Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1339
M. Y. Yadgari, S. Subat, S. Rashid, S. Ullah, L. Li, M. A. Hassani, H. Emiliya, G. Rukh
Recently, the rapid increase in population and industrialization has been created a lot of problems to water resources around the world. Most of the world population are exposed directly or indirectly towards heavy metals (HMs) such as Arsenic (As) contamination and thus making the water resources unfit for drinking and other human purposes. The current study was planned to find the As adsorption potential of novel thiolated cobalt-doped silver nanoparticles (Co-Ag NPs) under various environmental setups. In present work the Co-Ag NPs of sizes (20–22 nm) were synthesized through co-precipitation process. Adsorption of As with Co-Ag NPs was tested in batch experiments with respect light, pH and competing anions. Overall, the Co-Ag NPs effectively adsorbed the As in presence of sunlight (100%) and neutral pH (>99%). The removal of As was maximum (>99%) at CoAg NPs:As ratio of < 0.5:1. Similarly, the synthesized Co-Ag NPs did not showed the goodadsorption efficiency in dark condition about (21.4%) and only (11.1%) uptake at low and high pH respectively. Results of the current study showed that Co-Ag NPs can efficiently adsorb the As and reduce to non-toxic form i.e. below the WHO standard limit (10 µg/L)in drinking water.
{"title":"Toxic effects of arsenic and its adsorption through thiolated cobalt doped silver nanomaterials from water resources","authors":"M. Y. Yadgari, S. Subat, S. Rashid, S. Ullah, L. Li, M. A. Hassani, H. Emiliya, G. Rukh","doi":"10.15251/djnb.2023.184.1339","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1339","url":null,"abstract":"Recently, the rapid increase in population and industrialization has been created a lot of problems to water resources around the world. Most of the world population are exposed directly or indirectly towards heavy metals (HMs) such as Arsenic (As) contamination and thus making the water resources unfit for drinking and other human purposes. The current study was planned to find the As adsorption potential of novel thiolated cobalt-doped silver nanoparticles (Co-Ag NPs) under various environmental setups. In present work the Co-Ag NPs of sizes (20–22 nm) were synthesized through co-precipitation process. Adsorption of As with Co-Ag NPs was tested in batch experiments with respect light, pH and competing anions. Overall, the Co-Ag NPs effectively adsorbed the As in presence of sunlight (100%) and neutral pH (>99%). The removal of As was maximum (>99%) at CoAg NPs:As ratio of < 0.5:1. Similarly, the synthesized Co-Ag NPs did not showed the goodadsorption efficiency in dark condition about (21.4%) and only (11.1%) uptake at low and high pH respectively. Results of the current study showed that Co-Ag NPs can efficiently adsorb the As and reduce to non-toxic form i.e. below the WHO standard limit (10 µg/L)in drinking water.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138605059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1409
S. Bouali, K. Bounab, H. Menasra, Z. Necira, M. Abba
In this study, perovskite ceramics (Na0.5 Bi0.5)1-xBax[(Ti0.8 Zr0.2)0.9(Nb2/3 Zn1/3)0.1]O3 (NB1- xBxTZNZ) were prepared using the molten salt method. The sintering process was conducted at 1100°C for 4 hours in an air atmosphere. The crystal structure was examined using X-ray powder diffraction, which indicated that the material crystallized in a tetragonal structure with a space groupe P4bm. However, there was also evidence of 6% pyrochlore phase present. The crystallite size was found to decrease with Barium doping, and this decrease was attributed to the pinning effect of grain boundaries resulting from the formation of oxygen vacancies which reduce the AC conductivity values. Scanning electron microscopy was employed to examine the grain morphologies, revealing that the sample exhibited a compact structure. Additionally, the density of (NB1-xBxTZNZ) (x=0.04) was observed to be higher compared to (NB1-xBxTZNZ) (x=0.00). Barium doped into NB1-xBxTZNZ also caused a decrease in dielectric constant and dielectric loss. Raman spectroscopy was performed at room temperature on the doped ceramic with Barium, and we discussed the incorporation of Ba2+ in A-site of the perovskite ABO3.
