N‐Doped TiO<sub>2</sub>/SrTiO<sub>3</sub> Heterostructured Nanotubes for High‐Efficiency Photoelectrocatalytic Properties under Visible‐Light Irradiation

Huang, Juanru; Tan, Xin; Yu, Tao; Hu, Wenli; Zhao, Lin; Liu, Huan; Zou, Yunling

doi:10.1002/celc.201500078

Cited by 11 publications

(8 citation statements)

References 76 publications

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“…between TiO 2 and STO/TiO 2 was contributed from an intrinsic combination of STO and TiO 2 O 2p orbital. 29 The further decreased BG between STO/TiO 2 and H:(STO/TiO 2 ) after hydrogenation is consistent with a strong absorption observed in the range of visible light (Figure 1a). 3.1.2.…”

Section: Methodssupporting

confidence: 82%

“…This systematically decreasing behavior was observed among the materials obtained in the formation of the STO composite, hydrogenation, and Au-NP loading process. The BG narrowing between TiO 2 and STO/TiO 2 was contributed from an intrinsic combination of STO and TiO 2 O 2p orbital . The further decreased BG between STO/TiO 2 and H:(STO/TiO 2 ) after hydrogenation is consistent with a strong absorption observed in the range of visible light (Figure a).…”

Section: Resultssupporting

confidence: 71%

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Synergistic Effects of Plasmonic Gold and Perovskite-Type SrTiO₃ for Enhanced Photocatalytic Performance of TiO₂ Nanotube Arrays

et al. 2021

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Hydrogenated SrTiO 3 /TiO 2 (H:(STO/TiO 2 )) with unique heterostructured arrays was prepared, followed by the immobilization of plasmonic Au nanoparticles to form robust composite photoelectrodes. The synergistic effects of heterocoupling of perovskite-type STO on TiO 2 nanotube arrays and plasmonic Au-decoration substantially improved the photocatalytic performance with visible light. In contrast to pure TiO 2 , H:(STO/ TiO 2 ) facilitated an efficient transfer of electrons between STO and TiO 2 , and decreased the recombination ratios of photoexcited electron−hole pairs. Plasmonic Au also effectively boosted the photoresponse under irradiation with visible light. Photocurrent density of 2.3 mA cm −2 under visible light irradiation (λ > 400 nm) with IPCE peaking at 17% and a concomitant apparent quantum efficiency of 3.5% in the 580−680 nm region was achieved. Faradaic efficiency was estimated to be about 80% at the oxygen evolution rate of 18.5 μmol cm −2 h −1 under simulated sunlight irradiation (AM1.5G, 100 mW cm −2 ). With the aid of X-ray absorption spectra in situ and ultrafast transient absorption spectra, the detailed understanding of the underlying mechanism during photoinduced processes in Au/H:(STO/TiO 2 ) is well elucidated.

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Section: Methodssupporting

confidence: 82%

Section: Resultssupporting

confidence: 71%

Synergistic Effects of Plasmonic Gold and Perovskite-Type SrTiO₃ for Enhanced Photocatalytic Performance of TiO₂ Nanotube Arrays

et al. 2021

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“…For example, BiOI/BiOCl heterojunctions with contacted facets of BiOI (001)/BiOCl (010) exhibit a higher charge injection efficiency than their counterparts with contacted facets of BiOI (001)/BiOCl (001) due to the optimized electron transfer pathway . Other faceted heterojunctions such as {001}TiO 2 /{001}SrTiO 3 epitaxial films, coaxial-nanocoupled SrTiO 3 /TiO 2 {001} nanotube arrays, − ultrathin g-C 3 N 4 nanosheets decorated Bi 2 MoO 6 nanosheet arrays with exposed {010} facets, α-Fe 2 O 3 modified TiO 2 {101} pyramids, {001}BiOI@Bi 12 O 17 Cl 2 p–n junctions, {002} dominant WO 3 /BiVO 4 junctions, and {001}BiOBr/α-Fe 2 O 3 p–n junctions also show enhanced PEC performance.…”

Section: Modification Of Faceted Photoelectrodes With Enhanced Pec Pe...mentioning

confidence: 99%

Crystal Facet Engineering of Photoelectrodes for Photoelectrochemical Water Splitting

2019

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Photoelectrochemical (PEC) water splitting is a promising approach for solar-driven hydrogen production with zero emissions, and it has been intensively studied over the past decades. However, the solar-to-hydrogen (STH) efficiencies of the current PEC systems are still far from the 10% target needed for practical application. The development of efficient photoelectrodes in PEC systems holds the key to achieving high STH efficiencies. In recent years, crystal facet engineering has emerged as an important strategy in designing efficient photoelectrodes for PEC water splitting, which has yet to be comprehensively reviewed and is the main focus of this article. After the Introduction, the second section of this review concisely introduces the mechanisms of crystal facet engineering. The subsequent section provides a snapshot of the unique facet-dependent properties of some semiconductor crystals including surface electronic structures, redox reaction sites, surface built-in electric fields, molecular adsorption, photoreaction activity, photocorrosion resistance, and electrical conductivity. Then, the methods for fabricating photoelectrodes with faceted semiconductor crystals are reviewed, with a focus on the preparation processes. In addition, the notable advantages of the crystal facet engineering of photoelectrodes in terms of light harvesting, charge separation and transfer, and surface reactions are critically discussed. This is followed by a systematic overview of the modification strategies of faceted photoelectrodes to further enhance the PEC performance. The last section summarizes the major challenges and some invigorating perspectives for future research on crystal facet engineered photoelectrodes, which are believed to play a vital role in promoting the development of this important research field.

