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Noornama, Abidin MNZ, Abu Bakar NK, Hashim NA. Innovative solutions for the removal of emerging microplastics from water by utilizing advanced techniques. MARINE POLLUTION BULLETIN 2024; 206:116752. [PMID: 39053257 DOI: 10.1016/j.marpolbul.2024.116752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 06/13/2024] [Accepted: 07/17/2024] [Indexed: 07/27/2024]
Abstract
Microplastic pollution is one of the most pressing global environmental problems due to its harmful effects on living organisms and ecosystems. To address this issue, researchers have explored several techniques to successfully eliminate microplastics from water sources. Chemical coagulation, electrocoagulation, magnetic extraction, adsorption, photocatalytic degradation, and biodegradation are some of the recognized techniques used for the removal of microplastics from water. In addition, membrane-based techniques encompass processes propelled by pressure or potential, along with sophisticated membrane technologies like the dynamic membrane and the membrane bioreactor. Recently, researchers have been developing advanced membranes composed of metal-organic frameworks, MXene, zeolites, carbon nanomaterials, metals, and metal oxides to remove microplastics. This paper aims to analyze the effectiveness, advantages, and drawbacks of each method to provide insights into their application for reducing microplastic pollution.
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Affiliation(s)
- Noornama
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia; Department of Chemistry, Faculty of Science, Balochistan University of Information Technology, Engineering and Management Sciences, Quetta, Pakistan
| | | | - Nor Kartini Abu Bakar
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Nur Awanis Hashim
- Department of Chemical Engineering, Faculty of Engineering, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
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Xing W, Wang Y, Mao X, Gao Z, Yan X, Yuan Y, Huang L, Tang J. Improvement strategies for oil/water separation based on electrospun SiO 2 nanofibers. J Colloid Interface Sci 2024; 653:1600-1619. [PMID: 37812837 DOI: 10.1016/j.jcis.2023.09.196] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 08/07/2023] [Accepted: 09/30/2023] [Indexed: 10/11/2023]
Abstract
Oil spills and oily effluents from industry and daily life pose a great threat to all organisms in the ecosystem, while aggravating the problem of water scarcity, which has developed into a global challenge. Therefore, the development of advanced materials and technologies for oil/water separation has become a focus of attention. One-dimensional (1D) SiO2 nanofibers (SNFs) have become one of the most widely used inorganic nanomaterials in the past due to their stable chemical properties, excellent biocompatibility, and high temperature resistance etc. Meanwhile, electrospinning technique, as an emerging technology for treating oil/water emulsions, electrospun SNFs on this basis also has a number of advantages such as adjustable wettability, diverse structure and good connectivity. This review provides a systematic overview of the research progress of electrospun SNFs in different aspects. In this review, we first introduce the basic principles of electrospun SNFs, then focus on the design structures of various SNFs, propose corresponding strategies for the property improvement of SNFs, also analyze and consider the applications of SNFs. Finally, the challenges faced by electrospun SNFs in the field of oil/water separation are analyzed, and the future directions of electrospun SNFs are summarized and prospected.
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Affiliation(s)
- Wei Xing
- Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Yanxin Wang
- Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
| | - Xinhui Mao
- Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Zhiyuan Gao
- Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Xianhang Yan
- Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Yanru Yuan
- Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Linjun Huang
- Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
| | - Jianguo Tang
- Institute of Hybrid Materials, National Center of International Research for Hybrid Materials Technology, National Base of International Science & Technology Cooperation, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
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Sharma I, Kaur J, Poonia G, Mehta SK, Kataria R. Nanoscale designing of metal organic framework moieties as efficient tools for environmental decontamination. NANOSCALE ADVANCES 2023; 5:3782-3802. [PMID: 37496632 PMCID: PMC10368002 DOI: 10.1039/d3na00169e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 06/12/2023] [Indexed: 07/28/2023]
Abstract
Environmental pollutants, being a major and detrimental component of the ecological imbalance, need to be controlled. Serious health issues can get intensified due to contaminants present in the air, water, and soil. Accurate and rapid monitoring of environmental pollutants is imperative for the detoxification of the environment and hence living beings. Metal-organic frameworks (MOFs) are a class of porous and highly diverse adsorbent materials with tunable surface area and diverse functionality. Similarly, the conversion of MOFs into nanoscale regime leads to the formation of nanometal-organic frameworks (NMOFs) with increased selectivity, sensitivity, detection ability, and portability. The present review majorly focuses on a variety of synthetic methods including the ex situ and in situ synthesis of MOF nanocomposites and direct synthesis of NMOFs. Furthermore, a variety of applications such as nanoabsorbent, nanocatalysts, and nanosensors for different dyes, antibiotics, toxic ions, gases, pesticides, etc., are described along with illustrations. An initiative is depicted hereby using nanostructures of MOFs to decontaminate hazardous environmental toxicants.
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Affiliation(s)
- Indu Sharma
- Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University Chandigarh-160 014 India
| | - Jaspreet Kaur
- School of Basic Sciences, Indian Institute of Information Technology (IIIT) Una-177 209 India
| | - Gargi Poonia
- Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University Chandigarh-160 014 India
| | - Surinder Kumar Mehta
- Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University Chandigarh-160 014 India
| | - Ramesh Kataria
- Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University Chandigarh-160 014 India
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Non-Solvent- and Temperature-Induced Phase Separations of Polylaurolactam Solutions in Benzyl Alcohol as Methods for Producing Microfiltration Membranes. COLLOIDS AND INTERFACES 2023. [DOI: 10.3390/colloids7010010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The possibility of obtaining porous films through solutions of polylaurolactam (PA12) in benzyl alcohol (BA) was considered. The theoretical calculation of the phase diagram showed the presence of the upper critical solution temperature (UCST) for the PA12/BA system at 157 °C. The PA12 completely dissolved in BA at higher temperatures, but the resulting solutions underwent phase separation upon cooling down to 120–140 °C because of the PA12’s crystallization. The viscosity of the 10–40% PA12 solutions increased according to a power law but remained low and did not exceed 5 Pa·s at 160 °C. Regardless of the concentration, PA12 formed a dispersed phase when its solutions were cooled, which did not allow for the obtention of strong films. On the contrary, the phase separation of the 20–30% PA12 solutions under the action of a non-solvent (isopropanol) leads to the formation of flexible microporous films. The measurement of the porosity, wettability, strength, permeability, and rejection of submicron particles showed the best results for a porous film produced from a 30% solution by non-solvent-induced phase separation. This process makes it possible to obtain a membrane material with a 240 nm particle rejection of 99.6% and a permeate flow of 1.5 kg/m2hbar for contaminated water and 69.9 kg/m2hbar for pure water.
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Liu C, Wang S, Wang N, Yu J, Liu YT, Ding B. From 1D Nanofibers to 3D Nanofibrous Aerogels: A Marvellous Evolution of Electrospun SiO 2 Nanofibers for Emerging Applications. NANO-MICRO LETTERS 2022; 14:194. [PMID: 36161372 PMCID: PMC9511469 DOI: 10.1007/s40820-022-00937-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 08/17/2022] [Indexed: 05/14/2023]
Abstract
One-dimensional (1D) SiO2 nanofibers (SNFs), one of the most popular inorganic nanomaterials, have aroused widespread attention because of their excellent chemical stability, as well as unique optical and thermal characteristics. Electrospinning is a straightforward and versatile method to prepare 1D SNFs with programmable structures, manageable dimensions, and modifiable properties, which hold great potential in many cutting-edge applications including aerospace, nanodevice, and energy. In this review, substantial advances in the structural design, controllable synthesis, and multifunctional applications of electrospun SNFs are highlighted. We begin with a brief introduction to the fundamental principles, available raw materials, and typical apparatus of electrospun SNFs. We then discuss the strategies for preparing SNFs with diverse structures in detail, especially stressing the newly emerging three-dimensional SiO2 nanofibrous aerogels. We continue with focus on major breakthroughs about brittleness-to-flexibility transition of SNFs and the means to achieve their mechanical reinforcement. In addition, we showcase recent applications enabled by electrospun SNFs, with particular emphasis on physical protection, health care and water treatment. In the end, we summarize this review and provide some perspectives on the future development direction of electrospun SNFs.