{"title":"The effects of 4% barium doping on the morphological, strutural and dielectric characteristics of (Na0.5 Bi0.5)[(Ti0.8 Zr0.2)0.9(Nb2/3 Zn1/3)0.1]O3","authors":"S. Bouali, K. Bounab, H. Menasra, Z. Necira, M. Abba","doi":"10.15251/djnb.2023.184.1409","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1409","url":null,"abstract":"In this study, perovskite ceramics (Na0.5 Bi0.5)1-xBax[(Ti0.8 Zr0.2)0.9(Nb2/3 Zn1/3)0.1]O3 (NB1- xBxTZNZ) were prepared using the molten salt method. The sintering process was conducted at 1100°C for 4 hours in an air atmosphere. The crystal structure was examined using X-ray powder diffraction, which indicated that the material crystallized in a tetragonal structure with a space groupe P4bm. However, there was also evidence of 6% pyrochlore phase present. The crystallite size was found to decrease with Barium doping, and this decrease was attributed to the pinning effect of grain boundaries resulting from the formation of oxygen vacancies which reduce the AC conductivity values. Scanning electron microscopy was employed to examine the grain morphologies, revealing that the sample exhibited a compact structure. Additionally, the density of (NB1-xBxTZNZ) (x=0.04) was observed to be higher compared to (NB1-xBxTZNZ) (x=0.00). Barium doped into NB1-xBxTZNZ also caused a decrease in dielectric constant and dielectric loss. Raman spectroscopy was performed at room temperature on the doped ceramic with Barium, and we discussed the incorporation of Ba2+ in A-site of the perovskite ABO3.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138603803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1371
M. Zerouali, R. Daïra, B. Boudjema, R. Barille, D. Bouras, S. Iaiche
In this work, copper oxide thin films were deposited by pneumatic spray pyrolysis method on a microscopy glass substrate, heated at 400°C for different deposition times (5min, 10min, 15min, 20min,25min, and 30min) using a 0.1M of precursor concentration. These films are characterized by X-ray diffraction (XRD), Fourier-transform infrared (FT-IR), spectroscopic ellipsometry, UV-visible spectroscopy, four points method, and water contact angle. According to the XRD, all peaks confirm the formation of the phase tenorite of the monoclinic structure. The deposited were polycrystalline copper oxide CuO with directions along (111) plane, the crystallites size between 14 and 23 nm. FTIR spectroscopy confirms the presence of the CuO phase and agrees that it will result in XRD. From the transmission spectra, the average transmission between 400 and 800nm is 65% to 50%, and the gap energy is 2.65 eV to 1.09 eV. The water contact angle values in all samples are greater than 90° and range from 96.4° to 103.2°, as we can see from these results that all the samples are hydrophobic films.
{"title":"Effect thickness of copper oxide thin films on structural, optical, electrical, and hydrophobic properties for use in self-cleaning technique","authors":"M. Zerouali, R. Daïra, B. Boudjema, R. Barille, D. Bouras, S. Iaiche","doi":"10.15251/djnb.2023.184.1371","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1371","url":null,"abstract":"In this work, copper oxide thin films were deposited by pneumatic spray pyrolysis method on a microscopy glass substrate, heated at 400°C for different deposition times (5min, 10min, 15min, 20min,25min, and 30min) using a 0.1M of precursor concentration. These films are characterized by X-ray diffraction (XRD), Fourier-transform infrared (FT-IR), spectroscopic ellipsometry, UV-visible spectroscopy, four points method, and water contact angle. According to the XRD, all peaks confirm the formation of the phase tenorite of the monoclinic structure. The deposited were polycrystalline copper oxide CuO with directions along (111) plane, the crystallites size between 14 and 23 nm. FTIR spectroscopy confirms the presence of the CuO phase and agrees that it will result in XRD. From the transmission spectra, the average transmission between 400 and 800nm is 65% to 50%, and the gap energy is 2.65 eV to 1.09 eV. The water contact angle values in all samples are greater than 90° and range from 96.4° to 103.2°, as we can see from these results that all the samples are hydrophobic films.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138605040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1433
