New insight of Ag quantum dots with the improved molecular oxygen activation ability for photocatalytic applications

Di, Jun; Xia, Jiexiang; Ji, Mengxia; Wang, Bin; Huang, Yan; Chen, Zhigang

doi:10.1016/j.apcatb.2016.01.062

Cited by 143 publications

(35 citation statements)

References 62 publications

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“…A suitable amount of Ag deposits facilitates the migration and transfer of excited electrons from the conduction band of semiconductor to metallic sites through the Schottky barrier generated at the metal-semiconductor interface. However, an excessive content of silver species acts as recombination centers for the photoinduced electron-hole pairs or cover active sites on surface to hinder the accessibility and incoming visible light, thus diminishing the photocatalytic degradation efficiency [18,19]. Thirdly, the LSPR effect of metallic Ag species excited by the absorption of visible light with specific frequency would promote the surface electron excitation and interfacial electron transfer, and thus be propitious to the enhanced photocatalytic efficiency [5,36].…”

Section: Fig 3 Sem Images Of Composites Ab0 (A) and Ab4(b) And Thementioning

confidence: 99%

“…Besides, these metal nanoparticles can role as sinks to trap electrons flowed from semiconductors upon excitation, which facilitates the separation of photogenerated electron-hole pairs. Till now, several cases of Ag/bismuth oxyhalide plasmonic photocatalysts have been reported [18][19][20]. However, to the best of our knowledge, the synthesis and photocatalytic evaluation of Ag/Bi 12 [10].…”

Section: Introductionmentioning

confidence: 97%

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Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Chang

Wang

Luo

et al. 2017

Molecular Catalysis

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a b s t r a c tIn this investigation, novel Ag/Bi 12 O 17 Cl 2 plasmonic composites with different Ag contents were constructed through a solvothermal and subsequent photoreduction route and fully characterized by a collection of analytical techniques. Spectroscopic results confirmed the presence and uniform dispersion of Ag nanoparticles on the 2D nanosheets of Bi 12 O 17 Cl 2 . The Ag content in composites exerted considerable influence on the extension of light-adsorption range and the enlargement of specific surface areas. The photocatalytic abilities of these Ag/Bi 12 O 17 Cl 2 composites were evaluated toward the degradation of rhodamine B (RhB) and 2,4-dichlorophenol (2,4-DCP) under the visible-light irradiation. The results demonstrated that the Ag/Bi 12 O 17 Cl 2 composites showed much higher photocatalytic efficiencies than that of pure Bi 12 O 17 Cl 2 , especially the sample with an optimal Ag content showing the best photocatalytic behavior among all tested samples. The remarkable enhancement of Ag/Bi 12 O 17 Cl 2 photocatalytic efficiency could be mainly attributed to the efficient charge separation that was induced by the localized surface plasmon resonance effect of metallic Ag, strong visible-light adsorption and the favorable morphology with enlarged specific surface areas. Eventually, the photocatalysis mechanism over Ag/Bi 12 O 17 Cl 2 composites was preliminarily proposed on the base of reactive species trapping experiments.

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Section: Fig 3 Sem Images Of Composites Ab0 (A) and Ab4(b) And Thementioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Chang

Wang

Luo

et al. 2017

Molecular Catalysis

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“…And The stretching vibration mode of ‐NH 2 or ‐NH‐ peaks can be seen at the 3000‐3300 cm −1 , which are ascribed to the defect area of the aromatic ring . The pattern of h‐BN revealed peak at 808 cm −1 which can be assigned to the out‐of‐plane bending vibration of B−N‐B bond . The peak at 1385 cm −1 belongs to the B−N stretching vibration in plane.…”

Section: Resultsmentioning

confidence: 97%

Synthesis of BN/g‐C₃N₄ as Visible‐light‐driven Photocatalysts for Degradation of Different Organic Pollutants

Liao

Deng

2018

ChemistrySelect

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In this work, BN/g‐C3N4 composites were prepared by hydrothermal reaction. The BN/g‐C3N4 composites were successfully characterized by FTIR spectra, XRD, SEM, HRTEM, UV/Vis DRS, N2 adsorption–desorption isotherms and BET. The photocatalytic activities of the as‐prepared catalysts were evaluated by the degradation of different organic pollutants, such as Acid Red (AR), Rhodamine B (RhB), Congo Red (CR), Methyl Orange (MO), Methyl Red (MR), and Phenol. The best result showed that the 40 wt% BN was added to g‐C3N4 (BN/g‐C3N4‐4) achieved up to 99% decomposition of AR within 90 min under visible‐light irradiation. The kinetics of BN/g‐C3N4 ‐4 for degradation of AR was almost six times than that of pure g‐C3N4. Finally, the degradation processes of different pollutants and the photocatalytic mechanism had been explained concretely.

