1
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Zhao Q, Cheng X, Hu S, Zhao M, Chen J, Mu M, Yang Y, Liu H, Hu L, Zhao B, Song W. Bilateral efforts to improve SERS detection efficiency of exosomes by Au/Na 7PMo 11O 39 Combined with Phospholipid Epitope Imprinting. Biosens Bioelectron 2024; 258:116349. [PMID: 38705072 DOI: 10.1016/j.bios.2024.116349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 03/02/2024] [Accepted: 04/27/2024] [Indexed: 05/07/2024]
Abstract
Detection of cancer-related exosomes in body fluids has become a revolutionary strategy for early cancer diagnosis and prognosis prediction. We have developed a two-step targeting detection method, termed PS-MIPs-NELISA SERS, for rapid and highly sensitive exosomes detection. In the first step, a phospholipid polar site imprinting strategy was employed using magnetic PS-MIPs (phospholipids-molecularly imprinted polymers) to selectively isolate and enrich all exosomes from urine samples. In the second step, a nanozyme-linked immunosorbent assay (NELISA) technique was utilized. We constructed Au/Na7PMo11O39 nanoparticles (NPs) with both surface-enhanced Raman scattering (SERS) property and peroxidase catalytic activity, followed by the immobilization of CD9 antibodies on the surface of Au/Na7PMo11O39 NPs. The Au/Na7PMo11O39-CD9 antibody complexes were then used to recognize CD9 proteins on the surface of exosomes enriched by magnetic PS-MIPs. Lastly, the high sensitivity detection of exosomes was achieved indirectly via the SERS activity and peroxidase-like activity of Au/Na7PMo11O39 NPs. The quantity of exosomes in urine samples from pancreatic cancer patients obtained by the PS-MIPs-NELISA SERS technique showed a linear relationship with the SERS intensity in the range of 6.21 × 107-2.81 × 108 particles/mL, with a limit of detection (LOD) of 5.82 × 107 particles/mL. The SERS signal intensity of exosomes in urine samples from pancreatic cancer patients was higher than that of healthy volunteers. This bidirectional MIPs-NELISA-SERS approach enables noninvasive, highly sensitive, and rapid detection of cancer, facilitating the monitoring of disease progression during treatment and opening up a new avenue for rapid early cancer screening.
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Affiliation(s)
- Qingnan Zhao
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China; Harbin Medical University, Department Organic Chemistry, College of Pharmacy, Baojian Rd 157, Harbin, 150081, Heilongjiang, PR China
| | - Xianhui Cheng
- Center for Supramolecular Chemical Biology, State Key Laboratory of Supramolecular Structure and Materials, School of Life Sciences, Jilin University, Changchun, 130012, PR China
| | - Saizhen Hu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Menghan Zhao
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Junjie Chen
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Ming Mu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Yumei Yang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Hao Liu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Lianghai Hu
- Center for Supramolecular Chemical Biology, State Key Laboratory of Supramolecular Structure and Materials, School of Life Sciences, Jilin University, Changchun, 130012, PR China.
| | - Bing Zhao
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Wei Song
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China.
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Rezvani MA, Ardeshiri HH, Gholami A, Aghmasheh M, Doustgani A. Design of a new nanocomposite based on Keggin-type [ZnW 12O 40] 6- anionic cluster anchored on NiZn 2O 4 ceramics as a promising material towards the electrocatalytic hydrogen storage. Sci Rep 2024; 14:11038. [PMID: 38744995 PMCID: PMC11094074 DOI: 10.1038/s41598-024-61871-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2024] [Accepted: 05/10/2024] [Indexed: 05/16/2024] Open
Abstract
Extensive research efforts have been dedicated to developing electrode materials with high capacity to address the increasing complexities arising from the energy crisis. Herein, a new nanocomposite was synthesized via the sol-gel method by immobilizing K6ZnW12O40 within the surface of NiZn2O4. ZnW12O40@NiZn2O4 was characterized by FT-IR, UV-Vis, XRD, SEM, EDX, BET, and TGA-DTG methods. The electrochemical characteristics of the materials were examined using cyclic voltammogram (CV) and charge-discharge chronopotentiometry (CHP) techniques. Multiple factors affecting the hydrogen storage capacity, including current density (j), surface area of the copper foam, and the consequences of repeated cycles of hydrogen adsorption-desorption were evaluated. The initial cycle led to an impressive hydrogen discharge capability of 340 mAh/g, which subsequently increased to 900 mAh/g after 20 cycles with a current density of 2 mA in 6.0 M KOH medium. The surface area and the electrocatalytic characteristics of the nanoparticles contribute to facilitate the formation of electrons and provide good diffusion channels for the movement of electrolyte ions throughout the charge-discharge procedure.
