ORCID Profile
0000-0002-6021-8621
Current Organisations
University of Queensland
,
Dhaka University of Engineering & Technology
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Publisher: Portico
Date: 2019
Abstract: 1D α -hematite nanorods synthesized by a simple, scalable and novel green chemistry method exhibit fast kinetics of the interfacial Faradaic redox reaction yielding a specific capacitance of 140 F·g −1 when used as a battery-type electrode in a supercapacitor. Ample supply and environmental compatibility of the raw material suggest the use of this material. Insufficient stability suggest further investigations.
Publisher: Elsevier BV
Date: 12-2022
Publisher: Wiley
Date: 02-04-2019
Publisher: Informa UK Limited
Date: 21-01-2022
Publisher: Yarmouk University
Date: 06-2013
DOI: 10.12816/0001520
Publisher: The Electrochemical Society
Date: 09-10-2022
DOI: 10.1149/MA2022-0272518MTGABS
Abstract: SnO 2 has been studied as a negative electrode material for supercapacitors [1]. However, direct use of pure SnO 2 is not suitable because of its poor electrical conductivity. In order to mitigate this issue, various materials have been incorporated with pure SnO 2 , including graphene which is most favourable because of its high electrical conductivity (10 6 S/cm) and surface area (2630 m 2 /g), leading to highly conductive nanocomposites, and consequently high electrode capacitance [2]. Therefore, there is a growing interest to develop SnO 2 anchored graphene nanocomposites for fabrications of the supercapacitors negative electrode. In-situ growth and homogeneous distribution of the SnO 2 on the graphene flakes are highly desirable, as the maximum interaction of SnO 2 with the graphene would occur, resulting in high electrochemical performance. Besides, SnO 2 quantum dots (TOQDs), which is a 0D material, exhibit remarkable efficiency towards supercapacitors, as they have more surface area compared to 1D, 2D and 3D nanomaterials. However, the fabrication of the TOQDs is still challenging [3]. Therefore, in-situ and homogeneous distribution of the TOQDs on graphene flakes could yield an attractive nanocomposite for the supercapacitor studies. We have synthesized TOQDs embedded reduced graphene oxide (RGO) flakes i.e. (TOQDs/RGO) nanocomposite. A nanofluidic synthesis approach, which was applied to synthesis the TOQDs/RGO nanocomposite, leads to give in-situ and homogeneous growth of the SnO 2 -QDs on graphene flakes. The nanofluidic synthesis approach comprises the dropwise addition of a 1D-Sn(OH) 4 nanofluid [4] with graphene oxide (GO) nanofluid [5] at room temperature followed by a stirring, sonication and freeze-drying process, respectively. Finally the freeze-dried s le was calcined at 600 °C for 6 hrs under nitrogen gas to obtain the TOQDs/RGO nanocomposite. The synthesis approach with prime electrochemical studies performance is illustrated in Figure 1. A three-electrode supercapacitor was in idually constructed to perform cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). It is found that the developed TOQDs/RGO nanocomposite exhibits high capacitance. The results of these electrochemical studies revealed that the developed TOQDs/RGO nanocomposite can be used for high-performance supercapacitors. References: M. Hassan et al. , Tin-Based Materials for Supercapacitor. Inorganic Nanomaterials for Supercapacitor Design , CRC Press: 2019 pp 119-131. Lakra et al. , A mini-review: Graphene based composites for supercapacitor application. Inorg. Chem. Commun. 2021, 133 , 108929. Inomata et al. , Dendrimer-templated synthesis and characterization of tin oxide quantum dots deposited on a silica glass substrate. Chem. Mater. 2019, 31 (20), 8373-8382. I. U. Hoque et al. , One-dimensional Sn (iv) hydroxide nanofluid toward nonlinear optical switching. Mater. Horiz. 2020, 7 (4), 1150-1159. A. Khan et al. , Synthesis of graphene oxide nanofluid based micro-nano scale surfaces for high-performance nucleate boiling thermal management systems. Case Stud. Therm. Eng. 2021, 28 , 101436. Figure 1
Publisher: MDPI AG
Date: 31-01-2023
Abstract: Intrinsically conducting polymers ICPs can be combined with further electrochemically active materials into composites for use as active masses in supercapacitor electrodes. Typical ex les are inspected with particular attention to the various roles played by the constituents of the composites and to conceivable synergistic effects. Stability of composite electrode materials, as an essential property for practical application, is addressed, taking into account the observed causes and effects of materials degradation.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9MH01495K
Abstract: A new chemical method is developed for the preparation of a unique one-dimensional (1D) Sn( iv ) hydroxide nanofluid.
