Article
Engineering, Environmental
Basak Keskin, Ismail Koyuncu
Summary: The extraction of methylene orange dye and humic acid organic matter solution was studied using polymer inclusion membrane (PIM). The PIM was composed of PVC, CTA, TOA, and A336. The PIM-6 membrane with 40 wt% PVC, 40 wt% A336, and 20 wt% TOA exhibited the highest removal efficiency for dye (93.57%) and organic matter (86.03%).
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Water Resources
Nadjib Benosmane, Baya Boutemeur, Safouane M. Hamdi, Maamar Hamdi
Summary: In this study, polymer inclusion membranes (PIMs) containing Cellulose triacetate as polymer base, 2-NPOE as a plasticizer, and Calix[4]resorcinarene (RC8) as a carrier were prepared and characterized. The content of the carrier and plasticizer in the membrane were found to significantly affect the properties of PIMs. The membrane showed better stability under optimum conditions, and the transport of Methylene Blue (MB) dye followed the first-order kinetics equation.
APPLIED WATER SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Roshni D. Hingrajiya, Manish P. Patel
Summary: The present research focuses on the fabrication and characterization of magnetic Fe3O4 incorporated chitosan grafted acrylamide and N-vinylimidazole composite hydrogels (CANFe-1 to CANFe-7). The swelling study showed that CANFe-4 had the highest swelling efficiency, thus it was chosen for the subsequent removal studies. The pH sensitive adsorptive removal of cationic dye (methylene blue) was dominant at pH = 8, with a maximum adsorption capacity of 860 mg/g. The CANFe-4 composite hydrogel can be conveniently separated from the solution using an external magnet, making it a promising adsorbent for wastewater treatment.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Shuyang Chen, Mei Zhang, Hanjie Chen, Ying Fang
Summary: In this study, raw talc powder was surface modified using two different methods: acid washing and ball milling. XRD, FTIR, and SEM were used to characterize the modified talc. Adsorption experiments were conducted using methylene blue (MB) as the target contaminant, and the findings showed that both modifications increased the adsorption capacity of talc. The results indicate that modified talc can be an inexpensive and abundant candidate material for dye adsorption in industrial wastewater.
Article
Green & Sustainable Science & Technology
Thays de Oliveira Guidolin, Natalia Morelli Possolli, Mariana Borges Polla, Tiago Bender Wermuth, Tiago Franco de Oliveira, Sarah Eller, Oscar Rubem Klegues Montedo, Sabrina Arcaro, Maria Alice Prado Cechinel
Summary: Magnetite nanoparticles synthesized by the sol-gel citrate-nitrate method were used for the degradation of methylene blue in a simulated aqueous solution. Experimental design and statistical analysis determined that nanoparticle concentration was the most significant parameter, with the highest concentration experiment achieving the most effective degradation in 210 minutes. Time-depended photodegradation was monitored, showing the excellent performance of the photocatalytic system.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Wei Gao, Yufeng Li, Jitao Zhao, Zhe Zhang, Weiwei Tang, Jun Wang, Zhenyu Wu
Summary: Reduced graphene oxide (rGO)/TiO2 nanocomposites, synthesized through a hydrothermal technique, were used as photocatalysts to effectively degrade methylene blue (MB) in industrial dyestuff wastewater. The degradation efficiency of the nanocomposites for MB was as high as 98.18% at 5wt.% rGO content, 0.4 g L-1 rGO/TiO2 content, pH 6, and 60 mg L-1 MB concentration. The photocatalytic degradation mechanism involved immediate oxidative degradation and the combined action of O-2(center dot-), OH(center dot), and h(+) species. The degradation kinetic of the nanocomposites for MB followed a first-order model under UV irradiation.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Chemistry, Multidisciplinary
Linda Hevira, Zilfa, Rahmayeni, Joshua O. Ighalo, Hermansyah Aziz, Rahmiana Zein
Summary: This study demonstrated that using Terminalia catappa shells as biosorbent can effectively remove methylene blue from aqueous solutions, with a maximum adsorption capacity of 88.62 mg g(-1), and is applicable to real wastewater samples, which can be reused multiple times.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Environmental Sciences
Ahmed Abutaleb, Mohd Imran, Nasser Zouli, Afzal Husain Khan, Shahir Hussain, Mohammad Ashraf Ali, Omer Bakather, Mohammad Ashraf Gondal, Nadeem A. Khan, Hitesh Panchal, Sasan Zahmatkesh
Summary: The contamination of water due to the presence of dyes is a serious health problem that requires treatment. A tailored co-precipitation technique was successfully used to prepare Fe3O4-multiwalled Carbon Nanotubes (MWCNTs)-Bentonite nanocomposite. The synthesized nanocomposite showed high adsorption capacity and was determined to be a promising candidate for water treatment.
