Synthesis and Characterization of Cd_1-xZn_xS (x=0-1) Nanoparticles by Thermal Decomposition of Bis(thiourea)cadmium-zinc acetate Complexes

Abstract

The present study reports synthesis of a complete series of Cd1‐xZnxS solid solution nanoparticles (x=0‐1) via thermal decomposition of bis(thiourea)cadmium‐zinc acetate complexes. First, bis(thiourea)cadmium‐zinc acetate complexes were synthesized which were then decomposed at 200 °C for 1 h in diphenyl ether. The bis(thiourea)cadmium‐zinc acetate complexes and Cd1‐xZnxS nanoparticles were characterized using different analytical techniques. The crystallite size of Cd1‐xZnxS nanoparticles varies from 2.1 nm to 4.8 nm and the phase changes from hexagonal to cubic with an increase in zinc content. The optical properties of Cd1‐xZnxS solid solution nanoparticles depend on composition and the band gap varies from 2.37 eV to 3.69 eV with an increase in the concentration of zinc. Photoluminescence spectral studies indicate shift of excitonic emission peaks towards lower wavelength (465 nm – 503 nm) compared to pure CdS nanoparticles (505 nm) with increasing zinc content in the Cd1‐xZnxS nanoparticles. The Cd1‐xZnxS nanoparticles were explored as catalysts for the photodegradation of methylene blue in an aqueous solution under sunlight.

Novel Thermal Decomposition Method for the Synthesis of Iron‐doped SnS2 Nanoparticles and Studies on their Peroxidase‐like Activity

“…The IR spectra of pure SnS 2 and the doped samples show bands at about 3350, 3147 and 1617 cm −1 , attributed to asymmetric and symmetric hydroxyl stretching and bending vibration, respectively which indicate that physisorbed water molecules are present in iron doped SnS 2 nanoparticles [34,46] . The IR band observed at about 1516 cm −1 is due to asymmetric stretching of C−N (ν C‐N ) and the bands at about 1268 and 790 cm −1 are ascribed to asymmetric stretching (ν C‐S ) and bending vibration (δ C‐S ) of C−S, respectively [34,47] . The IR band attributed to bending vibration of C−H group (δ C‐H ) is observed at about 1392 cm −1 .…”

“…[34,46] The IR band observed at about 1516 cm À 1 is due to asymmetric stretching of CÀ N (ν C-N ) and the bands at about 1268 and 790 cm À 1 are ascribed to asymmetric stretching (ν C-S ) and bending vibration (δ C-S ) of CÀ S, respectively. [34,47] The IR band attributed to bending vibration of CÀ H group (δ C-H ) is observed at about 1392 cm À 1 . These IR bands are attributed to thiocyanates and HCNS which are present on the surface of Sn 1-x Fe x S 2 nanoparticles.…”

Synthesis of Zn2TiO4@CdS Core‐shell Heteronanostructures by Novel Thermal Decomposition Approach for Photocatalytic Application

“…CHNS analysis of the cadmium complex yields 14.8% N, 18.6% C, 3.1% H and 16.5% S, which is in good agreement with the expected values (14.6% N, 18.8% C, 2.6% H and 16.7% S). TGA pattern of the cadmium complex (Figure S2) shows a first weight loss of ∼53% due to decomposition of the complex in the temperature range of 140–250 °C . The second weight loss (∼ 13%) observed in the range of 250–560 °C is attributed to partial oxidation of CdS to CdS.CdO.…”

“…TGA pattern of the cadmium complex ( Figure S2) shows a first weight loss of ∼ 53% due to decomposition of the complex in the temperature range of 140-250°C. [36] The second weight loss (∼ 13%) observed in the range of 250-560°C is attributed to partial oxidation of CdS to CdS.CdO. The third step with weight gain (∼ 1.7%) from 580 to 620°C is attributed to partial oxidation of CdS to CdS.CdSO 4 .…”

Role of Alkylamines in Tuning the Morphology and Optical Properties of SnS2 Nanoparticles Synthesized by via Facile Thermal Decomposition Approach

“…Morphology-dependent studies on nanomaterials have revealed that the same material with different morphologies exhibits significantly different properties [12,13]. Research is being conducted in this direction to tune the morphology and surface characteristics by chemical methods.…”