Reverse micelle assisted hydrothermal reaction route for the synthesis of homogenous MoS2 nanospheres

Nair, J. S. Arya; Aswathi, R.; Sandhya, K

doi:10.1007/s42452-019-0528-y

Cited by 7 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inorganic graphene analogues (IGAs) are a new class of 2D nanomaterials having distinctive properties and applications and their composites are widely explored in recent time [1][2][3][4]. Of the IGAs, WS 2 is a unique member with impressive electrical, magnetic and optical attributes [5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and dielectric studies of poly(1-naphthylamine)–tungsten disulphide nanocomposites

Saidu

Thomas

2020

SN Appl. Sci.

View full text Add to dashboard Cite

Here, novel poly(1-naphthylamine)-tungsten disulphide (PNA-WS 2 ) nanocomposites were synthesized through an in-situ chemical oxidative polymerization of 1-naphthylamine in the presence of ultrasonically dispersed WS 2 . The effect of WS 2 addition on the optoelectrical, morphological and thermal properties of PNA was studied by using different analytical tools. SEM images revealed that PNA aggregates are well supported on the dispersed WS 2 sheets. The formation of a fibrous network of PNA over the dispersed WS 2 layers evidenced from the TEM images has suggested larger surface area and better interfacial interaction between PNA and incorporated WS 2 layers . The thermal stability was improved upon the incorporation of WS 2 . Optical bandgap values of PNA-WS 2 nanocomposites were lower than that of bulk WS 2 and pristine PNA. Electrical and dielectric studies have confirmed an improvement in conductivity and dielectric properties with increasing WS 2 content, which was credited to the better charge transport between the polar backbone of PNA and charged surface of dispersed WS 2 due to enhanced interfacial area and electrostatic interactions between the components. A maximum AC conductivity of 4.4 × 10 -3 Sm −1 was displayed by nanocomposite containing 20% WS 2 loading and a further increase in WS 2 content showed a detrimental effect in electrical and dielectric properties. The present study has demonstrated that optical and dielectric properties of composites can be readily tuned by proper control of the composition and dispersion of WS 2 within the PNA matrix.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and dielectric studies of poly(1-naphthylamine)–tungsten disulphide nanocomposites

Saidu

Thomas

2020

SN Appl. Sci.

View full text Add to dashboard Cite

show abstract

“…[ 49–51 ] The spectrum of the MoS 2 bears the characteristic peaks of MoS 2 at ≈792, ≈1643, and ≈1739 cm –1 corresponding to the OSO, MoO, and MoS vibrations (denoted by # symbol). [ 52,53 ] However, in the case of prGO‐MoS 2 , the peaks observed in GO at ≈1137, 1217, 1557, and 3430 cm −1 disappeared or decreased dramatically, which indicates the removal of oxygen‐containing functional groups in GO and confirms the reduction of GO to prGO. The peaks at ≈1124 and ≈1730 cm –1 suggest that the residual oxygen‐containing functional groups after reduction were hydroxyl and epoxy groups.…”

Section: Resultsmentioning

confidence: 94%

Ultra‐Rapid Removal of Pb(II) Ions by a Nano‐MoS₂ Decorated Graphene Aided by the Unique Combination of Affinity and Electrochemistry

Nair

Saisree

Sandhya

2022

Advanced Sustainable Systems

Self Cite

View full text Add to dashboard Cite

co-precipitation, [11] cloud point extraction, [12] flocculation, [13] reverse osmosis, [14] and adsorption, [15,16] the adsorption-based removal methodology is one of the most promising and widely applied methods to remove pollutants from the environment due to its cost-effectiveness, simple operation, and environmental friendliness. [17] However, the efficiency of adsorption in the removal of toxic metal ions such as Pb (II) depends on the selectivity of the materials used toward the particular ions because of the presence of other pollutants and common metal ions in relatively higher concentrations in water and the very low (safe) level of Pb (II) that need to be achieved. [16] For past decades, various adsorbents have been explored to remove heavy metal ions, which included activated carbon [18,19] from various sources and methods, zeolites, [20,21] clays, [22,23] and polymers [24,25] which exhibited lower removal efficiency for Pb (II) due to the weak binding affinity toward Pb (II) and lack of selectivity.Recently, ultrathin 2D nanomaterials such as graphene (Gr), and Gr-based compounds, molybdenum disulfide (MoS 2 ), [26,27] boron nitride, etc., have gained immense attention as adsorption materials due to their higher theoretical surface area (SA), enhanced catalytic and other unique properties. [28][29][30][31] With its high theoretical SA (≈2630 m 2 g −1 ), chemical stability, and outstanding physicochemical properties, Gr has shown high adsorption capacities for toxic metal ions [32] compared to the other commonly studied adsorbents. [33][34][35][36] Similarly, MoS 2 exhibits higher SA in its nanoforms and, in addition, can exhibit a significant advantage in the adsorption of heavy metal ions such as Hg (II), Ag (I), Cd (II), and Pb (II) because of the affinity toward S 2ions. [37][38][39][40] A previous work from our group utilized MoS 2 -HNR for the removal of toxic metal ions, and it demonstrated simultaneous removal of toxic metal ions: Hg (II), Pb (II), and Ag (I) from groundwater and seawater samples with adsorption capacities as high as ≈1991, 1350, and 1267 mg g −1 for Hg (II), Ag (I), and Pb (II). Even though the maximum adsorption capacity of MoS 2 -HNR toward Pb (II) was higher, the MoS 2 -HNR required ≤30 min to decrease the [Pb (II)] to the safe level (≤10 ppb) in water. The results were able to be explained based on affinity and electrochemistry mechanism. Cost-effective adsorbent materials with high Pb(II) removal efficiency and selectivity are considered necessary for successfully removing Pb(II) contamination from drinking water because of their high-level toxicity and the ultralow safe level of ≤10 ppb in water. This study demonstrates the synthesis and the ultrafast Pb(II) removal capability of a partially reduced graphene oxide-nano-molybdenum disulfide composite (prGO-MoS 2 ). The prGO-MoS 2 exhibits thin sheets of prGO covered more or less uniformly with nano-MoS 2 , and the open architecture gives enhanced accessibility to the S 2and oxygen moieties present in prGO-MoS 2 . A singl...