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Affiliation(s)
- Mohammad Ali Rezvani
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 451561319, Iran.
| | - Hadi Hassani Ardeshiri
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 451561319, Iran
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
| | - Alireza Gholami
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
| | - Masomeh Aghmasheh
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 451561319, Iran
| | - Amir Doustgani
- Department of Chemical Engineering, Faculty of Engineering, University of Zanjan, Zanjan, Iran
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Chen Z, Fan Q, Huang M, Cölfen H. The Structure, Preparation, Characterization, and Intercalation Mechanism of Layered Hydroxides Intercalated with Guest Anions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2300509. [PMID: 37271930 DOI: 10.1002/smll.202300509] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 05/06/2023] [Indexed: 06/06/2023]
Abstract
Since the intercalation of anions into layered hydroxides (LHs) has a great impact not only on their nucleation and growth but also on their structure, composition, and size, the intercalation chemistry of LHs has aroused the strong interest of researchers. However, the progress in the fundamental understanding of LHs intercalated with guest anions have not been paralleled by a concomitant development of the preparation and performance improvement of such materials. Considering the guidance of a timely in-depth review for scientists in this area, a systematic introduction about the development that is made on the above-mentioned issues is highly needed but yet missing so far. Herein, recent advances in understanding the chemical composition and structure of LHs intercalated with guest anions are systematically summarized. Meanwhile, typical and emerging bottom-up synthesis methods of LHs intercalated with anions are reviewed, and the potential impact of external reaction parameters on the intercalation of anions into LHs are discussed . Besides, different analytical characterization techniques employed in the examination of guest anion-intercalated LHs are deliberated upon. Finally, although progress is slow in exploring the intercalation mechanism, as many examples as possible are included in this review and inferred the possible intercalation mechanism.
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Affiliation(s)
- Zongkun Chen
- Physical Chemistry, University of Konstanz, Universitätsstraße 10, D-78457, Konstanz, Germany
| | - Qiqi Fan
- Physical Chemistry, University of Konstanz, Universitätsstraße 10, D-78457, Konstanz, Germany
| | - Minghua Huang
- School of Materials Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Helmut Cölfen
- Physical Chemistry, University of Konstanz, Universitätsstraße 10, D-78457, Konstanz, Germany
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Darwish AS, Mahmoud SS, Bayaumy FE. Microwave-assisted hydrothermal fabrication of hierarchical-stacked mesoporous decavanadate-intercalated ZnAl nanolayered double hydroxide to exterminate different developmental stages of Trichinella spiralis and Schistosoma mansoniin-vitro. Heliyon 2023; 9:e18110. [PMID: 37483817 PMCID: PMC10362335 DOI: 10.1016/j.heliyon.2023.e18110] [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: 04/19/2023] [Revised: 07/06/2023] [Accepted: 07/07/2023] [Indexed: 07/25/2023] Open
Abstract
Hierarchically stacked mesoporous zinc-aluminium nanolayered-double-hydroxide intercalated with decavanadate (ZnAl-LDH-V10O28) is constructed using anion-exchange process via microwave-hydrothermal treatment. Physicochemical properties of ZnAl-LDH-V10O28 are characterized in detail. Decavanadate anions are intimately interacted with ZnAl-LDH nanosheets, generating highly ordered architecture of well-dimensioned stacking blocks of brucite-like nanolayers (∼8 nm). Such hierarchy improves surface-porosity and electrical-impedivity of ZnAl-LDH-V10O28 with declining its zeta-potential (ζav = 8.8 mV). In-vitro treatment of various developmental-stages of Trichinella spiralis and Schistosoma mansoni by ZnAl-LDH-V10O28 is recognized using parasitological and morphological (SEM/TEM) analyses. ZnAl-LDH-V10O28 exterminates muscle-larvae and adult-worms of Trichinella spiralis, and juvenile and adult Schistosoma mansoni, yielding near 100% mortality with rates achieving 5%/h within about 17 h of incubation. This parasiticidal behavior results from the symphony of biological activity gathering decavanadate and LDH-nanosheets. Indeed, ZnAl-LDH-V10O28 nanohybrid sample, as a promissory biocide for killing food-borne/waterborne parasites, becomes a futuristic research hotspot for studying its in-vivo bioactivity and impact-effectiveness on parasite molecular biology.
