Facile fabrication of ternary CuO/CuS/ZnS for photodegradation of methylene blue

Abudllah Muhammad,Al Huwayz Maryam,Alwadai Norah,Manzoor Sumaira,Nisa Mehar Un,John Peter,Ghori Muhammad Ishfaq,Aman Salma,Al-Buriahi M. S.,Ashiq Muhammad Naeem 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.3

Synthetic dyes play a vital role in our daily life because they are utilized in products ranging from clothing to leather acces- sories. Unfortunately, these carcinogenic dyes are discharged into water streams any prior process considering the health problems in aquatic life and human beings. It is mandatory to separate noxious materials from wastewater. Semiconductors are viewed as a viable possibility for photocatalytic mineralization of noxious dyes. Herein, facile in situ hydrothermal approach (HT) was utilized for the fabrication of CuO, CuS ZnS, and their ternary CuO/CuS/ZnS nanocomposite. The fab- ricated CuO/CuS/ZnS nanocomposites were analysed through powder X-ray diff raction (PXRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope equipped with energy-dispersive X-ray (SEM–EDX), and ultraviolet– visible spectroscopy (UV–Vis). Moreover, the optical investigation manifested the bandgap energy value of copper oxide, copper sulphides, zinc sulphides, and ternary CuO/CuS/ZnS nanocomposite, corresponding to 2.63, 3.1, 4.51, and 2.2 eV, respectively, which was estimated from absorption spectrum. Subsequently, the photocatalytic results of CuO, CuS, ZnS, and ternary CuO/CuS/ZnS nanocomposite against methylene blue (MB) dye were 71%, 42%, 45%, and 96%, respectively. The photocatalytic scheme showed the role of hydroxyl radicals and electrons in the photodegradation reaction. Our fi nding suggests that the fabricated nanocomposite shows superior photocatalytic efficiency towards mineralization of methylene blue which can be used for commercial applications.

Biocompatibility of cobalt iron oxide magnetic nanoparticles in male rabbits

Furhan Iqbal,Tanveer Ahmad Tabish,Muhammad Naeem Ashiq,Muhammad Azeem Ullah,Shahid Iqbal,Muhammad Latif,Muhammad Ali,Muhammad Fahad Ehsan 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.7

Present study was conducted to study the in vivo biocompatibility of cobalt iron oxide magnetic nano-particles (CoFe2O4 MNPs) in rabbits. CoFe2O4 MNPs were synthesized by the conventional micro emulsion technique in crystallite size range of 30 to 50 nm. The lattice constant (a) and cell volume were found to be 8.386 Å and 589.75 Å3, respectively, revealed by XRD. Subject animals were divided in three groups--low dose, high dose and control group without nanoparticles implantation for biocompatibility evaluation. CoFe2O4 was intraperitoneally implanted in rabbits: low dose (1mg CoFe2O4/Kg body weight) and high dose (10mg CoFe2O4/Kg body weight). Blood, serum and histological study of vital organs (liver, heart, kidney and spleen) were carried out in seven days of time protocol after sacrificing of animals. Results indicated that CoFe2O4 had drastically affected the blood chemistry in a dose-dependent manner as RDWa (P=0.01), Platelet (P<0.001) and Plateletcrit (P<0.001) concentrations reduced significantly in low dose and high dose CoFe2O4 treatments as compared to sham treated control group. Histological analysis revealed that CoFe2O4 exposure resulted in disordered and abnormal histology of liver, kidney and that of muscles at surgical site. It is concluded that CoFe2O4 has low biocompatibility and higher toxicity levels in living system at the applied doses.

