Metal Nanoparticles Anchored on Rhenium Disulfide Nanosheets as Catalysts for the Reduction of Aromatic Nitro Compounds

Dhenadhayalan, Namasivayam; Lin, Tsung Yi; Veerakumar, Pitchaimani; Lin, King‐Chuen

doi:10.1002/cnma.201800353

Cited by 12 publications

(15 citation statements)

References 57 publications

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“…In addition, the isosbestic point observed at ≈325 nm indicates the absence of any byproducts in the reaction. The reduction process of 4‐NP into 4‐aminophenol may involve six‐electron (6e − ) and six‐hydrogen (6H + ) ions transfer, as previously reported . Such electron/hydrogen transfers are mediated via Pd NPs from NaBH 4 to 4‐NP.…”

Section: Resultssupporting

confidence: 56%

“…The XRD spectrum of C‐dots exhibits a broad peak centered at ≈21.7° ( Figure a) indicating the amorphous nature of C‐dots due to the presence of oxygen‐containing groups on the surface . For Pd/C‐dots, the XRD spectrum remains almost the same peak position of C‐dots, in addition to the characteristic peaks of Pd at 39.8°, 46.4°, and 67.8° ascribed to (111), (200), and (220) planes of the zero‐valence metallic Pd NPs . The obtained sharp peaks of Pd signify their good crystallinity, consistent with FETEM result.…”

Section: Resultsmentioning

confidence: 82%

“…Then, the 4‐nitrophenolate ion undergoes further reduction resulting in the disappearance of the absorption peak (≈400 nm) and concomitantly forming a new peak at ≈305 nm. The new peak formation assigned to the 4‐aminophenol product suggests further hydrogen transfers . In addition, the isosbestic point observed at ≈325 nm indicates the absence of any byproducts in the reaction.…”

Section: Resultsmentioning

confidence: 93%

“…The XPS spectrum of Pd exhibits 337.2 and 342.9 eV (Figure a), which are ascribed to Pd 3d 5/2 and 3d 3/2 , respectively. The presence of Pd in the zero‐valence oxidation state (Pd 0 ) should strengthen the formation of Pd NPs . For C 1s, four peaks were observed at 282.2, 284.8, 286.9, and 288.5 eV corresponding to CC, CC, CO, and CO components, respectively (Figure b), whereas the O 1s spectrum shows two peaks at 532.5 and 534.2 eV corresponding to CO and C=O components, respectively (Figure c) .…”

Section: Resultsmentioning

confidence: 99%

“…The rate constant ( k ) for the reduction reaction of 4‐NP was determined using the pseudo‐first‐order kinetic equation as follows

\ln (A_{t} normal/ A_{0}) = - k t

where A 0 and A t are the absorbances at zero‐ and definite‐time, respectively. A plot of absorbance change ln( A t / A 0 ) against time exhibits linearity up to certain reaction time, as shown in Figure b,d.…”

Section: Resultsmentioning

confidence: 99%

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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: Resultssupporting

confidence: 56%

Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

“…The rate constant ( k ) for the reduction reaction of 4‐NP was determined using the pseudo‐first‐order kinetic equation as follows

\ln (A_{t} normal/ A_{0}) = - k t

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

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

Dhenadhayalan

Hsin

Lin

2019

Adv Materials Inter

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Solution Combustion Synthesis of NiS‐NiS₂ Nanoparticles for Catalytic Reduction of Nitro Aromatics

Manjula

Manjunatha²,

Nagashree³

et al. 2023

ChemistrySelect

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Exploring an efficient and economic reductant for nitro aromatics is of great significance for environmental remediation. In this work, nickel sulfide catalysts have been prepared by simple solution combustion method from a mixture of nickel(II) nitrate hexahydrate as oxidant (O) and thiourea as fuel (F) in different ratios. The phase and crystallinity, composition and morphology of synthesized samples were obtained by X‐ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM), X‐ray photoelectron spectroscopy (XPS), Raman spectroscopy and Fourier transform infrared (FTIR) techniques. The catalytic efficiency of as synthesized nickel sulfide nanoparticles towards reduction of 4‐nitrophenol (4‐NP) as a model compound using sodium borohydride as the reducing agent was explored. The catalyst prepared with 1 : 3 O/F ratio that composed of NiS and NiS2 phases exhibited highest efficiency towards catalytic reduction of 4‐NP and the rate constant was found to be 0.429 min−1. Further, the catalyst could effectively reduce the nitro group in 2‐nitroaniline, 4‐nitroaniline and picric acid also. Reduced products of 2‐nitroaniline and 4‐nitrophenol were employed for the synthesis of benzimidazole and paracetamol successfully.

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Novel binary composite of manganese ferrite/tungsten disulfide as a superior photocatalyst and ultra-reusability in reduction of nitroarenes

Nooriyan

Bezaatpour

Nuri

et al. 2023

Catalysis Communications

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Metal Nanoparticles Anchored on Rhenium Disulfide Nanosheets as Catalysts for the Reduction of Aromatic Nitro Compounds

Cited by 12 publications

References 57 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

Solution Combustion Synthesis of NiS‐NiS₂ Nanoparticles for Catalytic Reduction of Nitro Aromatics

Novel binary composite of manganese ferrite/tungsten disulfide as a superior photocatalyst and ultra-reusability in reduction of nitroarenes

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Metal Nanoparticles Anchored on Rhenium Disulfide Nanosheets as Catalysts for the Reduction of Aromatic Nitro Compounds

Cited by 12 publications

References 57 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

Solution Combustion Synthesis of NiS‐NiS2 Nanoparticles for Catalytic Reduction of Nitro Aromatics

Novel binary composite of manganese ferrite/tungsten disulfide as a superior photocatalyst and ultra-reusability in reduction of nitroarenes

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Solution Combustion Synthesis of NiS‐NiS₂ Nanoparticles for Catalytic Reduction of Nitro Aromatics