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Liu Y, Zhang J, Li J, Zhao Y, Zhang M. Impact of SiO 2 doping on the structure and oil-water separation properties of a PVDF membrane: insights from molecular dynamics simulation. RSC Adv 2024; 14:23910-23920. [PMID: 39086518 PMCID: PMC11289665 DOI: 10.1039/d4ra03807j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Accepted: 07/22/2024] [Indexed: 08/02/2024] Open
Abstract
Hybrid inorganic particles combined with polymers are widely used to modify the properties of polymer membranes. However, the mechanism by which particles affect membranes remains unclear. This study investigates SiO2-hybridized PVDF membranes through molecular dynamic simulation, focusing on the interaction between SiO2 clusters and PVDF chains. It examines the impact of varying SiO2 concentrations (3.5 wt%, 6.8 wt%, 9.9 wt%, 12.8 wt%, and 15.5 wt%) on membrane stability and structure. The results indicate that adding SiO2 can inhibit PVDF chain mobility in the membrane with minimal effect on fractional free volume (FFV), except for altering interactions between PVDF-PVDF, PVDF-SiO2, and SiO2-SiO2, thereby affecting the structure of hybrid membranes. The adsorption and diffusion behavior of water and oil molecules on these membranes were also studied. It was observed that the adsorption energy and diffusion coefficient initially increase and then decrease with increasing SiO2 concentration, reaching an optimum between 6.8 wt% and 12.8 wt%. This phenomenon is attributed to the ability of optimal SiO2 concentrations to create hydrophilic channels in PVDF membranes, enhancing water affinity and reducing oil affinity. Consequently, water permeation through the hybrid membrane is promoted, improving the efficiency of oil/water separation compared to pure PVDF membranes. This research contributes to understanding the function of adding inorganic particles to polymer membranes and provides insights for designing advanced functional hybrid membranes.
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Affiliation(s)
- Yi Liu
- School of Chemistry and Chemical Engineering, Tianjin University of Technology Tianjin 300384 China
- Center of Membrane Materials and Engineering Technology, Tianjin University of Technology Tianjin 300384 China
| | - Jing Zhang
- School of Chemistry and Chemical Engineering, Tianjin University of Technology Tianjin 300384 China
- Center of Membrane Materials and Engineering Technology, Tianjin University of Technology Tianjin 300384 China
| | - Jiale Li
- School of Chemistry and Chemical Engineering, Tianjin University of Technology Tianjin 300384 China
- Center of Membrane Materials and Engineering Technology, Tianjin University of Technology Tianjin 300384 China
| | - Yuxing Zhao
- School of Chemistry and Chemical Engineering, Tianjin University of Technology Tianjin 300384 China
- Center of Membrane Materials and Engineering Technology, Tianjin University of Technology Tianjin 300384 China
| | - Ming Zhang
- School of Chemistry and Chemical Engineering, Tianjin University of Technology Tianjin 300384 China
- Center of Membrane Materials and Engineering Technology, Tianjin University of Technology Tianjin 300384 China
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2
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Le TMH, Chuchak R, Sairiam S. Empowering TiO 2-coated PVDF membranes stability with polyaniline and polydopamine for synergistic separation and photocatalytic enhancement in dye wastewater purification. Sci Rep 2024; 14:15969. [PMID: 38987324 PMCID: PMC11237106 DOI: 10.1038/s41598-024-66996-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Accepted: 07/08/2024] [Indexed: 07/12/2024] Open
Abstract
Photocatalytic membranes are effective in removing organic dyes, but their low UV resistance poses a challenge. To address this, self-protected photocatalytic PVDF membranes were developed using polyaniline (PANI) and polydopamine (PDA), whaich are anti-oxidation polymers, as interlayers between the membrane and TiO2. PVDF membranes were first modified by a self-polymerization layer of either PANI or PDA and then coated with titanium dioxide (TiO2). The TiO2 remained firmly attached to the PANI and PDA layer, regardless of sonication and prolonged usage. The PANI and PDA layers enhanced the durability of PVDF membrane under UV/TiO2 activation. After 72 h of irradiation, PVDF-PDA-TiO2 and PVDF-PANI-TiO2 membranes exhibited no significant change. This process improved both separation and photocatalytic activity in dye wastewater treatment. The PVDF-PDA-TiO2 and PVDF-PANI-TiO2 membranes showed enhanced membrane hydrophilicity, aiding in the rejection of organic pollutants and reducing fouling. The modified membranes exhibited a significant improvement in the flux recovery rate, attributed to the synergistic effects of high hydrophilicity and photocatalytic activity. Specially, the flux recovery rate increased from 17.7% (original PVDF) to 56.3% and 37.1% for the PVDF-PDA-TiO2 membrane and PVDF-PANI-TiO2 membrane. In dye rejection tests, the PVDF‒PDA‒TiO2 membrane achieved 88% efficiency, while the PVDF‒PANI‒TiO2 reached 95.7%. Additionally, the photodegradation of Reactive Red 239 (RR239) by these membranes further improved dye removal. Despite an 11% reduction in flux, the PVDF-PDA-TiO2 membrane demonstrated greater durability and longevity. The assistance of PANI and PDA in TiO2 coating also improved COD removal (from 33 to 58-68%) and provided self-protection for photocatalytic membranes, indicating that these photocatalytic membranes can contribute to more sustainable wastewater treatment processes.
