Structural, optical and thermal properties of CdS/Bi2S3 nanocomposites

Abstract

High-quality crystalline CdS/Bi 2 S 3 core-shell nanoparticles were synthesized by a simple chemical method in air. X-ray diffraction results showed that the CdS/Bi 2 S 3 nanocomposite was a mixture of cubic and orthorhombic structures. The photoluminescence properties of the CdS/Bi 2 S 3 core-shell nanocomposites were improved with respect to the Bi 2 S 3 shell thickness. High-resolution transmission electron microscopic image of the CdS/Bi 2 S 3 confirmed the formation of core-shell structure. Enhanced photoluminescence emission was obtained in the red region for the CdS/Bi 2 S 3 core-shell nanoparticles, which was entirely different from the ideal CdS and Bi 2 S 3 compound. Also, well-crystallized CdO/Bi 2 O 3 composite was thermally prepared by oxidation of CdS/Bi 2 S 3 in air.

Tuning visible emission of core-shell nanostructure by exchange the inner and outer layer

“…The diffraction peaks for Bi 2 S 3 observed at 22.38°, 23.112°, 25.83°, 26.05°, 29.75°, 33.04°,34.02°, 35.21°, 38.24°, 43.82°, 48.72°, 54.21 and 67.62° with corresponds to (1 1 0), (0 0 2), (2 1 0), (2 2 0), (2 0 0), (1 3 2), (3 1 2), (1 1 2), (0 1 2), (0 3 4), (1 2 3), (0 3 2) and (1 7 2) planes, respectively. The all the strong diffraction peaks are confirmed that orthorhombic crystal structure of Bi 2 S 3 [43]. No impurity peaks were detected for both samples indicating that core-shell nanoparticles are only composed of ZnS and Bi 2 S 3 phases.…”

Microwave-Assisted Synthesis of Bi2S3 and Sb2S3 Nanoparticles and Their Photoelectrochemical Properties

“…The spectrum of Bi 2 S 3 nanoparticles (Figure 5a) showed a narrow emission peak at 358 nm and a small peak at 723 nm. The strong emission is ascribed to the recombination of trapped electron−hole pairs inside a sulfur vacancy in the valence band of the Bi 2 S 3 nanoparticles, 42 while the lowerintensity peak may be ascribed to stoichiometric deviation in the nanoparticles. Figure 5b presents the PL spectrum of Sb 2 S 3 with a narrow emission at 573 nm.…”

Facile synthesis of heterostructure CeO2/CdS and CdS/CeO2 nanocomposites for photocatalytic application of methylene blue textile dye

“…However, the utility of alone CdS has been limited due to its anodic decomposition (photocorrosion) [8]. Recently, the optical, catalytic and electrical properties of CdS have been modified by adding suitable rare earth metal or metal oxides, [5][6][7][8][9][10][11][12] but investigations of CdS with rare-earth oxides heterostructures are limited. Thus, it is highly desirable to investigate the properties of CdS with rare earth oxide heterostructures for diverse applications.…”