Uniform spheroidal nanoassemblies of magnetite using Tween surfactants: influence of surfactant structure on the morphology and electrochemical performance

Maqbool, Qysar; Singh, Chanderpratap; Paul, Amit; Srivastava, Aasheesh

doi:10.1039/c4tc02841d

Cited by 25 publications

(9 citation statements)

References 44 publications

(36 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It was found that low electrical conductivity of iron oxide is major obstacle for use as electrode material in ECs 34,35 . For refine this issue, three solutions of novel nano-structures fabricating [36][37][38][39][40][41][42][43] , metal ions doping 44 , and also combination with conductive carbon-based nanomaterials [45][46][47] have been established. Reviewing the results of these works indicates that performance of iron oxide electrode is improved due to enhancing its conductivity and redox activity.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Supercapacitive and Superparamagnetic Performances of Iron Oxide Nanoparticles through Yttrium Cations Electro-chemical Doping

et al. 2018

View full text Add to dashboard Cite

A one-pot electrosynthesis platform is reported for fabrication of Y 3+ doped iron oxide nanoparticles (Y-IONPs). In this procedure, Y-IONPs are electro-deposited from an additive-free aqueous solution of iron(III) nitrate, iron(II) chloride and yttrium chloride. The analysis data provided by X-ray diffraction (XRD), field emission electron microscopy (FE-SEM) and energy-dispersive X-ray (EDX) confirmed that the deposited Y-IONPs sample is composed of magnetite nanoparticles (size≈20nm) doped with about 10wt% Y 3+ cations. The performance of the prepared Y-IONPs as supercapacitor electrode material was studied using cyclic voltammetry (CV) and galvanostat charge-discharge (GCD) tests. The obtained electrochemical data showed that Y-IONPs provide SCs as high as 190.3 and 138.9 F g −1 at the discharge loads of 0.25 and 1 A g −1 , respectively, and capacity retentions of 95.9% and 88.5% after 2000 GCD cycling. Furthermore, the results of vibrating sample magnetometer measurements confirmed better superparamagnetic behavior of Y-IONPs (Mr=0.32 emu g-1 and H Ci = 6.31 G) as compared with pure IONPs (Mr=0.95 emu g-1 and H Ci = 14.62 G) resulting from their lower Mr and Hci values. Based on the obtained results, the developed electro-synthesis method was introduced as a facile procedure for the preparation of high performance metal ion doped magnetite nanoparticles.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhancing the Supercapacitive and Superparamagnetic Performances of Iron Oxide Nanoparticles through Yttrium Cations Electro-chemical Doping

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Utilizing these unique features of non‐ionic surfactants, Prouzet and coworkers reported synthesis of mesoporous silica materials using PEO and Tween surfactants as structure‐directing agents, albeit without any definite demonstration of size‐ and shape‐control of the resulting materials . We have recently shown the synthesis of uniform spheroidal nanoassemblies of magnetite and mesoporous nano “Koosh balls” of MnO 2 using Tween surfactants as structure‐directing agents ,. In this work, we have extended the utility of Tween 20 for mesoporous nanomaterial synthesis by preparing uniform MSNs with wormhole‐like framework‐confined porosity.…”

Section: Resultsmentioning

confidence: 90%

Tween 20‐Assisted Synthesis of Uniform Mesoporous Silica Nanospheres with Wormhole Porosity for Efficient Intracellular Curcumin Delivery

2018

Self Cite

View full text Add to dashboard Cite

We report a green and straightforward protocol to prepare uniform mesoporous silica nanospheres (MSNs) as well as core/ shell-like spherical particles by utilizing small amounts of Tween 20, a biocompatible and biodegradable surfactant. Due to small amount of surfactant employed in the synthesis, these MSNs can be easily purified and readily dispersed in water. TEM analysis showed presence of wormhole-like framework-confined mesoporosity along with high surface area (upto 250 m 2 / g) in these MSNs. Size-tunability of these nanospheres was achieved by simple variation of the ethanol:water ratio during the synthesis. Powder X-ray diffraction (XRD) and low angle XRD, respectively, showed amorphous nature and similar pore ordering for all the samples prepared using this protocol. These MSNs showed effective, post-synthetic uptake of model hydrophobic drug curcumin to yield stable aqueous dispersions. High biocompatibility and ready internalization by mammalian cells mainly through clathrin-independent, caveolae-and lipid raft-mediated endocytosis was observed for these MSNs. Efficient intracellular delivery of curcumin using these MSNs was achieved in MDA-MB-231 (Breast cancer) cells. Thus, this work offers facile protocol for synthesis of uniform and biocompatible MSNs with promising drug delivery capabilities.