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Affiliation(s)
- Thi My Hanh Le
- International Postgraduate Program in Hazardous Substance and Environmental Management, Chulalongkorn University, Bangkok, 10330, Thailand
- Center of Excellence on Hazardous Substance Management, Chulalongkorn University, Bangkok, 10330, Thailand
- Water Science and Technology for Sustainable Environment Research Unit, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Rasika Chuchak
- Department of Environmental Science, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Sermpong Sairiam
- Center of Excellence on Hazardous Substance Management, Chulalongkorn University, Bangkok, 10330, Thailand.
- Water Science and Technology for Sustainable Environment Research Unit, Chulalongkorn University, Bangkok, 10330, Thailand.
- Department of Environmental Science, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
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3
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Naderi N, Ganjali F, Eivazzadeh-Keihan R, Maleki A, Sillanpää M. Applications of hollow nanostructures in water treatment considering organic, inorganic, and bacterial pollutants. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 356:120670. [PMID: 38531142 DOI: 10.1016/j.jenvman.2024.120670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 03/03/2024] [Accepted: 03/12/2024] [Indexed: 03/28/2024]
Abstract
One of the major issues of modern society is water contamination with different organic, inorganic, and contaminants bacteria. Finding cost-effective and efficient materials and methods for water treatment and environment remediation is among the scientists' most important considerations. Hollow-structured nanomaterials, including hollow fiber membranes, hollow spheres, hollow nanoboxes, etc., have shown an exciting capability for wastewater refinement approaches, including membrane technology, adsorption, and photocatalytic procedure due to their extremely high specific surface area, high porosity, unique morphology, and low density. Diverse hollow nanostructures could potentially eliminate organic contaminants, including dyes, antibiotics, oil/water emulsions, pesticides, and other phenolic compounds, inorganic pollutants, such as heavy metal ions, salts, phosphate, bromate, and other ions, and bacteria contaminations. Here, a comprehensive overview of hollow nanostructures' fabrication and modification, water contaminant classification, and recent studies in the water treatment field using hollow-structured nanomaterials with a comparative attitude have been provided, indicating the privilege abd detriments of this class of nanomaterials. Eventually, the future outlook of employing hollow nanomaterials in water refinery systems and the upcoming challenges arising in scaling up are also propounded.
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Affiliation(s)
- Nooshin Naderi
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
| | - Fatemeh Ganjali
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
| | - Reza Eivazzadeh-Keihan
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran.
| | - Ali Maleki
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran.
| | - Mika Sillanpää
- Department of Chemical Engineering, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, P. O. Box 17011, Doornfontein, 2028, South Africa; International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan, 173212, Himachal Pradesh, India; Department of Biological and Chemical Engineering, Aarhus University, Nørrebrogade 44, 8000, Aarhus C, Denmark; Department of Civil Engineering, University Centre for Research & Development, Chandigarh University, Gharuan, Mohali, Punjab, India.
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4
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Wang D, Huang L, Fang H, Li S, Wang G, Zhou S, Zhao R, Sun X. Activated carbon fibers functionalized with superhydrophilic coated pDA/TiO 2/SiO 2 with photoluminescent self-cleaning properties for efficient oil-water separation. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133373. [PMID: 38159520 DOI: 10.1016/j.jhazmat.2023.133373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/14/2023] [Accepted: 12/23/2023] [Indexed: 01/03/2024]
Abstract
The adhesion of high-viscosity oil contamination poses limitations on three-dimensional (3D) materials' practical use in treating oilfield-produced water (OPW). In this study, we developed a hybrid pDA/TiO2/SiO2 coating (PTS) on the surface of hydrophilic activated carbon (ACF1) through a combination of dopamine (DA) polymerization, ethyl orthosilicate (TEOS) hydrolysis, and the condensation of TiO2 nanoparticles (NPs) with SiO2 NPs. This coating was designed for gravity-based oil-water separation. The inherent porosity and generous pore size of ACF1-PTS conferred it an ultra-high permeation flux (pure water flux of 3.72 × 105 L∙m-2∙h-1), allowing it to effectively separate simulated oil-water mixtures and oil-water emulsions while maintaining exceptional permeation flux and oil rejection efficiency. When compared to cleaning methods involving ethanol aqueous solutions and NaClO, ultraviolet (UV) illumination cleaning proved superior, enabling oil-contaminated ACF1-PTS to exhibit remarkable flux recovery efficiency and oil-removal capabilities during cyclic separation of actual OPW. Furthermore, the ACF1-PTS material demonstrated impressive stability and durability when exposed to acidic environments (acid, alkali, and salt), robust hydraulic washout conditions, and 25-cycle tests. This study offers valuable insights and research avenues for the development of highly efficient and environmentally friendly 3D oil-water separation materials for the actual treatment of OPW.
