Carbon dot reduced bimetallic nanoparticles: size and surface plasmon resonance tunability for enhanced catalytic applications

Essner, Jeremy B.; Laber, Charles H.; Baker, Gary A.

doi:10.1039/c5ta02949j

Cited by 60 publications

(37 citation statements)

References 48 publications

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“…Such metal nanoparticles play a vital role in the catalytic reduction showing effective performance compared to other bare nanomaterials. In order to further improve their catalytic activity, the metal nanoparticles were incorporated with diverse nanomaterials including carbon‐based materials, transition metal dichalcogenides (TMD), and porous organic cages …”

Section: Introductionmentioning

confidence: 99%

Multifunctional Nanohybrid of Palladium Nanoparticles Encapsulated by Carbon‐Dots for Exploiting Synergetic Applications

Dhenadhayalan

Hsin

Lin

2019

Adv Materials Inter

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and textile. [2,7] It can be readily bound to biomolecules and consequently used as a strain to tissue and cells. [8] However, the application of abnormal level of EY becomes toxic and unfriendly to both the environment and living things. The development of reduction/degradation of nitro compound and dye is thus much needed to convert these materials into harmless products. For instance, the 4-NP and EY could be catalytically reduced into the formation of 4-aminophenol and reduced form of EY, respectively, and believe that this process could become potentially an effective way to treat 4-NP and EY in polluted water. Accordingly, the design and development of proficient catalyst are a significant task for the catalytic reduction of 4-NP and EY with aspects of the efficient and fast process. The nanomaterial-based catalysts are enormously developed for their superior catalytic performance in the reduction of pollutants. [9][10][11][12][13] In general, metal nanoparticles are usually adopted for the catalysis application; especially palladium nanoparticles (Pd NPs) exhibited excellent catalytic activities. [14][15][16] Such metal nanoparticles play a vital role in the catalytic reduction showing effective performance compared to other bare nanomaterials. In order to further improve their catalytic activity, the metal nanoparticles were incorporated with diverse nanomaterials including carbon-based materials, transition metal dichalcogenides (TMD), and porous organic cages. [17][18][19][20][21][22][23][24][25] Compared to other fluorescent nanomaterials, the C-dots can be easily synthesized from different kind of sources including organic molecules, biowastes, proteins, amino acids, and so on. [26][27][28][29][30][31][32] Moreover, the surface of C-dots can be modified with several capping agents to improve their fluorescence properties according to the applications. [33][34][35][36][37] That's why the C-dots have been extensively utilized in the fields of chemo-and biosensors, and optoelectronic applications. Thus far, the C-dots are much less utilized in the catalysis as in the sensing application. By taking advantage of C-dots and Pd NPs, this work aims to develop a superior multifunctional nanohybrid in the multiple applications including chemical sensor and catalysis.With this intention, we have synthesized carbon-dots to encapsulate palladium nanoparticles (Pd/C-dots) by the photochemical method. Prior to the synthesis of Pd/C-dots, Palladium nanoparticles encapsulated in the carbon dots (Pd/C-dots) are demonstrated to play a role of multifunctional nanohybrid in the synergetic applications of sensor and catalysis. The photochemical method is applied to synthesize Pd/C-dots in which Pd nanoparticles (NPs) are dispersedly encapsulated by C-dots layer. The nanohybrid can function as a fluorescent sensor and reductive catalyst, due to the inherent properties of C-dots and Pd NPs, respectively. The Pd/C-dots exhibit a highly selective and sensitive detection toward the nickel (Ni 2+ ) ion with a detection limit of ...