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Affiliation(s)
- Atef S. Darwish
- Department of Chemistry, Faculty of Science, Ain Shams University, 11566, Cairo, Egypt
| | - Soheir S. Mahmoud
- Schistosome Biological Materials Supply Program, Theodor Bilharz Research Institute, Giza, Egypt
| | - Fatma E.A. Bayaumy
- Zoology Department, Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo, Egypt
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5
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Kazemi F, Zamani HA, Abedi MR, Ebrahimi M. Synthesis and comparison of three photocatalysts for degrading tramadol as an analgesic and widely used drug in water samples. ENVIRONMENTAL RESEARCH 2023; 225:114821. [PMID: 36427639 DOI: 10.1016/j.envres.2022.114821] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/01/2022] [Accepted: 11/13/2022] [Indexed: 06/16/2023]
Abstract
Tramadol is an analgesic drug that is mainly excreted in the urine. The entry of Tramadol into water samples causes their biological contamination. Therefore, three catalysts such as bismuth ferrite, cobalt-doped bismuth ferrite, and a magnetized Keggin type of polyoxometalate (α-Fe2O3@phosphotungstic acid), were synthesized as photocatalysts to degrade Tramadol in water samples. The morphology and properties of the prepared photocatalysts were evaluated using several techniques. Effects of several factors, including tramadol concentration, pH, hydrogen peroxide concentration, and photocatalyst amount, were studied and optimized by a design experiment procedure based on Box-Behnken design for reducing the number of experiments and cost and investigating the interactions between factors in the photocatalytic degradation process of Tramadol. These factors were optimized for each prepared photocatalyst individually. Under the optimum conditions, the percentages of tramadol degradation and kinetics of the degradation process were evaluated in the presence of each photocatalyst. The tramadol degradation percentages using bismuth ferrite, cobalt-doped bismuth ferrite, and α-Fe2O3 @phosphotungstic acid were 81.10% for 120 min, 90.63% for 80 min, and 91.32% for 80 min, respectively. The rate constants of tramadol degradation were 0.0145, 0.0329, and 0.0312 min-1 for bismuth ferrite, cobalt-doped bismuth ferrite, and α-Fe2O3 @phosphotungstic acid, respectively. The results indicated the highest percentage of tramadol degradation and rate of the degradation process were obtained using α-Fe2O3 @phosphotungstic acid and cobalt-doped bismuth ferrite, respectively.
