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Alhindawy IG, Mira HI, Youssef AO, Abdelwahab SM, Zaher AA, El-Said WA, Elshehy EA, Abdelkader AM. Cobalt doped titania-carbon nanosheets with induced oxygen vacancies for photocatalytic degradation of uranium complexes in radioactive wastes. Nanoscale Adv 2022; 4:5330-5342. [PMID: 36540120 PMCID: PMC9724698 DOI: 10.1039/d2na00467d] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 10/05/2022] [Indexed: 06/03/2023]
Abstract
The photocatalytic degradation of uranium complexes is considered among the most efficient techniques for the efficient removal of uranium ions/complexes from radioactive wastewater. Described here is a nanostructured photocatalyst based on a cobalt-doped TiO2 composite with induced oxygen vacancies (Co@TiO2-C) for the photocatalytic removal of uranium complexes from contaminated water. The synergy between oxygen vacancies and Co-doping produced a material with a 1.7 eV bandgap, while the carbon network facilitates electron movement and hinders the e-h recombination. As a result, the new photocatalyst enables the decomposition of uranium-arsenazo iii complexes (U-ARZ3), followed by photocatalytic reduction of hexavalent uranium to insoluble tetravalent uranium. Combined with the nanosheet structure's high surface area, the photocatalytic decomposition, reduction efficiency, and kinetics were significantly enhanced, achieving almost complete U(vi) removal in less than 20 minutes from solution with a concentration as high as 1000 mL g-1. Moreover, the designed photocatalyst exhibits excellent stability and reusability without decreasing the photocatalytic performance after 5 cycles.
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Affiliation(s)
| | - Hamed I Mira
- Nuclear Materials Authority El Maadi Cairo Egypt
| | - Ahmed O Youssef
- Department of Chemistry, Faculty of Science, Ain Shams University Cairo Egypt
| | - Saad M Abdelwahab
- Department of Chemistry, Faculty of Science, Ain Shams University Cairo Egypt
| | - Ahmed A Zaher
- Department of Chemistry, Faculty of Science, Mansoura University Elmansoura Egypt
| | - Waleed A El-Said
- Department of Chemistry, Faculty of Science, Assiut University Assiut 71516 Egypt
- University of Jeddah, College of Science, Department of Chemistry PO Box 80327 Jeddah 21589 Saudi Arabia
| | | | - Amr M Abdelkader
- Department of Engineering, Bournemouth University Talbot Campus, Fern Barrow Poole BH12 5BB UK
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Zaki RM, Wani MY, Mohammed A, El-Said WA. Design, Synthesis and Evaluation of Novel Se-alkylated pyrazoles and Their Cyclized Analogs as Potential Anticancer Agents. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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El-Said WA, Choi JW. Corrigendum to "High selective spectroelectrochemical biosensor for HCV-RNA detection based on a specific peptide nucleic acid" [Spectrochim. Acta Part A: Mol. Biomol. Spectrosc. 217 (2019) 288-293]. Spectrochim Acta A Mol Biomol Spectrosc 2022; 279:121486. [PMID: 35691170 DOI: 10.1016/j.saa.2022.121486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- Waleed A El-Said
- Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt.
| | - Jeong-Woo Choi
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 04107, Republic of Korea
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El-Said WA, Alsulmi A, Alshitari W. Hydrothermal synthesis of Mn3O4 nanorods modified indium tin oxide electrode as an efficient nanocatalyst towards direct urea electrooxidation. PLoS One 2022; 17:e0272586. [PMID: 35925927 PMCID: PMC9352088 DOI: 10.1371/journal.pone.0272586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 07/21/2022] [Indexed: 11/18/2022] Open
Abstract
Control fabrication of metal-oxide nanocatalysts for electrochemical reactions has received considerable research attention. Here, manganese oxide (Mn3O4) nanorods modified indium tin oxide (ITO) electrodes were prepared based on the in-situ one-step hydrothermal methods. The nanorods were well characterized using field emission scanning electron microscopy, Fourier transform infrared, and X-ray diffraction spectroscopy. The results showed the formation of pure crystalline Mn3O4 nanorods with a length of approximately 1.4 μm and a thickness of approximately 100 ± 30 nm. The Mn3O4 nanorod-modified ITO electrodes were used for accelerating urea electrochemical oxidation at room temperature using cyclic and square wave voltammetry techniques. The results indicated that the modified electrode demonstrated excellent electrocatalytic performance toward urea electrooxidation in an alkaline medium over concentrations ranging from 0.2 to 4 mol/L. The modified electrode showed high durability, attaining more than 88% of its baseline performance after 150 cycles; furthermore, the chronoamperometry technique demonstrated high stability. Thus, the Mn3O4 nanorod-modified ITO electrode is a promising anode for direct urea fuel cell applications.
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Affiliation(s)
- Waleed A. El-Said
- Department of Chemistry, University of Jeddah, College of Science, Jeddah, Saudi Arabia
- Department of Chemistry, Faculty of Science, Assiut University, Assiut, Egypt
- * E-mail:
| | - Ahmad Alsulmi
- Department of Chemistry, University of Jeddah, College of Science, Jeddah, Saudi Arabia
| | - Wael Alshitari
- Department of Chemistry, University of Jeddah, College of Science, Jeddah, Saudi Arabia
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Hussein MA, Alamry KA, Alsulami QA, Elshehy EA, El-Said WA. Design and synthesis of a combined meso-adsorbent/chemo-sensor for extraction and detection of silver ions. Spectrochim Acta A Mol Biomol Spectrosc 2022; 272:120938. [PMID: 35124483 DOI: 10.1016/j.saa.2022.120938] [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] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 01/14/2022] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
We synthesized a new pH-dependent meso-captor/sensor for the visual monitoring and selective sequestering of Ag(I) ions from wastewater. The SBA-16 microspheres were successfully synthesized via a direct hydrothermal treatment through surfactant-assisted cooperative self-assembly. The meso-captor/sensor was designed via the direct immobilization of the chromogenic Acid Blue 90 (AB90) chelate into cubical large, open mesoporous SBA-16 carriers and investigate of its ability to detect and retain silver ions from aqueous solutions. Results show that the synthesized SBA-16 microspheres were retained after modification and the AB90 functional groups were immobilized hierarchically inside the mesopore channels. This was evidenced by the N2 adsorption, X-ray Photoelectron Spectroscopy (XPS), Fourier Transform Infrared (FTIR), Scanning Electron Microscope (SEM), High-Resolution Transmission Electron Microscope (HR-TEM), and elemental analyses. Batch adsorption experiments were carried out and the effects of various parameters on Ag(I) ions removal and detection were determined. The optimum adsorption/detection of Ag(I) ions were recorded at a pH of 6.2 within 30 min with color change from a brilliant blue to a pale blue-gray. The spectral response for [SBA-16@AB90 → Ag(I)] complex showed a maximum reflectance at λmax = 385 nm within 2.5 min response time (tR); the LOD was close to 3.87 µg/L while the LOQ approached 12.83 µg/L, this was attributed to the concentration range at which a linear signal has been observed against Ag(I) analyte concentration (i.e., 5 to 1000 µg/L) at pH 6.2 with standard deviation (SD) of 0.077 (RSD% = 9.5 at n = 8).
