Pub Date : 2022-07-01DOI: 10.15251/jobm.2022.143.137
J. El Ghoul, N. Abdel All
We reported the synthesis of phosphorus doped ZnO nanoparticles for a concentration of P ranging from 2 to 8%by a sol–gel processing technique. The structural and optical properties of these nanoparticles were characterised by different techniques. The structural study confirms the presence of hexagonal wurtzite phase with average crystallite size around 30nm. However, the optical study was shown a high absorption in the UV range and an important reflectance in the visible range. The optical band gap of P-ZnO samples were varied between 3.32 and 3.28 eV. The aim of this work is to study the effect of phosphorus doping on the structural, morphological and optical properties of ZnO nanoparticles.
{"title":"Synthesis and characterizations of phosphorus doped ZnO nanoparticles","authors":"J. El Ghoul, N. Abdel All","doi":"10.15251/jobm.2022.143.137","DOIUrl":"https://doi.org/10.15251/jobm.2022.143.137","url":null,"abstract":"We reported the synthesis of phosphorus doped ZnO nanoparticles for a concentration of P ranging from 2 to 8%by a sol–gel processing technique. The structural and optical properties of these nanoparticles were characterised by different techniques. The structural study confirms the presence of hexagonal wurtzite phase with average crystallite size around 30nm. However, the optical study was shown a high absorption in the UV range and an important reflectance in the visible range. The optical band gap of P-ZnO samples were varied between 3.32 and 3.28 eV. The aim of this work is to study the effect of phosphorus doping on the structural, morphological and optical properties of ZnO nanoparticles.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43574009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-01DOI: 10.15251/jobm.2022.143.89
S. Pradeeba, K. Sampath
Water is a life-giving and energising substance. People all around the world are struggling due to the deficiency of fresh and hygienic potable water. Clean water is a significant resource for human civilization on Earth and one of the most crucial requirements for all living species to survive. Contamination of water due to synthetic dye is one of the most serious threats to human health. The photocatalystspoly(azomethine), ZnO, TiO2, poly(azomethine)/TiO2 and poly(azomethine)/ZnO were synthesized and used to remove cationic and anionic dyes from contaminated water.The band gap of photocatalysts, reaction kinetics, isotherm studies and thermodynamic studies were assessed and the photocatalytic studies revealed that polyazomethine/ZnO and polyazomethine/TiO2 nanocomposites had significantly higher photocatalytic activity and are more efficient at removing dyes from effluents than PAZ, ZnO, and TiO2 in natural sunlight.
{"title":"Photodegradation, thermodynamic and kinetic study of cationic and anionic dyes from effluents using polyazomethine/ZnO and polyazomethine/TiO2 nanocomposites","authors":"S. Pradeeba, K. Sampath","doi":"10.15251/jobm.2022.143.89","DOIUrl":"https://doi.org/10.15251/jobm.2022.143.89","url":null,"abstract":"Water is a life-giving and energising substance. People all around the world are struggling due to the deficiency of fresh and hygienic potable water. Clean water is a significant resource for human civilization on Earth and one of the most crucial requirements for all living species to survive. Contamination of water due to synthetic dye is one of the most serious threats to human health. The photocatalystspoly(azomethine), ZnO, TiO2, poly(azomethine)/TiO2 and poly(azomethine)/ZnO were synthesized and used to remove cationic and anionic dyes from contaminated water.The band gap of photocatalysts, reaction kinetics, isotherm studies and thermodynamic studies were assessed and the photocatalytic studies revealed that polyazomethine/ZnO and polyazomethine/TiO2 nanocomposites had significantly higher photocatalytic activity and are more efficient at removing dyes from effluents than PAZ, ZnO, and TiO2 in natural sunlight.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44609694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-01DOI: 10.15251/jobm.2022.143.129
N. Yaduvanshi
The present work reports the study of high field conduction in thin films of Se90Ge10-x Inx (x=2,6) because high field conduction in chalcogenide glasses is affected by the presence of localised states at the band edges as well as the defect states present in the mobility gap.To measure the density of states in these thin films , space charge limited conduction technique is used. I-V characteristics have been measured at various fixed temperatures. An ohmic behaviour is observed at low electric fields upto 102V/cm. Superohmic behaviour is observed at high electric fields (103 -104 V/cm).High field conduction theory of space charge limited conduction for uniform distribution of localised states in the mobility gap fits well with the experimental data.Using this theory, the density of defect states near Fermi level is calculated for all glassy alloys.
