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Nazeer Z, Bibi I, Majid F, Kamal S, Alwadai N, Arshad MI, Ali A, Nouren S, Al Huwayz M, Iqbal M. Optical, Dielectric, Magnetic, Photocatalytic, and Antibacterial Properties of Ga-Doped BiGa xFe 1-xO 3 Synthesized by the Microemulsion Approach. ACS Omega 2024; 9:545-558. [PMID: 38222644 PMCID: PMC10785324 DOI: 10.1021/acsomega.3c06132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 11/08/2023] [Accepted: 11/09/2023] [Indexed: 01/16/2024]
Abstract
The effect of Ga-substitution on bismuth ferrite BiGaxFe1-xO3 (x = 0, 0.05, 0.10, 0.15, 0.20, and 0.25) properties was investigated, which was fabricated using a microemulsion route. X-ray diffraction analysis confirmed that specimens had a single-phase rhombohedral structure with space group R3̅c. The concentration of Ga had an impact on various properties such as structural parameters, crystalline size, porosity, and unit cell volume. The samples exhibited notable values for the dielectric constant, tangent loss, and dielectric loss in the low-frequency range, which declined as the frequency increased due to different polarizations. The increment in the AC conductivity was associated with rise in frequency. The P-E loops demonstrated that the samples became more resistive as the Ga concentration increased. The retentivity (Mr) and saturation magnetization (Ms) values reduced as the Ga content increased, although all samples had Hc values within the range for electromagnetic materials. The Ga-substitution had a synergistic effect on the electrochemical characteristics of BiGaxFe1-xO3, resulting in greater conductivity than that of undoped BiFeO3. These enhanced properties contributed to their higher photocatalytic activity in the degradation of crystal violet under visible light irradiation. The doped BiGaxFe1-xO3 exhibited 79% dye degradation after 90 min of illumination compared to 54% for pure BiFeO3. Recycling experiments confirmed the stability and reusability of the synthesized nanoparticles. The antibacterial activity of the samples was certified against various microbes, and the doped BiGaxFe1-xO3 showed promising activity. Thus, doped materials are good candidates for memories, dielectric resonators, and photovoltaics because of their high dielectric constant and AC conductivity, while their higher photocatalytic activity under visible light makes them promising photocatalysts for removing noxious and harmful effluents from wastewaters.
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Affiliation(s)
- Zarish Nazeer
- Institute
of Chemistry, The Islamia University of
Bahawalpur, Bahawalpur 63100, Pakistan
| | - Ismat Bibi
- Institute
of Chemistry, The Islamia University of
Bahawalpur, Bahawalpur 63100, Pakistan
| | - Farzana Majid
- Department
of Physics, University of the Punjab, Lahore 54590, Pakistan
| | - Shagufta Kamal
- Department
of Biochemistry, Government College University, Faisalabad 38040, Pakistan
| | - Norah Alwadai
- Department
of Physics, College of Sciences, Princess
Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Muhammad I. Arshad
- Department
of Physics, Government College University
Faisalabad, Faisalabad 38040, Pakistan
| | - Adnan Ali
- Department
of Physics, Government College University
Faisalabad, Faisalabad 38040, Pakistan
| | - Shazia Nouren
- Department
of Chemistry, Government College Women University, Sialkot 51300, Pakistan
| | - Maryam Al Huwayz
- Department
of Physics, College of Sciences, Princess
Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Munawar Iqbal
- Department
of Chemistry, Division of Science and Technology, University of Education, Lahore 54770, Pakistan
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Bashir M, Majid F, Bibi I, Jamil Z, Ali A, Al-Hoshani N, Mohamed RAEH, Iqbal M, Nazir A. Spectroscopic investigation of phase transformation of calcium oxalate dehydrates (renal calculi) using acidic Bryophyllum pinnatom powder. Spectrochim Acta A Mol Biomol Spectrosc 2023; 303:123192. [PMID: 37542869 DOI: 10.1016/j.saa.2023.123192] [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: 03/25/2023] [Revised: 07/14/2023] [Accepted: 07/22/2023] [Indexed: 08/07/2023]
Abstract
Urolithiasis is one of most common renal disorders, characterized by the formation of kidney stones (renal calculi) through the crystallization process within the urinary system. The frequently observed renal calculi are calcium oxalate renal calculi and treatment is done by shock wave method or lithotripsy which is harmful for other cells of the internal system. The objective of this work was to evaluate in vitro diagnosis of calcium oxalate kidney stones in the aqueous solution of Bryophyllum pinnatum. The B. pinnatum powder was mixed in apple cider vinegar and lemon juice separately to make solution 1 and 2 respectively. Apple cider vinegar and lemon juice were used as solvents due to their acidic and body compatible nature. Two surgically removed stones was dipped in solution 1 and 2. After two weeks, kidney stone of weight 2.7 g is completely dissolved in solution 2 while a considerable weight reduction of other kidney stone has been observed in solution 1. Fourier transform infrared (FTIR) spectroscopy results show the presence of two strong absorption peaks at 610 and 912 (cm-1) in both solutions after dissolution of urinary stones are related to calcium oxalate dehydrate (COD). Raman spectra further confirm the dissolution of COD in solution having Raman shifts at 504 and 910 (cm-1). Cluster formation and aggregation of particles has been observed in scanning electron microscopy images. This in vitro study proves that a mixture of Bryophyllum pinnatum powder and lemon juice is a best remedy to remove kidney stones.
