Article
Materials Science, Multidisciplinary
Mona Alleshagh, Samahe Sadjadi, Hassan Arabi, Naeimeh Bahri-Laleh, Eric Monflier
Summary: A novel catalytic composite was designed using the synergism between chitosan and halloysite for promoting hydrogenation of PAO oils; by optimizing reaction conditions and investigating the effect of catalyst composition on performance, high yield of hydrogenated product was achieved; the high recyclability and heterogeneous nature of the catalyst were confirmed in the experiments, and the positive effect of hybridization of halloysite and chitosan on catalytic activity was also validated.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Applied
Cristian H. Campos, Krishnamoorthy Shanmugaraj, Tatiana M. Bustamante, Edgardo Leal-Villarroel, Victor Vinoth, Radhamanohar Aepuru, Ramalinga Viswanathan Mangalaraja, Cecilia C. Torres
Summary: Pt-nanoparticles supported on halloysite-nanotubes were selectively deposited onto the inner or outer surface to evaluate their stability and catalytic performance for hydrogenation reactions. Pt(IN)/HNT catalyst showed better performance and stability compared to Pt(OUT)/HNT, with the latter retaining catalytic activity after 15 cycles.
Article
Chemistry, Multidisciplinary
Min Hu, Xia Wang, Yujing Tang, Xingyue He, Hongdou Shen, Hui Pan, Yinghui Shang, Dongbei Wu, Shengcai Zheng, Qigang Wang
Summary: A photo-enzyme-coupled hydrogel platform with spatio-temporally controlled hydrogel network was constructed through photoenzymatic-initiated radical polymerization, allowing for photo-switchable redox performance. The platform was shown to modulate bidirectional oxidation/antioxidant effects for complicated wound healing and provides ideas for enzyme engineering design.
Article
Chemistry, Multidisciplinary
Alireza Bayat, Samahe Sadjadi, Hassan Arabi, Naeimeh Bahri-Laleh
Summary: A composite material composed of halloysite clay and ionic liquid is reported in this study, which can be used for both oligomerization and hydrogenation processes. The PAO obtained from this catalytic system exhibits a uniform microstructure and high performance. The palladated composite shows good catalytic activity and recyclability.
RESEARCH ON CHEMICAL INTERMEDIATES
(2022)
Article
Chemistry, Physical
Samahe Sadjadi, Fatemeh Koohestani, Gerard Pareras, Mehdi Nekoomanesh-Haghighi, Naeimeh Bahri-Laleh, Albert Poater
Summary: The study identified the optimum heterocyclic ligand for the decoration of halloysite support through computational methods, and investigated its performance in interaction with Pd nanoparticles. The catalyst prepared with ionic liquid exhibited superior activity in hydrogenation reactions, showing high recyclability and stability.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Environmental Sciences
Yuhang Li, Hui Cao, Wenli Liu, Pengtao Liu
Summary: In this study, a PVA/CNF/Fe3O4 hybrid hydrogel was prepared using the in-situ co-precipitation method. The hybrid hydrogel showed high efficiency in catalytic degradation of tetracycline.
