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Cordoba A, Saldias C, Urzúa M, Montalti M, Guernelli M, Focarete ML, Leiva A. On the Versatile Role of Electrospun Polymer Nanofibers as Photocatalytic Hybrid Materials Applied to Contaminated Water Remediation: A Brief Review. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:756. [PMID: 35269244 PMCID: PMC8912311 DOI: 10.3390/nano12050756] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/14/2022] [Accepted: 02/18/2022] [Indexed: 02/04/2023]
Abstract
A wide variety of materials, strategies, and methods have been proposed to face the challenge of wastewater pollution. The most innovative and promising approaches include the hybrid materials made of polymeric nanofibers and photocatalytic nanoparticles. Electrospun nanofibers with unique properties, such as nanosized diameter, large specific surface area, and high aspect ratio, represent promising materials to support and stabilize photocatalytic nanosized semiconductors. Additionally, the role performed by polymer nanofibers can be extended even further since they can act as an active medium for the in situ synthesis of photocatalytic metal nanoparticles or contribute to pollutant adsorption, facilitating their approach to the photocatalytic sites and their subsequent photodegradation. In this paper, we review the state of the art of electrospun polymer/semiconductor hybrid nanofibers possessing photocatalytic activity and used for the remediation of polluted water by light-driven processes (i.e., based on photocatalytic activity). The crucial role of polymer nanofibers and their versatility in these types of procedures are emphasized.
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Affiliation(s)
- Alexander Cordoba
- Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, Pontifical Catholic University of Chile, Santiago 7820436, Chile; (A.C.); (C.S.)
- Department of Chemistry “Giacomo Ciamician” and National Consortium of Materials Science and Technology (I.N.S.T.M., Bologna RU), Alma Mater Studiorum–Università di Bologna, 40126 Bologna, Italy; (M.M.); (M.G.)
| | - Cesar Saldias
- Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, Pontifical Catholic University of Chile, Santiago 7820436, Chile; (A.C.); (C.S.)
| | - Marcela Urzúa
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago 7820436, Chile;
| | - Marco Montalti
- Department of Chemistry “Giacomo Ciamician” and National Consortium of Materials Science and Technology (I.N.S.T.M., Bologna RU), Alma Mater Studiorum–Università di Bologna, 40126 Bologna, Italy; (M.M.); (M.G.)
| | - Moreno Guernelli
- Department of Chemistry “Giacomo Ciamician” and National Consortium of Materials Science and Technology (I.N.S.T.M., Bologna RU), Alma Mater Studiorum–Università di Bologna, 40126 Bologna, Italy; (M.M.); (M.G.)
| | - Maria Letizia Focarete
- Department of Chemistry “Giacomo Ciamician” and National Consortium of Materials Science and Technology (I.N.S.T.M., Bologna RU), Alma Mater Studiorum–Università di Bologna, 40126 Bologna, Italy; (M.M.); (M.G.)
- Health Sciences and Technologies-Interdepartmental Center for Industrial Research, Alma Mater Studiorum–Università di Bologna, 40126 Bologna, Italy
| | - Angel Leiva
- Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, Pontifical Catholic University of Chile, Santiago 7820436, Chile; (A.C.); (C.S.)
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Covaliu-Mierlă CI, Matei E, Stoian O, Covaliu L, Constandache AC, Iovu H, Paraschiv G. TiO2–Based Nanofibrous Membranes for Environmental Protection. MEMBRANES 2022; 12:membranes12020236. [PMID: 35207157 PMCID: PMC8875440 DOI: 10.3390/membranes12020236] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/04/2022] [Accepted: 02/10/2022] [Indexed: 11/16/2022]
Abstract
Electrospinning is a unique technique that can be used to synthesize polymer and metal oxide nanofibers. In materials science, a very active field is represented by research on electrospun nanofibers. Fibrous membranes present fascinating features, such as a large surface area to volume ratio, excellent mechanical behavior, and a large surface area, which have many applications. Numerous techniques are available for the nanofiber’s synthesis, but electrospinning is presented as a simple process that allows one to obtain porous membranes containing smooth non-woven nanofibers. Titanium dioxide (TiO2) is the most widely used catalyst in photocatalytic degradation processes, it has advantages such as good photocatalytic activity, excellent chemical stability, low cost and non-toxicity. Thus, titanium dioxide (TiO2) is used in the synthesis of nanofibrous membranes that benefit experimental research by easy recyclability, excellent photocatalytic activity, high specific surface areas, and exhibiting stable hierarchical nanostructures. This article presents the synthesis of fiber membranes through the processes of electrospinning, coaxial electrospinning, electrospinning and electrospraying or electrospinning and precipitation. In addition to the synthesis of membranes, the recent progress of researchers emphasizing the efficiency of nanofiber photocatalytic membranes in removing pollutants from wastewater is also presented.
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Affiliation(s)
- Cristina Ileana Covaliu-Mierlă
- Department of Biotechnical Systems, Faculty of Biotechnical Systems Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania; (C.I.C.-M.); (O.S.); (L.C.); (A.-C.C.); (G.P.)
| | - Ecaterina Matei
- Department of Biotechnical Systems, Faculty of Biotechnical Systems Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania; (C.I.C.-M.); (O.S.); (L.C.); (A.-C.C.); (G.P.)
- Correspondence: ; Tel.: +40-72-454-3926
| | - Oana Stoian
- Department of Biotechnical Systems, Faculty of Biotechnical Systems Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania; (C.I.C.-M.); (O.S.); (L.C.); (A.-C.C.); (G.P.)
| | - Leon Covaliu
- Department of Biotechnical Systems, Faculty of Biotechnical Systems Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania; (C.I.C.-M.); (O.S.); (L.C.); (A.-C.C.); (G.P.)
| | - Alexandra-Corina Constandache
- Department of Biotechnical Systems, Faculty of Biotechnical Systems Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania; (C.I.C.-M.); (O.S.); (L.C.); (A.-C.C.); (G.P.)
| | - Horia Iovu
- Advanced Polymer Materials Group, University Politehnica of Bucharest, 132 Calea Grivitei, 010737 Bucharest, Romania;
| | - Gigel Paraschiv
- Department of Biotechnical Systems, Faculty of Biotechnical Systems Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania; (C.I.C.-M.); (O.S.); (L.C.); (A.-C.C.); (G.P.)
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Seid MG, Byun J, Kim W, Cho K, Hong SW. Changes in levels of N-nitrosamine formed from amine-containing compounds during chloramination via photocatalytic pretreatment with immobilized TiO 2: Effect of source water and pH. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127398. [PMID: 34879584 DOI: 10.1016/j.jhazmat.2021.127398] [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: 07/05/2021] [Revised: 09/19/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
We investigated the effectiveness of photocatalytic pretreatment (PCP) of precursors in minimizing the formation potentials (FPs) of carcinogenic nitrosamines, including N-nitrosodimethylamine (NDMA), N-nitrosodiethylamine (NDEA), and N-nitrosodiethanolamine (NDELA), during water chloramination. A steel mesh substrate with immobilized TiO2 was highly efficient at mitigating nitrosamine formation and removing targeted precursors such as ranitidine, nizatidine, trimebutine, triethanolamine, and metoclopramide. Compared to UVC/H2O2, PCP under UVA irradiation (intensity of 0.67 mW cm-2) was more effective for reducing nitrosamine-FPs during post-chloramination. However, the PCP efficacies varied with the water source, pretreatment pH, and irradiation time. For example, PCP of eutrophic water increased the NDMA-FPs, but produced notable reductions (up to 99%) for NDELA- and NDEA-FPs. Shorter irradiation times, up to 15 min, increased the NDELA-FP in triethanolamine, and the NDMA-FP in nizatidine and trimebutine. However, the nitrosamine-FP decreased by > 50% after PCP at a pH > 5.6, following irradiation for 120 min. Oxygen addition, N-de(m)ethylation, and N-dealkylation were responsible for decreasing nitrosamine-FPs via the destruction of key moieties; this has been elucidated by mass spectroscopy. This study suggests that PCP could be used as an alternative strategy for minimizing nitrosamine-FPs during water treatment.
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Affiliation(s)
- Mingizem Gashaw Seid
- Water Cycle Research Center, Korea Institute of Science and Technology, Hwarangro 14 gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea; Division of Energy and Environment Technology, KIST-School, University of Science and Technology, Seoul 02792, Republic of Korea
| | - Jeehye Byun
- Water Cycle Research Center, Korea Institute of Science and Technology, Hwarangro 14 gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea; Division of Energy and Environment Technology, KIST-School, University of Science and Technology, Seoul 02792, Republic of Korea
| | - Wooyul Kim
- Department of Chemical and Biological Engineering/Research Institute of Global Environment, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Kangwoo Cho
- Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea; Institute for Convergence Research and Education in Advanced Technology (I-CREATE), Yonsei University, Incheon 406-840, Republic of Korea
| | - Seok Won Hong
- Water Cycle Research Center, Korea Institute of Science and Technology, Hwarangro 14 gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea; Division of Energy and Environment Technology, KIST-School, University of Science and Technology, Seoul 02792, Republic of Korea.
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Hsu JS, Yu TY, Wei DJ, Jane WN, Chang YT. Degradation of Decabromodiphenyl Ether in an Aerobic Clay Slurry Microcosm Using a Novel Immobilization Technique. Microorganisms 2022; 10:microorganisms10020402. [PMID: 35208857 PMCID: PMC8877889 DOI: 10.3390/microorganisms10020402] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/07/2022] [Accepted: 02/07/2022] [Indexed: 11/16/2022] Open
Abstract
A novel chitosan immobilization technique that entraps photocatalyst and microbes was developed and applied to decompose decabromodiphenyl ether (BDE-209) in a clay slurry microcosm. The optimized conditions for immobilization were obtained by mixing 1.2% (w/v) chitosan dissolved in 1% (v/v) acetic acid with nano-TiO2 particles and the BDE-209-degrading bacterial mixed culture. This aqueous mixture was injected into 1% (w/v) water solution containing sodium tripolyphosphate to form spherical immobilized beads. The surface of the immobilized beads was reinforced by 0.25% (v/v) glutaraldehyde cross-linking. These beads had enough mechanical strength during BDE-209 degradation to maintain their shape in the system at a stirring rate of 200-rpm, while undergoing continuous 365 nm UVA irradiation. This novel TiO2-Yi-Li immobilized chitosan beads system allowed a successful simultaneous integration of photolysis, photocatalysis and biodegradation to remove BDE-209. The remaining percentage of BDE-209 was 41% after 70 days of degradation using this system. The dominant bacteria in the BDE-209-degrading bacterial mixed culture during remediation were Chitinophaga spp., Methyloversatilis spp., Terrimonas spp. and Pseudomonas spp. These bacteria tolerated the long-term UVA irradiation and high-level free radicals present, while utilizing BDE-209 as their primary carbon resource. This new method has great potential for the treatment of a range of pollutants.