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Affiliation(s)
- Mahwish Bashir
- Department of Physics, Govt. College Women University, Sialkot, Pakistan
| | - Farzana Majid
- Department of Physics, University of the Punjab, Lahore, Pakistan.
| | - Ismat Bibi
- Department of Chemistry, The Islamia University of Bahawalpur, Pakistan.
| | - Zunaira Jamil
- Department of Physics, Govt. College Women University, Sialkot, Pakistan
| | - Adnan Ali
- Department of Physics, Govt. College University, Faisalabad, Pakistan
| | - Nawal Al-Hoshani
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Rania Ali El Hadi Mohamed
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Munawar Iqbal
- Department of Chemistry, Division of Science and Technology, University of Education, Lahore, Pakistan
| | - Arif Nazir
- Deparment of Chemistry, The University of Lahore, Lahore, Pakistan.
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Nazeer Z, Bibi I, Majid F, Kamal S, Arshad MI, Ghafoor A, Alwadai N, Ali A, Nazir A, Iqbal M. Optical, Photocatalytic, Electrochemical, Magnetic, Dielectric, and Ferroelectric Properties of Cd- and Er-Doped BiFeO 3 Prepared via a Facile Microemulsion Route. ACS Omega 2023; 8:24980-24998. [PMID: 37483235 PMCID: PMC10357527 DOI: 10.1021/acsomega.3c01542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 06/19/2023] [Indexed: 07/25/2023]
Abstract
A series of Cd- and Er-doped bismuth ferrites were synthesized using a simple microemulsion technique. The influence of Cd and Er doping on the structural, ferroelectric, photocatalytic, and dielectric properties of bismuth ferrite (BFO) was examined in this research. The prepared materials were examined by X-ray diffraction, Raman, scanning electron microscopy, and UV-vis techniques. The XRD patterns reflected the formation of a monophasic rhombohedral structure with the space group R3-c and an average crystallite size calculated to be in the range of 29 to 32 nm. The saturation polarization (Ps), coercivity (Hc), and retentivity (Pr) of the materials were investigated by a hysteresis loop (P-E), and it was perceived that increasing the dopant contents improved the Ps and Pr values, which may be due to the variation of metal cation valence states. In accordance with the photoluminescence (PL) spectra, a highly substituted material displayed lower recombination and increased charge separation rate (e--h+), which eventually contributed to a higher photocatalytic degradation performance of the prepared NMs. Furthermore, as the frequency and dopant concentration increased, the dielectric loss decreased, which could be due to different types of polarization. Bi1 - xCdxFe1 - yEryO3 showed well-saturated hysteresis loops (P-E) with enhanced saturation polarization near 9.7 × 10-4 μC·cm-2. The remnant polarization of the BFO and BFOCE NPs was 2.26 × 10-4 and 8.11 × 10-4 μC·cm-2, respectively, under a maximum electric field, which may be due to the variation of the metal cation valence states. The improved ferroelectric and dielectric properties of Bi1 - xCdxFe1 - yEryO3 NPs are attributed to the reduced concentration of defects, the different domain behavior, and the valence state of Cd and Er ions. The electrochemical (crystal violet (CV) and I-V) properties of Bi1 - xCdxFe1 - yEryO3 were all influenced by the dopant concentrations (Cd and Er). The synergistic effects of Cd and Er on the substituted material enhanced the specific capacitance in comparison to undoped BiFeO3. The photocatalytic activity to degrade CV under visible irradiation increased in BFOCE as the dopant (x,y) concentration increased from 0 to 0.25 by showing 84% dye degradation in comparison to pristine BiFeO3 (53% only) within 120 min under visible light. Moreover, the stability of these prepared nanoparticles was confirmed using recycling experiments, with the results indicating that the synthesized nanomaterials demonstrated promising stability and reusability.