show abstract

“…S1C†) corresponding to E 1 2g & A 1 g vibrational modes of the nano-MoS 2 and D, G, & 2D bands of the pGr, respectively. 11,30–32 The sharp peaks in the XRD pattern (Fig. 1D) indicates crystalline nature, and the peaks at 2 θ = 26.5° with a d spacing of 0.41 nm corresponds to the reflections of graphitic (002) plane, and the peak indexed at 15.2°, 32.6°, 43°, and 57° reflects MoS 2 planes (002), (004), (103), and (006).…”

Section: Resultsmentioning

confidence: 99%

“…For the past few years, two-dimensional layered nanomaterials such as graphene (Gr) and its analogues: molybdenum disulphide (MoS 2 ) and hexagonal boron nitride (h-BN) have gained immense attention in the field of EC sensors because of their remarkable properties like high specific surface area, improved catalytic properties, enhanced electrical and thermal conductivity, structural stability and flexibility. 12,[29][30][31] A previous work from our group demonstrated the advantages of a Gr obtained by pulverization of graphite ( pGr), for its simultaneous sensing of dopamine (DA), 12 ascorbic acid (AA), and uric acid (UA) with selectivity towards DA. In a succeeding work, we had demonstrated the ultra-selectivity towards DA when the pGr was combined with MoS 2 to form pGr-MoS 2 , which surpassed the selectivity property of all the other reported non-enzymatic/enzymatic DA sensors by exhibiting current response solely for DA in the presence of neurotransmitters of similar structure and other biomolecules.…”

Section: Introductionmentioning

confidence: 99%

Picomolar level electrochemical detection of hydroquinone, catechol and resorcinol simultaneously using a MoS₂ nano-flower decorated graphene

Saisree

Sandhya

2022

Analyst

Self Cite

View full text Add to dashboard Cite

show abstract

Reverse micelle assisted hydrothermal reaction route for the synthesis of homogenous MoS2 nanospheres

Cited by 7 publications

References 26 publications

Synthesis, characterization and dielectric studies of poly(1-naphthylamine)–tungsten disulphide nanocomposites

Synthesis, characterization and dielectric studies of poly(1-naphthylamine)–tungsten disulphide nanocomposites

Ultra‐Rapid Removal of Pb(II) Ions by a Nano‐MoS₂ Decorated Graphene Aided by the Unique Combination of Affinity and Electrochemistry

Picomolar level electrochemical detection of hydroquinone, catechol and resorcinol simultaneously using a MoS₂ nano-flower decorated graphene

Contact Info

Product

Resources

About

Reverse micelle assisted hydrothermal reaction route for the synthesis of homogenous MoS2 nanospheres

Cited by 7 publications

References 26 publications

Synthesis, characterization and dielectric studies of poly(1-naphthylamine)–tungsten disulphide nanocomposites

Synthesis, characterization and dielectric studies of poly(1-naphthylamine)–tungsten disulphide nanocomposites

Ultra‐Rapid Removal of Pb(II) Ions by a Nano‐MoS2 Decorated Graphene Aided by the Unique Combination of Affinity and Electrochemistry

Picomolar level electrochemical detection of hydroquinone, catechol and resorcinol simultaneously using a MoS2 nano-flower decorated graphene

Contact Info

Product

Resources

About

Ultra‐Rapid Removal of Pb(II) Ions by a Nano‐MoS₂ Decorated Graphene Aided by the Unique Combination of Affinity and Electrochemistry

Picomolar level electrochemical detection of hydroquinone, catechol and resorcinol simultaneously using a MoS₂ nano-flower decorated graphene