Surface plasmon-induced photodegradation of methylene blue with single layer graphene quantum dots/Au nanospheres under visible-light irradiation

Dejpasand, Mohamad Taghi; Saievar-Iranizad, Esmaiel; Bayat, Amir; Ardekani, Saeed Rahemi

doi:10.1016/j.jallcom.2021.160904

Cited by 10 publications

(5 citation statements)

References 54 publications

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“…The mechanism (figure 12) revealed the synergistic effect between Ag NPs and GQDs. Dejpasand et al prepared GQDs/Au nanospheres composite by UV reduction [122] (figure 13). After 120 min, the catalyst degraded 85% of methylene blue under visible light.…”

Section: Photocatalysismentioning

confidence: 99%

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Preparation of carbon dots-metal nanoparticles nanocomposites and their application in heterogeneous catalysis

Li,

Zhang

et al. 2023

Nano Futures

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Since metal nanoparticles-carbon quantum dots nanocomposites combine the advantages of both carbon quantum dots and metal nanoparticles, they show unique properties and are applied in heterogeneous catalysis. In the nanocomposite catalysts, CODs can act as modifiers to modulate the electronic properties of the metals or produce synergy with the metals. Consequently, the nanocomposite catalysts have good catalytic performance. This paper summarizes the preparation methods of nanocomposite catalysts and focuses on their applications in heterogeneous catalysis. Various specific preparation methods are not only summarized as completely as possible but also are also classified at the macro logic level. The applications of the nanocomposite catalysts in heterogeneous catalysis include photocatalysis, sonocatalysis, electrocatalysis, and thermal catalysis. It also reveals how the nanocomposite catalysts produce excellent catalytic performances in various catalytic reactions. Finally, the existing problems and the direction of future efforts are proposed. It is hoped that this paper will provide a slight reference for the future research of metal nanoparticles-carbon quantum dots nanocomposite catalysts and their application in the field of catalysis.a:Industrial Catalysis Institute of Zhejiang University of Technology, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Hangzhou, 310032, People’s Republic of China

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Section: Photocatalysismentioning

confidence: 99%

“…Overall, the nanocomposite catalysts have good stability. However, only a few papers have studied some detailed issues such as catalyst poisoning [108], metal leach [126], and catalyst precipitation [122]. For the stability of the nanocomposite catalysts, more detailed and in-depth research is needed in the future.…”

Section: Thermocatalysismentioning

confidence: 99%

Preparation of carbon dots-metal nanoparticles nanocomposites and their application in heterogeneous catalysis

Li,

Zhang

et al. 2023

Nano Futures

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“…Recently, the surface plasmon resonance (SPR) effect of noble metals such as gold and silver has been used to enhance the visible light catalytic activity of semiconductor photocatalysts [22,23]. The collective oscillation of free electrons in noble metals gives rise to the SPR effect, resulting in strong absorption in the solar region.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Bi-Modified Bi2Sn2O7 Nanosheets for Efficient Photocatalytic NO Removal

Li,

Zhao,

Zhang

et al. 2024

Catalysts

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The photocatalytic removal of nitric oxide (NO) is a promising technology used to reduce the level of harmful gaseous pollutants in parts per billion (ppb). As a potential photocatalyst, Bi2Sn2O7 has a low quantum efficiency due to its fast recombination rate of photo-generated carriers. In this paper, Bi/Bi2Sn2O7 was prepared by the in situ deposition of Bi. The structural, electrical, and optical properties of the attained sample were investigated through a series of analyses. The results demonstrate that Bi nanoparticles not only enhance the photoabsorption ability of Bi2Sn2O7 due to their surface plasmon resonance (SPR) effect, but also improve its photocatalytic activity. Photocatalytic performance was evaluated by the oxidation of NO at ppb level under xenon lamp (λ > 400 nm) irradiation. It was found that the photocatalytic NO removal rate increased from 7.2% (Bi2Sn2O7) to 38.6% (Bi/Bi2Sn2O7). The loading of Bi promotes the separation and migration of photo-generated carriers and enhances the generation of •O2− and •OH radicals responsible for the oxidation of NO. The Bi/Bi2Sn2O7 composite photocatalyst also exhibits excellent photocatalytic stability, which makes it a potential candidate for use in air purification systems.

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“…Metal nanoparticles (NP) find their numerous applications in different fields of fundamental research, industry, and medicine , due to their unique optical properties, electronic structure, tunable surface sites for catalytical reactions, − and antibacterial and anticancer effects. , The gold nanoparticles represent a unique case that combines all these properties. They can be synthesized in different sizes and shapes − that are appropriate, e.g., for the task of dye photodegradation, local electromagnetic field generation, and molecular sensors …”

Section: Introductionmentioning

confidence: 99%

“…9,10 The gold nanoparticles represent a unique case that combines all these properties. They can be synthesized in different sizes and shapes 11−14 that are appropriate, e.g., for the task of dye photodegradation, 15 local electromagnetic field generation, 16 and molecular sensors. 17 The most common method for synthesis reported in the literature is the preparation of spherical nanoparticles with the Turkevich protocol 18−20 where sodium citrate reduces Au 3+ ions from the HAuCl 4 precursor and stabilizes nanoparticles in aqueous medium.…”

Section: Introductionmentioning

confidence: 99%

Machine Learning Analysis of Reaction Parameters in UV-Mediated Synthesis of Gold Nanoparticles

et al. 2023

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Gold nanoparticles represent an important class of functional nanomaterials for optoelectronics, biomedical applications, and catalysis. Therefore, controllable synthesis of nanoparticles with specified size and shape is important. Though reduction of gold ions is quite a simple process and may be performed with many different protocols, the reproducibility of the results and transfer of protocols between independent research groups remains a challenging task. Machine learning analysis based on statistical approaches is hardly applicable to the published data, since most of the researchers report only successful syntheses. In this work, we apply uniform sampling of the reaction parameter space. The concentrations of gold precursor, reducing agent, and surfactant were varied via an improved Latin hypercube sampling, and each run was performed under in situ UV−vis control. Based on the resulting set of optical spectra, we address the relevant chemical questions about nanoparticle formation, their shape, and period of growth. Our work demonstrates a data driven approach applied to the space of reaction parameters in a limited available set of experiments.

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Surface plasmon-induced photodegradation of methylene blue with single layer graphene quantum dots/Au nanospheres under visible-light irradiation

Cited by 10 publications

References 54 publications

Preparation of carbon dots-metal nanoparticles nanocomposites and their application in heterogeneous catalysis

Preparation of carbon dots-metal nanoparticles nanocomposites and their application in heterogeneous catalysis

Plasmonic Bi-Modified Bi2Sn2O7 Nanosheets for Efficient Photocatalytic NO Removal

Machine Learning Analysis of Reaction Parameters in UV-Mediated Synthesis of Gold Nanoparticles

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