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Affiliation(s)
- Zarish Nazeer
- Institute
of Chemistry, The Islamia University of
Bahawalpur, Bahawalpur 63100, Pakistan
| | - Ismat Bibi
- Institute
of Chemistry, The Islamia University of
Bahawalpur, Bahawalpur 63100, Pakistan
| | - Farzana Majid
- Department
of Physics, University of the Punjab, Lahore 54590, Pakistan
| | - Shagufta Kamal
- Department
of Biochemistry, Government College University
Faisalabad, Faisalabad 38040, Pakistan
| | | | - Aamir Ghafoor
- Institute
of Chemistry, The Islamia University of
Bahawalpur, Bahawalpur 63100, Pakistan
| | - Norah Alwadai
- Department
of Physics, College of Sciences, Princess
Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Abid Ali
- Department
of Chemistry, The University of Lahore, Lahore 54000, Pakistan
| | - Arif Nazir
- Department
of Chemistry, The University of Lahore, Lahore 54000, Pakistan
| | - Munawar Iqbal
- Department
of Chemistry, Division of Science and Technology, University of Education, Lahore 53700, Pakistan
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Raza Q, Bibi I, Majid F, Kamal S, Ata S, Ghafoor A, Arshad MI, Al-Mijalli SH, Nazir A, Iqbal M. Solar light-based photocatalytic removal of CV and RhB dyes using Bi and Al doped SrFe12O19NPs and antibacterial properties. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.11.030] [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: 11/30/2022]
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Bashir M, Majid F, Bibi I, Mushtaq J, Ali A, Farhat LB, Katubi KM, Alwadai N, Khan M, Iqbal M. Ultrasonic assisted synthesis of ZnO nanoflakes and photocatalytic activity evaluation for the degradation of methyl orange. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104194] [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: 11/02/2022] Open
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Misbah, Bibi I, Majid F, Kamal S, Jilani K, Taj B, Nazeer Z, Iqbal M. Enhanced visible light-driven photocatalytic degradation of crystal violet dye using Cr doped BaFe12O19 prepared via facile micro-emulsion route. Journal of Saudi Chemical Society 2022. [DOI: 10.1016/j.jscs.2022.101533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Ghafoor A, Bibi I, Ata S, Majid F, Kamal S, Iqbal M, Iqbal S, Noureen S, Basha B, Alwadai N. Energy band gap tuning of LaNiO3 by Gd, Fe and Co ions doping to enhance solar light absorption for efficient photocatalytic degradation of RhB dye: A mechanistic approach. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117581] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Majid F, Dildar S, Ata S, Bibi I, Mohsin IU, Ali A, Almoneef MM, Iqbal M, Irshad S, Nazir A, Ali MD. Cobalt doping of nickel ferrites via sol gel approach: effect of doping on the structural and dielectric properties. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2021-3006] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Cobalt doped nickel ferrites were fabricated by sol gel route and the dielectric constant, tangent loss and AC conductivity were investigated as a function of Co doping. The X-ray diffractometer characterization confirmed that the Co
x
Ni1−x
Fe2O4 with doping concentration (x = 0.1, 0.2, 0.3, 0.4, and 0.5) have cubic spinel structure. In the XRD spectrum there appear extra peaks of Fe2O3 as an impurity that is gradually disappear by increasing doping ratio of cobalt ions, which is an indication of high crystallinity. The structural parameters (lattice constant, grain size, dislocation density, X-rays density and packing factor) are greatly influenced by the doping of cobalt atoms i.e., lattice constant increases. The crystal size increases from 30 to 42.26 nm by cobalt substitution in the pure nickel ferrites. The Fourier Transform IR Spectroscopy indicate shift in peaks to lower frequency region because cobalt doping reduced binding energy between metal ion and oxygen ions. Atomic structure of cobalt doped nickel ferrites examined by the Raman spectroscopy. Co
x
Ni1−x
Fe2O4 shows Raman mode at ∼285, ∼477, ∼563, ∼624 and ∼704 cm−1. There is unnoticeable Raman shift due to the doping of cobalt’s atoms.
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Affiliation(s)
- Farzana Majid
- Department of Physics , University of Punjab , Lahore , Pakistan
| | - Seemab Dildar
- Department of Physics , University of Punjab , Lahore , Pakistan
| | - Sadia Ata
- School of Chemistry , University of Punjab , Lahore , Pakistan
| | - Ismat Bibi
- Department of Chemistry , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
| | - Ijaz ul Mohsin
- Department of Chemistry , University of Engineering and Technology , Lahore , Pakistan
| | - Adnan Ali
- Department of Physics , Government College University , Faisalabad , Pakistan
| | - Maha M. Almoneef
- Department of Physics , College of Sciences, Princess Nourah Bint Abdulrahman University (PNU) , Riyadh , 11671 , Saudi Arabia
| | - Munawar Iqbal
- Department of Chemistry , The University of Lahore , Lahore , Pakistan
| | - Saba Irshad
- Institute of Biochemistry and Biotechnology, University of the Punjab , Lahore , Pakistan
| | - Arif Nazir
- Department of Chemistry , The University of Lahore , Lahore , Pakistan
| | - Muhammad D. Ali
- Department of Physics , University of Punjab , Lahore , Pakistan
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Ghafoor A, Bibi I, Ata S, Majid F, Kamal S, Rehman F, Iqbal S, Aamir M, Slimani Y, Iqbal M, Mailk A. Synthesis and characterization of magnetically separable La1−x
Bi
x
Cr1−y
Fe
y
O3 and photocatalytic activity evaluation under visible light. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2020-1747] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
A series of Bi and Fe doped La1−x
Bi
x
Cr1−y
Fe
y
O3 (x = 0.00–0.10 and y = 0.02–0.12) perovskites were fabricated through a facile microemulsion method and were characterized by XRD, DC electrical-resistivity, dielectric, VSM, and UV–Visible measurements. Orthorhombic phase of synthesized substituted chromite nanocrystallite was confirmed by powdered XRD analysis with crystallite size in 47.8–32.9 nm range. DC electrical resistivity was observed to increase from 1.70–39.99 × 108 Ω-cm. Dielectric parameters analyzed in frequency range of 20 kHz–20 MHz were decreased, while magnetic parameters were observed to increase with the increase in dopant (Bi+3 and Fe+3) concentration. Whereas coercivity values was low (narrow hysteresis loop), which indicate the soft ferromagnetic of the prepared material materials which are quite useful to employ in storage devices and electronics. Moreover, La1−x
Bi
x
Cr1−y
Fe
y
O3 degraded 90.80% Rhodamine B dye under visible light irradiation within 55 min. The increase in electrical resistivity, while decrease in dielectric parameters was also observed with increase in dopant concentration, ferromagnetic nature and excellent photocatalytic properties make this material suitable for high frequency energy devices, microwave appliances as well as an excellent magnetically separable photocatalyst for the purification of contaminated wastewater.
