Dielectric and Conductivity Relaxation of rGO@CdS Nanocomposites via In Situ Assembly of CdS Nanoparticles on an rGO Layer

2020 ◽  
Vol 124 (45) ◽  
pp. 25133-25141
Author(s):  
Ligang Ma ◽  
Xiaoqian Ai ◽  
Xingming Yang ◽  
Xiang Song ◽  
Xiaoshan Wu
Keyword(s):  
Cds Nanoparticles ◽  
Conductivity Relaxation ◽  
Cds Nanocomposites

In situ synthesis of CdS nanoparticles on multi-walled carbon nanotubes

Carbon ◽  
2004 ◽  
Vol 42 (2) ◽  
pp. 455-458 ◽  
Author(s):  
Jiahua Shi ◽  
Yujun Qin ◽  
Wei Wu ◽  
Xianglong Li ◽  
Zhi-Xin Guo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
In Situ Synthesis ◽  
Cds Nanoparticles ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In-situ pulsed laser induced growth of CdS nanoparticles on ZnO nanorods surfaces

2020 ◽  
Vol 125 ◽  
pp. 110790
Author(s):  
Y. Rodríguez-Martínez ◽  
J. Alba-Cabañas ◽  
O. Cruzata ◽  
S. Bianco ◽  
E. Tresso ◽  
...  
Keyword(s):  
Zno Nanorods ◽  
Pulsed Laser ◽  
Cds Nanoparticles

Silica Encapsulated CdS Tabular Nanocomposites via a Template Directed Agglomeration Mechanism

2008 ◽  
Vol 8 (11) ◽  
pp. 5878-5886 ◽  
Author(s):  
Jun Wang ◽  
Stephen J. Sollenberger ◽  
Ying Yuan ◽  
Timothy J. Yosenick ◽  
James H. Adair
Keyword(s):  
Electron Microscope ◽  
High Resolution ◽  
Coating Layer ◽  
Layer Growth ◽  
Cds Nanoparticles ◽  
Atomic Force ◽  
Transmission Electron ◽  
Potential Applications ◽  
Hydrolysis Of

Silica coated CdS tabular nanocomposites were synthesized through precipitation of CdS nanoparticles in octylamine/water bilayer system followed by in situ hydrolysis of tetraethoxylsilicate (TEOS) precursor. Face diameter of the nanoplatelets was in the range of 50∼250 nm with a variable thickness (3 to 25 nm) dictated by octylamine content or R ratio ([water]/[octylamine]). A uniform SiO2 outer shell of about 15 nm was observed regardless of the size of the high aspect ratio CdS nanoplatelets, which appeared to be agglomerated primarily owing to the confined bilayer template. Morphology and microstructure of the CdS/SiO2 tabular nanocomposites were characterized using atomic force microscope (AFM) and high resolution transmission electron microscope (HRTEM). A noticeable enhancement in absorbance for the UV-vis spectra was observed due to the SiO2 coating layer. Growth mechanism of nanocomposite platelets and potential applications associated with this anisotropic nanocomposite are discussed.

Fabrication of Microcrystalline Cellulose/CdS Nanocomposites and their Photocatalytic Properties

2013 ◽  
Vol 634-638 ◽  
pp. 2475-2480
Author(s):  
Ai Min Tang ◽  
Ting Ting Hu ◽  
Xia Su
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Microcrystalline Cellulose ◽  
Uv Light ◽  
Absorption Spectrometry ◽  
Cds Nanoparticles ◽  
Ultrasound Wave ◽  
Transmission Electron ◽  
Initial Ph ◽  
Cds Nanocomposites

Microcrystalline cellulose (MCC)/cadmium sulfide (CdS) nanocomposites were prepared by using ultrasound wave irradiation. The as-prepared samples were characterized using scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS), atomic absorption spectrometry (AAS), transmission electron microscopy (TEM). The photocatalytic behavior of MCC/CdS nanocomposites was evaluated using the degradation of a methyl orange (MeO) aqueous solution under ultraviolet (UV) light irradiation. Results showed that CdS nanoparticles were evenly distributed on the surface of MCC with little aggregation; the amount of Cd attached to the MCC was 23.75 % (w/w, Cd/composites). The MeO degradation rate was much higher when the MCC/CdS nanocomposites were irradiated with UV light than when CdS powder alone was irradiated. In dark conditions, the MCC/CdS nanocomposites showed almost no photocatalytic activity. In addition, the amount of MCC/CdS nanocomposites added to MeO solution and the initial pH of the MeO solution were also important factors influencing the photocatalytic activity. The results show that MCC/CdS nanocomposites are promising materials with excellent performance in photocatalytic applications.

Synthesis and optical properties of PVC-CdS-based nanocomposites

2019 ◽  
Vol 52 (2) ◽  
pp. 159-166 ◽  
Author(s):  
MA Ramazanov ◽  
FV Hajiyeva ◽  
YA Babayev ◽  
GV Valadova ◽  
SG Nuriyeva ◽  
...  
Keyword(s):  
Blue Shift ◽  
Uv Spectra ◽  
Nanocomposite Films ◽  
Ex Situ ◽  
Cds Nanoparticles ◽  
Casting Method ◽  
Poly Vinyl Chloride ◽  
Solution Casting Method ◽  
Uv Visible ◽  
Cds Nanocomposites

Poly(vinyl chloride) (PVC)–cadmium sulfide (CdS) nanocomposite films were successfully synthesized by ex situ solution casting method. Scanning electron microscopy showed that CdS nanoparticles are well monodispersed in the PVC matrix. From the ultraviolet (UV) spectra of nanocomposites, the width of the forbidden band for polymer nanocomposites was determined by extrapolation method. UV-visible optical spectra revealed that the optical band of nanocomposites is increased with increasing concentration of CdS nanoparticles in the PVC matrix. It was found that the band gap is 3.8 eV for PVC-3% CdS nanocomposites, 2.7 eV for PVC-5% CdS, and 2.35 eV for PVC-10% CdS nanocomposites. Photoluminescence spectrum of PVC-CdS-based nanocomposites shows two luminescent peaks at the wavelengths of 436 nm and 472 nm at the luminescence spectrum which belongs to CdS nanoparticles. Photoluminescence study shows that PVC-CdS nanocomposites exhibit a great blue shift (approximately 100 nm) compared with bulk CdS nanoparticles.

Sol-Gel Elaboration and Optical Features of Eu3+-Doped CdS Nanocrystals in SiO2

2007 ◽  
Vol 555 ◽  
pp. 389-393 ◽  
Author(s):  
B. Julián ◽  
J. Planelles ◽  
E. Cordoncillo ◽  
P. Escribano ◽  
C. Sanchez ◽  
...  
Keyword(s):  
Sol Gel ◽  
Silica Matrix ◽  
Cds Nanoparticles ◽  
Rare Earth Ion ◽  
Sio2 Matrix ◽  
Chemical Homogeneity ◽  
Synthesis Conditions ◽  
Cds Nanocrystals ◽  
Back Transfer

In this work, Eu3+-doped CdS nanocrystals embedded in a SiO2 matrix were synthesised by a sol-gel method since this method confers a great chemical homogeneity, and allows in-situ generation and controlled growth of CdS nanocrystals within the silica glass. The influence of the sol-gel conditions on the Eu3+ optical response has been investigated. The synthesis conditions can be varied to modify the structure of the material, and the dispersion of the rare earth ion, within the silica matrix. From the optical analysis an energy transfer appears from CdS nanoparticles to Eu3+ ions but also a back transfer Eu3+ to CdS nanoparticles is evidenced.

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