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Khdary NH, Almuarqab BT, El Enany G. Nanoparticle-Embedded Polymers and Their Applications: A Review. Membranes (Basel) 2023; 13:membranes13050537. [PMID: 37233597 DOI: 10.3390/membranes13050537] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/22/2023] [Accepted: 04/23/2023] [Indexed: 05/27/2023]
Abstract
There has been increasing interest in the study and development of nanoparticle-embedded polymeric materials and their applications to special membranes. Nanoparticle-embedded polymeric materials have been observed to have a desirable compatibility with commonly used membrane matrices, a wide range of functionalities, and tunable physicochemical properties. The development of nanoparticle-embedded polymeric materials has shown great potential to overcome the longstanding challenges faced by the membrane separation industry. One major challenge that has been a bottleneck to the progress and use of membranes is the balance between the selectivity and the permeability of the membranes. Recent developments in the fabrication of nanoparticle-embedded polymeric materials have focused on how to further tune the properties of the nanoparticles and membranes to improve the performance of the membranes even further. Techniques for improving the performance of nanoparticle-embedded membranes by exploiting their surface characteristics and internal pore and channel structures to a significant degree have been incorporated into the fabrication processes. Several fabrication techniques are discussed in this paper and used to produce both mixed-matrix membranes and homogenous nanoparticle-embedded polymeric materials. The discussed fabrication techniques include interfacial polymerization, self-assembly, surface coating, and phase inversion. With the current interest shown in the field of nanoparticle-embedded polymeric materials, it is expected that better-performing membranes will be developed soon.
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Affiliation(s)
- Nezar H Khdary
- King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
| | - Basha T Almuarqab
- King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
| | - Gaber El Enany
- Department of Physics, College of Science and Arts in Uglat Asugour, Qassim University, Buraydah 52571, Saudi Arabia
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Mostafa MMM, Li Y, Halawani W, Narasimharao K, Abdel Salam M, Alshehri AA, Khdary NH, Al-Faifi S, Gu L, Dutta Chowdhury A. Evaluating the efficacy of nanosized CuZnAl and CuZnZr mixed oxides for electrocatalytic CO 2 reduction. Dalton Trans 2023; 52:5155-5168. [PMID: 36961280 DOI: 10.1039/d2dt04111a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
The increased awareness of carbon management has prompted the scientific community towards delivering sustainable catalytic technologies, preferably from CO2. Copper-based multifunctional catalysts are the most frequently used for thermal hydrogenation and electrocatalytic reduction of CO2 (CO2R) processes. To improve the understanding and efficacy of these materials for the CO2R reaction, Cu-Zn oxides combined with Al2O3 and ZrO2 were synthesized by the coprecipitation method and annealed at 500 °C, 600 °C, and 700 °C (i.e., Cu/ZnO/Al2O3-x and Cu/ZnO/ZrO2 systems-x, where x is the annealing temperature) to tune their multi-functionality. We demonstrate that the composition of Cu-Zn oxides and pretreatment temperature impact the electrocatalytic CO2R performance, where CuZnZr-600 and CuZnAl-700 materials are superior. Different characterization tools were employed to rationalize the results described in this work, which could provide a way to design an efficient catalytic system for the CO2R process.
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Affiliation(s)
- Mohamed Mokhtar M Mostafa
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
| | - Yining Li
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, 430072, China.
| | - Wael Halawani
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
| | - Katabathini Narasimharao
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
| | - Mohamed Abdel Salam
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
| | - Abdulmohsen A Alshehri
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
| | - Nezar H Khdary
- King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
| | - Sulaiman Al-Faifi
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
| | - Lin Gu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, 430072, China.
