Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Arbab Mohammad Toufiq is active.

Publication


Featured researches published by Arbab Mohammad Toufiq.


Nanotechnology | 2012

Diameter-controlled synthesis of α-Mn2O3 nanorods and nanowires with enhanced surface morphology and optical properties

Qurat-ul-ain Javed; Feng Ping Wang; M Y Rafique; Arbab Mohammad Toufiq; Q S Li; Hasan Mahmood; W Khan

Single crystalline α-Mn(2)O(3) nanorods, and nanowires with and without nanoparticles on them have been successfully synthesized by a template-free hydrothermal route. The variation in hydrothermal temperature has not only affected the diameter of the nanostructure but also noticeably affected the morphology and optical properties of the α-Mn(2)O(3) nanostructure. The influence of temperature on the diameter, crystallinity, surface morphology and optical properties of the α-Mn(2)O(3) nanostructure have been characterized by x-ray diffraction, scanning electron microscopy, energy dispersive x-ray analysis, transmission electron microscopy, high resolution transmission electron microscopy, Raman spectroscopy and UV-visible spectroscopy and photoluminescent (PL) spectroscopy. The results showed in our experimental conditions that single crystalline nanorods of the α-Mn(2)O(3) were obtained at a temperature of 180 °C, while single crystalline nanowires were obtained by increasing the temperature to 240 and 300 °C. Nanowires with nanoparticles on them were obtained by increasing the temperature to 240 °C and nanowires without nanoparticles on them were obtained by increasing the temperature to 300 °C. The nanorods and nanowires obtained had a well-defined morphology. The nanowires synthesized at 300 °C exhibited an intense orange band PL spectrum.


Chinese Physics B | 2012

Canted antiferromagnetic and optical properties of nanostructures of Mn2O3 prepared by hydrothermal synthesis

Qurat-ul-ain Javed; Wang Feng-Ping; M. Yasir Rafique; Arbab Mohammad Toufiq; M. Zubair Iqbal

We have reported new magnetic and optical properties of Mn2O3 nanostructures. The nanostructures have been synthesized by the hydrothermal method combined with the adjustment of pH values in the reaction system. The particular characteristics of the nanostructures have been analyzed by employing X-Ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), Raman spectroscopy (RS), UV—visible spectroscopy, and the vibrating sample magnetometer (VSM). Structural investigation manifests that the synthesized Mn2O3 nanostructures are orthorhombic crystal. Magnetic investigation indicates that the Mn2O3 nanostructures are antiferromagnetic and the antiferromagnetic transition temperature is at TN = 83 K. Furthermore, the Mn2O3 nanostructures possess canted antiferromagnetic order below the Neel temperature due to spin frustration, resulting in hysteresis with large coercivity (1580 Oe) and remnant magnetization (1.52 emu/g). The UV—visible spectrophotometry was used to determine the transmittance behaviour of Mn2O3 nanostructures. A direct optical band gap of 1.2 eV was acquired by using the Davis—Mott model. The UV—visible spectrum indicates that the absorption is prominent in the visible region, and transparency is more than 80% in the UV region.


Nanotechnology | 2013

Influence of SiO2 on the structure-controlled synthesis and magnetic properties of prismatic MnO2 nanorods.

Arbab Mohammad Toufiq; Fengping Wang; Qurat-ul-ain Javed; Yan Li

Silicon dioxide-doped tetragonal MnO2 single crystalline prismatic nanorods have been successfully synthesized through a facile hydrothermal route at a temperature of 250 ° C with a reaction time as quick as 5 h. The synthesized MnO2 prismatic nanorods were characterized by x-ray diffraction, field emission scanning electron microscopy, energy dispersive x-ray analysis, transmission electron microscopy, high resolution transmission electron microscopy with selected area electron diffraction and Raman spectroscopy. Experimental results show that single crystalline tetragonal MnO2 nanorods have been successfully synthesized at all doping concentrations and that nanorods with a prismatic surface morphology have been obtained at 20 mass% of SiO2. The diameter of as-prepared MnO2 nanorods increases from 125 to 250 nm on increasing the dopant concentration. X-ray photoelectron spectroscopy analysis confirms the presence of valence Si (2p) of SiO2 in the as-prepared MnO2 nanostructures. The intensity of Raman modes clearly increases with increasing doping concentration, indicating an improvement in the structural aspects of the MnO2 nanorods. The magnetic properties of the products have been evaluated using a vibrating sample magnetometer, revealing that the as-prepared MnO2 nanorods exhibit weak ferromagnetic behavior at room temperature. The Néel temperature of the as-obtained products is calculated as 97 K. On the basis of the structural information, a growth mechanism is proposed for the formation of prismatic-like 1D MnO2 nanorods.