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Affiliation(s)
- Mahmoud A Hussein
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Khalid A Alamry
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Qana A Alsulami
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Emad A Elshehy
- Nuclear Materials Authority, P.O. Box 530, El Maadi, Cairo, Egypt.
| | - Waleed A El-Said
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt; College of Science, Department of Chemistry, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia
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El-Said WA, Qaisi RM, Placide V, Choi JW. A stable naked-eye colorimetric sensor for monitoring release of extracellular gamma-aminobutyric acid (GABA) neurotransmitter from SH-SY5Y cells. Spectrochim Acta A Mol Biomol Spectrosc 2022; 267:120517. [PMID: 34739892 DOI: 10.1016/j.saa.2021.120517] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 10/04/2021] [Accepted: 10/14/2021] [Indexed: 06/13/2023]
Abstract
A novel optical γ-aminobutyric acid (GABA)-based sensor was developed on interacting thiol compounds and o-phthalaldehyde (OPA) to form thiacetal compounds. Then, the thiacetal interacts with the GABA molecule to form an isoindole compound. The effects of four thiol compounds on the stability of the resulting isoindole compound were assessed. The 2-mercaptoethanol, "one of the most used derivatizing agents," is unexpectedly the least stable; while, 16-mercaptohexadecanoic acid resulted in the most durable isoindole compound. The developed sensor showed the capability for detecting GABA within a wide concentration range spanning from 500 nmol L-1 to 100 µmol L-1. The detection limit was about 330 nmol L-1, which indicated the high sensitivity of the developed sensor compared with those previously reported. The findings illustrated the ability to detect GABA at the physiological pH (pH = 7.4) without adjusting the pH value, opening the door for real applications. Furthermore, the sensor could detect various GABA concentrations in human serum with good recovery percentages (98% to 101.4%). In addition, this assay was applied to monitor GABA release from the SH-SY5Y cell line to convert glutamate into GABA. This result indicates the capability of the proposed assay for visually monitoring the release of GABA neurotransmitters.
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Affiliation(s)
- Waleed A El-Said
- Department of Chemistry, College of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia; Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 121-742, Republic of Korea; Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Ramy M Qaisi
- University of Jeddah, College of Engineering, Department of Electrical and Electronic Engineering, P.O. Box 80327, Jeddah 21589, Saudi Arabia
| | - Virginie Placide
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 121-742, Republic of Korea
| | - Jeong-Woo Choi
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 121-742, Republic of Korea.
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El-Said WA, Al-Bogami AS, Alshitari W. Synthesis of gold nanoparticles@reduced porous graphene-modified ITO electrode for spectroelectrochemical detection of SARS-CoV-2 spike protein. Spectrochim Acta A Mol Biomol Spectrosc 2022; 264:120237. [PMID: 34352502 PMCID: PMC8327772 DOI: 10.1016/j.saa.2021.120237] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 07/01/2021] [Accepted: 07/26/2021] [Indexed: 05/05/2023]
Abstract
Here, we reported the synthesis of reduced porous graphene oxide (rPGO) decorated with gold nanoparticles (Au NPs) to modify the ITO electrode. Then we used this highly uniform Au NPs@rPGO modified ITO electrode as a surface-enhanced Raman spectroscopy-active surface and a working electrode. The uses of the Au nanoparticles and porous graphene enhance the Raman signals and the electrochemical conductivity. COVID-19 protein-based biosensor was developed based on immobilization of anti-COVID-19 antibodies onto the modified electrode and its uses as a probe for capturing the COVID-19 protein. The developed biosensor showed the capability of monitoring the COVID-19 protein within a concentration range from 100 nmol/L to 1 pmol/L with a limit of detection (LOD) of 75 fmol/L. Furthermore, COVID-19 protein was detected based on electrochemical techniques within a concentration range from 100 nmol/L to 500 fmol/L that showed a LOD of 39.5 fmol/L. Finally, three concentrations of COVID-19 protein spiked in human serum were investigated. Thus, the present sensor showed high efficiency towards the detection of COVID-19.
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Affiliation(s)
- Waleed A El-Said
- Department of Chemistry, College of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia.
| | - Abdullah S Al-Bogami
- Department of Chemistry, College of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia
| | - Wael Alshitari
- Department of Chemistry, College of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia
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Tolan DA, Elshehy EA, El-Said WA, Taketsugu T, Yoshizawa K, El-Nahas AM, Kamali AR, Abdelkader AM. Cubically cage-shaped mesoporous ordered silica for simultaneous visual detection and removal of uranium ions from contaminated seawater. Mikrochim Acta 2021; 189:3. [PMID: 34855016 DOI: 10.1007/s00604-021-05083-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 10/25/2021] [Indexed: 12/14/2022]
Abstract
A dual-function organic-inorganic mesoporous structure is reported for naked-eye detection and removal of uranyl ions from an aqueous environment. The mesoporous sensor/adsorbent is fabricated via direct template synthesis of highly ordered silica monolith (HOM) starting from a quaternary microemulsion liquid crystalline phase. The produced HOM is subjected to further modifications through growing an organic probe, omega chrome black blue G (OCBBG), in the cavities and on the outer surface of the silica structure. The spectral response for [HOM-OCBBG → U(VI)] complex shows a maximum reflectance at λmax = 548 nm within 1 min response time (tR); the LOD is close to 9.1 μg/L while the LOQ approaches 30.4 μg/L, and this corresponds to the range of concentration where the signal is linear against U(VI) concentration (i.e., 5-1000 μg/L) at pH 3.4 with standard deviation (SD) of 0.079 (RSD% = 11.7 at n = 10). Experiments and DFT calculations indicate the existence of strong binding energy between the organic probe and uranyl ions forming a complex with blue color that can be detected by naked eyes even at low uranium concentrations. With regard to the radioactive remediation, the new mesoporous sensor/captor is able to reach a maximum capacity of 95 mg/g within a few minutes of the sorption process. The synthesized material can be regenerated using simple leaching and re-used several times without a significant decrease in capacity.
