Silver decorated magnetic nanocomposite (Fe3O4@PPy-MAA/Ag) as highly active catalyst towards reduction of 4-nitrophenol and toxic organic dyes

Das, Ranajit; Sypu, Venkata Satyanarayana; Paumo, Hugues Kamdem; Bhaumik, Madhumita; Maharaj, Vinesh; Maity, Arjun

doi:10.1016/j.apcatb.2018.11.073

Cited by 341 publications

(109 citation statements)

References 66 publications

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“…This higher rate constant reveals that the catalytic reduction of 4‐NP is more feasible with a higher concentration of Pd/C‐dots. In comparison with those obtained by nanomaterial‐based catalysts, the as‐prepared Pd/C‐dots were found to show better catalytic efficiency (Table S2, Supporting Information) . The mechanism for the reduction of 4‐NP by Pd/C‐dots is shown in Scheme .…”

Section: Resultsmentioning

confidence: 94%

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: Resultsmentioning

confidence: 94%

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 results show that AC-1-Ag NCs has better catalytic activity. The Schottky barrier existing at the interfaces of the noble metal and the semiconductor enhances the collection efficiency of carriers, but more importantly Ag nanocrystals on the surfaces and internal Au cores of AC-1-Ag NCs jointly facilitate the charge transfer from BH 4 − to MO [65]. The synergistic effects of AC-1-Ag NCs and NaBH 4 greatly promoted the catalytic efficiency of AC-1-Ag NCs.…”

Section: Resultsmentioning

confidence: 99%

A Novel Au@Cu2O-Ag Ternary Nanocomposite with Highly Efficient Catalytic Performance: Towards Rapid Reduction of Methyl Orange Under Dark Condition

Kou

Zheng

et al. 2019

Nanomaterials

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Au@Cu2O core-shell nanocomposites (NCs) were synthesized by reducing copper nitrate on Au colloids with hydrazine. The thickness of the Cu2O shells could be varied by adjusting the molar ratios of Au: Cu. The results showed that the thickness of Cu2O shells played a crucial role in the catalytic activity of Au@Cu2O NCs under dark condition. The Au@Cu2O-Ag ternary NCs were further prepared by a simple galvanic replacement reaction method. Moreover, the surface features were revealed by TEM, XRD, XPS, and UV–Vis techniques. Compared with Au@Cu2O NCs, the ternary Au@Cu2O-Ag NCs had an excellent catalytic performance. The degradation of methyl orange (MO) catalyzed by Au@Cu2O-Ag NCs was achieved within 4 min. The mechanism study proved that the synergistic effects of Au@Cu2O-Ag NCs and sodium borohydride facilitated the degradation of MO. Hence, the designed Au@Cu2O-Ag NCs with high catalytic efficiency and good stability are expected to be the ideal environmental nanocatalysts for the degradation of dye pollutants in wastewater.

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“…As shown in Fig. 3d, the absorption peak at 1550 cm À1 is attributed to the anti-symmetric stretching of pyrrole ring due to the stretching vibration of the C]C bond; the absorption peaks observed at 1400 and 1043 cm À1 correspond to the N-H and C-H deformation vibrations; and the peak at 1217 cm À1 is derived from C-N + stretching, 46,47 moreover 940 cm À1 and 790 cm À1 are the C-C bond vibration and the outof-plane vibration of C-H bond, 41 respectively.…”

Section: Characterization Of the Catalystmentioning

confidence: 94%

Magnetic recyclable CoFe₂O₄@PPy prepared by in situ Fenton oxidization polymerization with advanced photo-Fenton performance

et al. 2020

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Silver decorated magnetic nanocomposite (Fe3O4@PPy-MAA/Ag) as highly active catalyst towards reduction of 4-nitrophenol and toxic organic dyes

Cited by 341 publications

References 66 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

A Novel Au@Cu2O-Ag Ternary Nanocomposite with Highly Efficient Catalytic Performance: Towards Rapid Reduction of Methyl Orange Under Dark Condition

Magnetic recyclable CoFe₂O₄@PPy prepared by in situ Fenton oxidization polymerization with advanced photo-Fenton performance

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Silver decorated magnetic nanocomposite (Fe3O4@PPy-MAA/Ag) as highly active catalyst towards reduction of 4-nitrophenol and toxic organic dyes

Cited by 341 publications

References 66 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

A Novel Au@Cu2O-Ag Ternary Nanocomposite with Highly Efficient Catalytic Performance: Towards Rapid Reduction of Methyl Orange Under Dark Condition

Magnetic recyclable CoFe2O4@PPy prepared by in situ Fenton oxidization polymerization with advanced photo-Fenton performance

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Magnetic recyclable CoFe₂O₄@PPy prepared by in situ Fenton oxidization polymerization with advanced photo-Fenton performance