Facile and Eco-Friendly Synthesis of Finger-Like Co3O4 Nanorods for Electrochemical Energy Storage

Sun, Shijiao; Zhao, Xiangyu; Yang, Meng; Ma, Liqun; Shen, Xiaodong

doi:10.3390/nano5042335

Cited by 23 publications

(14 citation statements)

References 52 publications

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“…Co 3 O 4 is a useful material for many technological applications, including ion-lithium batteries [1], gas sensors [2], and supercapacitors [3]. The magnetism of Co 3 O 4 has also attracted much attention because nanostructured Co 3 O 4 exhibits antiferromagnetism and superparamagnetism [4].…”

Section: Introductionmentioning

confidence: 99%

Fast Synthesis of Co₃O₄ by Microwave-Assisted Hydrothermal Treatment

Medina

Zenatti

Escote

2020

Journal of Nanomaterials

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This work describes a fast and simple procedure that combines the virtues of the microwave-assisted hydrothermal method with an oxidizing agent to produce Co3O4 nanocubes and nanoplates. We observed that particle morphology and size depend on the synthesis time and oxidizing agent (urea and hydrogen peroxide). The X-ray diffraction results showed that the samples are single phase, with crystallite sizes of approximately 30 nm. A similar crystalline domain is observed in the transmission electronic images. Magnetic measurements revealed the influence of the size and morphology of the particles on the magnetic curves. These measurements on the nanoplate samples revealed a paramagnetic behaviour at higher temperatures, and the presence of a cusp at that temperature was defined as TP. The TP decreases from 36 K to 21 K when the size of the plate particles decreases from ~70 nm to 10 nm. These samples also present weak ferromagnetism below TP, which is attributed to a superparamagnetic blockade state. The nanocube samples have a lower magnetic susceptibility magnitude and weak ferromagnetism behaviour at room temperature. Our results show that this synthesis produces Co3O4 nanoplates and nanocubes with interesting magnetic properties related to their shape and size.

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Section: Introductionmentioning

confidence: 99%

Fast Synthesis of Co₃O₄ by Microwave-Assisted Hydrothermal Treatment

Medina

Zenatti

Escote

2020

Journal of Nanomaterials

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“…Up to now, Co 3 O 4 nanoparticles with various morphologies such as nanospheres [31,32], nanorods [33][34][35][36], nanowalls [37], nanoneedles [38], nanobelts [39], nanowires [40], nanoflowers [41], nanotubes [42,43], nanofibers [44], nanodiscs [45], and nanochains [46] have been synthesized with different approaches, including urea precipitation [47], chemical vapor deposition [48], sol-gel [49], microwave-assisted process [50], wet chemical approach [51], and hydrothermal method [39,[52][53][54]. Hydrothermal methods are widely used to produce various different Co 3 O 4 nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermally Produced Cobalt Oxide Nanostructures at Different Temperatures and Effect on Phase Transition Temperature and Threshold Voltage of Nematic Liquid Crystal Host

Eskalen¹,

Kerli²,

Özğan³

2017

Cobalt

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In this study, cobalt oxide Co 3 O 4 nanostructured material is synthesized by hydrothermal method by using different concentration of cobalt acetate salt at unique hydrothermal reaction time for five different hydrothermal reaction temperatures 105, 120, 140, 160, and 180 C. The obtained nanoparticles are annealed at 300 C for 5 h. Co 3 O 4 nanostructures are determined by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV-vis spectroscopy. The hydrothermally produced samples were reannealed at 550 C, and morphological and structural properties were investigated deeply again. The effect of annealing temperature on morphologies and crystalline structure of cobalt oxide nanoparticle (NP) was also investigated. Nanopyramids and nanorods are two main morphologically obtained structures from the hydrothermal experiment. Nematic liquid crystal mixture E7 is doped with Co 3 O 4 nanorod. Phase transition and threshold voltage of pure and Co 3 O 4 NP-doped E7 LC are examined successfully. It reveals that for Co 3 O 4 NP-doped E7 phase transition temperature and threshold voltage increased very slightly.

