Enhanced photoelectrochemical properties of NiO nanoparticles-decorated TiO2 nanotube arrays for water splitting

Jasim, Marwah Mohammed; Dakhil, Osama Abdul Azeez; Hussein, Emad H.; Abdullah, Hussein I.

doi:10.1007/s10854-020-03620-3

Cited by 11 publications

(4 citation statements)

References 42 publications

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“…Furthermore, the nanotubes work as channels for facilitating the electron and ion transport at the interfaces of the photocatalyst/dye. Because of the significant charge transfer, the development of a p-n heterojunction at the interface of TiO 2 NTs and NiO NPs can greatly boost photocatalytic activity and delay electron-hole recombination [ 48 , 49 , 50 ].…”

Section: Resultsmentioning

confidence: 99%

Fabrication of TiO2/NiO p-n Nanocomposite for Enhancement Dye Photodegradation under Solar Radiation

et al. 2022

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A p-n nanocomposite based on TiO2 nanotubes (NTs) and NiO nanoparticles (NPs) was designed and optimized in this study to improve the photocatalytic performance of methylene blue (MB). The hydrothermal technique has been used to produce TiO2/NiO nanocomposites with different NiO NPs weight ratios; 1TiO2:1NiO, 1TiO2:2NiO, and 1TiO2:3NiO. The crystal phase, chemical composition, optical properties, and morphology of TiO2/NiO were explored by various techniques. TiO2 NTs have a monoclinic structure, while NiO NPs have a cubic structure, according to the structural study. The bandgap of TiO2 NTs was reduced from 3.54 eV to 2.69 eV after controlling the NiO NPs weight ratio. The TiO2/2NiO nanocomposite showed the best photodegradation efficiency. Within 45 min of solar light irradiation, the efficiency of MB dye degradation using TiO2/2NiO hits 99.5% versus 73% using pure TiO2 NTs. Furthermore, the catalytic photodegradation efficiency did not deteriorate significantly even after five reusability cycles, intimating the high stability of the TiO2/2NiO nanocomposite. This suggests that the loading of NiO NPs into TiO2 NTs lowers the recombination of photo-produced electron/hole pairs and enlarged solar spectral response range, which results in improved photocatalytic activity. The mechanism of charge transfer in the TiO2/NiO and kinetic models were discussed for the photodegradation of MB.

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Section: Resultsmentioning

confidence: 99%

Fabrication of TiO2/NiO p-n Nanocomposite for Enhancement Dye Photodegradation under Solar Radiation

et al. 2022

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“…Комбинирование TiO 2 c узкозонными полупроводниками также приводит к поглощению видимого света с последующей инжекцией электронов в зону проводимости TiO 2 , что обеспечивает его фотокаталитическую активность. Другой способ улучшения фотокаталитических свойств TiO 2это добавление частиц полупроводников p-типа проводимости [11][12][13]. В результате в структуре образуются p−n-гетеропереходы, поскольку TiO 2 является полупроводником n-типа [14].…”

Section: Introductionunclassified

Влияние условий синтеза на структурные, оптические и электрофизические свойства нанокомпозитов TiO-=SUB=-2-=/SUB=-/Cu-=SUB=-x-=/SUB=-O

Мартышов¹,

Павликов²,

Кытина³

et al. 2023

Журнал Технической Физики

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Nanocomposites based on anodic titanium oxide nanotubes with copper oxide nanoparticles were formed and their structural, optical, and electrophysical properties were studied. Defects in the structure of the samples were identified by electron paramagnetic resonance and it was shown that, as a result of copper oxide deposition, CuO nanoparticles were formed on the surface of nanotubes. It was found that the conductivity of the structure decreases by several orders of magnitude with an increase in the number of deposition cycles. It was shown that this effect could be associated with the formation of TiO2 /CuO heterojunctions on the nanotube surface. It was shown for the first time that an increase in the content of copper oxide in TiO2/CuxO nanocomposites was accompanied by a decrease in conductivity and an increase in the number of defects.

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“…The combination of TiO 2 with low-energy-gap semiconductors also leads to the visible light absorption with subsequent injection of electrons into the conduction band of TiO 2 , which ensures its photocatalytic activity. Another way to improve the photocatalytic properties of TiO 2 is to add p-type semiconductor particles [11][12][13]. As a result, p−n-heterojunctions are formed in the structure, since TiO 2 is n-type semiconductor [14].…”

Section: Introductionmentioning

confidence: 99%

Influence of Synthesis Conditions on the Structural, Optical, and Electrophysical Properties of TiO-=SUB=-2-=/SUB=-/Cu-=SUB=-x-=/SUB=-O Nanocomposites

et al. 2023

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Nanocomposites based on anodic titanium oxide nanotubes with copper oxide nanoparticles were formed and their structural, optical, and electrophysical properties were studied. Defects in the structure of the samples were identified by electron paramagnetic resonance and it was shown that, as a result of copper oxide deposition, CuO nanoparticles were formed on the surface of nanotubes. It was found that the conductivity of the structure decreases by several orders of magnitude with an increase in the number of deposition cycles. It was shown that this effect could be associated with the formation of TiO2/CuO heterojunctions on the nanotube surface. It was shown for the first time that an increase in the content of copper oxide in TiO2/CuxO nanocomposites was accompanied by a decrease in conductivity and an increase in the number of defects. Keywords: titanium oxide, nanotubes, nanocomposites, copper oxide nanoparticles, defects, conductivity.

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Enhanced photoelectrochemical properties of NiO nanoparticles-decorated TiO2 nanotube arrays for water splitting

Cited by 11 publications

References 42 publications

Fabrication of TiO2/NiO p-n Nanocomposite for Enhancement Dye Photodegradation under Solar Radiation

Fabrication of TiO2/NiO p-n Nanocomposite for Enhancement Dye Photodegradation under Solar Radiation

Влияние условий синтеза на структурные, оптические и электрофизические свойства нанокомпозитов TiO-=SUB=-2-=/SUB=-/Cu-=SUB=-x-=/SUB=-O

Influence of Synthesis Conditions on the Structural, Optical, and Electrophysical Properties of TiO-=SUB=-2-=/SUB=-/Cu-=SUB=-x-=/SUB=-O Nanocomposites

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