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Affiliation(s)
- Cheng Liu
- Innovation Center for Textile Science and Technology, College of Textiles, Donghua University, Shanghai, 201620, People's Republic of China
| | - Sai Wang
- Innovation Center for Textile Science and Technology, College of Textiles, Donghua University, Shanghai, 201620, People's Republic of China
| | - Ni Wang
- Innovation Center for Textile Science and Technology, College of Textiles, Donghua University, Shanghai, 201620, People's Republic of China
| | - Jianyong Yu
- Innovation Center for Textile Science and Technology, College of Textiles, Donghua University, Shanghai, 201620, People's Republic of China.
| | - Yi-Tao Liu
- Innovation Center for Textile Science and Technology, College of Textiles, Donghua University, Shanghai, 201620, People's Republic of China
| | - Bin Ding
- Innovation Center for Textile Science and Technology, College of Textiles, Donghua University, Shanghai, 201620, People's Republic of China.
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Zhu Q, Yang Y, Gao H, Xu LP, Wang S. Bioinspired superwettable electrodes towards electrochemical biosensing. Chem Sci 2022; 13:5069-5084. [PMID: 35655548 PMCID: PMC9093108 DOI: 10.1039/d2sc00614f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 03/22/2022] [Indexed: 11/30/2022] Open
Abstract
Superwettable materials have attracted much attention due to their fascinating properties and great promise in several fields. Recently, superwettable materials have injected new vitality into electrochemical biosensors. Superwettable electrodes exhibit unique advantages, including large electrochemical active areas, electrochemical dynamics acceleration, and optimized management of mass transfer. In this review, the electrochemical reaction process at electrode/electrolyte interfaces and some fundamental understanding of superwettable materials are discussed. Then progress in different electrodes has been summarized, including superhydrophilic, superhydrophobic, superaerophilic, superaerophobic, and superwettable micropatterned electrodes, electrodes with switchable wettabilities, and electrodes with Janus wettabilities. Moreover, we also discussed the development of superwettable materials for wearable electrochemical sensors. Finally, our perspective for future research is presented.
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Affiliation(s)
- Qinglin Zhu
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing Beijing 100083 P. R. China
| | - Yuemeng Yang
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing Beijing 100083 P. R. China
| | - Hongxiao Gao
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing Beijing 100083 P. R. China
| | - Li-Ping Xu
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing Beijing 100083 P. R. China
| | - Shutao Wang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences Beijing 100190 China
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Li X, Zhang Y, Zhang L, Xia S, Zhao Y, Yan J, Yu J, Ding B. Synthesizing Superior Flexible Oxide Perovskite Ceramic Nanofibers by Precisely Controlling Crystal Nucleation and Growth. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2106500. [PMID: 35199487 DOI: 10.1002/smll.202106500] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Indexed: 05/27/2023]
Abstract
Oxide perovskite ceramics are cornerstone materials of electronic devices, but they easily break under bending. Such brittle failure phenomenon limits their applications in emerging flexible electronics. Here, the authors propose a scalable approach of sol-gel electrospinning to synthesize flexible perovskite Li0.35 La0.55 TiO3 (LLTO) nanofibers (NFs) by reducing grain sizes and pore defects in the NFs. The strategy is to precisely control crystal nucleation and growth by forming homogeneous nuclei in the sol before electrospinning and to construct soft twin and amorphous grain boundaries by controlling calcination temperatures. Ball-milling the sol promotes the formation of numerous LLTO nuclei and thus effectively refines grains, while using gradient calcination temperatures from 200 to 900 °C creates intricate soft grain boundaries. The individual LLTO NF shows ceramic toughness with an elastic modulus of ≈40 GPa and the NF film demonstrates silk-like softness with a large elastic strain of 1.51%. Moreover, the LLTO film shows superior fatigue resistance and it maintains structure well after repeated tensile-buckling cycles at 40% strain. The proposed strategy facilitates to develop flexible oxide perovskite ceramic films with appealing applications.
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Affiliation(s)
- Xiaohan Li
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
| | - Yuanyuan Zhang
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
| | - Liang Zhang
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
| | - Shuhui Xia
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
| | - Yun Zhao
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
| | - Jianhua Yan
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 200051, China
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, 201620, China
| | - Jianyong Yu
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 200051, China
| | - Bin Ding
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 200051, China
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, 201620, China
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Siriwardane I, Sandaruwan C, de Silva RM, Williams GR, Gurgul SJ, Dziemidowicz K, de Silva KMN. Nanomagnetite- and Nanotitania-Incorporated Polyacrylonitrile Nanofibers for Simultaneous Cd(II)- and As(V)-Ion Removal Applications. ACS OMEGA 2021; 6:28171-28181. [PMID: 34723015 PMCID: PMC8552354 DOI: 10.1021/acsomega.1c04238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Accepted: 09/29/2021] [Indexed: 06/13/2023]
Abstract
This work reports the fabrication of nanomagnetite- and nanotitania-incorporated polyacrylonitrile nanofibers (MTPANs) by an electrospinning process, which has the potential to be used as a membrane material for the selective removal of Cd(II) and As(V) in water. The fiber morphology was characterized by scanning electron microscopy (SEM). The incorporation of nanomagnetite and nanotitania in the composite fiber matrix was confirmed by energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectroscopy. The fibers doped with nanomagnetite and nanotitania (MPAN and TPAN fibers, respectively), as well as MTPAN and neat polycrylonitrile (PAN) fibers, after thermally stabilizing at 275 °C in air, were assessed for their comparative As(V)- and Cd(II)-ion removal capacities. The isotherm studies indicated that the highest adsorption of Cd(II) was shown by MTPAN, following the Langmuir model with a q m of 51.5 mg/m2. On the other hand, MPAN showed the highest As(V)adsorption capacity, following the Freundlich model with a K F of 0.49. The mechanism of adsorption of both Cd(II) and As(V) by fibers was found to be electrostatically driven, which was confirmed by correlating the point of zero charges (PZC) exhibited by fibers with the pH of maximum ion adsorptions. The As(V) adsorption on MPAN occurs by an inner-sphere mechanism, whereas Cd(II) adsorption on MTPAN is via both surface complexation and an As(V)-assisted inner-sphere mechanism. Even though the presence of coexistent cations, Ca(II) and Mg(II), has been shown to affect the Cd(II) removal by MTPAN, the MTPAN structure shows >50% removal efficiency even for minute concentrations (0.5 ppm) of Cd(II) in the presence of high common ion concentrations (10 ppm). Therefore, the novel polyacrylonitrile-based nanofiber material has the potential to be used in polymeric filter materials used in water purification to remove As(V) and Cd(II) simultaneously.
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Affiliation(s)
- Induni
W. Siriwardane
- Centre
for Advanced Materials and Devices (CAMD), Department of Chemistry, University of Colombo, Colombo 00300, Sri Lanka
- Sri
Lanka Institute of Nanotechnology (SLINTEC), Nanotechnology and Science
Park, Mahenwatte, Pitipana, Homagama 10200, Sri Lanka
| | - Chanaka Sandaruwan
- Sri
Lanka Institute of Nanotechnology (SLINTEC), Nanotechnology and Science
Park, Mahenwatte, Pitipana, Homagama 10200, Sri Lanka
| | - Rohini M. de Silva
- Centre
for Advanced Materials and Devices (CAMD), Department of Chemistry, University of Colombo, Colombo 00300, Sri Lanka
| | - Gareth R. Williams
- UCL
School of Pharmacy, University College London, 29−39 Brunswick Square, London WC1N 1AX, United Kingdom
| | - Sebastian J. Gurgul
- UCL
School of Pharmacy, University College London, 29−39 Brunswick Square, London WC1N 1AX, United Kingdom
| | - Karolina Dziemidowicz
- UCL
School of Pharmacy, University College London, 29−39 Brunswick Square, London WC1N 1AX, United Kingdom
| | - K. M. Nalin de Silva
- Centre
for Advanced Materials and Devices (CAMD), Department of Chemistry, University of Colombo, Colombo 00300, Sri Lanka
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Ge JC, Wu G, Yoon SK, Kim MS, Choi NJ. Study on the Preparation and Lipophilic Properties of Polyvinyl Alcohol (PVA) Nanofiber Membranes via Green Electrospinning. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2514. [PMID: 34684954 PMCID: PMC8541033 DOI: 10.3390/nano11102514] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/17/2021] [Accepted: 09/24/2021] [Indexed: 01/27/2023]
Abstract
As an environmentally friendly water-soluble polymer, polyvinyl alcohol (PVA) has attracted extensive attention because of its non-toxic, degradable, low cost, and good biocompatibility. Electrospinning is a kind of nanotechnology, and the nanofiber membrane prepared by it has the advantages of large surface area-to-volume ratios, nano- to micron-sized fibers, etc. Herein, a simple and facile one-step green electrospinning method was developed to fabricate various environmentally friendly PVA nanofiber membranes. The lipophilic properties of PVA membranes were investigated and optimized according different PVA concentrations. The PVA electrospun fiber prepared from the solution at a concentration of 10 wt% had the highest adsorption capacity for the adsorption of new and waste engine oils, and the waste engine oil adsorption capacity (12.70 g/g) was higher than that of new engine oil (11.67 g/g). It also has a relatively large BET surface area (12.05 m2/g), a pore volume (0.04 cm3/g), and an appropriate pore diameter (13.69 nm) and fiber diameter (174.21 nm). All electrospun PVA membranes showed excellent lipophilic properties due to their oil contact angles of much less than 30°. Therefore, PVA electrospun fibrous membranes have great application potential in the field of purifying engine oil due to the excellent lipophilic properties and oil absorption capacity.