{"title":"Study of High field conduction in Se based Chalcogenide glasses","authors":"N. Yaduvanshi","doi":"10.15251/jobm.2022.143.129","DOIUrl":"https://doi.org/10.15251/jobm.2022.143.129","url":null,"abstract":"The present work reports the study of high field conduction in thin films of Se90Ge10-x Inx (x=2,6) because high field conduction in chalcogenide glasses is affected by the presence of localised states at the band edges as well as the defect states present in the mobility gap.To measure the density of states in these thin films , space charge limited conduction technique is used. I-V characteristics have been measured at various fixed temperatures. An ohmic behaviour is observed at low electric fields upto 102V/cm. Superohmic behaviour is observed at high electric fields (103 -104 V/cm).High field conduction theory of space charge limited conduction for uniform distribution of localised states in the mobility gap fits well with the experimental data.Using this theory, the density of defect states near Fermi level is calculated for all glassy alloys.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45495060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-01DOI: 10.15251/jobm.2022.143.77
E. Dhanasekaran, N. Sivakumar, N. Sriharan
Nanorod like structured bare Bi2O3 and Gd-doped Bi2O3 (Gd-Bi2O3) are synthesized by simple hydrothermal method. The crystal structure, compositions and surface morphology of the synthesized nanoparticles are characterized by X-ray powder diffraction (XRD), Scanning electron microscopy (SEM), Energy Dispersive X-ray spectroscopy (EDS) and UV-visible absorbance spectroscopy (UV). The photocatalytic efficiency of as synthesized samples is evaluated by degradation of aqueous solution of dyes from different classes under the pH = 4, 6, 8 in presence of UV light. Comparatively, Gd-Bi2O3 exhibits significant degradation of dye stuffs than bare Bi2O3. In our present study, the factors which are emphasis the photocatalytic activity of Gd-Bi2O3 and possible mechanism for photocatalytic degradation also narrated briefly.
{"title":"Enhanced photocatalytic degradation of Gd-doped Bi2O3 for selective dyes under UV light irradiation","authors":"E. Dhanasekaran, N. Sivakumar, N. Sriharan","doi":"10.15251/jobm.2022.143.77","DOIUrl":"https://doi.org/10.15251/jobm.2022.143.77","url":null,"abstract":"Nanorod like structured bare Bi2O3 and Gd-doped Bi2O3 (Gd-Bi2O3) are synthesized by simple hydrothermal method. The crystal structure, compositions and surface morphology of the synthesized nanoparticles are characterized by X-ray powder diffraction (XRD), Scanning electron microscopy (SEM), Energy Dispersive X-ray spectroscopy (EDS) and UV-visible absorbance spectroscopy (UV). The photocatalytic efficiency of as synthesized samples is evaluated by degradation of aqueous solution of dyes from different classes under the pH = 4, 6, 8 in presence of UV light. Comparatively, Gd-Bi2O3 exhibits significant degradation of dye stuffs than bare Bi2O3. In our present study, the factors which are emphasis the photocatalytic activity of Gd-Bi2O3 and possible mechanism for photocatalytic degradation also narrated briefly.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48712496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.15251/jobm.2022.142.35
S. Florence, C. Manna, K. Prabha, M. Bakri, R. A. Hagazy, M. Sowjanya, M. Shariq
The crystalline structure and morphology of semiconductor nanoparticles are important factors for determining their optical properties. To synthesis such nanoparticles, green synthesis is one of the most popular methods. In these green synthesis procedures, the plant extracts can be added to control the growth and particle size. In this present work, ZnO nanoflakes are synthesized in a cost-effective green synthsis method using pandamus tecctorius leaf extract. The structure and morphology of as synthesized ZnO nanoflakes have been characterized by X-ray diffraction (XRD), Raman Spectroscopy, scanning electron microscopy (SEM), photoluminescence (PL) spectrophotometry and transmission electron microscopy (TEM). The SEM and TEM images reveal the formation of ZnO nanoflakes. The hexagonal wurtzite structure has been predicted from XRD results. Strong blue absorption and the enhanced luminescence property with respect to bulk have been observed from PL studies.