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Affiliation(s)
- Aamir Ghafoor
- Department of Chemistry , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
| | - Ismat Bibi
- Department of Chemistry , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
| | - Sadia Ata
- Institute of Chemistry , University of the Punjab , Lahore , Pakistan
| | - Farzana Majid
- Department of Physics , University of the Punjab , Lahore , Pakistan
| | - Shagufta Kamal
- Department of Applied Chemistry & Biochemistry , GC University , Faisalabad , Pakistan
| | - Fariha Rehman
- Department of Economics , COMSATS University Islamabad, Lahore Campus , Lahore , Pakistan
| | - Shahid Iqbal
- Department of Chemistry , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
| | - Muhammad Aamir
- Department of Chemistry , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
| | - Yassine Slimani
- Department of Biophysics, Institute for Research and Medical Consultations (IRMC) , Imam Abdulrahman Bin Faisal University , P.O. Box 1982 , Dammam 31441 , Saudi Arabia
| | - Munawar Iqbal
- Department of Chemistry , The University of Lahore , Lahore , Pakistan
| | - Abdul Mailk
- National Institute of Lasers and Optronics (NILOP) , Islamabad , Pakistan
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Ata S, Shaheen I, Majid F, Bibi I, Ijaz-ul-Mohsin, Jilani K, Slimani Y, Iqbal M. Hydrothermal route for the synthesis of manganese ferrite nanoparticles and photocatalytic activity evaluation for the degradation of methylene blue dye. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-19-1381] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Manganese ferrite (MnFe2O4) was prepared via hydrothermal route and characterized by advanced techniques. The photocatalytic activity (PCA) was evaluated by degrading methylene blue (MB) dye under UV irradiation. The effect of process variables such as catalyst dose, UV exposure time and pH was studied for maximum degradation of dye at optimum conditions. The MnFe2O4 showed face centered cubic structure and average particle size of 23.98 nm. The lattice constant, lattice strain, ionic radii (rA & rB), bonding angles and hoping lengths of MnFe2O4 were recorded to be 0.8467 nm, 0.08, 1.66, 0.766, 1.833 and 2.116 Å, respectively. The MnFe2O4 showed promising PCA and at optimum conditions of process variable, up to 99% MB dye degradation was achieved. The PCA was found dependent to catalyst dose, UV exposure time and pH. Results revealed that the hydrothermal rout is feasible route for the preparation of MnFe2O4 ferrite in nano size and the PCA revealed the potential application of MnFe2O4 ferrite to degrade dye in textile wastewater.
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Affiliation(s)
- Sadia Ata
- Institute of Chemistry, University of the Punjab , Lahore , Pakistan
| | - Ifra Shaheen
- Institute of Chemistry, University of the Punjab , Lahore , Pakistan
| | - Farzana Majid
- Deparment of Physics , University of the Punjab , Lahore , Pakistan
| | - Ismat Bibi
- Department of Chemistry , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
| | - Ijaz-ul-Mohsin
- Department of Chemistry , University of Engineering and Technology , Lahore , Pakistan
| | - Kashif Jilani
- Department of Biochemistry , University of Agriculture Faisalabad , Faisalabad , Pakistan
| | - Yassine Slimani
- Department of Biophysics , Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University , P.O. Box 1982 , 31441 , Dammam , Saudi Arabia
| | - Munawar Iqbal
- Department of Chemistry , University of Lahore , Lahore , Pakistan
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Majid F, Shahin A, Ata S, Bibi I, Malik A, Ali A, Laref A, Iqbal M, Nazir A. The effect of temperature on the structural, dielectric and magnetic properties of cobalt ferrites synthesized via hydrothermal method. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2020-1751] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
A series of cobalt ferrite nanoparticles were prepared using hydrothermal process by varying the reaction temperature. The structural, magnetic and dielectric properties have been studied with the help of X-ray diffractometer (XRD), vibrating sample magnetometer (VSM) and impedance analyzer respectively. XRD spectra of all samples confirmed the formation of cobalt ferrite (CoFe2O4) nanoparticles (NPs). The lattice constant ‘a’ for temperature series samples is averaged around 8.4023 Å. Crystallite size of temperature series is calculated by Debye–Scherer formula that lies in the range of 15.04–20.49 nm. Its values increase because the chance of coalescence increases by increasing temperature. The maximum packing factor is obtained for the sample with highest reaction temperature. From VSM data, we get the M–H hysteresis curves for complete temperature series which confirms the magnetic nature. The maximum saturation magnetization 150.67 emu/g is obtained for the sample prepared at highest temperature. Different magnetic parameter such as saturation magnetization, coercivity, retentivity, squareness ratio, anisotropy constant and magneton number has been calculated from VSM data. AC response of all prepared ferrites was studied with impedance analyzer of frequency range 20 Hz to 20 MHz. Ferrites are the insulating materials, so, eddy current does not induce in transformer cores made of ferrite materials. In the medical field cobalt ferrite is used for drug delivery, as a biosensor and in MRI.