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Affiliation(s)
| | | | - Sam Ki Yoon
- Division of Mechanical Design Engineering, Jeonbuk National University, Jeonju-si 54896, Korea; (J.C.G.); (G.W.)
| | - Min Soo Kim
- Division of Mechanical Design Engineering, Jeonbuk National University, Jeonju-si 54896, Korea; (J.C.G.); (G.W.)
| | - Nag Jung Choi
- Division of Mechanical Design Engineering, Jeonbuk National University, Jeonju-si 54896, Korea; (J.C.G.); (G.W.)
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Escribá A, Thome Da Silva BAT, Lourenço SA, Cava CE. Incorporation of nanomaterials on the electrospun membrane process with potential use in water treatment. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126775] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Design of a novel PEBA/CDs polymeric fibrous composite nanostructure in order to remove navicula algal and improve the quality of drinking water. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03852-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Kotobuki M, Gu Q, Zhang L, Wang J. Ceramic-Polymer Composite Membranes for Water and Wastewater Treatment: Bridging the Big Gap between Ceramics and Polymers. Molecules 2021; 26:3331. [PMID: 34206052 PMCID: PMC8198361 DOI: 10.3390/molecules26113331] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 05/25/2021] [Accepted: 05/30/2021] [Indexed: 11/25/2022] Open
Abstract
Clean water supply is an essential element for the entire sustainable human society, and the economic and technology development. Membrane filtration for water and wastewater treatments is the premier choice due to its high energy efficiency and effectiveness, where the separation is performed by passing water molecules through purposely tuned pores of membranes selectively without phase change and additional chemicals. Ceramics and polymers are two main candidate materials for membranes, where the majority has been made of polymeric materials, due to the low cost, easy processing, and tunability in pore configurations. In contrast, ceramic membranes have much better performance, extra-long service life, mechanical robustness, and high thermal and chemical stabilities, and they have also been applied in gas, petrochemical, food-beverage, and pharmaceutical industries, where most of polymeric membranes cannot perform properly. However, one of the main drawbacks of ceramic membranes is the high manufacturing cost, which is about three to five times higher than that of common polymeric types. To fill the large gap between the competing ceramic and polymeric membranes, one apparent solution is to develop a ceramic-polymer composite type. Indeed, the properly engineered ceramic-polymer composite membranes are able to integrate the advantages of both ceramic and polymeric materials together, providing improvement in membrane performance for efficient separation, raised life span and additional functionalities. In this overview, we first thoroughly examine three types of ceramic-polymer composite membranes, (i) ceramics in polymer membranes (nanocomposite membranes), (ii) thin film nanocomposite (TFN) membranes, and (iii) ceramic-supported polymer membranes. In the past decade, great progress has been made in improving the compatibility between ceramics and polymers, while the synergy between them has been among the main pursuits, especially in the development of the high performing nanocomposite membranes for water and wastewater treatment at lowered manufacturing cost. By looking into strategies to improve the compatibility among ceramic and polymeric components, we will conclude with briefing on the perspectives and challenges for the future development of the composite membranes.
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Affiliation(s)
| | | | | | - John Wang
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, Singapore; (M.K.); (Q.G.); (L.Z.)
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Lin Y, Zhang Z, Ren Z, Yang Y, Guo Z. A solvent-responsive robust superwetting titanium dioxide-based metal rubber for oil-water separation and dye degradation. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126179] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Abstract
Titanium dioxide (TiO2) is widely used in various fields both in daily life and industry owing to its excellent photoelectric properties and its induced superwettability. Over the past several decades, various methods have been reported to improve the wettability of TiO2 and plenty of practical applications have been developed. The TiO2-derived materials with different morphologies display a variety of functions including photocatalysis, self-cleaning, oil-water separation, etc. Herein, various functions and applications of TiO2 with superwettability are summarized and described in different sections. First, a brief introduction about the discovery of photoelectrodes made of TiO2 is revealed. The ultra-fast spreading behaviors on TiO2 are shown in the part of ultra-fast spreading with superwettability. The part of controllable wettability introduces the controllable wettability of TiO2-derived materials and their related applications. Recent developments of interfacial photocatalysis and photoelectrochemical reactions with TiO2 are presented in the part of interfacial photocatalysis and photoelectrochemical reactions. The part of nanochannels for ion rectification describes ion transportation in nanochannels based on TiO2-derived materials. In the final section, a brief conclusion and a future outlook based on the superwettability of TiO2 are shown.
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He Y, Wang Z, Wang H, Wang Z, Zeng G, Xu P, Huang D, Chen M, Song B, Qin H, Zhao Y. Metal-organic framework-derived nanomaterials in environment related fields: Fundamentals, properties and applications. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213618] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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16
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Kim Y, Eom HH, Kim D, Harbottle D, Lee JW. Adsorptive removal of cesium by electrospun nanofibers embedded with potassium copper hexacyanoferrate. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117745] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Li J, Wu M, Du H, Wang B, Li Y, Huan W. Highly effective catalytic reduction of nitrobenzene compounds with gold nanoparticle-immobilized hydroxyapatite nanowire-sintered porous ceramic beads. NEW J CHEM 2021. [DOI: 10.1039/d0nj06209j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A catalytic ceramic bead with micron-sized and interconnected porous channels, adjustable porosity, high catalytic activity, and long-term stability is prepared.
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Affiliation(s)
- Jie Li
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass
- Zhejiang A & F University
- Lin’an 311300
- China
| | - Minjie Wu
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass
- Zhejiang A & F University
- Lin’an 311300
- China
| | - Hongchen Du
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization
- Weifang University of Science and Technology
- Weifang 262700
- China
| | - Buchuan Wang
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass
- Zhejiang A & F University
- Lin’an 311300
- China
| | - Yinglong Li
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass
- Zhejiang A & F University
- Lin’an 311300
- China
| | - Weiwei Huan
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass
- Zhejiang A & F University
- Lin’an 311300
- China
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18
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Zeb S, Ali N, Ali Z, Bilal M, Adalat B, Hussain S, Gul S, Ali F, Ahmad R, khan S, Iqbal HM. Silica-based nanomaterials as designer adsorbents to mitigate emerging organic contaminants from water matrices. JOURNAL OF WATER PROCESS ENGINEERING 2020. [DOI: 10.1016/j.jwpe.2020.101675] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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19
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Kang Y, Jiao S, Wang B, Lv X, Wang W, Yin W, Zhang Z, Zhang Q, Tan Y, Pang G. PVDF-Modified TiO 2 Nanowires Membrane with Underliquid Dual Superlyophobic Property for Switchable Separation of Oil-Water Emulsions. ACS APPLIED MATERIALS & INTERFACES 2020; 12:40925-40936. [PMID: 32805857 DOI: 10.1021/acsami.0c11266] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Separation membranes with underliquid dual superlyophobicity have recently caused widespread concern due to their switchable separation of oil-water mixtures and emulsions. However, the fabrication of the reported underliquid dual superlyophobic membranes is difficult, and the design of the underliquid dual superlyophobic surface of these membranes is challenging because of their complex surface composition. Theoretically, underliquid dual superlyophobicity is an underliquid Cassie state attainable by the synergy of the underliquid dual lyophobic surface and the construction of a high-roughness surface. Herein, we fabricated an underliquid dual superlyophobic membrane by combining underliquid dual lyophobic polyvinylidene fluoride (PVDF) and TiO2 nanowires. PVDF-modified TiO2 nanowire membranes with underliquid dual superlyophobicity were prepared via a simple adsorption and filtration approach. PVDF was coated onto TiO2 nanowires to form a PVDF layer with a thickness of 6 nm. The PVDF modification provided flexibility to the fragile TiO2 nanowires membrane and changed its wettability from underwater superoleophobicity/underoil superhydrophilicity to underliquid dual superlyophobicity. The PVDF-modified TiO2 nanowires membrane efficiently separated both oil-in-water and water-in-oil emulsions. The binary cooperative effect between the TiO2 nanowires and the coated PVDF layer was responsible for the underliquid dual superlyophobicity.
