Novel Ag2S/ZnS/carbon nanofiber ternary nanocomposite for highly efficient photocatalytic hydrogen production

Yue, Shijing; Wei, Bowen; Yang, Shuangxia; Wang, Lianying; He, Jing

doi:10.1016/j.catcom.2015.12.020

Cited by 21 publications

(6 citation statements)

References 21 publications

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“…Similarly, Yue et al fabricated a novel Ag2S/ZnS/carbon nanofiber ternary composite to increase the hydrogen production rate well above that of the reported ZnS composite photocatalyst. In addition, the synergetic effect of Ag2S and CNF is also important for inhibiting the recombination of charge carriers [33]. Moreover, nanosheets of ZnS:Ag2S also exhibit a trend of enhancement similar to that of the above mentioned nanostructure.…”

Section: Cadmium Sulfidementioning

confidence: 86%

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Lee

Chang

2019

Catalysts

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Metal sulfide-based photocatalysts have gained much attention due to their outstanding photocatalytic properties. This review paper discusses recent developments on metal sulfide-based nanomaterials for H2 production, acting as either photocatalysts or cocatalysts, especially in the last decade. Recent progress on key experimental parameters, in-situ characterization methods, and the performance of the metal sulfide photocatalysts are systematically discussed, including the forms of heterogeneous composite photocatalysts, immobilized photocatalysts, and magnetically separable photocatalysts. Some methods have been studied to solve the problem of rapid recombination of photoinduced carriers. The electronic density of photocatalysts can be investigated by in-situ C K-edge near edge X-ray absorption fine structure (NEXAFS) spectra to study the mechanism of the photocatalytic process. The effects of crystal properties, nanostructure, cocatalyst, sacrificial agent, electrically conductive materials, doping, calcination, crystal size, and pH on the performance of composite photocatalysts are presented. Moreover, the facet effect and light trapping (or light harvesting) effect, which can improve the photocatalytic activity, are also discussed.

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Section: Cadmium Sulfidementioning

confidence: 86%

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Lee

Chang

2019

Catalysts

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“…14 The Ag 2 S-coupled ZnS-carbon nanocomposites greatly suppress the charge recombination under irradiation, thus resulting in high photocatalytic H 2 production activity. 15 The aforementioned works support the combination of ZnS with visible light sulfide sensitizers, can improve the transport efficiency of photogenerated carriers, and extend the spectral response range. Thus, the photocatalytic application and efficiency of ZnS are improved.…”

Section: Introductionmentioning

confidence: 91%

Ag sputtering–assisted phase formation of Ag₂S‐decorated ZnS composite sheets and their photoactive performances

Liang

Huang

2022

J Am Ceram Soc.

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The Ag 2 S crystallites-decorated ZnS composite sheets were synthesized by combinational methodology. Two types of ZnS sheet templates were obtained through the vulcanization of ZnO sheets with sulfur precursors of thiourea and Na 2 S, and then ZnS-Ag 2 S heterogeneous sheets were obtained with sputtering Ag crystallites and post-annealing procedures. The ZnS sheets have rugged and smooth surfaces formed with sulfur precursors of thiourea and Na 2 S, respectively. Both the initial microstructures of ZnS sheet templates and Ag 2 S decoration content affect the photoactivity of the ZnS-Ag 2 S composite sheets. Compared with the pristine ZnS, the ZnS-Ag 2 S composite sheets with a suitable Ag 2 S loading content (Ag at% = 3.6-3.8) are beneficial to improve the photoactivity, which could be explained by the combination of narrow bandgap; Ag 2 S crystallites would enhance photon absorption and separation efficiency of photoinduced charge carriers. The scavenger tests and photodegradation mechanism show that hydroxyl radicals and holes were the main active species for the ZnS-Ag 2 S composite sheets to photodegrade methyl orange solution. The experimental results herein provide a novel synthesis approach to decorate Ag 2 S crystallites onto ZnS with tunable contents and present important design guidelines for the resultant ZnS-Ag 2 S composite sheets to demonstrate marked improvement in photoactivity.

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“…12–14 Among various materials, Ag 2 S nanoparticles with a reasonable bandgap (∼1.1 eV) represent a preeminent candidate with ultralow solubility ( K sp (Ag 2 S) = 6.3 × 10 −50 ), low toxicity, and broad light-absorption from the ultraviolet (UV) to near-infrared (NIR) region. 30 Many Ag 2 S-based photocatalysts, such as ZnS/CdS/Ag 2 S, 31 Ag 2 S/Ag 3 PO 4 , 27 rGO/Ag 2 S/TiO 2 , 32 and Ag 2 S/ZnS/carbon nanofiber, 33 have been used for the photocatalytic degradation of organic pollutants. Furthermore, the use of Ag 2 S quantum dots (QDs) as a co-catalyst to assist photo-induced electron transfer is beneficial for enhancing the H 2 -evolving activity.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the use of Ag 2 S quantum dots (QDs) as a co-catalyst to assist photo-induced electron transfer is beneficial for enhancing the H 2 -evolving activity. 30,33–35 More recently, Jing et al highlighted the potential photocatalytic and photoelectrochemical applications of novel Ag 2 S QD modified three-dimensional flower-like SnS 2 composites. 36 In view of the above, it can be conjectured that the photogenerated electrons in the conduction band (CB) of SnS 2 can inject into the Ag 2 S materials to initiate the photocatalytic CO 2 reduction reactions by coupling SnS 2 with narrow-bandgap Ag 2 S to form a nanohybrid heterojunction.…”

Section: Introductionmentioning

confidence: 99%

In situ growth of Ag₂S quantum dots on SnS₂ nanosheets with enhanced charge separation efficiency and CO₂ reduction performance

et al. 2022

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Novel Ag2S/ZnS/carbon nanofiber ternary nanocomposite for highly efficient photocatalytic hydrogen production

Cited by 21 publications

References 21 publications

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Ag sputtering–assisted phase formation of Ag₂S‐decorated ZnS composite sheets and their photoactive performances

In situ growth of Ag₂S quantum dots on SnS₂ nanosheets with enhanced charge separation efficiency and CO₂ reduction performance

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Novel Ag2S/ZnS/carbon nanofiber ternary nanocomposite for highly efficient photocatalytic hydrogen production

Cited by 21 publications

References 21 publications

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Ag sputtering–assisted phase formation of Ag2S‐decorated ZnS composite sheets and their photoactive performances

In situ growth of Ag2S quantum dots on SnS2 nanosheets with enhanced charge separation efficiency and CO2 reduction performance

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Ag sputtering–assisted phase formation of Ag₂S‐decorated ZnS composite sheets and their photoactive performances

In situ growth of Ag₂S quantum dots on SnS₂ nanosheets with enhanced charge separation efficiency and CO₂ reduction performance