Article
Multidisciplinary Sciences
Lei Zhang, Zhe Chen, Zhenpeng Liu, Jun Bu, Wenxiu Ma, Chen Yan, Rui Bai, Jin Lin, Qiuyu Zhang, Junzhi Liu, Tao Wang, Jian Zhang
Summary: Electrocatalytic acetylene semihydrogenation using N-heterocyclic carbene-copper as a catalyst shows high selectivity and performance, suppressing side reactions and achieving faradaic efficiencies >= 98% in pure acetylene flow. This new catalyst outperforms currently reported thermocatalysts with specific selectivity >99%, continuous ethylene production with low acetylene content, high space velocity up to 9.6 x 10^5 mL.g(cat)^(-1).h^(-1), and a turnover frequency of 2.1 x 10^(-2) s^(-1) in a 100-hour stability test.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Samahe Sadjadi, Fatemeh Koohestani
Summary: Cl-functionalized halloysite nanoclay was modified to prepare a hybrid catalyst for the hydrogenation of nitro compounds. The catalyst showed high selectivity towards the hydrogenation of nitro group and could produce high yields of hydrogenated products at ambient temperature and low pressure. Recycling experiments demonstrated that the catalyst could maintain its activity with slight Pd leaching.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Engineering, Chemical
Deng Pan, Yanan Wang, Han Li, Yuzhe Zhang, Qian Liang, Man Zhou, Zhongyu Li, Song Xu
Summary: The catalyst Co/CeO2 prepared by Ce-MOF and ZIF-67 precursor demonstrates efficient photothermal CO2 methanation, with high methane and carbon monoxide yields, as well as selectivity and catalytic durability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Biochemistry & Molecular Biology
Silvia Buonvino, Matteo Ciocci, Dror Seliktar, Sonia Melino
Summary: Hydrogen sulfide (H2S) has been found to mitigate the cellular toxicity caused by photo-polymerization during the formation of hydrogels. By exposing cells to slow release H2S treatment using pre-conditioning with glutathione-conjugated-garlic extract, cell survival rates during the photo-polymerization process can be improved.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Physical
Yang-Fan Xu, Athanasios A. Tountas, Rui Song, Jessica Ye, Jun-Hua Wei, Shufang Ji, Lily Zhao, Wenzhe Zhou, Jing-Hua Chen, Guanshu Zhao, Xiangdong Yao, Mohini M. Sain, Dai-Bin Kuang, Geoffrey A. Ozin
Summary: The limitations of traditional methanol synthesis can be overcome by utilizing photons, which can shift the thermodynamic equilibrium and significantly increase the methanol production rate and selectivity. This discovery highlights the advantages of using light in the synthesis of green methanol and provides insights into regulating reaction pathways through light intensity and wavelength.
Article
Chemistry, Physical
Ying-Ying Wei, Shuang-Shuang An, Si Sun, Yong Jiang
Summary: This study found that there is a significant difference in surface wettability between silicone hydrogels prepared by thermal and photo-initiation, which can be explained by the distinct surface morphologies.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Biochemistry & Molecular Biology
Giuseppe Cavallaro, Lorenzo Lisuzzo, Giuseppe Lazzara, Stefana Milioto
Summary: The design of hydrogels for controlled release of active species is challenging yet attractive. In this study, hybrid hydrogels composed of halloysite nanotubes and alginate were prepared, featuring a unique wire-like shape. The interaction between the morphology and dimensions of the hydrogel wires was found to significantly affect the release of drugs.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
A. V. Vutolkina, G. O. Zasypalov, Ya. Aljajan, V. A. Klimovsky, V. A. Vinokurov, M. I. Rubtsova, Al. A. Pimerzin, A. P. Glotov
Summary: Gram-scale Ru-containing catalysts templated on structured mesoporous silica were synthesized using wetness impregnation under microwave irradiation. The catalytic properties for the hydrogenation of aromatic-rich feed were studied, and it was found that each material had its own advantage under specific operating conditions. The Ru/HNT and Ru/MCM-41/HNT catalysts showed the best performance for the removal of aromatics at temperatures of 60-100 degrees C and 60-80 degrees C, respectively, while maintaining the octane numbers.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Zahra Asadi, Samahe Sadjadi, Mehdi Nekoomanesh-Haghighi, Naeimeh Bahri-Laleh
Summary: In this study, we investigated the effect of acid-treatment of halloysite on its performance as a support for immobilizing Pd nanoparticles. We found that long-time acid-treatment significantly increased the specific surface area and induced formation of fine particles within the lumen of halloysite, while short-time acid-treatment slightly increased the specific surface area and remarkably decreased Pd loading. The activity of the synthesized catalysts followed the order of Pd/Hal > Pd/Hal-A72 > Pd/Hal-A9, demonstrating the importance of Pd loading and accessibility of Pd nanoparticles in the catalysis of PAO hydrogenation containing structurally big molecules.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Polymer Science
Zahra Izadi, Mehdi Nekoomanesh-Haghighi, Samahe Sadjadi, Mostafa Ahmadi, Naeimeh Bahri-Laleh
Summary: This study assessed the replacement of AlCl3 with other Al-based compounds or an environmentally friendly deep eutectic solvent (DES) in alpha-olefin oligomerization. The results showed that using DES as the main component of the initiating system not only reduces the need for hazardous and corrosive Al compounds, but also favors the production of low viscosity PAO oils, which have a significant share in the PAO market.
