A novel high-photoactivity quaternary ZnSn(OH)6–graphene composite evolved from a 3D multilayer structure via a facile and green proton-mediated self-assembly method

Feng, Wenhui; Pei, Zengxia; Fang, Zhibin; Huang, Ming-Hui; Lu, Meiliang; Weng, Sunxian; Zheng, Zuyang; Hu, Jiang; Liu, P.

doi:10.1039/c3ta15022d

Cited by 21 publications

(9 citation statements)

References 62 publications

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“…As a functional material, ZHS shows excellent photo, electrical, gas sensing and flame-retardant properties, being cheap, safe, non-toxic, low cost and highly sensitive [3,4]. Compared with TiO 2 , BiVO 4 , Cu 2 O, CdS, TiO 2 and TaOH [5], ZHS has a large bandgap, with +2.9 V of valence band (VB) and −0.76 V of conduction band (CB), which explains its high redox potential [6,7]. Moreover, ZHS has a strong covalent Zn-Sn bond that allows charge transfer.…”

Section: Introductionmentioning

confidence: 99%

Creation of an internal electric field in SnO2@ZnS-ZnSn(OH)6 dual-type-II heterojunctions for efficient NO photo-oxidation

Chen

Ouyang

et al. 2023

Sci. China Mater.

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Well-designed heterojunction photocatalysts are promising high-performance materials, effective in inducing charge transfer to achieve a particular migration path and long-lasting carriers. However, the traditional binary heterojunction photocatalysts still show low-efficiency charge separation. Herein, we report a direct dual-type-II SnO 2 @ZnS-ZHS (ZHS = ZnSn(OH) 6 ) ternary heterojunction, obtained by a facile in-situ face-to-face growth approach. Experimental results and density functional theory calculations reveal that the carrier dynamics of SnO 2 @ZnS-ZHS, with dual-type-II mechanisms, enables the photogenerated holes (h + ) of SnO 2 to migrate to the valence bands of ZHS and ZnS. This ensures that SnO 2 @ZnS-ZHS has twice as much oxidizing potential to produce enough hydroxyl radicals (•OH) to participate in NO oxidation reactions. With a unique dual-type-II ternary structure, SnO 2 @ZnS-ZHS shows the highest NO removal rate (44.5%) after 30 min, which is 23.5, 29.7 and 15.9 times higher than the values shown by the single components ZHS, SnO 2 and ZnS, respectively. A reaction mechanism is proposed. The improved photocatalytic activity shows the advantages of the SnO 2 @ZnS-ZHS heterostructure as a promising candidate for ternary heterojunction design.

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Section: Introductionmentioning

confidence: 99%

Creation of an internal electric field in SnO2@ZnS-ZnSn(OH)6 dual-type-II heterojunctions for efficient NO photo-oxidation

Chen

Ouyang

et al. 2023

Sci. China Mater.

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“…2,3 In particular, graphene-based photocatalysts generally show remarkably enhanced photocatalytic performance due to the accelerated transfer and promoted separation of photo-generated carriers by graphene. [9][10][11] However, pristine graphene is a zero bandgap material and does not show any photocatalytic activity, serving just as an electron acceptor or transport intermediate in a photocatalytic reaction. 2,12 In addition, excess graphene blocks incident light and hampers the external quantum efficiency of a photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Constructing atomic layer g-C₃N₄–CdS nanoheterojunctions with efficiently enhanced visible light photocatalytic activity

Pei

Weng

et al. 2014

Phys. Chem. Chem. Phys.

156

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Ultrathin two dimensional (2D) materials have triggered extensive interest for their exceptional properties and potential applications. Herein, atomic layer graphitic carbon nitride (g-C3N4) was obtained by a simple ultrasonic exfoliation approach, and cadmium sulfide (CdS) nanoparticles were successfully grown on these ultrathin g-C3N4 nanosheets (UCNNS) via a facile solvothermal method. The as-prepared UCNNS-CdS nanocomposite exhibits significantly enhanced photocatalytic activity for methyl orange (MO) degradation under visible light irradiation. The enhancement of the photocatalytic activity should be attributed to the well-matched band structure and intimate contact interfaces between the UCNNS and CdS, which lead to the effective transfer and separation of the photogenerated charge carriers. The mechanism for the photodegradation of MO by the composite was also investigated in this study. This study highlights the potential applications of atomic layer g-C3N4 based photocatalysts, and we hope our work may provide a new insight for the construction of photocatalysts with efficient visible light activity.

