Raman spectroscopy of ZnS quantum dots

Trajić, J.; Kostić, R.; Romčević, N.; Romčević, M.; Mitrić, Miodrag; Lazović, Vladimir; Baláž, Peter; Stojanović, D.

doi:10.1016/j.jallcom.2015.03.027

Cited by 60 publications

(32 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For Z2G-1, Raman peaks appear at 212 cm −1 and 329 cm −1 corresponding to the characteristic E 1 (TO) and A 1 (LO) modes of the ZnS 44 . A blue shift in both E 1 and A 1 energy modes for Z2G-1 in compared to the bulk ZnS (E 1 : 274 cm −1 and A 1 : 352 cm −1 ) was observed which can be attributed to the confinement effect of optical phonons in the ZnS nanoparticles 45 . Similarly, Raman bands at about at 425 cm −1 and 560 cm −1 assigned to A 1 (TO) and E 2 (high) vibration modes of wurtzite ZnO were observed 46 .…”

Section: Resultsmentioning

confidence: 86%

Facile and scalable production of heterostructured ZnS-ZnO/Graphene nano-photocatalysts for environmental remediation

Lonkar

Pillai

Alhassan

2018

Sci Rep

119

View full text Add to dashboard Cite

A facile and eco-friendly strategy is described for the synthesis of ZnS-ZnO/graphene heterostructured nano-photocatalysts for the first time. This solvent-free and technologically scalable method involves solid-state mixing of graphite oxide (GO), Zn salt and surfeit yet non-toxic elemental sulfur using ball-milling followed by thermal annealing. The as-formed hybrids are composed of uniformly distributed in-situ formed ZnS-ZnO nanoparticles simultaneously within the thermally reduced GO (graphene) matrix. A series of hybrid compositions with varying content of ZnS/ZnO and graphene were prepared and thoroughly characterized. Further, the effect of heterostructure composition on the photocatalytic properties was investigated under visible-light illumination. The synergistic ZnS-ZnO/graphene hybridization promoted the band-gap narrowing compared to the pristine ZnS nanoparticles. The ZnS:ZnO composition was controlled by graphite oxide under thermal treatment and observed to be a crucial factor in enhancement of photocatalytic activity. As a proof of concept, the phase optimized and surface enhanced ZnS-ZnO/graphene nano-photocatalysts was tested towards visible light driven photocatalytic degradation of environmentally harmful organic dyes and toxic phenol molecules from aqueous media. The presented cost-effective strategy provides high potential in large-scale production of heterostructured nano-photocatalysts for environmental remediation and photocatalytic greener production of hydrogen.

show abstract

Section: Resultsmentioning

confidence: 86%

Facile and scalable production of heterostructured ZnS-ZnO/Graphene nano-photocatalysts for environmental remediation

Lonkar

Pillai

Alhassan

2018

Sci Rep

119

View full text Add to dashboard Cite

show abstract

“…2d, indicating that the ZnS nanocrystals diameter is close to the excitation Bohr radius. 23 Final conrmation that the nanocrystals are indeed ZnS was provided from STEM-XEDS analysis which showed the presence of both Zn and S in individual particles, Fig. 2e.…”

Section: Resultsmentioning

confidence: 99%

Single enzyme direct biomineralization of ZnS, Zn_xCd_1−xS and Zn_xCd_1−xS–ZnS quantum confined nanocrystals

Sadeghnejad

Kiely

et al. 2017

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…Interestingly, Raman peaks associated with the chemical composite ZnS were also observed. Detailed description of ZnS Raman spectra could be found in the previous work [32]. Clearly, this component was from the interface where two types of materials in contact and chemical reaction to form a new composite would be further enhanced during annealing.…”

Section: Resultsmentioning

confidence: 99%

Two-Step Facile Preparation of 2D MoS2/ZnO Nanocomposite $p$ - $n$ Junctions with Enhanced Photoelectric Performance

Aldalbahi

Wang

Ahamad

et al. 2021

International Journal of Photoenergy

View full text Add to dashboard Cite

Both p - n and n - p heterojunctions of ZnO-MoS2 have been fabricated in order to understand the performance of electron and hole transport properties in solar cells and a self-powered photodetector system. Atomically thin 2-dimensional (2D) MoS2 was prepared by using a spin coating method with controlled process times, whereas ZnO nanowires were prepared by using a plasma sputtering deposition technique. The nanoscale morphologies, composites, and photoelectric properties of nanocomposites were examined using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and micro-Raman scattering spectroscopy, respectively. 2D heteronanostructures have exhibited an enhanced performance as compared to single-material-based prototypes. In photovoltaic mode, n - p heterojunction of the ZnO-MoS2-based prototype appears to have much better photoelectric conversion efficiency than that in the case with p - n junction, indicating highly effective hole transport properties of 2D MoS2 materials. Both band broadening and band shift were observed. Furthermore, the bias, annealing, and synergistic effects on the generated photocurrents and the response times were evaluated. The newly designed prototype exhibits exceptional properties: a broadband spectral response, a high signal-to-noise ratio, and excellent stability.

show abstract

Raman spectroscopy of ZnS quantum dots

Cited by 60 publications

References 34 publications

Facile and scalable production of heterostructured ZnS-ZnO/Graphene nano-photocatalysts for environmental remediation

Facile and scalable production of heterostructured ZnS-ZnO/Graphene nano-photocatalysts for environmental remediation

Single enzyme direct biomineralization of ZnS, Zn_xCd_1−xS and Zn_xCd_1−xS–ZnS quantum confined nanocrystals

Two-Step Facile Preparation of 2D MoS2/ZnO Nanocomposite $p$ - $n$ Junctions with Enhanced Photoelectric Performance

Contact Info

Product

Resources

About

Raman spectroscopy of ZnS quantum dots

Cited by 60 publications

References 34 publications

Facile and scalable production of heterostructured ZnS-ZnO/Graphene nano-photocatalysts for environmental remediation

Facile and scalable production of heterostructured ZnS-ZnO/Graphene nano-photocatalysts for environmental remediation

Single enzyme direct biomineralization of ZnS, ZnxCd1−xS and ZnxCd1−xS–ZnS quantum confined nanocrystals

Two-Step Facile Preparation of 2D MoS2/ZnO Nanocomposite p - n Junctions with Enhanced Photoelectric Performance

Contact Info

Product

Resources

About

Single enzyme direct biomineralization of ZnS, Zn_xCd_1−xS and Zn_xCd_1−xS–ZnS quantum confined nanocrystals

Two-Step Facile Preparation of 2D MoS2/ZnO Nanocomposite $p$ - $n$ Junctions with Enhanced Photoelectric Performance