{"title":"Antibacterial activity of biosynthesized ZnO nanoflakes using Pandanus tectorius leaf extracts","authors":"S. Florence, C. Manna, K. Prabha, M. Bakri, R. A. Hagazy, M. Sowjanya, M. Shariq","doi":"10.15251/jobm.2022.142.35","DOIUrl":"https://doi.org/10.15251/jobm.2022.142.35","url":null,"abstract":"The crystalline structure and morphology of semiconductor nanoparticles are important factors for determining their optical properties. To synthesis such nanoparticles, green synthesis is one of the most popular methods. In these green synthesis procedures, the plant extracts can be added to control the growth and particle size. In this present work, ZnO nanoflakes are synthesized in a cost-effective green synthsis method using pandamus tecctorius leaf extract. The structure and morphology of as synthesized ZnO nanoflakes have been characterized by X-ray diffraction (XRD), Raman Spectroscopy, scanning electron microscopy (SEM), photoluminescence (PL) spectrophotometry and transmission electron microscopy (TEM). The SEM and TEM images reveal the formation of ZnO nanoflakes. The hexagonal wurtzite structure has been predicted from XRD results. Strong blue absorption and the enhanced luminescence property with respect to bulk have been observed from PL studies.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47120791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.15251/jobm.2022.142.53
H. Idriss, M. Habib, A. Alakhras, H. M. El Khair
A pandemic of coronavirus infection is causing a significant public health hazard globally, putting millions of people at risk in an increasing amount of countries. Nanostructured materials have been recognized to be highly efficient against coronaviruses. ZnO nanoparticles possess unique features that enable to act as anti-bacterial and anti-viral. Hence, the aim of the current investigation is to produce zinc oxide nanoparticles and utilized as surface coating materials against COVID-19. Thermal decomposition has been utilized in this investigation to fabricate ZnO nanoparticles with crystallite of 41 and 55 nm. The study outcomes demonstrated that Zinc nanoparticles is a favorable material for future usage as an anti-coronavirus surface due to their ecologically friendly features and exceptional physical and chemical functionality.
{"title":"ZnO nanoparticles and their properties as surface coating materials against coronavirus: viewpoint","authors":"H. Idriss, M. Habib, A. Alakhras, H. M. El Khair","doi":"10.15251/jobm.2022.142.53","DOIUrl":"https://doi.org/10.15251/jobm.2022.142.53","url":null,"abstract":"A pandemic of coronavirus infection is causing a significant public health hazard globally, putting millions of people at risk in an increasing amount of countries. Nanostructured materials have been recognized to be highly efficient against coronaviruses. ZnO nanoparticles possess unique features that enable to act as anti-bacterial and anti-viral. Hence, the aim of the current investigation is to produce zinc oxide nanoparticles and utilized as surface coating materials against COVID-19. Thermal decomposition has been utilized in this investigation to fabricate ZnO nanoparticles with crystallite of 41 and 55 nm. The study outcomes demonstrated that Zinc nanoparticles is a favorable material for future usage as an anti-coronavirus surface due to their ecologically friendly features and exceptional physical and chemical functionality.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42247141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.15251/jobm.2022.142.69
D. Tamilselvi, N. Velmani, K. Rathidevi, V. Geethalakshmi, R. Nandhini
Zn-O nanoparticles were successfully synthesized by sol-gel route using ZnSO4.7H2O as precursor in alkaline medium. Structural, morphological and optical property of Zn-O NPs was analyzed. Zn-O NPs were characterized by using X-ray diffraction (XRD), Fourier transform infrared spectral (FTIR), UV-Visible spectrophotometer, scanning electron microscopy (SEM) and Energy Dispersive X-ray analysis (EDAX).XRD pattern shows the purity of synthesized Zn-O nanoparticles particle size. Scanning electron microscopy (SEM) observations revealed remarkable change in morphological structure of Zn-O NPs. Analysis studies was confirmed, the functional groups and chemical bonding present in the synthesized Zn-O nanoparticles.