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Affiliation(s)
- Dina A Tolan
- Department of Chemistry, College of Science and Humanities, Prince Sattam bin Abdulaziz University, Alkharj, 11942, Saudi Arabia.,Chemistry Department, Faculty of Science, Menoufia University, Menoufia, Egypt
| | | | - Waleed A El-Said
- Department of Chemistry, Faculty of Science, Assiut University, Assiut, 71516, Egypt.,Department of Chemistry, College of Science, University of Jeddah, P.O. Box 80327, Jeddah, 21589, Saudi Arabia
| | - Tetsuya Taketsugu
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, 060-0810, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Ahmed M El-Nahas
- Department of Chemistry, College of Science and Humanities, Prince Sattam bin Abdulaziz University, Alkharj, 11942, Saudi Arabia
| | - Ali Reza Kamali
- Energy and Environmental Materials Research Centre (E2MC), School of Metallurgy, Northeastern University, Shenyang, 110819, People's Republic of China
| | - Amr M Abdelkader
- Department of Engineering, Bournemouth University, Talbot Campus, Fern Barrow, Poole, BH12 5BB, UK.
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Kim M, Xu X, Xin R, Earnshaw J, Ashok A, Kim J, Park T, Nanjundan AK, El-Said WA, Yi JW, Na J, Yamauchi Y. KOH-Activated Hollow ZIF-8 Derived Porous Carbon: Nanoarchitectured Control for Upgraded Capacitive Deionization and Supercapacitor. ACS Appl Mater Interfaces 2021; 13:52034-52043. [PMID: 34459576 DOI: 10.1021/acsami.1c09107] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Herein, the synergistic effects of hollow nanoarchitecture and high specific surface area of hollow activated carbons (HACs) are reported with the superior supercapacitor (SC) and capacitive deionization (CDI) performance. The center of zeolite imidazolate framework-8 (ZIF-8) is selectively etched to create a hollow cavity as a macropore, and the resulting hollow ZIF-8 (HZIF-8) is carbonized to obtain hollow carbon (HC). The distribution of nanopores is, subsequently, optimized by KOH activation to create more nanopores and significantly increase specific surface area. Indeed, as-prepared hollow activated carbons (HACs) show significant improvement not only in the maximum specific capacitance and desalination capacity but also capacitance retention and mean desalination rates in SC and CDI, respectively. As a result, it is confirmed that well-designed nanoarchitecture and porosity are required to allow efficient diffusion and maximum electrosorption of electrolyte ions.
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Affiliation(s)
- Minjun Kim
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Xingtao Xu
- JST-ERATO Yamauchi Materials Space-Tectonics Project and International Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Ruijing Xin
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jacob Earnshaw
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Aditya Ashok
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jeonghun Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Teahoon Park
- Carbon Composite Department, Composites Research Division, Korea Institute of Materials Science (KIMS), 797, Changwon-daero, Seongsan-gu, Changwon-si 51508, Gyeongsangnam-do Republic of Korea
| | - Ashok Kumar Nanjundan
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Waleed A El-Said
- Department of Chemistry, College of Science, University of Jeddah, P.O. 80327, Jeddah, 21589, Saudi Arabia
- Department of Chemistry, Faculty of Science, Assiut University, Assiut, 71516, Egypt
| | - Jin Woo Yi
- Carbon Composite Department, Composites Research Division, Korea Institute of Materials Science (KIMS), 797, Changwon-daero, Seongsan-gu, Changwon-si 51508, Gyeongsangnam-do Republic of Korea
| | - Jongbeom Na
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Yusuke Yamauchi
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia
- JST-ERATO Yamauchi Materials Space-Tectonics Project and International Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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El-Said WA, Al‐Bogami AS, Alshitari W, El-Hady DA, Saleh TS, El-Mokhtar MA, Choi JW. Electrochemical Microbiosensor for Detecting COVID-19 in a Patient Sample Based on Gold Microcuboids Pattern. Biochip J 2021; 15:287-295. [PMID: 34394845 PMCID: PMC8350553 DOI: 10.1007/s13206-021-00030-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [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: 04/06/2021] [Revised: 06/14/2021] [Accepted: 06/18/2021] [Indexed: 01/04/2023]
Abstract
As continues increasing the COVID-19 infections, there is an urgent need for developing fast, simple, selective, and accurate COVID-19 biosensors. A highly uniform gold (Au) microcuboid pattern was used as a microelectrode that allowed monitoring a small analyte. The electrochemical biosensor was used to monitor the COVID-19 S protein within a concentration range from 100 to 5 pmol L−1; it showed a lower detection limit of 276 fmol L−1. Finally, the developed COVID-19 sensor was used to detect a positive sample from a human patient obtained through a nasal swab; the results were confirmed using the PCR technique. The results showed that the SWV technique showed high sensitivity towards detecting COVID-19 and good efficiency for detecting COVID-19 in a positive human sample.