G. Q. Xu, C. Q. Li, F. J. Wang, J. F. Ou, Z. Y. Xue, A. Amirfazli
The problem of bacterial adhesion has been a challenge in everyday life and industry for decades. In this paper, polytetrafluoroethylene(PTFE) micropowder, titanium dioxide(TiO2) nanopowder, ethyl acetate and epoxy resin were sequentially added to a beaker and stirred well, then the nanoparticles were modified using perfluorooctyltriethoxysilane (POTS), and finally superhydrophobic coatings were fabricated on the surface of an aluminium sheet by spraying process. Characterisation was carried out using scanning electron microscopy and contact angle measurement, and the coating wettability, chemical stability and mechanical stability properties were investigated, and finally the coating was tested for antimicrobial properties. The study suggests that the hydrophobicity of the sample was optimal at a contact angle of 163.3° and a rolling angle of 3.2° when the ratio of PTFE micropowder to nano-TiO2 by mass was 1:4 and the ration between POTS and nanoparticles by mass was 12%. The contact angles were 137.8° and 143.6° after 25 and 32 hours of soaked in an anhydrous solution with a pH of 14 and 1, respectively. Most importantly, it exhibits good antimicrobial properties.
{"title":"Preparation and properties of PTFE@TiO2/epoxy superhydrophobic coating","authors":"G. Q. Xu, C. Q. Li, F. J. Wang, J. F. Ou, Z. Y. Xue, A. Amirfazli","doi":"10.15251/djnb.2023.184.1433","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1433","url":null,"abstract":"The problem of bacterial adhesion has been a challenge in everyday life and industry for decades. In this paper, polytetrafluoroethylene(PTFE) micropowder, titanium dioxide(TiO2) nanopowder, ethyl acetate and epoxy resin were sequentially added to a beaker and stirred well, then the nanoparticles were modified using perfluorooctyltriethoxysilane (POTS), and finally superhydrophobic coatings were fabricated on the surface of an aluminium sheet by spraying process. Characterisation was carried out using scanning electron microscopy and contact angle measurement, and the coating wettability, chemical stability and mechanical stability properties were investigated, and finally the coating was tested for antimicrobial properties. The study suggests that the hydrophobicity of the sample was optimal at a contact angle of 163.3° and a rolling angle of 3.2° when the ratio of PTFE micropowder to nano-TiO2 by mass was 1:4 and the ration between POTS and nanoparticles by mass was 12%. The contact angles were 137.8° and 143.6° after 25 and 32 hours of soaked in an anhydrous solution with a pH of 14 and 1, respectively. Most importantly, it exhibits good antimicrobial properties.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138601551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1385
F. H. Jasim, H. R. Shakir, S. S. Chiad, N. Habubi, Z. S. A. Mosa, Y. H. Kadhim, M. Jadan
TiO2 and TiO2:Cu films were deposited by spray pyrolysis (SP). X-ray diffraction reveals that deposited films have a polycrystalline structural. The AFM image of the surface reveals that roughness and root mean square affected by doping. Optical transmission of films was found to decrease from 94 % to 84 % with the as the doping percentage increase to 3. Optical bandgap (Eg) of TiO2 thin film was 3.947eV. The bandgap is shifted to lower energies upon doping.
