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Aftab K, Naseem T, Hussain S, Haq S, Waseem M. Synthesis and characterization of Ag 2O, CoFe 2O 4, GO, and their ternary composite for antibacterial activity. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:4079-4093. [PMID: 35962168 DOI: 10.1007/s11356-022-22516-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
Currently, nanomaterials with exceptional antibacterial activity have become an emerging domain in research. The optimization of nanomaterials against infection causing agents is the next step in dealing with the present-day problem of antibiotics. In this research work, Ag2O, CoFe2O4, and Ag2O/CoFe2O4/rGO are prepared by chemical methods. Ag2O was prepared by co-precipitation method, while solvothermal technique was utilized for the synthesis of CoFe2O4. The ternary nanocomposite was synthesized by a simple in situ reduction using a two-step approach. The structural and morphological properties were studied by UV-Vis spectroscopy, X-ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (SEM), dynamic light scattering (DLS), and Fourier-transform infrared spectroscopy (FTIR). From the X-ray diffraction analysis, the crystallite size is found to be 14 nm, 5 nm, and 6 nm for Ag2O, CoFe2O4, and Ag2O/CoFe2O4/rGO respectively. The synthesized nanomaterials were investigated for antibacterial activities against gram-positive strain Staphylococcus aureus (S. aureus) and gram-negative strain Escherichia coli (E. coli) using Agar well diffusion method. Ag2O and CoFe2O4 showed zones of inhibition (ZOI) of 13 mm and 11 mm against gram positive bacteria while 12 mm against gram negative bacteria respectively, while ternary nanocomposite showed 14 mm and 13 mm of ZOI. The antibacterial activity of nanomaterials showed a gradual increment with an increase in the concentration of the materials. Ag2O, CoFe2O4, and Ag2O/CoFe2O4/rGO showed minimum inhibitory concentration (MIC) values of 4.5, 6.5, and 4.5 μg/mL for S. aureus and 6.5, 7.2, and 4.8 μg/mL for E. coli respectively. Minimum bactericidal concentrations were found to be same as the MIC values. Additionally, a time-kill curve analysis was performed and for ternary nanocomposite; the killing response was most effective as the complete killing was achieved at 3 h of incubation at 3-MIC (9.75 μg/mL). These results demonstrate that all the nanomaterials, as a kind of antibacterial material, have a great potential for a wide range of biomedical applications.
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Affiliation(s)
- Komal Aftab
- Department of Chemistry, COMSATS University Islamabad, Islamabad Campus, Islamabad, Pakistan
| | - Taiba Naseem
- Department of Chemistry, University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan
| | - Shahzad Hussain
- Department of Physics, COMSATS University Islamabad, Islamabad Campus, Islamabad, Pakistan
| | - Sirajul Haq
- Department of Chemistry, University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan
| | - Muhammad Waseem
- Department of Chemistry, COMSATS University Islamabad, Islamabad Campus, Islamabad, Pakistan.
