Structural tuning of CdS nanoparticles with nucleation temperature and its reflection on the optical properties

Mohamed, Mohamed Bakr; Imam, N.G.

doi:10.1016/j.molstruc.2015.04.003

Cited by 40 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These bands come from the C-H Fourier transform infrared (FT-IR) spectroscopy was conducted to investigate the chemical structure of CdS-PVP, 0.1C/CdS-PVP, and HTCC ( Figure 2). For CdS-PVP and 0.1C/CdS-PVP samples, the weak band around 565 cm −1 indicates -CS 2 wagging (Cd-S stretching) [20]. The bands at 1375 and 1450 cm −1 can be attributed to the Cd-S bonding [21].…”

Section: Resultsmentioning

confidence: 98%

Hydrothermal Carbonation Carbon-Coated CdS Nanocomposite with Enhanced Photocatalytic Activity and Stability

Zhao

Shen

et al. 2017

Catalysts

View full text Add to dashboard Cite

Herein, a novel CdS nanocomposite is fabricated by a facile one-pot hydrothermal method assisted by glucose and polyvinylpyrrolidone (PVP). The as-prepared CdS is coated with a thin layer, which is determined to be hydrothermal carbonation carbon (HTCC) mainly containing semiconductive polyfuran. The as-prepared HTCC-coated CdS shows superior photocatalytic activity for the degradation of Rhodamine B (RhB) under visible light irradiation (λ ≥ 420 nm). The optimum sample (glucose content of 0.1 g) shows a degradation rate four-times that of pure CdS reference. Moreover, it also shows an improved stability, and the activity can be maintained at 96.2% after three cycles of recycling. The enhanced photocatalytic activity and stability of nanocomposite can mainly be attributed to: (i) The addition of PVP in the reaction solution can significantly increase the specific surface area of CdS and thus offer more active sites. (ii) The HTCC in the nanocomposite can expand the range of light absorption. (iii) The HTCC layer can form a heterojunction with CdS and improve the charge separation and transfer.

show abstract

Section: Resultsmentioning

confidence: 98%

Hydrothermal Carbonation Carbon-Coated CdS Nanocomposite with Enhanced Photocatalytic Activity and Stability

Zhao

Shen

et al. 2017

Catalysts

View full text Add to dashboard Cite

show abstract

“…The peak at 671 cm À1 is attributed to vibration of Cd-S bond. 32 This conrms the purity and air stability of the CdS sample. Fig.…”

Section: Vibrational Spectroscopymentioning

confidence: 99%

“…Photocatalytic degradation of organic pollutants, in general, obeys Langmuir-Hinshelwood (L-H) kinetics. 32 This kind of pseudo-rst order kinetics can be represented by the following equation:…”

Section: Photocatalytic Propertiesmentioning

confidence: 99%

“…The linear relationship between ln(C 0 /C) and time (t) was found in each plot indicating the pseudo-rst order kinetics of the photodegradation reaction. 19,32 The rate constant (k 1 ) was calculated from a slope of ln(C 0 /C) vs. time. The photodegradation of RR141 dye provided a rate constant of 0.0236 min À1 (R 2 ¼ 0.9705).…”

Section: Photocatalytic Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Hydrothermally grown CdS nanoparticles for photodegradation of anionic azo dyes under UV-visible light irradiation

2018

View full text Add to dashboard Cite

show abstract

“…1f shows the selected area electron diffraction (SAED) pattern, exhibiting broad diffused rings corresponding to (1 1 1), (2 2 0) and (3 1 1) planes that are typical of nanosized ZnSe particles with a cubic structure [20]. Factors, such as supersaturation, nucleation and growth rates, colloidal stability, recrystallization and aging processes, have considerable effect on the particle size and microstructure [21].…”

Section: Characterization Of Znse Nanocrystalsmentioning

confidence: 99%

Effect of nanocrystals concentration on optical and luminescent properties of PVK:ZnSe nanocomposites

Sharma

Kumar

Verma

2018

Materials Science-Poland

View full text Add to dashboard Cite

This work presents a systematic study of the effect of ZnSe nanocrystals (NCs) concentration on the optical and luminescent properties of poly N-vinylcarbazole (PVK) polymer nanocomposites. The ZnSe nanocrystals were synthesized by a simple coprecipitation chemical route, while PVK:ZnSe nanocomposite films were fabricated using the spin coating technique. The samples were characterized by XRD, TEM, SEM, UV-Vis and fluorescence techniques. The X-ray diffraction and TEM studies confirmed the particle size, microstructure and spherical shape of the synthesized nanocrystals. The ZnSe nanocrystals in PVK caused a decrease in optical gap with increasing concentration of nanocrystals. The emission spectra exhibited augmentation in intensity up to 70 wt.% of nanoparticles while further addition resulted in a decrease in luminescence. The structure-property relationships obtained for the present system are important for developing low cost illumination devices.

show abstract

Structural tuning of CdS nanoparticles with nucleation temperature and its reflection on the optical properties

Cited by 40 publications

References 25 publications

Hydrothermal Carbonation Carbon-Coated CdS Nanocomposite with Enhanced Photocatalytic Activity and Stability

Hydrothermal Carbonation Carbon-Coated CdS Nanocomposite with Enhanced Photocatalytic Activity and Stability

Hydrothermally grown CdS nanoparticles for photodegradation of anionic azo dyes under UV-visible light irradiation

Effect of nanocrystals concentration on optical and luminescent properties of PVK:ZnSe nanocomposites

Contact Info

Product

Resources

About