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Affiliation(s)
- Dongdong Wang
- School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
| | - Likun Huang
- School of Food Engineering, Harbin University of Commerce, Harbin 150076, China.
| | - Hanxiao Fang
- School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
| | - Shaofang Li
- School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
| | - Guangzhi Wang
- School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China.
| | - Simin Zhou
- School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
| | - Rui Zhao
- School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
| | - Xiyu Sun
- School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
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5
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Zhang B, Peng Y, Yao Y, Hong X, Wu Y. Constructing a composite microfiltration carbon membrane by TiO 2 and Fe 2O 3 for efficient separation of oil-water emulsions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:92027-92041. [PMID: 37480529 DOI: 10.1007/s11356-023-28728-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 07/06/2023] [Indexed: 07/24/2023]
Abstract
Membrane-based separation technology has attracted enormous attention for oil/water emulsion treatment. Here, composite microfiltration carbon membranes (MCMs) were prepared from the precursor of phenolic resin doping with TiO2 and Fe2O3 via the processes of stereotype and pyrolysis. The functional groups, thermal stability, porous structure, microstructure, morphology, and hydrophilicity of the membrane samples were analyzed by Fourier-transform infrared spectroscopy, thermogravimetric analysis, bubble pressure method, X-ray diffraction, scanning electron microscope, and water contact angle, respectively. The effect of dopant amount on the separation performance of MCMs was investigated. The results show that a mixed matrix system is constructed by TiO2 and Fe2O3 in MCMs, which is beneficial for further optimizing the pore size, porosity, and hydrophilicity of MCMs for oily wastewater treatment by varying the dopant amount. The maximum oil rejections are achieved at 98.9% and 99.6% for MCMs with a dopant content of TiO2 and Fe2O3 at 25%, respectively. In brief, this study offers an attractive strategy for improving the separation performance of MCMs for oily wastewater.
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Affiliation(s)
- Bing Zhang
- School of Petrochemical Engineering, Shenyang University of Technology, No. 30 Guanghua Street, Liaoyang, 111003, China.
| | - Yao Peng
- School of Petrochemical Engineering, Shenyang University of Technology, No. 30 Guanghua Street, Liaoyang, 111003, China
| | - Yanhu Yao
- School of Petrochemical Engineering, Shenyang University of Technology, No. 30 Guanghua Street, Liaoyang, 111003, China
| | - Xueqian Hong
- School of Petrochemical Engineering, Shenyang University of Technology, No. 30 Guanghua Street, Liaoyang, 111003, China
| | - Yonghong Wu
- School of Petrochemical Engineering, Shenyang University of Technology, No. 30 Guanghua Street, Liaoyang, 111003, China
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6
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Lin Y, Xie A, Xu J, Xue C, Cui J, Pan J. One-Step Hydrothermal Strategy for Preparation of a Self-Cleaning TiO 2/SiO 2 Fiber Membrane toward Oil-Water Separation in a Complex Environment. MEMBRANES 2023; 13:membranes13050514. [PMID: 37233575 DOI: 10.3390/membranes13050514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/06/2023] [Accepted: 05/07/2023] [Indexed: 05/27/2023]
Abstract
Oil pollution caused by a large number of industrial activities and oil spill accidents has posed serious harm to the environment and human health. However, some challenges remain with the existing separation materials, such as poor stability and fouling resistance. Herein, a TiO2/SiO2 fiber membrane (TSFM) was prepared by a one-step hydrothermal method for oil-water separation in acid, alkali, and salt environments. The TiO2 nanoparticles were successfully grown on the fiber surface, endowing the membrane with superhydrophilicity/underwater superoleophobicity. The as-prepared TSFM exhibits high separation efficiency (above 98%) and separation fluxes (3016.38-3263.45 L·m-2·h-1) for various oil-water mixtures. Importantly, the membrane shows good corrosion resistance in acid, alkaline, and salt solutions and still maintains underwater superoleophobicity and high separation performance. The TSFM displays good performance after repeated separation, demonstrating its excellent antifouling ability. Importantly, the pollutants on the membrane surface can be effectively degraded under light radiation to restore its underwater superoleophobicity, showing the unique self-cleaning ability of the membrane. In view of its good self-cleaning ability and environmental stability, the membrane can be used for wastewater treatment and oil spill recovery and has a broad application prospect in water treatment in complex environments.