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“…Considering of the non-toxicity and safety properties, ZSH has been widely utilized in highly effective ame retardants, smoke inhibitor, inorganic ller, gassensing material and photodegradation of organic pollutants. [16][17][18][19] As a kind of perovskite-structured hydroxide, the surface of ZSH is full of OH groups which can accept photogenerated holes to form hydroxyl radicals (OH), and the forming OH played a vital role in photocatalytic reactions. 20 In recent years, ZSH had been applied successively in the photodegradation of organic pollutions.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic photocatalyst Ag@AgCl/ZnSn(OH)₆: synthesis, characterization and enhanced visible-light photocatalytic activity in the decomposition of dyes and phenol

et al. 2015

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23 An efficient visible-light-driven photocatalyst Ag@AgCl/ZnSn(OH) 6 24 (Ag@AgCl/ZSH) was successfully fabricated by an ultrasonic assistant 25 precipitation-photoreduction method at room temperature. The photophysical 26 42 nanoparticles and high separation of photogenerated electron-hole pairs in the 43 photocatalytic process, leading to the low recombination rates of the photoinduced 44 3 electron-hole pairs. High degradation efficiencies and physicochemical features were 45 maintained after five recycling experiments, indicating that the photocatalysts were 46 relatively durable and stable. It is expected that the plasmonic photocatalyst 47 Ag@AgCl/ZSH is a promising candidate material for the photodegradation of organic 48 pollutants in wastewater. 49 5 benzene under UV irradiation. 21 Chen et al. prepared ZSH nanoparticles by 92 homogeneous precipitation (HP) and hydrothermal (HT) method, which showed much 93 superior photocatalytic activities in the degradation of methyl orange and benzene 94 compared with pure TiO 2 under UV irradiation. 16 In addition, for accelerating the 95 separation of charge carriers and reducing the recombination of electron-hole pairs, Li 96 and his co-workers had successfully established the heterojunction structure between 97 ZSH and BiOI, which expanded the optical response to the visible region and the 98 absorption edge shifted to longer wavelengths. 22 Superficially, the aforementioned 99 modified ZSH have achieved efficient photocatalytic activities to some extent, but 100 most of improved photocatalytic performance is restricted in UV light region. In order 101 to make better use of the inexpensive, earth-abundant solar energy, it is imperative to 102 develop more efficient modified method to solve the drawbacks of single-component 103 photocatalyst ZSH and improve the separation of photo-generated electron-hole pairs 104 in the photocatalysis process. 105 Up to now, a large number of visible-light-driven (VLD) photocatalysts have 106 been developed combining with the strategy of surface plasmon resonance (SPR), 107 which can be realized through the collect oscillation of free electrons on the surface of 108 noble-metal nanoparticles ( such as Au, Ag and Pt). It is generally recognized that 109 noble metal nanoparticles (NPs) had broadened the absorption in the visible-light 110 region attributing to the SPR structure, further to improve the photocatalytic 111 performance in degradation of organic pollutants. 23, 24 In particular, the silver/silver 112 halides (denoted as Ag/AgX, X = Cl, Br, I) have gained considerable attention in both 113 scientific and engineering field and have been considered as an alternative attractive 114 visible-light-driven photocatalyts, as a consequence of their outstanding 115 photocatalytic performances in the decomposition of organic pollutants, 25, 26 water 116 157 the mixture was cooled down to room temperature naturally, the resulting white 158 precipitate was collected by filtering and washing with deionized water and ethanol 159 for se...

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A novel high-photoactivity quaternary ZnSn(OH)6–graphene composite evolved from a 3D multilayer structure via a facile and green proton-mediated self-assembly method

Cited by 21 publications

References 62 publications

Creation of an internal electric field in SnO2@ZnS-ZnSn(OH)6 dual-type-II heterojunctions for efficient NO photo-oxidation

Creation of an internal electric field in SnO2@ZnS-ZnSn(OH)6 dual-type-II heterojunctions for efficient NO photo-oxidation

Constructing atomic layer g-C₃N₄–CdS nanoheterojunctions with efficiently enhanced visible light photocatalytic activity

Plasmonic photocatalyst Ag@AgCl/ZnSn(OH)₆: synthesis, characterization and enhanced visible-light photocatalytic activity in the decomposition of dyes and phenol

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A novel high-photoactivity quaternary ZnSn(OH)6–graphene composite evolved from a 3D multilayer structure via a facile and green proton-mediated self-assembly method

Cited by 21 publications

References 62 publications

Creation of an internal electric field in SnO2@ZnS-ZnSn(OH)6 dual-type-II heterojunctions for efficient NO photo-oxidation

Creation of an internal electric field in SnO2@ZnS-ZnSn(OH)6 dual-type-II heterojunctions for efficient NO photo-oxidation

Constructing atomic layer g-C3N4–CdS nanoheterojunctions with efficiently enhanced visible light photocatalytic activity

Plasmonic photocatalyst Ag@AgCl/ZnSn(OH)6: synthesis, characterization and enhanced visible-light photocatalytic activity in the decomposition of dyes and phenol

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Constructing atomic layer g-C₃N₄–CdS nanoheterojunctions with efficiently enhanced visible light photocatalytic activity

Plasmonic photocatalyst Ag@AgCl/ZnSn(OH)₆: synthesis, characterization and enhanced visible-light photocatalytic activity in the decomposition of dyes and phenol