Plasmonic Au nanoparticles embedding enhances the activity and stability of CdS for photocatalytic hydrogen evolution

Yu, Guiyang; Wang, Xiang; Cao, Jungang; Wu, Shujie; Liu, Gang

doi:10.1039/c5cc10066f

Cited by 82 publications

(30 citation statements)

References 45 publications

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“…UV‐vis diffuse reflectance spectra (DRS) of pure CNSs and Au‐CNSs were conducted to investigate the enhanced optical performance of the photocatalysts. All CNSs and Au‐CNSs show an absorption edge at around 550 nm, and the increased absorption intensity in the visible light region from 550 to 800 nm of 0.5% Au‐CNSs, 1.0% Au‐CNSs and 3.0% Au‐CNSs can be attributed to the LSPR effect of Au QDs ( Figure a) . Such distinct difference in absorption property is consistent with the optical images of CNSs and Au‐CNSs, in which the color of Au‐CNSs gradually turns from saffron yellow to dark yellow with increasing of the Au mass loading (Figure a inset).…”

Section: Resultssupporting

confidence: 80%

“…On the contrary, Au‐CNSs (especially 0.5% Au‐CNSs) exhibit much lower emission intensity in comparison to that of CNSs, indicating that the energy‐wasteful recombination of charge carriers occurring in Au‐CNSs is greatly suppressed. The weakening of emission intensity can be attributed to the introduction of Au QDs that not only improves the separation efficiency but also restrains the recombination rate of photoinduced electron‐hole pairs . More specifically, CNSs with rough surface can establish compact adhesion with Au QDs, and these loaded Au QDs serve as an efficient electron transmission medium for photoinduced electrons.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, noble metal/semiconductor hybrid photocatalysts have attracted tremendous research interest, which exhibit largely enhanced photocatalytic efficiency beyond sole semiconductors . The photoinduced electrons in the conduction band of semiconductor can transfer to the adjacent noble metals (e.g., Au, Ag, Pt) due to their lower Fermi energy level, and the latter act as electron sinks because of the Schottky barrier at the metal/semiconductor interface .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Embedding Au Quantum Dots in Rimous Cadmium Sulfide Nanospheres for Enhanced Photocatalytic Hydrogen Evolution

Kuang

Zheng

Liu

et al. 2016

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187

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Rational design and development of new-generation photocatalysts with high hydrogen evolution activity is recognized as an effective strategy to settle energy crisis. To this regard, hybrid photocatalysts of Au quantum dots embedded in rimous cadmium sulfide nanospheres are synthesized by using a simple hydrothermal process followed by photoreduction. The rimous cadmium sulfide nanospheres with rough surface and irregular fissures greatly strengthen their adhesion and interaction with Au quantum dots, which effectively facilitates the separation, restrains the recombination, and accelerates the consumption of photoinduced electron-hole pairs. Impressively, the highest photocatalytic activity for hydrogen generation (601.2 μmol h g ) and organic pollutant degradation (100% degradation in 80 min) is obtained by adjusting the Au mass loading to achieve uniform distribution. This work paves new way to the exploitation of highly efficient metal/semiconductor hybrid photocatalysts for clean energy generation and environment restoration.

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Embedding Au Quantum Dots in Rimous Cadmium Sulfide Nanospheres for Enhanced Photocatalytic Hydrogen Evolution

Kuang

Zheng

Liu

et al. 2016

Small

187

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“…Absorption‐spectrum overlap between the plasmonic metal and the semiconductor needs to be carefully controlled to optimize the PRET process . Ag/g‐C 3 N 4 , Ag/N‐TiO 2 , and Au/CdS were all found to be reasonable combinations for plasmon‐mediated photocatalytic hydrogen evolution . However, PRET enhancements using these systems were modest and the introduction of nonconductive interlayers (SiO 2 films, organic molecules, etc.)…”

mentioning

confidence: 99%

Self‐Assembled Au/CdSe Nanocrystal Clusters for Plasmon‐Mediated Photocatalytic Hydrogen Evolution

et al. 2017

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Plasmon-mediated photocatalytic systems generally suffer from poor efficiency due to weak absorption overlap and thus limited energy transfer between the plasmonic metal and the semiconductor. Herein, a near-ideal plasmon-mediated photocatalyst system is developed. Au/CdSe nanocrystal clusters (NCs) are successfully fabricated through a facile emulsion-based self-assembly approach, containing Au nanoparticles (NPs) of size 2.8, 4.6, 7.2, or 9.0 nm and CdSe quantum dots (QDs) of size ≈3.3 nm. Under visible-light irradiation, the Au/CdSe NCs with 7.2 nm Au NPs afford very stable operation and a remarkable H -evolution rate of 73 mmol gCdSe-1 h-1 (10× higher than bare CdSe NCs). Plasmon resonance energy transfer from the Au NPs to the CdSe QDs, which enhances charge-carrier generation in the semiconductor and suppresses bulk recombination, is responsible for the outstanding photocatalytic performance. The approach used here to fabricate the Au/CdSe NCs is suitable for the construction of other plasmon-mediated photocatalysts.

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“…To solve this inherent issue, CdS doped noble metals/metal oxides have been investigated, yielding a variety of hybrid nanophotocatalysts including Au‐embedded CdS, MoS 2 /CdS, amorphous Ti(IV), Ni(II) codoped Cd, etc. Up to now, enhanced photostability can be achieved by diverse modification.…”

Section: Introductionmentioning

confidence: 99%

Encapsulated Cadmium Sulfide in Silicon Dioxide Porous Shells for Enhanced Photocatalytic Sustainability and Commendable Protection of Organic Carriers

Zhao

Tian

Shi

et al. 2019

Adv Materials Inter

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photocatalysts including Bi-based photocatalysts, [1] Co-based photocatalysts, [2] carbon nitride (C 3 N 4 ), [3] cadmium selenide (CdSe), and cadmium sulfide (CdS) [4] have been developed for utilizing sunlight efficiently. Among them, one of the most representative photocatalysts is CdS, which possesses high photosensitivity and excellent photocatalytic performance owing to its relatively narrow bandgap (E g = 2.2 eV) and appropriate band structure posi-

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Plasmonic Au nanoparticles embedding enhances the activity and stability of CdS for photocatalytic hydrogen evolution

Cited by 82 publications

References 45 publications

Embedding Au Quantum Dots in Rimous Cadmium Sulfide Nanospheres for Enhanced Photocatalytic Hydrogen Evolution

Embedding Au Quantum Dots in Rimous Cadmium Sulfide Nanospheres for Enhanced Photocatalytic Hydrogen Evolution

Self‐Assembled Au/CdSe Nanocrystal Clusters for Plasmon‐Mediated Photocatalytic Hydrogen Evolution

Encapsulated Cadmium Sulfide in Silicon Dioxide Porous Shells for Enhanced Photocatalytic Sustainability and Commendable Protection of Organic Carriers

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