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“…have been prepared through various methods. However, simple and ecofriendly approaches are highly desirable for the synthesis of nanomaterials . Herein, we have prepared Co 3 O 4 nanohexagons using a biomolecule ascorbic acid as reducing and capping agent.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Graphene/Cobalt Oxide Nanohexagons for the Selective Detection of Dopamine

et al. 2016

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1Introduction Dopamine (4-(2-aminoethyl) benzene-1,2d iol) is ac atecholamine derivative,s ecreted naturally in the mid brain region of mammals [1].A saneurotransmitter, dopamine (DA) distributioni nther ange of 10 À6 to 10 À8 Ma ts ubstantia nigra( mid brain region)i sr esponsible for the humanm etabolism [1a, 2].I tc ontrols simultaneously the functioning of both central nervous system and renal system [3].A lthough DA has an umber of inevitable roles,its abnormals ecretioninhuman beings leads to various disorders relatedw ith human brain. And so,t he determination of DA level is highly important for diagnosing diseases namely Parkinsons, Alzheimers, epilepsy, pheochromocytoma and so on [4].N umber of methods including electrochemical [1b],c hromatography [5],s pectrophotometry [6] and colorimetry [7] therefore have been used for the determination of DA.P articularly,e lectrochemical method is preferred for the determinationo f DA in recent years on account of its simplicity,s hort working time,l ow cost and high sensitivity compared to other methods [8].H owever, electrode fouling, large over potential and selectivity are the main key issues to ignore the unmodified electrode in the fabricationo fd opamine sensor. To minimize these key issues,n umbero fmetal and metal oxides supported along with carbon materials have been used to modify the electrodes urface in recent years [9].Cobalt oxide (Co 3 O 4 )h as proved to be ap romisingi norganicm etal oxide for the electrodef abrication in numerousa pplications such as super capacitors [10],l ithium ion batteries[ 11],s odium-ion batteries [12] and biosensors [13] ascribed to its low cost, structural flexibility, high theoretical specificc apacitance, great redoxa ctivity, durability and good catalytic activity.C o 3 O 4 is aP -type semiconductor with directb and gap of 1.5 eV and 2.19 eV [14].B ased on its structural feasibility,s everal nano structures includingr ods [15],t ubes [16],w ires [17],r ing [18], bubbles [19] etc. have been prepared throughv arious methods. However, simple and ecofriendly approaches are highly desirable for the synthesis of nanomaterials [20].H erein, we have prepared Co 3 O 4 nanohexagons using ab iomolecule ascorbic acid as reducing and capping agent. Recently,C o 3 O 4 and its compositesh ave been prepareda nd used for the fabrication of sensors and biosensors [21].M ost of the fabricated Co 3 O 4 based nanocomposite sensors are used for the determination of biomolecules like glucose and hydrogenp eroxide [13,22].T o increase the sensitivity of fabricated Co 3 O 4 modified glassy carbon electrode,r esearchers have focused on the preparation and fabrication of graphene based Co 3 O 4 sensors [21,23].H igh surface area, good conductivity are the main advantages for choosing graphene as as upporting mat relative to other carbon materials such as carbon Abstract:T his work presents as imple green approachf or the chemicals ynthesis of cobalt oxide nano hexagons (Co 3 O 4 NHs) with an average size of 160 AE 40 nm incorporatedg raphene na...

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Facile and Eco-Friendly Synthesis of Finger-Like Co3O4 Nanorods for Electrochemical Energy Storage

Cited by 23 publications

References 52 publications

Fast Synthesis of Co₃O₄ by Microwave-Assisted Hydrothermal Treatment

Fast Synthesis of Co₃O₄ by Microwave-Assisted Hydrothermal Treatment

Hydrothermally Produced Cobalt Oxide Nanostructures at Different Temperatures and Effect on Phase Transition Temperature and Threshold Voltage of Nematic Liquid Crystal Host

Facile Synthesis of Graphene/Cobalt Oxide Nanohexagons for the Selective Detection of Dopamine

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Facile and Eco-Friendly Synthesis of Finger-Like Co3O4 Nanorods for Electrochemical Energy Storage

Cited by 23 publications

References 52 publications

Fast Synthesis of Co3O4 by Microwave-Assisted Hydrothermal Treatment

Fast Synthesis of Co3O4 by Microwave-Assisted Hydrothermal Treatment

Hydrothermally Produced Cobalt Oxide Nanostructures at Different Temperatures and Effect on Phase Transition Temperature and Threshold Voltage of Nematic Liquid Crystal Host

Facile Synthesis of Graphene/Cobalt Oxide Nanohexagons for the Selective Detection of Dopamine

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Fast Synthesis of Co₃O₄ by Microwave-Assisted Hydrothermal Treatment

Fast Synthesis of Co₃O₄ by Microwave-Assisted Hydrothermal Treatment