A promoted photocatalysis system trade-off between thermodynamic and kinetic via hierarchical distribution dual-defects for efficient H2 evolution

Gao, Jiaqi; Xue, Jinbo; Shen, Qianqian; Liu, Tianwu; Zhang, Xiaochao; Liu, Xuguang; Jia, Husheng; Li, Qi; Wu, Yucheng

doi:10.1016/j.cej.2021.133281

Cited by 59 publications

(22 citation statements)

References 59 publications

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“…After annealing at 400 • C for 30 min, the amorphous TiO 2 has changed to the anatase phase (PDF Card No. : 73-1765) [18]. After the aluminothermic reduction at 400 • C, the obtained black TiO 2 nanotubes show the diffraction peaks of anatase TiOin addition to the weak peaks of alumina.…”

Section: Resultsmentioning

confidence: 96%

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Photocatalytic and eletrocatalytic activity of black TiO ₂ nanotube arrays by aluminothermic reduction

Jiang

Liu

et al. 2022

Micro & Nano Letters

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The black TiO2 nanotubes arrays were prepared by anodizing and aluminothermic reduction process. The prepared samples were characterized by X‐ray diffraction (XRD), SEM, UV‐visible absorption spectroscopy and X‐ray photoelectron spectroscopy (XPS). The photochemical/electrical catalytic activity of the samples before and after blackening treatment was tested. Comparing with the raw TiO2, the macrostructure of the black TiO2 nanotube arrays changes a little, and the tubal walls become a little thicker and rough. The photocatalytic hydrogen production rate has an obvious enhancement (from 8.9 µmol cm−2 h−1 to 22.8 µmol cm−2 h−1) after the blackening treatment and the electrocatalytic H2 evolution rate is also improved with a lower onset potential. The increment of trivalent Ti3+ on the surface is confirmed by XPS and presented by the colour changing of the samples (from white colour to black). The hybrid energy band gap and reduced charge transfer barrier are proved to be essential in promoting the catalytic properties of the black TiO2 nanotube arrays.

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Section: Resultsmentioning

confidence: 96%

“…In this experiment, TiO 2 nanotube arrays were grown on titanium substrate by anodic oxidization. After the titanium oxide nanotube arrays were obtained, the samples were reduced by aluminothermic reduction in the N 2 atmosphere [13–17]. Crystal structure, solar energy collection and photoelectric properties of the samples were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic and eletrocatalytic activity of black TiO ₂ nanotube arrays by aluminothermic reduction

Jiang

Liu

et al. 2022

Micro & Nano Letters

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“…Gao et al prepared black TiO 2 nanotube arrays with dual defects consisting of bulk N doping and surface oxygen vacancies [ 101 ]. Urea was utilized as the N precursor during the anodic oxidation process [ 101 ].…”

Section: Strategies For Promoting Photocatalytic Activity Of Black Tiomentioning

confidence: 99%

Recent Advances in Black TiO2 Nanomaterials for Solar Energy Conversion

Liao

Wang

et al. 2023

Nanomaterials

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Titanium dioxide (TiO2) nanomaterials have been widely used in photocatalytic energy conversion and environmental remediation due to their advantages of low cost, chemical stability, and relatively high photo-activity. However, applications of TiO2 have been restricted in the ultraviolet range because of the wide band gap. Broadening the light absorption of TiO2 nanomaterials is an efficient way to improve the photocatalytic activity. Thus, black TiO2 with extended light response range in the visible light and even near infrared light has been extensively exploited as efficient photocatalysts in the last decade. This review represents an attempt to conclude the recent developments in black TiO2 nanomaterials synthesized by modified treatment, which presented different structure, morphological features, reduced band gap, and enhanced solar energy harvesting efficiency. Special emphasis has been given to the newly developed synthetic methods, porous black TiO2, and the approaches for further improving the photocatalytic activity of black TiO2. Various black TiO2, doped black TiO2, metal-loaded black TiO2 and black TiO2 heterojunction photocatalysts, and their photocatalytic applications and mechanisms in the field of energy and environment are summarized in this review, to provide useful insights and new ideas in the related field.

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“…As it is necessary to seek highly efficient, abundant, and stable photoanode materials to improve the performance of PEC water splitting, a variety of strategies have been explored to develop novel catalysts, including surface engineering [11,12], energy band structure engineering [13], and strain engineering [14,15]. Recently, nanocomposites have shown great potential for photoelectrocatalytic hydrogen evolution.…”

Section: Introductionmentioning

confidence: 99%

Oxygen vacancy-mediated WO3 phase junction to steering photogenerated charge separation for enhanced water splitting

Shen

Zhang

et al. 2022

J Adv Ceram

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Effective charge separation and transfer is deemed to be the contributing factor to achieve high photoelectrochemical (PEC) water splitting performance on photoelectrodes. Building a phase junction structure with controllable phase transition of WO3 can further improve the photocatalytic performance. In this work, we realized the transition from orthorhombic to monoclinic by regulating the annealing temperatures, and constructed an orthorhombic-monoclinic WO3 (o-WO3/m-WO3) phase junction. The formation of oxygen vacancies causes an imbalance of the charge distribution in the crystal structure, which changes the W-O bond length and bond angle, accelerating the phase transition. As expected, an optimum PEC activity was achieved over the o-WO3/m-WO3 phase junction in WO3-450 photoelectrode, yielding the maximum O2 evolution rate roughly 32 times higher than that of pure WO3-250 without any sacrificial agents under visible light irradiation. The enhancement of catalytic activity is attributed to the atomically smooth interface with a highly matched lattice and robust built-in electric field around the phase junction, which leads to a less-defective and abrupt interface and provides a smooth interfacial charge separation and transfer path, leading to improved charge separation and transfer efficiency and a great enhancement in photocatalytic activity. This work strikes out on new paths in the formation of an oxygen vacancy-induced phase transition and provides new ideas for the design of catalysts.

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A promoted photocatalysis system trade-off between thermodynamic and kinetic via hierarchical distribution dual-defects for efficient H2 evolution

Cited by 59 publications

References 59 publications

Photocatalytic and eletrocatalytic activity of black TiO ₂ nanotube arrays by aluminothermic reduction

Photocatalytic and eletrocatalytic activity of black TiO ₂ nanotube arrays by aluminothermic reduction

Recent Advances in Black TiO2 Nanomaterials for Solar Energy Conversion

Oxygen vacancy-mediated WO3 phase junction to steering photogenerated charge separation for enhanced water splitting

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A promoted photocatalysis system trade-off between thermodynamic and kinetic via hierarchical distribution dual-defects for efficient H2 evolution

Cited by 59 publications

References 59 publications

Photocatalytic and eletrocatalytic activity of black TiO 2 nanotube arrays by aluminothermic reduction

Photocatalytic and eletrocatalytic activity of black TiO 2 nanotube arrays by aluminothermic reduction

Recent Advances in Black TiO2 Nanomaterials for Solar Energy Conversion

Oxygen vacancy-mediated WO3 phase junction to steering photogenerated charge separation for enhanced water splitting

Contact Info

Product

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About

Photocatalytic and eletrocatalytic activity of black TiO ₂ nanotube arrays by aluminothermic reduction

Photocatalytic and eletrocatalytic activity of black TiO ₂ nanotube arrays by aluminothermic reduction