Ultrasound-assisted successive ionic layer adsorption and reaction synthesis of Cu2O cubes sensitized TiO2 nanotube arrays for the enhanced photoelectrochemical performance

Wang, Qingyao; Sun, Congcong; Liu, Zhiyuan; Tan, Xinying; Zheng, Shixin; Zhang, Han; Wang, Yujie; Gao, Shanmin

doi:10.1016/j.materresbull.2018.11.021

Cited by 25 publications

(5 citation statements)

References 28 publications

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“…The XPS spectra of the O 1s level are shown in Figure e, and the broad peak from 529–534 eV can be fitted to two peaks located at 531.7 and 530.8 eV, respectively. The peaks at the binding energy values of 530.8 and 531.7 eV can be attributed to the O–Cu bond from the Cu 2– x Ho x O samples and the O–H bond from the chemisorbed oxygen caused by surface hydroxyl groups, respectively. − O in the stair-structured Cu 2– x Ho x O ( x = 0.85%) is in O 2– states compared to the standard binding energy of O. The double peaks of spin–orbital cleavage with the banding energy at 932.5 and 952.1 eV belong to Cu 2p 3/2 and Cu 2p 5/2 , respectively (Figure f).…”

Section: Resultsmentioning

confidence: 97%

Stair-Structured Cu_2–xHo_xO Materials with Adjustable Optical and Magnetic Properties

Chuai,

Xing,

Zhang

et al. 2024

Crystal Growth & Design

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Stair-structured Cu 2−x Ho x O is synthesized by gas− liquid phase chemical deposition and a subsequent heat treatment method. The UV−visible spectrum of the stair-structured Cu 2 O and Cu 2−x Ho x O exhibits strong absorption peaks in the UV region, and the Ho atom doping reduces the band gap of Cu 2 O. Photoluminescence spectroscopy demonstrates that the luminescence intensity of the stair-structured Cu 2−x Ho x O first increases with Ho addition and then decreases as the Ho 3+ concentration increases further. The fluorescence lifetime curves show that the fluorescence lifetime of the stair-structured Cu 2 O samples is shortened by Ho 3+ ion doping. Stair-structured Cu 2−x Ho x O exhibits distinct and stronger room-temperature ferromagnetism, and its saturation magnetization value shows a parabolic trend with the increase of Ho 3+ ion doping concentration. The firstprinciples calculation results show that the magnetic properties of the staircase-structured Cu 2 O are mainly due to the splitting of spin-up and spin-down electrons near the Fermi energy. The density of states shows that the Ho atom doping contributes to the magnetism of the stair-structured Cu 2−x Ho x O sample, and the values of M s of the samples can be regulated by the Ho atom doping concentration. The magnetic properties reflect a strong d−d exchange interaction between the Ho ions.

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Section: Resultsmentioning

confidence: 97%

Stair-Structured Cu_2–xHo_xO Materials with Adjustable Optical and Magnetic Properties

Chuai,

Xing,

Zhang

et al. 2024

Crystal Growth & Design

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“…The most investigated semiconductor materials include BiVO 4 ,Fe 2 O 3 , CuCoO 2 ,WO 3 , and TiO 2 [147]. Other semiconductor materials such as Cu 2 O [24,148,149], ZnO [150,151], TiO 2 [152,153], and CdO [28] were also produced using SILAR method but the PEC performances are quite low under visible light due to their wide bandgap.…”

Section: Photoelectrochemical Water Splittingmentioning

confidence: 99%

Thin Films Processed by SILAR Method

Patwary¹

2023

Thin Films - Deposition Methods and Applications

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SILAR is one of the simplest techniques in terms of the better flexibility of the substrate choice, capability of large-area fabrication, deposition of stable and adherent film, low processing temperature for the film fabrication as well as reproducibility. This technique is very budget friendly since it does not require any sophisticated equipment. Moreover, various fabrication parameters such as solution concentration, precursors, the number of cycles during immersion, pH, annealing, doping, and growth temperature affect the rate of fabrication as well as the structural, optical, and electrical properties of the fabricated thin films led the technique unique to study in an extensive manner. A chapter regarding different aspects of semiconductors-based optoelectronics by SILAR has yet to be published. This chapter will concern the recent progress that has recently been made in different aspects of materials processed by the SILAR. It will describe the theory, mechanism, and factors affecting SILAR deposition as well as recent advancements in the field. Finally, conclusions and perspectives concerning the use of materials in optoelectronic devices will be represented.

