Article
Chemistry, Applied
Zixuan Wu, Xin Ji, Quanlong He, Hongbo Gu, Wei-xian Zhang, Zilong Deng
Summary: To mitigate membrane fouling and address the trade-off between permeability and selectivity, nanocellulose fine-tuned polyvinylidene fluoride (PVDF) porous membranes were fabricated. The incorporation of cellulose nanocrystals and oxidized cellulose nanofibers improved the surface charge, hydrophilicity, porosity, and tensile strength of the membranes. The NC-PVDF membranes exhibited enhanced flux, rejection, and fouling resistance, making them promising candidates for membrane separation.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Physical
Qinfu Zhao, Xinqian Liu, Stephen Veldhuis, Igor Zhitomirsky
Summary: PVDF is an advanced functional polymer with excellent properties, and this study proposes a new strategy for the fabrication of nanocomposites by combining PVDF with advanced inorganic nanomaterials. Through electrophoretic deposition, films containing PVDF and nanoparticles like TiO2, MnO2, and NiFe2O4 can be fabricated, with the use of caffeic acid and catechol violet as co-dispersants found to aid particle dispersion, charging, and deposition.
Article
Engineering, Chemical
Patrick Dutournie, Liva Dzene, Arnaud Ponche, T. Jean Daou, Sebastien Deon
Summary: This study investigates the specific interactions between titania membrane and fluoride anions during ultrafiltration operation. Numerical investigations show that at low concentrations, the transmission of fluoride-based salts decreases due to a modification of the electric charge of the membrane surface caused by fluoride ions. This modification can be explained by the substitution of oxygen atom with a fluoride ion.
Article
Biochemistry & Molecular Biology
Shruti Sakarkar, Shobha Muthukumaran, Veeriah Jegatheesan
Summary: This study successfully enhanced the thermal and chemical stability of PVDF membranes and improved photocatalytic performance by coating them with TiO2/PVA thin film coating. The membranes showed good performance in dye filtration and reusability under UV irradiation. This work provides a new vision in the fabrication of TFC polymeric membranes for efficient wastewater treatment.
Article
Environmental Sciences
Lei Wu, Ying Liu, Jian Hu, Xueting Feng, Cong Ma, Chen Wen
Summary: The study investigated the effects of blending modification of graphene oxide and deposition of silver carbonate on PVDF membranes, finding that the PGA membranes exhibited improved pollution resistance and permeability, with the PGA-3 membrane showing the best performance in multi-cycle filtration experiments.
Article
Polymer Science
Jiahui Kan, Zhixuan Zhang, Liang Ren, Jian Han, Huixin Zhang, Jihui Li, Hong Wu, Jianxin Chen
Summary: The main purpose of this work is to improve the hydrophilicity and antifouling properties of hydrophobic PVDF microfiltration membranes through modification. The as-prepared PVDF-PG/PEI/CTS membranes showed a smaller water contact angle and significantly increased pure water flux. The modified membrane also exhibited high stability and efficiency in the separation of oil-in-water emulsions.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Makoto Hirota, Yoshihiko Sugita, Manabu Ishijima, Takayuki Ikeda, Juri Saruta, Hatsuhiko Maeda, Takahiro Ogawa
Summary: The study demonstrates that UV treatment significantly restores osteoconductivity compromised by bacterial biofilm contamination on titanium surfaces, leading to increased bone-implant integration and bone formation, providing new possibilities for clinical applications.
MATERIALS TODAY ADVANCES
(2021)
Article
Multidisciplinary Sciences
Heba A. A. El-Gawad, Ebrahiem Esmail Ebrahiem, Montaser Y. Y. Ghaly, Ahmed A. A. Afify, R. M. Mohamed
Summary: This study demonstrates that photo-catalytic oxidation is a promising technique for treating simulated oily wastewater. Factors such as initial oil concentration, catalyst dose, stirring speed, pH value, and hydrogen peroxide dose were investigated for their impact on the degradation rate. It was found that the optimal operating parameters for oil removal were an initial oil concentration of 1 g/L, stirring speed of 850 rpm, pH of 8, 3 mL of hydrogen peroxide, and 1.5 g/L of titanium dioxide, resulting in a removal percentage of 98.43% after 40 minutes of irradiation. The application of these parameters to industrial oily wastewater resulted in a 99% oil removal rate after 40 minutes of reaction time with the addition of 3 mL of hydrogen peroxide.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Ferenc Koppany, Krisztian Benedek Csomo, Edvard Marton Varmuzsa, Eszter Bognar, Liza Pelyhe, Peter Nagy, Imre Kientzl, Daniel Szabo, Miklos Weszl, Gabor Dobos, Sandor Lenk, Gabor Erdei, Gabor Kiss, Lilien Nagy, Attila Sreter, Andrea Alexandra Belik, Zsuzsanna Toth, Janos Vag, Arpad Joob-Fancsaly, Zsolt Nemeth
Summary: Our research group developed a novel nano-pitted (NP) TiO2 surface on grade 2 titanium that showed good mechanical, osteogenic, and antibacterial properties; however, it showed weak hydrophilicity. To enhance the hydrophilicity without destroying the nano-topography, we investigated the effects of orthophosphoric and nitric acids on wettability. The ccH(3)PO(4) treatment significantly increased the wettability of the NP TiO2 surfaces and could be used in industrial-scale manufacturing of titanium implants.