Article
Chemistry, Physical
Maryam Mohammadikish, Behzad Zaeemdar
Summary: Fe3O4@CP nanocomposite with core-shell structure showed efficient adsorption of methylene blue, with over 86% removal after 2 minutes. The nanocomposite could be easily separated magnetically and reused without significant loss of adsorption efficiency after four cycles.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Thuong Thi Nguyen, Bich Ngoc Hoang, Thuan Van Tran, Dai Van Nguyen, Duy Nguyen Trinh, Dai-Viet N. Vo
Summary: The study introduced a method of preparing AMP-MMT composites for dye adsorption, exhibiting high adsorption capacity, recyclability, and potential application in water purification. The mechanisms, operating parameters, and performance of the composite membrane were investigated, providing insights into eco-friendly and biodegradable materials for environmental protection.
SURFACES AND INTERFACES
(2021)
Article
Nuclear Science & Technology
Yang Zeng, Guoyuan Yuan, Tu Lan, Feize Li, Jijun Yang, Jiali Liao, Yuanyou Yang, Ning Liu
Summary: A zirconium phosphate mesoporous coordination polymer Zr-EDTMPA was synthesized and characterized, and its performance for Co(II) removal from aqueous solution was investigated. The results showed that Zr-EDTMPA exhibited excellent sorption capacity and reusability, with the sorption mechanism mainly attributed to the strong coordination between cobalt and the untapped hydroxyl functional groups on Zr-EDTMPA.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Suhad Abdulrahman Yasin, Samie Yaseen Sharaf Zeebaree, Aymn Yaseen Sharaf Zeebaree, Osama Ismail Haji Zebari, Ibtisam Abdulmajeed Saeed
Summary: The research investigates the application of green methods in producing nanocomposites, utilizing electrospinning techniques and natural plant extract to synthesize copper nanoparticles. The produced CuO/PET nanocomposites exhibit high surface area, well-distributed elements, and efficient photocatalytic removal of toxic dyes in aqueous solutions. The study demonstrates that the photocatalytic efficiency for removing dyes is achieved in a short time under low-intensity UV light irradiation.
Article
Chemistry, Inorganic & Nuclear
Roula Abi Saad, Ghassan Younes, Mohammad H. El-Dakdouki, Rami Al-Oweini
Summary: This study evaluated the effectiveness of three vanadium-substituted polyoxomolybdates for removing methylene blue dye from aqueous solutions, showing high removal efficiency towards the cationic dye. Optimized conditions revealed varying contact times for each material at 25 mg/L methylene blue, indicating the suitability of acid pH values.
