Highly Visible-Light-Photoactive Heterojunction Based on TiO2 Nanotubes Decorated by Pt Nanoparticles and Bi2S3 Quantum Dots

Mazierski, Paweł; Nowaczyk, Grzegorz; Lisowski, Wojciech; Winiarski, Michał J.; Klimczuk, Tomasz; Kobylański, Marek P.; Jurga, Stefan; Zaleska-Medynska, Adriana

doi:10.1021/acs.jpcc.7b03895

Cited by 31 publications

(19 citation statements)

References 58 publications

(77 reference statements)

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“…The XPS spectrum of Ti 2p (Figure 2b) presents two peaks at 464.3 eV (Ti 4+ 2p 1/2 ) and 458.6 eV (Ti 4+ 2p 3/2 ). [ 55 ] Figure 2c exhibits one peak at 529.8 eV, which can be assigned to the O 1s. [ 56 ] The XPS spectrum of Cd 3d (Figure 2d) displays the peaks at 411.7 and 405.2 eV that can be matched to the Cd 2+ 3d 3/2 and Cd 2+ 3d 5/2 , respectively.…”

Section: Resultsmentioning

confidence: 99%

A High Catalytic Activity Photocatalysts Based on Porous Metal Sulfides/TiO₂ Heterostructures

Qian

Wang

et al. 2020

Adv Materials Inter

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Porous metal sulfides/TiO2 (P‐MST) photocatalysts are successfully prepared via a low‐cost strategy. It is found that the P‐MST possesses a high crystallinity with average pore size of ≈500 nm, which greatly enhances the structural stability as well as catalytic activity. The catalytic properties of the P‐MST are examined by monitoring the degradation of rhodamine B (RhB) under visible‐light irradiation. Particularly, the optimized 7% Bi2S3–CdS–MoS2–TiO2 heterostructures exhibit a remarkable catalytic performance (i.e., the degradation of RhB of ≈98.9%) and long‐term cyclic stability (i.e., the catalytic activity of ≈91.7% even after 30 cyclic test), compared with that of other P‐MST heterostructures. The exceptional catalytic performance may be ascribed to the following benefits: i) the porous structure supplies ample carrier charge transfer channels and lots of surface reaction sites; and ii) the suitable amount of metal sulfides grown on TiO2 have contributed to significant improvement of the electrical conductivity and the light absorption capability.

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Section: Resultsmentioning

confidence: 99%

A High Catalytic Activity Photocatalysts Based on Porous Metal Sulfides/TiO₂ Heterostructures

Qian

Wang

et al. 2020

Adv Materials Inter

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“…Figure 5 shows the X-ray diffraction (XRD) patterns of pristine TiO2, QDs and TiO2/QDs_15 composites. The peak diffraction observed at the 2θ values of 25, 37.8, 48.1, and 53.9° can be assigned to (101), (004), (200), and (105) crystallographic plane of anatase TiO2 with tetragonal crystal structure [31,43]. Three peaks at 2θ values of 26.5, 44.7, and 52.3° corresponding to the (112), (220), and (312) indices of the tetragonal crystal structure of AgInS2 QDs, respectively ( Figure 5a) [44].…”

Section: Photoluminescence Propertiesmentioning

confidence: 93%

The Effect of AgInS2, SnS, CuS2, Bi2S3 Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO2 Composite

