Supercapacitive cobalt oxide (Co3O4) thin films by spray pyrolysis

Shinde, V.R.; Mahadik, Shashibhushan B.; Gujar, T.P.; Lokhande, C.D.

doi:10.1016/j.apsusc.2005.09.004

Cited by 414 publications

(180 citation statements)

References 20 publications

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“…4 ) is the most stable phase in the Co-O system and adopts a spinel-type cubic structure, unlike the high temperature phase CoO, which crystallizes in a cubic rock salt structure. 5 Previously Co 3 O 4 has been deposited by radio frequency magnetron sputtering, 6 sol-gel processing, 7,8 electron beam evaporation, 9 spray pyrolysis, 10 pulsed laser deposition, 11 (metal organic) chemical vapor deposition (CVD), 2,[12][13][14][15][16] and atomic layer deposition (ALD). 5,17,18 All these methods can produce high purity Co 3 O 4 .…”

mentioning

confidence: 99%

Remote Plasma Atomic Layer Deposition of Co3O4 Thin Films

Donders

Knoops

Sanden

et al. 2011

J. Electrochem. Soc.

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confidence: 99%

Remote Plasma Atomic Layer Deposition of Co3O4 Thin Films

Donders

Knoops

Sanden

et al. 2011

J. Electrochem. Soc.

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“…Figure 6 shows the time course curves of O 2 and N 2 evolution over the as-synthesized oxynitrides loaded with CoO x (2 wt % Co) nanoparticles and suspended in aqueous AgNO 3 solution under visible light irradiation (k [ 420 nm). The loaded CoO x nanoparticles as a cocatalyst for photocatalytic water oxidation can trap photo-generated holes to separate effectively the photo-excited charges using a cocatalyst/ photocatalyst interface and to improve the photocatalytic [7,[36][37][38]. The detected O 2 gas was evolved as a result of the oxidation of H 2 O to O 2 by photo-generated holes on CoO x nanoparticles:…”

Section: Crystal Structuresmentioning

confidence: 99%

Perovskite Sr1−x Ba x W1−y Ta y (O,N)3: synthesis by thermal ammonolysis and photocatalytic oxygen evolution under visible light

Hojamberdiev

Stabler

Vranković

et al. 2017

Mater Renew Sustain Energy

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N) 3 exhibited the highest amount of evolved O 2 gas due to its higher specific surface area and lower concentration of intrinsic defects. During the photocatalytic reaction, the N 2 gas is also evolved because of the self-oxidation of oxynitrides consuming photo-generated holes. The estimated TONs of the oxynitride samples exceeded one, evidencing that the observed O 2 gas evolution reactions were catalytic. Accordingly, the photostability enhancement of oxynitrides reduces the loss of photo-generated charge carriers and increases their photocatalytic activity.Graphical abstract

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“…Co3O4 is an important magnetic p-type semiconductor having direct optical band gaps as 1.48 and 2.19 eV [67], but 1.6 eV is also reported in the literature [68,69]. It is believed that transition metal oxides are good candidates as electrode materials, because they have variation in oxide states which is suitable for effective redox charge transfer [70][71][72].…”

Section: Figure 22 the Unit Cell Structure Of Co3o4(reproduced Frommentioning

confidence: 99%

Synthesis, Characterization and Applications of Metal Oxide Nanostructures

Hussain¹

2014

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The main objective of nanotechnology is to build self-powered nanosystems that are ultrasmall in size, exhibit super sensitivity, extraordinary multi functionality, and extremely low power consumption. As we all know that 21st century has brought two most important challenges for us. One is energy shortage and the other is global warming. Now to overcome these challenges, it is highly desirable to develop nanotechnology that harvests energy from the environment to fabricate self-power and low-carbon nanodevices. Therefore a self-power nanosystem that harvests its operating energy from the environment is an attractive proposition. This is also feasible for nanodevices owing to their extremely low power consumption. One advantageous approach towards harvesting energy from the environment is the utilization of semiconducting piezoelectric materials, which facilitate the conversion of mechanical energy into electrical energy. Among many piezoelectric materials ZnO has the rare attribute of possessing both piezoelectric and semiconducting properties. But most applications of ZnO utilize either the semiconducting or piezoelectric property, and now it’s time to fully employ the coupled semiconducting-piezoelectric properties to form the basis for electromechanically coupled nanodevices. Since wurtzite zinc oxide (ZnO) is structurally noncentral symmetric and has the highest piezoelectric tensor among tetrahedrally bonded semiconductors, therefore it becomes a promising candidate for energy harvesting applications. ZnO is relatively biosafe and biocompatible as well, so it can be used at large scale without any harm to the living environment. The synthesis of another transition metal oxide known as Co3O4 is also important due to its potential usage in the material science, physics and chemistry fields. Co3O4 has been studied extensively due to low cost, low toxicity, the most naturally abundant, high surface area, good redox, easily tunable surface and structural properties. These significant properties enable Co3O4 fruitful for developing variety of nanodevices. Co3O4 nanostructures have been focused considerably in the past decade due to their high electro-chemical performance, which is essential for developing highly sensitive sensor devices. I started my work with the synthesis of ZnO nanostructures with a focus to improve the amount of harvested energy by utilizing oxygen plasma treatment. Then I grow ZnO nanorods on different flexible substrates, in order to observe the effect of substrate on the amount of harvested energy. After that I worked on understanding the mechanism and causes of variation in the resulting output potential generated from ZnO nanorods. My next target belongs to an innovative approach in which AFM tip decorated with ZnO nanorods was utilized to improve the output energy. Then I investigated Co3O4 nanostructures though the effect of anions and utilized one of the nanostructure to develop a fast and reliable pH sensor. Finally to take the advantage of higher degree of redox chemistry of NiCo0O...

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Supercapacitive cobalt oxide (Co3O4) thin films by spray pyrolysis

Cited by 414 publications

References 20 publications

Remote Plasma Atomic Layer Deposition of Co3O4 Thin Films

Remote Plasma Atomic Layer Deposition of Co3O4 Thin Films

Perovskite Sr1−x Ba x W1−y Ta y (O,N)3: synthesis by thermal ammonolysis and photocatalytic oxygen evolution under visible light

Synthesis, Characterization and Applications of Metal Oxide Nanostructures

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