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Affiliation(s)
- Farshid Kazemi
- Department of Applied Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Hassan Ali Zamani
- Department of Applied Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
| | - Mohammad Reza Abedi
- Department of Applied Chemistry, Quchan Branch, Islamic Azad University, Quchan, Iran
| | - Mahmoud Ebrahimi
- Department of Applied Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
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Neethu PP, Venkatachalam G, Venkatesha NJ, Joseph D, Sakthivel A. Cobalt-Based Hydrotalcite: A Potential Non-Noble Metal-Based Heterogeneous Catalyst for Selective Hydrogenation of Aromatic Aldehydes. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.3c00135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Affiliation(s)
- Padinjare Purayil Neethu
- Inorganic Materials & Heterogeneous Catalysis Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Sabarmati Building, Tejaswini Hills, Periya P.O., Kasaragod 671320, Kerala, India
| | - Ganesh Venkatachalam
- Electrodics and Electrocatalysis (EEC) Division, CSIR - Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi 630003, Tamil Nadu, India
| | | | - Daisy Joseph
- Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Ayyamperumal Sakthivel
- Inorganic Materials & Heterogeneous Catalysis Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Sabarmati Building, Tejaswini Hills, Periya P.O., Kasaragod 671320, Kerala, India
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7
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Layered Double Hydroxide-Based Catalytic Materials for Sustainable Processes. Catalysts 2022. [DOI: 10.3390/catal12080816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Layered double hydroxides (LDH) or hydrotalcites (HT), together with their corresponding mixed oxides, continue to arouse a great deal of research interest [...]
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Immobilization of Polyoxometalates on Carbon Nanotubes: Tuning Catalyst Activity, Selectivity and Stability in H2O2-Based Oxidations. Catalysts 2022. [DOI: 10.3390/catal12050472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
In recent years, carbon nanotubes (CNTs), including N-doped ones (N-CNTs), have received significant attention as supports for the construction of heterogeneous catalysts. In this work, we summarize our progress in the application of (N)-CNTs for immobilization of anionic metal-oxygen clusters or polyoxometalates (POMs) and use of (N)-CNTs-supported POM as catalysts for liquid-phase selective oxidation of organic compounds with the green oxidant–aqueous hydrogen peroxide. We discuss here the main factors, which favor adsorption of POMs on (N)-CNTs and ensure a quasi-molecular dispersion of POM on the surface and their strong attachment to the support. The effects of the POM nature, N-doping of CNTs, acid additives, and other factors on the POM immobilization process and catalytic activity/selectivity of the (N)-CNTs-immobilized POMs are analyzed. Particular attention is drawn to the critical issue of the catalyst stability and reusability. The scope and limitations of the POM/(N)-CNTs catalysts in H2O2-based selective oxidations are discussed.
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Neethu PP, Sakthivel A. Esterification of biomass-derived levulinic acid using molybdate-intercalated hydrotalcite materials. NEW J CHEM 2022. [DOI: 10.1039/d2nj03625h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The molybdate-stabilized MgFe-HT is demonstrated as a potential catalyst for levulinic acid esterification with 93% conversion and 95% butyl-levulinate selectivity.
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Affiliation(s)
- P. P. Neethu
- Inorganic Materials & Heterogeneous Catalysis Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Sabarmati Building, Tejaswini Hills, Periya P.O. Kasaragod 671320, Kerala, India
| | - A. Sakthivel
- Inorganic Materials & Heterogeneous Catalysis Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Sabarmati Building, Tejaswini Hills, Periya P.O. Kasaragod 671320, Kerala, India
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Catalytic Synthesis of Methacrolein via the Condensation of Formaldehyde and Propionaldehyde with L-Proline Intercalated Layered Double Hydroxides. Catalysts 2021. [DOI: 10.3390/catal12010042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Aldol condensation reactions are very important C–C coupling reactions in organic chemistry. In this study, the catalytic performance of layered double hydroxides (LDHs) in the aldol condensation reaction of formaldehyde (FA) and propionaldehyde (PA) was investigated. The MxAl-LDHs (denoted as re-MxAl–LDHs; M = Ca and Mg; X = 2–4), as heterogeneous basic catalysts toward the aldol condensation reaction, were prepared via a two-step procedure. The catalyst exhibited a high PA conversion (82.59%), but the methacrolein (MAL) selectivity was only 36.01% due to the limitation of the alkali-catalyzed mechanism. On this basis, the direct intercalation of L-proline into LDHs also has been investigated. The influences of several operating conditions, including the temperature, reaction time, and substrate content, on the reaction results were systematically studied, and the optimized reaction conditions were obtained. The optimized Mg3Al–Pro-LDHs catalyst exhibited a much higher MAL selectivity than those of re-MgxAl–LDHs.