{"title":"Synthesis, characterization with optical property of Zn-O NPs using sol-gel route in alkaline medium","authors":"D. Tamilselvi, N. Velmani, K. Rathidevi, V. Geethalakshmi, R. Nandhini","doi":"10.15251/jobm.2022.142.69","DOIUrl":"https://doi.org/10.15251/jobm.2022.142.69","url":null,"abstract":"Zn-O nanoparticles were successfully synthesized by sol-gel route using ZnSO4.7H2O as precursor in alkaline medium. Structural, morphological and optical property of Zn-O NPs was analyzed. Zn-O NPs were characterized by using X-ray diffraction (XRD), Fourier transform infrared spectral (FTIR), UV-Visible spectrophotometer, scanning electron microscopy (SEM) and Energy Dispersive X-ray analysis (EDAX).XRD pattern shows the purity of synthesized Zn-O nanoparticles particle size. Scanning electron microscopy (SEM) observations revealed remarkable change in morphological structure of Zn-O NPs. Analysis studies was confirmed, the functional groups and chemical bonding present in the synthesized Zn-O nanoparticles.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43581863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.15251/jobm.2022.142.63
A. Polu, V. Mekala, T. Ramesh
Using the solution-cast approach, new solid polymer electrolyte films containing sodium acetate (CH3COONa) in poly (ethylene glycol) were prepared. These polymer electrolyte systems have been characterized using a variety of experimental approaches, including temperature-dependent conductivity and DSC. The endothermic peak at 59.42°C, which corresponds to the melting temperature of pure PEG, is revealed by DSC measurements. Due to the addition of salt to the polymer, a minor movement in the melting point, Tm, towards lower temperatures has been detected. At 30°C, the 80PEG+20CH3COONa electrolyte system had a maximum conductivity of 7.9 × 10-6 S/cm. When compared to pure PEG, the conductivity enhanced by two orders of magnitude. The magnitude of conductivity increased as the temperature raised.
{"title":"Synthesis and characterization of new solid polymer electrolyte (PEG + CH3COONa) for solid-state sodium batteries","authors":"A. Polu, V. Mekala, T. Ramesh","doi":"10.15251/jobm.2022.142.63","DOIUrl":"https://doi.org/10.15251/jobm.2022.142.63","url":null,"abstract":"Using the solution-cast approach, new solid polymer electrolyte films containing sodium acetate (CH3COONa) in poly (ethylene glycol) were prepared. These polymer electrolyte systems have been characterized using a variety of experimental approaches, including temperature-dependent conductivity and DSC. The endothermic peak at 59.42°C, which corresponds to the melting temperature of pure PEG, is revealed by DSC measurements. Due to the addition of salt to the polymer, a minor movement in the melting point, Tm, towards lower temperatures has been detected. At 30°C, the 80PEG+20CH3COONa electrolyte system had a maximum conductivity of 7.9 × 10-6 S/cm. When compared to pure PEG, the conductivity enhanced by two orders of magnitude. The magnitude of conductivity increased as the temperature raised.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47255735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.15251/jobm.2022.142.29
A. G. Flota Robledo, J. Pantoja Enríquez, C. A. Meza Avendaño, G. Pérez Hernández, P. J. Juárez Gutiérrez
We report the extraction of natural dyes from Brazil and Taray bark, the impregnation of these dyes in thin films of ZnO synthesized via sol-gel method and deposited by Doctor Blade and finally the fabrication of dye sensitized solar cells (DSSC). The ZnO/dyes structures were characterized using UV-Visible and infrared spectroscopy. The analysis of the infrared spectra shows that the semiconductors impregnated with the extracted dyes exhibit the characteristic of dye anchorage in ZnO. The photovoltaic performance and efficiency of the assembled DSSCs was evaluated.