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Khdary NH, El Enany G, Almalki AS, Alhassan AM, Altamimi A, Alshihri S. Preparation of Cu/Sn-Organic Nano-Composite Catalysts for Potential Use in Hydrogen Evolution Reaction and Electrochemical Characterization. Nanomaterials (Basel) 2023; 13:911. [PMID: 36903789 PMCID: PMC10005550 DOI: 10.3390/nano13050911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/14/2023] [Accepted: 02/18/2023] [Indexed: 06/18/2023]
Abstract
In this work, the solvothermal solidification method has been used to be prepared as a homogenous CuSn-organic nano-composite (CuSn-OC) to use as a catalyst for alkaline water electrolysis for cost-effective H2 generation. FT-IR, XRD, and SEM techniques were used to characterize the CuSn-OC which confirmed the formation of CuSn-OC with a terephthalic acid linker as well as Cu-OC and Sn-OC. The electrochemical investigation of CuSn-OC onto a glassy carbon electrode (GCE) was evaluated using the cyclic voltammetry (CV) method in 0.1 M KOH at room temperature. The thermal stability was examined using TGA methods, and the Cu-OC recorded a 91.4% weight loss after 800 °C whereas the Sn-OC and CuSn-OC recorded 16.5 and 62.4%, respectively. The results of the electroactive surface area (ECSA) were 0.5, 0.42, and 0.33 m2 g-1 for the CuSn-OC, Cu-OC, and Sn-OC, respectively, and the onset potentials for HER were -420, -900, and -430 mV vs. the RHE for the Cu-OC, Sn-OC, and CuSn-OC, respectively. LSV was used to evaluate the electrode kinetics, and the Tafel slope for the bimetallic catalyst CuSn-OC was 190 mV dec-1, which was less than for both the monometallic catalysts, Cu-OC and Sn-OC, while the overpotential was -0.7 vs. the RHE at a current density of -10 mA cm-2.
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Affiliation(s)
- Nezar H. Khdary
- Institute of Materials Science, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
| | - Gaber El Enany
- Department of Physics, College of Science and Arts in Uglat Asugour, Qassim University, Buraydah 52571, Saudi Arabia
| | - Amani S. Almalki
- Institute of Materials Science, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
| | - Ahmed M. Alhassan
- Institute of Materials Science, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
| | - Abdullah Altamimi
- Institute of Materials Science, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
| | - Saeed Alshihri
- Institute of Materials Science, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
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Khdary NH, Alangari AA, Katubi KM, Alanazi M, Alhassan A, Alzahrani SD, Khan Z, Alanazi IO. Synthesis of Gingerol-Metals Complex and in-vitro Cytotoxic Activity on Human Colon Cancer Cell Line. Cancer Manag Res 2023; 15:87-98. [PMID: 36733670 PMCID: PMC9888304 DOI: 10.2147/cmar.s391546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 01/04/2023] [Indexed: 01/28/2023] Open
Abstract
Introduction Herbs are excellent sources of medicinal substances, and their curative abilities have been recognized to treat many ailments and are used for example as antioxidants, analgesics, anti-inflammatories, antipyretics, and many other medicinal uses. The properties of natural compounds and their health effects have been studied extensively, especially those that originate from plant sources such as ginger. The ginger plant contains many chemical compounds, such as 6-gingerol, which is characterized by containing active groups such as carbonyl and hydroxide, which can be attached to metal molecules. This is what was done in this study, where the formation of complexes with a group of metals was studied and their effect on cancer cells was investigated. These complexes will open new horizons for further study of medicinal uses. Methods The synthesis of gingerol-metal complexes was carried out by conjugating gingerol molecules with Ag, Au, Cd, Co, Cu, Ni, and Zn metal ions. The extracted gingerol was transferred to culture tubes and deionized water-DMSO were added followed by sonication. The tubes were incubated at 90°C for two days as well as the control sample. The samples were then filtered and the complex solutions were transferred into new tubes for further studies. Different characterization techniques such as FT-IR, UV-vis spectroscopy, FESEM, and EDX are used to confirm the formation of the complexes. The in vitro of the complexes was tested by the 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assay against the human colorectal cancer cell lines HCT116 and HT29 which exhibited strong cytotoxicity. Results The gingerol-metal complexes showed an enhancement as an anticancer agent compared to the control. The in vitro anticancer activity showed that the Ag-gingerol complex showed the most activity among the other complexes. Discussion Gingerol-metal complexes can inhibit cancer cells, noting that the potency of the complex depends on the type of metal used.