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“…In addition, three peaks were discovered by fitting the curves. The peak at 399.5 eV (peak 1) was attributed to substitutional N for O in the form of O-Ti-N bonding, at 400.1 eV (peak 2) to the interstitial N-O bonds of the crystal lattice 37 and at 401.4 eV (peak 3) to nitrogen species bound to various surface oxygen sites (such as adsorbed NOx). 19 The atomic percentages of Ti, O, F, N and Sn in the N-TiO 2 /SnO 2 sample were approximately 30.34, 57.75, 1.87, 3.09, and 2.23 at% in the XPS measurement, respectively, which was consistent with the result obtained from EDX (Fig.…”

Section: Morphology and Structurementioning

confidence: 99%

Construction of N-doped TiO₂/SnO₂heterostructured microspheres with dominant {001} facets for enhanced photocatalytic properties

Bai

2016

CrystEngComm

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Nitrogen-doped (N-doped) TiO 2 /SnO 2 heterostructured microspheres with exposed mirror-like plane {001} facets were successfully fabricated by a conventional hydrothermal method and easy impregnation treatment. The morphology, structure and photocatalytic properties of the N-doped TiO 2 /SnO 2 heterostructure were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectroscopy, and transient photocurrent response. Characterization results indicated that in situ formed SnO 2 nanoparticles were uniformly grafted onto N-TiO 2 microspheres of ca. 2.0 μm in size. The mirror-like {001} surface of these microspheres was covered by square-shaped crystalline facets ca. 0.6 μm long. The formation of a heterojunction between SnO 2 and N-TiO 2 microspheres enhanced the separation efficiency of photogenerated electron-hole pairs and the light-harvesting capability, which significantly improved the photocatalytic performance. Furthermore, N-doped TiO 2 /SnO 2 heterostructured microspheres with highly reactive {001} facets were used as a stable photocatalyst for the highest photocatalytic activity for bisphenol A degradation under UV and visible light irradiation compared with pristine TiO 2 and N-TiO 2 . This result can be attributed to the unique structure and synergistic effect of the dominant mirror-like plane {001} facets, N doping and heterostructured interface. This study provides new possibilities for the development of TiO 2 with a dominant {001} facet-based heterostructure for environmental purification.

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N‐Doped TiO₂/SrTiO₃ Heterostructured Nanotubes for High‐Efficiency Photoelectrocatalytic Properties under Visible‐Light Irradiation

Cited by 11 publications

References 76 publications

Synergistic Effects of Plasmonic Gold and Perovskite-Type SrTiO₃ for Enhanced Photocatalytic Performance of TiO₂ Nanotube Arrays

Synergistic Effects of Plasmonic Gold and Perovskite-Type SrTiO₃ for Enhanced Photocatalytic Performance of TiO₂ Nanotube Arrays

Crystal Facet Engineering of Photoelectrodes for Photoelectrochemical Water Splitting

Construction of N-doped TiO₂/SnO₂heterostructured microspheres with dominant {001} facets for enhanced photocatalytic properties

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N‐Doped TiO2/SrTiO3 Heterostructured Nanotubes for High‐Efficiency Photoelectrocatalytic Properties under Visible‐Light Irradiation

Cited by 11 publications

References 76 publications

Synergistic Effects of Plasmonic Gold and Perovskite-Type SrTiO3 for Enhanced Photocatalytic Performance of TiO2 Nanotube Arrays

Synergistic Effects of Plasmonic Gold and Perovskite-Type SrTiO3 for Enhanced Photocatalytic Performance of TiO2 Nanotube Arrays

Crystal Facet Engineering of Photoelectrodes for Photoelectrochemical Water Splitting

Construction of N-doped TiO2/SnO2heterostructured microspheres with dominant {001} facets for enhanced photocatalytic properties

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Product

Resources

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N‐Doped TiO₂/SrTiO₃ Heterostructured Nanotubes for High‐Efficiency Photoelectrocatalytic Properties under Visible‐Light Irradiation

Synergistic Effects of Plasmonic Gold and Perovskite-Type SrTiO₃ for Enhanced Photocatalytic Performance of TiO₂ Nanotube Arrays

Synergistic Effects of Plasmonic Gold and Perovskite-Type SrTiO₃ for Enhanced Photocatalytic Performance of TiO₂ Nanotube Arrays

Construction of N-doped TiO₂/SnO₂heterostructured microspheres with dominant {001} facets for enhanced photocatalytic properties