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Affiliation(s)
- Waleed A. El-Said
- Department of Chemistry, College of Science, University of Jeddah, P.O. Box 80327, Jeddah, 21589 Saudi Arabia
| | - Abdullah S. Al‐Bogami
- Department of Chemistry, College of Science, University of Jeddah, P.O. Box 80327, Jeddah, 21589 Saudi Arabia
| | - Wael Alshitari
- Department of Chemistry, College of Science, University of Jeddah, P.O. Box 80327, Jeddah, 21589 Saudi Arabia
| | - Deia A. El-Hady
- Department of Chemistry, College of Science, University of Jeddah, P.O. Box 80327, Jeddah, 21589 Saudi Arabia
| | - Tamer S. Saleh
- Department of Chemistry, College of Science, University of Jeddah, P.O. Box 80327, Jeddah, 21589 Saudi Arabia
| | - Mohamed A. El-Mokhtar
- Department of Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, 71515 Egypt
| | - Jeong-Woo Choi
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul, 04107 Republic of Korea
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Althagafi II, Ahmed SA, El-Said WA. Colorimetric aflatoxins immunoassay by using silica nanoparticles decorated with gold nanoparticles. Spectrochim Acta A Mol Biomol Spectrosc 2021; 246:118999. [PMID: 33038860 DOI: 10.1016/j.saa.2020.118999] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/14/2020] [Accepted: 09/21/2020] [Indexed: 06/11/2023]
Abstract
Nanomaterials-based colorimetric immunoassays showed increasing attention for monitoring different biomarkers because of their unique optical and electrical features. Here, a highly sensitive and selective optical sensor was described for the determination of different aflatoxins (AFs). Mesoporous silica nanoparticles (m-SNPs) with an average particle size of 40 nm were prepared by the sol-gel method and then decorated with gold nanoparticles (AuNPs). The Au NPs@m-SiNPs nanocomposite with an average particle size of 66 nm was modified with AFs antibodies. The assay includes the following steps: the Au NPs@m-SiNPs nanocomposite was immersed with AFs antibodies, and then the AFs-Ab/Au NPs@m-SiNPs was used as a probe for AFs detection. The interaction between the AFs-Ab/Au NPs@m-SiNPs and the AFs has resulted in a change in its color from pink to violet. Measurements are performed by absorptiometry at a wavelength of 425 nm. The immunoassay works in the concentration range from 1 ng·mL-1 to 75 ng·mL-1 AFB1 and has a limit of detection 0.16 ng·mL-1 (at S/N = 3). The assay was applied to the determination of AFs in different food samples spiked with AFS. Finally, the assay was used to detect AFs in a real sample, and the LC-MS technique was used to verify the results.
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Affiliation(s)
- Ismail I Althagafi
- Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
| | - Saleh A Ahmed
- Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, 21955 Makkah, Saudi Arabia; Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt.
| | - Waleed A El-Said
- Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt.
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Hussein MA, Alamry KA, El Shishtawy RM, Elshehy EA, El-Said WA. Nanoporous colorant sensors and captors for simultaneous recognition and recovery of gold from E-wastes. Waste Manag 2020; 116:166-178. [PMID: 32799098 DOI: 10.1016/j.wasman.2020.07.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 07/11/2020] [Accepted: 07/18/2020] [Indexed: 06/11/2023]
Abstract
Platinum group metals have gained significant interest due to their unique characteristics, which make them the main constituents in advanced applications. In this work, we introduce new pH-dependent optical mesocaptors for the colorimetric monitoring and separation of Au(III) from E-waste leach liquors without a preconcentration process. The mesoporous silica nanospheres are fabricated via simple, reproducible, and low-cost procedures. The optical mesocaptor is designed via indirect immobilization of thiazole yellow G (TYG) and amacid yellow M (AYM) chromogenic probes onto mesoporous nanostructured scaffolds. The silanol groups in the mesopores of silica surface robustly anchored dilauryl dimethyl ammonium bromide (DDAB) linker to induce the interactions with the TYG and AYM chelates, thereby leading to the fashioning of a stable optical mesocaptors without releasing of the chelates throughout adsorption and sensing assays. The finding provides evidence of the capability of the synthesized decorated new nanostructured sensor shows excellent sensitivity toward Au(III) with a limit of detection (LOD) as low as 1.16 µg L-1. Furthermore, the new sensors were able to selectively detect Au(III) in solution with multi ions components.
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Affiliation(s)
- Mahmoud A Hussein
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Khalid A Alamry
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Reda M El Shishtawy
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | | | - Waleed A El-Said
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt; University of Jeddah, College of Science, Department of Chemistry, P.O. Box 80327, Jeddah 21589, Saudi Arabia
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Zakaria MB, Guo Y, Na J, Tahawy R, Chikyow T, El-Said WA, El-Hady DA, Alshitari W, Yamauchi Y, Lin J. Layer-by-Layer Motif Heteroarchitecturing of N,S-Codoped Reduced Graphene Oxide-Wrapped Ni/NiS Nanoparticles for the Electrochemical Oxidation of Water. ChemSusChem 2020; 13:3269-3276. [PMID: 32133787 DOI: 10.1002/cssc.202000159] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 02/21/2020] [Indexed: 06/10/2023]
Abstract
A new heterostructured material is synthesized with lamellar arrangements in nanoscale precision through an innovative synthetic approach. The self-assembled Ni-based cyano-bridged coordination polymer flakes (Ni-CP) and graphene oxide (GO) nanosheets with a layered morphology (Ni-CP/GO) are used as precursors for the synthesis of multicomponent hybrid materials. Annealing of Ni-CP/GO in nitrogen at 450 °C allows the formation of Ni3 C/rGO nanocomposites. Grinding Ni-CP/GO and thiourea and annealing under the same conditions produces N,S-codoped reduced GO-wrapped NiS2 flakes (NiS2 /NS-rGO). Interestingly, further heating up to 550 °C allows the phase transformation of NiS2 into NiS accompanied by the formation of a face-centered cubic (FCC-Ni) metal phase between NS-rGO layers (FCC-Ni-NiS/NS-rGO). Among all the materials, the resulting FCC-Ni-NiS/NS-rGO exhibits good electrocatalytic activity and stability toward the oxygen evolution reaction (OER) owing to the synergistic effect of multiphases, the well-designed alternating layered structures on the nanoscale with abundant active sites.
