Journal of Nanostructures最新文献_第2页

Antimicrobial and Cytotoxic Activity of Platinum Nanoparticles Synthesized by Laser Ablation Technique 激光烧蚀技术合成纳米铂的抗菌和细胞毒活性研究

IF 1.4

Journal of Nanostructures Pub Date : 2021-01-01 DOI: 10.22052/JNS.2021.01.002

K. Madlum, E. J. Khamees, Shaymaa Abdulridha Ahmed, R. Naji

{"title":"Antimicrobial and Cytotoxic Activity of Platinum Nanoparticles Synthesized by Laser Ablation Technique","authors":"K. Madlum, E. J. Khamees, Shaymaa Abdulridha Ahmed, R. Naji","doi":"10.22052/JNS.2021.01.002","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.002","url":null,"abstract":"An ablative pulsed laser is an efficient physical technique for nanomaterial synthesis, particularly ablation of solids in liquid environments. This method is much simpler than chemical methods and produces highly purified nanoparticles with weak agglomeration effects. This study aimed to fabricate new nanoparticles with unique biological activity. Platinum nanoparticles (PtNPs) were prepared striking platinum plate with Nd-YAG (1064 nm) laser pulses in double deionized water (DDW) for a total number of pulses of (100 and 150). NPs samples were characterized using a Transmission Electron Microscope (TEM) and UV-Visible, double beam spectrophotometer. To evaluate the biological activity, three types of pathogenic microorganisms (Pseudomonas aeruginosa, Staphylococcus aureus, E. coli, and Candida albicans) and two cell lines (Hepa 1-6) hepatoma and MDCK cells were used. High-purity platinum nanoparticles (PtNPs) with two particle sizes (10 and 20 nm) have been successfully synthesized. The antimicrobial assay showed high anti-pseudomonas activity of these nanoparticles while it showed no effects on other organisms. PtNPs with a particle size of 10 nm showed higher toxicity than PtNPs with a particle size of (20 nm) at the same concentrations used. MTT assay showed that PtNPs have high cytotoxic effects on carcinoma cell lines at low concentrations. As a conclusion, PtNPs showed promising selective antibacterial activity against P. aeruginosa as well as an inhibitory effect on the cancer cell line. These nanoparticles can be used to treat complicated pseudomonas infections.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"13-19"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411616","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}

引用次数: 8

Facile Synthesis of Fe/ZnO Hollow Spheres Nanostructures by Green Approach for the Photodegradation and Removal of Organic Dye Contaminants in Water 绿色法快速合成Fe/ZnO空心球纳米结构光降解去除水中有机染料污染物

IF 1.4

Journal of Nanostructures Pub Date : 2021-01-01 DOI: 10.22052/JNS.2021.01.003

S. Mousavi, M. Golestaneh

{"title":"Facile Synthesis of Fe/ZnO Hollow Spheres Nanostructures by Green Approach for the Photodegradation and Removal of Organic Dye Contaminants in Water","authors":"S. Mousavi, M. Golestaneh","doi":"10.22052/JNS.2021.01.003","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.003","url":null,"abstract":"In this research, a facile and clean sonochemical synthesis was described for Fe/ZnO hollow spheres nanostructures as high-efficiency UV-Vis light photocatalyst through an environmentally-friendly procedure. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and field-emission scanning electron microscopy (FE-SEM) were utilized for the investigation of the produced Fe/ZnO hollow spheres nanostructures. Then, the photocatalytic activities of the catalysts were evaluated on the degradation of Methylene Blue and Congo Red in an aqueous solution under both UV and visible light irradiation (λ > 420 nm). Also, to illustrate the influence of morphologies on the degradation of these organic dyes, the Fe/ZnO nanostructures with the wood-like, flower-like, rod-like, and nanoparticle morphologies were synthesized and the photocatalyst efficiency of them was determined. The obtained results confirmed that the Fe/ZnO hollow spheres have significant photocatalytic activity compared to other morphologies and could be used as outstanding potential photocatalyst materials for removing dye pollutants from water.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"20-30"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411627","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}