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Affiliation(s)
- Yutang Kang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Shihui Jiao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Boran Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Xinyan Lv
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Wenwen Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Wen Yin
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Zhenwei Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Qi Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Yumei Tan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Guangsheng Pang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
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20
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Electrochemical Response of Highly Porous Percolative CGO Electrospun Membranes. Catalysts 2020. [DOI: 10.3390/catal10070756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Electrochemical Impedance Spectroscopy (EIS) is here used to characterize highly porous Ce0.9Gd0.1O1.95 (CGO, ca. 90% vol. of porosity) free-supporting nano-fibrous thick (100μm) membranes, fabricated via an electrospinning technique. The investigation of the calcination temperature influence on the microstructure indicates an evolution of the single nanofiber’s microstructure with a gradual grain growth from densely packed polycrystalline to pearl collar-like structures at increasing temperatures. This evolution is accompanied by brittleness for samples treated at temperatures above 800 °C. The electrochemical characterization suggests an ionic percolative conductivity that exploits both the bulk-lattice conduction along the individual nanofibers and interfacial conduction across different nanofibers at their intersections. Optimized membranes treated at 600 and 700 °C exhibit a similar electrochemical bulk response, but different interfacial electrochemical behavior (low frequency) associated with a grain size effect.
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21
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Sato T, Mori S, Septiyanti M, Nakamura H, Hongo C, Matsumoto T, Nishino T. Preparation and characterization of cellulose nanofiber cryogels as oil absorbents and enzymatic lipolysis scaffolds. Carbohydr Res 2020; 493:108020. [PMID: 32407824 DOI: 10.1016/j.carres.2020.108020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/27/2020] [Accepted: 04/24/2020] [Indexed: 12/26/2022]
Abstract
Cellulose nanofiber (CNF) materials have received much attention as sustainable "green" materials with high mechanical properties. Their application in oil absorption and enzymatic lipolysis makes them further attractive from the perspective of environmental issues including marine pollution preservation. Herein, we prepared CNF cryogels with various surface properties, evaluated their capacities as oil absorbents and applied them as lipase-lipolysis scaffolds. Their obtained cryogels consisted of various modified CNFs and their structure and properties were investigated. Moreover, lipase-supported CNF cryogels were prepared for enzymatic lipolysis. The cryogels of protonated TEMPO-oxidized CNF showed the highest absorption capacity for olive oil, while all the CNF cryogels possessed similar absorption abilities towards water. In enzymatic lipolysis with lipase, the TEMPO-oxidized CNF (TOCN-Na+) cryogel showed the highest specific activity. The specific activities of lipase in TOCN-Na+ cryogels remained unchanged after being stored at 40 °C for 3 days.
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Affiliation(s)
- Tatsuya Sato
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Rokko, Nada-ku, Kobe, 657-8501, Japan
| | - Shunichi Mori
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Rokko, Nada-ku, Kobe, 657-8501, Japan
| | - Melati Septiyanti
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Rokko, Nada-ku, Kobe, 657-8501, Japan
| | - Hiroyuki Nakamura
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Rokko, Nada-ku, Kobe, 657-8501, Japan
| | - Chizuru Hongo
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Rokko, Nada-ku, Kobe, 657-8501, Japan
| | - Takuya Matsumoto
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Rokko, Nada-ku, Kobe, 657-8501, Japan
| | - Takashi Nishino
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Rokko, Nada-ku, Kobe, 657-8501, Japan.
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22
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Ikram M, Hassan J, Raza A, Haider A, Naz S, Ul-Hamid A, Haider J, Shahzadi I, Qamar U, Ali S. Photocatalytic and bactericidal properties and molecular docking analysis of TiO2 nanoparticles conjugated with Zr for environmental remediation. RSC Adv 2020; 10:30007-30024. [PMID: 35518250 PMCID: PMC9056309 DOI: 10.1039/d0ra05862a] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 08/07/2020] [Indexed: 01/04/2023] Open
Abstract
Despite implementing several methodologies including a combination of physical, chemical and biological techniques, aquatic and microbial pollution remains a challenge to this day. Recently, nanomaterials have attracted considerable attention due to their extraordinary prospective for utilization toward environmental remediation. Among several probable candidates, TiO2 stands out due to its potential for use in multifaceted applications. One way to improve the catalytic and antimicrobial potential of TiO2 is to dope it with certain elements. In this study, Zr-doped TiO2 was synthesized through a sol–gel chemical method using various dopant concentrations (2, 4, 6, and 8 wt%). Surface morphological, microstructural and elemental analysis was carried out using FESEM and HR-TEM along with EDS to confirm the formation of Zr–TiO2. XRD spectra showed a linear shift of the (101) anatase peak to lower diffraction angles (from 25.4° to 25.08°) with increasing Zr4+ concentration. Functional groups were examined via FTIR, an ample absorption band appearing between 400 and 700 cm−1 in the acquired spectrum was attributed to the vibration modes of the Ti–O–Ti linkage present within TiO2 nanoparticles, which denotes the formation of TiO2. Experimental results indicated that with increasing dopant concentrations, photocatalytic potential was enhanced significantly. In this respect, TiO2 doped with 8 wt% Zr (sample 0.08 : 1) exhibited outstanding performance by realizing 98% elimination of synthetic MB in 100 minutes. This is thought to be due to a decreased rate of electron–hole pair recombination that transpires upon doping. Therefore, it is proposed that Zr-doped TiO2 can be used as an effective photocatalyst material for various environmental and wastewater treatment applications. The good docking scores and binding confirmation of Zr-doped TiO2 suggested doped nanoparticles as a potential inhibitor against selected targets of both E. coli and S. aureus. Hence, enzyme inhibition studies of Zr-doped TiO2 NPs are suggested for further confirmation of these in silico predictions. Despite implementing several methodologies including a combination of physical, chemical and biological techniques, aquatic and microbial pollution remains a challenge to this day.![]()
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Affiliation(s)
- M. Ikram
- Solar Cell Applications Research Lab
- Department of Physics
- Government College University Lahore
- Pakistan
| | - J. Hassan
- Department of Physics
- Riphah Institute of Computing and Applied Sciences (RICAS)
- Riphah International University
- Lahore
- Pakistan
| | - A. Raza
- Department of Physics
- Riphah Institute of Computing and Applied Sciences (RICAS)
- Riphah International University
- Lahore
- Pakistan
| | - A. Haider
- Department of Clinical Medicine and Surgery
- University of Veterinary and Animal Sciences
- Lahore 54000
- Pakistan
| | - S. Naz
- Tianjin Institute of Industrial Biotechnology
- Chinese Academy of Sciences
- Tianjin 300308
- China
| | - A. Ul-Hamid
- Center for Engineering Research
- Research Institute
- King Fahd University of Petroleum & Minerals
- Dhahran
- Saudi Arabia
| | - J. Haider
- Tianjin Institute of Industrial Biotechnology
- Chinese Academy of Sciences
- Tianjin 300308
- China
| | - I. Shahzadi
- College of Pharmacy
- University of the Punjab
- Lahore
- Pakistan
| | - U. Qamar
- Department of Physics
- Riphah Institute of Computing and Applied Sciences (RICAS)
- Riphah International University
- Lahore
- Pakistan
| | - S. Ali
- Department of Physics
- Riphah Institute of Computing and Applied Sciences (RICAS)
- Riphah International University
- Lahore
- Pakistan
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23
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Wang B, Wang Q, Wang Y, Di J, Miao S, Yu J. Flexible Multifunctional Porous Nanofibrous Membranes for High-Efficiency Air Filtration. ACS APPLIED MATERIALS & INTERFACES 2019; 11:43409-43415. [PMID: 31659893 DOI: 10.1021/acsami.9b17205] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Particulate matter (PM) discharged along with the rapid industrialization and urbanization hazardously threatens ecosystems and human health. Membrane-based filtration technology has been proved to be an effective approach to capture PM from the polluted air. However, the fabrication of filtration membranes with excellent reusability and antibacterial activity has rarely been reported. Herein, the flexible multifunctional porous nanofibrous membranes were fabricated by embedding Ag nanoparticles into the electrospun porous SiO2-TiO2 nanofibers via an impregnation method, which integrated the abilities of PM filtration and antibacterial performance. Compared with the reported air filters, the resultant membrane (Ag@STPNM) with high surface polarity and porous structure possessed the low density, high removal efficiency, and small pressure drop. For instance, the removal efficiency and the pressure drop of Ag@STPNM with a basis weight of only 3.9 g m-2 for PM2.5 reached 98.84% and 59 Pa, respectively. In terms of the excellent thermal stability of Ag@STPNM, the adsorbed PM could be removed simply by a calcination process. The filtration performance of Ag@STPNM kept stable during five purification-regeneration cycles and the long-time filtration for 12 h, exhibiting excellent recyclability and durability. Furthermore, the embedded Ag nanoparticles could achieve the effective resistance to the breeding of bacteria on Ag@STPNM, giving the bacteriostatic rate of 95.8%. Therefore, Ag@STPNM holds promising potentials as a highly efficient, reusable, and antibacterial air filter in the practical purification of the indoor environment or personal air.