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Affiliation(s)
- Nezar H Khdary
- Institute of Materials Science, King Abdulaziz City for Science and Technology, Riyadh, Kingdom of Saudi Arabia,Correspondence: Nezar H Khdary, Institute of Materials Science, King Abdulaziz City for Science and Technology (KACST), Riyadh, Kingdom of Saudi Arabia, Tel +966-114814236, Email
| | | | - Khadijah M Katubi
- Department of Chemistry, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Kingdom of Saudi Arabia
| | - Mohammad Alanazi
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Ahmed Alhassan
- Institute of Materials Science, King Abdulaziz City for Science and Technology, Riyadh, Kingdom of Saudi Arabia
| | - Sami D Alzahrani
- Institute of Materials Science, King Abdulaziz City for Science and Technology, Riyadh, Kingdom of Saudi Arabia
| | - Zahid Khan
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Ibrahim O Alanazi
- Institute of Materials Science, King Abdulaziz City for Science and Technology, Riyadh, Kingdom of Saudi Arabia,Ibrahim O Alanazi, Aging institute, King Abdulaziz City for Science and Technology (KACST), Riyadh, Kingdom of Saudi Arabia, Tel +966114813289, Email
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Methneni N, Ezdini K, Ben Abdeljelil N, Van Loco J, Van den Houwe K, Jabeur R, Fekih Sallem O, Jaziri A, Fernandez-Serrano M, Khdary NH, Ben Mansour H. Occurrence of Textile Dyes and Metals in Tunisian Textile Dyeing Effluent: Effects on Oxidative Stress Status and Histological Changes in Balb/c Mice. Int J Mol Sci 2021; 22:ijms222212568. [PMID: 34830450 PMCID: PMC8619562 DOI: 10.3390/ijms222212568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 11/10/2021] [Accepted: 11/11/2021] [Indexed: 11/23/2022] Open
Abstract
Although it is known that textile wastewater contains highly toxic contaminants whose effects in humans represent public health problems in several countries, studies involving mammal species are scarce. This study was aimed to evaluate the toxicity profile of 90-days oral administration of textile dyeing effluent (TDE) on oxidative stress status and histological changes of male mice. The TDE was collected from the textile plant of Monastir, Tunisia and evaluated for the metals, aromatic amines, and textile dyes using analytical approaches. Metal analysis by ICP-MS showed that the tested TDE exhibited very high levels of Cr, As, and Sr, which exceeded the wastewater emission limits prescribed by WHO and Tunisian authority. The screening of TDE through UPLC-MS/MS confirmed the presence of two textile dyes: a triphenylmethane dye (Crystal violet) and a disperse azo dye (Disperse yellow 3). Exposure to TDE significantly altered the malondialdehyde (MDA), Conjugated dienes (CDs), Sulfhydryl proteins (SHP) and catalase levels in the hepatic and renal tissues. Furthermore, histopathology observation showed that hepatocellular and renal lesions were induced by TDE exposure. The present study concluded that TDE may involve induction of oxidative stress which ensues in pathological lesions in several vital organs suggesting its high toxicity. Metals and textile dyes may be associated with the observed toxicological effects of the TDE. These pollutants, which may have seeped into surrounding rivers in Monastir city, can cause severe health malaise in wildlife and humans.
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Affiliation(s)
- Nosra Methneni
- Research Unit of Analysis, Process Applied to the Environment–APAE (UR17ES32) Higher Institute of Applied Sciences and Technology Mahdia, University of Monastir, Monastir 5000, Tunisia; (N.M.); (O.F.S.); (A.J.)
- Laboratory of Chemical Residues and Contaminants, Direction of Food Medicines and Consumer Safety, 1050 Brussels, Belgium; (J.V.L.); (K.V.d.H.)
- Department of Chemical Engineering, Faculty of Sciences, University of Granada, 18002 Granada, Spain;
| | - Khawla Ezdini
- Laboratory of Genetic, Biodiversity and Bio-Resources Valorisation, University of Monastir, Monastir 5000, Tunisia;
| | - Nouha Ben Abdeljelil
- Department of Pathology, Fattouma Bourguiba University Hospital, Monastir 5000, Tunisia;
| | - Joris Van Loco
- Laboratory of Chemical Residues and Contaminants, Direction of Food Medicines and Consumer Safety, 1050 Brussels, Belgium; (J.V.L.); (K.V.d.H.)
| | - Kathy Van den Houwe
- Laboratory of Chemical Residues and Contaminants, Direction of Food Medicines and Consumer Safety, 1050 Brussels, Belgium; (J.V.L.); (K.V.d.H.)
| | - Riheb Jabeur
- Department of Matter and Life Sciences, Bretagne Sud University, IRDL, FRE CNRS 3744, CER Yves Coppens, BP573, 56000 Vannes, France;
| | - Ons Fekih Sallem
- Research Unit of Analysis, Process Applied to the Environment–APAE (UR17ES32) Higher Institute of Applied Sciences and Technology Mahdia, University of Monastir, Monastir 5000, Tunisia; (N.M.); (O.F.S.); (A.J.)
| | - Ahlem Jaziri
- Research Unit of Analysis, Process Applied to the Environment–APAE (UR17ES32) Higher Institute of Applied Sciences and Technology Mahdia, University of Monastir, Monastir 5000, Tunisia; (N.M.); (O.F.S.); (A.J.)
| | | | - Nezar H. Khdary
- King Abdulaziz City for Science and Technology (KACST), 11442 Riyadh, Saudi Arabia
- Correspondence: (N.H.K.); (H.B.M.)
| | - Hedi Ben Mansour
- Research Unit of Analysis, Process Applied to the Environment–APAE (UR17ES32) Higher Institute of Applied Sciences and Technology Mahdia, University of Monastir, Monastir 5000, Tunisia; (N.M.); (O.F.S.); (A.J.)