引用次数: 0

Investigation of Mechanical Properties of Polyester/Polyethylene glycol/TiO2 Nanocomposites 聚酯/聚乙二醇/TiO2纳米复合材料力学性能研究

IF 1.4

Journal of Nanostructures Pub Date : 2021-01-01 DOI: 10.22052/JNS.2021.01.005

Samaneh Katebi Koushali, M. Hamadanian, A. Ghasemi, M. Ashrafi

{"title":"Investigation of Mechanical Properties of Polyester/Polyethylene glycol/TiO2 Nanocomposites","authors":"Samaneh Katebi Koushali, M. Hamadanian, A. Ghasemi, M. Ashrafi","doi":"10.22052/JNS.2021.01.005","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.005","url":null,"abstract":"In this paper, the effects of synthesized TiO2 nanoparticles and polyethylene glycol (PEG) on mechanical, morphological, and thermal properties of unsaturated polyester (UPE) based nanocomposites were studied. The TiO2 nanoparticles were synthesized by sol-gel method. The UPE/PEG/TiO2 nanocomposites were prepared at various concentrations of synthesized TiO2 nanoparticles and PEG by direct mechanical mixing technique. The synthesized TiO2 nanoparticles were mixed with UPE resin through ultra-sonication in different weight fractions (wt%), namely, 0 wt%, 0.5 wt%, 0.75 wt%, and 1 wt%. The PEG was considered in different wt% fractions such as 5 wt%, 10 wt%, 15 wt% for preparing UPE/PEG/TiO2 nanocomposite. Consequently, chemical structure of nanocomposite was investigated with FT-IR analyses. Also, the TiO2 nanoparticles and optimized samples were characterized by TGA, SEM and XRD analyses. The results obtained by TGA, FT-IR, SEM and XRD analyses exhibited an improvement of thermal and mechanical properties of the nanocomposites containing synthesized TiO2 nanoparticles (0.5 wt%) and PEG (10 wt%) compared to pristine polyester.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"38-47"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411746","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}

引用次数: 3

Enhanced Photocatalytic Degradation of 4-chlorophenol using Lanthanum Oxide Nano-particles under UVC/Vis Irradiation UVC/Vis辐照下氧化镧纳米颗粒光催化降解4-氯苯酚的研究

IF 1.4

Journal of Nanostructures Pub Date : 2021-01-01 DOI: 10.22052/JNS.2021.01.018

Z. Ghaedrahmat, M. Moussavi, S. Jorfi, Mehrnoosh Abtahi, N. Jaafarzadeh

{"title":"Enhanced Photocatalytic Degradation of 4-chlorophenol using Lanthanum Oxide Nano-particles under UVC/Vis Irradiation","authors":"Z. Ghaedrahmat, M. Moussavi, S. Jorfi, Mehrnoosh Abtahi, N. Jaafarzadeh","doi":"10.22052/JNS.2021.01.018","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.018","url":null,"abstract":"ABSTRACTPhotocatalytic oxidation using novel photo-catalysts has been considered as an effective method for destruction of recalcitrant organics. In this study, photocatalytic degradation of 4-chlorophenol (4-CP) using lanthanum Oxide nanoparticles (LONPs) was investigated under UVC/Vis irradiation. Effect of operational parameters including pH (2 – 11), catalyst content (250-3000 mg L-1), contact time (20 - 180 min) 4-CP concentration (25- 400 mgL-1) were investigated according to one factor at the time experimental procedure. Highest removal efficiency of 4-CP was observed at pH =7. Result was indicated that the removal of 4-CP was increased from 76% to 92%, with increasing catalyst dosage from 0.25 to 1 g L-1. Then, a decrease was observed in 4-CP removal with an enhancement in catalyst dosage from 1 to 3 g L-1. Highest 4-CP removal (98%) was observed at the initial concentration of 25 mg L-1. At the contact time from 20 to 60 min, removal efficiency of 4-CP was increased from 24% to 64%, respectively. The contact time was increased to 120 min, removal efficiency of 4-CP was increased to 100%. Therefore, the optimal reaction time was 100 min. The AOS indices was showed an increasing trend of mineralization. In other words, the process of degradation of 4-CP was improved with photocatalytic degradation by UVC-La2O3. Among the kinetic models, the pseudo-first order model due to the highest correlation coefficient of R2 = 0.991 for the La2O3-UVC process.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"165-180"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68412195","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}