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Affiliation(s)
- Mohamed Barakat Zakaria
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology (QUST), Qingdao, 266042, China
- Department of Chemistry, Faculty of Science, Tanta University, Tanta, Gharbeya, 31527, Egypt
- International Research Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Yanna Guo
- International Research Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Jongbeom Na
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology (QUST), Qingdao, 266042, China
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Rafat Tahawy
- International Research Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Toyohiro Chikyow
- Materials Data & Integrated System (MaDIS), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
| | - Waleed A El-Said
- Department of Chemistry, College of Science, University of Jeddah, P.O. 80327, Jeddah, 21589, Saudi Arabia
| | - Deia A El-Hady
- Department of Chemistry, College of Science, University of Jeddah, P.O. 80327, Jeddah, 21589, Saudi Arabia
| | - Wael Alshitari
- Department of Chemistry, College of Science, University of Jeddah, P.O. 80327, Jeddah, 21589, Saudi Arabia
| | - Yusuke Yamauchi
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology (QUST), Qingdao, 266042, China
- International Research Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 446-701, South Korea
| | - Jianjian Lin
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology (QUST), Qingdao, 266042, China
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Hussein MA, El-Said WA, Abu-Zied BM, Choi JW. Nanosheet composed of gold nanoparticle/graphene/epoxy resin based on ultrasonic fabrication for flexible dopamine biosensor using surface-enhanced Raman spectroscopy. Nano Converg 2020; 7:15. [PMID: 32367260 PMCID: PMC7198691 DOI: 10.1186/s40580-020-00225-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 04/16/2020] [Indexed: 05/17/2023]
Abstract
Construction of a fast, easy and sensitive neurotransmitters-based sensor could provide a promising way for the diagnosis of neurological diseases, leading to the discovery of more effective treatment methods. The current work is directed to develop for the first time a flexible Surface-Enhanced Raman Spectroscopy (SERS) based neurotransmitters sensor by using the ultrasonic-assisted fabrication of a new set of epoxy resin (EPR) nanocomposites based on graphene nanosheets (GNS) using the casting technique. The perspicuous epoxy resin was reinforced by the variable loading of GNS giving the general formula GNS/EPR1-5. The designed products have been fabricated in situ while the perspicuous epoxy resin was formed. The expected nanocomposites have been fabricated using 3%, 5%, 10%, 15% and 20% GNS loading was applied for such fabrication process. The chemical, physical and morphological properties of the prepared nanocomposites were investigated by using Fourier transforms infrared spectroscopy, X-ray diffraction, Thermogravimetric analysis, Differential Thermal gravimetry, and field emission scanning electron microscopy methods. The GNS/EPR1-5 nanocomposites were decorated with a layer of gold nanoparticles (Au NPs/GNS/EPR) to create surface-enhanced Raman scattering hot points. The wettability of the Au NPs/GNS/EPR was investigated in comparison with the different nanocomposites and the bare epoxy. Au NPs/GNS/EPR was used as a SERS-active surface for detecting different concentrations of dopamine with a limit of detection of 3.3 µM. Our sensor showed the capability to detect low concentrations of dopamine either in a buffer system or in human serum as a real sample.
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Affiliation(s)
- Mahmoud A Hussein
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia.
- Chemistry Department, Faculty of Science, Assiut University, Assiut, 71516, Egypt.
| | - Waleed A El-Said
- Chemistry Department, Faculty of Science, Assiut University, Assiut, 71516, Egypt.
- College of Science, Department of Chemistry, University of Jeddah, P.O. Box 80327, Jeddah, 21589, Saudi Arabia.
| | - Bahaa M Abu-Zied
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
- Chemistry Department, Faculty of Science, Assiut University, Assiut, 71516, Egypt
- Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Jeong-Woo Choi
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul, 04107, Republic of Korea
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15
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El-Said WA, Abdelshakour M, Choi JH, Choi JW. Application of Conducting Polymer Nanostructures to Electrochemical Biosensors. Molecules 2020; 25:E307. [PMID: 31940924 PMCID: PMC7024285 DOI: 10.3390/molecules25020307] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 01/10/2020] [Accepted: 01/10/2020] [Indexed: 01/11/2023] Open
Abstract
Over the past few decades, nanostructured conducting polymers have received great attention in several application fields, including biosensors, microelectronics, polymer batteries, actuators, energy conversion, and biological applications due to their excellent conductivity, stability, and ease of preparation. In the bioengineering application field, the conducting polymers were reported as excellent matrixes for the functionalization of various biological molecules and thus enhanced their performances as biosensors. In addition, combinations of metals or metal oxides nanostructures with conducting polymers result in enhancing the stability and sensitivity as the biosensing platform. Therefore, several methods have been reported for developing homogeneous metal/metal oxide nanostructures thin layer on the conducting polymer surfaces. This review will introduce the fabrications of different conducting polymers nanostructures and their composites with different shapes. We will exhibit the different techniques that can be used to develop conducting polymers nanostructures and to investigate their chemical, physical and topographical effects. Among the various biosensors, we will focus on conducting polymer-integrated electrochemical biosensors for monitoring important biological targets such as DNA, proteins, peptides, and other biological biomarkers, in addition to their applications as cell-based chips. Furthermore, the fabrication and applications of the molecularly imprinted polymer-based biosensors will be addressed in this review.
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Affiliation(s)
- Waleed A. El-Said
- Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt; (W.A.E.-S.); (M.A.)
| | - Muhammad Abdelshakour
- Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt; (W.A.E.-S.); (M.A.)
| | - Jin-Ha Choi
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 04107, Korea;
| | - Jeong-Woo Choi
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 04107, Korea;
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16
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Elkhawaga AA, Khalifa MM, El-Badawy O, Hassan MA, El-Said WA. Rapid and highly sensitive detection of pyocyanin biomarker in different Pseudomonas aeruginosa infections using gold nanoparticles modified sensor. PLoS One 2019; 14:e0216438. [PMID: 31361746 PMCID: PMC6667159 DOI: 10.1371/journal.pone.0216438] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 07/17/2019] [Indexed: 12/19/2022] Open
Abstract
Successful antibiotic treatment of infections relies on accurate and rapid identification of the infectious agents. Pseudomonas aeruginosa is implicated in a wide range of human infections that mostly become complicated and life threating, especially in immunocompromised and critically ill patients. Conventional microbiological methods take more than three days to obtain accurate results. Pyocyanin is a distinctive electroactive biomarker for Pseudomonas aeruginosa. Here, we have prepared polyaniline/gold nanoparticles decorated ITO electrode and tested it to establish a rapid, diagnostic and highly sensitive pyocyanin sensor in a culture of Pseudomonas aeruginosa clinical isolates with high selectivity for traces of pyocyanin when measured in the existence of different interferences like vitamin C, uric acid, and glucose. The scanning electron microscopy and cyclic voltammetry techniques were used to characterize the morphology and electrical conductivity of the constructed electrode. The determined linear range for pyocyanin detection was from 238 μM to 1.9 μM with a detection limit of 500 nM. Compared to the screen-printed electrode used before, the constructed electrode showed a 4-fold enhanced performance. Furthermore, PANI/Au NPs/ITO modified electrodes have demonstrated the ability to detect pyocyanin directly in Pseudomonas aeruginosa culture without any potential interference with other species.