A Study of the Thermal Properties of Nano-crystalline Binary Oxides Prepared by Co-precipitation Method

Tahira Amer Bashir Ziya,Muhammad Naeem Ashiq,고재현,Farooq Bashir,Ghulam Shabbir 한국물리학회 2020 새물리 Vol.70 No.2

The Thermal properties of nano-crystalline CeO2, FeO, MgO, Ho2O3, NiO and Y2O3, prepared by using the co-precipitation method, have been investigated using X-ray diffraction (XRD) at room temperature. The integrated intensity data obtained from the X-ray diffraction experiments was utilized to determine the temperature factor (B(T)), mean square amplitude of vibration (u2(T)), Debye temperature (D), melting point (Tm) and activation energy for vacancy formation (Ef ). The values of (B(T)) and (u2(T)) in the present case were found to be large while the values of D and Ef were found to be lower than the corresponding values reported for the binary oxides with large particle sizes. This suggests that a decrease in particle size from micro to nano-scale may induce weakening of the bonds. On a nano-scale as compared to ordinary size, the values of the melting points were found be higher for the heavier atomic oxides.

Facile synthesis of strontium selenide supported copper sulfide hybrid nanosheets as an efficient electrode for high-performance OER

Junaid Ali,Abdullah Muhammad,Bano Nigarish,Noreen Faiqa,Shah Syed Imran Abbas,Alshgari Razan A.,Mohammad Saikh,Manzoor Sumaira,Ehsan Muhammad Fahad,Ashiq Muhammad Naeem 한국세라믹학회 2024 한국세라믹학회지 Vol.61 No.3

To drive clean and sustainable fuel production via water electrolysis, development of high-performing, cost-eff ective elec- trocatalysts rich in earth elements without relying on precious metals or costly materials is crucial. In this study, strontium selenide (SrSe), copper sulfi de (CuS), and composite SrSe@CuS via a traditional coprecipitate method under alkaline con- ditions are synthesized. Characterization techniques including X-ray diff raction, Transmission electron microscopy, Field emission scanning electron microscopy, and Brunauer–Emmett–Teller surface area analysis are employed to analyze the structure, morphology, and surface characteristics. The larger surface area of 123  m 2  g−1 and lower crystalline size (46.43 nm) of SrSe@CuS nanosheets show more active sites for oxygen evolution reaction. The oxygen evolution activity displayed overpotentials of 290 mV, a lower tafel slope of 67 mV  dec −1, and Lower charge transfer resistance (RCT) values of SrSe@ CuS nanosheets (1.82 Ω) surpassing the individual SrSe and CuS nanosheets. Notably, the SrSe@CuS nanosheets exhibited remarkable stability, maintaining an oxygen evolution reaction (OER) activity of 10 mA  cm −2 for over 50 h and sustaining a negligible loss in performance even after 50,000 cycles of repetitive cyclivoltammetry scans. These fi ndings highlight their potential applicability in energy conversion and storage systems.

CeSe nanocube anchored on the nanosheet of reduced graphene oxide (rGO) as a binder free electrode for energy conversion system

Hayat Majid,Ali Bakhat,Yunis Muhammad,Al-Sehemi Abdullah G.,Messali Mouslim,Manzoor Sumaira,Abdullah Muhammad,Alanazi Meznah M.,Abdelmohsen Shaimaa A. M.,Ashiq Muhammad Naeem 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.4

There is a persistent imbalance between energy demand and supply since renewable energy sources are intermittent. A potential answer to this ongoing problem is the development of suitable materials that could be utilized in storage energy devices. Among all the devices, supercapacitors with effficient electrode material are one of the possible storage technologies. Here in the present work, a cerium selenide/reduced graphene oxide (CeSe/rGO) heterostructure-based electrode is fabricated via hydrothermal technique. The synthesized CeSe/rGO performs well with 810.45 F g −1 specific capacitance at 1.5 A g −1, and an exceptional rate of capability with negligible instability up to 5000th cycles. Additionally, the probable contribution of rGO to the composite's ability to increase supercapacitance through synergy effect of CeSe and rGO has been observed. EIS (Electrochemical impedance spectroscopy) was exploited to fi nd out the mechanism of charge transmission for the fabricated material. The electrochemical analysis indicates that CeSe/rGO exhibited the superior performance than the apparently cutting-edge structures.

