Digest Journal of Nanomaterials and Biostructures最新文献_第5页

Characterization, electrical and optical properties of PVA/MnO2 nanocomposite materials PVA/MnO2纳米复合材料的表征、电学和光学性能

4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-09-20 DOI: 10.15251/djnb.2023.183.1051

B. M. Alotaibi, H. A. Al-Yousef, A. Atta, F. Taher

{"title":"Characterization, electrical and optical properties of PVA/MnO2 nanocomposite materials","authors":"B. M. Alotaibi, H. A. Al-Yousef, A. Atta, F. Taher","doi":"10.15251/djnb.2023.183.1051","DOIUrl":"https://doi.org/10.15251/djnb.2023.183.1051","url":null,"abstract":"In this research, various concentrations of manganese dioxide (MnO2) is composed by polyvinyl alcohol (PVA) to forming PVA /MnO2 films. The XRD and SEM are respectively demonstrated the structure and morphological characteristics of the films. The XRD results show that the PVA/MnO2 films is fabricated successfully. The SEM results demonstrate that MnO2 is dispersed evenly along the PVA polymeric chains. The conductivity, impedance and energy density were measured via an LCR bridge with frequency 102 to 106 Hz. There is an increase in dielectric from 64 for PVA to 95 for PVA/0.06MnO2 at 105 Hz, and also the conductivity increases from 3.61x10-3 S/cm for PVA to 5.33x10-3 S/cm for PVA/0.06MnO2. The optical characteristics of PVA and PVA/MnO2 films were recorded by UV/Vis spectroscopy. The band gap reduced from 5.01 eV for PVA to 4.85, 4.71, 4.59 eV respectively for PVA/0.02MnO2, PVA/0.04MnO2, and PVA/0.06MnO2. And the Urbach tail is modified from 1.72 eV for PVA to 3.12, 3.453, and 3.66 eV respectively. The results of the present work open the possibility for applied in different devices as energy storage systems and optoelectronics.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136375036","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}

引用次数: 0

Variation in the crystallinity of cobalt oxide nanoparticles with increasing annealing temperature and pH 氧化钴纳米粒子结晶度随退火温度和pH值的变化

4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-09-20 DOI: 10.15251/djnb.2023.183.1079

S. Haq, W. Rehman, M. Waseem, Kh. Elmnasri, A. Hedfi, M. Ben Ali, E. Mahmoudi, M. Ur Rehman, B. Khan

引用次数: 0

Characterization of silver oxide thin films with thickness variation prepared by thermal evaporation method 热蒸发法制备厚度变化的氧化银薄膜的表征

4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-09-20 DOI: 10.15251/djnb.2023.183.1039

F. A. Jasim, Z. S. A. Mosa, N. F. Habubi, Y. H. Kadhim, S. S. Chiad

引用次数: 0

Comparison the effect of co-precipitation and sol-gel techniques on the structural and magnetic attributes of ZnO and Zn(1-x)Fe0.05CoxO nanoparticles for attaining room temperature ferromagnetism (RTFM) 比较共沉淀法和溶胶-凝胶法对ZnO和Zn(1-x)Fe0.05CoxO纳米颗粒室温铁磁性(RTFM)结构和磁性的影响

4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-09-20 DOI: 10.15251/djnb.2023.183.1025