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Affiliation(s)
- Amal A Elkhawaga
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Marwa M Khalifa
- Department of Microbiology and Immunology, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Omnia El-Badawy
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Mona A Hassan
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Waleed A El-Said
- Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt
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17
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El-Said WA, Choi JW. High selective spectroelectrochemical biosensor for HCV-RNA detection based on a specific peptide nucleic acid. Spectrochim Acta A Mol Biomol Spectrosc 2019; 217:288-293. [PMID: 30952095 DOI: 10.1016/j.saa.2019.03.115] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 03/28/2019] [Accepted: 03/29/2019] [Indexed: 06/09/2023]
Abstract
Hepatitis C virus (HCV) is a blood-borne virus that causes infectious chronic hepatitis. Egypt has the largest epidemic of HCV in the world, with about 14.7% of the Egyptian population. Thus, HCV, which could cause severe risks for human health including liver failure, becomes a public health concern for Egyptians. Development of highly selective and sensitive biosensors for accurate detection of HCV levels without extensive sample preparation has received great attention. The present work reported on developing a new rapid, highly selective and highly selective HCV-based biosensor for early detection of HCV-RNA extracted from clinical samples. The HCV-based biosensor was constructed by fabrication of gold nanodots/indium tin oxide substrate and followed by immobilization of a specific peptide nucleic acid (as bio-receptors) terminated with thiol group onto gold nanodots/indium tin oxide. The principle of the developed biosensor was based on the selective hybridization between the peptide nucleic acid and the HCV-RNA at the untranslated regions (5'-UTR). Raman spectroscopy and Square wave voltammetry techniques were used to monitor the interaction between the HCV-RNA and the immobilized peptide nucleic acid. The reported HCV-biosensor demonstrated a high capability to detect HCV-RNA.
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Affiliation(s)
- Waleed A El-Said
- Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt.
| | - Jeong-Woo Choi
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 04107, Republic of Korea
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18
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Yousif AM, Zaid OF, El-Said WA, Elshehy EA, Ibrahim IA. Silica Nanospheres-Coated Nanofibrillated Cellulose for Removal and Detection of Copper(II) Ions in Aqueous Solutions. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b06343] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ahmed M. Yousif
- Chemistry Department, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt
- Chemistry Department, College of Science and Arts, Jouf University, Alqurayyat, Saudi Arabia
| | - Osama F. Zaid
- Chemistry Department, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt
| | - Waleed A. El-Said
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
- Chemistry Department, Faculty of Science, University of Jeddah, P.O. 80327, Jeddah 21589, Saudi Arabia
| | - Emad A. Elshehy
- Nuclear Materials Authority, P.O. Box 530,
Maadi, Cairo, Egypt
| | - Ibrahim A. Ibrahim
- Central Metallurgical Research & Development Institute (CMRDI), Helwan 11421, Egypt
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19
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Khan F, Akhtar N, Jalal N, Hussain I, Szmigielski R, Hayat MQ, Ahmad HB, El-Said WA, Yang M, Janjua HA. Carbon-dot wrapped ZnO nanoparticle-based photoelectrochemical sensor for selective monitoring of H 2O 2 released from cancer cells. Mikrochim Acta 2019; 186:127. [PMID: 30684013 DOI: 10.1007/s00604-019-3227-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 01/04/2019] [Indexed: 11/30/2022]
Abstract
This study reports on a simple approach for the fabrication of an electrode modified with biocompatible C-dot wrapped ZnO nanoparticles for selective photoelectrochemical monitoring of H2O2 released from living cells. The biocompatibility of the ZnO nanoparticles was confirmed through in-vitro cellular testing using the MTT assay on Huh7 cell lines. The ZnO nanoparticles wrapped with dopamine-derived C-dots possess numerous catalytically active sites, excessive surface defects, good electrical conductivity, and efficient separation ability of photo-induced electrons and holes. These properties offer highly sensitive and selective non-enzymatic photo-electrochemical monitoring of H2O2 released from HeLa cells after stimulation with N-formylmethionyl-leucyl-phenylalanine. The sensor has a wide linear range (20-800 nM), low detection limit (2.4 nM), and reliable reproducibility, this implying its suitability for biological and biomedical applications. Graphical abstract Schematic of the fabrication of ZnO nanoparticles by using a plant extract as a reducing agent. Wrapping of ZnO with C-dots enhances the photoelectrocatalytic efficacy. Sensitive and selective photoelectrochemical monitoring of H2O2 released from cancer cells is demonstrated.
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Affiliation(s)
- Faria Khan
- Department of Industrial Biotechnology, Atta ur Rahman School of Applied Biosciences, National University of Science Technology (NUST), Islamabad, 44000, Pakistan.,Department of Plant Biotechnology, Atta ur Rahman School of Applied Biosciences, National University of Science Technology (NUST), Islamabad, 44000, Pakistan.,Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Naeem Akhtar
- Interdisciplinary Research Center in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus, Lahore, 54000, Pakistan. .,National Institute for Materials Science (NIMS), 1-2-1 Sengen, 305-0047, Tsukuba-shi, Ibaraki-ken, Japan.
| | - Nasir Jalal
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin Shi, 300072, China
| | - Irshad Hussain
- Department of Chemistry, SBA School of Science & Engineering (SBASSE), Lahore University of Management Sciences (LUMS), DHA, Lahore, 54792, Pakistan
| | - Rafal Szmigielski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Muhammad Qasim Hayat
- Department of Chemistry, SBA School of Science & Engineering (SBASSE), Lahore University of Management Sciences (LUMS), DHA, Lahore, 54792, Pakistan
| | - Hafiz B Ahmad
- Interdisciplinary Research Center in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus, Lahore, 54000, Pakistan
| | - Waleed A El-Said
- Department of Chemistry, Faculty of Science, Assiut University, Assiut, 71516, Egypt
| | - Minghui Yang
- Solid State Functional Materials Research Laboratory, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences (CAS), Ningbo, 315201, Zhejiang, China.
| | - Hussnain Ahmed Janjua
- Department of Industrial Biotechnology, Atta ur Rahman School of Applied Biosciences, National University of Science Technology (NUST), Islamabad, 44000, Pakistan.