JOURNAL OF CLUSTER SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Youssef Ettahiri, Lahcen Bouna, John Hanna, Abdeljalil Benlhachemi, Hannah L. Pilsworth, Abdessalam Bouddouch, Bahcine Bakiz
Summary: This study synthesized and characterized porous geopolymer systems using a naturally occurring Moroccan pyrophyllite clay. The geopolymer matrix was formed through alkaline activation of metakaolin, with little contribution from pyrophyllite. Pyrophyllite played a role in promoting the formation of disordered and heterogeneous geopolymers and pores. The structures and morphologies of the raw clay, calcined meta-pyrophyllite, and prepared geopolymer samples were analyzed using various techniques. The specific surface area and pore volume of the geopolymer samples significantly increased compared to the raw clay. Adsorption experiments showed that the chemisorption of MB molecules onto the geopolymer specimen was spontaneous, irreversible, and endothermic, with a high quantity of adsorbed molecules.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Dalia Abdrabou, Mohamed Ahmed, Ali Hussein, Tharwat El-Sherbini
Summary: Efficient cleaning of contaminated water by photocatalysis has become an important strategy for environmental protection. The combination of CdS with Gd2O3 and GO has been found to enhance the photocatalytic efficiency. Under visible light irradiation, the removal efficiency of Gd2O3@CA, CdS/Gd2O3@CA, and CdS/Gd2O3/GO@CA is 41.02%, 54.71%, and 71.42%, respectively.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Matthew R. Crawley, Daoyang Zhang, Amanda N. Oldacre, Christine M. Beavers, Alan E. Friedman, Timothy R. Cook
Summary: This study focused on assembling eight cofacial porphyrin prisms using MTPyP and functionalized ruthenium-based molecular clips, demonstrating significant improvement in catalytic rate constant k(s) and selectivity for the 4e(-)/4H* reduction of O-2 to H2O. The role of steric bulk of the clip in the structural dynamics of these prisms, which modulates the ORR reactivity with respect to selectivity and kinetics, was highlighted.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Vincent J. Pastore, Meghan G. Sullivan, Javid Rzayev, Timothy R. Cook
Summary: A series of new polymer-inorganic composites have been synthesized using a postsynthetic ligand exchange strategy from poly(amic acid) and various M-MOF-74 frameworks. This method has shown versatility in exchanging ligands with several additional metal ions and frameworks containing 2,5-dihydroxyterephthalate ligands, expanding the application of polymer-ligand exchange hybridization.
JOURNAL OF COORDINATION CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Gregory E. Sokolow, Matthew R. Crawley, Daniel R. Morphet, Didar Asik, Joseph A. Spernyak, A. J. Robert McGray, Timothy R. Cook, Janet R. Morrow
Summary: A metal-organic polyhedron with four paramagnetic Fe(III) centers was studied as an MRI probe and showed significant enhancement in solution. In vivo studies demonstrated strong contrast enhancement and accumulation of the polyhedron.
INORGANIC CHEMISTRY
(2022)
Article
Engineering, Chemical
Taliehsadat Alebrahim, Alisa Chakraborty, Leiqing Hu, Shalin Patil, Shiwang Cheng, Durga Acharya, Cara M. Doherty, Anita J. Hill, Timothy R. Cook, Haiqing Lin
Summary: Model systems are developed to investigate the effect of polyether-metal ion interactions on gas separation characteristics. Increasing the salt content generally decreases gas diffusivity and permeability, but low loadings of certain salts can increase gas permeability without affecting selectivity.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Daoyang Zhang, Matthew R. Crawley, Amanda N. Oldacre, Lea J. Kyle, Samantha N. MacMillan, Timothy R. Cook
Summary: Cofacial porphyrin catalysts synthesized via coordination-driven self-assembly were evaluated for their activity in the Oxygen Reduction Reaction (ORR). It was found that the structures of the catalysts, formed by different coordination patterns, showed significant differences in selectivity and reactivity. This study highlights the potential of coordination-driven self-assembly for tuning dinuclear catalysts.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Lauren E. Rosch, Matthew R. Crawley, Ryan M. O'Donnell, Thomas N. Rohrabaugh, Trenton R. Ensley, Thomas A. Sobiech, Timothy R. Cook
Summary: Despite 40 years of research on photophysical properties, significant gaps remain in understanding chalcogenopyrylium polymethine dyes. This study fills in these gaps through experiments on a family of dyes, revealing that structural and electronic changes can affect the photophysics of these dyes. The excited states of these dyes have short lifetimes with rapid relaxation processes, and they do not exhibit any triplet transient processes. Additionally, rotation of the pyran ring about the methine backbone is a critical factor that distinguishes the dynamics of these dyes from more rigid analogues.