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Affiliation(s)
- Farzana Majid
- Department of Physics , University of the Punjab , Lahore , Pakistan
| | - Ammarah Shahin
- Department of Physics , University of the Punjab , Lahore , Pakistan
| | - Sadia Ata
- Department of Chemistry , University of the Punjab , Lahore , Pakistan
| | - Ismat Bibi
- Department of Chemistry , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
| | - Abdul Malik
- National Institute for Laser and Optronics (NILOP) , Islamabad , Pakistan
| | - Adnan Ali
- Department of Physics , Government College University Faisalabad , Lahore , Pakistan
| | - Amel Laref
- Department of Physics and Astronomy , College of Science, King Saud University , Riyadh 11451 , Saudi Arabia
| | - Munawar Iqbal
- Department of Chemistry , The University of Lahore , Lahore , Pakistan
| | - Arif Nazir
- Department of Chemistry , The University of Lahore , Lahore , Pakistan
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Aamir M, Bibi I, Ata S, Majid F, Kamal S, Alwadai N, Sultan M, Iqbal S, Aadil M, Iqbal M. Graphene oxide nanocomposite with Co and Fe doped LaCrO3 perovskite active under solar light irradiation for the enhanced degradation of crystal violet dye. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114895] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Abbas S, Bibi I, Majid F, Ata S, Ibrahim SM, Kamal S, Sultan M, Jilani K, Iqbal S, Iqbal M. Micro-emulsion synthesis of La1 − xCrxFeO3 nanoparticles: effect of Cr doping on ferroelectric, dielectric and photocatalytic properties. International Journal of Chemical Reactor Engineering 2020. [DOI: 10.1515/ijcre-2019-0201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractIn the present study, La1 − xCrxFeO3 (x = 0.0, 0.3, 0.6, 0.9, 1.0) was synthesized by micro-emulsion route and characterized by X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR), Scanning electron microscope (SEM), Energy-dispersive X-ray (EDX) techniques. The dielectric, ferroelectric and photocatalytic properties were investigated and compared with un-doped material. The XRD analysis revealed orthorhombic geometry of La1 − xCrxFeO3 (x = 0.0, 0.3, 0.6, 0.9, 1.0), Cr was doped successfully into the lattice structure of LaFeO3 and particles were spherical and in agglomerated form. The grain sizes were recorded to be 15, 16.9, 17.1, 17.65 and 18.3 (nm) for La1 − xCrxFeO3 (x = 0.0, 0.3, 0.6, 0.9, 1.0), respectively. EDX analysis confirmed the purity of LaCrFeO3 samples. The lattice parameters, bulk density, X-ray density, crystalline size and porosity were determined were also determined of all the La1 − xCrxFeO3 samples. The dielectric constant and dielectric loss values decreased at higher frequency and Cr concentration affected the dielectric properties. The photocatalytic activity (PCA) was evaluated by degrading Congo Red (CR) dye under solar light irradiation and up to 85.43% dye degradation was achieved within 45 min of irradiation. Phyto-toxicity analysis before and after dye degradation was performed, which revealed the toxicity reduction in response of dye degradation. Results revealed that lanthanum ferrite (perovskite) doping with Cr could possibly be employed to enhance the ferroelectric, dielectric and photocatalytic properties.
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Affiliation(s)
- Sehrish Abbas
- Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Ismat Bibi
- Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Farzana Majid
- Department of Physics, University of the Punjab, Lahore, Pakistan
| | - Sadia Ata
- Institute of Chemistry, University of the Punjab, Lahore, Pakistan
| | - Sobhy M. Ibrahim
- Department of Biochemistry, College of Science, King Saud University, P.O. Box: 2455, Riyadh11451, Saudi Arabia
| | - Shagufta Kamal
- Department of Applied Chemistry and Biochemistry, Government College University, Faisalabad, Pakistan
| | - Misbah Sultan
- Institute of Chemistry, University of the Punjab, Lahore, Pakistan
| | - Kashif Jilani
- Deprtment of Biochemistry, University of Agriculture, Faisalabad, Pakistan
| | - Shahid Iqbal
- Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Munawar Iqbal
- Department of Chemistry, The University of Lahore, Lahore, Pakistan
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Majid F, Nazir A, Ata S, Bibi I, Mehmood HS, Malik A, Ali A, Iqbal M. Effect of Hydrothermal Reaction Time on Electrical, Structural and Magnetic Properties of Cobalt Ferrite. ACTA ACUST UNITED AC 2019. [DOI: 10.1515/zpch-2019-1423] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Abstract
Cobalt ferrite was synthesized by hydrothermal route in order to investigate the effect of hydrothermal reaction time on structural, magnetic and dielectric properties. The synthesized cobalt ferrite was characterized by X-ray diffraction, Fourier transform infrared and Vibrating-Sample Magnetometer (VMS). XRD data analysis confirmed the formation of cubic inverse spinel ferrite for complete time series as the high intensity peak corresponds to cubic normal spinel structure. The ionic radii, cation distribution among tetrahedral and octahedral sites, lattice parameters, X-ray density, bond lengths were also investigated cobalt ferrite prepared at different hydrothermal reaction time. The crystallite size was found to be in the range of 11.79–32.78 nm. Tolerance factor was near unity that also confirms the formation of cubic ferrites. VSM studies revealed the magnetic nature of cobalt ferrite. The coercivity (1076.3Oe) was observed for a sample treated for 11 h. The squareness ratio was 0.56 that is close to 0.5 which shows uniaxial anisotropy in cobalt ferrite. Frequency dependent dielectric properties i.e. dielectric constant, AC conductivity, tangent loss and AC resistivity are calculated with the help of Impedance Analyzer. Intrinsic cation vibration of cubic spinel ferrites are confirmed from FTIR analysis in the range of 400–4000 cm−1. In view of enhanced properties, this technique could possibly be used for the synthesis of cobalt ferrite for different applications.