- Correspondence: (N.H.K.); (H.B.M.)
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Alharthi MN, Ismail I, Bellucci S, Khdary NH, Abdel Salam M. Biosynthesis Microwave-Assisted of Zinc Oxide Nanoparticles with Ziziphus jujuba Leaves Extract: Characterization and Photocatalytic Application. Nanomaterials (Basel) 2021; 11:1682. [PMID: 34206802 PMCID: PMC8307762 DOI: 10.3390/nano11071682] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/15/2021] [Accepted: 06/24/2021] [Indexed: 12/18/2022]
Abstract
The present work is intended to biosynthesize zinc oxide nanoparticles (ZnO NPs) via facile and modern route using aqueous Ziziphus jujuba leaves extract assisted by microwave and explore their photocatalytic degradation of methyl orange anionic dye and methylene blue cationic dye under solar irradiation. The biosynthesized microwave assisted ZnO NPs were characterized and the results showed that ZnO NPs contain hexagonal wurtzite and characterized with a well-defined spherical-like shape with an outstanding band gap (2.70 eV), average particle size of 25 nm and specific surface area of 11.4 m2/g. The photocatalytic degradation of the MO and MB dyes by biosynthesized ZnO NPs under solar irradiation was studied and the results revealed the selective nature of the ZnO NPs for the adsorption and further photocatalytic degradation of the MO dye compared to the MB dye. In addition, the photocatalytic degradation of MO and MB dyes by the ZnO NPs under solar radiation was fitted by the first-order kinetics. Moreover, the photodegradation mechanism proposed that superoxide ions and hydroxyl radicals are the main reactive species.
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Affiliation(s)
- Maymounah N. Alharthi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Saudi Arabia; (M.N.A.); (I.I.)
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Iqbal Ismail
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Saudi Arabia; (M.N.A.); (I.I.)
| | - Stefano Bellucci
- National Laboratories of Frascati, National Institute of Nuclear Physics, I-00044 Frascati, Italy;
| | - Nezar H. Khdary
- King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh 11442, Saudi Arabia;
| | - Mohamed Abdel Salam
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Saudi Arabia; (M.N.A.); (I.I.)
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Amer MS, Ghanem MA, Al-Mayouf AM, Arunachalam P, Khdary NH. Low-loading of oxidized platinum nanoparticles into mesoporous titanium dioxide for effective and durable hydrogen evolution in acidic media. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.04.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Beltifa A, Machreki M, Ghorbel A, Belaid A, Smaoui E, Akrout FM, Di Bella G, Khdary NH, Reyns T, Mansour HB, Van Loco J. Human urine contamination with environmental pollutants: simultaneous determination using UPLC-MS/MS. J Water Health 2019; 17:371-379. [PMID: 31095513 DOI: 10.2166/wh.2019.264] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Paraben derivatives are widely used as an antifungal, antimicrobial preservative in cosmetic products, pharmaceuticals, and food. These molecules are called endocrine disruptors (EDCs). The exposure of the human body to paraben derivatives needs further study and for this purpose 200 urine samples were collected from Tunisian men and women aged between 5 and 90 years to determine three paraben derivatives: methylparaben (MP), ethylparaben (EP) and propylparaben (PP) using ultra performance liquid chromatography-tandem mass spectrometer (UPLC-MS/MS). The three major parabens were found in 95 urine samples. The obtained results indicate that MP, EP, and PP were detected in 57%, 46%, and 40% of all samples, respectively. Urinary concentration for the three parabens was in the range of 0.88-84.46 ng/mL, 0.52-29.2 ng/mL, and 0.51-28.17 ng/mL of PP, MP, and EP, respectively. In addition, the concentrations of the paraben derivatives in women were higher than those of men. These findings indicate that the exposure occurs from common products (foods, cosmetics, and pharmaceuticals). The Tunisian authorities should control the composition of packaging of these common products in order to protect humans against EDCs.