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Affiliation(s)
- Jung-Shan Hsu
- Department of Microbiology, Soochow University, No.70 Linxi Rd., Shilin Dist., Taipei 11112, Taiwan; (J.-S.H.); (T.-Y.Y.); (D.-J.W.)
- Department of Pathology, University of Alabama at Birmingham, P210 West Pavilion 619 South 19th Street, Birmingham, AL 35233-7331, USA
| | - Ting-Yu Yu
- Department of Microbiology, Soochow University, No.70 Linxi Rd., Shilin Dist., Taipei 11112, Taiwan; (J.-S.H.); (T.-Y.Y.); (D.-J.W.)
| | - Da-Jiun Wei
- Department of Microbiology, Soochow University, No.70 Linxi Rd., Shilin Dist., Taipei 11112, Taiwan; (J.-S.H.); (T.-Y.Y.); (D.-J.W.)
| | - Wann-Neng Jane
- Academia Sinica, Institute of Plant and Microbial Biology, 128 Sec. 2 Academia Rd., Nankang, Taipei 11529, Taiwan;
| | - Yi-Tang Chang
- Department of Microbiology, Soochow University, No.70 Linxi Rd., Shilin Dist., Taipei 11112, Taiwan; (J.-S.H.); (T.-Y.Y.); (D.-J.W.)
- Correspondence: ; Tel.: +886-2-2881-9471 (ext. 6862)
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Lyu C, Zhang L, He D, Su B, Lyu Y. Micrometer-sized NiOOH hierarchical spheres for enhanced degradation of sulfadiazine via synergistic adsorption and catalytic oxidation in peroxymonosulfate system. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.07.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Huang Z, Zhu D, Wang H, Luo J, Zhao C, Du F. Facile fabrication of electrospun g-C3N4/Bi12O17Cl2/poly(acrylonitrile-co-maleic acid) heterojunction nanofibers for boosting visible-light catalytic ofloxacin degradation. NEW J CHEM 2022. [DOI: 10.1039/d1nj05928a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Electrospun g-C3N4/Bi12O17Cl2/poly(acrylonitrile-co-maleic acid) nanofibers were fabricated and applied for highly efficient removal of ofloxacin.
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Affiliation(s)
- Zhujun Huang
- College of Biological and Environmental Engineering, Changsha University, Changsha 410022, China
| | - Dongying Zhu
- College of Biological and Environmental Engineering, Changsha University, Changsha 410022, China
| | - Haiyan Wang
- College of Biological and Environmental Engineering, Changsha University, Changsha 410022, China
| | - Jinhua Luo
- College of Biological and Environmental Engineering, Changsha University, Changsha 410022, China
| | - Chenxi Zhao
- College of Biological and Environmental Engineering, Changsha University, Changsha 410022, China
| | - Fuyou Du
- College of Biological and Environmental Engineering, Changsha University, Changsha 410022, China
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Qi K, Song M, Xie X, Wen Y, Wang Z, Wei B, Wang Z. CQDs/biochar from reed straw modified Z-scheme MgIn 2S 4/BiOCl with enhanced visible-light photocatalytic performance for carbamazepine degradation in water. CHEMOSPHERE 2022; 287:132192. [PMID: 34517240 DOI: 10.1016/j.chemosphere.2021.132192] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/27/2021] [Accepted: 09/05/2021] [Indexed: 06/13/2023]
Abstract
The application of environmental-friendly and sustainable green materials in constructing photocatalysts to degrade pharmaceuticals and personal care products (PPCPs) attracts more attention. Herein, biochar (BC) or biomass carbon quantum dots (CQDs) were used to modify MgIn2S4/BiOCl (MB) heterojunction photocatalyst with Z-scheme structure, and improved the photocatalytic degradation performance for carbamazepine (CBZ) in the aqueous solution. Both BC and CQDs could form electron transfer interface with MB heterojunction, resulting in the photodegradation rate of MgIn2S4/BiOCl/CQDs (MBC, 96.43%) and MgIn2S4/BiOCl/BC (MBB, 88.09%) to CBZ within 120 min visible-light irradiation, which were significantly higher than that of MB (65.84%). Moreover, photoelectrochemical and photoluminescence tests verified that CQDs could act as a bridge for storing and transferring electrons in the entire Z-scheme system. Thence, compared with MBB, MBC could produce more •OH and •O2- under the visible light, which was indicated by the results of radical quenching experiments and electron paramagnetic resonance. Interestingly, under the natural sunlight, the photocatalytic performance of MBC to CBZ was even better than under laboratory conditions. In addition, the TOC removal efficiencies of MBB and MBC could reach 85.09% and 93.79% respectively, and ECOSAR program was utilized to further evaluate the eco-toxicity of CBZ and the intermediates towards fish, daphnid, and green algae, indicating that the photocatalytic process involving MBB and MBC showed outstanding toxicity reduction performance. Finally, compared with other composites, MBB and MBC showed higher photocatalytic performance and lower energy consumption, which would provide a green strategy for biochar materials in the photocatalytic treatment of PPCPs in water.
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Affiliation(s)
- Kemin Qi
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Mengxi Song
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Xiaoyun Xie
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China.
| | - Yuan Wen
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Zirun Wang
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Bin Wei
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Zhaowei Wang
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
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Li H, Su Z. In-situ evolution of anodic TiO2 nanotubes to ammonium oxofluorotitanate mesocrystals and their conversion to mesocrystalline TiO2. Electrochem commun 2021. [DOI: 10.1016/j.elecom.2021.107163] [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] Open
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Degradation of Minocycline by the Adsorption-Catalysis Multifunctional PVDF-PVP-TiO 2 Membrane: Degradation Kinetics, Photocatalytic Efficiency, and Toxicity of Products. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182312339. [PMID: 34886061 PMCID: PMC8656511 DOI: 10.3390/ijerph182312339] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/21/2021] [Accepted: 11/22/2021] [Indexed: 11/17/2022]
Abstract
The photocatalytic degradation of minocycline was studied by using polyvinylidene fluoride-polyvinylpyrrolidone-TiO2 (PVDF-PVP-TiO2) fiber mats prepared by an electrospinning technology. The influences of the TiO2 dosage, minocycline concentrations, inorganic anions, pH values, and dissolved organic matter (DOM) concentrations on the degradation kinetics were investigated. A mass of 97% minocycline was degraded in 45 min at 5% TiO2 dosage. The corresponding decomposition rate constant was 0.069 min-1. The inorganic anions affected the minocycline decomposition in the order of HCO3- > Cl- > SO42- > NO3-, which was confirmed by the results of electron spin resonance (ESR) spectra. The lowest electrical energy per order (EEO) was 6.5 Wh/L. Over five cycles, there was no change in the photocatalytic performance of the degrading minocycline. Those investigations suggested that effective degradation of minocycline could be reached in the PVDF-PVP-TiO2 fiber mats with a low energy consumption, good separation and, good recovery. Three photocatalytic decomposition pathways of minocycline were proposed: (i) hydroxyl substitution of the acylamino group; (ii) hydroxyl substitution of the amide group, and (iii) a cleavage of the methyl groups and further oxidation of the amino group by OH. Potential risks caused by TP159 and TP99 should not be ignored, while the TP90 are nontoxic. Tests indicated that the toxicity of the photocatalytic process may be persistent if minocycline and its products were not mineralized completely.
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Peroxymonosulfate Activation by Bi 2WO 6/BiOCl Heterojunction Nanocomposites under Visible Light for Bisphenol A Degradation. NANOMATERIALS 2021; 11:nano11113130. [PMID: 34835894 PMCID: PMC8621688 DOI: 10.3390/nano11113130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/07/2021] [Accepted: 11/17/2021] [Indexed: 11/17/2022]
Abstract
The combination of peroxymonosulfate (PMS) activation and photocatalysis has proven to be effective for organic contaminants treatment. However, the construction of an efficient catalytic material is an important challenge. Herein, novel Bi2WO6/BiOCl heterojunction nanocomposites were successfully designed and fabricated using a facile and effective strategy for bisphenol A (BPA) photodegradation with PMS activation. The well-designed heterojunction with improvement of the contact area and interface microstructure was obtained through in situ growth of the Bi2WO6 on the surface of BiOCl. The Bi2WO6/BiOCl nanocomposites exhibit excellent catalytic performance in PMS activation for BPA degradation under visible light irradiation. A possible photocatalytic reaction mechanism was systematically revealed. The excellent catalytic performance is mainly attributed to the strong interaction between Bi2WO6 and BiOCl, resulting in an enhanced photoabsorption and a more efficient interfacial charge separation and transfer. This paper provides a novel strategy to design efficient catalytic materials for organic contaminants remediation with PMS activation.
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Wang K, He H, Wei B, Zhang TC, Chang H, Li Y, Tian X, Fan Y, Liang Y, Yuan S. Multifunctional Switchable Nanocoated Membranes for Efficient Integrated Purification of Oil/Water Emulsions. ACS APPLIED MATERIALS & INTERFACES 2021; 13:54315-54323. [PMID: 34735107 DOI: 10.1021/acsami.1c15024] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Surfaces with unusual under-liquid dual superlyophobicity are attractive on account of their widespread applications, but their development remains difficult due to thermodynamic contradiction. Additionally, these surfaces may suffer from limited antifouling ability, which has restricted their practical applications. Herein, we report a successful in situ growth of a hybrid zeolitic imidazolate framework-8 and zinc oxide nanorod on a porous poly(vinylidene fluoride) membrane (ZIF-8@ZnO-PPVDF) and its application as a self-cleaning switchable barrier material in rapid filtration for emulsified oily wastewater. The novel ZIF-8@ZnO-PPVDF exhibits superior mechanical strength, reversible under-liquid dual superlyophobicity, photocatalytic self-cleaning property, and an effective alternate separation capacity toward both oil-in-water (O/W) and water-in-oil (W/O) emulsions with ultrahigh fluxes and efficiencies (>99%). By simply using a "bait-hook-eliminate" method to separate the O/W emulsions containing soluble organic pollutants, we demonstrate that the ZIF-8@ZnO-PPVDF can achieve stable separation fluxes over 600 L m-2 h-1 with high efficiencies and be completely/nondestructively regenerated by visible-light irradiation after each cycle. This study would demonstrate a new approach to prepare an under-liquid dual superlyophobic revivable membrane for various applications.