et al. 2020

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The effect of type (AgInS 2 , SnS, CuS 2 , Bi 2 S 3 ) and amount (5, 10, 15 wt%) of quantum dots (QDs) on the surface properties and photocatalytic activity of QDs-sensitized TiO 2 composite, was investigated. AgInS 2 , SnS, CuS 2 , Bi 2 S 3 QDs were obtained by hot-injection, sonochemical, microwave, and hot-injection method, respectively. To characterize of as-prepared samples high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Vis spectroscopy and photoluminescence (PL) emission spectroscopy were applied. The size of AgInS 2 , SnS, CuS 2 , Bi 2 S 3 QDs were 12; 2-6; 2-3, and 1-2 nm, respectively. The QDs and QDs-sensitized TiO 2 composites obtained have been tested in toluene degradation under LEDs light irradiation (λ max = 415 nm and λ max = 375 nm). For pristine QDs the efficiency of toluene degradation increased in the order of AgInS 2 < Bi 2 S 3 < CuS < SnS under 375 nm and AgInS 2 < CuS < Bi 2 S 3 < SnS under 415 nm. In the presence of TiO 2 /SnS QDs_15% composite, 91% of toluene was degraded after 1 h of irradiation, and this efficiency was about 12 higher than that for pristine QDs under 375 nm. Generally, building the TiO 2 /AgInS 2 and TiO 2 /SnS exhibited higher photoactivity under 375 nm than the pristine TiO 2 and QDs which suggests a synergistic effect between QDs and TiO 2 matrix. Catalysts 2020, 10, 403 2 of 18 application of metal sulfides (M x S y ) for wide band semiconductors modification, because of their high charge separation efficiency and narrow band gaps, which possibly enable light harvesting at longer wavelengths [9]. Liu et al. studied the efficiency of AgInS 2 /TiO 2 heterostructures in 1,2-dichlorobenzene (o-DCB) degradation under visible light [10]. They observed that AgInS 2 /TiO 2 composites could expand the visible-light response range and greatly decreased the recombination of photogenerated electron−hole pairs in the composites. The degradation of o-DCB for the most active sample reaches about 50% after 8h of irradiation. Jang et al. prepared Ag-SnS-TiO 2 nanocomposite for methylene blue and rhodamine B degradation under simulated sunlight [11].The photoactivity of the produced photocatalysts was about 2-3 times higher than that of P25. Compared with bare TiO 2 the CuS/TiO 2 [12], CdS/TiO 2 [13-15], SnS/TiO 2 [16], Ag 2 S/TiO 2 [17,18], CuInS 2 /TiO 2 [19-21], Bi 2 S 3 /TiO 2 [22][23][24] nanocomposites present a significant improvement on photocatalytic reactions due to the decreasing recombination of electron-hole pairs and the broadened light absorption spectra. However, the metal sulfides commonly employed for TiO 2 modification have been used in nanoparticle sizes and not in quantum dots sizes. Further, it has been shown that the size of metal sulfides (MS) particles can have an impact on its physicochemical and optical properties. Recently, the literature data demonstrated that the decrease in particle size lowers the recombination of the electron-hole pair within the semiconductor particle. Quantum...

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“…[1][2][3] Photocatalysts based on TiO 2 , ZnO are inactive under visible light irradiation due to their wide bandgap energy and improper band position, which requires ultraviolet irradiation that only accounts for less than 5% of the solar energy. [4][5][6] And the main reason for their poor photocatalytic activity might be due to the strong recombination of photogenerated electronhole (e À -h + ) pairs, which is a widespread phenomenon among semiconductor photocatalysts. Therefore, it is still challenging to extend the photo-response range and improve the charge separation efficiency of the semiconductor photocatalysts for satisfying the requirements of applications.…”

Section: Instructionmentioning

confidence: 99%

Enhanced visible-light photocatalytic activity and photostability of Ag₃PO₄/Bi₂WO₆ heterostructures toward organic pollutant degradation and plasmonic Z-scheme mechanism

Yang

Wang

et al. 2018

RSC Adv.

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Highly Visible-Light-Photoactive Heterojunction Based on TiO₂ Nanotubes Decorated by Pt Nanoparticles and Bi₂S₃ Quantum Dots

Cited by 31 publications

References 58 publications

A High Catalytic Activity Photocatalysts Based on Porous Metal Sulfides/TiO₂ Heterostructures

A High Catalytic Activity Photocatalysts Based on Porous Metal Sulfides/TiO₂ Heterostructures

The Effect of AgInS2, SnS, CuS2, Bi2S3 Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO2 Composite

Enhanced visible-light photocatalytic activity and photostability of Ag₃PO₄/Bi₂WO₆ heterostructures toward organic pollutant degradation and plasmonic Z-scheme mechanism

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Highly Visible-Light-Photoactive Heterojunction Based on TiO2 Nanotubes Decorated by Pt Nanoparticles and Bi2S3 Quantum Dots

Cited by 31 publications

References 58 publications

A High Catalytic Activity Photocatalysts Based on Porous Metal Sulfides/TiO2 Heterostructures

A High Catalytic Activity Photocatalysts Based on Porous Metal Sulfides/TiO2 Heterostructures

The Effect of AgInS2, SnS, CuS2, Bi2S3 Quantum Dots on the Surface Properties and Photocatalytic Activity of QDs-Sensitized TiO2 Composite

Enhanced visible-light photocatalytic activity and photostability of Ag3PO4/Bi2WO6 heterostructures toward organic pollutant degradation and plasmonic Z-scheme mechanism

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Highly Visible-Light-Photoactive Heterojunction Based on TiO₂ Nanotubes Decorated by Pt Nanoparticles and Bi₂S₃ Quantum Dots

A High Catalytic Activity Photocatalysts Based on Porous Metal Sulfides/TiO₂ Heterostructures

A High Catalytic Activity Photocatalysts Based on Porous Metal Sulfides/TiO₂ Heterostructures

Enhanced visible-light photocatalytic activity and photostability of Ag₃PO₄/Bi₂WO₆ heterostructures toward organic pollutant degradation and plasmonic Z-scheme mechanism