Synthesis of ZnO-TiO<sub>2</sub>/Chitosan Nanorods By Using Precipitation Methods and Studying Their Structures and Optics Properties at Different Precursor Molar Compositions

Rilda, Yetria; Damara, Doni; Syukri,; Putri, Yulia Eka; Refinel,; Agustien, Anthoni

doi:10.1088/1755-1315/217/1/012015

“…When correlated with the XRD spectrum in Fig. 3, the biosynthesis at pH = 13.0 was indicated by the new intensity of hydrated Zn-O, at 2θ = 29.37° [23,27,29].…”

Section: Analysis Of Fourier Transform Infra Red (Ft-ir)mentioning

confidence: 72%

“…This study also focuses on the biosynthesis of ZnO based on the pH difference of the reactants, in order to optimize the function of intracellular enzymes towards the reduction of Zn 2+ to Zn 0 and other stabilizers in crystal formation. The pH parameter controls the optimization of ZnO, based on the hydrolysis of the Zn(NO 3 ) 2 precursor, formation of the Zn(OH) 2 precipitate core, and stability of crystal growth with controlled dimensions and morphology [29]. Therefore, the ZnO synthesis using microbial cells provide an opportunity to explore its morphology, dimensions, and related properties, towards the utilization in environmental applications.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of Zinc Oxide (ZnO) Using Culture Biomass of Aspergillus Niger : The Influence of pH On Textile Morphology And Antimicrobial Activity

Rilda

¹

,

Rinaldi

²

,

Syukri

³

et al. 2021

Preprint

0

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The biosynthesis of zinc oxide (ZnO) is performed through enzymatic mechanisms, by controlling the particle size and morphology of the compound using the sol-gel method. Furthermore, this method utilizes stabilizer obtained from the cell biomass of Aspergillus niger bacteria, in order to yield homogeneous and consistent products, which corresponds with the XRD outcome that exhibits good crystallinity. The evaluation of functional, morphological, and antibacterial activities was carried out at pH 6.0-13.0, as the prepared samples were characterized by FT-IR. The analysis showed the interaction of hydroxyl groups, aromatic rings, as well as N-H and O-Zn-O compounds at a wavenumber of 401-584 cm−1. The XRD and SEM characterizations showed that the structure and crystal phase of ZnO were hexagonal wurtzite at dimensions of 36.2 - 45.4 nm. The differences in pH also influenced the dimensions, morphology, and antimicrobial activity. ZnO with pH of 8.0 was characterized by FESEM-EDAX, based on the analysis of morphological uniformity. This characterization obtained rod and cube structures, with atomic ratios of Zn = 61.5% and O = 38.5%. The UV-DRS spectrum showed that the optical band gap was not significantly influenced by the pH of the reactant solution, with a value of Eg = 3.00–3.11 eV. The differences in morphology further distinguished anti-bacterial properties on textile fibres, through the use of the Gram-negative and positive bacteria (Pseudomonas aeruginosa and Staphylococcus aureus), with inhibition zones of 17-21 mm and 21-25 mm, respectively. Therefore, ZnO is classified as a very strong antibacterial material compared to amoxicillin, with an inhibition zone of 13.6 mm.

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“…When correlated with the XRD spectrum in Fig. 2, the biosynthesis at pH = 13.0 was indicated by the new intensity of hydrated Zn-O, at 2θ = 29.37° [23,27,29].…”

Section: Analysis Of Fourier Transform Infra Red (Ft-ir)mentioning

confidence: 73%

Biosynthesis of Zinc Oxide (ZnO) Using Culture Biomass of Aspergillus Niger :The Influence of pH On Textile Morphology And Antimicrobial Activity

Rilda

¹

,

Rinaldi

²

,

Syukri

³

et al. 2021

Preprint

0

View full text Add to dashboard Cite

The biosynthesis of zinc oxide (ZnO) is performed through enzymatic mechanisms, by controlling the particle size and morphology of the compound using the sol-gel method. Furthermore, this method utilizes stabilizer obtained from the cell biomass of Aspergillus niger bacteria, in order to yield homogeneous and consistent products, which corresponds with the XRD outcome that exhibits good crystallinity. The evaluation of functional, morphological, and antibacterial activities was carried out at pH 6.0-13.0, as the prepared samples were characterized by FT-IR. The analysis showed the interaction of hydroxyl groups, aromatic rings, as well as N-H and O-Zn-O compounds at a wavenumber of 401-584 cm−1. The XRD and SEM characterizations showed that the structure and crystal phase of ZnO were hexagonal wurtzite at dimensions of 36.2 - 45.4 nm. The differences in pH also influenced the dimensions, morphology, and antimicrobial activity. ZnO with pH of 8.0 was characterized by FESEM-EDAX, based on the analysis of morphological uniformity. This characterization obtained rod and cube structures, with atomic ratios of Zn = 61.5% and O = 38.5%. The UV-DRS spectrum showed that the optical band gap was not significantly influenced by the pH of the reactant solution, with a value of Eg = 3.00–3.11 eV. The differences in morphology further distinguished anti-bacterial properties on textile fibres, through the use of the Gram-negative and positive bacteria (Pseudomonas aeruginosa and Staphylococcus aureus), with inhibition zones of 17-21 mm and 21-25 mm, respectively. Therefore, ZnO is classified as a very strong antibacterial material compared to amoxicillin, with an inhibition zone of 13.6 mm.