Article
Engineering, Environmental
T. Senthil Muthu Kumar, K. Senthilkumar, Mantiya Ratanit, N. Rajini, Noppavan Chanunpanich, N. Hariram, Peerapong Pornwongthong, Suchart Siengchin
Summary: This article investigates the impact of adding different concentrations of TiO2 to PVDF/CA electrospun membranes on the removal of toxic organic compound 1,4-dioxane, finding that the addition of TiO2 can enhance the filtration efficiency of the membranes and exhibit antibacterial activity.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Dabin Park, Hyun Ju, Jooheon Kim
Summary: This study presents a fabrication method for Ag2Se nanowire/PVDF composite films with outstanding thermoelectric power factor, specifically highlighting the exceptional durability and enhanced power factor of the film containing 70% Ag2Se nanowires.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Engineering, Environmental
G. T. M. Xavier, A. L. Urzedo, R. S. Nunes, P. S. Fadini, W. A. Carvalho
Summary: Phosphorus (P) is crucial for life and is considered a non-renewable resource that is essential for global food security. This study investigated the use of a chemically modified clay adsorbent to develop a porous membrane capable of adsorbing P from solutions. The membranes showed a heterogeneous structure and achieved a P uptake equilibrium in 360 min, removing 50% of the initial P in the solution. The developed membrane holds promise for efficient P uptake from solutions.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Polymer Science
Guilherme Schiavao Padovani, Alex Otavio Sanches, Marcia Regina Moura Aouada, Luiz Francisco Malmonge, Fernando Rogerio de Paula
Summary: This study successfully developed a photocatalytic membrane reactor system using poly(vinylidene fluoride)/titanium oxide membranes, which effectively removed E. coli and total coliforms from polluted water.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Multidisciplinary
Wahyudiono, Hiroki Kondo, Siti Machmudah, Hideki Kanda, Yaping Zhao, Motonobu Goto
Summary: The study demonstrated the utilization of an electric field generated by high voltage discharge plasma over a liquid water surface containing glycine compound to synthesize TiO2 nanoparticles. The applied voltages, pulse numbers, and repetition rates significantly influenced the decomposition reaction of glycine compounds and electrode erosion. The UV-vis spectra and HRTEM images confirmed the formation of TiO2 nanoparticles and TiC as nanoparticle products, suggesting that this process has potential for advanced nanoparticle synthesis technology.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Tinglu Chen, Fenghe Wu, Zheng Chen, Jinhao Huo, Yue Zhao, Lizhi Zhang, Jian Zhou
Summary: DPD simulations were used to study the modification of PVDF membrane by adding PSBMA-TEOS grafted SNPs, with polymer concentration and grafting architecture affecting membrane morphology. An optimal polymer concentration of 25-30% was found, and M8-5, M10-5, and M12-5 systems showed stable membrane morphologies in comparison to other grafting architectures.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Polymer Science
Furkan Turgut, Chun Yew Chong, Mustafa Karaman, Woei Jye Lau, Mehmet Gursoy, Ahmad Fauzi Ismail
Summary: In this study, two different monomers were used to modify graphene oxide (GO) nanosheets via an environmentally friendly plasma-enhanced method. The modified GOs were then used as nano-fillers for the development of a composite polyethersulfone ultrafiltration membrane with improved surface properties. The results showed that the membrane incorporated with hydrophilic-coated GOs achieved better oil rejection, antifouling resistance, and water recovery rate compared to the membrane incorporated with hydrophobic-coated GOs.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yanuardi Raharjo, Ahmad Fauzi Ismail, Mohd Hafiz Dzarfan Othman, Mochamad Zakki Fahmi, Saiful, Djoko Santoso, Mochamad Ifan Nugroho, Diana Merna, Maipha Deapati Arief, Risma Chikita Pratama
Summary: This study aimed to develop a novel imprinted zeolite (IZC) and incorporate it into a polyethersulfone (PES) and poly(vinyl pyrrolidone) (PVP) mixed matrix membrane (HF-MMM) for hemodialysis treatment. The optimized parameters showed that this membrane has the potential to effectively remove uremic toxins.
