Assessment of Cadmium Sulfide Nanoparticles Synthesis by Cadmium-Tolerant Fungi

Loa, José Daniel Aguilar; Castellanos-Angeles, Abril; García-Tejeda, Luis Ángel; Rivas-Castillo, Andrea M.; Rojas-Avelizapa, Norma G.

doi:10.1007/978-3-030-82064-0_12

“…In addition, particles greater than 200 nm were also observed with a frequency higher than 20% in both culture media. It can be due to the presence of NPs clusters [22] and traces of organic material from the biomass, which is supported by the analysis of CdS-NPs at pH 5.5 by Z potential, suggesting the presence of colloidal instability of CdS-NPs MGYP and CdS-NPs DS samples which values were of 13.2 ± 1.0 mV and 9.0 ± 1.0 mV, respectively [32], [33]. [4], [34].…”

Section: Morphological Characterization Of the Cds-npsmentioning

confidence: 90%

“…The size, structure and composition of the CdS-NPs were analyzed by high-resolution transmission electron microscopy (HRTEM) and EDX spectroscopy on a JEOL microscope, JEM-ARM200F. The polydispersity index, hydrodynamic radius, and Z-potential of the CdS-NPs were analyzed by dynamic light scattering (DLS) ina Litesizer 500 analyzer, Anton Paar [22].…”

Section: Physicochemical Characterization Of Cds-npsmentioning

confidence: 99%

Evaluation of the Culture Medium in the Synthesis of Cadmium Sulfide Nanoparticles by the Fungus Fusarium Oxysporum

Loa¹,

Pichardo‐Molina²,

Calvo-Olvera³

et al. 2022

IJTAN

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Fusarium oxysporum f. sp. lycopersici is a species reported to synthesize silver, gold, and cadmium nanoparticles when using biomass; it can produce and secrete many secondary metabolites hydrolytic enzymes involved in nanoparticle synthesis processes. However, the production of these components depends on the substrate where the fungus grows. The present work aims to evaluate the effect of the growth medium of Fusarium oxysporum in the synthesis of cadmium sulfide nanoparticles (CdS-NPs). The fungal biomass was obtained from a growth medium with nitrogenous components of higher and lower complexity (MGYP and DS respectively) and used for the synthesis of CdS-NPs using cadmium nitrate (Cd (NO3)2*4H2O) and elemental sulfur (S°). CdS-NPs exhibit two absorbance bands at 320 and 450 nm, with a fluorescence emission at 520 nm when excited with a wavelength at 365 nm. Transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction confirmed the presence of CdS-NPs with a mean diameter of 4.7 ± 0.7 and 4.9 ± 0.9 nm when MGYP and S media were used for biomass production, as well as atomic columns of CdS-NPs with A similar crystalline structure. However, it was also possible to appreciate fewer CdS-NPs when using the fungal biomass obtained from DS medium, which was confirmed by spectrophotometry through the absorption and emission bands at 450 and 520 nm.

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“…In addition, particles greater than 200 nm were also observed with a frequency higher than 20% in both culture media. It can be due to the presence of NPs clusters [22] and traces of organic material from the biomass, which is supported by the analysis of CdS-NPs at pH 5.5 by Z potential, suggesting the presence of colloidal instability of CdS-NPs MGYP and CdS-NPs DS samples which values were of 13.2 ± 1.0 mV and 9.0 ± 1.0 mV, respectively [32], [33].…”

Section: Morphological Characterization Of the Cds-npsmentioning

confidence: 94%

“…The size, structure and composition of the CdS-NPs were determined by highresolution transmission electron microscopy (HRTEM) and EDX spectroscopy on a JEOL microscope, JEM-ARM200F. The polydispersity index, hydrodynamic radius, and Z-potential of the CdS-NPs were analyzed by dynamic light scattering (DLS) ina Litesizer 500 analyzer, Anton Paar [22].…”

Section: Physicochemical Characterization Of Cds-npsmentioning

confidence: 99%

Effect of Growth Medium of Fusarium Oxysporum in the Synthesis of Cadmium Sulfide Nanoparticles

Loa¹,

Pichardo-Molina²,

Calvo-Olvera³

et al. 2022

Proceedings of the 8th World Congress on New Technologies

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Fusarium oxysporum f. sp. lycopersici is a species reported to synthesize silver, gold, and cadmium nanoparticles when using biomass; it can produce and secrete many secondary metabolites hydrolytic enzymes involved in nanoparticle synthesis processes. However, the production of these components depends on the substrate where the fungus grows. The present work aims to evaluate the effect of the growth medium of Fusarium oxysporum in the synthesis of cadmium sulfide nanoparticles (CdS-NPs). The fungal biomass was obtained from a growth medium with nitrogenous components of higher and lower complexity (MGYP and DS respectively) and used for the synthesis of CdS-NPs using cadmium nitrate (Cd (NO3)2*4H2O) and elemental sulfur (S°). CdS-NPs exhibit two absorbance bands at 320 and 450 nm, with a fluorescence emission at 520 nm when excited with a wavelength at 365 nm. Transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction confirmed the presence of CdS-NPs with a mean diameter of 4.7 ± 0.7 and 4.9 ± 0.9 nm when MGYP and S media were used for biomass production, as well as atomic columns of CdS-NPs with A similar crystalline structure. However, it was also possible to appreciate fewer CdS-NPs when using the fungal biomass obtained from DS medium, which was confirmed by spectrophotometry through the absorption and emission bands at 450 and 520 nm.

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