show abstract

“…Tween 20 is ab iocompatible, nonionic surfactant with multiple oxyethylene residues.I narecent study,w er eported uniform nanoassemblies of magnetite produced by employingt his surfactant. [36] Tween 20 has al ow criticalm icelle concentration (CMC) of 8.0 10 À5 m in water at 21 8C. [37] This low CMC value implies that much smaller quantities of this surfactant are neededf or nanomaterial synthesis, mitigating the requirement for ad etailed purification protocol, as is often necessary for other surfactant templates.…”

Section: Resultsmentioning

confidence: 99%

Nano “Koosh Balls” of Mesoporous MnO₂: Improved Supercapacitor Performance through Superior Ion Transport

Maqbool

Singh

Jash

et al. 2017

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

Manganese dioxide nanomaterials with "Koosh-ball"-like morphology (MnO -KBs) as well as worm-like nanotubes (MnO -NWs) are obtained by employing Tween 20 as the reducing and structure-directing agent, and KMnO as a MnO precursor. Whereas the MnO -KBs are interconnected through tubular extensions, the MnO -NWs are largely disconnected. Both MnO -KBs and MnO -NWs have large BET surface areas (>200 m g ), and are thermally robust up to 300 °C. Electrochemical studies reveal that the highest specific capacitance (C ) obtained for MnO -KBs (272 F g ) is significantly higher than that of MnO -NWs (129 F g ). The C values correlate well with the electroactive surface areas of the materials: MnO -KBs have a significantly higher electrolyte-accessible surface area. Electrochemical impedance spectroscopy (EIS) reveals a higher electron-transfer rate at the electrode/electrolyte interface for MnO -KBs than for MnO -NWs. The multiple tubular interconnections between individual MnO -KBs allow improved ion penetration and act as conduits for their propagation, shortening the diffusion distances of the ions from external electrolytes to the interior of the MnO framework. Thus, this work exemplifies the importance of interconnections for enhancing the electrochemical performance of nanomaterials employed for energy storage.

show abstract

Uniform spheroidal nanoassemblies of magnetite using Tween surfactants: influence of surfactant structure on the morphology and electrochemical performance

Abstract: Uniform spherical nanoassemblies of Fe3O4 prepared using tween surfactants.

Cited by 25 publications

References 44 publications

Enhancing the Supercapacitive and Superparamagnetic Performances of Iron Oxide Nanoparticles through Yttrium Cations Electro-chemical Doping

Enhancing the Supercapacitive and Superparamagnetic Performances of Iron Oxide Nanoparticles through Yttrium Cations Electro-chemical Doping

Tween 20‐Assisted Synthesis of Uniform Mesoporous Silica Nanospheres with Wormhole Porosity for Efficient Intracellular Curcumin Delivery

Nano “Koosh Balls” of Mesoporous MnO₂: Improved Supercapacitor Performance through Superior Ion Transport

Contact Info

Product

Resources

About

Uniform spheroidal nanoassemblies of magnetite using Tween surfactants: influence of surfactant structure on the morphology and electrochemical performance

Abstract: Uniform spherical nanoassemblies of Fe3O4 prepared using tween surfactants.

Cited by 25 publications

References 44 publications

Enhancing the Supercapacitive and Superparamagnetic Performances of Iron Oxide Nanoparticles through Yttrium Cations Electro-chemical Doping

Enhancing the Supercapacitive and Superparamagnetic Performances of Iron Oxide Nanoparticles through Yttrium Cations Electro-chemical Doping

Tween 20‐Assisted Synthesis of Uniform Mesoporous Silica Nanospheres with Wormhole Porosity for Efficient Intracellular Curcumin Delivery

Nano “Koosh Balls” of Mesoporous MnO2: Improved Supercapacitor Performance through Superior Ion Transport

Contact Info

Product

Resources

About

Nano “Koosh Balls” of Mesoporous MnO₂: Improved Supercapacitor Performance through Superior Ion Transport