Review
Chemistry, Multidisciplinary
Pei Sean Goh, Zahra Samavati, Ahmad Fauzi Ismail, Be Cheer Ng, Mohd Sohaimi Abdullah, Nidal Hilal
Summary: Membrane technology has gained popularity in industries for separation processes, desalination, and wastewater treatment. The development of nanocomposite membranes that merge nanotechnology and membrane technology has become a rapidly growing research area, motivated by the need for high-performance liquid separation membranes. The unique morphology and topology of nanostructured materials, such as TiO2, have attracted attention due to their hydrophilicity, antibacterial, and photocatalytic properties. This review provides an overview of the modifications of liquid separation membranes using TiO2 as an example of multidimensional nanomaterials, discussing their performance and advantages.
Article
Chemistry, Analytical
Naveen Sunder, Yeong-Yin Fong, Mohamad Azmi Bustam, Woei-Jye Lau
Summary: The increase in global population has led to a higher demand for energy production, which has mainly been met through the burning of natural gas. However, the purification of natural gas has caused an increase in CO2 levels. Hollow fiber membranes, specifically the NH2-MIL-125(Ti)/CTA HFMMMs, offer a more efficient and sustainable solution for carbon capture due to their large surface-to-volume ratio and smaller footprint. These membranes demonstrate a promising CO2/CH4 ideal gas selectivity and CO2 permeability, making them a potential technology for reducing CO2 emissions.
Article
Environmental Sciences
Noresah Said, Woei Jye Lau, Muhammad Nidzhom Zainol Abidin, Amir Mansourizadeh, Ahmad Fauzi Ismail
Summary: In this study, poly(citric acid)-grafted graphene oxide (PGO) was incorporated into single-layer hollow fiber (SLHF) and dual-layer hollow fiber (DLHF) membranes to improve their antifouling properties during water treatment. The optimized PGO loading of 0.7 wt% in SLHF membrane resulted in higher water permeability and bovine serum albumin rejection compared to the neat membrane. Similarly, introducing 0.7 wt% PGO only to the outer layer of DLHF membrane improved its antifouling properties and increased the rejection rate of bovine serum albumin to 97.7%.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Polymer Science
Kopano Edward Mokubung, Lloyd Njoka Ndlovu, Woei Jye Lau, Edward Ndumiso Nxumalo, Nozipho Nonsikelelo Gumbi
Summary: This study fabricated mixed matrix membranes (MMMs) for ultrafiltration using 3-aminopropyltriethoxysilane modified magnetite iron oxide nanoparticles (A-Fe3O4 NPs) through a modified phase inversion technique. The physiochemical properties and surface morphologies of the synthesized A-Fe3O4 NPs and fabricated MMMs were examined using advanced characterization techniques. The incorporation of higher loadings of A-Fe3O4 NPs in the membrane matrix significantly improved the adsorptive ability and hydrophilicity of the adsorbent, leading to improved membrane water permeance, adsorption rate, and adsorption-filtration properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Kathleen Foo, Yong Yeow Liang, Woei Jye Lau, Md Maksudur Rahman Khan, Abdul Latif Ahmad
Summary: Desalination of high-salinity water, also known as hypersaline brine, is a method to address the issue of brine disposal. However, the energy consumption is high in hypersaline brine desalination due to the high operating pressure. A parametric analysis on a spiral wound membrane module was conducted to predict the performance of hypersaline brine desalination. The study found that a minimum inlet pressure of 75 bar is recommended to minimize energy consumption, and higher feed velocity can increase productivity without significantly increasing energy requirements. The efficiency of pressure recovery and pump play a crucial role in reducing specific energy consumption (SEC) in hypersaline brine desalination using spiral wound membrane, and utilizing them with high efficiencies (eta(R) >= 95% and eta(pump) >= 50%) can reduce SEC by at least 33% while achieving a comparable SEC with seawater reverse osmosis (SWRO) desalination (<5.5 kWh/m(3)).
