Effect of substrate temperature on structure and optical properties of Co<sub>3</sub>O<sub>4</sub> films prepared by spray pyrolysis technique

Abbas, Soumaia; Aboud, Ahmed A.; Irfan, Muhammad; Alam, Shah

doi:10.1088/1757-899x/60/1/012058

Cited by 21 publications

(11 citation statements)

References 18 publications

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“…In all films the intensities of the recorded peaks are noticed to be week. Such small intensities of the diffraction peaks has been recorded before in our previous work [19,40]. The small peaks intensities could be attributed to the high cooling rate the films subjected to since all films are taken directly from the hot surface (450 o C) which gives a high rate of cooling since the film goes to room temperature in less than a minute.…”

Section: X-ray Diffraction and Microstructural Studysupporting

confidence: 60%

“…That could be attributed to the difference in the measurement technique and the possible agglomeration in the film during deposition. In our previous work on Co3O4 [40] agglomeration phenomena were observed and discussed.…”

Section: X-ray Diffraction and Microstructural Studymentioning

confidence: 94%

“…Pure and (Fe, Ni) co-doped Co3O4 thin films were prepared using a spray pyrolysis technique [40,41]. All films were deposited onto an amorphous glass substrate at constant temperature 450 º C, the substrate to nozzle distance, and the airflow rate were 30 cm and 25 L/min respectively.…”

Section: Co3o4 Thin Film Preparationmentioning

confidence: 99%

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Outstanding stability and photoelectrochemical catalytic performance of (Fe, Ni) co-doped Co3O4 photoelectrodes for solar hydrogen production

Abdelmoneim

Naji

Wagenaars

et al. 2021

International Journal of Hydrogen Energy

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Section: X-ray Diffraction and Microstructural Studysupporting

confidence: 60%

Section: X-ray Diffraction and Microstructural Studymentioning

confidence: 94%

See 1 more Smart Citation

Outstanding stability and photoelectrochemical catalytic performance of (Fe, Ni) co-doped Co3O4 photoelectrodes for solar hydrogen production

Abdelmoneim

Naji

Wagenaars

et al. 2021

International Journal of Hydrogen Energy

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“…The total reaction occurs rapidly with the generation of micronano structured products (Figure a). The aerosol speed, liquid reactant concentrations, gas pressure, and calcination temperature will influence the final products. − For example, with a 0.3 M Co(NO 3 ) 2 ·6H 2 O aqueous solution as the reactant, Co 3 O 4 could be prepared with an air pressure of 2–3 atm, a flow rate of 3–4 cm 3 /min, and a temperature of 350 °C . Usually, the spray pyrolysis products are directly deposited on conductive substrates such as gold, conductive glass, and Ti , and applied as catalysts for reactions such as oxygen reduction and ethylene glycol oxidation.…”

Section: Preparationmentioning

confidence: 99%

Spinels: Controlled Preparation, Oxygen Reduction/Evolution Reaction Application, and Beyond

et al. 2017

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Spinels with the formula of ABO (where A and B are metal ions) and the properties of magnetism, optics, electricity, and catalysis have taken significant roles in applications of data storage, biotechnology, electronics, laser, sensor, conversion reaction, and energy storage/conversion, which largely depend on their precise structures and compositions. In this review, various spinels with controlled preparations and their applications in oxygen reduction/evolution reaction (ORR/OER) and beyond are summarized. First, the composition and structure of spinels are introduced. Then, recent advances in the preparation of spinels with solid-, solution-, and vapor-phase methods are summarized, and new methods are particularly highlighted. The physicochemical characteristics of spinels such as their compositions, structures, morphologies, defects, and substrates have been rationally regulated through various approaches. This regulation can yield spinels with improved ORR/OER catalytic activities, which can further accelerate the speed, prolong the life, and narrow the polarization of fuel cells, metal-air batteries, and water splitting devices. Finally, the magnetic, optical, electrical, and catalytic applications beyond the OER/ORR are also discussed. The future applications of spinels are considered to be closely related to environmental and energy issues, which will be aided by the development of new species with precise preparations and advanced characterizations.

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“…24 Co 3 O 4 has also demonstrated resistive switching properties, which are important regarding its potential applications in RRAM devices. 25,26 Co 3 O 4 and ZrO 2 oxides may be grown using different physical and chemical techniques, such as solution spray pyrolysis, [27][28][29] chemical vapor deposition, [30][31][32][33] pulsed laser deposition, 34,35 solgel, 36,37 electron-beam evaporation, 38,39 or, atomic layer deposition (ALD). [40][41][42][43][44][45][46] Herewith, ALD may be regarded as the ultimate method providing the most precise thickness control over large substrate areas.…”

mentioning

confidence: 99%

Properties of Atomic Layer Deposited Nanolaminates of Zirconium and Cobalt Oxides

Seemen

Rähn

Kalam

et al. 2018

ECS J. Solid State Sci. Technol.