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Affiliation(s)
- Farzana Majid
- Department of Physics , University of the Punjab , Lahore , Pakistan
| | - Amarah Nazir
- Department of Physics , University of the Punjab , Lahore , Pakistan
| | - Sadia Ata
- Department of Chemistry , University of Punjab , Lahore , Pakistan
| | - Ismat Bibi
- Department of Chemistry , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
| | - Hafiz Shahid Mehmood
- Department of Electrical Engineering , The University of Lahore , Lahore , Pakistan
| | - Abdul Malik
- National Institute of Laser and Optronics (NILOP) , Islamabad , Pakistan
| | - Adnan Ali
- Department of Physics , Government College University Faisalabad , Lahore , Pakistan
| | - Munawar Iqbal
- Department of Chemistry , The University of Lahore , Lahore , Pakistan
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Majid F, Rauf J, Ata S, Bibi I, Yameen M, Iqbal M. Hydrothermal Synthesis of Zinc Doped Nickel Ferrites: Evaluation of Structural, Magnetic and Dielectric Properties. ACTA ACUST UNITED AC 2019. [DOI: 10.1515/zpch-2018-1305] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Abstract
Nickel–zinc ferrites are soft magnetic materials that have different technological applications due to their low magnetic coercivity, high electrical resistivity and low eddy current loss. The soft ferrites are the best for manufacturing core of power transformers, recording heads, data storage devices, telecommunication equipment, media devices, microwaves and electronic devices. In current investigation, a series of zinc doped nickel ferrites (ZnxNi1−xFe2O4, x = 0.1, 0.2, 0.3, 0.4 and 0.5) were prepared by hydrothermal method (at 220 °C, 16 h). The structural, magnetic and dielectric properties were measured. X-ray diffractometer and fourier transform infrared spectroscopy (FTIR) were used to analyze the structural properties and structure of zinc doped nickel ferrites was spinel. As the concentration of Zn was increased, the structural properties (lattice constant, density, dislocation density, radii of tetra and octahedral sites and oxygen positional parameters) were also changed. FTIR results showed the strongest absorption band at 500–600 cm−1, which indicate the intrinsic stretching vibration of Zn+2 ↔ O bond (Mtetra ↔ O) at tetrahedral site. Vibrating sample magnetometer (VSM) was used to measure magnetic properties and it was observed that the value of saturation magnetization increased with Zn concentration. The investigation of frequency dependent dielectric property was measured by Impedance Analyzer. Dielectric constant and tangent loss decreased at higher frequency, whereas AC conductivity increased with frequency.
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Affiliation(s)
- Farzana Majid
- Department of Physics , University of the Punjab , Quaid-i-Azam Campus , Lahore , Pakistan
| | - Javeria Rauf
- Department of Physics , University of the Punjab , Quaid-i-Azam Campus , Lahore , Pakistan
| | - Sadia Ata
- Department of Chemistry , University of the Punjab , Quaid-i-Azam Campus , Lahore , Pakistan
| | - Ismat Bibi
- Department of Chemistry , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
| | - Muhammad Yameen
- Department of Biochemistry , Government College University , Faisalabad , Pakistan
| | - Munawar Iqbal
- Department of Chemistry , University of Lahore , Lahore , Pakistan
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Ata S, Tabassum A, Bibi I, Majid F, Sultan M, Ghafoor S, Bhatti MA, Qureshi N, Iqbal M. Lead Remediation Using Smart Materials. A Review. ACTA ACUST UNITED AC 2019. [DOI: 10.1515/zpch-2018-1205] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Abstract
The nanoparticles have been prepared and employed as excellent adsorbents for the sequestration of heavy metal ions and hazardous impurities from the aqueous media. The surface morphological, textural and structural properties of nanoparticles have been modified, which are capable and potentially useful for the remediation of metal ions. Several metals (oxides, doped, nanocomposites of Fe, Ti, Zn, SiO2, SiC, Mo, Co, Ni, Zr, Mn, Si, S, Al, Cu, Ce, graphene, CNTs) were reported an efficient adsorbents for the removal of lead (Pb) ions from aqueous media and polluted water. The present review focuses on different kinds of nanoparticles such as metal oxides, carbon based and host supported employed for removal of Pb ions under varying experimental conditions such as pH, temperature, contact time and concentrations. The preparation strategies, physicochemical properties and adsorption are also discussed. Based on studies, it was found that the smart materials are affective adsorbents for the purification of wastewater containing Pb ions and could possibly extended for the remediation of other heavy metal ions.
