CuO/ZnO heterojunction nanoarrays for enhanced photoelectrochemical water oxidation

Liu, Chang; Meng, Fanling; Zhang, Lei; Zhang, Dantong; Wei, Shuting; Qi, Kun; Fan, Jinchang; Zhang, Haiyan; Cui, Xiaoqiang

doi:10.1016/j.apsusc.2018.11.054

Cited by 93 publications

(42 citation statements)

References 59 publications

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“…Among various oxide semiconductor materials, CuO is a common metal oxide, which is an intrinsic p-type semiconductor and shows a small band gap (1.2 eV) [17]. So far, CuO has been substantially explored for various fields of applications, such as field emitters, photocatalysis, and gas sensing [18,19,20,21,22,23]. Moreover, CuO has the advantage of its large abundance in nature, its low cost, its inability to pollute, and its simple synthesis like ZnO [24].…”

Section: Introductionmentioning

confidence: 99%

CuO/ZnO Heterojunction Nanorod Arrays Prepared by Photochemical Method with Improved UV Detecting Performance

Zhao

Shirolkar

et al. 2019

Nanomaterials

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CuO/ZnO heterojunction nanorod arrays were synthesized using a facile photochemical deposition strategy. The morphology of CuO was related to the concentration of Cu2+ in the Cu(NO3)2 solution, UV illumination time, and the air annealing temperature. A possible reaction mechanism was proposed. In the photochemical deposition process, the OH− was generated in the vicinity of the ZnO nanorod arrays and reacted with Cu2+ and NO3− in the solution to form Cu2(NO3)(OH)3/ZnO heterojunction nanorod arrays firstly, which were converted into CuO/ZnO heterojunction nanorod arrays completely after air annealing at a low temperature. The fabricated CuO/ZnO heterojunction nanorod arrays exhibits a well-defined rectifying characteristic and an improved photo-response performance compared with pure ZnO nanorod arrays.

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Section: Introductionmentioning

confidence: 99%

CuO/ZnO Heterojunction Nanorod Arrays Prepared by Photochemical Method with Improved UV Detecting Performance

Zhao

Shirolkar

et al. 2019

Nanomaterials

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“…All reactions were carried out under heating conditions, such as heat treatment and hydrothermal synthesis. The whole process can be described by the following equations [16].…”

Section: Heat-treatment Processmentioning

confidence: 99%

“…Because of that, CuO is usually used in combination with large-bandgap semiconductors, such as ZnO and TiO 2 , in order to improve their photocatalytic activity under solar light irradiation [15]. It was reported that the p-n heterojunction between ZnO and CuO has a high photocatalytic activity because of a better charge separation [16][17][18][19][20][21][22]. Liu et al [23] prepared CuO/ZnO nanocomposites by homogeneous coprecipitation and used them for the photocatalytic degradation of methyl orange.…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization and photocatalytic performance of heterostructured CuO–ZnO-loaded composite nanofiber membranes

Fang¹,

Liang²,

Xu³

2020

Beilstein J. Nanotechnol.

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Inorganic semiconductor oxides loaded on composite nanofibers (CNFs) have been widely applied in environmental monitoring, industry, aviation, and transportation. In this paper, heterostructured CuO-ZnO-loaded CNF membranes (CNFMs) were prepared successfully by a combination of electrospinning, heat treatment, and hydrothermal synthesis. The influence of the synthesis parameters on morphology, structure, and properties of the CNFMs was investigated, and the optimal process parameters were determined. Then, the CNFMs obtained with optimal process parameters were applied for the photocatalytic degradation of methyl orange. It was found that the CNFMs could be reused to degrade methyl orange at least three times, and the degradation rate remained above 90%. 631

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“…A simple chemical solution strategy was used to form Cu(OH)2 and Zn(OH)2, and then CuO and ZnO nanoparticles were successfully obtained by the heat treatment process, as shown in the following equations [16].…”

Section: Heat Treatment Processmentioning

confidence: 99%

“…Because of its narrow band gap, CuO is usually used in combination with large band gap semiconductor, such as ZnO and TiO2, to improve their photocatalytic activity under solar light irradiation [15]. It was reported that the p-n heterojunction composed of ZnO and CuO had a selective photocatalytic activity because the formation of p-n heterojunction could cause a better charge separation [16][17][18][19][20][21][22]. Liu et al [23] prepared CuO/ZnO nanocomposites by homogeneous coprecipitation method of coordination oxidation and used it for photocatalytic degradation of methyl orange.…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization and photocatalytic performance of hetero-structured CuO-ZnO loaded composite nanofiber membranes

Fang¹,

Yu²,

Xu³

2020

Preprint

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Owing to the nano-effect of nanofibers and special properties of semiconductor oxides, inorganic semiconductor oxides loaded composite nanofibers (CNFs) have been widely applied in environmental monitoring, industry, aviation, transportation and other fields. In this paper, the hetero-structured CuO-ZnO loaded CNF membranes (CNFMs) were prepared successfully by a combination of electrospinning technology, heat treatment and hydrothermal method. The effects of electrospinning, heat treatment and hydrothermal parameters on morphology, structure and properties of the CNFMs were investigated, and the optimal process parameters were determined. Then the hetero-structured CuO-ZnO loaded CNFMs obtained under the condition of the optimal process parameters were applied to photocatalytic degradation of methyl orange, and it was found the CNFMs could be reused to degrade methyl orange at least three times, and the degradation rate remained above 90%.

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CuO/ZnO heterojunction nanoarrays for enhanced photoelectrochemical water oxidation

Cited by 93 publications

References 59 publications

CuO/ZnO Heterojunction Nanorod Arrays Prepared by Photochemical Method with Improved UV Detecting Performance

CuO/ZnO Heterojunction Nanorod Arrays Prepared by Photochemical Method with Improved UV Detecting Performance

Preparation, characterization and photocatalytic performance of heterostructured CuO–ZnO-loaded composite nanofiber membranes

Preparation, characterization and photocatalytic performance of hetero-structured CuO-ZnO loaded composite nanofiber membranes

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