引用次数: 1

CdO Nanoparticles: A Highly Effective Catalyst in Cyclocondensation Reaction of 3,4-Methylenedioxyphenol, Aromatic Aldehydes, and Active Methylene Compounds under Ultrasonic Irradiation 纳米CdO:超声辐照下3,4-亚甲二氧酚、芳香醛和活性亚甲基化合物环缩合反应的高效催化剂

IF 1.4

Journal of Nanostructures Pub Date : 2021-01-01 DOI: 10.22052/JNS.2021.01.007

Saman Dahi-Azar, Shahrzad Abdolmohammadi, J. Mokhtari

{"title":"CdO Nanoparticles: A Highly Effective Catalyst in Cyclocondensation Reaction of 3,4-Methylenedioxyphenol, Aromatic Aldehydes, and Active Methylene Compounds under Ultrasonic Irradiation","authors":"Saman Dahi-Azar, Shahrzad Abdolmohammadi, J. Mokhtari","doi":"10.22052/JNS.2021.01.007","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.007","url":null,"abstract":"In the last decades, metal oxide nanoparticles (NPs) have been used as inexpensive efficient heterogeneous catalysts in different chemical reactions, due to their favorable properties such as high available surface area, small loading of catalyst, convenient catalyst recycling, and degradation of environmental pollutants. An efficient synthesis of xanthenones and [1]benzopyrano[d]pyrimidinediones are achieved by cyclocondensation reaction of 3,4-methylenedioxyphenol, aromatic aldehydes, and active methylene compound including dimedone or 1,3-dimethylbarbituric acid using CdO NPs as a robust catalyst under ultrasonic irradiation in water at room temperature. The described catalyst was prepared successfully by a simple precipitation method and characterized by the Fourier transformed infrared absorption (FT-IR) spectroscopy, X-Ray diffraction (XRD) analytical technique, and scanning electron microscopy (SEM). All synthesized compounds were well characterized by IR, 1H and 13C NMR spectroscopy, and also by elemental analyses. The remarkable advantages of this protocol are high yields of products, short reaction times, use of simple and readily available starting materials, experimental simplicity, and applying the sonochemical method as an efficient method and innocuous tool for the synthesis of heterocycles.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"57-65"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68412010","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}

引用次数: 2

Structural, Optical and Magnetic Characterization of Vanadium Pentoxide Nanoparticles Synthesized in a Gelatin Medium 明胶介质中合成的五氧化二钒纳米颗粒的结构、光学和磁性表征

IF 1.4

Journal of Nanostructures Pub Date : 2021-01-01 DOI: 10.22052/JNS.2021.01.012

M. Mousavi, S. T. Yazdi, G. Khorrami

引用次数: 2

Nanostructured Tin Sulfide Thin Films: Preparation via Chemical Bath Deposition and Characterization 纳米结构硫化锡薄膜:化学浴沉积制备及表征

IF 1.4

Journal of Nanostructures Pub Date : 2021-01-01 DOI: 10.22052/JNS.2021.01.008

Rusul A. Ghaz, A. Ghazai, Zina M Shaban, K. Abass, N. Habubi, S. Chiad

{"title":"Nanostructured Tin Sulfide Thin Films: Preparation via Chemical Bath Deposition and Characterization","authors":"Rusul A. Ghaz, A. Ghazai, Zina M Shaban, K. Abass, N. Habubi, S. Chiad","doi":"10.22052/JNS.2021.01.008","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.008","url":null,"abstract":"Nanostructured tin sulfide (SnS) films were grown by chemical bath deposition (CBD) employing trisodium citrate (TSC) as complex agent. Investigation of the effect of different molar concentrations of TSC (0.10, 0.15 and 0.20 M) on the phases of SnS was done. Structure, morphology and optical properties were studied through the use of x-ray diffraction XRD, which proves that the as-prepared SnS films orthorhombic polycrystalline structure. XRD displays that peak of maximum intensity corresponds to the preferred orientation (002) of SnS films at TSC concentration 0.20 M. The decrement of average crystalline size values was due increment of TSC content. A study of SnS morphology indicates the presence of homogeneous grains, while when concentration of TSC of 0.20 M, the grains were not homogeneous and have different sizes. The AFM image showed that the grain size was observed in the area of 72.57 nm to 60.35 nm with concentration of TSC from 0.10 M to 0.20 M respectively. The results showed excellent optical transparency. The optical transmittance reduced from 95 to 80% with increasing TSC content. The ban gap was also reduced of 1.45 to 1.25 eV with increasing TSC content. The results refer that TCS act as a crucial role in the grown of SnS films.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"66-72"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411666","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}