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Affiliation(s)
- Sadia Ata
- Institute of Chemistry , University of the Punjab , Lahore , Pakistan
| | - Anila Tabassum
- Institute of Chemistry , University of the Punjab , Lahore , Pakistan
| | - Ismat Bibi
- Department of Chemistry , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
| | - Farzana Majid
- Department of Physics , University of the Punjab , Lahore , Pakistan
| | - Misbah Sultan
- Institute of Chemistry , University of the Punjab , Lahore , Pakistan
| | - Samina Ghafoor
- Institute of Chemistry , University of the Punjab , Lahore , Pakistan
| | - Muhammad Arif Bhatti
- Mineral Processing Research Centre , PCSIR Laboratories Complex , Ferozepur Road, Lahore , Pakistan
| | - Naseem Qureshi
- Department of Chemistry , Karakoram International University , Gilgit-Baltistan , Pakistan
| | - Munawar Iqbal
- Department of Chemistry , University of Lahore , Lahore , Pakistan
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Majid F, Malik A, Ata S, Hussain Z, Bibi I, Iqbal M, Rafay M, Rizvi H. Structural and Optical Properties of Multilayer Heterostructure of CdTe/CdSe Thin Films. Z PHYS CHEM 2018. [DOI: 10.1515/zpch-2018-1339] [Citation(s) in RCA: 11] [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: 11/15/2022]
Abstract
Abstract
CdTe/CdSe multilayer heterostructures thin films were prepared by thermal evaporation method. The CdTe/CdSe layers deposited on glass substrate and effects of annealing temperature on optical and structural properties of thin films were investigated. The XRD analysis revealed that CdTe and CdSe were in cubic (111) and hexagonal (100) forms. By increasing the annealing temperature, intensity of XRD peaks increased for multilayer heterostructures. Band alignment in heterostructures of CdTe/CdSe was of type II. Energy band gaps values for CdTe/CdSe multilayer heterostructures increased with respect to bulk compounds. During emission, red and blue shifts are observed in visible region in photoluminescence spectrum of CdTe/CdSe samples. Due to better crystallinity of multilayer thin film, 1LO, 2LO and 3LO phonon modes were observed in Raman spectrum.
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Affiliation(s)
- Farzana Majid
- Department of Physics , University of the Punjab , Lahore , Pakistan
| | - Abdul Malik
- National Institute for Laser and Optronics (NILOP) , Islamabad , Pakistan
| | - Sadia Ata
- Institute of Chemistry, University of the Punjab , Lahore , Pakistan
| | - Zaheer Hussain
- Department of Physics , University of the Punjab , Lahore , Pakistan
| | - Ismat Bibi
- Department of Chemistry , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
| | - Munawar Iqbal
- Department of Chemistry , University of Lahore , Lahore , Pakistan
| | - Muhammad Rafay
- Department of Forestry, Range and Wildlife Management , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
| | - Hina Rizvi
- Department of Environmental Sciences and Engineering , Government College University , Faisalabad , Pakistan
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Abstract
This paper describes an outbreak of gastrointestinal illness affecting at least 110 people, of whom 41 had microbiological confirmation of Campylobacter jejuni infection. The outbreak of infection was found to have been associated with consumption of inadequately pasteurised milk from a local dairy. The problem of enforcement of food and safety regulations when milk from dairies fails the phosphatase test is discussed. The prevalence of seroconversion to campylobacter in the community is estimated from a sample of cases and controls involved in this outbreak.
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Affiliation(s)
- T Fahey
- Department of Public Health Medicine, Oxfordshire Health Authority, Oxford, U.K
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Salimullah M, Ferdousi T, Majid F. Stimulated Brillouin scattering of electromagnetic waves in magnetized semiconductor plasmas. Phys Rev B Condens Matter 1994; 50:14104-14111. [PMID: 9975627 DOI: 10.1103/physrevb.50.14104] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Synnott M, Morse DL, Maguire H, Majid F, Plummer M, Leicester M, Threlfall EJ, Cowden J. An outbreak of Salmonella mikawasima associated with doner kebabs. Epidemiol Infect 1993; 111:473-81. [PMID: 8270007 PMCID: PMC2271257 DOI: 10.1017/s0950268800057204] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [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: 01/29/2023] Open
Abstract
During October 1992 an increase in the number of isolates of Salmonella mikawasima, a rare serotype, was noted including a cluster of nine cases in the South West Thames region. A case control study was conducted and univariate analysis showed a statistical association between illness and eating at take-away A for cases compared with household controls (P = 0.003) and with neighbourhood controls (P = 0.0245). Cases were also more likely to have eaten kebabs than were controls or average take-away A customers, implicating doner kebabs as the most likely vehicle of infection. Plasmid profile analysis of the nine cases' isolates showed them to be indistinguishable and to be characterized by a single plasmid of approximately 60 MDa. The original source of the Salmonella mikawasima contamination was not determined, but food preparation practices for kebabs at take-away A were insufficient to protect against illness if contaminated. This outbreak was only recognized because of the unusual serotype, but could be an indication of a more widespread problem with doner kebabs.
