Article
Engineering, Chemical
Peng Ge, Zhen Lin, Jiarui Yang, Chuan Hu, Qinglin Liu, Qiugen Zhang
Summary: This article presents a facile strategy to fabricate polyethylenimine-grafted polyethersulfone hollow fiber membranes (PSF-PEI HFMs) for efficient dye separation. Unlike traditional interfacial polymerization, these HFMs were directly prepared via quaternization of PEI with brominated polyethersulfone UF HFMs. The PSF-PEI HFMs exhibit ultra-high water permeance and outstanding rejection for dyes, while maintaining low rejections for inorganic salts. Additionally, they show excellent stability and antifouling abilities, making them highly promising for industrial applications in fast dye separation.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Environmental
Yanran Lu, Wen Zhang, Mei Wang, Hua Zhang, Jiahui Li, Wenhao Luo
Summary: A chitosan-modified graphene oxide/polyacrylonitrile nanofiber membrane was prepared for adsorbing dyes in wastewater, demonstrating high adsorption capacity, easy operation, and good reusability.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Engineering, Chemical
Rifan Hardian, Abdulaziz Alammar, Tibor Holtzl, Gyorgy Szekely
Summary: Membrane technologies have shown promise as an energy-efficient alternative for separation processes in various industries. This study focuses on the fabrication of oil and solvent-resistant nanofiltration membranes using cellulose and chitosan blends. The membranes exhibited outstanding separation performance and chemical stability, even in harsh solvents. By adjusting the cellulose-chitosan ratio, the molecular sieving properties of the membranes could be fine-tuned. The membranes also showed biodegradation potential, contributing to the sustainable lifecycle of membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Laili Azmiati Arni, Ahmad Hapiz, Ali H. Jawad, Ahmed Saud Abdulhameed, Zeid A. ALOthman, Lee D. Wilson
Summary: A novel nanohybrid composite of magnetic chitosan-salicylaldehyde/nanoclay (MCH-SAL/NCLA) was synthesized through hydrothermal method for the removal of acid red 88 (AR88) from simulated wastewater. Response surface methodology combined with the Box-Behnken design (RSM-BBD) was used to evaluate the impact of adsorption variables on AR88 dye adsorption. The MCH-SAL/NCLA composite exhibited a maximum adsorption capacity of 173.5 mg/g for AR88 dye. It was found that the adsorption of AR88 onto the MCH-SAL/NCLA surface was influenced by various processes including electrostatic, hydrogen bonding, n-& pi;, and n-& pi; interactions. This study demonstrated that MCH-SAL/NCLA can be an effective bio-adsorbent for the removal of azo dye from contaminated wastewater.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Chemical
Xiaogeng Lin, Li Chen, Chang Chen, Jianqing Rao, Jianhua Chen, Yasan He
Summary: This study focuses on the development of highly crystalline COF powders and their assembly with chitosan to construct precise-sieving membranes. The membranes exhibit precise rejection to various dyes, while allowing ultrafast permeance. The study provides a significant concept and strategy for the preparation of high precise-sieving COF membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Environmental
Muhamad Zulhilmi Zailani, Ahmad Fauzi Ismail, Pei Sean Goh, Siti Hamimah Sheikh Abdul Kadir, Mohd Hafiz Dzarfan Othman, Hasrinah Hasbullah, Mohd Sohaimi Abdullah, Be Cheer Ng, Fatmawati Kamal, Ruslinda Mustafar
Summary: In this study, immobilizing chitosan nanoparticles on polysulfone membranes improved transport properties and uremic toxins removal capabilities. Spinning conditions were found to play a critical role in dictating the properties of the nanocomposite hollow fiber membrane.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Polymer Science
Ahmed A. Alshahrani, Abeer A. El-Habeeb, Noor H. Alotaibi, Anfal A. Shaman, Wajd F. Almutairi, Samar M. Alotaibi, Hassan M. Hassan, Ibrahim Hotan Alsohaimi
Summary: Nanofiltration membranes were successfully fabricated using multi-walled carbon nanotubes, and the type of carbon nanotubes used significantly influenced the membrane characteristics. The introduction of carbon with carboxylic or amine groups altered the surface morphology of the membranes. Additionally, membranes modified with carboxylic groups exhibited higher water permeability.