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20
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Althagafi II, Ahmed SA, El-Said WA. Fabrication of gold/graphene nanostructures modified ITO electrode as highly sensitive electrochemical detection of Aflatoxin B1. PLoS One 2019; 14:e0210652. [PMID: 30650140 PMCID: PMC6334944 DOI: 10.1371/journal.pone.0210652] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Accepted: 12/28/2018] [Indexed: 02/07/2023] Open
Abstract
Aflatoxins (AFs) are a family of fungal toxins that produced in food and feed by two Aspergillus species (Aspergillus flavus and Aspergillus parasiticus). Several techniques have been reported for AFs detection including high-pressure liquid chromatography, enzyme-linked immunosorbent assay, surface plasmon resonance and recombinant immune blotting assay. But, these methods are disadvantaged because they consumed a long time for analysis; in addition, they required a piece of complicated and expensive equipment. Therefore, developing of inexpensive sensors with high selectivity and sensitivity for detecting of AFs levels without extensive sample preparation has received great attention. Several electrochemical AFs sensors have been reported; however, there is still a need for developing a new, simple and rapid electrochemical AFs sensor. Here, we have developed a new AFs sensor based on Au nanostructures/graphene nanosheets modified ITO substrate that could enhance the Raman effect and the electrochemical conductivity. The modified electrode was prepared based on layer-by-layer electrochemical deposition method. AFs antibody was immobilized onto the Au nanostructures/graphene nanosheets; then it was used as a probe for rapid, simple and cheap detection of AFs level using Raman spectroscopy and electrochemical techniques. Our results demonstrated that the developed system showed a simple, easy and sensitive sensor for monitoring low concentrations of AFB1 with a detection limit of about 6.9 pg/mL, also it allowed the determination of AFB1 in spiked food samples.
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Affiliation(s)
- Ismail I. Althagafi
- Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
- * E-mail:
| | - Saleh A. Ahmed
- Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
- Department of Chemistry, Faculty of Science, Assiut University, Assiut, Egypt
| | - Waleed A. El-Said
- Department of Chemistry, Faculty of Science, Assiut University, Assiut, Egypt
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Affiliation(s)
- AbdElazim M. Mebed
- Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Alaa M. Abd-Elnaiem
- Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Waleed A. El-Said
- Department of Chemistry, Faculty of Science, Assiut University, Assiut, 71516, Egypt
| | - Tesleem B. Asafa
- Department of Mechanical Engineering, Ladoke Akintola University of Technology, PMB 4000 Ogbomoso, Nigeria
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22
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El-Said WA, Abdel-Shakour M, Abd-Elnaiem AM. An efficient and low-cost photoanode for backside illuminated dye-sensitized solar cell using 3D porous alumina. Materials Letters 2018; 222:126-130. [DOI: 10.1016/j.matlet.2018.03.191] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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23
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El-Said WA, Moharram AS, Hussein EM, El-Khawaga AM. Synthesis, Characterization, and Applications of Some New Trimeric-Type Cationic Surfactants. J SURFACTANTS DETERG 2018. [DOI: 10.1002/jsde.12041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Waleed A. El-Said
- Department of Chemistry, Faculty of Science; Assiut University; Assiut 71516 Egypt
| | - Ahmed S. Moharram
- Department of Chemistry, Faculty of Science; Assiut University; Assiut 71516 Egypt
| | - Essam M. Hussein
- Department of Chemistry, Faculty of Science; Assiut University; Assiut 71516 Egypt
| | - Ahmed M. El-Khawaga
- Department of Chemistry, Faculty of Science; Assiut University; Assiut 71516 Egypt
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24
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El-Said WA, Yoon J, Choi JW. Nanostructured surfaces for analysis of anticancer drug and cell diagnosis based on electrochemical and SERS tools. Nano Converg 2018; 5:11. [PMID: 29721403 PMCID: PMC5913382 DOI: 10.1186/s40580-018-0143-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Accepted: 04/12/2018] [Indexed: 05/22/2023]
Abstract
Discovering new anticancer drugs and screening their efficacy requires a huge amount of resources and time-consuming processes. The development of fast, sensitive, and nondestructive methods for the in vitro and in vivo detection of anticancer drugs' effects and action mechanisms have been done to reduce the time and resources required to discover new anticancer drugs. For the in vitro and in vivo detection of the efficiency, distribution, and action mechanism of anticancer drugs, the applications of electrochemical techniques such as electrochemical cell chips and optical techniques such as surface-enhanced Raman spectroscopy (SERS) have been developed based on the nanostructured surface. Research focused on electrochemical cell chips and the SERS technique have been reviewed here; electrochemical cell chips based on nanostructured surfaces have been developed for the in vitro detection of cell viability and the evaluation of the effects of anticancer drugs, which showed the high capability to evaluate the cytotoxic effects of several chemicals at low concentrations. SERS technique based on the nanostructured surface have been used as label-free, simple, and nondestructive techniques for the in vitro and in vivo monitoring of the distribution, mechanism, and metabolism of different anticancer drugs at the cellular level. The use of electrochemical cell chips and the SERS technique based on the nanostructured surface should be good tools to detect the effects and action mechanisms of anticancer drugs.