Publisher: Elsevier BV
Date: 06-2015
Publisher: Springer Science and Business Media LLC
Date: 28-07-2021
DOI: 10.1038/S41598-021-94885-Z
Abstract: The conventional dyeing process requires a substantial amount of auxiliaries and water, which leaches hazardous colored effluents to the environment. Herein, a newly developed sustainable spray dyeing system has been proposed for cotton fabric in the presence of reactive dyes, which has the potential to minimize the textile dyeing industries environmental impact in terms of water consumption and save significant energy. The results suggest that fresh dye solution can be mixed with an alkali solution before spray dyeing to avoid the reactive dye hydrolysis phenomenon. After that, drying at 60–100 °C, wet fixation treating for 1–6 min, and combined treatments (wet fixation + drying) were sequentially investigated and then dye fixation percentages were around 63–65%, 52–70%, and above 80%, respectively. Following this, fixation conditions were optimized using L 16 orthogonal designs, including wet fixation time, temperature, dye concentration, and pH with four levels where the “larger-the-better” function was selected to maximize the dye fixation rate. Additionally, the color uniformity and wash and rubbing fastnesses were at an acceptable level when both treatments were applied. Finally, the dyes were hydrolyzed after wet fixation, and the hydrolysis percentages were enhanced after the drying process.
Publisher: The Electrochemical Society
Date: 09-10-2022
DOI: 10.1149/MA2022-0272519MTGABS
Abstract: SnO 2 is one of the most efficient materials for lithium ion battery (LIBs) anodes as it can theoretically provide a reversible capacity of 790 mAh/g (graphite, 372 mAh/g) for alloying reaction with lithium ion [(i) SnO 2 + 4 Li + + 4 e - = 2 Li 2 O + Sn , (ii) Sn + xLi + + xe - = Li x Sn (0 ≤ x ≤ 4.4)] during charge-discharge process [1]. In addition, SnO 2 shows lowest operating potentials (average charge and discharge potentials: 0.3 V and 0.5 V vs. Li/Li + , respectively) in comparison with other transition metal oxides, facilitating a higher energy density when a full cell is constructed [2]. However, two issues: (1) poor electric conductivity, and (2) high volume fluctuation during lithiation-delithiation process (about 200-300%), limit its direct use as the anode material. To bit these issues, various carbon materials are employed to load the SnO 2 [3]. Graphene, a carbon allotrope, which possesses high electrical conductivity (106 s/cm), excellent mechanical flexibility (Young’s modulus up to 1.0 TPa) and high surface area (2630 m 2 /g) and in addition, lithium storage capacity of a single layer graphene is theoretically found to be 744 mAh/g. Consequently, graphene can be most suitable host to incorporate the SnO 2 [3]. We have tailored SnO 2 quantum dots (TOQDs) encapsulated reduced graphene oxide (RGO) nanocomposite (TOQDs/RGO) by in-situ growth of the TOQDs in the RGO flakes. A nanofluidic synthesis approach has been developed using 1D-Sn(OH) 4 nanofluid [4] and graphene oxide (GO) nanofluid [5] as prim precursors for the homogeneous encapsulation of the TOQDs in RGO flakes. The 1D-Sn(OH) 4 nanofluid was dropwise added to the graphene oxide (GO) nanofluid with continuous stirring. Then the resultant mixture was sonicated to get a nanofluidic mixture which was freeze-dried followed by calcination at 600 °C for 6 hrs under nitrogen gas. During these processes, in-situ growth of the TOQDs was proceeded on the RGO plane, leading to give their homogeneous distribution with encapsulation on the RGO plane. The cyclic voltammetry (CV) and glavanostatic charge-discharge (GCD) were performed on an Iviumstat Multichannel Potentiostat using a three-electrode cell and two-electrode cell, respectively. It is found that the developed TOQDs/RGO nanocomposite provides high reversible specific capacity with excellent rate capability. The results of these electrochemical studies implied that the developed TOQDs/RGO nanocomposite could be utilized for high-performance LIBs. References Lu et al. , Porous SnO 2 /Graphene composites as anode materials for lithium-ion batteries: morphology control and performance improvement. Energy Fuels 2020, 34 (10), 13126-13136. Deng et al. ,The developments of SnO 2 /graphene nanocomposites as anode materials for high performance lithium ion batteries: a review. J. Power Sources 2016, 304 , 81-101. Han et al. , Caging tin oxide in three-dimensional graphene networks for superior volumetric lithium storage. Nat. commun. 2018, 9 (1), 1-9. I. U. Hoque et al. , One-dimensional Sn (iv) hydroxide nanofluid toward nonlinear optical switching. Mater. Horiz. 2020, 7 (4), 1150-1159. A. Khan et al. , Synthesis of graphene oxide nanofluid based micro-nano scale surfaces for high-performance nucleate boiling thermal management systems. Case Stud. Therm. Eng. 2021, 28 , 101436.
Publisher: Springer Science and Business Media LLC
Date: 15-01-2021
Publisher: Elsevier BV
Date: 04-2021
Publisher: Elsevier BV
Date: 06-2017
Publisher: Elsevier BV
Date: 02-2022
Location: Bangladesh
No related grants have been discovered for Md. Ikram Ul Hoque.