Article
Engineering, Environmental
Ronghao Yang, Yan Zhou, Hedong Bian, Gang Cheng, Yuzhen Zhang, Chi-Ming Che, Timothy R. Cook, Yunjun Shen
Summary: The use of ligands with pendant closo-monocarborane clusters can neutralize the positive charge of luminescent complexes and enhance photophysical properties. In this study, four Pt(II) complexes with a monoanionic closo-monocarborane were synthesized and characterized. These complexes exhibit interesting photophysical behaviors, with complex 1a showing a high photoluminescent quantum yield and achieving a relatively high external quantum efficiency in OLED devices.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Yunjun Shen, Xiangjun Kong, Fengjie Yang, He-Dong Bian, Gang Cheng, Timothy R. Cook, Yuzhen Zhang
Summary: This study presents a novel platinum triplet emitter that emits blue light in both solid-state and solution states. The complex 4a exhibits the highest luminous efficiency when dispersed in a PMMA matrix. A deep-blue OLED containing 4a as the light-emitting dopant demonstrates blue photoluminescence and a maximum external quantum efficiency of 6.2%.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Meghan G. Sullivan, Gregory E. Sokolow, Eric T. Jensen, Matthew R. Crawley, Samantha N. MacMillan, Timothy R. Cook
Summary: The chemistry of zirconium-based metal-organic polyhedra (ZrMOPs) is often limited by their poor solubilities. We explored a new method for ZrMOP functionalization via node-modification, and found that it could influence solubility.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Heshali K. Welgama, Matthew R. . Crawley, James R. . McKone, Timothy R. . Cook
Summary: Prussian blue and its analogues have potential for electrochemical energy storage, but their use in flow-type devices is limited due to the lack of redox responsiveness in colloidal suspensions. Our study investigated the redox chemistry of amine functionalization of Prussian blue and its Cu analogue. The results highlight the importance of developing materials with redox activity and stability for practical applications.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Matthew R. Crawley, Daoyang Zhang, Timothy R. Cook
Summary: This work reports the synthesis of a hexa-porphyrin cube, which can catalyze the electrochemical reduction of molecular oxygen to hydrogen peroxide. By exploiting post-synthetic modification and structural control through coordination-driven self-assembly, the efficient generation of hydrogen peroxide is achieved.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Vincent J. Pastore, Meghan G. Sullivan, Heshali K. Welgama, Matthew R. Crawley, Alan E. Friedman, Clayton Rumsey, Martin Trebbin, Javid Rzayev, Timothy R. Cook
Summary: One way to modify metal-organic polyhedra (MOPs) is by adding functional groups to the organic bridging ligands. This allows for coupling reactions to enhance the architecture. In this study, a reactive norbornene-based MOP was formed through a one-pot tandem coordination-driven self-assembly/Diels-Alder reaction. Further modification of the MOPs was achieved through thiol-ene click chemistry, resulting in the formation of functionalized MOPs or polymer/MOP hybrid composites.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Mamta Dagar, Molly Corr, Timothy R. Cook, James R. McKone, Ellen M. Matson
Summary: We investigate the impact of solvent on the rates of electron transfer in heterometallic charge carriers and find that a 1:4 v/v mixture of propylene carbonate and acetonitrile can significantly increase the rate of electron transfer for one electron oxidation compared to pure acetonitrile. Additionally, the one electron reduction process also shows a two-fold increase in rate in the mixture. This behavior is attributed to solvent-solvent interactions that deviate from ideal solution behavior. The results highlight the importance of solvent in improving electron transfer kinetics and provide a way to systematically tune solvent composition for faster charge transfer.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Inorganic & Nuclear
Daoyang Zhang, Matthew R. R. Crawley, Ming Fang, Lea J. J. Kyle, Timothy R. R. Cook
Summary: We report the electrocatalytic Oxygen Reduction Reaction on a rigid Co(ii) porphyrin prism scaffold bridged by Ag(i) ions. The reactivity of this scaffold differs significantly from previous prism catalysts in that its selectivity is similar to that of monomer yet it displays sluggish kinetics, which is responsible for these differences.
DALTON TRANSACTIONS
(2022)
Review
Chemistry, Multidisciplinary
Jiong Zhou, Lang Rao, Guocan Yu, Timothy R. Cook, Xiaoyuan Chen, Feihe Huang
Summary: Nanotheranostics is the next generation of personalized medicine aiming to improve cancer patients' survival rate and quality of life. Supramolecular cancer nanotheranostics have advantages in early diagnosis and personalized therapy with promising potential in clinical applications.
CHEMICAL SOCIETY REVIEWS
(2021)