S. Kanwal, M. T. Khan, A. Zaman, V. Tirth, A. Algahtani, T. Al-Mughanam

{"title":"Comparison the effect of co-precipitation and sol-gel techniques on the structural and magnetic attributes of ZnO and Zn(1-x)Fe0.05CoxO nanoparticles for attaining room temperature ferromagnetism (RTFM)","authors":"S. Kanwal, M. T. Khan, A. Zaman, V. Tirth, A. Algahtani, T. Al-Mughanam","doi":"10.15251/djnb.2023.183.1025","DOIUrl":"https://doi.org/10.15251/djnb.2023.183.1025","url":null,"abstract":"In current study, ZnO and Fe/Co co-doped ZnO (Zn1-x Fe0.05 Cox O where x = 0, 0.005) nanoparticles were prepared by using two different methodologies: sol gel method and coprecipitation method. The structural properties were determined by X-Ray diffraction technique which verifies the hexagonal wurtzite structure of prepared nanoparticles. Crystallite size varies from 18.68-37.43 nm for the samples synthesized by co-precipitation method and it varies from 19.97-38.45 nm for sol-gel method. Fourier transform infrared transmittance spectra were used to investigate the type of functional groups present in all the prepared nanoparticles. The UV-Visible absorption spectroscopy was employed to investigate the optical properties of ZnO and doping of Fe/Co in ZnO semiconducting host. The energy band gap varies from 3.03 - 3.68 eV for the samples synthesized by coprecipitation method and for sol-gel method, it ranges from 3.13 - 3.86 eV, by increasing dopant concentration. Vibrating sample magnetometer was used to inquire the magnetic behavior of synthesized nanoparticles which shows the weak ferromagnetic behavior of the doped nanoparticles prepared by both the techniques. Samples prepared by co-precipitation method showed higher values of saturation magnetization and coercivity as compared to the samples prepared by the sol-gel method. In comparison of two synthesis techniques, a slight change was observed in the particle size, energy band gap and magnetization values. The improved optical and magnetic behavior favors the co-precipitation method rather than sol gel method for obtaining room temperature ferromagnetism for practical applications in spintronics field.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136377811","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}

引用次数: 0

Synthesis and characterization of NaGdF4:Nd3+@Ni Core@Shell nanoparticles with potential applications in anaerobic digestion 纳米NaGdF4:Nd3+@Ni Core@Shell在厌氧消化中的应用

4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-09-20 DOI: 10.15251/djnb.2023.183.1093

G. S. Aguilar-Moreno, T. Espinosa-Solares, J. M. Santos-Gaspar, E. Montes-Ramírez, M. Á. Aguilar-Méndez, L. Martinez-Maestro, E. Navarro-Cerón

{"title":"Synthesis and characterization of NaGdF4:Nd3+@Ni Core@Shell nanoparticles with potential applications in anaerobic digestion","authors":"G. S. Aguilar-Moreno, T. Espinosa-Solares, J. M. Santos-Gaspar, E. Montes-Ramírez, M. Á. Aguilar-Méndez, L. Martinez-Maestro, E. Navarro-Cerón","doi":"10.15251/djnb.2023.183.1093","DOIUrl":"https://doi.org/10.15251/djnb.2023.183.1093","url":null,"abstract":"The NaGdF4:Nd3+@Ni core@shell nanoparticles were synthesized and characterized. First, core@shell nanoparticles were synthesized using a solvothermal method to obtain the NaGdF4:Nd3+ core with hexagonal phase; subsequently, a chemical reduction was performed to stimulate the growth of the Ni shell with cubic phase. NaGdF4:Nd3+@Ni nanoparticles were characterized by transmission electron microscope, zeta potential, X-ray diffraction, scattered energy spectroscopy, UV-Vis, and photoluminescence emission spectra. The nanoparticles were round in shape, with mean sizes around 250 nm. The core@shell nanoparticles presented a homogenous composition and good stability. The photoluminescent emission of the nanoparticles was recorded at 1059 nm in the nearinfrared spectral range; this band corresponds to the 4 F3/2→4 I11/2 radiative transitions of Nd3+ ions. The synthesized nanoparticles, being hydrophilic, have potential for use in different areas, one of them could be in anaerobic digestion.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136377360","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}

引用次数: 0

Effect of annealing temperature on the structural, morphological, photocatalytic and optical properties of the Cu-Ni co-doped TiO2 nanoparticles 退火温度对Cu-Ni共掺杂TiO2纳米颗粒结构、形貌、光催化和光学性能的影响

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-07-20 DOI: 10.15251/djnb.2023.183.841