Article
Biochemistry & Molecular Biology
Asuncion M. Hidalgo, Maria Gomez, Maria D. Murcia, Gerardo Leon, Beatriz Miguel, Israel Gago, Pilar M. Martinez
Summary: This paper studied the treatment effect of polysulfone nanofiltration membrane coated with graphene oxide (GO) and reduced graphene oxide (RGO) on ibuprofen solutions. The results showed that the coated membranes had higher rejection values than the uncoated membrane, and the latter performed better in terms of permeability, selectivity, and fouling.
Article
Polymer Science
Weibin Cai, Mingqian Wang, Gary Q. Yang, Jiding Li
Summary: Due to water shortages, people have to use membrane-based technologies like desalination nanofiltration (NF) membranes to produce high-quality water from wastewater, seawater, and brackish groundwater. Researchers have successfully developed double-high-performance NF membranes using novel strategies, which have both high water permeabilities and high selectivities. These membranes, coated with self-assembled polydopamine on the surface, demonstrate improved water permeability and can alleviate membrane fouling.
Article
Chemistry, Physical
R. M. Waliullah, Ariyan Islam Rehan, Mrs Eti Awual, Adiba Islam Rasee, Md. Chanmiya Sheikh, Md. Shad Salman, Mohammed Sohrab Hossain, Md. Munjur Hasan, Khadiza Tul Kubra, Md. Nazmul Hasan, Hadi M. Marwani, Aminul Islam, Mohammed M. Rahman, Md. Abdul Khaleque, Md. Rabiul Awual
Summary: In this study, chitosan-treated nanocomposite was used as an effective adsorbent to remove methyl orange dye from contaminated water. The introduction of chitosan improved the adsorption capacity and rate effectively, and the nanocomposite adsorbent exhibited high reusability. Therefore, chitosan-based fibrous nanocomposite adsorbent is expected to become one of the best candidate materials for future industrial wastewater treatment.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Materials Science, Paper & Wood
Ahmed H. Orabi, Ahmed E. Abdelhamid, Hend M. Salem, Doaa A. Ismaiel
Summary: The new composite membranes of polysulfone/cellulose acetate incorporated with pre-synthesized chitosan grafted p-phenylenediamine showed efficient uranium adsorption capabilities with good stability and reusability in waste water treatment.
Article
Environmental Sciences
Jenny Nambikkattu, Noel Jacob Kaleekkal, Joel Parayil Jacob
Summary: This study successfully addressed the issue of removing glucose from effluents in food, fermentation, and sugar industries, while ensuring compliance with COD standards for water discharge. By incorporating MgFe2O4 and ZnFe2O4 nanoparticles, the thin-film nanocomposite membranes achieved a glucose rejection rate of 96.52%.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Zeng Wei Heng, Yee Yen Tan, Woon Chan Chong, Ebrahim Mahmoudi, Abdul Wahab Mohammad, Hui Chieh Teoh, Lan Ching Sim, Chai Hoon Koo
Summary: This study demonstrated the modification of polysulfone membrane with carbon dots and silica to enhance its permeability and dye rejection. The modified membranes showed improved pore size, hydrophilicity, and negative surface charge, with a significant increase in permeability for 1.0 wt% CD/SiO2 loading. Notably, the 2.5 wt% CD/SiO2 membrane exhibited the highest dye removal compared to the pure PSf membrane.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Chemical
Jiao Meng, Yan Xie, Yi-Hang Gu, Xi Yan, Yan Chen, Xiao-Jing Guo, Wan-Zhong Lang
Summary: The PVDF-CaAlg NF membranes are prepared by crosslinking sodium alginate solution, exhibiting a compact structure and superior surface hydrophilicity. They show high rejection rates for various dyes, with rejection rates slightly increasing with prolonged impregnation time, and stable permeation flux in long-term filtration. Additionally, these membranes demonstrate good anti-fouling performance to BSA protein and lactobacillus.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Nikita Gupta, Z. V. P. Murthy
Summary: The study showed that ZIF-67 can enhance the pure water flux of polysulfone membranes, but a high concentration of ZIF-67 in the membrane may lead to a decrease in salt rejection and permeate collection.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Physical
Lingling Peng, Wansen Tan, Yuting Lu, Ayan Yao, Dayuan Zheng, Le Li, Jingran Xiao, Lijun Li, Qingbiao Li, Shu-feng Zhou, Guowu Zhan
Summary: In this study, alpha-L-Rhamnosidase (Rha) was successfully immobilized using metal-organic frameworks, with Rha@Ce-BTC showing the highest enzymatic activity and 80% residual activity. The enzyme-substrate affinity and catalytic efficiency of Rha@Ce-BTC were significantly enhanced compared to free Rha, as supported by kinetic studies.