Modern Physics Letters B | 2013

PHOTOLUMINESCENCE SPECTRA AND MAGNETIC PROPERTIES OF HYDROTHERMALLY SYNTHESIZED MnO2 NANORODS

Arbab Mohammad Toufiq; Fengping Wang; Qurat-ul-ain Javed; Quanshui Li; Yan Li

In this paper, single crystalline tetragonal MnO2 nanorods have been synthesized by a simple hydrothermal method using MnSO4⋅ H2O and Na2S2O8 as precursors. The crystalline phase, morphology, particle sizes and component of the as-prepared nanomaterial were characterized by employing X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED) and energy-dispersive X-ray spectroscopy (EDS). The photoluminescence (PL) emission spectrum of MnO2 nanorods at room temperature exhibited a strong ultraviolet (UV) emission band at 380 nm, a prominent blue emission peak at 453 nm as well as a weak defect related green emission at 553 nm. Magnetization (M) as a function of applied magnetic field (H) curve showed that MnO2 nanowires exhibited a superparamagnetic behavior at room temperature which shows the promise of synthesized MnO2 nanorods for applications in ferrofluids and the contrast agents for magnetic resonance imaging. The magnetization versus temperature curve of the as-obtained MnO2 nanorods shows that the Neel transition temperature is 94 K.


Journal of Nanoscience and Nanotechnology | 2018

Electrochemical Properties of Controlled Size Mn3O4 Nanoparticles for Supercapacitor Applications

Hidayat Ullah Shah; Fengping Wang; Arbab Mohammad Toufiq; Shujaat Ali; Zia Ul Haq Khan; Yan Li; Jianling Hu; Kang He

A simple and controlled strategy has been used to synthesise Mn3O4 nanoparticles (NPs) via hydrothermal method. The Mn3O4 nanoparticles were further applied for supercapacitor electrode materials. The unique squared-shape Mn3O4 nanoparticles exhibited excellent electrochemical performance due to the small size and porous architecture. After electrochemical testing, the Mn3O4 NPs based electrode showed a large specific capacitance (380 F g-1, 1.0 mAcm-2) and good cycling stability (88.6%) of the initial capacitance after 5000 cycles in 1.0 M Na2SO4 solution. These results may provide useful guidelines for materials selection, synthesis, size and configuration designs for the novel energy storage devices based on transitional metal oxides.


Modern Physics Letters B | 2013

MAGNETIC PROPERTIES OF MnO2 SHRIMPS-LIKE NANOSTRUCTURES SYNTHESIZED BY HYDROTHERMAL ROUTE

Arbab Mohammad Toufiq; Fengping Wang; Qurat-ul-ain Javed; Yan Li

In this paper, we report the field-dependent magnetization (M–H) and temperature-dependent magnetization (M–T) properties of hexagonal MnO2 shrimps-like nanostructures which have been successfully synthesized by hydrothermal route using KMnO4 and HNO3 as precursors. The magnetic properties were characterized by vibrating sample magnetometer (VSM). Field-dependent magnetization (M–H) measured at 300 K exhibit paramagnetic nature of MnO2 nanostructures, while an antiferromagnetic component is observed for the as-prepared product at 55 K. The Neel temperature (TN) is calculated as 89 K by plotting temperature-dependent magnetization (M–T) curve for the as-prepared MnO2 nanostructures. X-ray photoelectron spectroscopy (XPS) is employed to calculate the binding energies of Mn (2p3/2, 2p1/2) and O (1s) observed in the spectrum.