Scalable synthesis of MOFs-derived ZnO/C nanohybrid: efficient electrocatalyst for oxygen evolution reaction in alkaline medium

Munawar Tauseef,Bashir Ambreen,Mukhtar Faisal,Nadeem Muhammad Shahid,Manzoor Sumaira,Ashiq Muhammad Naeem,Khan Shoukat Alim,Koc Muammer,Iqbal Faisal 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.6

One of the main goals of energy conversion research is to develop effi cient, nonprecious, and stable electrocatalysts to replace defi cient and unstable noble metal catalysts. Hence, this work described metal–organic frameworks (MOFs) derived ZnO/C hybrid via a hydrothermal route grown on the surface of conducting stainless steel substrate (SS). By using multiple physical techniques (XRD, FTIR, TEM, XPS, and EDX), we compared structural and morphological properties of ZnO/C hybrid and MOF-5 electrodes. The electrocatalytic behaviour of amiable and economical ZnO/C/SS catalyst was noticed in catalyzing oxygen evolution reaction (OER) in one mole KOH electrolyzer with low overpotential and excellent stability. Cyclic sweep voltammetry indicated that the ZnO/C/SS hybrid only needs an ultralow overpotential of 282 mV to achieve a current density of 10 mA  cm −1 for OER. In addition, ZnO/C/SS with a low Tafel slope of 39.3 mV/dec and higher 0.29  s −1 turnover frequency can serve as a profi cient electrocatalyst compared to commercial ZnO and MOF-5 electrodes. The stability of ZnO/C/SS hybrid electrocatalyst approaching minor chronoamperometric degradation after 55 h. The electrochemical response depicts that the successful synthesis of MOF-derived ZnO/C/SS catalyst provided abundant active centers and boosted an electron- rich environment to promote its future prosperity and facilitate practical applications for electrochemical water-splitting.

Synthesis and characterization of hexagonal ferrite Co2Sr2Fe12O22 with doped polypyrrole composites

Irshad Ali,Abdul Shakoor,M.U. Islam,Muhammad Saeed,Muhammad Naeem Ashiq,M.S. Awan 한국물리학회 2013 Current Applied Physics Vol.13 No.6

Y-type hexagonal ferrite Co2Sr2Fe12O22 was prepared by microemulsion route. A conducting polymer,polypyrrole was chemically synthesized and doped with dodecylbenzenesulphonic acid (PPy$DBSA). FTIR and magnetic properties of Co2Sr2Fe12O22 were investigated and compared with composite made by mixing the Co2Sr2Fe12O22 with this conducting polymer PPyeDBSA by 1:1 molar ratio. Phase analysis was performed by using X-ray diffraction (XRD). The microstructure was examined by scanning electron microscopy (SEM) showing heterogonous distribution of grains. The field dependent magnetic properties of the prepared samples were investigated at room temperature by using vibrating sample magnetometer (VSM). It has been observed that mixing of polymer in ferrite plays a crucial role in enhancing the coercivity, while saturation magnetization (Ms) and remanance were observed to decrease. Due to fine grain size, the density of grain boundaries increases where the domain wall pinning can take place,hence the coercivity of the composite samples increases. Appreciable improved value of coercivity guaranteed the use of these synthesized materials in the recording media, which is ¼1896(Oe) in the present samples. The suitable signal-to-noise ratio in the high density recording media can be achieved due to small particles size of this synthesized composite, which is expected in the present ferriteepolymer composite sample.