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Kirar JS, Khare S, Tiwari N. Cu(II) and Co(II) Schiff‐Base Complexes Immobilized on Layered Double Hydroxide: Synthesis, Characterizations, DFT Calculations and Catalytic Activity. ChemistrySelect 2021. [DOI: 10.1002/slct.202102373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jagat Singh Kirar
- Department of Chemistry Govt. P. G. College, Guna in-front of Sanjay Stadium Guna MP 473001 India
| | - Savita Khare
- School of Chemical Sciences Devi Ahilya University Takshashila Campus Khandwa Road Indore MP 452001 India
| | - Neha Tiwari
- School of Chemical Sciences Devi Ahilya University Takshashila Campus Khandwa Road Indore MP 452001 India
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12
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Recent Advances in Layered-Double-Hydroxides Based Noble Metal Nanoparticles Efficient Electrocatalysts. NANOMATERIALS 2021; 11:nano11102644. [PMID: 34685086 PMCID: PMC8539300 DOI: 10.3390/nano11102644] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 09/30/2021] [Accepted: 10/03/2021] [Indexed: 11/16/2022]
Abstract
With the energy crisis and environmental pollution becoming more and more serious, it is urgent to develop renewable and clean energy. Hydrogen production from electrolyzed water is of great significance to solve the energy crisis and environmental problems in the future. Recently, layered double hydroxides (LDHs) materials have been widely studied in the electrocatalysis field, due to their unique layered structure, tunable metal species and highly dispersed active sites. Moreover, the LDHs supporting noble metal catalysts obtained through the topotactic transformation of LDHs precursors significantly reduce the energy barrier of electrolyzing water, showing remarkable catalytic activity, good conductivity and excellent durability. In this review, we give an overview of recent advances on LDHs supporting noble metal catalysts, from a brief introduction, to their preparation and modification methods, to an overview of their application in the electrocatalysis field, as well as the challenges and outlooks in this promising field on the basis of current development.
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Effective Epoxidation of Fatty Acid Methyl Esters with Hydrogen Peroxide by the Catalytic System H3PW12O40/Quaternary Phosphonium Salts. Catalysts 2021. [DOI: 10.3390/catal11091058] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Six quaternary phosphonium salts (QPSs) in combination with phosphotungstic heteropolyacid, H3PW12O40, were tested in the epoxidation of rapeseed oil fatty acid methyl esters with a hydrogen peroxide aqueous solution. The QPSs consisted of trihexyl(tetradecyl)phosphonium [P6], tributyl-tetradecylphosphonium [P4] or tetraoctylphosphonium [P8] cation and different anions—chloride (Cl−), bromide (Br−), tetrafluoroborate (BF4−), bis(trifluoromethylsulfonyl)amide (NTf2−), bis(2,4,4-trimethyl-pentyl)phosphinate (Phosf−). The influence of the kind of QPS and temperature on the epoxy number, iodine number, glycol content has been determined. The epoxidation was confirmed using Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR) and elemental analysis CHO. Two QPSs with a trihexyltetradecyphosphonium cation—[P6][Fosf] and [P6][Cl]—were selected as the most effective in the studied epoxidation process. The proposed kinetic model takes into consideration the two reactions, namely, epoxidation and epoxy ring opening involving the formation of hydroxyl groups. The rate constants and activation energies for epoxidation fatty acid methyl esters were determined.