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2
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Anusuyadevi K, Velmathi S. Design strategies of carbon nanomaterials in fluorescent sensing of biomolecules and metal ions -A review. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023] Open
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3
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Roy R, Chacko AR, Abraham T, Korah BK, John BK, Punnoose MS, Mohan C, Mathew B. Recent Advances in Graphitic Carbon Nitrides (g‐C
3
N
4
) as Photoluminescence Sensing Probe: A Review. ChemistrySelect 2022. [DOI: 10.1002/slct.202200876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Richa Roy
- School of Chemical Sciences Mahatma Gandhi University, Priyadarsini Hills PO Kottayam Kerala INDIA 686560
| | - Anu Rose Chacko
- School of Chemical Sciences Mahatma Gandhi University, Priyadarsini Hills PO Kottayam Kerala INDIA 686560
| | | | - Binila K Korah
- School of Chemical Sciences Mahatma Gandhi University, Priyadarsini Hills PO Kottayam Kerala INDIA 686560
| | - Bony K John
- School of Chemical Sciences Mahatma Gandhi University, Priyadarsini Hills PO Kottayam Kerala INDIA 686560
| | - Mamatha Susan Punnoose
- School of Chemical Sciences Mahatma Gandhi University, Priyadarsini Hills PO Kottayam Kerala INDIA 686560
| | - Chitra Mohan
- School of Chemical Sciences Mahatma Gandhi University, Priyadarsini Hills PO Kottayam Kerala INDIA 686560
| | - Beena Mathew
- School of Chemical Sciences Mahatma Gandhi University, Priyadarsini Hills PO Kottayam Kerala INDIA 686560
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Song Y, Feng G, Sun C, Liang Q, Wu L, Yu X, Lei S, Hu W. Ternary Conductance Switching Realized by a Pillar[5]arene-Functionalized Two-Dimensional Imine Polymer Film. Chemistry 2021; 27:13605-13612. [PMID: 34312929 DOI: 10.1002/chem.202101772] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Indexed: 02/05/2023]
Abstract
Nowadays, most manufacturing memory devices are based on materials with electrical bistability (i. e., "0" and "1") in response to an applied electric field. Memory devices with multilevel states are highly desired so as to produce high-density and efficient memory devices. Herein, we report the first multichannel strategy to realize a ternary-state memristor. We make use of the intrinsic sub-nanometer channel of pillar[5]arene and nanometer channel of a two-dimensional imine polymer to construct an active layer with multilevel channels for ternary memory devices. Low threshold voltage, long retention time, clearly distinguishable resistance states, high ON/OFF ratio (OFF/ON1/ON2=1 : 10 : 103 ), and high ternary yield (75 %) were obtained. In addition, the flexible memory device based on 2DPTPAZ+TAPB can maintain its stable ternary memory performance after being bent 500 times. The device also exhibits excellent thermal stability and can tolerate a temperature as high as 300 °C. It is envisioned that the results of this work will open up possibilities for multistate, flexible resistive memories with good thermal stability and low energy consumption, and broaden the application of pillar[n]arene.
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Affiliation(s)
- Yaru Song
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science &, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Guangyuan Feng
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science &, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Chenfang Sun
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science &, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Qiu Liang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science &, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Lingli Wu
- Medical College, Northwest Minzu University, Lanzhou, 730000, P. R. China
| | - Xi Yu
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science &, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Shengbin Lei
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science &, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Wenping Hu
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science &, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
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Jamil S, Nasir M, Ali Y, Nadeem S, Rashid S, Javed MY, Hayat A. Cr 2O 3-TiO 2-Modified Filter Paper-Based Portable Nanosensors for Optical and Colorimetric Detection of Hydrogen Peroxide. ACS OMEGA 2021; 6:23368-23377. [PMID: 34549136 PMCID: PMC8444288 DOI: 10.1021/acsomega.1c03119] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/23/2021] [Indexed: 05/11/2023]
Abstract
In the present approach, a Cr2O3-TiO2-modified, portable, and biomimetic nanosensor was designed to meet the requirement of a robust and colorimetric sensing of hydrogen peroxide. Cr2O3-TiO2 nanocomposites prepared via the hydrothermal method were fabricated as a transducer surface on the filter paper using the sol-gel matrix. The color on the filter paper sensor changed from green to blue upon the addition of hydrogen peroxide in the presence of TMB. This change in the color intensity was linear with the concentration of H2O2. RGB software was used as a color analyzing model to evaluate the optical signals. This paper-based colorimetric platform provided us with an improved analytical figure of merit with a linear range of 0.005-100 μM with 0.003 μM limit of detection. The real sample analysis and excellent anti-interference potential results proved the good analytical performance of the proposed design, providing a more promising tool for colorimetric H2O2 detection. Introducing Cr2O3-TiO2 nanocomposite-based paper sensors, being a novel method for optical and colorimetric detection, can pave the way for the development of other sensing devices for the detection of different analytes.
