oxidation only in the stirred-flow experiment. The Mn(III) edge sites were demonstrated to play a crucial role in the oxidation and therefore in controlling the long-term fate of As. This study provided an improved understanding of Mn oxide reactivity and the significance in the cycling of redox-sensitive metal(loid)s in the environment.
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Affiliation(s)
- Bhasker Rathi
- Center for Applied Geoscience, University of Tübingen, Tübingen, Germany; School of Earth Sciences, University of Western Australia, Crawley WA 6009, Australia; CSIRO Land and Water, Private Bag No. 5, Wembley WA 6913, Australia
| | - James Jamieson
- School of Earth Sciences, University of Western Australia, Crawley WA 6009, Australia; CSIRO Land and Water, Private Bag No. 5, Wembley WA 6913, Australia
| | - Jing Sun
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; School of Earth Sciences, University of Western Australia, Crawley WA 6009, Australia; CSIRO Land and Water, Private Bag No. 5, Wembley WA 6913, Australia.
| | - Adam J Siade
- School of Earth Sciences, University of Western Australia, Crawley WA 6009, Australia; CSIRO Land and Water, Private Bag No. 5, Wembley WA 6913, Australia; National Centre for Groundwater Research and Training (NCGRT), Australia
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management, University of Wyoming, Laramie WY 82071 United States
| | - Olaf A Cirpka
- Center for Applied Geoscience, University of Tübingen, Tübingen, Germany
| | - Henning Prommer
- School of Earth Sciences, University of Western Australia, Crawley WA 6009, Australia; CSIRO Land and Water, Private Bag No. 5, Wembley WA 6913, Australia; National Centre for Groundwater Research and Training (NCGRT), Australia.
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Upcycling of Wastewater via Effective Photocatalytic Hydrogen Production Using MnO 2 Nanoparticles-Decorated Activated Carbon Nanoflakes. NANOMATERIALS 2020; 10:nano10081610. [PMID: 32824542 PMCID: PMC7466657 DOI: 10.3390/nano10081610] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/11/2020] [Accepted: 08/14/2020] [Indexed: 01/13/2023]
Abstract
In the present work, we demonstrated the upcycling technique of effective wastewater treatment via photocatalytic hydrogen production by using the nanocomposites of manganese oxide-decorated activated carbon (MnO2-AC). The nanocomposites were sonochemically synthesized in pure water by utilizing MnO2 nanoparticles and AC nanoflakes that had been prepared through green routes using the extracts of Brassica oleracea and Azadirachta indica, respectively. MnO2-AC nanocomposites were confirmed to exist in the form of nanopebbles with a high specific surface area of ~109 m2/g. When using the MnO2-AC nanocomposites as a photocatalyst for the wastewater treatment, they exhibited highly efficient hydrogen production activity. Namely, the high hydrogen production rate (395 mL/h) was achieved when splitting the synthetic sulphide effluent (S2− = 0.2 M) via the photocatalytic reaction by using MnO2-AC. The results stand for the excellent energy-conversion capability of the MnO2-AC nanocomposites, particularly, for photocatalytic splitting of hydrogen from sulphide wastewater.
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