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Section: Introductionmentioning

confidence: 99%

Multifunctional Nanohybrid of Palladium Nanoparticles Encapsulated by Carbon‐Dots for Exploiting Synergetic Applications

Dhenadhayalan

Hsin

Lin

2019

Adv Materials Inter

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“…The carbon quantum dot (CQD) is a newly discovered nanomaterial of carbon family with size of below 10nm. CQD demonstrates unique and excellent optical properties such as excitation wavelength dependent fluorescence and excellent photostability [6]. The photoluminescence CQD is highly soluble in water, inert to chemical and negligible toxicity, plus its role as electron acceptors or donors in redox reaction make it suitable for photocatalytic applications when combining with g-C3N4.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Synthesis of Carbon Dots/g-C₃N₄ Nanocomposites for Photocatalytic Application

et al. 2018

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This study reports a fast and green preparative strategy to synthesize water soluble and fluorescent carbon quantum dots (CQDs) through hydrothermal method by using low cost organic waste of human fingernails as the carbon precursor for the first time. The coupling of CQD with pure carbon nitride (g-C3N4) was further explored to enhance the latter’s performance in photocatalysis of 2,4-dicholorophenol (2,4-DCP), a toxic and recalcitrant compound mostly released from industrial effluent. Such coupling overcame the weakness of pure g-C3N4 in photocatalysis process by broadening its visible light absorption and promoting the charge separation. As a result, the removal rate of CQD/ g-C3N4(10) was up to 71.53%, which was approximately 1.5 times higher than that of pure g-C3N4 under sunlight irradiation. The morphological structure, optical properties and chemical compositions of CQDs/g-C3N4 composites were characterized using various spectroscopic techniques including field emission scanning electron microscopy (FESEM), Energy Dispersive X-Ray (EDX) and Ultraviolet-visible diffuse reflectance spectra (UV-DRS).

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“…In particular, bimetallic gold/silver nanoparticles (AuAgNPs) provide an inexpensive alternative to monometallic AuNP catalysts while generally possessing higher catalytic activity for the reduction of nitroarenes. [16][17][18][19][20][21][22] Herein, we investigate a slightly modied Astruc method for the synthesis of monometallic AuNPs and AgNPs as well as bimetallic Au x Ag 1Àx NPs (where x ranges from 0.9 to 0.1 in 0.1 increments) using NaBH 4 as the sole reducing/stabilizing agent. Three distinct molar ratios of reducing agent to metal (denoted herein as R values; specically, R ¼ 2, 5, and 10) were used to create sets of monometallic/bimetallic NP solutions as shown in Tables S1-S3.…”

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confidence: 99%

Borohydride stabilized gold–silver bimetallic nanocatalysts for highly efficient 4-nitrophenol reduction

et al. 2019

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Carbon dot reduced bimetallic nanoparticles: size and surface plasmon resonance tunability for enhanced catalytic applications

Abstract: Carbon dots derived from citric acid pyrolysis were competent reductants and stabilizing agents in the eco-friendly preparation of Ag, Au, and bimetallic AuAg nanoparticles which presented plasmonic, size, and catalytic tunability.

Cited by 60 publications

References 48 publications

Multifunctional Nanohybrid of Palladium Nanoparticles Encapsulated by Carbon‐Dots for Exploiting Synergetic Applications

Multifunctional Nanohybrid of Palladium Nanoparticles Encapsulated by Carbon‐Dots for Exploiting Synergetic Applications

Bioinspired Synthesis of Carbon Dots/g-C₃N₄ Nanocomposites for Photocatalytic Application

Borohydride stabilized gold–silver bimetallic nanocatalysts for highly efficient 4-nitrophenol reduction

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Carbon dot reduced bimetallic nanoparticles: size and surface plasmon resonance tunability for enhanced catalytic applications

Abstract: Carbon dots derived from citric acid pyrolysis were competent reductants and stabilizing agents in the eco-friendly preparation of Ag, Au, and bimetallic AuAg nanoparticles which presented plasmonic, size, and catalytic tunability.

Cited by 60 publications

References 48 publications

Multifunctional Nanohybrid of Palladium Nanoparticles Encapsulated by Carbon‐Dots for Exploiting Synergetic Applications

Multifunctional Nanohybrid of Palladium Nanoparticles Encapsulated by Carbon‐Dots for Exploiting Synergetic Applications

Bioinspired Synthesis of Carbon Dots/g-C3N4 Nanocomposites for Photocatalytic Application

Borohydride stabilized gold–silver bimetallic nanocatalysts for highly efficient 4-nitrophenol reduction

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Bioinspired Synthesis of Carbon Dots/g-C₃N₄ Nanocomposites for Photocatalytic Application