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Affiliation(s)
- Sundas Jamil
- Department
of Chemistry, School of Science, University
of Management and Technology, Lahore 54000, Pakistan
- Interdisciplinary
Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad Lahore Campus, Lahore 54000, Pakistan
| | - Muhammad Nasir
- Interdisciplinary
Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad Lahore Campus, Lahore 54000, Pakistan
| | - Yaqeen Ali
- Computer
Science Department, COMSATS University Islamabad
Lahore Campus, Lahore 54000, Pakistan
| | - Sohail Nadeem
- Department
of Chemistry, School of Science, University
of Management and Technology, Lahore 54000, Pakistan
| | - Sidra Rashid
- Interdisciplinary
Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad Lahore Campus, Lahore 54000, Pakistan
| | - Muhammad Yaqoob Javed
- Department
of Electrical Engineering, COMSATS University
Islamabad Lahore Campus, Lahore 54000, Pakistan
| | - Akhtar Hayat
- Interdisciplinary
Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad Lahore Campus, Lahore 54000, Pakistan
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Zeng P, Zhang WD. Photocatalytic hydrogen evolution over a nickel complex anchoring to thiophene embedded g-C 3N 4. J Colloid Interface Sci 2021; 596:75-88. [PMID: 33838327 DOI: 10.1016/j.jcis.2021.03.080] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 03/12/2021] [Accepted: 03/13/2021] [Indexed: 11/18/2022]
Abstract
Evolution of hydrogen from water by utilizing solar energy and photocatalysts is one of the most promising ways to solve energy crisis. However, designing a cost-effective and stable photocatalyst without any noble metals is of vital importance for this process. Herein, an extremely active molecular complex cocatalyst NiL2(Cl)2 is successfully designed. After being covalently linked to thiophene-embedded polymeric carbon nitride (TPCN), the hybrid catalyst NiL2(Cl)2/TPCN exhibits extraordinary H2 production activity of 95.8 μmol h-1 without Pt (λ ≥ 420 nm), together with a remarkable apparent quantum yield of 6.68% at 450 nm. In such a composite catalyst, the embedded π-electron-rich thiophene-ring not only extends the π-conjugated system to enhance visible light absorption, but also promotes the charge separation through electron-withdrawing effect. It turns out that the CN covalent bonds formed between NiL2(Cl)2 and TPCN skeleton accelerate the transfer of electrons to the Ni active sites. Our finding reveals that the strategy of embedding π-electron-rich compounds to graphitic carbon nitride provides potentials to develop excellent photocatalysts. The strong covalent combination of molecular complexes cocatalyst onto organic semiconductors represents an important step towards designing noble-metal-free photocatalysts with superior activity and high stability for visible light driven hydrogen evolution.
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Affiliation(s)
- Peng Zeng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, PR China
| | - Wei-De Zhang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, PR China.
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Li L, Zhai L, Liu H, Li B, Li M, Wang B. A novel H2O2photoelectrochemical sensor based on ternary RGO/Ag-TiO2 nanotube arrays nanocomposite. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.137851] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Idris AO, Oseghe EO, Msagati TAM, Kuvarega AT, Feleni U, Mamba B. Graphitic Carbon Nitride: A Highly Electroactive Nanomaterial for Environmental and Clinical Sensing. SENSORS (BASEL, SWITZERLAND) 2020; 20:E5743. [PMID: 33050361 PMCID: PMC7600177 DOI: 10.3390/s20205743] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/21/2020] [Accepted: 09/23/2020] [Indexed: 12/19/2022]
Abstract
Graphitic carbon nitride (g-C3N4) is a two-dimensional conjugated polymer that has attracted the interest of researchers and industrial communities owing to its outstanding analytical merits such as low-cost synthesis, high stability, unique electronic properties, catalytic ability, high quantum yield, nontoxicity, metal-free, low bandgap energy, and electron-rich properties. Notably, graphitic carbon nitride (g-C3N4) is the most stable allotrope of carbon nitrides. It has been explored in various analytical fields due to its excellent biocompatibility properties, including ease of surface functionalization and hydrogen-bonding. Graphitic carbon nitride (g-C3N4) acts as a nanomediator and serves as an immobilization layer to detect various biomolecules. Numerous reports have been presented in the literature on applying graphitic carbon nitride (g-C3N4) for the construction of electrochemical sensors and biosensors. Different electrochemical techniques such as cyclic voltammetry, electrochemiluminescence, electrochemical impedance spectroscopy, square wave anodic stripping voltammetry, and amperometry techniques have been extensively used for the detection of biologic molecules and heavy metals, with high sensitivity and good selectivity. For this reason, the leading drive of this review is to stress the importance of employing graphitic carbon nitride (g-C3N4) for the fabrication of electrochemical sensors and biosensors.