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Affiliation(s)
- Yinghao Lin
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
| | - Atian Xie
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
- Jiangsu Agrochem Laboratory Co., Ltd., Changzhou 213022, China
| | - Jian Xu
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
| | - Changguo Xue
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
| | - Jiuyun Cui
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
| | - Jianming Pan
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
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7
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Li X, He X, Ling Y, Bai Z, Liu C, Liu X, Jia K. In-situ growth of silver nanoparticles on sulfonated polyarylene ether nitrile nanofibers as super-wetting antibacterial oil/water separation membranes. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2023.121539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
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8
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Cheng B, Yan S, Li Y, Zheng L, Wen X, Tan Y, Yin X. In-situ growth of robust and superhydrophilic nano-skin on electrospun Janus nanofibrous membrane for oil/water emulsions separation. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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9
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Goh PS, Samavati Z, Ismail AF, Ng BC, Abdullah MS, Hilal N. Modification of Liquid Separation Membranes Using Multidimensional Nanomaterials: Revealing the Roles of Dimension Based on Classical Titanium Dioxide. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13030448. [PMID: 36770409 PMCID: PMC9920479 DOI: 10.3390/nano13030448] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 05/27/2023]
Abstract
Membrane technology has become increasingly popular and important for separation processes in industries, as well as for desalination and wastewater treatment. Over the last decade, the merger of nanotechnology and membrane technology in the development of nanocomposite membranes has emerged as a rapidly expanding research area. The key motivation driving the development of nanocomposite membranes is the pursuit of high-performance liquid separation membranes that can address the bottlenecks of conventionally used polymeric membranes. Nanostructured materials in the form of zero to three-dimensions exhibit unique dimension-dependent morphology and topology that have triggered considerable attention in various fields. While the surface hydrophilicity, antibacterial, and photocatalytic properties of TiO2 are particularly attractive for liquid separation membranes, the geometry-dependent properties of the nanocomposite membrane can be further fine-tuned by selecting the nanostructures with the right dimension. This review aims to provide an overview and comments on the state-of-the-art modifications of liquid separation membrane using TiO2 as a classical example of multidimensional nanomaterials. The performances of TiO2-incorporated nanocomposite membranes are discussed with attention placed on the special features rendered by their structures and dimensions. The innovations and breakthroughs made in the synthesis and modifications of structure-controlled TiO2 and its composites have enabled fascinating and advantageous properties for the development of high-performance nanocomposite membranes for liquid separation.
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Affiliation(s)
- Pei Sean Goh
- Advanced Membrane Technology Research Centre, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - Zahra Samavati
- Advanced Membrane Technology Research Centre, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - Ahmad Fauzi Ismail
- Advanced Membrane Technology Research Centre, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - Be Cheer Ng
- Advanced Membrane Technology Research Centre, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - Mohd Sohaimi Abdullah
- Advanced Membrane Technology Research Centre, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - Nidal Hilal
- NYUAD Water Research Center, New York University Abu Dhabi, Abu Dhabi 129188, United Arab Emirates
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Ultrafiltration membranes prepared via mixed solvent phase separation with enhanced performance for produced water treatment. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2023.121375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Textured ceramic membranes for desilting and deoiling of produced water in the Permian Basin. iScience 2022; 25:105063. [PMID: 36157574 PMCID: PMC9490591 DOI: 10.1016/j.isci.2022.105063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 08/01/2022] [Accepted: 08/30/2022] [Indexed: 11/20/2022] Open
Abstract
Oil production in the Permian Basin gives rise to large volumes of produced water contaminated by silt, emulsified oil, and additives used for enhanced oil recovery. There is intense interest in the design of membrane modules as sustainable alternatives for produced water treatment to enable the reuse of produced water for agricultural applications, injection into aquifers, and redeployment in oil recovery. Here, we report a hierarchically textured cement-based membrane exhibiting orthogonal wettability, specifically, superhydrophilic and underwater superoleophobic characteristics. The in situ formation of ettringite needles accompanied by embedding of glass spheres imbues multiscale texturation to stainless-steel mesh membranes, enabling the separation of silt and oil from produced water at high flux rates (1600 L h−1۰m−2, at ca. 2.7 bar). Oil concentration is reduced as low as 1 ppb with an overall separation efficiency of 99.7% in single-pass filtration. The membranes show outstanding mechanical resilience and retention of performance across multiple cycles. Multiscale 3D texturation of a metal mesh membrane engenders orthogonal wettability High separation efficiency of ca. 99% was achieved for produced water Oil concentration reduced to ≤1 ppb in a single pass at a high flux rate Desiliting and deoiling demonstrated for real produced water streams
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