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Affiliation(s)
- Kai Wang
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environmental Engineering, Sichuan University, Chengdu, 610065, P. R. China
- Beijing Advanced Innovation Center for Biomedical Engineering, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China
| | - Huaqiang He
- Low-carbon Technology & Chemical Reaction Engineering Lab, College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Baibing Wei
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environmental Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Tian C Zhang
- Civil & Environmental Engineering Department, University of Nebraska-Lincoln, Omaha, Nebraska 68182-0178, United States
| | - Haiqing Chang
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environmental Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Yingqi Li
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environmental Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Xiaobao Tian
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environmental Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Yubo Fan
- Beijing Advanced Innovation Center for Biomedical Engineering, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China
| | - Ying Liang
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environmental Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Shaojun Yuan
- Civil & Environmental Engineering Department, University of Nebraska-Lincoln, Omaha, Nebraska 68182-0178, United States
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Cao N, Zhao X, Gao M, Li Z, Ding X, Li C, Liu K, Du X, Li W, Feng J, Ren Y, Wei T. Superior selective adsorption of MgO with abundant oxygen vacancies to removal and recycle reactive dyes. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119236] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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63
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Multifunctional, Robust, and Porous PHBV-GO/MXene Composite Membranes with Good Hydrophilicity, Antibacterial Activity, and Platelet Adsorption Performance. Polymers (Basel) 2021; 13:polym13213748. [PMID: 34771308 PMCID: PMC8588032 DOI: 10.3390/polym13213748] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 10/26/2021] [Accepted: 10/26/2021] [Indexed: 01/09/2023] Open
Abstract
The limitations of hydrophilicity, strength, antibacterial activity adsorption performance of the biobased and biocompatible polymer materials, such as polyhydroxyalkanoates (PHAs), significantly restrict their wider applications especially in medical areas. In this paper, a novel composite membrane with high antibacterial activity and platelet adsorption performance was prepared based on graphene oxide (GO), MXene and 3-hydroxybutyrate-co-hydroxyvalerate (PHBV), which are medium-chain-length-copolymers of PHA. The GO/MXene nanosheets can uniformly inset on the surface of PHBV fibre and give the PHBV—GO/MXene composite membranes superior hydrophilicity due to the presence of hydroxyl groups and terminal oxygen on the surface of nanosheets, which further provides the functional site for the free radical polymerization of ester bonds between GO/MXene and PHBV. As a result, the tensile strength, platelet adsorption, and blood coagulation time of the PHBV—GO/MXene composite membranes were remarkably increased compared with those of the pure PHBV membranes. The antibacterial rate of the PHBV—GO/MXene composite membranes against gram-positive and gram-negative bacteria can reach 97% due to the antibacterial nature of MXene. The improved strength, hydrophilicity, antibacterial activity and platelet adsorption performance suggest that PHBV—GO/MXene composite membranes might be ideal candidates for multifunctional materials for haemostatic applications.
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Electrospinning of a Copolymer PVDF- co-HFP Solved in DMF/Acetone: Explicit Relations among Viscosity, Polymer Concentration, DMF/Acetone Ratio and Mean Nanofiber Diameter. Polymers (Basel) 2021; 13:polym13193418. [PMID: 34641233 PMCID: PMC8512270 DOI: 10.3390/polym13193418] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 12/23/2022] Open
Abstract
The process of electrospinning polymer solutions depends on many entry parameters, with each having a significant impact on the overall process and where complexity prevents the expression of their interplay. However, under the assumption that most parameters are fixed, it is possible to evaluate the mutual relations between pairs or triples of the chosen parameters. In this case, the experiments were carried out with a copolymer poly(vinylidene-co-hexafluoropropylene) solved in mixed N,N'-dimethylformamide (DMF)/acetone solvent for eight polymer concentrations (8, 10, 12, 15, 18, 21, 24, and 27 wt.%) and five DMF/acetone ratios (1/0, 4/1, 2/1, 1/1, 1/2). Processing of the obtained data (viscosity, mean nanofiber diameter) aimed to determine algebraic expressions relating both to viscosity and a mean nanofiber diameter with polymer concentration, as well as DMF/acetone ratio. Moreover, a master curve relating these parameters with no fitting factors was proposed continuously covering a sufficiently broad range of concentration as well as DMF/acetone ratio. A comparison of algebraic evaluation with the experimental data seems to be very good (the mean deviation for viscosity was about 2%, while, for a mean nanofiber diameter was slightly less than 10%).
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Nguyen HT, Pham MT, Nguyen TMT, Bui HM, Wang YF, You SJ. Modifications of conventional organic membranes with photocatalysts for antifouling and self-cleaning properties applied in wastewater filtration and separation processes: A review. SEP SCI TECHNOL 2021. [DOI: 10.1080/01496395.2021.1982981] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Hieu Trung Nguyen
- Department of Civil Engineering, Chung Yuan Christian University, Taoyuan City, Taiwan
- Institute of Applied Technology, Thu Dau Mot University, Thu Dau Mot City, Binh Duong Province, Vietnam
- Center for Environmental Risk Management, Chung Yuan Christian University, Taoyuan City, Taiwan
| | - Minh-Thuan Pham
- Department of Civil Engineering, Chung Yuan Christian University, Taoyuan City, Taiwan
- Center for Environmental Risk Management, Chung Yuan Christian University, Taoyuan City, Taiwan
| | - Truc-Mai Thi Nguyen
- Center for Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung, Taiwan, ROC
| | - Ha Manh Bui
- Department of Environmental Sciences, Saigon University, Ho Chi Minh City, Vietnam
| | - Ya-Fen Wang
- Center for Environmental Risk Management, Chung Yuan Christian University, Taoyuan City, Taiwan
- Department of Environmental Engineering, Chung Yuan Christian University, Taoyuan City, Taiwan
| | - Sheng-Jie You
- Center for Environmental Risk Management, Chung Yuan Christian University, Taoyuan City, Taiwan
- Department of Environmental Engineering, Chung Yuan Christian University, Taoyuan City, Taiwan
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Zhang HC, Liu YL, Wang L, Li ZY, Lu XH, Yang T, Ma J. Enhanced Radical Generation in an Ultraviolet/Chlorine System through the Addition of TiO 2. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:11612-11623. [PMID: 34415770 DOI: 10.1021/acs.est.0c08785] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Ultraviolet (UV)/chlorine draws increasing attention for the abatement of recalcitrant organic pollutants. Herein, it was found that TiO2 would significantly promote the degradation of dimethyl phthalate (DMP) in the UV/chlorine system (from 19 to 84%). Hydroxyl radicals (HO•) and chlorine radicals (Cl•) were the dominant reactive species for DMP degradation in the UV/chlorine/TiO2 system. Chlorine decayed much faster in UV/chlorine/TiO2 compared with UV/chlorine, which is possibly because photogenerated electrons (ecb-) and superoxide radicals (O2•-) have high reactivity with chlorine. As a result, the recombination of photogenerated holes (hvb+) and ecb- was inhibited and the accumulation of HO• and Cl• was facilitated. A kinetic model was established to simulate the reaction process, and it was found that the concentrations of HO• and Cl• were several times to dozens of times higher in UV/chlorine/TiO2 than that in UV/chlorine. The contributions of HO• and Cl• to DMP degradation were 70.3 and 29.7% by model simulation, respectively, and were close to the probe experiment result. In the UV/chlorine/TiO2 system, the degradation of DMP did not follow pseudo-first-order kinetics but the degradation of benzoate fitted well with pseudo-first-order kinetics. This phenomenon was elucidated by the structure of the pollutant and TiO2 and further tested by calculating the adsorption energy (Eads)/binding energy (Eb) with density functional theory. Due to faster decay of chlorine, lower amounts of disinfection byproducts formed in UV/chlorine/TiO2 compared with UV/chlorine. Adding TiO2 into the UV/chlorine system can promote the degradation of recalcitrant organic pollutants in an aqueous environment.
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Affiliation(s)
- Hao-Chen Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yu-Lei Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Lu Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Zhuo-Yu Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xiao-Hui Lu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Tao Yang
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, China
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
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Wang D, Mueses MA, Márquez JAC, Machuca-Martínez F, Grčić I, Peralta Muniz Moreira R, Li Puma G. Engineering and modeling perspectives on photocatalytic reactors for water treatment. WATER RESEARCH 2021; 202:117421. [PMID: 34390948 DOI: 10.1016/j.watres.2021.117421] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
The debate on whether photocatalysis can reach full maturity at commercial level as an effective and economical process for treatment and purification of water and wastewater has recently intensified. Despite a bloom of scientific investigations in the last 30 years, particularly with regards to innovative photocatalytic materials, photocatalysis has so far seen a few industrial applications. Regardless of the points of view, it has been realized that research on reactor design and modeling are now equally urgent to match the extensive research carried out on innovative photocatalytic materials. In reality, the development of photocatalytic reactors has advanced steadily in terms of modeling and reactor design over the last two decades, though this topic has captured a smaller specialized audience. In this critical review, we introduce the latest developments on photocatalytic reactors for water treatment from an engineering perspective. The focus is on the modeling and design of photocatalytic reactors for water treatment at pilot- or at greater scale. Photocatalytic reactors utilizing both natural sunlight and UV irradiation sources are comprehensively discussed. The most promising photoreactor designs and models are examined giving key design guidelines. Other engineering considerations, such as operation, cost analysis, patents, and several industrial applications of photocatalytic reactors for water treatment are also presented. The dissemination of key photocatalytic reactor design principles among the scientific community and the water industry is currently one of the greatest obstacles in translating PWT research into widespread real-world application.