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Affiliation(s)
| | | | - Yang Wang
- Department of Mechanical Engineering , City University of Hong Kong , 83th Tat Chee Avenue , Kowloon , Hong Kong , P. R. China
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24
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Affiliation(s)
- Chao Huang
- Department of Materials, Loughborough University, Loughborough, UK
| | - Noreen L. Thomas
- Department of Materials, Loughborough University, Loughborough, UK
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25
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Shan H, Dong X, Cheng X, Si Y, Yu J, Ding B. Highly flexible, mesoporous structured, and metallic Cu-doped C/SiO 2 nanofibrous membranes for efficient catalytic oxidative elimination of antibiotic pollutants. NANOSCALE 2019; 11:14844-14856. [PMID: 31355834 DOI: 10.1039/c9nr04118d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The development of inorganic membranous catalysts with both large mesopores and superb flexibility is extremely favorable for the enhancement of their catalytic oxidation activity for the degradation of antibiotic pollutants in wastewater via sulfate radical-based advanced oxidation processes; however, there still exists a huge challenge for inorganic materials to simultaneously realize these two properties. Herein, metallic copper-doped carbon/silica nanofibrous membranes (Cu@C/SiO2 NFMs) with large mesopores, superb flexibility, and robust mechanical strength were fabricated through a sol-gel electrospinning and subsequent in situ carbonization reduction method. The synthesized Cu nanoparticles were homogeneously distributed throughout the mesoporous C/SiO2 nanofiber matrix, which enabled the resultant Cu@C/SiO2 NFMs to be applied as heterogeneous catalysts, and their catalytic performance was systematically assessed through activating persulfate for the elimination of tetracycline hydrochloride (TCH) in water. The fabricated Cu@C/SiO2 NFMs provided outstanding catalytic performance towards TCH with a high removal efficiency of 95% in 40 min and a rapid removal speed of 0.054 min-1. Moreover, the membranes could be facilely recycled through being directly separated from water without any post-processing. Such a facile strategy for preparing mesoporous and flexible metal-doped inorganic nanofibrous membranes may offer novel insights for designing new types of heterogeneous catalysts for antibiotic-containing wastewater treatment or other potential applications.
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Affiliation(s)
- Haoru Shan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai 201620, China.
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26
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Wu XQ, Shao ZD, Liu Q, Xie Z, Zhao F, Zheng YM. Flexible and porous TiO 2/SiO 2/carbon composite electrospun nanofiber mat with enhanced interfacial charge separation for photocatalytic degradation of organic pollutants in water. J Colloid Interface Sci 2019; 553:156-166. [PMID: 31202052 DOI: 10.1016/j.jcis.2019.06.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 05/08/2019] [Accepted: 06/06/2019] [Indexed: 12/20/2022]
Abstract
Semiconductor photocatalysis has long been considered as a promising approach for remediation of polluted water. However, the high recombination rate of electrons and holes, as well as a low reaction rate, have impeded its large-scale applications. Therefore, it is of great importance to develop appropriate photocatalysts for promoting its practical application. In this study, a novel TiO2/SiO2/carbon electrospun nanofiber mat (TSC NFM) with flexibility and porous hierarchy has been successfully designed and fabricated by a facile method of electrospinning and carbonization. Characterization results show that the TSC NFM consists of closely-packed and well-distributed anatase (TiO2) nanocrystals, amorphous SiO2 nanoparticles, and carbon with interconnected meso- and macro-pores. The photocatalytic performance of the TSC NFM was evaluated by degrading rhodamine B and 4-nitrophenol in batch systems. The results show that TSC NFM exhibits a higher photocatalytic activity than TiO2/SiO2 nanofiber mat, which does not contain carbon. The enhanced performance of the TSC NFM can be attributed to the improved adsorption capacity toward the organic pollutants due to the presence of carbon and to the enhanced interfacial charge separation between TiO2 nanoparticles and carbon. Besides, the as-prepared TSC NFM displays good stability and reusability. Notably, the flexible TSC NFM can be used in a continuous-flow reactor to efficiently treat wastewater. Our work provides new insights into the fabrication of carbon-based inorganic nanofiber mats, which have great potential in water treatment.
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Affiliation(s)
- Xiao-Qiong Wu
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; CAS Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China; CSIRO Manufacturing, Private Bag 10, Clayton, Victoria 3168, Australia
| | - Zai-Dong Shao
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; CAS Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Qing Liu
- Fujian Provincial Key Laboratory of Ecology-Toxicological Effects & Control for Emerging Contaminants, College of Environmental and Biological Engineering, Putian University, 1133 Xueyuan Road, Putian 351100, China
| | - Zongli Xie
- CSIRO Manufacturing, Private Bag 10, Clayton, Victoria 3168, Australia
| | - Fei Zhao
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China
| | - Yu-Ming Zheng
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; CAS Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China.
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27
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Abstract
Electrospinning is a versatile and viable technique for generating ultrathin fibers. Remarkable progress has been made with regard to the development of electrospinning methods and engineering of electrospun nanofibers to suit or enable various applications. We aim to provide a comprehensive overview of electrospinning, including the principle, methods, materials, and applications. We begin with a brief introduction to the early history of electrospinning, followed by discussion of its principle and typical apparatus. We then discuss its renaissance over the past two decades as a powerful technology for the production of nanofibers with diversified compositions, structures, and properties. Afterward, we discuss the applications of electrospun nanofibers, including their use as "smart" mats, filtration membranes, catalytic supports, energy harvesting/conversion/storage components, and photonic and electronic devices, as well as biomedical scaffolds. We highlight the most relevant and recent advances related to the applications of electrospun nanofibers by focusing on the most representative examples. We also offer perspectives on the challenges, opportunities, and new directions for future development. At the end, we discuss approaches to the scale-up production of electrospun nanofibers and briefly discuss various types of commercial products based on electrospun nanofibers that have found widespread use in our everyday life.
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Affiliation(s)
- Jiajia Xue
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
| | - Tong Wu
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
| | - Yunqian Dai
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu 211189, People’s Republic of China
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
- School of Chemistry and Biochemistry, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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28
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A general strategy to fabricate soft magnetic CuFe2O4@SiO2 nanofibrous membranes as efficient and recyclable Fenton-like catalysts. J Colloid Interface Sci 2019; 538:620-629. [DOI: 10.1016/j.jcis.2018.12.028] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 12/04/2018] [Accepted: 12/07/2018] [Indexed: 01/22/2023]
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29
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Qu R, Liu Y, Zhang W, Li X, Feng L, Jiang L. Aminoazobenzene@Ag modified meshes with large extent photo-response: towards reversible oil/water removal from oil/water mixtures. Chem Sci 2019; 10:4089-4096. [PMID: 31049191 PMCID: PMC6469292 DOI: 10.1039/c9sc00020h] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 02/23/2019] [Indexed: 01/15/2023] Open
Abstract
A large-extent photo-responsive wettability transformation is realized by aminoazobenzene@Ag to selectively remove oil/water.
Photo-responsive materials with superwetting properties, especially in the azo-based class, have been used in water treatment because of their smart performance on wettability changes. However, their transformation extent in wettability has always troubled researchers. Here, we modified nano-Ag pine needles and aminoazobenzene (AABN) on polydopamine (PDA) pre-treated porous meshes, realizing a large-extent reversible photo-responsive wettability transformation from highly hydrophobic to highly hydrophilic. The contact angle is about 150.0° after being exposed to visible light, and is about 10.0° under 365 nm UV light. Accordingly, the modified mesh can achieve photo-responsive removal between oil and water from oil/water mixtures. This facile and universal approach based on trans–cis isomerization of AABN could be endowed to various commercial conductive meshes. Moreover, the modified meshes exhibit satisfactory removal efficiency, reusability and physical/chemical stability, which are more promising for practical applications such as fuel recycling, remote controlled oil/water separation and astronautical resource regeneration.
