In-situ synthesis of novel Z-scheme SnS2/BiOBr photocatalysts with superior photocatalytic efficiency under visible light

Qiu, Fazheng; Li, Wenjun; Wang, Fangzhi; Li, Hongda; Liu, Xintong; Sun, Jiayi

doi:10.1016/j.jcis.2016.12.066

Cited by 105 publications

(31 citation statements)

References 51 publications

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“…The semiconductor SnS 2 possesses the advantages of favorable stability, low toxicity, and natural abundance, which, with a suitable band gap (2.1 eV–2.43 eV) [ 26 , 27 , 28 ] has been reported for photocatalytic hydrogen production [ 29 , 30 ] and organic degradation [ 31 , 32 ]. For instance, Yu et al [ 30 ] prepared two-dimensional SnS 2 nanosheets with a thickness of ca.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional ZnS/SnS2 Heterojunction as a Direct Z-Scheme Photocatalyst for Overall Water Splitting: A DFT Study

Chen

Zhao

et al. 2022

Materials

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Direct Z-scheme photocatalysts have attracted extensive attention due to their strong redox ability and efficient separation of photogenerated electron-hole pairs. In this study, we constructed two types of ZnS/SnS2 heterojunctions with different stacking models of ZnS and SnS2 layers, and investigated their structures, stabilities, and electronic and optical properties. Both types of heterojunctions are stable and are direct Z-scheme photocatalysts with band gaps of 1.87 eV and 1.79 eV, respectively. Furthermore, their oxidation and reduction potentials straddle the redox potentials of water, which makes them suitable as photocatalysts for water splitting. The built-in electric field at the heterojunction interface improves the separation of photogenerated electron-hole pairs, thus enhancing their photocatalytic efficiency. In addition, ZnS/SnS2 heterojunctions have higher carrier mobilities and light absorption intensities than ZnS and SnS2 monolayers. Therefore, the ZnS/SnS2 heterojunction has a broad application prospect as a direct Z-scheme visible-light-driven photocatalyst for overall water splitting.

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Section: Introductionmentioning

confidence: 99%

Two-Dimensional ZnS/SnS2 Heterojunction as a Direct Z-Scheme Photocatalyst for Overall Water Splitting: A DFT Study

Chen

Zhao

et al. 2022

Materials

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“…However, BiOBr exhibit poor ability to capture visible light and high recombination rate of photogenerated carriers, which makes its photocatalytic efficiency still very low, and is far from being sufficient for practical applications under sunlight [7] . Therefore, researchers have used a variety of methods to combine other semiconductor photocatalysts with BiOBr to improve photocatalytic performance, such as BiOBr/g‐C 3 N 4 , [8] SnS 2 /BiOBr, [9] BiOI/BiOBr, [10] BiOBr/WO 3 [11] and CdWO 4 /BiOBr [12] etc. After construction of the composite material, not only the light absorption ability in the visible light region is enhanced, but the recombination rate of photo‐generated carriers is also greatly lower, thus exhibiting stronger photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

In‐Situ Synthesis of MoS₂/BiOBr Material via Mechanical Ball Milling for Boosted Photocatalytic Degradation Pollutants Performance

et al. 2021

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A novel visible‐light‐driven MoS2/BiOBr composite material is prepared in situ under normal temperature and pressure conditions through the efficient, green and energy‐saving ionic liquid‐assisted mechanical ball milling method. Under visible light irradiation, the MoS2/BiOBr composite exhibits enhanced photocatalytic degradation tetracycline (TC) activity than that of BiOBr monomer. Among them, 1.0 wt % MoS2/BiOBr exhibits the best photocatalytic degradation activity and can degrade 68 % of TC within 120 min, which is 30 % improvement in performance compared to BiOBr monomer. The introduction of MoS2 promotes the photocatalytic performance of the composite material, which is mainly attributed to the increased specific surface area, enhanced visible light absorption capacity and excellent photo‐generated carrier separation and transfer efficiency. Electron spin resonance, radical trapping experiments and XPS valence band spectroscopy confirmed that superoxide radicals and holes are the main active species in the photocatalytic process.

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“…However, the photogenerated electrons and holes of SnS 2 composites can severely limit the photocatalytic performance because the recombination of photogenerated electrons and holes exists in the surface and interior of SnS 2 photocatalysts [3,4]. Consequently, many researchers have been devoted to improve the separation of photogenerated charges of SnS 2 -layered material by forming heterojunctions with other semiconductor photocatalysts, such as g-C 3 N 4 [5], ZnS [6], Bi 2 S 3 [7], SnS [8], CdS [9], Al 2 O 3 [10], SnO 2 [11], MgFe 2 O 4 [12], LaTi 2 O 7 [13], BiOBr [14], and BiOCl [15].…”

Section: Introductionmentioning

confidence: 99%

Ag2S Quantum Dots Based on Flower-like SnS2 as Matrix and Enhanced Photocatalytic Degradation

Zhao

Wei

et al. 2019

Materials

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Ag2S quantum dots were dispersed on the surface of SnS2 nanoflowers forming a heterojunction via in-situ ion exchange to improve photocatalytic degradation of RhB. All samples exhibit the hexagonal wurtzite structure. The size of Ag2S@SnS2 composites are ~ 1.5 μm flower-like with good crystallinity. Meanwhile, the Eg of 3% Ag2S@SnS2 is close to that of pure SnS2. Consequently, the 3% Ag2S@SnS2 composite displays the excellent photocatalytic performance under simulated sunlight irradiation with good cycling stability, compared to the pure SnS2 and other composites. Due to the blue and yellow luminescence quenching, the photogenerated electrons and holes is effectively separated in the 3% Ag2S@SnS2 sample. Especially, the hydroxyl radicals and photogenerated holes are main active species.

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In-situ synthesis of novel Z-scheme SnS2/BiOBr photocatalysts with superior photocatalytic efficiency under visible light

Cited by 105 publications

References 51 publications

Two-Dimensional ZnS/SnS2 Heterojunction as a Direct Z-Scheme Photocatalyst for Overall Water Splitting: A DFT Study

Two-Dimensional ZnS/SnS2 Heterojunction as a Direct Z-Scheme Photocatalyst for Overall Water Splitting: A DFT Study

In‐Situ Synthesis of MoS₂/BiOBr Material via Mechanical Ball Milling for Boosted Photocatalytic Degradation Pollutants Performance

Ag2S Quantum Dots Based on Flower-like SnS2 as Matrix and Enhanced Photocatalytic Degradation

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In-situ synthesis of novel Z-scheme SnS2/BiOBr photocatalysts with superior photocatalytic efficiency under visible light

Cited by 105 publications

References 51 publications

Two-Dimensional ZnS/SnS2 Heterojunction as a Direct Z-Scheme Photocatalyst for Overall Water Splitting: A DFT Study

Two-Dimensional ZnS/SnS2 Heterojunction as a Direct Z-Scheme Photocatalyst for Overall Water Splitting: A DFT Study

In‐Situ Synthesis of MoS2/BiOBr Material via Mechanical Ball Milling for Boosted Photocatalytic Degradation Pollutants Performance

Ag2S Quantum Dots Based on Flower-like SnS2 as Matrix and Enhanced Photocatalytic Degradation

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In‐Situ Synthesis of MoS₂/BiOBr Material via Mechanical Ball Milling for Boosted Photocatalytic Degradation Pollutants Performance