Article
Chemistry, Inorganic & Nuclear
Samahe Sadjadi, Sara Tarighi, Ali Afshar Ebrahimi
Summary: Two novel composites, composed of MIL-101 and ZSM-5 zeolites with different SiO2/Al2O3 ratios, were synthesized via surface functionalization of ZSM-5 zeolites and subsequent hydrothermal treatment with MIL-101 precursors. These composites demonstrated higher catalytic activity than their individual components in Knoevenagel condensation reaction, indicating the synergism between ZSM-5 and MIL-101. Additionally, the composites showed broad substrate scope, facile catalyst recovery, and high recyclability.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Samahe Sadjadi, Neda Abedian-Dehaghani, Xuemin Zhong, Majid M. Heravi, Peng Yuan
Summary: Three different acidic ionic liquids were grafted onto halloysite to form heterogeneous catalysts. The catalysts exhibited higher acidity than halloysite, which varied depending on the type of ionic liquid. Among them, imidazolium-based ionic liquid showed the highest catalytic activity.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Physical
Mahtab Shokri, Sara Tarighi, Mohammad Ali Faramarzi, Samahe Sadjadi, Soamyeh Mojtabavi
Summary: In this study, two ZSM-5 zeolites with different SiO2/Al2O3 ratios of 200 and 80 were synthesized and functionalized to prepare four biocatalysts for acid orange-7 dye degradation. The results showed that functionalization improved the performance and stability of the catalysts, and the SiO2/Al2O3 ratio had little effect on the stability of the catalysts.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Multidisciplinary Sciences
Samahe Sadjadi, Soheila Yaghoubi, Xuemin Zhong, Peng Yuan, Majid M. Heravi
Summary: In an attempt to prepare a low-cost and efficient acidic heterogeneous catalyst, the acidity of halloysite was improved by covalent grafting of an acidic polyionic liquid. The catalyst showed high efficiency in the conversion of fructose to 5-hydroxymethylfurfural, yielding a high percentage under optimal conditions. Additionally, the catalyst was highly reusable and capable of promoting the conversion of sucrose and maltose as well.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Xuemin Zhong, Peng Yuan, Samahe Sadjadi, Dong Liu, Yanfu Wei
Summary: Palygorskite-supported ruthenium catalysts were developed for the efficient and selective oxidation of HMF to DFF. The catalyst exhibited excellent performance with 100% HMF conversion, 98% DFF yield, and 98% DFF selectivity under optimal reaction conditions. The synergistic effect of Ru nanoparticles and palygorskite enhanced the catalytic activity.
APPLIED CLAY SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Abolfazl Heydari, Milad KhajeHassani, Haniyeh Daneshafruz, Sepideh Hamedi, Faeze Dorchei, Mario Kotlar, Fahimeh Kazeminava, Samahe Sadjadi, Farideh Doostan, Ivan Chodak, Hassan Sheibani
Summary: This study developed a nanocomposite material consisting of thermoplastic starch (TPS) reinforced with bentonite clay (BC) and encapsulated with vitamin B2 (VB). The study investigated the effects of VB on the physicochemical properties of TPS/BC films, including mechanical and thermal properties, water uptake, and weight loss in water. The addition of VB significantly increased the tensile strength and Young's modulus of TPS/BC films, with the highest values observed for nanocomposites containing 5 php of VB and 3 php of BC. The release of VB was controlled by the BC content, with higher BC content leading to lower VB release. These findings demonstrate the potential of TPS/BC/VB nanocomposites as environmentally friendly materials with improved mechanical properties and controlled release of VB, which can have significant applications in the biopolymer industry.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Samahe Sadjadi, Neda Abedian-Dehaghani, Majid M. Heravi, Xuemin Zhong, Peng Yuan, Josep Duran, Albert Poater, Naeimeh Bahri-Laleh
Summary: Halloysite nanoclay was used as a natural support for an acidic ionic liquid immobilization. The resulting catalyst exhibited improved Bronsted acidity and high recyclability. It effectively promoted the conversion of various carbohydrates to a valuable product under mild reaction conditions.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Polymer Science
Samahe Sadjadi, Abolfazl Heydari
Summary: In this study, a novel composite material was developed by combining β-cyclodextrin nanosponge and sodium alginate to immobilize palladium nanoparticles. The composite beads demonstrated excellent encapsulation capabilities and stability, making them suitable for hydrophobic substrates. The incorporation of cyclodextrin nanosponge within alginate beads improved the performance of the catalyst, allowing selective reduction of the nitro group in substrates with competing functionalities.