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Affiliation(s)
- Ruixiang Qu
- Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China .
| | - Yanan Liu
- Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China .
| | - Weifeng Zhang
- Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China .
| | - Xiangyu Li
- Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China .
| | - Lin Feng
- Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China .
| | - Lei Jiang
- Key Laboratory of Bio-inspired Smart Interface Sciences , Technical Institute of Physics and Chemistry , Chinese Academy of Sciences , Beijing , 100084 , P. R. China
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Wang Y, Wang B, Wang Q, Di J, Miao S, Yu J. Amino-Functionalized Porous Nanofibrous Membranes for Simultaneous Removal of Oil and Heavy-Metal Ions from Wastewater. ACS APPLIED MATERIALS & INTERFACES 2019; 11:1672-1679. [PMID: 30540435 DOI: 10.1021/acsami.8b18066] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Both oil spill and heavy-metal ions in the industrial wastewater cause severe problems for aquatic ecosystem and human health. In the present work, the electrospun superamphiphilic SiO2-TiO2 porous nanofibrous membranes (STPNMs) comprised of intrafiber mesopores and interfiber macropores are modified by an amino-silanization reaction, which affords the membrane (ASTPNMs) the ability to simultaneously remove the oil contaminants and the water-soluble heavy-metal ions from wastewater. The underwater superoleophobicity of ASTPNMs facilitates the highly efficient separation of water and various oils, even emulsifier-stabilized emulsion. Meanwhile, an optimal modification time (15 min, ASTPNM-15) is important for maintaining the under-oil superhydrophilicity of the membrane, based on which the oil contaminant in membrane can be easily cleaned by water alone, showing excellent self-cleaning performance. The adsorption of Pb2+ over ASTPNM-15 reaches equilibrium at around 20 min, and the monolayer adsorption capacity is 142.86 mg g-1 at pH = 5 at 20 °C. In the breakthrough processes, the permeation volume of ASTPNM-15 for the purification of Pb2+ (5 ppm, pH = 5) reaches 160 mL when the concentration of Pb2+ in the filtrate increases to 0.05 ppm. The separation efficiencies of ASTPNM-15 for simulated wastewater containing both oil spill and various heavy-metal ions (Pb2+, Cr3+, Ni2+) are larger than 99.5%. In addition, the separation capacity keeps stable over five purification-regeneration cycles without obvious decrease, proving excellent recyclability and reusability of ASTPNM-15 for practical applications.
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31
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Yihan S, Mingming L, Guo Z. Ag nanoparticles loading of polypyrrole-coated superwetting mesh for on-demand separation of oil-water mixtures and catalytic reduction of aromatic dyes. J Colloid Interface Sci 2018; 527:187-194. [DOI: 10.1016/j.jcis.2018.05.048] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 05/18/2018] [Accepted: 05/18/2018] [Indexed: 12/13/2022]
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32
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Ghaffar A, Zhang L, Zhu X, Chen B. Porous PVdF/GO Nanofibrous Membranes for Selective Separation and Recycling of Charged Organic Dyes from Water. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:4265-4274. [PMID: 29490141 DOI: 10.1021/acs.est.7b06081] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Graphene oxide (GO) membranes are robust and continue to attract great attention due to their fascinating properties, despite their potential issues regarding stability and selectivity in aqueous-phase processing. That being said, however, the functional moieties of GO could be used for membrane surface modification, while ensuring simultaneous removal and recycling of industrial organic dyes. Herein, we present a versatile porous structured polyvinylidene fluoride-graphene oxide (PVdF-GO) nanofibrous membranes (NFMs), prepared by using simple and straightforward electrospinning approach for selective separation and filtration. The GO nanosheets were distributed homogeneously throughout the PVdF nanofiber, regulating the surface morphology and performance of PVdF-GO NFM. The PVdF-GO NFMs possesses high mechanical strength and surface free energy (SFE), consequently resulting high permeation and filtration efficiency as compared to PVdF NFM. The selectivity (99%) toward positively charged dyes based on electrostatic attraction, while maintaining rejection (100%) for negatively charged dye from mixed solutions highlight the role of GO in PVdF-GO NFM, owing to uniform pores and negatively charged surface. In addition, the actual efficiency of NFMs could be recovered easily up to three consecutive filtration cycles by regeneration, thereby assuring high stability. The high permeation, purification and filtration efficiency, good stability and recycling of PVdF-GO NFMs are promising for use in practical water purification and applications, particularly for selective filtration and recycling of dyes.
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Affiliation(s)
- Abdul Ghaffar
- Department of Environmental Science , Zhejiang University , Hangzhou , Zhejiang 310058 , China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058 , China
| | - Lina Zhang
- Department of Environmental Science , Zhejiang University , Hangzhou , Zhejiang 310058 , China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058 , China
| | - Xiaoying Zhu
- Department of Environmental Science , Zhejiang University , Hangzhou , Zhejiang 310058 , China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058 , China
| | - Baoliang Chen
- Department of Environmental Science , Zhejiang University , Hangzhou , Zhejiang 310058 , China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058 , China
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Zhou P, Li J, Yang W, Zhu L, Tang H. Polyaniline Nanofibers: Their Amphiphilicity and Uses for Pickering Emulsions and On-Demand Emulsion Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:2841-2848. [PMID: 29406720 DOI: 10.1021/acs.langmuir.7b04353] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The wetting property of nanomaterials is of great importance to both fundamental understanding and potential applications. However, the study on the intrinsic wetting property of nanomaterials is interfered by organic capping agents, which are often used to lower the surface energy of nanomaterials and avoid their irreversible agglomeration. In this work, the wetting property of the nanostructured polyaniline that requires no organic capping agents is investigated. Compared to hydrophilic granular particulates, polyaniline nanofibers are amphiphilic and have an excellent capability of creating Pickering emulsions at a wide range of pH. It is suggested that polyaniline nanofibers can be easily wetted by water and oil. Furthermore, the amphiphilic polyaniline nanofibers as building blocks can be used to construct filtration membranes with a small pore size. The wetting layer of the continuous phase of emulsions in the porous nanochannels efficiently prevents the permeation of the dispersed phase, realizing high-efficiency on-demand emulsion separation.
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Affiliation(s)
- Ping Zhou
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, College of Resources and Environmental Science, South-Central University for Nationalities , 182 Minyuan Road, Wuhan 430074, People's Republic of China
| | - Jing Li
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , 18 Tianshui Middle Road, Lanzhou 730000, People's Republic of China
| | - Wenwen Yang
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, College of Resources and Environmental Science, South-Central University for Nationalities , 182 Minyuan Road, Wuhan 430074, People's Republic of China
| | - Lihua Zhu
- College of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Heqing Tang
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, College of Resources and Environmental Science, South-Central University for Nationalities , 182 Minyuan Road, Wuhan 430074, People's Republic of China
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Facile fabrication of flexible SiO2/PANI nanofibers for ammonia gas sensing at room temperature. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.10.065] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Infused-liquid-switchable porous nanofibrous membranes for multiphase liquid separation. Nat Commun 2017; 8:575. [PMID: 28924164 PMCID: PMC5603539 DOI: 10.1038/s41467-017-00474-y] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 06/30/2017] [Indexed: 11/25/2022] Open
Abstract
Materials with selective wettabilities are widely used for effective liquid separation in environmental protection and the chemical industry. Current liquid separation strategies are primarily based on covalent modification to control the membranes’ surface energy, or are based on gating mechanisms to accurately tune the gating threshold of the transport substance. Herein, we demonstrate a simple and universal polarity-based protocol to regulate the wetting behavior of superamphiphilic porous nanofibrous membranes by infusing a high polar component of surface energy liquid into the membranes, forming a relatively stable liquid-infusion-interface to repel the immiscible low polar component of surface energy liquid. Even immiscible liquids with a surface energy difference as small as 2 mJ m−2, or emulsions stabilized by emulsifiers can be effectively separated. Furthermore, the infused liquid can be substituted by another immiscible liquid with a higher polar component of surface energy, affording successive separation of multiphase liquids. Separating immiscible liquids with small surface energy differences remains a challenge. Here, the authors develop a polarity-based strategy for the separation of multiphase mixtures of immiscible liquids, even those with surface energy differences as small as 2 mJ m-2.