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Affiliation(s)
- Waleed A. El-Said
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul, 04375 Republic of Korea
- Department of Chemistry, Faculty of Science, Assiut University, Assiut, 71516 Egypt
| | - Jinho Yoon
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul, 04375 Republic of Korea
| | - Jeong-Woo Choi
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul, 04375 Republic of Korea
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Osman AH, El-Said WA, El-Shakour MA. Synthesis and characterization of some new ruthenium (II) complexes as photosensitizers in dye-sensitized solar cells. JAC 2017; 12:4413-4426. [DOI: 10.24297/jac.v12i5.6265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
New ruthenium (II) complexes, [Ru(DHZ)2(bpy)], [Ru(SCN)2(bpy)(DMSO)2], [Ru(SCN)2(dmbpy)(DMSO)2] and [RuCl2(salen)]-2, where bpy = 2,2'- bipyridine, DHZ = 1,5-diphenylthiocarbazone, dmbpy = 4,4'-dimethyl-2,2' bipyridine and salen = 2,2'- ethylenebis(nitrilomethylidene)diphenol were synthesized and characterized by elemental analysis, FTIR, UV-Vis spectroscopy and thermal analysis. From data of these investigations the structural formula and the mode of bonding were obtained. These complexes were successfully applied to sensitization of nano-crystalline TiO2 based solar cells (DSSCs). The photovoltaic efficiencies of the studied DSSCs increase in the following order [Ru(DHZ)2(bpy)]< [Ru(SCN)2(bpy)(DMSO)2]< [Ru(SCN)2(dmbpy)(DMSO)2]< [RuCl2(salen)]-2. This increase is in agreement with the light harvesting of these complexes as indicated from their absorption spectra. Ferrioxalate complex enhanced the performance of some investigated cells. Therefore, a mechanism of this improvement has been postulated. Polyaniline as well as iodine doped polyaniline modified FTO electrode has been tested as promising counter electrodes. The efficiencies of the cells using iodine doped polyaniline is higher than that of polyaniline, which is assignable to the high conductivity of iodine.
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26
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El-Said WA, Abd El-Hameed K, Abo El-Maali N, Sayyed HG. Label-free Electrochemical Sensor for Ex-vivo Monitoring of Alzheimer's Disease Biomarker. ELECTROANAL 2016. [DOI: 10.1002/elan.201600467] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Waleed A. El-Said
- Department of Chemistry; Faculty of Science; Assiut University; Assiut 71516 Egypt
| | | | - Nagwa Abo El-Maali
- Department of Chemistry; Faculty of Science; Assiut University; Assiut 71516 Egypt
| | - Hayam G. Sayyed
- Department of Medical Physiology; Faculty of Medicine; Assiut University, Egypt
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Kim TH, Lee T, El-Said WA, Choi JW. Graphene-Based Materials for Stem Cell Applications. Materials (Basel) 2015; 8:8674-8690. [PMID: 28793737 PMCID: PMC5458813 DOI: 10.3390/ma8125481] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 11/18/2015] [Accepted: 12/01/2015] [Indexed: 12/11/2022]
Abstract
Although graphene and its derivatives have been proven to be suitable for several biomedical applications such as for cancer therapy and biosensing, the use of graphene for stem cell research is a relatively new area that has only recently started to be investigated. For stem cell applications, graphene has been utilized by itself or in combination with other types of materials such as nanoparticles, nanofibers, and polymer scaffolds to take advantage of the several unique properties of graphene, such as the flexibility in size, shape, hydrophilicity, as well as its excellent biocompatibility. In this review, we will highlight a number of previous studies that have investigated the potential of graphene or its derivatives for stem cell applications, with a particular focus on guiding stem cell differentiation into specific lineages (e.g., osteogenesis, neurogenesis, and oligodendrogenesis), promoting stem cell growth, stem cell delivery/transplantation, and effective monitoring of their differentiation. We hope that this review promotes and accelerates the use of graphene-based materials for regenerative therapies, especially for stem cell-based approaches to cure various incurable diseases/disorders such as neurological diseases (e.g., Alzheimer's disease and Parkinson's disease), stroke, spinal cord injuries, bone/cartilage defects, and cardiovascular diseases.
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Affiliation(s)
- Tae-Hyung Kim
- School of Integrative Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea.
| | - Taek Lee
- Interdisciplinary Program of Integrated Biotechnology, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Korea.
| | - Waleed A El-Said
- Interdisciplinary Program of Integrated Biotechnology, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Korea.
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt.
| | - Jeong-Woo Choi
- Interdisciplinary Program of Integrated Biotechnology, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Korea.
- Department of Chemical & Biomolecular Engineering, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Korea.
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Fouad DM, El-Said WA, Mohamed MB. Spectroscopic characterization of magnetic Fe3O4@Au core shell nanoparticles. Spectrochim Acta A Mol Biomol Spectrosc 2015; 140:392-397. [PMID: 25617979 DOI: 10.1016/j.saa.2014.12.097] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Revised: 12/01/2014] [Accepted: 12/28/2014] [Indexed: 06/04/2023]
Abstract
The magnetic nanoparticles iron oxide (Fe3O4) nanoparticles and iron oxide/gold core-shell (Fe3O4/Au) nanoparticles were synthesized and their catalytic photo-degradation activity towards malathion as example of organophosphorus pesticides were reported. Iron oxide (Fe3O4) magnetic nanoparticle was successfully prepared through co-precipitation method by the reduction of ferric chloride (FeCl3) using ascorbic acid. The morphology of the prepared nanoparticles was characterized by the TEM and XRD (X-ray diffraction) techniques. Degradation of 10 ppm of malathion in the presence of these nanoparticles under UV radiation was monitored using (HPLC) and UV-visible spectra. Fe3O4/Au nanoparticles showed higher efficiency in photo-degradation of malathion than Fe3O4 ones.
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Affiliation(s)
- Dina M Fouad
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt.
| | - Waleed A El-Said
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt.
| | - Mona B Mohamed
- National Institute of Laser Enhanced Science, NILES, Cairo University, Egypt.
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El-Said WA, Cho HY, Yea CH, Choi JW. Synthesis of metal nanoparticles inside living human cells based on the intracellular formation process. Adv Mater 2014; 26:910-918. [PMID: 24338869 DOI: 10.1002/adma.201303699] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 10/08/2013] [Indexed: 06/03/2023]
Abstract
Intracellular and extracellular formation of Au and Ag NPs with different sizes and shapes using human cells has been developed as green method, which does not require the use of any reducing agents. Also, the cell lysis is used for production of different metal NPs. Our results demonstrate that treatment of human cells with various metal ions cause cell fixation.
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Affiliation(s)
- Waleed A El-Said
- Interdisciplinary program of Integrated Biotechnology, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul, 121-742, Republic of Korea; Department of Chemistry, Faculty of Science, Assiut University, Assiut, 71516, Egypt
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