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Affiliation(s)
- Azeez O. Idris
- Institute for Nanotechnology and Water Sustainability (iNanoWS), Florida Campus, College of Science, Engineering and Technology, University of South Africa, Johannesburg 1709, South Africa; (E.O.O.); (T.A.M.M.); (A.T.K.); (U.F.); (B.M.)
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Pseudo-SILAR assisted unique synthesis of ZnO/Ag2O nanocomposites for improved photocatalytic and antibacterial performance without cytotoxic effect. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125200] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Yu HY, Li HJ, Ma YY, Feng YX, Qian DJ. Interfacial self-assembly of carbon nitride-based nanocomposites with zinc terpyridyl coordination polymers for photocurrent generation and the photocatalytic degradation of organic dyes. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124702] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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11
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Ultra-Sensitive Hydrogen Peroxide Sensor Based on Peroxiredoxin and Fluorescence Resonance Energy Transfer. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10103508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this paper, a fluorescence resonance energy transfer (FRET)-based sensor for ultra-sensitive detection of H2O2 was developed by utilizing the unique enzymatic properties of peroxiredoxin (Prx) to H2O2. Cyan and yellow fluorescent protein (CFP and YFP) were fused to Prx and mutant thioredoxin (mTrx), respectively. In the presence of H2O2, Prx was oxidized into covalent homodimer through disulfide bonds, which were further reduced by mTrx to form a stable mixed disulfide bond intermediate between CFP-Prx and mTrx-YFP, inducing FRET. A linear quantification range of 10–320 nM was obtained according to the applied protein concentrations and the detection limit (LOD) was determined to be as low as 4 nM. By the assistance of glucose oxidase to transform glucose into H2O2, the CFP-Prx/mTrx-YFP system (CPmTY) was further exploited for the detection of glucose in real sample with good performance, suggesting this CPmTY protein sensor is highly practical.
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Dong H, Li W, Ou Y, Gao D, Yang Y, Zhang Y, Xiao P. Self-Assembly Hydrothermal Synthesis of Silverton-Type Polyoxometalate-Based Photocatalysts for Enhanced Degradation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:4454-4464. [PMID: 32281378 DOI: 10.1021/acs.langmuir.9b03721] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The synthesis of some complex polyoxometalates (POMs) is critical to develop potential photocatalysts with high catalytic activity and selectivity. Here, we address this challenge by a hydrothermal self-assembly route to obtain a novel POM-based Co4W6O21(OH)2·4H2O with a hierarchical microsphere structure. The Co4W6O21(OH)2·4H2O crystallizes in the cubic space group Im3̅ with cell parameters: a = b = c = 12.878 Å, α = β = γ = 90°, and Z = 4. The structure is further characterized by X-ray diffraction, X-ray photoelectron spectroscopy, UV-vis spectroscopy, thermogravimetric analysis, and Fourier transform infrared spectra. After depositing Ag2O nanoparticles on the 3D Co4W6O21(OH)2·4H2O microsphere by photochemical synthesis, the Co4W6O21(OH)2·4H2O/Ag2O heterojunction presents enhanced photocatalytic activity for RhB compared with P25 and pristine Ag2O. Moreover, we confirm the key role of holes for the Co4W6O21(OH)2·4H2O/Ag2O and put forward a possible mechanism for the photocatalytic degradation reaction.
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Affiliation(s)
- Hongmei Dong
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Wenhui Li
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Yingqing Ou
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Di Gao
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Yibin Yang
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing 400030, China
| | - Yunhuai Zhang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Peng Xiao
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing 400030, China
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