Efficient rGO-supported CeO2–Y2O3–Nd2O3 nanocomposite electrocatalyst for water splitting (HER/OER) in alkaline medium

Munawar Tauseef,Bashir Ambreen,Batoo Khalid Mujasam,Mukhtar Faisal,Nadeem Muhammad Shahid,Hussain Sajjad,Manzoor Sumaira,Ashiq Muhammad Naeem,Khan Shoukat Alim,Koc Muammer,Iqbal Faisal 한국세라믹학회 2024 한국세라믹학회지 Vol.61 No.4

Increasing demand for hydrogen as fuel from the electrolysis of water, along with the immense use of alternative energy strategies, is vital to meet future energy demands. Herein, we report the very first time that a quaternary composite CeO 2– Y2O3–Nd2O3 modified with rGO support on nickel foam substrate demonstrated excellent catalyst behavior. Systematic structural and morphological studies are performed to understand the effects of the rare-earth-based elements on hydrogen and oxygen evolution reactions in an alkaline (1.0 M KOH) electrolyzer. X-ray photoelectron spectroscopy (XPS) analysis revealed the presence of multiple valence states, synergistic interaction, and electronic effects between the prepared nanocom- posite components, resulting in excellent catalytic activity. The quaternary composite has excellent OER/HER characteristics than individual oxides with low overpotential 272 mV (OER) and 303 mV (HER) to produce standard 10  mAcm−2 current density. Moreover, the quaternary composite catalyst with more active sites also displayed a larger surface area (9.03  cm 2) and double-layered capacitance (36.12 mF). The corresponding electrode is efficient and maintains its stability over 50 h toward OER/HER, which can greatly contribute to practical operation.

Nanostructural engineered titanium dioxide by rare earth metals dual doping for electrochemical supercapacitor applications

Munawar Tauseef,Manzoor Sumaira,Jabbour Karam,Nisa Mehar Un,Sardar Sonia,Mukhtar Faisal,Osman Sameh M.,Esan Muhammad Fahad,Ashiq Muhammad Naeem,Iqbal Faisal 한국세라믹학회 2024 한국세라믹학회지 Vol.60 No.4

High-porosity nanostructured materials are in high demand for use in electrochemical supercapacitor applications due to their immense specific surface areas, which allow for significant energy storage capacity. Using Ti(CH3COO)2⋅2H2O and nitrate salts of dopants such as Cerium, Samarium, Holmium, and Ytterbium as precursors, we synthesized mixed metal-doped TiO2 nanostructures using a facile sol–gel approach. The Ce/Ho Co-doped TiO2 nanostructures-based supercapacitor electrodes retained 99.28% of their capacity after 5,000 cycles, with a specific capacitance of 1714 F g−1 at a current density of 2.0 A g−1. The enhanced electrochemical performance of the optimized Co-doped TiO2 nanostructures can be attributed to the increased TiO2 conductivity due to the optimization of co-doping and the increased specific surface area as a result of structural porosity. These results suggest that porous co-doped TiO2 nanostructures have a wide spectrum of potential electrochemical applications.

Facile synthesis of rGO/PANI/ZnO ternary nanocomposites for energy storage devices

Abbas Sajid,Elqahtani Zainab Mufarreh,Yasmeen Ghazala,Manzoor Suryyia,Manzoor Sumaira,Al-Buriahi M. S.,Alrowaili Z. A.,Ashiq Muhammad Naeem 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.1

Due to the dire energy needs and the unavailability of energy storage devices, supercapacitors have become an inescapable substitute for energy storage systems. As a high energy density electrode material, we offer rGO/PANI/ZnO ternary nanocomposite designed via the polymerization method and are characterized by various analytical techniques. The results show that rGO/PANI/ZnO has the best capacitive behavior, with a specific capacity of 1546 F/g at 2 mV/s on the eggshell membrane electrode (ESME). The nanocomposite rGO/PANI/ZnO, on the other hand, presented the best cycling stability, retaining 97% of capacity after 3000 cycles. This is due to the fast transfer of electrons between rGO/ZnO and PANI in an electrochemical charge storage device. This research encompasses an enhanced flexible PANI-based electrode to become viable innovative wearable sensor alternative.