Article
Engineering, Chemical
Zhongliang Huang, Yujia Yuan, Miaomiao Song, Zhimian Hao, Jingran Xiao, Dongren Cai, Abdul-Rauf Ibrahim, Guowu Zhan
Summary: The study demonstrates the importance of Pt/Ni ratio in determining the product selectivity in CO2 hydrogenation. Methane becomes the major product only when the Ni/Pt ratio is increased to 9. The enrichment of Pt on the catalyst surface is crucial for improving catalytic performance and stability.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Dayuan Zheng, Dan Hua, Xi Cheng, Junyang Pan, Abdul-Rauf Ibrahim, Haiming Hua, Peng Zhang, Xingwen Cha, Kaiji Xu, Guowu Zhan
Summary: In this study, thin-film composite membranes consisting of poly(m-phenyleneisophthalamide) substrate and polyamide active layer were constructed using transition metal ion-assisted interfacial polymerization method. These membranes showed improved performance compared to traditional polyamide membranes in organic solvent nanofiltration, with a thinner polyamide layer and higher permeability. The addition of Co2+ ion also enhanced the membranes' tolerance to organic solvents and long-term stability. This research has great potential and sustainability for practical organic solvent nanofiltration applications.
Article
Engineering, Chemical
Kok Bing Tan, Pan Tian, Xinxin Zhang, Jian Tian, Guowu Zhan, Jiale Huang, Qingbiao Li
Summary: The present study developed a bifunctional catalyst for CO2 hydrogenation into dimethyl ether (DME) using a green and low-cost synthesis method. The catalyst consists of Pd/In2O3 for CO2 hydrogenation into methanol and H-ZSM-5 for methanol dehydration into DME. The optimized catalyst showed high selectivity and stability in the production of DME.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Yang Zhang, Guowu Zhan, Yibo Song, Yiping Liu, Jiale Huang, Shu-Feng Zhou, Kok Bing Tan, Qingbiao Li
Summary: This study proposes a new strategy for utilizing petrochemical-derived carbon black waste to fabricate vanadate nanomaterials. By adding foreign cations, two rare-earth vanadates were successfully synthesized. These nanomaterials exhibit good physicochemical properties and demonstrate excellent catalytic activity in the semi-hydrogenation reaction.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Liangliang Zhang, Tingjun Fu, Kun Ren, Yating Han, Ran Wang, Guowu Zhan, Zhong Li
Summary: This study proposes a new strategy to control the alkylation depth by regulating the methanol concentration, leading to stable production of light aromatics. By using a dual bed system and introducing part of the methanol, the toluene selectivity is reduced while the xylene and BTX selectivity are improved.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Bo Jiang, Mingzhen Huang, Dongren Cai, Kok Bing Tan, Guowu Zhan
Summary: In this study, supported Pt/Co3O4 nanocatalysts for CO oxidation were prepared using a biological template method. It was found that base etching of the pollen template favored the deposition of Co(OH)2 and the formation of Co3O4 after calcination. The Pt/bio-Co3O4-BB supported catalyst, prepared through twice base etching treatments, exhibited excellent catalytic activity, converting CO to CO2 at 70°C. The base treatments promoted the formation of oxygen vacancies and increased the Pt0/Pttotal surface ratio, enhancing CO adsorption.