show abstract

“…The stability for crystal growth in the presence of a reducing and capping agent substitution of intracellular enzymes in A. niger fungus and then forming a coordination molecule [Zn(OH) 2 (NH 3 ) 4 ] which is the core development. The stability of crystal growth with controlled of temperature calcination [29] …”

Section: Resultsmentioning

confidence: 99%

“…The mechanism of ZnO biosynthesis based on the intracellular form of A. niger cell is shown in the reaction cycle in Figure 1 [27,28] . This study also discusses the effect of the pH parameter of biosynthetic media in optimizing the function of intracellular enzymes based on hydrolysis and condensation from the sol‐gel method to control the stability of the growth of crystal nuclei with homogeneous morphology of ZnO [29] . Therefore, the ZnO synthesis method using A. niger provides an opportunity to explore the morphology, dimensions, and antimicrobial properties that are more economical for the application of antimicrobial textiles on an industrial scale [30,31,32] …”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of Zinc Oxide (ZnO) Using the Biomass of Aspergillus niger to Impart Cotton Fabric with Antimicrobial Properties

Rilda

¹

,

Rinaldi

²

,

Syukri

³

et al. 2022

View full text Add to dashboard Cite

The biosynthesis of ZnO is performed through enzymatic mechanisms for controlling the particle size and morphology with using the sol‐gel method. Furthermore, this method utilizes a stabilizer obtained from the cell biomass of Aspergillus niger mold in order to yield homogeneous and consistent products. The evaluation of functional, morphological, and antibacterial activities was carried out at pH 6.0‐13.0. The analysis FT‐IR showed the interaction of hydroxyl groups, aromatic rings, as well as N−H and O−Zn‐O compounds at a wavenumber of 401–584 cm−1. The XRD and SEM characterizations showed that ZnO structure and crystal phase were hexagonal wurtzite at dimensions of 36.2 ‐ 45.4 nm. The differences in pH also influenced the dimensions, morphology, and antimicrobial activity. ZnO with a pH of 8.0 was characterized by FESEM‐EDAX, based on the analysis of morphological uniformity. This characterization obtained rod and cube structures, with atomic ratios of Zn=61.5 % and O=38.5 %. The UV‐DRS spectrum showed that the optical band gap with a value of Eg=3.00–3.11 eV. The differences in morphology further distinguished antibacterial properties on textile fibers, through the use of the Gram ‐ and + bacteria (Pseudomonas aeruginosa and Staphylococcus aureus), with inhibition zones of 17–21 mm and 21–25 mm, respectively. Therefore, ZnO is classified as a very strong antibacterial material than amoxicillin, with an inhibition zone of 13.6 mm.

show abstract

Synthesis of ZnO-TiO₂/Chitosan Nanorods By Using Precipitation Methods and Studying Their Structures and Optics Properties at Different Precursor Molar Compositions

Cited by 12 publications

References 15 publications

Biosynthesis of Zinc Oxide (ZnO) Using Culture Biomass of Aspergillus Niger : The Influence of pH On Textile Morphology And Antimicrobial Activity

Biosynthesis of Zinc Oxide (ZnO) Using Culture Biomass of Aspergillus Niger : The Influence of pH On Textile Morphology And Antimicrobial Activity

Biosynthesis of Zinc Oxide (ZnO) Using Culture Biomass of Aspergillus Niger :The Influence of pH On Textile Morphology And Antimicrobial Activity

Biosynthesis of Zinc Oxide (ZnO) Using the Biomass of Aspergillus niger to Impart Cotton Fabric with Antimicrobial Properties

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Synthesis of ZnO-TiO2/Chitosan Nanorods By Using Precipitation Methods and Studying Their Structures and Optics Properties at Different Precursor Molar Compositions

Cited by 12 publications

References 15 publications

Biosynthesis of Zinc Oxide (ZnO) Using Culture Biomass of Aspergillus Niger : The Influence of pH On Textile Morphology And Antimicrobial Activity

Biosynthesis of Zinc Oxide (ZnO) Using Culture Biomass of Aspergillus Niger : The Influence of pH On Textile Morphology And Antimicrobial Activity

Biosynthesis of Zinc Oxide (ZnO) Using Culture Biomass of Aspergillus Niger :The Influence of pH On Textile Morphology And Antimicrobial Activity

Biosynthesis of Zinc Oxide (ZnO) Using the Biomass of Aspergillus niger to Impart Cotton Fabric with Antimicrobial Properties

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Synthesis of ZnO-TiO₂/Chitosan Nanorods By Using Precipitation Methods and Studying Their Structures and Optics Properties at Different Precursor Molar Compositions