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Li L, Zhang J, Wang A. Removal of Organic Pollutants from Water Using Superwetting Materials. CHEM REC 2017; 18:118-136. [DOI: 10.1002/tcr.201700029] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Lingxiao Li
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Tianshui Middle Road 18 Lanzhou 730000 P. R. China
- University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Junping Zhang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Tianshui Middle Road 18 Lanzhou 730000 P. R. China
| | - Aiqin Wang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Tianshui Middle Road 18 Lanzhou 730000 P. R. China
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Xu Z, Li X, Teng K, Zhou B, Ma M, Shan M, Jiao K, Qian X, Fan J. High flux and rejection of hierarchical composite membranes based on carbon nanotube network and ultrathin electrospun nanofibrous layer for dye removal. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2017.04.029] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Shan H, Wang X, Shi F, Yan J, Yu J, Ding B. Hierarchical Porous Structured SiO 2/SnO 2 Nanofibrous Membrane with Superb Flexibility for Molecular Filtration. ACS APPLIED MATERIALS & INTERFACES 2017; 9:18966-18976. [PMID: 28509531 DOI: 10.1021/acsami.7b04518] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The separation and purification of chemical molecules from organic media under harsh chemical environments are of vital importance in the fields of water treatment, biomedical engineering, and organic recycling. Herein, we report the preparation of a flexible SiO2/SnO2 nanofibrous membrane (SiO2/SnO2 NFM) with high surface area and hierarchical porous structure by selecting poly(vinyl butyral) as pore-forming agent and embedding crystalline phase into amorphous matrix without using surfactant as sacrificial template. Benefiting from the uniform micropore size on the fibers and negatively charged properties, the membranes exhibit a precise selectivity toward molecules based on electrostatic interaction and size exclusion, which could separate organic molecule mixtures with the same electrostatic charges and different molecular sizes with a high efficiency of more than 97%. Furthermore, the highly tortuous open-porous structures and high porosity give rise to a high permeate flux of 288 000 L m-2 h-1. In addition, the membrane also displays excellent stability and can be reused for ten consecutive filtration-regeneration cycles. The integration of high filtration efficiency, large permeate flux, good reutilization, and easy to industrialization provides the SiO2/SnO2 NFM for potential applications in practical molecular purification and separation science.
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Affiliation(s)
- Haoru Shan
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University , Shanghai 201620, China
| | - Xueqin Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University , Shanghai 201620, China
| | - Feihao Shi
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , Shanghai 201620, China
| | - Jianhua Yan
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University , Shanghai 201620, China
- Nanofibers Research Center, Modern Textile Institute, Donghua University , Shanghai 201620, China
| | - Jianyong Yu
- Nanofibers Research Center, Modern Textile Institute, Donghua University , Shanghai 201620, China
| | - Bin Ding
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University , Shanghai 201620, China
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University , Shanghai 201620, China
- Nanofibers Research Center, Modern Textile Institute, Donghua University , Shanghai 201620, China
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Song J, Wang X, Yan J, Yu J, Sun G, Ding B. Soft Zr-doped TiO 2 Nanofibrous Membranes with Enhanced Photocatalytic Activity for Water Purification. Sci Rep 2017; 7:1636. [PMID: 28487571 PMCID: PMC5431652 DOI: 10.1038/s41598-017-01969-w] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 04/03/2017] [Indexed: 11/09/2022] Open
Abstract
Self-standing photocatalytic membranes constructed from TiO2 nanofibers hold great promise in environmental remediation; however, challenges still remained for the poor mechanical properties of polycrystalline TiO2 nanofibers. Herein, soft Zr-doped TiO2 (TZ) nanofibrous membranes with robust mechanical properties and enhanced photocatalytic activity were fabricated via electrospinning technique. The Zr4+ incorporation could effectively inhibit the grain growth and reduce the surface defects and breaking point of TiO2 nanofiber. The as-prepared TZ membranes were composed of well-interconnected nanofibers with a high aspect ratios, small grain size and pore size, which exhibited good tensile strength (1.32 MPa) and showed no obvious damage after 200 cycles of bending to a radius of 2 mm. A plausible bending deformation mechanism of the soft TZ membranes was proposed from microscopic single nanofiber to macroscopical membranes. Moreover, the resultant TZ membranes displayed better photocatalytic performance for methylene blue degradation compared to a commercial catalyst (P25), including high degradation degree of 95.4% within 30 min, good reusability in 5 cycles, and easiness of recycling. The successful preparation of such fascinating materials may open up new avenues for the design and development of soft TiO2-based membranes for various application.
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Affiliation(s)
- Jun Song
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Xueqin Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Jianhua Yan
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China.,Nanofibers Research Center, Modern Textile Institute, Donghua University, Shanghai, 200051, China
| | - Jianyong Yu
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China.,Nanofibers Research Center, Modern Textile Institute, Donghua University, Shanghai, 200051, China
| | - Gang Sun
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
| | - Bin Ding
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China. .,Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China. .,Nanofibers Research Center, Modern Textile Institute, Donghua University, Shanghai, 200051, China.
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40
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Insight into the precursor nanofibers on the flexibility of La2O3-ZrO2 nanofibrous membranes. E-POLYMERS 2017. [DOI: 10.1515/epoly-2016-0088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractPoly(vinyl pyrrolidone) (PVP)/La3+/Zr4+ precursor nanofibrous membranes (LZPNM) with various Zr contents were synthesized via a simple electrospinning method. By controlling the Zr incorporation, the tensile properties of precursor membranes dramatically change from 0.77 to 1.73 MPa. Meanwhile, the average diameters of precursor nanofibers increase with the increase of Zr contents (from 283 to 535 nm). In addition, flexible La2O3-ZrO2 nanofibrous membranes (LZNM) were obtained by calcination of corresponding precursor membranes. Furthermore, the structures and morphologies of the precursor membranes were investigated using X-ray powder diffraction analysis (XRD) and field-emission scanning electron microscopy (FE-SEM). The surface functional groups and thermal properties of the precursor membranes were measured via Fourier transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA).
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41
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Affiliation(s)
- P. S. Suja
- Department of Chemistry, Material Research Laboratory, National Institute of Technology Calicut, Kozhikode, Kerala, India
| | - C. R. Reshmi
- Department of Chemistry, Material Research Laboratory, National Institute of Technology Calicut, Kozhikode, Kerala, India
| | - P. Sagitha
- Department of Chemistry, Material Research Laboratory, National Institute of Technology Calicut, Kozhikode, Kerala, India
| | - A. Sujith
- Department of Chemistry, Material Research Laboratory, National Institute of Technology Calicut, Kozhikode, Kerala, India
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42
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Xu C, Wang C, He X, Lyu M, Wang S, Wang L. Processable graphene oxide-embedded titanate nanofiber membranes with improved filtration performance. JOURNAL OF HAZARDOUS MATERIALS 2017; 325:214-222. [PMID: 27940110 DOI: 10.1016/j.jhazmat.2016.11.077] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 11/01/2016] [Accepted: 11/29/2016] [Indexed: 06/06/2023]
Abstract
Graphene oxide (GO)-embedded titanate nanofiber (TNF) membranes with improved filtration performance are prepared successfully by a two-step method including electrostatic assembly of GO and TNFs into hybrids and subsequent processing of them into membranes by vacuum filtration. The embedded contents of GO sheets in films and thickness of as-assembled films can be adjusted facilely, endowing such composite films with good processability. Owing to the skilful introduction of GO sheets, the pore and/or channel structures in these hybrid membranes are modified. By treating different dye solutions (Direct Yellow and Direct Red), the filtration properties of these membranes show that the introduction of certain amount of GO sheets efficiently improve the separation performance of the membranes. Interestingly, these GO-embedded TNF membranes also display superior selective separation performance on filtrating the mixture solutions of such two dyes, making these hierarchical membranes more flexible and versatile in water treatment areas.
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Affiliation(s)
- Chao Xu
- Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, PR China; School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.
| | - Chen Wang
- Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, PR China
| | - Xiaoping He
- Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, PR China
| | - Miaoqiang Lyu
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Songcan Wang
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Lianzhou Wang
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.