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Affiliation(s)
- Dawei Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
| | - Miguel Angel Mueses
- Photocatalysis & Solar Photoreactors Engineering, Modeling & Application of AOPs, Chemical Engineering Program, Universidad de Cartagena, Zip code 1382-Postal 195, Cartagena, Colombia
| | - José Angel Colina Márquez
- Photocatalysis & Solar Photoreactors Engineering, Modeling & Application of AOPs, Chemical Engineering Program, Universidad de Cartagena, Zip code 1382-Postal 195, Cartagena, Colombia
| | | | - Ivana Grčić
- Faculty of Geotechnical Engineering, Department for Environmental Engineering, University of Zagreb, Hallerova aleja 7, Varaždin HR-42000, Croatia
| | - Rodrigo Peralta Muniz Moreira
- Environmental Nanocatalysis & Photoreaction Engineering, Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom
| | - Gianluca Li Puma
- Environmental Nanocatalysis & Photoreaction Engineering, Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom.
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Du C, Wang Z, Liu G, Wang W, Yu D. One-step electrospinning PVDF/PVP-TiO2 hydrophilic nanofiber membrane with strong oil-water separation and anti-fouling property. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126790] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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69
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Westerhoff P, Alvarez PJ, Kim J, Li Q, Alabastri A, Halas NJ, Villagran D, Zimmerman J, Wong MS. Utilizing the Broad Electromagnetic Spectrum and Unique Nanoscale Properties for Chemical-Free Water Treatment. Curr Opin Chem Eng 2021; 33:100709. [PMID: 34804780 PMCID: PMC8597955 DOI: 10.1016/j.coche.2021.100709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Clean water is critical for drinking, industrial processes, and aquatic organisms. Existing water treatment and infrastructure are chemically-intensive and based on nearly century-old technologies that fail to meet modern large and decentralized communities. The next-generation of water processes can transition from outdated technologies by utilizing nanomaterials to harness energy from across the electromagnetic spectrum, enabling electrified and solar-based technologies. The last decade was marked by tremendous improvements in nanomaterial design, synthesis, characterization, and assessment of material properties. Realizing the benefits of these advances requires placing greater attention on embedding nanomaterials onto and into surfaces within reactors and applying external energy sources. This will allow nanomaterial-based processes to replace Victorian-aged, chemical intensive water treatment technologies.
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Affiliation(s)
- Paul Westerhoff
- School of Sustainable Engineering and the Built Environment, Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Arizona State University, Tempe, Arizona 85287-3005, United States
| | - Pedro J.J. Alvarez
- Civil and Environmental Engineering, Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Rice University, Houston, TX 77005
| | - Jaehong Kim
- Department of Chemical and Environmental Engineering, Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Yale University, 17 Hillhouse Avenue, New Haven, Connecticut 06511, United States
| | - Qilin Li
- Civil and Environmental Engineering, Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Rice University, Houston, TX 77005
| | - Alessandro Alabastri
- Department of Electrical and Computer Engineering, Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Rice University, Houston, TX 77005
| | - Naomi J. Halas
- Department of Electrical and Computer Engineering, Laboratory for Nanophotonics, Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Department of Physics and Astronomy, Department of Chemistry, Rice University, Houston, Texas 77005
| | - Dino Villagran
- Department of Chemistry and Biochemistry, Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Julie Zimmerman
- School of the Environment, Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Yale University, New Haven, CT 06511, USA
| | - Michael S. Wong
- Department of Chemical and Biomolecular Engineering, Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Rice University, Houston, Texas 77005, United States
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Fei J, Han Z, Deng Y, Wang T, Zhao J, Wang C, Zhao X. Enhanced photocatalytic performance of iron phthalocyanine/TiO2 heterostructure at joint fibrous interfaces. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126901] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Choy S, Bui HT, Van Lam D, Lee SM, Kim W, Hwang DS. Photocatalytic exoskeleton: Chitin nanofiber for retrievable and sustainable TiO 2 carriers for the decomposition of various pollutants. Carbohydr Polym 2021; 271:118413. [PMID: 34364555 DOI: 10.1016/j.carbpol.2021.118413] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 06/18/2021] [Accepted: 07/07/2021] [Indexed: 10/20/2022]
Abstract
Loading a photocatalytic TiO2 to organic carriers has been desired for volumetric TiO2 incorporation, facile retrieval, and sustainable utilization. Traditionally, suspended TiO2 nanoparticles or its thin film on two-dimensional substrate are popularly fabricated for pollutants decomposition without carriers; due to poor thermomechanical properties of the organic carriers. Herein, a combination of the chitin nanofiber carrier and atomic layer deposition proves relevance for formation of anatase TiO2 thin layer so that photocatalytic decomposition in three-dimensional surface. Moreover, chitin nanofiber is capable of holding the TiO2 nanoparticles for multiple cycles of photocatalysis. Those types of TiO2 show characteristic degradation performance for gaseous (acetaldehyde) and aqueous pollutants (4-chlorophenol and rhodamine B). After catalytic reaction, chitin/TiO2 is retrievable owing to carrier's robustness even in water without TiO2 aggregation and loss. This work suggests that chitin-based photocatalyst is applicable to numerous pollutants through chitin's relatively high chemical resistance and stably wedged TiO2 during photocatalytic reaction.
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Affiliation(s)
- Seunghwan Choy
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), 77 Chengam-ro, Nam-gu, Pohang 37673, Republic of Korea
| | - Hoang Tran Bui
- Department of Chemical and Biological Engineering College of Engineering, Sookmyung Women's University, Seoul, Republic of Korea
| | - Do Van Lam
- Department of Nanomechanics, Korea Institute of Machinery and Materials (KIMM), 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Republic of Korea; Nano Mechatronics, Korea University of Science and Technology (UST), 217 Gajeongbuk-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Seung-Mo Lee
- Department of Nanomechanics, Korea Institute of Machinery and Materials (KIMM), 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Republic of Korea; Nano Mechatronics, Korea University of Science and Technology (UST), 217 Gajeongbuk-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Wooyul Kim
- Department of Chemical and Biological Engineering College of Engineering, Sookmyung Women's University, Seoul, Republic of Korea.
| | - Dong Soo Hwang
- Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Chengam-ro, Nam-gu, Pohang 37673, Republic of Korea; Institute for Convergence Research and Education in Advanced Technology, Yonsei University International Campus I-CREATE, Incheon 21983, Republic of Korea.
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72
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Peng YH, Kashale AA, Lai Y, Hsu FC, Chen IWP. Exfoliation of 2D materials by saponin in water: Aerogel adsorption / photodegradation organic dye. CHEMOSPHERE 2021; 274:129795. [PMID: 33581393 DOI: 10.1016/j.chemosphere.2021.129795] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/30/2020] [Accepted: 01/23/2021] [Indexed: 06/12/2023]
Abstract
The biggest challenge for the paint industry is to clean the contaminated waste dye solution before it released into the water or to reuse it to create new paint and to protect the water from environmental pollution. Here in this work, exfoliating layered transition metal dichalcogenide materials prepare to the exfoliated 2D materials thin sheets in water with the assistance of natural saponin. Then, the three-dimensional (3D) MoS2-aerogel composite was synthesized by using greenway exfoliated two-dimensional (2D) MoS2 thin sheets to form MoS2-aerogel composite. The prepared 3D MoS2-aerogel composite demonstrates excellent 94% methylene blue (MB) dye adsorption ability over 5 min. Moreover, the adsorbed MB of the MoS2-aerogel shows ∼80% dye degradation activity in the presence of visible light. Therefore, these synthesized 3D MoS2-aerogel composite could be an excellent candidate for photocatalytic applications in the future.
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Affiliation(s)
- Yu-Hong Peng
- Department of Applied Science, National Taitung University, 369, Sec. 2, University Rd., Taitung City, 95092, Taiwan
| | - Anil A Kashale
- Department of Applied Science, National Taitung University, 369, Sec. 2, University Rd., Taitung City, 95092, Taiwan
| | - Yuekun Lai
- National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, PR China
| | - Fei-Chien Hsu
- Department of Applied Science, National Taitung University, 369, Sec. 2, University Rd., Taitung City, 95092, Taiwan
| | - I-Wen Peter Chen
- Department of Applied Science, National Taitung University, 369, Sec. 2, University Rd., Taitung City, 95092, Taiwan.
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73
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Li D, Cheng Y, Zuo H, Zhang W, Pan G, Fu Y, Wei Q. Dual-functional biocatalytic membrane containing laccase-embedded metal-organic frameworks for detection and degradation of phenolic pollutant. J Colloid Interface Sci 2021; 603:771-782. [PMID: 34229119 DOI: 10.1016/j.jcis.2021.06.155] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/17/2021] [Accepted: 06/27/2021] [Indexed: 11/25/2022]
Abstract
In this work, a metal-organic framework material, zeolitic imidazolate framework-90 (ZIF-90), was firstly used to encapsulate laccase (LAC) and to prepare ZIF-90/LAC biocomposites. Afterward, the composites were combined with bacterial cellulose (BC) and carboxylated multi-walled carbon nanotubes (c-MWCNTs) by a facile method to achieve a novel cellulose membrane with biocatalytic function, displaying excellent detection and degradation properties towards phenolic pollutant. Notably, the membrane was directly employed as a biosensor electrode, and it exhibited a linear response to catechol from 20 to 400 μM with a detection limit of 1.86 µM (S/N = 3), as well as satisfactory selectivity, reproducibility, and stability. In addition, the biocatalytic membrane showed higher degradation efficiency towards catechol than pure LAC, and the catechol degradation efficiency of the membrane generally ranged from 93.4% to 82.1% for five cycles. Moreover, the membrane was successfully applied in enzyme membrane reactor (EMR), achieving satisfactory results. The novel membrane harbors a broad application prospect in the fields of real-time monitor and treatment of phenolic wastewater.
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Affiliation(s)
- Dawei Li
- National and Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, School of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Yue Cheng
- National and Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, School of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Han Zuo
- National and Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, School of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Wei Zhang
- National and Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, School of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Gangwei Pan
- National and Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, School of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Yijun Fu
- National and Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, School of Textile and Clothing, Nantong University, Nantong 226019, China.
| | - Qufu Wei
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu Province 214122, PR China.