引用次数: 0

Green Synthesis of CuO Nanostructures using Syzygium guineense (Willd.) DC Plant Leaf Extract and Their Applications 绿色合成氧化铜纳米结构的研究DC植物叶片提取物及其应用

IF 1.4

Journal of Nanostructures Pub Date : 2021-01-01 DOI: 10.22052/JNS.2021.01.010

Tegene Desalegn, H. Murthy, C. Ravikumar, H. P. Nagaswarupa

{"title":"Green Synthesis of CuO Nanostructures using Syzygium guineense (Willd.) DC Plant Leaf Extract and Their Applications","authors":"Tegene Desalegn, H. Murthy, C. Ravikumar, H. P. Nagaswarupa","doi":"10.22052/JNS.2021.01.010","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.010","url":null,"abstract":"The medicinal plant, Syzygium guineense (Willd.) DC (Waterberry) mediated green copper oxide nanostructures (SyG-CuO NSs) were successfully synthesized for the first time in Ethiopia. The antibacterial activity of CuO NSs capped by biomolecules of the plant leaf extract has been investigated. The UV-visible, UV-DRS, FT-IR, XRD, TGA-DTA, SEM, EDXA, TEM, HRTEM and SAED techniques were employed to characterize the NSs. The presence of two absorbance maxima, λmax1 and λmax2 at 423 nm and 451 nm, respectively confirms a mixture of copper oxide (Eg=1.93 eV). FTIR spectra confirmed the presence of biomolecules with SyG-CuO NSs. The XRD patterns of NSs confirmed the presence of CuO with high crystallinity. The purity of the NSs was confirmed by SEM-EDAX analysis. In addition, TEM-HRTEM-SAED analysis revealed the d-spacing value of 0.2854 nm which corresponds to CuO (111) lattice fringe. SyG-CuO NSs showed good antibacterial effect against both Gram-positive bacteria, S. aureus (12 mm), and Gram-negative bacteria, E. coli (12 mm), P. aeruginosa (10 mm), and E. aerogenes (12 mm). The bioactive compounds capped around the CuO NPs served the effective role in disrupting the cell wall of bacterial strains. The CV and EIS studies confirmed the better electrochemical properties for SyG-CuO with low charge transfer resistance value of 49 Ω. These CuO NSs exhibited multifunctional applications.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"81-94"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68412032","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}

引用次数: 9

Assembling a Bunch of Transition Metals Oxides on Sodium Montmorillonite Layer for Anionic Polymerization of Butyl Methyl Acrylate 在蒙脱土钠层上组装过渡金属氧化物用于阴离子聚合丙烯酸甲酯丁酯

IF 1.4

Journal of Nanostructures Pub Date : 2021-01-01 DOI: 10.22052/JNS.2021.01.001

Ameen Abdelrahman, A. Radwan, A. Zaki, A. Hamouda

引用次数: 0

A Novel Nanoformulation for Reducing the Toxicity and Increasing the Efficacy of Betulinic Acid Using Anionic Linear Globular Dendrimer 利用阴离子线性球状树突状分子制备白桦酸减毒增效纳米制剂

IF 1.4

Journal of Nanostructures Pub Date : 2021-01-01 DOI: 10.22052/JNS.2021.01.016

Tahereh Zadeh Mehrizi, N. Mosaffa, A. Khamesipour, M. Hoseini, H. E. Shahmabadi, M. Ardestani, Amitis Ramezani

引用次数: 0