Article
Chemistry, Physical
Zahra Izadi Kahkeshi, Naeimeh Bahri-Laleh, Samahe Sadjadi, Mehdi Nekoomanesh Haghighi
Summary: Four novel ionic liquid compounds supported on boehmite were synthesized and used with AlCl3 to polymerize Raffinate 1 to polybutene for viscosity improver applications. The supported ionic liquids were characterized using various analytical techniques. The introduction of the supported ionic liquids resulted in polybutenes with comparable Mn and D values to the blank AlCl3 system but with lower exo-olefins content, making the copolymer more suitable for the target application. The suggested AlCl3/ionic liquid initiating system enables greener polymerization by reducing the dosage of hazardous AlCl3 compared to the blank system.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Physical
Miad Mashayekhi, Leila Moballegh, Naeimeh Bahri-Laleh, Samahe Sadjadi, Albert Poater
Summary: This study proposes the reevaluation of a trident cationic initiator system with ionic liquid (IL)/AlCl3/H2O in the cationic polymerization of 1-decene. Different ILs with different cationic moieties were synthesized and evaluated. The IL/AlCl3 system exhibited better performance than the AlCl3/H2O system, improving the molecular weight and viscosity index of the resulting polymer.
MOLECULAR CATALYSIS
(2023)
Article
Biochemistry & Molecular Biology
Alireza Mohammadi, Mohammad Kazemeini, Samahe Sadjadi
Summary: A triple photocatalytic composite was prepared and utilized for the photodegradation of Rhodamine-B (RhB) dye. The highest yield of 96.2% was achieved under specific conditions, and Methyl Orange (MO) dye was also successfully degraded. The kinetic and thermodynamic parameters were determined, and a chemical mechanism was proposed. The catalyst showed significant adsorption capacity and could be reused for multiple cycles with minimal activity loss.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2023)
Article
Chemistry, Inorganic & Nuclear
Alireza Bayat, Zohreh Mehri Lighvan, Samahe Sadjadi, Naeimeh Bahri-Laleh, Ali Ghadimi
Summary: A star-like hybrid composite of metal-organic framework with amino-functionalized Fe-based MOF and ZIF components was embedded in chitosan beads and cross-linked with glutaraldehyde to stabilize Pd nanoparticles. The catalytic composite displayed excellent performance in hydrogenation reaction, yielding the product with high conversion and low bromine index under mild reaction conditions. Moreover, the catalyst showed recyclability and little Pd leaching, making it promising for large-scale applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Fardin Saghandali, Mohammad Kazemeini, Samahe Sadjadi
Summary: In this study, three Keggin-type heteropolyacids were impregnated on halloysite to produce heterogeneous acidic catalysts for synthesizing 5-HMF. The role of halloysite in the catalyst's acidic properties and performance was found to be important. The reaction parameters for the optimal catalyst were adjusted using Response Surface Methodology, resulting in a 99.5% yield of the target compound after 43 minutes at 125 degrees C in DMSO solvent. Immobilization of silicotungstic acid on halloysite significantly reduced leaching-out, with only a 12.5% loss of activity in five consecutive reaction cycles. The catalyst's activity was also tested on converting different carbohydrates to 5-HMF, with glucose showing the highest product yield of 64.24%. Furthermore, the kinetic and thermodynamic parameters of the conversion of fructose to 5-HMF were determined.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2024)
Article
Multidisciplinary Sciences
Samahe Sadjadi, Sara Tarighi, Motahareh Delangiz, Majid Heravi
Summary: Through a novel hierarchical zeolite catalyst, efficient conversion of glycerol to solketal with a yield of 98% was achieved. The experimental results indicate that the mesoporosity of zeolite and the functionality of ionic liquid play important roles in catalytic performance.
SCIENTIFIC REPORTS
(2023)