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“…Li et al reported that octahedral Cu 2 O-modified TiO 2 nanotube arrays could efficiently perform the photocatalytic reduction of CO 2 . Cu 2 O could narrow the band gap of TiO 2 and impede the reassociation of photogenerated electron–hole pairs, thus enhancing the oxidization efficiency by the photoelectric reaction. ,− Gao et al fabricated a TNTAs/Cu 2 O anode to exhibit excellent photoelectric conversion and photoelectrocatalytic removal of organic dyes and Cr(VI) . Arotiba et al constructed TNTAs/Cu 2 O anodes for the photoelectrocatalytic degradation of ciprofloxacin, an antibiotic .…”

Section: Introductionmentioning

confidence: 99%

Heterostructure Cu₂O@TiO₂Nanotube Array Coated Titanium Anode for Efficient Photoelectrocatalytic Oxidation of As(III) in Aqueous Solution

Wang

Zhang

et al. 2021

Ind. Eng. Chem. Res.

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Addressing the ever-growing arsenite pollution in groundwater has become an essential and urgent issue for ensuring the safety of human beings and the environment. It is highly attractive to preoxidize As(III) to relatively low toxic As(V) for further efficient arsenic removal by adsorption, ion exchange, or coagulation. In this study, a novel heterostructure Cu2O@TiO2 nanotube array coated titanium anode (CTNTA) was fabricated by combination of electrochemical anodization and electrodeposition and used for the highly efficient photoelectrocatalytic oxidation conversion of As(III) to As(V) in aqueous solution. The morphology, composition, and photoelectric performances of the CTNTA anode were systematically characterized. The effect of the loading amount of Cu2O nanoparticles on the photoelectrocatalytic oxidation kinetics of As(III) was investigated, and the comparison study among photocatalytic, electrocatalytic, and photoelectrocatalytic oxidations of As(III) was also explored to demonstrate the synergistic effect of As(III) oxidation conversion performance. The heterostructure CTNTAs-1.00 delivered a substantially enhanced photoelectrocatalytic oxidation ratio of As(III) at 95% within 30 min at a current density of 10 mA·cm–2 under visible-light irradiation. The electrochemical deposition amount of Cu2O nanoparticles on TiO2 nanotube arrays (TNTAs) was found to be positively correlated with the achievement of boosted As(III) oxidation efficiency. The high photoelectrocatalytic oxidation performance of the CTNTA was ascribed to the favored separation efficiency of photoinduced carriers and electron–hole pairs under both visible light irradiation and electric potential conditions. The photoelectrocatalytic oxidation reaction mechanism was proven to be ascribed to the active species of holes (h+), superoxide radicals (•O2 –), and hydroxyl radicals (•OH). These results highlight the high conversion rate of As(III) by the photoelectrocatalytic oxidation reaction on such a nanostructured anode, which offers a promising methodology for further in-depth oxidation of As(III) in aqueous solution.

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Ultrasound-assisted successive ionic layer adsorption and reaction synthesis of Cu2O cubes sensitized TiO2 nanotube arrays for the enhanced photoelectrochemical performance

Cited by 25 publications

References 28 publications

Stair-Structured Cu_2–xHo_xO Materials with Adjustable Optical and Magnetic Properties

Stair-Structured Cu_2–xHo_xO Materials with Adjustable Optical and Magnetic Properties

Thin Films Processed by SILAR Method

Heterostructure Cu₂O@TiO₂Nanotube Array Coated Titanium Anode for Efficient Photoelectrocatalytic Oxidation of As(III) in Aqueous Solution

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Ultrasound-assisted successive ionic layer adsorption and reaction synthesis of Cu2O cubes sensitized TiO2 nanotube arrays for the enhanced photoelectrochemical performance

Cited by 25 publications

References 28 publications

Stair-Structured Cu2–xHoxO Materials with Adjustable Optical and Magnetic Properties

Stair-Structured Cu2–xHoxO Materials with Adjustable Optical and Magnetic Properties

Thin Films Processed by SILAR Method

Heterostructure Cu2O@TiO2Nanotube Array Coated Titanium Anode for Efficient Photoelectrocatalytic Oxidation of As(III) in Aqueous Solution

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Product

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Stair-Structured Cu_2–xHo_xO Materials with Adjustable Optical and Magnetic Properties

Stair-Structured Cu_2–xHo_xO Materials with Adjustable Optical and Magnetic Properties

Heterostructure Cu₂O@TiO₂Nanotube Array Coated Titanium Anode for Efficient Photoelectrocatalytic Oxidation of As(III) in Aqueous Solution