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Bicy K, Rouxel D, Poncot M, Royaud I, Bourson P, Chapron D, Kalarikkal N, Thomas S. Interfacial tuning and designer morphologies of microporous membranes based on polypropylene/natural rubber nanocomposites. J Appl Polym Sci 2021. [DOI: 10.1002/app.51208] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kottathodi Bicy
- International and Inter University Center for Nanoscience and Nanotechnology Mahatma Gandhi University Kottayam India
- Institut Jean Lamour Université de Lorraine Nancy France
| | - Didier Rouxel
- Institut Jean Lamour Université de Lorraine Nancy France
| | - Marc Poncot
- Institut Jean Lamour Université de Lorraine Nancy France
| | | | - Patrice Bourson
- LMOPS/Centrale Supelec EA 4423 Université de Lorraine Nancy France
| | - David Chapron
- LMOPS/Centrale Supelec EA 4423 Université de Lorraine Nancy France
| | - Nandakumar Kalarikkal
- International and Inter University Center for Nanoscience and Nanotechnology Mahatma Gandhi University Kottayam India
- School of Pure and Applied Physics Mahatma Gandhi University Kottayam India
| | - Sabu Thomas
- International and Inter University Center for Nanoscience and Nanotechnology Mahatma Gandhi University Kottayam India
- Institut Jean Lamour Université de Lorraine Nancy France
- School of Energy Materials Mahatma Gandhi University Kottayam India
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Fan W, Li Y, Wang C, Duan Y, Huo Y, Januszewski B, Sun M, Huo M, Elimelech M. Enhanced Photocatalytic Water Decontamination by Micro-Nano Bubbles: Measurements and Mechanisms. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:7025-7033. [PMID: 33944552 DOI: 10.1021/acs.est.0c08787] [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] [Indexed: 06/12/2023]
Abstract
Despite recent advancements in photocatalysis enabled by materials science innovations, the application of photocatalysts in water treatment is still hampered due to low overall efficiency. Herein, we present a TiO2 photocatalytic process with significantly enhanced efficiency by the introduction of micro-nano bubbles (MNBs). Notably, the removal rate of a model organic contaminant (methylene blue, MB) in an air MNB-assisted photocatalytic degradation (PCD) process was 41-141% higher than that obtained in conventional macrobubble (MaB)-assisted PCD under identical conditions. Experimental observations and supporting mechanistic modeling suggest that the enhanced photocatalytic degradation is attributed to the combined effects of increased dissolution of oxygen, improved colloidal stability and dispersion of the TiO2 nanocatalysts, and interfacial photoelectric effects of TiO2/MNB suspensions. The maximum dissolved oxygen (DO) concentration of the MNB suspension (i.e., 11.7 mg/L) was 32% higher than that of an MaB-aerated aqueous solution (i.e., 8.8 mg/L), thus accelerating the hole oxidation of H2O on TiO2. We further confirmed that the MNBs induced unique light-scattering effects, consequently increasing the optical path length in the TiO2/MNB suspension by 7.6%. A force balance model confirmed that a three-phase contact was formed on the surface of the bubble-TiO2 complex, which promoted high complex stability and PCD performance. Overall, this study demonstrates the enhanced photocatalytic water decontamination by MNBs and provides the underlying mechanisms for the process.
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Affiliation(s)
- Wei Fan
- School of Environment, Northeast Normal University, Changchun 130117, China
| | - Yuhang Li
- School of Environment, Northeast Normal University, Changchun 130117, China
| | - Chunliang Wang
- School of Physics, Northeast Normal University, Changchun 130024, China
| | - Yutong Duan
- School of Environment, Northeast Normal University, Changchun 130117, China
| | - Yang Huo
- School of Physics, Northeast Normal University, Changchun 130024, China
| | - Brielle Januszewski
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Meng Sun
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Mingxin Huo
- School of Environment, Northeast Normal University, Changchun 130117, China
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
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Fe-doped LaNi1-xFexO3 perovskite oxides for enhanced visible-light-driven photocatalytic activity. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122033] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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77
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Facile Synthesis of Flower-Like TiO2-Based Composite for Adsorption–Photocatalytic Degradation of High-Chroma Methylene Blue. Catalysts 2021. [DOI: 10.3390/catal11040515] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
A flower-like TiO2-based composite (denoted as Zn-Ti-6) was prepared using a flower-like zinc oxide template for adsorption–photocatalytic degradation of high-chroma methylene blue. The reaction took place in an alkaline environment following hydrochloric acid treatment to remove the template and form TiO2-based composite. Sodium hydroxide played both roles of morphology-directing agent and reactive etchant. The possible mechanism for the formation of flower-like Zn-Ti-6 was proposed. The adsorption and photocatalytic degradation behavior of Zn-Ti-6 on methylene blue (MB) removal was also investigated. The results revealed that Zn-Ti-6 showed better adsorption and photocatalytic degradation performance than TiO2 nanoparticles owing to its much larger specific surface area, more abundant hydroxyls, and lower photoluminescence intensity. The adsorption and photocatalytic degradation data of Zn-Ti-6 were well fitted to the pseudo-second-order and pseudo-first-order kinetics models, respectively. The excellent adsorption performance of Zn-Ti-6 is largely beneficial to the subsequent photocatalytic degradation performance for high-chroma wastewater treatment. Overall, this study contributes a facile fabrication strategy for flower-like TiO2-based composite to achieve the adsorption–photocatalytic degradation of high-chroma wastewater.
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78
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Wang T, Shi J, Liang Y, Han J, Tong Y, Li W. Novel SPVA/g-C 3N 4-SA/PAN Pervaporation Membranes with Porous Catalytic Layers for Esterification Enhancement. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c00451] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Taishan Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Jiayun Shi
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yao Liang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Jie Han
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yujia Tong
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Weixing Li
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
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79
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Li Y, Li H, Lu X, Yu X, Kong M, Duan X, Qin G, Zhao Y, Wang Z, Dionysiou DD. Molybdenum disulfide nanosheets vertically grown on self-supported titanium dioxide/nitrogen-doped carbon nanofiber film for effective hydrogen peroxide decomposition and "memory catalysis". J Colloid Interface Sci 2021; 596:384-395. [PMID: 33852982 DOI: 10.1016/j.jcis.2021.03.140] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/10/2021] [Accepted: 03/24/2021] [Indexed: 11/26/2022]
Abstract
A self-supporting catalyst consisting of 1D/2D vertical molybdenum disulfide@titanium dioxide/nitrogen-doped carbon nanofiber (MoS2@TiO2/NCNFs) was prepared and tested. It showed efficient hydrogen peroxide (H2O2) decomposition to generate hydroxyl radical (OH) and degradation of various pollutants under solar irradiation. The contribution of the increase in MoS2 edges for decomposing H2O2 was 0.0698 min-1. That is 9.83 times the rate of the original MoS2 edges resulting from the vertical structure. Specially, the catalyst degraded various aromatic pollutants even in the dark by releasing electrons stored in its graphite component to realize "memory catalysis". Also, it exhibited high degradation efficiency under outdoor solar irradiation. The catalyst was easily separated from the treated water, avoiding complex separation processes. All these features suggest this catalyst has great potential in practical water and sewage treatment applications.
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Affiliation(s)
- Yue Li
- Henan International Joint Laboratory of Rare Earth Composite Materials, School of Materials and Chemical Engineering, Henan University of Engineering, Xinzheng 451191, Henan, PR China; Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (ChEE), University of Cincinnati, Cincinnati, OH 45221-0012, United States
| | - Huimin Li
- Henan International Joint Laboratory of Rare Earth Composite Materials, School of Materials and Chemical Engineering, Henan University of Engineering, Xinzheng 451191, Henan, PR China; School of Material Science and Engineering, Henan Polytechnic University, Jiaozuo 454001, Henan, PR China
| | - Xiaolong Lu
- Henan International Joint Laboratory of Rare Earth Composite Materials, School of Materials and Chemical Engineering, Henan University of Engineering, Xinzheng 451191, Henan, PR China; School of Material Science and Engineering, Henan Polytechnic University, Jiaozuo 454001, Henan, PR China
| | - Xiang Yu
- Henan International Joint Laboratory of Rare Earth Composite Materials, School of Materials and Chemical Engineering, Henan University of Engineering, Xinzheng 451191, Henan, PR China
| | - Minghao Kong
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (ChEE), University of Cincinnati, Cincinnati, OH 45221-0012, United States
| | - Xiaodi Duan
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (ChEE), University of Cincinnati, Cincinnati, OH 45221-0012, United States
| | - Gang Qin
- School of Material Science and Engineering, Henan Polytechnic University, Jiaozuo 454001, Henan, PR China
| | - Yahao Zhao
- Henan International Joint Laboratory of Rare Earth Composite Materials, School of Materials and Chemical Engineering, Henan University of Engineering, Xinzheng 451191, Henan, PR China
| | - Zhenling Wang
- Henan International Joint Laboratory of Rare Earth Composite Materials, School of Materials and Chemical Engineering, Henan University of Engineering, Xinzheng 451191, Henan, PR China.
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (ChEE), University of Cincinnati, Cincinnati, OH 45221-0012, United States.
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80
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Ren Y, Ma Y, Min G, Zhang W, Lv L, Zhang W. A mini review of multifunctional ultrafiltration membranes for wastewater decontamination: Additional functions of adsorption and catalytic oxidation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 762:143083. [PMID: 33162134 DOI: 10.1016/j.scitotenv.2020.143083] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/29/2020] [Accepted: 10/12/2020] [Indexed: 05/25/2023]
Abstract
Multifunctional ultrafiltration membranes, which achieve ultrafiltration and additional functions in one unit, are a new strategy developed in recent years for wastewater treatment. In this mini review, we summarized and commented on the development of adsorptive and catalytically oxidative multifunctional ultrafiltration membranes, as well as pointed out possible further trends. The main methods for membrane preparation, i.e., blending, surface coating, reverse filtration, etc., were summarized, and the advantages and disadvantages of each method were discussed. In addition, the key criteria which influence the performance of membranes, including the efficiency of additional functions, original ultrafiltration, permeance, and stability, were analyzed. Furthermore, we introduced the applications of different classes of multifunctional ultrafiltration membranes, and tried to further analyzed some examples of multifunctional ultrafiltration membranes used for adsorption and catalytic oxidation. The most significant advantage of this technology is the high efficiency for the simultaneous removal of different kinds of pollutants or for the removal of one kind of pollutant during the deep treatment of multicomponent wastewater. However, some challenges still oppose the practical application of multifunctional ultrafiltration. We believe that breaking the trade-off between the high efficiency of additional functions and high flux, strengthening the stability of the membranes, achieving synergistic effects between multi-effect functions, and investigating the interaction mechanisms between active materials and the membrane are key points for further research.