{"title":"Characterizations of sprayed TiO2 and Cu doped TiO2 thin films prepared by spray pyrolysis method","authors":"F. H. Jasim, H. R. Shakir, S. S. Chiad, N. Habubi, Z. S. A. Mosa, Y. H. Kadhim, M. Jadan","doi":"10.15251/djnb.2023.184.1385","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1385","url":null,"abstract":"TiO2 and TiO2:Cu films were deposited by spray pyrolysis (SP). X-ray diffraction reveals that deposited films have a polycrystalline structural. The AFM image of the surface reveals that roughness and root mean square affected by doping. Optical transmission of films was found to decrease from 94 % to 84 % with the as the doping percentage increase to 3. Optical bandgap (Eg) of TiO2 thin film was 3.947eV. The bandgap is shifted to lower energies upon doping.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138602201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1473
Z. W. Chen, J. L. Zhu, J. Liu, A. X. Wei
The FexMo1-xS2 nanosheets with different Fe doping content x were grown on carbon nanotubes @ carbon cloth (CNT@CC) substrate using a hydrothermal method by varying the molar ratio of FeSO4·7H2O to Na2MoO4·2H2O in the precursor solution. The effect on HER, OER and overall water splitting (OWS) performance of Fe doping content x were studied. The FexMo1-xS2 nanosheets have the optimal HER and OWS performance for x=0.050 and the optimal OER performance for x=0.075. The overpotential at current density of 100 mA/cm2 and Tafel slope are 198 mV and 44.7 mVdec-1 for HER; and they are 279 mV and 24.5 mV/dec for OER in 1 M KOH electrolyte. The electrolytic cell using Fe0.05Mo0.95S2/ CNT@CC as both cathode and anode achieves a voltage of 1.69 V at current density of 100 mAcm-2 . The bifunctional catalytic activities of the FexMo1-xS2/ CNT@CC catalyst come from the synergistic effect between FexMo1-xS2 nanosheets and CNT.
{"title":"FexMo1-xS2/CNT@CC nanosheets as an efficient bifunctional electrocatalyst for overall water splitting","authors":"Z. W. Chen, J. L. Zhu, J. Liu, A. X. Wei","doi":"10.15251/djnb.2023.184.1473","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1473","url":null,"abstract":"The FexMo1-xS2 nanosheets with different Fe doping content x were grown on carbon nanotubes @ carbon cloth (CNT@CC) substrate using a hydrothermal method by varying the molar ratio of FeSO4·7H2O to Na2MoO4·2H2O in the precursor solution. The effect on HER, OER and overall water splitting (OWS) performance of Fe doping content x were studied. The FexMo1-xS2 nanosheets have the optimal HER and OWS performance for x=0.050 and the optimal OER performance for x=0.075. The overpotential at current density of 100 mA/cm2 and Tafel slope are 198 mV and 44.7 mVdec-1 for HER; and they are 279 mV and 24.5 mV/dec for OER in 1 M KOH electrolyte. The electrolytic cell using Fe0.05Mo0.95S2/ CNT@CC as both cathode and anode achieves a voltage of 1.69 V at current density of 100 mAcm-2 . The bifunctional catalytic activities of the FexMo1-xS2/ CNT@CC catalyst come from the synergistic effect between FexMo1-xS2 nanosheets and CNT.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138604701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1327
N. Abbas, J. M. Zhang, S. Nazir, H. Akhtar, M. Zaqa, S. Saleem, G. Mustafa
Barium oxide have wide attention towards electronic device applications because of their exceptional structural, optical, electrical properties. Sol-gel process was used to prepare the nanocrystalline barium oxide. XRD investigation confirms that that the synthesized Barium oxide nanoparticles highly crystalline nature and have tetragonal structure. The crystal size measured by Scherrer formula and obtained values lies in the range (2.3- 6.7nm). The SEM micrographs revealed a reducing agglomeration and porosity with the enrichment in the doping content. IR analysis revealed that prepared samples have high purity while Raman spectra exhibited that the bands intensity of the synthesized nanoparticles was enhanced due to enhancement in force constant with the addition of doping content. UV-vis spectra analysis, performed to study the optical properties, revealed that optical band gap was decrease with increase of the doping content and obtained band gap results lies in the range (1.99-1.85 eV). Moreover, the conductivity of the prepared sample was observed increased from 7.28 × 10-5 Ʊ cm-1 to 1.79 × 10-3 Ʊ cm1, while the resistivity was decreased from 1.1 ×104 Ω cm to 5.58 ×102 Ω cm with the increasing of the doping content. The explored results exhibited that the doping iron content, enhanced the characteristics of prepared oxides. Such characteristics of BaO make a potential candidate for electronic device applications.