Article
Biochemistry & Molecular Biology
En Qi Lim, Mei Qun Seah, Woei Jye Lau, Hasrinah Hasbullah, Pei Sean Goh, Ahmad Fauzi Ismail, Daryoush Emadzadeh
Summary: Many commercial nanofiltrations (NF) and reverse osmosis (RO) membranes were evaluated for their efficiency in removing phthalates from water sources. It was found that the NF3 membrane showed the best performance in removing phthalates regardless of pH, due to its surface properties and appropriate pore size. Additionally, the NF3 membrane exhibited higher water flux compared to the RO membranes. However, further research is needed to investigate the effects of other compounds on membrane performance.
Article
Biochemistry & Molecular Biology
Sutrasno Kartohardjono, Ghofira Muna Khansa Salsabila, Azzahra Ramadhani, Irfan Purnawan, Woei Jye Lau
Summary: The study focuses on utilizing PVDF membranes incorporated with PVP additives for the treatment of oily wastewater through the UF process. The addition of PVP improves the physical and chemical properties of the membrane, resulting in increased permeability and hydrophilicity. However, the rejections for TSS, turbidity, TDS, and COD are reduced with increasing PVP content.
Article
Engineering, Chemical
Komathi Kannathasan, Juhana Jaafar, Nuor Sariyan Suhaimin, Nurul Natasha Mohammad Jafri, Sadaki Samitsu, N. H. Alias, A. F. Ismail, T. Matsuura, M. H. D. Othman, Mukhlis A. Rahman, Farhana Aziz, Norhaniza Yusof, Mohammed Rasool Qtaishat, M. I. Ismail
Summary: A novel method of fabricating translucent photocatalytic membrane using a modified morphological structure as a photocatalyst has been developed. The study highlights the effect of translucency on the efficiency of photocatalytic reactions.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Environmental
Nor Akalili Ahmad, Lih Jang Tam, Pei Sean Goh, Nurfirzanah Azman, Ahmad Fauzi Ismail, Khairulnadzmi Jamaluddin, Gangasalam Arthanareeswaran
Summary: In this study, a thin film composite (TFC) reverse osmosis (RO) membrane with high long-term stability and antifouling properties was developed by spray coating the polyamide (PA) layer with oppositely charged titania nanosheets (TNS). The manufactured membranes showed improved permeability and radionuclide rejection, making them suitable for treating radionuclide-containing wastewater. The findings highlight the potential of tailored TFC RO membranes in the treatment of radioactive wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Noor Fauziyah Ishak, Nur Hidayati Othman, Najihah Jamil, Nur Hashimah Alias, Fauziah Marpani, Munawar Zaman Shahruddin, Lau Woei Jye, Ahmad Fauzi Ismail
Summary: Modifying polymeric membranes using ZIF-8 functionalized-2D nanofillers showed improved gas permeability and selectivity performance. The rGO/ZIF-8 and MoS2/ZIF-8 nanofillers were successfully synthesized and characterized. Addition of 10 wt% of each nanofiller to the PES solution resulted in MMMs with enhanced thermal stability. Compatibility between the 2D nanofillers and PES matrix was confirmed by FTIR and XRD analysis. The obtained MMMs exhibited significantly improved gas separation properties, demonstrating the potential of using 2D nanofillers for high-performance membranes.
PERTANIKA JOURNAL OF SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Nurul Syazana Fuzil, Nur Hidayati Othman, Nur Hashimah Alias, Fauziah Marpani, Muhammad Shafiq Mat Shayuti, Munawar Zaman Shahruddin, Mohd Rizuan Mohd Razlan, Norazah Abd Rahman, Woei Jye Lau, Mohd Hafiz Dzarfan Othman, Ahmad Fauzi Ismail, Tutuk Djoko Kusworo, Anwar Ul-Hamid
Summary: In this study, the performance of membrane distillation (MD) was improved by coating MoS2-TiO2 on a PVDF-based hollow fiber membrane. The MoS2-TiO2/PP20 membrane showed enhanced hydrophobicity and porosity, leading to significantly improved MD performances. This work suggests that the MoS2-TiO2 coating can overcome the typical permeability/rejection rate trade-off effect and play a significant role in enhancing MD performances.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Engineering, Environmental
Nur Fajrina, Norhaniza Yusof, Ahmad Fauzi Ismail, Farhana Aziz, Muhammad Roil Bilad, Meshel Alkahtani
Summary: This article summarizes recent developments in membrane technology tailored for biogas upgrading, including the structure and classification of membrane materials as well as effective approaches to overcome the trade-off between permeability and selectivity. Additionally, other challenges are comprehensively discussed, and future research required to tackle biogas upgrading issues is projected.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