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Affiliation(s)
- Yi Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Yulong Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Guangyu Min
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Wenbin Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Lu Lv
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China
| | - Weiming Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China; State Environmental Protection Engineering Center for Organic Chemical Wastewater Treatment and Resource Reuse, Nanjing 210046, China.
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81
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Wang K, He H, Zhang TC, Liang Y, Yuan S. Self-Locked and Self-Cleaning Membranes for Efficient Removal of Insoluble and Soluble Organic Pollutants from Water. ACS APPLIED MATERIALS & INTERFACES 2021; 13:6906-6918. [PMID: 33523643 DOI: 10.1021/acsami.0c21783] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A feasible and efficient membrane for long-term treatment of complex oily wastewater is especially in demand, but its development still remains a challenge because of serious membrane fouling and incomplete/destructive reclamation methods. Herein, an interpenetrating TiO2 nanorod-decorated membrane with self-locked and self-cleaning properties is rationally fabricated via coaxial electrospinning and hydrothermal synthesis. The self-locked membrane shows full reinstatement of the original state and exhibits satisfactory mechanical strength, superhydrophilicity, underwater superoleophobicity, and robust solvent resistance, which endow the membrane with successful separation for 16 types of highly emulsified oil-in-water emulsions (e.g., surfactant-free; anionic, cationic, and nonionic surfactant-stabilized). Moreover, successful sequencing treatment of soluble organic emulsions using the separated "bait-hook-destroy" strategy indicates that the pristine membrane can be used to treat multipollutant wastewater with various limits. Most importantly, the fouled membrane can easily be reinstated by light irradiation without reduction of both mechanical strength and separation performance. As a proof of concept, the as-synthesized membrane shows an ultrahigh flux over 5000 L m-2 h-1 with a removal efficiency of >99.92%. The present development would provide a highly efficient strategy for the fabrication of an inorganic-organic revivable electrospinning membrane for various applications.
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Affiliation(s)
- Kai Wang
- College of Architecture and Environmental Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Huaqiang He
- Low-carbon Technology & Chemical Reaction Engineering Lab, College of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Tian C Zhang
- Civil & Environmental Engineering Department, University of Nebraska-Lincoln, Omaha 68182-0178, Nebraska, United States
| | - Ying Liang
- College of Architecture and Environmental Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Shaojun Yuan
- Low-carbon Technology & Chemical Reaction Engineering Lab, College of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China
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82
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Bayantong ARB, Shih YJ, Dong CD, Garcia-Segura S, de Luna MDG. Nickel ferrite nanoenabled graphene oxide (NiFe 2O 4@GO) as photoactive nanocomposites for water treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:5472-5481. [PMID: 32964390 DOI: 10.1007/s11356-020-10545-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 08/16/2020] [Indexed: 06/11/2023]
Abstract
Nanocomposite materials can enhance the capabilities of water treatment processes such as photocatalysis. In this work, novel light-driven nanocatalysts were synthesized by using nickel ferrite (NiFe2O4) to nanoenable graphene oxide (GO) substrates. GO is an emerging 2D nanomaterial with high conductivity and adsorption properties. Moreover, the electric properties of GO improve photocatalytic performance by promoting charge carrier separation. Results of the characterization of the nickel ferrite nanoenabled graphene oxide (NiFe2O4@GO) nanocomposites demonstrate that homogeneous and stable photocatalysts were produced. The as-synthesized nanocatalysts enabled complete decolorization of the colored water matrix in short irradiation times of 150 min using minimal catalyst loading at 0.5 g L-1. The selective hook and destroy mechanism reduced the competitive effect of co-existing ions in solution. Furthermore, the use of specific scavengers helped to elucidate the degradation mechanisms of organic dye methylene blue by NiFe2O4@GO nanocomposites.
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Affiliation(s)
- Allen Rhay B Bayantong
- Environmental Engineering Program, National Graduate School of Engineering, University of the Philippines Diliman, 1101, Quezon City, Philippines
| | - Yu-Jen Shih
- Institute of Environmental Engineering, National Sun Yat-sen University, Kaohsiung City, 81157, Taiwan
| | - Cheng-Di Dong
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan.
| | - Sergi Garcia-Segura
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA
| | - Mark Daniel G de Luna
- Environmental Engineering Program, National Graduate School of Engineering, University of the Philippines Diliman, 1101, Quezon City, Philippines.
- Department of Chemical Engineering, University of the Philippines Diliman, 1101, Quezon City, Philippines.
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83
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Ren Y, Wang S, Zhang J, Lu J, Shan C, Zhang Y, Dionysiou DD, Lv L, Pan B, Zhang W. Enhancing the performance of Fenton-like oxidation by a dual-layer membrane: A sequential interception-oxidation process. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123766. [PMID: 33254778 DOI: 10.1016/j.jhazmat.2020.123766] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/06/2020] [Accepted: 08/17/2020] [Indexed: 06/12/2023]
Abstract
Fenton-like oxidation for multicomponent wastewater treatment suffers from a low efficiency due to non-selective nature of produced reactive species. In this study, a multifunctional dual-layer ultrafiltration membrane (Seq-ICM) was synthesized for multiple pollutants decontamination. Characterizations of the membranes indicate that Seq-ICM comprises a skin layer for ultrafiltration, and a porous support layer loaded with ∼50% MIL-53(Fe) for catalysis. With bovine serum albumin coexisting, Seq-ICM can remove 75.7% bisphenol S (BPS), which is much higher than that of a simultaneous interception-catalysis membrane (44.2 %). For multicomponent wastewater treatment, Seq-ICM system can save ∼59%-67% oxidant dosage as well compared with catalysis alone membrane system to achieve 50% BPS removal. Furthermore, the decontamination mechanisms were investigated to explain the advantages of Seq-ICM. Sequential interception and oxidation process by Seq-ICM leads to the interception of macromolecular substances first, following by catalytic oxidation of low-molecular-weight organics. This process prevents macromolecular substances from competing for active species with low-molecular-weight organics, thereby enhancing selectivity and oxidation efficiency. Meanwhile, Seq-ICM shows satisfactory BPS removal efficiency for treatment of 2865 L/m2 synthetic solution, as well as in real wastewater matrix. We believe the proposed technology based on a composite membrane is promising for the removal of multicomponent substances from wastewater.
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Affiliation(s)
- Yi Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Shu Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Jing Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Junhe Lu
- Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing, 210095, China
| | - Chao Shan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing, 210023, China
| | - Yanyang Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing, 210023, China
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH, 45221-0012, United States
| | - Lu Lv
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing, 210023, China
| | - Bingcai Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing, 210023, China
| | - Weiming Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing, 210023, China.
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84
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Niazi Z, Goharshadi EK, Mashreghi M, Jorabchi MN. Highly efficient solar photocatalytic degradation of a textile dye by TiO 2/graphene quantum dots nanocomposite. Photochem Photobiol Sci 2021; 20:87-99. [PMID: 33721238 DOI: 10.1007/s43630-020-00005-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 12/11/2020] [Indexed: 10/22/2022]
Abstract
Herein, two sunlight responsive photocatalysts including TiO2 nanoparticles (NPs) and TiO2/graphene quantum dots (GQDs) nanocomposite for degrading a textile dye, Reactive Black 5 (RB5), were prepared. The results showed that 100% of 50 ppm RB5 could be degraded by TiO2 NPs and TiO2/GQDs within 60 and 30 min sunlight irradiation, respectively. Hence, much better photocatalytic activity in degradation of RB5 was achieved by TiO2/GQDs under sunlight irradiation compared with pure TiO2 NPs due to its lower band gap (2.13 eV) and electron/hole recombination rate. The photocatalytic degradation mechanism of RB5 by TiO2 NPs was elucidated by adding some scavengers to the solution. The main reactive species contributing to RB5 degradation were surface hydroxyl radicals. The first-order solar degradation rate constant of RB5 for TiO2/GQDs is greater than that of TiO2 NPs under sunlight illumination.
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Affiliation(s)
- Zohreh Niazi
- Chemistry Department, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, 9177948974, Iran
| | - Elaheh K Goharshadi
- Chemistry Department, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, 9177948974, Iran. .,Nano Research Center, Ferdowsi University of Mashhad, Mashhad, 9177948974, Iran.
| | - Mansour Mashreghi
- Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, 9177948974, Iran
| | - Majid Namayandeh Jorabchi
- Chemistry Department, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, 9177948974, Iran.,Institute of Chemistry, Physical and Theoretical Chemistry, University of Rostock, Albert-Einstein-Straße 21, 18059, Rostock, Germany
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85
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Abstract
This review paper examines the current state-of-the-art in fabrication of aligned fibers via electrospinning techniques and the effects of these techniques on the mechanical and dielectric properties of electrospun fibers. Molecular orientation, system configuration to align fibers, and post-drawing treatment, like hot/cold drawing process, contribute to better specific strength and specific stiffness properties of nanofibers. The authors suggest that these improved, aligned nanofibers, when applied in composites, have better mechanical and dielectric properties for many structural and multifunctional applications, including advanced aerospace applications and energy storage devices. For these applications, most fiber alignment electrospinning research has focused on either mechanical property improvement or dielectric property improvement alone, but not both simultaneously. Relative to many other nanofiber formation techniques, the electrospinning technique exhibits superior nanofiber formation when considering cost and manufacturing complexity for many situations. Even though the dielectric property of pure nanofiber mat may not be of general interest, the analysis of the combined effect of mechanical and dielectric properties is relevant to the present analysis of improved and aligned nanofibers. A plethora of nanofibers, in particular, polyacrylonitrile (PAN) electrospun nanofibers, are discussed for their mechanical and dielectric properties. In addition, other types of electrospun nanofibers are explored for their mechanical and dielectric properties. An exploratory study by the author demonstrates the relationship between mechanical and dielectric properties for specimens obtained from a rotating mandrel horizontal setup.