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Five-layer crystalline thin film structures were formed, consisting of ZrO 2 and Co 3 O 4 alternately grown on Si(100) substrates by atomic layer deposition at 300 • C using ZrCl 4 and Co(acac) 3 as the metal precursors and ozone as the oxygen precursor. The performance of the laminate films was dependent on the relative content of constituent oxide layers. The magnetization in these films was nonlinear, saturative, and with very weak coercive fields. Electrical measurements revealed the formation of significant polarization versus external field loops and implied some tendency toward memristive behavior. 59 have so far been quite scarce. In the earlier study devoted to ZrO 2 -Co 3 O 4 nanocomposites grown by ALD using the same chemistry based on cobalt acetylacetonate, zirconium tetrachloride and ozone, 59 the deposition process for cobalt oxide was investigated and established, determining suitable evaporation temperature for Co(acac) 3 precursor, as well as by recording linear relationship between growing mass and the amount of deposition cycles. Using the suitable deposition parameters, ALD growth of ZrO 2 /Co 3 O 4 double layers was demonstrated, together with their performance as dielectric and magnetic materials.In connection with the demand for materials, which could be applied in novel memories because of their advanced magnetic and electric properties, this study was devoted to the description of ZrO 2 -Co 3 O 4 nanolaminates, grown by ALD using ZrCl 4 and Co(acac) 3 as the metal precursors and ozone as the oxygen precursor. Elemental and phase composition, thickness, surface morphology and the polarization characteristics of the samples in the presence of an external magnetic or electric field were determined. In addition, the z E-mail: helina.seemen@ut.ee resistive switching and other electrical characteristics of ZrO 2 -Co 3 O 4 nanolaminates were studied to evaluate whether such films can imply a tendency toward memristive behavior. ExperimentalThe film growth experiments were carried out in a flow-type inhouse built hot-wall ALD reactor 60 at 300 ± 2 • C using ZrCl 4 (99.99%, Sigma Aldrich) and Co(acac) 3 (99.9%, Volatec Ltd.) [acac = tris(2,4-pentanedionato)] as the metal precursors, O 3 as the oxygen precursor and N 2 (99.999%, AGA) as the carrier and purge gas. The ZrCl 4 and Co(acac) 3 were evaporated at 160 ± 2• C and 120 ± 2 • C, respectively, from open boats inside the reactor and transported to the substrates by the carrier gas flow. O 3 was generated from O 2 (99.999%, AGA, Linde Group) in a BMT Messtechnik 802 N ozone generator. The O 3 concentration output of the generator measured with BMT Masstechnik 964 analyzer was ∼262 g/m 3 at the normal pressure. During the deposition, the chamber pressure varied in the range of 205-260 Pa. In all cases, a single ALD cycle was started with a metal precursor pulse and continued with a purge of the reaction zone with the pure carrier gas, oxygen precursor pulse and another purge. The precursor pulse durations and purge lengths in the case of ZrO 2 ...

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Effect of substrate temperature on structure and optical properties of Co₃O₄ films prepared by spray pyrolysis technique

Cited by 21 publications

References 18 publications

Outstanding stability and photoelectrochemical catalytic performance of (Fe, Ni) co-doped Co3O4 photoelectrodes for solar hydrogen production

Outstanding stability and photoelectrochemical catalytic performance of (Fe, Ni) co-doped Co3O4 photoelectrodes for solar hydrogen production

Spinels: Controlled Preparation, Oxygen Reduction/Evolution Reaction Application, and Beyond

Properties of Atomic Layer Deposited Nanolaminates of Zirconium and Cobalt Oxides

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Effect of substrate temperature on structure and optical properties of Co3O4 films prepared by spray pyrolysis technique

Cited by 21 publications

References 18 publications

Outstanding stability and photoelectrochemical catalytic performance of (Fe, Ni) co-doped Co3O4 photoelectrodes for solar hydrogen production

Outstanding stability and photoelectrochemical catalytic performance of (Fe, Ni) co-doped Co3O4 photoelectrodes for solar hydrogen production

Spinels: Controlled Preparation, Oxygen Reduction/Evolution Reaction Application, and Beyond

Properties of Atomic Layer Deposited Nanolaminates of Zirconium and Cobalt Oxides

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Effect of substrate temperature on structure and optical properties of Co₃O₄ films prepared by spray pyrolysis technique