Modern Physics Letters B | 2014

Effect of hydrothermal dwell time on the diameter-controlled synthesis and magnetic property of MnO2 nanorods

Arbab Mohammad Toufiq; Fengping Wang; Qurat-ul-ain Javed; Yan Li

In this paper, single crystalline 1D tetragonal MnO2 pen-type nanorods were synthesized by varying the dwell time through a facile hydrothermal route at a reaction temperature of 250°C. X-ray diffraction (XRD) and transmission electron microscopy (TEM) studies showed that the diameter of MnO2 nanorods decreases from 460 nm to 250 nm with the increase in hydrothermal reaction time from 5 h to 15 h. Field-emission scanning electron microscopy (FESEM) and TEM studies revealed the evolution of improved surface morphology of MnO2 nanorods that are prepared with longer hydrothermal reaction time. The magnetic properties of the products were evaluated using vibrating sample magnetometer (VSM) at room temperature, which showed that the as-prepared samples exhibit weak ferromagnetic behavior. The effect of diameter on the magnetization values was observed and discussed in detail.


Modern Physics Letters B | 2014

Synthesis and characterization of 3D Cu0.45Mn0.55O2 nanoflowers with novel photoluminescence and magnetic properties

Arbab Mohammad Toufiq; Fengping Wang; Qurat-ul-ain Javed; Quanshui Li; Yan Li

In this paper, three-dimensional (3D) Cu0.45Mn0.55O2 nanoflowers self-assembled by interconnecting dense stacked single-crystalline nanoplates have been prepared using the template-free hydrothermal growth method. The morphology, phase structure and composition of the as-prepared nanomaterial were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) with selected area electron diffraction (SAED) and energy-dispersive X-ray spectroscopy (EDX). FESEM and TEM analyses show that the size of 3D Cu0.45Mn0.55O2 nanoflowers is in the range of 1–1.5 μm and the thickness of interconnected nanoplates is about 40 nm on the average. The photoluminescence (PL) spectra of the as-prepared Cu0.45Mn0.55O2 nanostructures at room temperature exhibits prominent emission bands located in red–violet spectral region. Moreover, magnetic investigations revealed the weak ferromagnetic behavior of the as-prepared Cu0.45Mn0.55O2 nanoflowers and reported for the first time using vibrating sample magnetometer (VSM).


Applied Physics A | 2014

Hydrothermal synthesis of MnO2 nanowires: structural characterizations, optical and magnetic properties

Arbab Mohammad Toufiq; Fengping Wang; Qurat-ul-ain Javed; Quanshui Li; Yan Li


Current Applied Physics | 2013

Influence of tungsten doping concentration on the electronic and optical properties of anatase TiO2

Matiullah Khan; Wenbin Cao; Ning Chen; Zahid Usman; Dil Faraz Khan; Arbab Mohammad Toufiq; Murad Ali Khaskheli

Collaboration


Dive into the Arbab Mohammad Toufiq's collaboration.

Top Co-Authors

Avatar

Fengping Wang

University of Science and Technology Beijing

View shared research outputs
Top Co-Authors

Avatar

Qurat-ul-ain Javed

University of Science and Technology Beijing

View shared research outputs
Top Co-Authors

Avatar

Yan Li

University of Science and Technology Beijing

View shared research outputs
Top Co-Authors

Avatar

Quanshui Li

University of Science and Technology Beijing

View shared research outputs
Top Co-Authors

Avatar

M. Yasir Rafique

University of Science and Technology Beijing

View shared research outputs
Top Co-Authors

Avatar

M. Zubair Iqbal

Chinese Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

Hidayat Ullah Shah

University of Science and Technology Beijing

View shared research outputs
Top Co-Authors

Avatar

Shujaat Ali

University of Science and Technology Beijing

View shared research outputs
Top Co-Authors

Avatar

Yongkui Cui

University of Science and Technology Beijing

View shared research outputs
Top Co-Authors

Avatar

Ziya Wang

University of Science and Technology Beijing

View shared research outputs
Researchain Logo
Decentralizing Knowledge