{"title":"Synthesis and characterization of Fe-substituting BaO nanoparticles by sol-gel method","authors":"N. Abbas, J. M. Zhang, S. Nazir, H. Akhtar, M. Zaqa, S. Saleem, G. Mustafa","doi":"10.15251/djnb.2023.184.1327","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1327","url":null,"abstract":"Barium oxide have wide attention towards electronic device applications because of their exceptional structural, optical, electrical properties. Sol-gel process was used to prepare the nanocrystalline barium oxide. XRD investigation confirms that that the synthesized Barium oxide nanoparticles highly crystalline nature and have tetragonal structure. The crystal size measured by Scherrer formula and obtained values lies in the range (2.3- 6.7nm). The SEM micrographs revealed a reducing agglomeration and porosity with the enrichment in the doping content. IR analysis revealed that prepared samples have high purity while Raman spectra exhibited that the bands intensity of the synthesized nanoparticles was enhanced due to enhancement in force constant with the addition of doping content. UV-vis spectra analysis, performed to study the optical properties, revealed that optical band gap was decrease with increase of the doping content and obtained band gap results lies in the range (1.99-1.85 eV). Moreover, the conductivity of the prepared sample was observed increased from 7.28 × 10-5 Ʊ cm-1 to 1.79 × 10-3 Ʊ cm1, while the resistivity was decreased from 1.1 ×104 Ω cm to 5.58 ×102 Ω cm with the increasing of the doping content. The explored results exhibited that the doping iron content, enhanced the characteristics of prepared oxides. Such characteristics of BaO make a potential candidate for electronic device applications.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138602441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1423
A. Phuruangrat, T. Thongtem, S. Thongtem
Visible-light-driven LaxAl0.03-xZn0.97O (x = 0.01, 0.015 and 0.02) nanoparticles were synthesized by tartaric acid-assisted combustion method. Both ZnO and La/Al co-doped ZnO samples were indexed to the pure hexagonal wurtzite ZnO structure and were composed of nanoparticles with particle size ranges of 100-150 nm and 20-50 nm, respectively. The photocatalytic activities of ZnO and LaxAl0.03-xZn0.97O (x = 0.01, 0.015 and 0.02) nanoparticles were monitored through the degradation of methylene blue (MB) under visible light irradiation. The La0.02Al0.01Zn0.97O nanoparticles have the highest photocatalytic activity in degrading of MB under visible light irradiation because the La/Al co-dopant played the role in creating shallow energy level under the conduction band of ZnO.
{"title":"Combustion synthesis and characterization of visible-light-driven La/Al co-doped ZnO nanoparticles used for wastewater treatment","authors":"A. Phuruangrat, T. Thongtem, S. Thongtem","doi":"10.15251/djnb.2023.184.1423","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1423","url":null,"abstract":"Visible-light-driven LaxAl0.03-xZn0.97O (x = 0.01, 0.015 and 0.02) nanoparticles were synthesized by tartaric acid-assisted combustion method. Both ZnO and La/Al co-doped ZnO samples were indexed to the pure hexagonal wurtzite ZnO structure and were composed of nanoparticles with particle size ranges of 100-150 nm and 20-50 nm, respectively. The photocatalytic activities of ZnO and LaxAl0.03-xZn0.97O (x = 0.01, 0.015 and 0.02) nanoparticles were monitored through the degradation of methylene blue (MB) under visible light irradiation. The La0.02Al0.01Zn0.97O nanoparticles have the highest photocatalytic activity in degrading of MB under visible light irradiation because the La/Al co-dopant played the role in creating shallow energy level under the conduction band of ZnO.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138603069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.15251/djnb.2023.184.1493
S. R. Kadum, A. S. Baron, H. M. J. Haider
In this study, the Li[Li0.20Ni0.13Co0.13-yMn0.54-x]AlyInxO2 was synthesized via sol-gel method. electrochemical and structural attributes of nanopowders determined by the thermal analysis (TGA)/(DTA), structural analysis (XRD), (FESEM), chemical analysis (EDS) and (FTIR), BET analysis and their results appraised. X-ray diffraction analysis were performed to study the formation of nanopowders, illustrating the α- NaFeO2 structure with R¯3m space group. FESEM Figures showed that the nanopowders have a group of the cubic and the hexagonal particles. Chemical test of the EDS proved the existence of Aluminum and Indium. TGA/DTA tests for the displayed weight loss in the nanopowders. Infrared spectroscopy studied connectivity bonds and chemical elements that are utilized in the cathode. The powders with Al (y = 0.02) and In (x = 0. 01) represented the high cycling efficiency and have better discharge capacity. Li[Li0.20Ni0.13Co0.13-0.02Mn0.54-0.01]Al0.02In0.01O2 displayed the higher cycling consistency and the better capacity in collation with those of the nonreplacement powders. Electrochemical impedance spectroscopy (EIS) showed that adding the Indium-Aluminum impurities improved the electrochemical efficiency of the Li[Li0.20Ni0.13Co0.13Mn0.54]O2.
