Synthesis and characterizations of ultra-small ZnS and Zn(1−x)FexS quantum dots in aqueous media and spectroscopic study of their interactions with bovine serum albumin

Khani, Omid; Rajabi, Hamid Reza; Yousefi, Mostafa; Khosravi, Ali; Jannesari, Mohammad; Shamsipur, Mojtaba

doi:10.1016/j.saa.2011.03.025

Cited by 100 publications

(38 citation statements)

References 66 publications

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“…18 The average size from the three peaks gave a diameter of 2.3 nm. This value was similar to that (1.5-3.0 nm) found during XRD analysis of several ZnS materials 11,16 and it was concluded that ZnS nanoparticles were formed. The NP size found by XRD (2.3 nm) was smaller than the NPs visible in Fig.…”

Section: Resultssupporting

confidence: 89%

“…XRD also gives information about the crystal structure. Several studies 11,12,16,17 have shown that the three peaks can be assigned to the reection of a cubic crystal structure of ZnS with c(111) at 28.9 , c(220) at 47.6 and c(311) at 57.5 . The XRD powder pattern was also used to calculate the crystalline domain size by application of the Debye-Scherrer equation.…”

Section: Resultsmentioning

confidence: 99%

“…Various options have been examined to reduce the high cost of synthesis of ZnS NPs at scale. Khani et al 11 used ZnCl 2 and Na 2 S with 2-mercaptoethanol as the capping agent. Later, Senthilkumar et al 12 used Zn 2+ solution with Na 2 S and mercaptopropionic acid in the presence of tetrapropyl ammonium hydroxide with a reuxing step.…”

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confidence: 99%

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Biosynthesis of zinc sulfide quantum dots using waste off-gas from a metal bioremediation process

et al. 2017

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Dissimilatory reduction of sulfate, mediated by various species of sulfate-reducing bacteria (SRB) and a few characterized species of archaea, can be used to remediate acid mine drainage (AMD). Hydrogen sulfide (H 2 S/HS À ) generated by SRB removes toxic metals from AMD as sulfide biominerals. For this, SRB are usually housed in separate reactor vessels to those where metal sulfides are generated; H 2 S is delivered to AMD-containing vessels in solution or as a gas, allowing controlled separation of metal precipitation and facilitating enhanced process control. Industries such as optoelectronics use quantum dots (QDs) in various applications, e.g. as light emitting diodes and in solar photovoltaics. QDs are nanocrystals with semiconductor bands that allow them to absorb light and re-emit it at specific wavelength couples, shifting electrons to a higher energy and then emitting light during the relaxation phase. Traditional QD production is costly and/or complex. We report the use of waste H 2 S gas from an AMD remediation process to synthesize zinc sulfide QDs which are indistinguishable from chemically prepared counterparts with respect to their physical and optical properties, and highlight the potential for a empirical process to convert a gaseous "waste" into a high value product.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

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Biosynthesis of zinc sulfide quantum dots using waste off-gas from a metal bioremediation process

et al. 2017

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“…Among the alternative cases for low-dimensional materials for photocatalytic applications, ultrasmall semiconductor nanocrystals (i.e., QDs) have recently emerged as a novel class of nanomaterials with unique physicochemical, electronic, magnetic and optical properties. Surprisingly, despite exhibiting very interesting properties, the use of QDs in environmental applications has only recently attracted attention from scientists [26][27][28][29][30][31].…”

Section: Photocatalytic Activity Of Qdsmentioning

confidence: 99%

Photocatalytic Activity of Quantum Dots

Rajabi¹

2016

Semiconductor Photocatalysis - Materials, Mechanisms and Applications

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In recent years, nanoscale semiconductors have attracted great interest due to their unique structural, optical and electronic properties, which arise due to their large surface-to-volume ratio and quantum confinement effect. Quantum dots (QDs) as zerodimensional semiconductor nanomaterials, which are confined to a size of 2-8 nm in three dimensions, are defined as particles with physical dimensions smaller than the exciton Bohr radius. One of the attractive research fields in recent years is the synthesis of various sizes and shapes of semiconductor material nanoparticles as doped with different dopants. The aim of this chapter is to focus on the photocatalytic activity of QDs as new, green and efficient nanophotocatalysts.

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“…The average number of binding sites for CS@ZnS:Mn D-dots per molecule of BSA is 0.906, equal to 1, indicating that there is one class of binding site for CS@ZnS:Mn D-dots to BSA molecule. To elucidate the nature of interaction between CS@ZnS:Mn D-dots with BSA, the thermodynamic parameters were calculated from the van't Hoff plots at three temperatures (293, 303, and 313 K) [29]. Both the enthalpy change ( H) and entropy changes ( S) can be evaluated, as:…”

Section: Spectroscopic Studies Of Cs@zns:mn-bsa Interactionmentioning

confidence: 99%

Studies of the interaction of CS@ZnS:Mn with bovine serum albumin under illumination

Liu

Xiao

2015

Applied Surface Science

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Synthesis and characterizations of ultra-small ZnS and Zn(1−x)FexS quantum dots in aqueous media and spectroscopic study of their interactions with bovine serum albumin

Cited by 100 publications

References 66 publications

Biosynthesis of zinc sulfide quantum dots using waste off-gas from a metal bioremediation process

Biosynthesis of zinc sulfide quantum dots using waste off-gas from a metal bioremediation process

Photocatalytic Activity of Quantum Dots

Studies of the interaction of CS@ZnS:Mn with bovine serum albumin under illumination

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