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86
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Electrospun-based TiO2 nanofibers for organic pollutant photodegradation: a comprehensive review. REV CHEM ENG 2021. [DOI: 10.1515/revce-2020-0022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Abstract
Titanium dioxide (TiO2) is commonly used as a photocatalyst in the removal of organic pollutants. However, weaknesses of TiO2 such as fast charge recombination and low visible light usage limit its industrial application. Furthermore, photocatalysts that are lost during the treatment of pollutants create the problem of secondary pollutants. Electrospun-based TiO2 fiber is a promising alternative to immobilize TiO2 and to improve its performance in photodegradation. Some strategies have been employed in fabricating the photocatalytic fibers by producing hollow fibers, porous fibers, composite TiO2 with magnetic materials, graphene oxide, as well as doping TiO2 with metal. The modification of TiO2 can improve the absorption of TiO2 to the visible light area, act as an electron acceptor, provide large surface area, and promote the phase transformation of TiO2. The improvement of TiO2 properties can enhance carrier transfer rate which reduces the recombination and promotes the generation of radicals that potentially degrade organic pollutants. The recyclability of fibers, calcination effect, photocatalytic reactors used, operation parameters involved in photodegradation as well as the commercialization potential of TiO2 fibers are also discussed in this review.
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87
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Robust Z-scheme g-C3N4/WO3 heterojunction photocatalysts with morphology control of WO3 for efficient degradation of phenolic pollutants. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117693] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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88
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Azizi S, Alidadi H, Maaza M, Sarkhosh M. Degradation of Ofloxacin Using the UV/ZnO/Iodide Process in an Integrated Photocatalytic-Biological Reactor Containing Baffles. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c04431] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shohreh Azizi
- UNESCO-UNISA Africa Chair in Nanosciences and Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, P.O. Box 392, Pretoria 0002, South Africa
- Nanosciences African Network (NANOAFNET), iThemba LABS−National Research Foundation, 1 Old Faure Road, Somerset West 7129, P.O. Box 722, Somerset West, Western Cape 7131, South Africa
| | - Hossain Alidadi
- Social Determinants of Health Research Center, Mashhad University of Medical Sciences, Mashhad 9177948, Iran
| | - Malik Maaza
- UNESCO-UNISA Africa Chair in Nanosciences and Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, P.O. Box 392, Pretoria 0002, South Africa
- Nanosciences African Network (NANOAFNET), iThemba LABS−National Research Foundation, 1 Old Faure Road, Somerset West 7129, P.O. Box 722, Somerset West, Western Cape 7131, South Africa
| | - Maryam Sarkhosh
- Social Determinants of Health Research Center, Mashhad University of Medical Sciences, Mashhad 9177948, Iran
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89
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Ding D, Zhou L, Kang F, Yang S, Chen R, Cai T, Duan X, Wang S. Synergistic Adsorption and Oxidation of Ciprofloxacin by Biochar Derived from Metal-Enriched Phytoremediation Plants: Experimental and Computational Insights. ACS APPLIED MATERIALS & INTERFACES 2020; 12:53788-53798. [PMID: 33205958 DOI: 10.1021/acsami.0c15861] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Biochar is a promising candidate for the adsorptive removal of organic/inorganic pollutants, yet its role in metal-free catalyzed advanced oxidation processes still remains ambiguous. In this work, five biochar samples (PPBKx, where x represents the pyrolysis temperature) were prepared by using metal-enriched phytoremediation plant residue as the feedstock. Notably, PPBK exhibited a high specific surface area (as high as 1090.7 m2 g-1) and outstanding adsorption capacity toward ciprofloxacin (CIP, as much as 1.51 ± 0.19 mmol g-1). By introducing peroxymonosulfate (PMS, 5 mM) as the chemical oxidant, over 2 mmol g-1 CIP was synergistically adsorbed and oxidized within 30 min although PMS itself could not oxidize CIP efficiently, suggesting the formation of reactive oxidative species. Theoretical calculations revealed that PMS anions preferentially adsorbed on the activated C atoms adjacent to the graphitic N dopant, where the carbon matrix served as the electron donor, instead of as an electron mediator. The adsorbed PMS possessed a smaller molecular orbital energy gap, indicating that it was much easier to be activated than free PMS anions. Surface-bound reactive species were elucidated to be the dominant contributor through chemical quenching experiments and electrochemical characterizations. The catalytic activity of PPBK700 could be greatly retained in repeated oxidations because of the stable N species, which serve as the active catalytic sites, while the CIP adsorption was greatly deteriorated because of the diminishing active adsorption sites (carbon matrix edge) caused by the partial oxidation of PMS. This work not only provides a facile and low-cost approach for the synthesis of functional biochar toward environmental remediation but also deepens the understanding of biochar-catalyzed PMS activation and nonradical oxidation.
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Affiliation(s)
- Dahu Ding
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Liang Zhou
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Fuxing Kang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Shengjiong Yang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Rongzhi Chen
- College of Resources and Environment, University of Chinese Academic of Science, 19A, Yuquan Road, Beijing 100049, China
| | - Tianming Cai
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaoguang Duan
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide SA5005, Australia
| | - Shaobin Wang
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide SA5005, Australia
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90
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Liu J, Shen X, Zheng Z, Li M, Zhu X, Cao H, Cui C. Immobilization of laccase by 3D bioprinting and its application in the biodegradation of phenolic compounds. Int J Biol Macromol 2020; 164:518-525. [DOI: 10.1016/j.ijbiomac.2020.07.144] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/11/2020] [Accepted: 07/13/2020] [Indexed: 10/23/2022]
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91
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Cui J, Li F, Wang Y, Zhang Q, Ma W, Huang C. Electrospun nanofiber membranes for wastewater treatment applications. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117116] [Citation(s) in RCA: 170] [Impact Index Per Article: 42.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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92
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Zeitoun Z, El-Shazly AH, Nosier S, Elmarghany MR, Salem MS, Taha MM. Performance Evaluation and Kinetic Analysis of Photocatalytic Membrane Reactor in Wastewater Treatment. MEMBRANES 2020; 10:membranes10100276. [PMID: 33049928 PMCID: PMC7601555 DOI: 10.3390/membranes10100276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 10/04/2020] [Accepted: 10/06/2020] [Indexed: 11/30/2022]
Abstract
The objectives of the current study are to assess and compare the performance of a developed photocatalytic membrane reactor (PMR) in treating industrial waste (e.g., organic dye waste) against membrane distillation. The current PMR is composed of a feed tank, which is a continuous stirred photocatalytic reactor containing slurry Titanium dioxide (TiO2) particles that are activated by using ultraviolet lamp irradiation at a wavelength of 365 nm, and a poly-vinylidene flouride (PVDF) membrane cell. The experimental setup was designed in a flexible way to enable both separate and integrated investigations of the photocatalytic reactor and the membrane, separately and simultaneously. The experimental work was divided into two phases. Firstly, the PVDF membrane was fabricated and characterized to examine its morphology, surface charge, and hydrophobicity by using a scanning electron microscope, surface zeta potential, and contact angle tests, respectively. Secondly, the effects of using different concentrations of the TiO2 photocatalyst and feed (e.g., dye concentration) were examined. It is found that the PMR can achieve almost 100% dye removal and pure permeate is obtained at certain conditions. Additionally, a kinetic analysis was performed and revealed that the photocatalytic degradation of dye follows a pseudo-first-order reaction.
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Affiliation(s)
- Zeyad Zeitoun
- Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 11432, Egypt; (Z.Z.); (A.H.E.-S.); (S.N.)
| | - Ahmed H. El-Shazly
- Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 11432, Egypt; (Z.Z.); (A.H.E.-S.); (S.N.)
- Chemical and Petrochemical Engineering Department, Egypt-Japan University of Science and Technology (E-Just), New Borg El-Arab City, Alexandria 21934, Egypt
| | - Shaaban Nosier
- Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 11432, Egypt; (Z.Z.); (A.H.E.-S.); (S.N.)
| | - Mohamed R. Elmarghany
- Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt;
- Mansoura University Nanotechnology Center, Mansoura University, Mansoura 35516, Egypt
- Correspondence: (M.R.E.); (M.M.T.)
| | - Mohamed S. Salem
- Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt;
- Mansoura University Nanotechnology Center, Mansoura University, Mansoura 35516, Egypt
| | - Mahmoud M. Taha
- Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 11432, Egypt; (Z.Z.); (A.H.E.-S.); (S.N.)
- Environmental Engineering Department, University of Science and Technology, Zewail City of Science and Technology, October Gardens, Giza 12578, Egypt
- Correspondence: (M.R.E.); (M.M.T.)
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93
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Polymer-bixin nanofibers: A promising environmentally friendly material for the removal of dyes from water. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117118] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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94
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Application of PANI/TiO2 Composite for Photocatalytic Degradation of Contaminants from Aqueous Solution. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10196710] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Polyaniline (PANI) is a promising conducting polymer for surface modification of TiO2 to achieve extended photoresponse to visible light and increased photocatalytic efficiency. In this study, we report the synthesis of a PANI/TiO2 composite with different weight ratios of PANI, which was subsequently employed for photocatalytic degradation of methylene blue (MB), bisphenol A (BPA), and bacteriophage MS2 under visible-light irradiation. The functional groups, morphology, and light response of the composite were characterized by Fourier-transform infrared spectroscopy, field-emission transmission electron microscopy, and diffuse reflectance UV–visible spectroscopy, respectively. The PANI/TiO2 composite containing 4% by weight ratio of PANI was most suitable for MB degradation, and this photocatalyst was very stable even after repeated use (four cycles). The degradation of BPA and bacteriophage MS2 by PANI/TiO2 composite reached 80% in 360 min and 96.2% in 120 min, respectively, under visible-light irradiation. Therefore, the PANI/TiO2 composite with enhanced visible-light photocatalytic efficiency and stability can be widely used for the degradation of water contaminants.