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Affiliation(s)
- Asma Beltifa
- Research Unit of Analysis and Process Applied to Environmental-APAE UR17ES32 Higher Institute of Applied Sciences and Technology Mahdia, University of Monastir, Monastir, Tunisia E-mail: ; Faculté des Sciences Mathématiques, Physiques et Naturelles, Université Tunis ElManar, Tunis, Tunisia
| | - Monia Machreki
- Research Unit of Analysis and Process Applied to Environmental-APAE UR17ES32 Higher Institute of Applied Sciences and Technology Mahdia, University of Monastir, Monastir, Tunisia E-mail:
| | - Asma Ghorbel
- Hygiene Laboratory/Toxicology Unit, Hedi Chaker Hospital, Sfax, Tunisia
| | - Afifa Belaid
- Research Unit of Analysis and Process Applied to Environmental-APAE UR17ES32 Higher Institute of Applied Sciences and Technology Mahdia, University of Monastir, Monastir, Tunisia E-mail:
| | - Emna Smaoui
- Hygiene Laboratory/Toxicology Unit, Hedi Chaker Hospital, Sfax, Tunisia
| | | | | | - Nezar H Khdary
- Excellence Centers, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - Tim Reyns
- Laboratory of Chemical Residues and Contaminants, Direction of Food, Medicines and Consumer Safety, Scientific Institute of Public Health, 1050 Brussels, Belgium
| | - Hedi Ben Mansour
- Research Unit of Analysis and Process Applied to Environmental-APAE UR17ES32 Higher Institute of Applied Sciences and Technology Mahdia, University of Monastir, Monastir, Tunisia E-mail:
| | - Joris Van Loco
- Laboratory of Chemical Residues and Contaminants, Direction of Food, Medicines and Consumer Safety, Scientific Institute of Public Health, 1050 Brussels, Belgium
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Khdary NH, Ghanem MA, Abdesalam ME, Al-Garadah MM. Sequestration of CO 2 using Cu nanoparticles supported on spherical and rod-shape mesoporous silica. Journal of Saudi Chemical Society 2018. [DOI: 10.1016/j.jscs.2016.05.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Khdary NH, Alkhuraiji WS, Ghanem MA, Alqureshah FA. Anchoring di and tri-metallic nanoparticles on an amorphous functionalized surface for inducing photocatalytic activity. NEW J CHEM 2017. [DOI: 10.1039/c7nj01925d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Surface functionalization chemistry was applied to immobilize di and tri metal nanoparticles on amorphous particles for an economically low-cost photocatalyst.
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Affiliation(s)
- Nezar H. Khdary
- King Abdulaziz City for Science and Technology
- Riyadh 11442
- Kingdom of Saudi Arabia
| | | | | | - Fahd A. Alqureshah
- King Abdulaziz City for Science and Technology
- Riyadh 11442
- Kingdom of Saudi Arabia
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Khdary NH, Gasim AE, Muriani ME, Alshehrie AA. Modeling Distribution of Selective Ions in Urban and Rural Areas Using Geographical Information System. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/jwarp.2015.76041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Barnes JC, Frasconi M, Young RM, Khdary NH, Liu WG, Dyar SM, McGonigal PR, Gibbs-Hall IC, Diercks CS, Sarjeant AA, Stern CL, Goddard WA, Wasielewski MR, Stoddart JF. Solid-State Characterization and Photoinduced Intramolecular Electron Transfer in a Nanoconfined Octacationic Homo[2]Catenane. J Am Chem Soc 2014; 136:10569-72. [DOI: 10.1021/ja505093d] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | | | | | - Nezar H. Khdary
- National
Center for Nano Technology Research, King Abdulaziz City for Science and Technology (KACST) P.O. Box 6086, Riyadh 11442, Kingdom of Saudi Arabia
| | - Wei-Guang Liu
- Materials
and Process Simulation Center, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, United States
| | | | | | | | | | | | | | - William A. Goddard
- Materials
and Process Simulation Center, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, United States
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Abstract
A synthetic approach is developed to produce highly disperse, low loading (3.28 wt%) Pt nanoparticles incorporated silica (Pt-NP–S) with average diameter of 3.5 nm using economical and simple surface chemical modification and reduction processes.