{"title":"DSSCs based on ZnO photoelectrodes sensitized with natural dyes extracted from the bark of Brazil and Taray","authors":"A. G. Flota Robledo, J. Pantoja Enríquez, C. A. Meza Avendaño, G. Pérez Hernández, P. J. Juárez Gutiérrez","doi":"10.15251/jobm.2022.142.29","DOIUrl":"https://doi.org/10.15251/jobm.2022.142.29","url":null,"abstract":"We report the extraction of natural dyes from Brazil and Taray bark, the impregnation of these dyes in thin films of ZnO synthesized via sol-gel method and deposited by Doctor Blade and finally the fabrication of dye sensitized solar cells (DSSC). The ZnO/dyes structures were characterized using UV-Visible and infrared spectroscopy. The analysis of the infrared spectra shows that the semiconductors impregnated with the extracted dyes exhibit the characteristic of dye anchorage in ZnO. The photovoltaic performance and efficiency of the assembled DSSCs was evaluated.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45439138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.15251/jobm.2022.142.43
H. M. A. Algelal, S. Kareem, K. A. Mohammed, E. J. Khamees, A. S. Abed, A. H. Alkhayatt, R. R. Al-Okbi
This work investigates the structure, morphology, and optical properties of TiO2 nanoparticles embedded in a Fe2O3–PVA composite matrix. The samples were examined using a variety of techniques, including field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), absorption and transmission spectra, and Fourier transformation infrared (FTIR). Crystallography information revealed the presence of TiO2 doesn’t effect in the crystal structure of PVA-Fe2O3. The manufactured composites demonstration strong absorption in the range of 440–570 nm. It is important that the highest absorption of these composites gradually shifted to the shorter wavelength region with presence of TiO2. PVA-Fe2O3 is highly transparent with transmittance of around 85 % in range 600-800 nm. After addition of 2.5 % by weight of TiO2 nanoparticles, the transmittance of nanocomposite drops to 75% in the same range of wavelength . Further addition of nanoparticles reduced the percentage transmittance to 68%. The results specify that as the TiO2 ratio increases, the band gap be wider.
{"title":"Synthesis of PVA-Fe2O3-TiO2 hybrid structure for biomedical application","authors":"H. M. A. Algelal, S. Kareem, K. A. Mohammed, E. J. Khamees, A. S. Abed, A. H. Alkhayatt, R. R. Al-Okbi","doi":"10.15251/jobm.2022.142.43","DOIUrl":"https://doi.org/10.15251/jobm.2022.142.43","url":null,"abstract":"This work investigates the structure, morphology, and optical properties of TiO2 nanoparticles embedded in a Fe2O3–PVA composite matrix. The samples were examined using a variety of techniques, including field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), absorption and transmission spectra, and Fourier transformation infrared (FTIR). Crystallography information revealed the presence of TiO2 doesn’t effect in the crystal structure of PVA-Fe2O3. The manufactured composites demonstration strong absorption in the range of 440–570 nm. It is important that the highest absorption of these composites gradually shifted to the shorter wavelength region with presence of TiO2. PVA-Fe2O3 is highly transparent with transmittance of around 85 % in range 600-800 nm. After addition of 2.5 % by weight of TiO2 nanoparticles, the transmittance of nanocomposite drops to 75% in the same range of wavelength . Further addition of nanoparticles reduced the percentage transmittance to 68%. The results specify that as the TiO2 ratio increases, the band gap be wider.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46338968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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