CATALYSIS COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Lu Long, Kaiji Xu, Kok Bing Tan, Dongren Cai, Yucheng Yang, Shu-Feng Zhou, Guowu Zhan
Summary: This study 3D-printed monolithic agitating paddles with different geometries and investigated their effect on the degradation efficiency of organic dyes. The results showed that the 3D-printed grid with higher cell density exhibited better liquid mixing efficiency and catalytic performance.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Chemical
Yunpeng Shen, Ayan Yao, Jinyang Li, Dan Hua, Kok Bing Tan, Guowu Zhan, Xiaoping Rao
Summary: A novel method using sonication-assisted potassium fulvic acid (PFA) was applied to obtain few or monolayer MXene, which was then integrated into commercial P84 polymeric matrices to fabricate mixed matrix membranes (MMMs) for organic solvent nanofiltration (OSN) applications. The resulting MMMs showed improved ethanol permeability without sacrificing BBR rejection, and exhibited excellent OSN performance in other organic solvents. The dispersive MXene has great potential for practical OSN applications. Rating: 9/10
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Mingzhen Huang, Siyuan Hu, Dongren Cai, Guowu Zhan
Summary: Using in-situ doping metal-organic frameworks as precursors, highly dispersed polymetallic oxides were prepared. The study synthesized straw-like W/Cu/Ce trimetallic oxides using phosphotungstic ionic liquid@Ce-based metal-organic frameworks absorbing copper acetylacetonate as precursors. The effect of W content on the catalytic activity for CO oxidation was investigated.
MATERIALS TODAY CHEMISTRY
(2023)
Review
Engineering, Environmental
Kok Bing Tan, Kaiji Xu, Dongren Cai, Jiale Huang, Guowu Zhan
Summary: Bifunctional catalysts containing metal/metal oxide and zeolites have attracted significant attention for their ability to convert CO2 or CO into value-added fuels or chemicals. The integration manner and interaction distance between the two components greatly impact productivity. A rational design approach has been proposed to guide catalyst selection and address existing challenges, as well as potential development of trifunctional catalysts. Recent research highlights the importance of rational design for CO and CO2 hydrogenation, enabling sustainable production of value-added products while mitigating global warming.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Junyang Pan, Dan Hua, Yiping Hong, Xi Cheng, Fangsong Guo, Kok Bing Tan, Ziqi Zhong, Guowu Zhan
Summary: A hybrid photocatalytic membrane (g-C3N4/GO/MCE) was designed by a vacuum-filtration-assisted assembling method, which exhibited excellent photocatalytic activity and photocatalysis-filtration performance. It consisted of g-C3N4 nanosheets as a top layer, GO nanosheets as an interlayer, and MCE as a substrate layer. This membrane showed high permeance, solute removal, and stability under visible-light irradiation, making it promising for wastewater treatment and water purification applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Physical
Dongren Cai, Yanmei Cai, Kok Bing Tan, Guowu Zhan
Summary: This review systematically summarizes the recent experimental and theoretical studies on indium oxide (In2O3)-based catalysts for thermochemical CO2 hydrogenation to methanol. It reveals that the formation of oxygen vacancies on the In2O3 surface can inhibit side reactions and ensure high selectivity. The catalytic mechanism and strategies to improve catalytic performance are comprehensively explored.
Article
Chemistry, Physical
Ziqi Zhong, Guowu Zhan, Borui Du, Xinxin Lu, Zihang Qin, Jingran Xiao
Summary: This study demonstrates that Ti and Pt co-doping can improve the PEC performance of the a-Fe2O3 photoanode. The best performance is achieved by in-situ Ti ex-situ Pt doping. Ti doping in bulk facilitates charge separation while Pt doping on the surface accelerates charge transfer. However, Ti doping on the surface inhibits charge separation and Pt doping in bulk hinders charge separation and transfer. HCl treatment further improves the performance but can induce lattice defects that hinder the charge transport.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Xingwen Cha, Xueying Wang, Mingzhen Huang, Dongren Cai, Kang Sun, Jianchun Jiang, Shu-feng Zhou, Guowu Zhan
Summary: In this study, different elements (Pr, Cu, or N) doped CeO2 supports were synthesized using Ce-based metal-organic frameworks (MOFs) as precursors via calcination treatment. The obtained CeO2 supports were used to load Pt nanoparticles and showed enhanced catalytic activity for CO oxidation compared to undoped catalysts. Density functional theory calculations with on-site Coulomb interaction correction were performed to provide atomic-scale insights, revealing that element-doped catalysts can reduce the adsorption energies of CO and lower reaction energy barriers.
DALTON TRANSACTIONS
(2023)