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43
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Zhao R, Li X, Sun B, Ji H, Wang C. Diethylenetriamine-assisted synthesis of amino-rich hydrothermal carbon-coated electrospun polyacrylonitrile fiber adsorbents for the removal of Cr(VI) and 2,4-dichlorophenoxyacetic acid. J Colloid Interface Sci 2017; 487:297-309. [DOI: 10.1016/j.jcis.2016.10.057] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 10/17/2016] [Accepted: 10/20/2016] [Indexed: 11/25/2022]
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44
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Wang Y, Huang H, Li G, Zhao X, Yu L, Zou C, Xu Y. Electrospun TiO2–SiO2 fibres with hierarchical pores from phase separation. CrystEngComm 2017. [DOI: 10.1039/c7ce00471k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Chen Z, Zeng J, Lv D, Gao J, Zhang J, Bai S, Li R, Hong M, Wu J. Halloysite nanotube-based electrospun ceramic nanofibre mat: a novel support for zeolite membranes. ROYAL SOCIETY OPEN SCIENCE 2016; 3:160552. [PMID: 28083098 PMCID: PMC5210680 DOI: 10.1098/rsos.160552] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 11/17/2016] [Indexed: 06/06/2023]
Abstract
Some key parameters of supports such as porosity, pore shape and size are of great importance for fabrication and performance of zeolite membranes. In this study, we fabricated millimetre-thick, self-standing electrospun ceramic nanofibre mats and employed them as a novel support for zeolite membranes. The nanofibre mats were prepared by electrospinning a halloysite nanotubes/polyvinyl pyrrolidone composite followed by a programmed sintering process. The interwoven nanofibre mats possess up to 80% porosity, narrow pore size distribution, low pore tortuosity and highly interconnected pore structure. Compared with the commercial α-Al2O3 supports prepared by powder compaction and sintering, the halloysite nanotube-based mats (HNMs) show higher flux, better adsorption of zeolite seeds, adhesion of zeolite membranes and lower Al leaching. Four types of zeolite membranes supported on HNMs have been successfully synthesized with either in situ crystallization or a secondary growth method, demonstrating good universality of HNMs for supporting zeolite membranes.
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Affiliation(s)
- Zhuwen Chen
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Jiaying Zeng
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, People's Republic of China
| | - Dong Lv
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, People's Republic of China
| | - Jinqiang Gao
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Jian Zhang
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Shan Bai
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Ruili Li
- Shenzhen Engineering Laboratory for Water Desalinization with Renewable Energy, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Mei Hong
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Jingshen Wu
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, People's Republic of China
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46
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Mao X, Bai Y, Yu J, Ding B. Insights into the flexibility of ZrMxOy (M = Na, Mg, Al) nanofibrous membranes as promising infrared stealth materials. Dalton Trans 2016; 45:6660-6. [DOI: 10.1039/c6dt00319b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An undersized dopant dependent brittle to flexible transition in ZrMxOy (M = Na, Mg, Al) nanofibrous membranes was revealed. Al doped zirconia nanofibrous membranes with an ultra-flexibility of 23 mN exhibit low infrared emissivity.
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Affiliation(s)
- Xue Mao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai 201620
- China
| | - Ying Bai
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai 201620
- China
| | - Jianyong Yu
- Nanofibers Research Center
- Modern Textile Institute
- Donghua University
- Shanghai 200051
- China
| | - Bin Ding
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai 201620
- China
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47
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Mahmoud BG, Khairy M, Rashwan FA, Foster CW, Banks CE. Self-assembly of porous copper oxide hierarchical nanostructures for selective determinations of glucose and ascorbic acid. RSC Adv 2016. [DOI: 10.1039/c5ra22940e] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
CuO with flower and hallow sphere-like morphology were fabricated via one pot hydrothermal method. The effect of copper ions source upon the CuO nanostructures assembly, selectivity and sensitivity in the electrochemical processes is explored.
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Affiliation(s)
- Bahaa G. Mahmoud
- Chemistry Department
- Faculty of Science
- Sohag University
- Sohag
- Egypt
| | - Mohamed Khairy
- Chemistry Department
- Faculty of Science
- Sohag University
- Sohag
- Egypt
| | | | - Christopher W. Foster
- Faculty of Science and Engineering
- School Science and the Environment
- Division of Chemistry and the Environment
- Manchester Metropolitan University
- Manchester M1 5GD
| | - Craig E. Banks
- Faculty of Science and Engineering
- School Science and the Environment
- Division of Chemistry and the Environment
- Manchester Metropolitan University
- Manchester M1 5GD
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48
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Controllable Preparation of Ultrathin Sandwich-Like Membrane with Porous Organic Framework and Graphene Oxide for Molecular Filtration. Sci Rep 2015; 5:14961. [PMID: 26455497 PMCID: PMC4601088 DOI: 10.1038/srep14961] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 09/09/2015] [Indexed: 12/02/2022] Open
Abstract
Porous organic frameworks (POFs) based membranes have potential applications in molecular filtration, despite the lack of a corresponding study. This study reports an interesting strategy to get processable POFs dispersion and a novel ultrathin sandwich-like membrane design. It was accidentally found that the hydrophobic N-rich Schiff based POFs agglomerates could react with lithium-ethylamine and formed stable dispersion in water. By successively filtrating the obtained POFs dispersion and graphene oxide (GO), we successfully prepared ultrathin sandwich-like hybrid membranes with layered structure, which showed significantly improved separation efficiency in molecular filtration of organic dyes. This study may provide a universal way to the preparation of processable POFs and their hybrid membranes with GO.
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49
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Han W, Ding B, Park M, Cui F, Ghouri ZK, Saud PS, Kim HY. Facile synthesis of luminescent and amorphous La₂O₃-ZrO₂:Eu³⁺ nanofibrous membranes with robust softness. NANOSCALE 2015; 7:14248-14253. [PMID: 26139103 DOI: 10.1039/c5nr02173a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Novel luminescent and amorphous La2O3-ZrO2:Eu(3+) (LZE) nanofibrous membranes with robust softness are fabricated for the first time via a facile electrospinning technique. By incorporating zirconium oxide, the as-prepared lanthanum oxide nanofibrous membranes can be dramatically changed from extreme fragility to robust softness. Meanwhile, the softness and luminescent performance of LZE nanofibrous membranes can be finely controlled by regulating the doping concentration of zirconium oxide and europium in lanthanum oxide nanofibers. Additionally, the crystal structure analysis using X-ray diffractometer and high resolution transmission electron microscopy measurements have confirmed the correlation between the amorphous structure and softness. Furthermore, LZE membranes show the characteristic emission of Eu(3+) corresponding to (5)D(0, 1, 2)-(7)F(0, 1, 2, 3, 4) transitions due to an efficient energy transfer from O(2-) to Eu(3+). The LZE nanofibrous membranes with the optimum doping Eu(3+) concentration of 3 mol% exhibit excellent softness and luminescent properties, which make the materials to have potential applications in fluorescent lamps and field emission displays.
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Affiliation(s)
- Weidong Han
- Department of BIN Fusion Technology, Chonbuk National University, Jeonju 561-756, Republic of Korea.
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50
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Xu J, Yu H, Yang L, Wu G, Wang Z, Wang D, Zhang X. Self-assembling 1D core/shell microrods by the introduction of additives: a one-pot and shell-tunable method. Chem Sci 2015; 6:4907-4911. [PMID: 28717495 PMCID: PMC5504466 DOI: 10.1039/c5sc01631b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 06/03/2015] [Indexed: 11/21/2022] Open
Abstract
Herein, we have developed a one-pot method for the fabrication of one-dimensional core/shell microrods with tunable shell compositions by the introduction of additives. Crystalline dimethyl melamine hydrochloride was utilized as the core, while melamine derivatives with different functional groups, such as pyrene, thiophene and naphthalene diimide, served as additives to regulate the core morphology and were adsorbed as the shell. The length and width of these one-dimensional structures can be tuned by varying the molar ratio of core and shell molecules as well as their total concentration. Through X-ray diffraction, the detailed molecular arrangements within the core of the microrods were revealed, and the selective effect of additives on specific crystal faces was evaluated. It is anticipated that this work may provide a facile approach for the fabrication of one-dimensional functional materials.
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Affiliation(s)
- Jun Xu
- MOE Key Lab of Organic Optoelectronics & Molecular Engineering , Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China .
| | - Hongde Yu
- MOE Key Lab of Organic Optoelectronics & Molecular Engineering , Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China .
| | - Liulin Yang
- MOE Key Lab of Organic Optoelectronics & Molecular Engineering , Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China .
| | - Guanglu Wu
- MOE Key Lab of Organic Optoelectronics & Molecular Engineering , Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China .
| | - Zhiqiang Wang
- MOE Key Lab of Organic Optoelectronics & Molecular Engineering , Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China .
| | - Dong Wang
- MOE Key Lab of Organic Optoelectronics & Molecular Engineering , Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China .
| | - Xi Zhang
- MOE Key Lab of Organic Optoelectronics & Molecular Engineering , Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China .
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