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95
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García-Díaz E, Zhang D, Li Y, Verduzco R, Alvarez PJJ. TiO 2 microspheres with cross-linked cyclodextrin coating exhibit improved stability and sustained photocatalytic degradation of bisphenol A in secondary effluent. WATER RESEARCH 2020; 183:116095. [PMID: 32645579 DOI: 10.1016/j.watres.2020.116095] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 06/10/2020] [Accepted: 06/20/2020] [Indexed: 06/11/2023]
Abstract
Photocatalytic water treatment has significant potential to disinfect and degrade recalcitrant organic pollutants while minimizing the need to add chemicals, but current approaches have poor energy efficiency due, in part, to inefficient utilization of photo-generated reactive oxygen species (ROS). Organic coatings such as cyclodextrin (CD) can adsorb target contaminants and bring them close to the photocatalyst surface to enhance ROS utilization efficiency, but the coatings themselves are susceptible to ROS attack. Here, we report an ROS-resistant fluorinated CD polymer (CDP) that can both adsorb contaminants and resist degradation by ROS, yielding a more efficient material for "trap and zap" water treatment. We produced the CDP through condensation polymerization of β-cyclodextrin and tetrafluoroterephthalonitrile, resulting in a cross-linked, covalently bound CD film that is much more stable than prior approaches involving physi-sorption. We optimized the coating thickness on TiO2 microspheres to improve the efficiency of contaminant degradation, and found that increasing the CDP content enhanced BPA adsorption but also occluded photocatalytic sites and hindered photocatalytic degradation. The optimum content of CDP was 5% by weight, and this optimal CDP-TiO2 composition had a BPA adsorption capacity of 36.9 ± 1.0 mg g-1 compared with 24.1 ± 1.1 mg g-1 for CD-coated TiO2 (CD-TiO2) and 21.9 ± 1.5 mg g-1 for bare TiO2. CDP-TiO2 exhibited minimal photoactivity loss after 1000 h of repeated use in DI water under UVA irradiation (365 nm, 3.83 × 10-6 E L-1s-1), and no release of organic carbon from the coating was detected. Photocatalytic treatment using CDP-TiO2 only showed a small decrease in BPA removal efficiency in secondary effluent after four 3-h cycles, from 80.2% to 71.7%. In contrast, CD-TiO2 and P25 removed only 29.8% and 6.2% of BPA after 4 cycles, respectively. Altogether, the CDP-TiO2 microspheres represent promising materials for potential use in photocatalytic water treatment.
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Affiliation(s)
- Esmeralda García-Díaz
- Centre of Chemistry, Science Institute, Benemérita Universidad Autónoma de Puebla, Ciudad Universitaria, Edif. IC7, Puebla, Pue, 72570, Mexico
| | - Danning Zhang
- Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), United States; Department of Civil & Environmental Engineering, Houston, TX, 77005, United States
| | - Yilin Li
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX, 77005, United States
| | - Rafael Verduzco
- Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), United States; Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX, 77005, United States.
| | - Pedro J J Alvarez
- Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), United States; Department of Civil & Environmental Engineering, Houston, TX, 77005, United States.
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96
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Mei X, Bai J, Chen S, Zhou M, Jiang P, Zhou C, Fang F, Zhang Y, Li J, Long M, Zhou B. Efficient SO 2 Removal and Highly Synergistic H 2O 2 Production Based on a Novel Dual-Function Photoelectrocatalytic System. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:11515-11525. [PMID: 32786587 DOI: 10.1021/acs.est.0c00886] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The direct conversion of SO2 to SO3 is rather difficult for flue gas desulfurization due to its inert dynamic with high reaction activation energy, and the absorption by wet limestone-gypsum also needs the forced oxidation of O2 to oxidize sulfite to sulfate, which is necessary for additional aeration. Here, we propose a method to remove SO2 with highly synergistic H2O2 production based on a novel dual-function photoelectrocatalytic (PEC) system in which the jointed spontaneous reaction of desulfurization and H2O2 production was integrated instead of nonspontaneous reaction of O2 to H2O2. SO2 was absorbed by alkali liquor then oxidized quickly into SO42- by a nanorod α-Fe2O3 photoanode, which possessed high alkali corrosion resistance and electron transport properties. H2O2 was produced simultaneously in the cathode chamber on a gas diffusion electrode and was remarkably boosted by the conversion reaction of SO32- to SO42- in the anode chamber in which the released chemical energy was effectively used to increase H2O2. The photocurrent density increased by 40% up to 1.2 mA·cm-2, and the H2O2 evolution rate achieved 58.8 μmol·L-1·h-1·cm-2 with the synergistic treatment of SO2, which is about five times than that without SO2. This proposed PEC cell system offers a cost-effective and environmental-benign approach for dual purpose of flue gas desulfurization and simultaneous high-valued H2O2 production.
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Affiliation(s)
- Xiaojie Mei
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Jing Bai
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P.R. China
| | - Shuai Chen
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Mengyang Zhou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Panyu Jiang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Changhui Zhou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Fei Fang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Yan Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Jinhua Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Mingce Long
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Baoxue Zhou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P.R. China
- Key Laboratory of Thin Film and Microfabrication Technology, Ministry of Education, Shanghai 200240, PR China
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97
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Han Z, Deng Y, Fei J, Liu L, Liu J, Zhao J, Zhao X. Facile synthesis of amidoximated PAN fiber-supported TiO2 for visible light driven photocatalysis. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124947] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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98
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Zahra Z, Habib Z, Chung S, Badshah MA. Exposure Route of TiO 2 NPs from Industrial Applications to Wastewater Treatment and Their Impacts on the Agro-Environment. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1469. [PMID: 32727126 PMCID: PMC7466468 DOI: 10.3390/nano10081469] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/20/2020] [Accepted: 07/20/2020] [Indexed: 02/07/2023]
Abstract
The tremendous increase in the production and consumption of titanium dioxide (TiO2) nanoparticles (NPs) in numerous industrial products and applications has augmented the need to understand their role in wastewater treatment technologies. Likewise, the deleterious effects of wastewater on the environment and natural resources have compelled researchers to find out most suitable, economical and environment friendly approaches for its treatment. In this context, the use of TiO2 NPs as the representative of photocatalytic technology for industrial wastewater treatment is coming to the horizon. For centuries, the use of industrial wastewater to feed agriculture land has been a common practice across the globe and the sewage sludge generated from wastewater treatment plants is also used as fertilizer in agricultural soils. Therefore, it is necessary to be aware of possible exposure pathways of these NPs, especially in the perspective of wastewater treatment and their impacts on the agro-environment. This review highlights the potential exposure route of TiO2 NPs from industrial applications to wastewater treatment and its impacts on the agro-environment. Key elements of the review present the recent developments of TiO2 NPs in two main sectors including wastewater treatment and the agro-environment along with their potential exposure pathways. Furthermore, the direct exposure routes of these NPs from production to end-user consumption until their end phase needs to be studied in detail and optimization of their suitable applications and controlled use to ensure environmental safety.
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Affiliation(s)
- Zahra Zahra
- Department of Civil & Environmental Engineering, University of California-Irvine, Irvine, CA 92697, USA
| | - Zunaira Habib
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan;
| | - Sujin Chung
- Plamica Labs, Batten Hall, 125 Western Ave, Allston, MA 02163, USA;
| | - Mohsin Ali Badshah
- Department of Chemical and Biomolecular Engineering, University of California-Irvine, Irvine, CA 92697, USA;
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99
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Bi-Polymer Electrospun Nanofibers Embedding Ag3PO4/P25 Composite for Efficient Photocatalytic Degradation and Anti-Microbial Activity. Catalysts 2020. [DOI: 10.3390/catal10070784] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Using a bi-polymer system comprising of transparent poly(methyl methacrylate) (PMMA) and poly(vinyl pyrrolidone) (PVP), a visible light active Ag3PO4/P25 composite was immobilized into the mats of polymeric electrospun nanofibers. After nanofibers synthesis, sacrificial PVP was removed, leaving behind rough surface nanofibers with easy access to Ag3PO4/P25 composite. The remarkable photocatalytic efficiency was attained using a PMMA and Ag3PO4/P25 weight ratio of 1:0.6. Methyl orange (MO) was used to visualize pollutant removal and exhibited stable removal kinetics up to five consecutive cycles under simulated daylight. Also, these polymeric nanofibers (NFs) revealed an important role in the destruction of microorganisms (E. coli), signifying their potential in water purification. A thin film fibrous mat was also used in a small bench scale plug flow reactor (PFR) for polishing of synthetic secondary effluent and the effects of inorganic salts were studied upon photocatalytic degradation in terms of total organic carbon (TOC) and turbidity removal. Lower flow rate (5 mL/h) resulted in maximum TOC and turbidity removal rates of 86% and 50%, respectively. Accordingly, effective Ag3PO4/P25 immobilization into an ideal support material and selectivity towards target pollutants could both enhance the efficiency of photocatalytic process under solar radiations without massive energy input.
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100
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de Luna MDG, Garcia-Segura S, Mercado CH, Lin YT, Lu MC. Doping TiO 2 with CuSO 4 enhances visible light photocatalytic activity for organic pollutant degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:24604-24613. [PMID: 31273664 DOI: 10.1007/s11356-019-05789-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 06/18/2019] [Indexed: 06/09/2023]
Abstract
Photocatalysis is one of the most promising advanced oxidation processes due to the capability of solid catalyst to continuously produce oxidant species under light irradiation. The use of conventional UV lamps is high cost intensive, which undermines the possible implementation in developing countries. Visible light active photocatalysts can overcome these challenges and find a market opportunity for competitive technology implementation. This work proposes the synthesis of visible light active catalyst following a facile sol-gel synthesis that introduces CuSO4 as dopant in TiO2. Results present complete abatement of methylene blue in 120 min of treatment under 50 mW cm-2 of blue light (λ = 450 nm), while commercial P25 TiO2 presented null abatement under identical conditions. Synthesis parameters including dopant level and calcination temperature allowed defining optimum synthesis conditions based on material characteristics modification and catalytic activity enhancement. A doping level of 0.21 mol% CuSO4 was identified as optimum condition to enable visible light photocatalysis of doped TiO2 catalysts calcined at 300 °C. Finally, operational parameters were evaluated defining a wide range of pH operation under 3.0 g L-1 of catalyst dose to treat up to 20 g L-1 of highly recalcitrant phenothiazine dye. These optimum conditions allowed complete dye removal under visible light after 120 min of treatment.
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Affiliation(s)
- Mark Daniel G de Luna
- Department of Chemical Engineering, College of Engineering, University of the Philippines, 1101 Diliman, Quezon City, Philippines
- Environmental Engineering Program, National Graduate School of Engineering, University of the Philippines, 1101 Diliman, Quezon City, Philippines
| | - Sergi Garcia-Segura
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA
| | - Chinee H Mercado
- Environmental Engineering Program, National Graduate School of Engineering, University of the Philippines, 1101 Diliman, Quezon City, Philippines
| | - Yao-Tung Lin
- Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung, 402, Taiwan
| | - Ming-Chun Lu
- Department of Environmental Resources Management, Chia Nan University of Pharmacy and Science, Tainan, 71710, Taiwan.
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