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Affiliation(s)
- Nezar H. Khdary
- King Abdulaziz City for Science and Technology
- , Kingdom of Saudi Arabia
| | - Mohamed A. Ghanem
- Chemistry Department
- College of Science
- King Saud University
- Kingdom of Saudi Arabia
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Fahrenbach AC, Hartlieb KJ, Sue CH, Bruns CJ, Barin G, Basu S, Olson MA, Botros YY, Bagabas A, Khdary NH, Stoddart JF. Rapid thermally assisted donor–acceptor catenation. Chem Commun (Camb) 2012; 48:9141-3. [DOI: 10.1039/c2cc34427k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
A nanoscavenger of mercaptopropyl-modified silica microparticles has been developed for the determination of trace levels of mercury(II) in water. The synthesis of silica microparticles nanoscavengers is carried out by modification of pre-formed silica particles with mercaptopropyltrimethoxysilane or by incorporating the thiol modification agent during the growth of the silica particles. The silica nanoscavengers were characterized by SEM, TGA, particle analyzer, IR and the parameters influencing the extraction and recovery phases of the preconcentration process were performed by AAS. The results show that careful choice of particle size and surface characteristics produce a new mercapto-silica-nanoscavenger that disperses in water as a quasi-stable sol. This permits the facile recovery of the mercury-loaded nanoscavenger particles. No agitation is required during the mercury extraction as the dispersion is maintained by Brownian motion and slow gravitational sedimentation. The technique overcomes a number of problems, such as cross-contamination and decreases in mercury concentration during sample transportation to the laboratory. Recovery achieved reaches >97 ± 4% over a wide range of preconcentration factors. At a preconcentration factor of 50 the limit of detection (3σ) was 0.19 ng mL(-1). The method is environmentally friendly as only 300 mg of mercapto-nanoscavenger is used, no organic solvent is required for the extraction and the experiment is performed without the need for manual or mechanical agitation.
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Affiliation(s)
- Nezar H Khdary
- King Abdulaziz City for Science and Technology (KACST), National Center for Environmental Technology, P.O. Box 6086, 11442 Riyadh, Saudi Arabia.
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Howard AG, Khdary NH. Nanoscavenger based dispersion preconcentration; sub-micron particulate extractants for analyte collection and enrichment. Analyst 2005; 130:1432-8. [PMID: 16172670 DOI: 10.1039/b506242j] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new approach has been developed for the preconcentration of analytes from solution using nanoscavengers; monodisperse functionalised particles of sub-micron dimensions, that can be suspended as a quasi-stable sol in an aqueous solution, and quantitatively recovered with the analyte by conventional filtration. No external agitation of the sample is required as the particles move naturally through the sample by Brownian motion, convection and sedimentation. By careful choice and control of their particle size and surface chemistries, nanoscavengers can be designed to suit a number of different analytical problems. Surface modification of these nanometre-sized particles, through the grafting of complexing or partitioning functional groups, can produce nanoscavengers having affinities for specific analytes and operating through a wide range of mechanisms from covalent bonding to hydrophobic interaction. The approach is illustrated by the development of an extraction-based preconcentration of metals from solution that employs sub-micron Stöber-type silica spheres, the surfaces of which have been modified using chelating diamine and dithiocarbamate groups. The concept has potentially widespread applicability as it is neither limited to metal extractions, nor to the use of silica-based nanoscavengers. Minimal involvement of organic solvents make nanoscavengers a potentially environmentally benign ("green") alternative to many conventional solvent extraction techniques.
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Affiliation(s)
- Alan G Howard
- School of Chemistry, University of Southampton, Southampton, UK SO17 1BJ.
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Howard AG, Khdary NH. Spectrofluorimetric determination of surface-bound thiol groups and its application to the analysis of thiol-modified silicas. Analyst 2004; 129:860-3. [PMID: 15343404 DOI: 10.1039/b407566h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A sensitive spectofluorimetric method has been developed for the quantitative measurement of surface-bound thiol groups. The procedure is based on the quantitative esterification of the thiol group with Rhodamine B and its subsequent release from the solid by base hydrolysis for spectrofluorimetric determination. Application of the method to the analysis of thiol-modified nanoparticulate silicas yielded results that compared favourably against alternative approaches based on measurements of mercury capacity and iodometric titration of the thiol groups. Non-specific Rhodamine uptake, assessed using unmodified silica and C18-modified silica, did not significantly influence the analytical results. When applied to a typical 50 mg sample, the detection limit of the procedure was 1 nmole SH g(-1) silica.
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Affiliation(s)
- A G Howard
- School of Chemistry, University of Southampton, Southampton, UKSO17 1BJ
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