M. Basir, S. Supardan, S. A. Kamil

{"title":"Effect of annealing temperature on the structural, morphological, photocatalytic and optical properties of the Cu-Ni co-doped TiO2 nanoparticles","authors":"M. Basir, S. Supardan, S. A. Kamil","doi":"10.15251/djnb.2023.183.841","DOIUrl":"https://doi.org/10.15251/djnb.2023.183.841","url":null,"abstract":"The effect of annealing temperature on the photocatalyst's structural, morphological, photocatalytic and optical properties have been extensively studied. In this work, the Cu-Ni co-doped TiO2 powder was prepared by the sol-gel technique and annealed at temperatures 400°C, 500°C, 600°C, 700°C, and 800°C. The structural phase of the Cu-Ni/TiO2 changed from anatase to rutile after the annealing temperature increased from 400°C to 800°C. The anatase phase was found at 400°C and 500°C, the mixed phase at 600 and 700°C, and the rutile phase at 800°C. The specific surface area and band gap of Cu-Ni/TiO2 were decreased with the increment of annealing temperatures from 70.00 to 24.89 m2 /g and 3.36 eV to 3.04 eV, respectively. Meanwhile, as the annealing temperature rises, the average particle size increases from 38.52 to 173.59 nm. The anatase-rutile mixed phase of Cu-Ni/TiO2 annealed at 600°C exhibited the highest photocatalytic degradation of methylene blue (MB) with 62.81% MB removal. Experimental results indicated that the annealing temperature could alter the structural, morphological, and optical properties of the Cu-Ni/TiO2, affecting the photocatalytic activity performance.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43660519","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}

引用次数: 0

Investigation of microwave attenuation and shielding performance of PTFE/Fe2O3/OPEFB composites at X-band frequency PTFE／Fe2O3／OPEFB复合材料在X波段的微波衰减及屏蔽性能研究

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-07-20 DOI: 10.15251/djnb.2023.183.805

M. A. Bello, R. Azis, M. K. Shabdin, N. Osman, A. Yakubu

引用次数: 0

Effect of sintering temperature on the structure and electrical properties of KNNS-0.03BNZ ceramics 烧结温度对KNNS-0.03BNZ陶瓷结构和电性能的影响

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-07-20 DOI: 10.15251/djnb.2023.183.813

H. W. Zhao, Yang Li, R. Zhao, Z. Li

引用次数: 0

Fabrication and in vitro evaluation of polyvinyl alcohol/bio-glass composite for potential wound healing applications 聚乙烯醇/生物玻璃复合材料的制备及体外评价

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-07-20 DOI: 10.15251/djnb.2023.183.821

T. Khan, E. H. Mirza, N. J. Kurd, M. Naushad, M. U. Ul Haque

{"title":"Fabrication and in vitro evaluation of polyvinyl alcohol/bio-glass composite for potential wound healing applications","authors":"T. Khan, E. H. Mirza, N. J. Kurd, M. Naushad, M. U. Ul Haque","doi":"10.15251/djnb.2023.183.821","DOIUrl":"https://doi.org/10.15251/djnb.2023.183.821","url":null,"abstract":"In this study, a novel composite is fabricated by incorporating Polyvinyl alcohol (PVA) and Bio-Glass (BG) via the freeze-thaw method. PVA pre-polymer is prepared in three different concentrations i.e. (2%, 5%, and 10%) by dissolving PVA powder in distilled water by using a hot plate magnetic stirrer at 80° C, and a constant concentration of BG i.e 2% is added into each PVA prepolymer. Total six specimens including (PVA (2%), PVA (5%), PVA (10%), PVA (2%)/BG (2%), PVA (5%)/BG (2%), and PVA (10%)/ BG (2%) were prepared in which pure PVA specimens acts as a control group. The physicochemical and mechanical properties of the specimens were examined. Various characterization tests such as scanning electron microscopy (SEM), swelling analysis, degradability analysis, hygroscopicity, pH sensitivity, tensile analysis, gel fraction test, water vapor transmission rate (WVTR), and, contact angle analysis were performed on the samples. SEM analysis showed that with the increase in PVA concentration, the material becomes smoother and more compact. Results from the current study showed that tensile strength, degradation rate, and get content are directly proportional to PVA concentration, while swelling capacity, pH sensitivity, hygroscopicity, WVTR, and hydrophilicity are inversely related to PVA concentration. Moreover, with the addition of BG, tensile strength, degradation rate, pH sensitivity, swelling capability, hydrophilicity, and, gel content of the specimens is increased, whereas, WVTR is decreased and, hygroscopicity remains unchanged. Furthermore, results from this study must be taken a step ahead & biocompatibility must be tested to evaluate the biological performance.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43524605","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}

引用次数: 0

The difference in the type of zinc oxide nanostructures depending on the growth layer 氧化锌纳米结构类型的不同取决于生长层

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-07-20 DOI: 10.15251/djnb.2023.183.793

S. Abbas, E. Hassan, O. Abdulmunem

引用次数: 0