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“…[32] Wang and coworkers used af acile impregnation-roasting method to prepare aA g/g-C 3 N 4 composite. [34] To achievea no ptimal photocatalytic activity,t he combination of the two above-mentioned strategiesi sa pplied to the preparation of ah eterostructured photocatalyst. Recently,D i and co-workersr eported that Ag quantum dots were deposited onto the surface of BiOBr nanosheetst og enerate ah eterostructured Ag/BiOBrm etal-semiconductor with an enhanced photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

“…Recently,D i and co-workersr eported that Ag quantum dots were deposited onto the surface of BiOBr nanosheetst og enerate ah eterostructured Ag/BiOBrm etal-semiconductor with an enhanced photocatalytic performance. [34] To achievea no ptimal photocatalytic activity,t he combination of the two above-mentioned strategiesi sa pplied to the preparation of ah eterostructured photocatalyst. [35][36][37][38] To our knowledge,s uch ad esign strategy for visible-light-driven Bi 2 MoO 6 -based photocatalytic materials hass eldom been reported.…”

Section: Introductionmentioning

confidence: 99%

Efficient Degradation of Phenol and 4‐Nitrophenol by Surface Oxygen Vacancies and Plasmonic Silver Co‐Modified Bi₂MoO₆ Photocatalysts

Shen

Xue

et al. 2018

Chemistry A European J

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In this work, the surface plasmon resonance effect of metallic Ag, surface oxygen vacancies (SOVs), and Bi 2 MoO 6 (BMO) material werer ationally combined to construct new oxygen-vacancy-rich Ag/Bi 2 MoO 6 (A/BMO-SOVs) photocatalysts. Their synergistic effect on the photocatalytic degradation of phenol and4 -nitrophenol under visible-light irradiation (l ! 420 nm) was also investigated. TEM, EPR, and Raman spectra demonstrate the co-existence of metallicA g nanoparticles, surface oxygen vacancies, and Bi 2 MoO 6 due to ac ontrolled calcination process. The experimental results disclose that the 2%A/BMO-SOVs-375 sample exhibited the highest photocatalytic activity for the degradation of both phenol and 4-nitrophenol under visible-light irradiation, achieving nearly 100 and 80 %r emoval efficiency,r espectively, and demonstrated the apparent reactionr ate constants (k app )1 83 and 26.5 times, respectively,h ighert han that of pure Bi 2 MoO 6 .T he remarkable photodegradation performance of A/BMO-SOVs for organic substances is attributed to the synergistic effect between the surface oxygen vacancies, metallic Ag nanoparticles, and Bi 2 MoO 6 ,w hich not only improves the visible-light response ability,but also facilitates charge separation. Thus, this work provides an effective strategy forthe design and fabrication of highly efficient photocatalysts through integrating surface oxygen vacancies and the surfacep lasmon resonance effect of nanoparticles, which has the potential for both water treatment and air purification.

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New insight of Ag quantum dots with the improved molecular oxygen activation ability for photocatalytic applications

Cited by 143 publications

References 62 publications

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Synthesis of BN/g‐C₃N₄ as Visible‐light‐driven Photocatalysts for Degradation of Different Organic Pollutants

Efficient Degradation of Phenol and 4‐Nitrophenol by Surface Oxygen Vacancies and Plasmonic Silver Co‐Modified Bi₂MoO₆ Photocatalysts

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New insight of Ag quantum dots with the improved molecular oxygen activation ability for photocatalytic applications

Cited by 143 publications

References 62 publications

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Synthesis of BN/g‐C3N4 as Visible‐light‐driven Photocatalysts for Degradation of Different Organic Pollutants

Efficient Degradation of Phenol and 4‐Nitrophenol by Surface Oxygen Vacancies and Plasmonic Silver Co‐Modified Bi2MoO6 Photocatalysts

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Product

Resources

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Synthesis of BN/g‐C₃N₄ as Visible‐light‐driven Photocatalysts for Degradation of Different Organic Pollutants

Efficient Degradation of Phenol and 4‐Nitrophenol by Surface Oxygen Vacancies and Plasmonic Silver Co‐Modified Bi₂MoO₆ Photocatalysts