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Affiliation(s)
- M Synnott
- PHLS Communicable Disease Surveillance Centre, London
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Noone A, Durante AJ, Brady AR, Majid F, Swan AV, Parry JV, Hart GJ, Connell JA, Perry KR, Joce RE. HIV infection in injecting drug users attending centres in England and Wales, 1990-1991. AIDS 1993; 7:1501-7. [PMID: 8280418 DOI: 10.1097/00002030-199311000-00015] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [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: 01/29/2023]
Abstract
OBJECTIVE To monitor trends in HIV infection and associated risk behaviours in injecting drug users (IDU) in England and Wales. DESIGN Ongoing voluntary unlinked anonymous cross-sectional survey. METHOD IDU attending centres in 1990 and 1991 were invited to complete a brief questionnaire requesting demographic and behavioural information, and to provide a saliva sample to be tested for antibodies to HIV and to the core antigen of hepatitis B virus (HBV). RESULTS In 1990, 1.2% (19 out of 1543) of samples from 33 centres, and in 1991 1.8% (25 out of 1417) of samples from 37 centres contained antibody to HIV. Antibody t9 HBV core-antigen was found in 33 and 31% of IDU in 1990 and 1991, respectively. The prevalence of HIV infection in IDU attending centres in London (4.2%) was higher than in those attending centres elsewhere (0.8%). The prevalence of HIV infection in 1991 varied between individual centres from 0 to 10.6%, and at many centres outside London no IDU were infected with HIV. In the same year the prevalence of past infection with HBV varied from 14 to 54%, and IDU who had evidence of HBV infection were found among attenders in nearly all centres. The prevalences of sharing injecting equipment and risky sexual behaviour were high at many centres. The prevalence of HIV infection was higher in IDU who had started to inject in 1985 or earlier, than in those who started injecting later. In each year, approximately half the IDU surveyed reported having had a voluntary confidential HIV-antibody test, and the prevalence of HIV infection was five times higher in those tested than in those who had not been tested. CONCLUSIONS HIV prevalence in IDU attending centres in England and Wales was low in 1990-1991. There is some indication that IDU have modified their injecting or sexual behaviour, but even at existing reduced levels of risk behaviour, transmission can occur in HIV is introduced into previously unexposed groups.
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Affiliation(s)
- A Noone
- Public Health Laboratory Service AIDS Centre, Communicable Disease Surveillance Centre, London, UK
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Morgan D, Newman CP, Hutchinson DN, Walker AM, Rowe B, Majid F. Verotoxin producing Escherichia coli O 157 infections associated with the consumption of yoghurt. Epidemiol Infect 1993; 111:181-7. [PMID: 8405146 PMCID: PMC2271388 DOI: 10.1017/s0950268800056880] [Citation(s) in RCA: 213] [Impact Index Per Article: 6.9] [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: 01/30/2023] Open
Abstract
Sixteen cases of verotoxin producing Escherichia coli (VTEC) O 157:H7 Phage Type 49 infection were identified in the North West of England from 1 September to 1 November 1991, eight of whom lived in or around the same large town. Eleven of the cases were aged 10 years or less, and five of the affected children developed haemolytic uraemic syndrome. A case control study demonstrated a strong association between VTEC O 157:H7 PT 49 infection and the consumption of a locally produced live yoghurt. This is the first time that an outbreak of VTEC O 157 infection has been linked to the consumption of yoghurt and this vehicle of infection should be considered when investigating such outbreaks in future.
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Affiliation(s)
- D Morgan
- Public Health Laboratory Service, Communicable Disease Surveillance Centre, London
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Abstract
The incidence of severe injuries for soccer players may lead to long-term inactivity or, at worst, retirement from the game. Many of these injuries, particularly those involving the lower leg, can be attributed to adverse physical conditions at the interface between the soccer shoe and the playing support surface. This study investigated the biomechanical characteristics at this interface for a range of proprietary soccer shoes. An experimental system was designed and developed which, via a weighted pendulum arm making contact with a vertical column, provided controlled rotation of the forefoot of the soccer shoe on samples of playing surfaces. The overall rotation was found to depend on several physical and material factors. For example, the size 7 soccer shoes produced a statistically significant increase in axial rotation for the same impact energy compared to the larger sized shoes under test. In addition, flat soled shoes, designed for synthetic playing surfaces, produced consistently smaller rotations than shoes with either moulded or screw-in studs, although this finding depended on the moisture content of the playing surface. The pressure distribution within several soccer shoes was also measured using the F-Scan Gait Analysis System, for a subject walking across a grass surface. Results indicated differences in pressure distribution over the first metatarsal area of the foot, in existing shoe designs.
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Affiliation(s)
- F Majid
- Department of Materials, Queen Mary and Westfield College, University of London
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Majid F. Death and epidemiology in Bangladesh. Br Med J (Clin Res Ed) 1983; 287:663-6. [PMID: 6411273 PMCID: PMC1548824 DOI: 10.1136/bmj.287.6393.663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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