{"title":"Enhanced high performance of aluminum/indium Co-doped lithium nickel manganese cobalt oxide for possible batteries application","authors":"S. R. Kadum, A. S. Baron, H. M. J. Haider","doi":"10.15251/djnb.2023.184.1493","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1493","url":null,"abstract":"In this study, the Li[Li0.20Ni0.13Co0.13-yMn0.54-x]AlyInxO2 was synthesized via sol-gel method. electrochemical and structural attributes of nanopowders determined by the thermal analysis (TGA)/(DTA), structural analysis (XRD), (FESEM), chemical analysis (EDS) and (FTIR), BET analysis and their results appraised. X-ray diffraction analysis were performed to study the formation of nanopowders, illustrating the α- NaFeO2 structure with R¯3m space group. FESEM Figures showed that the nanopowders have a group of the cubic and the hexagonal particles. Chemical test of the EDS proved the existence of Aluminum and Indium. TGA/DTA tests for the displayed weight loss in the nanopowders. Infrared spectroscopy studied connectivity bonds and chemical elements that are utilized in the cathode. The powders with Al (y = 0.02) and In (x = 0. 01) represented the high cycling efficiency and have better discharge capacity. Li[Li0.20Ni0.13Co0.13-0.02Mn0.54-0.01]Al0.02In0.01O2 displayed the higher cycling consistency and the better capacity in collation with those of the nonreplacement powders. Electrochemical impedance spectroscopy (EIS) showed that adding the Indium-Aluminum impurities improved the electrochemical efficiency of the Li[Li0.20Ni0.13Co0.13Mn0.54]O2.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138604095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-30DOI: 10.15251/djnb.2023.184.1269
S. Benamora, M. Diafi, A. Touane, D. Sahnoune
The effects the concentration of lead on zinc-lead alloys obtained from sulphate baths under continuous current deposition are described. The deposit morphology was analyzed using Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) was used to determine the preferred crystallographic orientations of the deposits. Protection against corrosion properties studied in a solution of 3 % NaCl in the potentiodynamic polarization measurements (Tafel), It has been observed that the Zn–Pb alloy is characterized by enhanced the resistance of corrosion compared to the Zn alloys and the addition of Pb in the Zn-Pb increases the micro-hardness, XRD and SEM results an identify any coatings Zn-Pb alloy composition reveals that. Zinc - rich (η- phase).
{"title":"The influence of lead concentration on the properties of the electrodeposited zinc–lead alloy coatings","authors":"S. Benamora, M. Diafi, A. Touane, D. Sahnoune","doi":"10.15251/djnb.2023.184.1269","DOIUrl":"https://doi.org/10.15251/djnb.2023.184.1269","url":null,"abstract":"The effects the concentration of lead on zinc-lead alloys obtained from sulphate baths under continuous current deposition are described. The deposit morphology was analyzed using Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) was used to determine the preferred crystallographic orientations of the deposits. Protection against corrosion properties studied in a solution of 3 % NaCl in the potentiodynamic polarization measurements (Tafel), It has been observed that the Zn–Pb alloy is characterized by enhanced the resistance of corrosion compared to the Zn alloys and the addition of Pb in the Zn-Pb increases the micro-hardness, XRD and SEM results an identify any coatings Zn-Pb alloy composition reveals that. Zinc - rich (η- phase).","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136133389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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