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Abstract
Methane, discovered in 1766 by Alessandro Volta, is an attractive energy source because of its high heat of combustion per mole of carbon dioxide. However, methane is the most abundant hydrocarbon in the atmosphere and is an important greenhouse gas, with a 21-fold greater relative radiative effectiveness than CO2 on a per-molecule basis. To avoid or limit the formation of pollutants that are dangerous for both human health and the atmospheric environment, the catalytic combustion of methane appears to be one of the most promising alternatives to thermal combustion. Total oxidation of methane, which is environmentally friendly at much lower temperatures, is believed to be an efficient and economically feasible way to eliminate pollutants. This work presents a literature review, a statu quo, on catalytic methane oxidation on transition metal oxide-modified ceria catalysts (MOx/CeO2). Methane was used for this study since it is of great interest as a model compound for understanding the mechanisms of oxidation and catalytic combustion on metal oxides. The objective was to evaluate the conceptual ideas of oxygen vacancy formation through doping to increase the catalytic activity for methane oxidation over CeO2. Oxygen vacancies were created through the formation of solid solutions, and their catalytic activities were compared to the catalytic activity of an undoped CeO2 sample. The reaction conditions, the type of catalysts, the morphology and crystallographic facets exposing the role of oxygen vacancies, the deactivation mechanism, the stability of the catalysts, the reaction mechanism and kinetic characteristics are summarized.
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Thomou E, Sakavitsi V, Angeli GK, Spyrou K, Froudas KG, Diamanti EK, Romanos GE, Karanikolos GN, Trikalitis PN, Gournis D, Rudolf P. A diamino-functionalized silsesquioxane pillared graphene oxide for CO 2 capture. RSC Adv 2021; 11:13743-13750. [PMID: 35423909 PMCID: PMC8697626 DOI: 10.1039/d1ra00777g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 03/31/2021] [Indexed: 01/11/2023] Open
Abstract
In the race for viable solutions that could slow down carbon emissions and help in meeting the climate change targets a lot of effort is being made towards the development of suitable CO2 adsorbents with high surface area, tunable pore size and surface functionalities that could enhance selective adsorption. Here, we explored the use of silsesquioxane pillared graphene oxide for CO2 capture; we modified silsesquioxane loading and processing parameters in order to obtain pillared structures with nanopores of the tailored size and surface properties to maximize the CO2 sorption capacity. Powder X-ray diffraction, XPS and FTIR spectroscopies, thermal analysis (DTA/TGA), surface area measurements and CO2 adsorption measurements were employed to characterize the materials and evaluate their performance. Through this optimisation process, materials with good CO2 storage capacities of up to 1.7/1.5 mmol g−1 at 273 K/298 K in atmospheric pressure, were achieved. Study of the CO2 uptake performance of silsesquioxane pillared graphene oxide prepared with different pillar loading and way of drying.![]()
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Affiliation(s)
- Eleni Thomou
- Department of Materials Science and Engineering
- University of Ioannina
- Ioannina 45110
- Greece
- Zernike Institute for Advanced Materials
| | - Viktoria Sakavitsi
- Department of Materials Science and Engineering
- University of Ioannina
- Ioannina 45110
- Greece
| | | | - Konstantinos Spyrou
- Department of Materials Science and Engineering
- University of Ioannina
- Ioannina 45110
- Greece
| | | | - Evmorfia K. Diamanti
- Department of Materials Science and Engineering
- University of Ioannina
- Ioannina 45110
- Greece
| | - George E. Romanos
- Institute of Nanoscience and Nanotechnology
- N.C.S.R. Demokritos
- Ag. Paraskevi Attikis
- Greece
| | - Georgios N. Karanikolos
- Department of Chemical Engineering
- Khalifa University
- Abu Dhabi
- United Arab Emirates
- Research and Innovation Center on CO2 and H2 (RICH)
| | | | - Dimitrios Gournis
- Department of Materials Science and Engineering
- University of Ioannina
- Ioannina 45110
- Greece
| | - Petra Rudolf
- Zernike Institute for Advanced Materials
- University of Groningen
- Groningen
- The Netherlands
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16
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Shul'pina LS, Vinogradov MM, Kozlov YN, Nelyubina YV, Ikonnikov NS, Shul'pin GB. Copper complexes with 1,10-phenanthrolines as efficient catalysts for oxidation of alkanes by hydrogen peroxide. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119889] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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