Pub Date : 2021-01-01DOI: 10.22052/JNS.2021.01.011
Rosa Amini, G. Nabiyouni, Saghar Jarollahi
ZnS and iron oxide nanoparticles were first synthesized via precipitation and hydrothermal methods respectively. Fe3O4/ZnS nano-composites were then prepared using precipitation method. The prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR) spectroscopy. Vibrating sample magnetometer (VSM) was used to study the magnetic property of the products. The photo-catalytic behaviour of Fe3O4/ZnS nano-composites was evaluated using the degradation of three azo-dyes under ultraviolet light irradiation. The results illustrate super paramagnetic and ferromagnetic behaviour of Fe3O4 nanoparticles. The photo catalytic behaviour of Fe3O4/ZnS nano-composites was evaluated using the degradation of three various azo dyes under ultraviolet light irradiation. The results show that, the prepared nano-composites are applicable for magnetic and photo catalytic performance.ZnS and iron oxide nanoparticles were first synthesized via precipitation and hydrothermal methods respectively. Fe3O4/ZnS nano-composites were then prepared using precipitation method. The prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR) spectroscopy. Vibrating sample magnetometer (VSM) was used to study the magnetic property of the products. The photo-catalytic behaviour of Fe3O4/ZnS nano-composites was evaluated using the degradation of three azo-dyes under ultraviolet light irradiation. The results illustrate super paramagnetic and ferromagnetic behaviour of Fe3O4 nanoparticles. The photo catalytic behaviour of Fe3O4/ZnS nano-composites was evaluated using the degradation of three various azo dyes under ultraviolet light irradiation. The results show that, the prepared nano-composites are applicable for magnetic and photo catalytic performance.
{"title":"Removal of azo dyes pollutants: Photo catalyst and magnetic investigation of iron oxide-zinc sulfide nanocomposites","authors":"Rosa Amini, G. Nabiyouni, Saghar Jarollahi","doi":"10.22052/JNS.2021.01.011","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.011","url":null,"abstract":"ZnS and iron oxide nanoparticles were first synthesized via precipitation and hydrothermal methods respectively. Fe3O4/ZnS nano-composites were then prepared using precipitation method. The prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR) spectroscopy. Vibrating sample magnetometer (VSM) was used to study the magnetic property of the products. The photo-catalytic behaviour of Fe3O4/ZnS nano-composites was evaluated using the degradation of three azo-dyes under ultraviolet light irradiation. The results illustrate super paramagnetic and ferromagnetic behaviour of Fe3O4 nanoparticles. The photo catalytic behaviour of Fe3O4/ZnS nano-composites was evaluated using the degradation of three various azo dyes under ultraviolet light irradiation. The results show that, the prepared nano-composites are applicable for magnetic and photo catalytic performance.ZnS and iron oxide nanoparticles were first synthesized via precipitation and hydrothermal methods respectively. Fe3O4/ZnS nano-composites were then prepared using precipitation method. The prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR) spectroscopy. Vibrating sample magnetometer (VSM) was used to study the magnetic property of the products. The photo-catalytic behaviour of Fe3O4/ZnS nano-composites was evaluated using the degradation of three azo-dyes under ultraviolet light irradiation. The results illustrate super paramagnetic and ferromagnetic behaviour of Fe3O4 nanoparticles. The photo catalytic behaviour of Fe3O4/ZnS nano-composites was evaluated using the degradation of three various azo dyes under ultraviolet light irradiation. The results show that, the prepared nano-composites are applicable for magnetic and photo catalytic performance.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"95-104"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68412102","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 : 2021-01-01DOI: 10.22052/JNS.2021.01.006
Hannaneh Heidari, M. Karbalaee
We reported that the ultrasonically synthesized nanocrystalline cellulose (NCC) from microcrystalline cellulose has the capacity for use as natural and green matrices for the synthesis of silver nanoparticles. Cationic surfactant cetyltrimethylammonium bromide (CTAB) was employed as a modifier and stabilizer for NCC. The structure of as-synthesized composite (Ag/CTAB/NCC) was characterized by Fourier transform infrared spectroscopy (FT-IR); field emission scanning electron microscopy (FE-SEM); Transmission electron microscopy (TEM); Energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The XRD pattern confirmed the single cubic phase of Ag nanoparticles with a crystallite size of about 30 nm. The catalytic activity of Ag/CTAB/NCC has been analyzed by performing the reduction of certain toxic azo methyl orange dye (MO) (by two methods) and aromatic nitro compound of 4- nitrophenol (4-NP) in shorter time. The reduction of MO to hydrazine derivatives and 4-NP to 4-aminophenol takes place with pseudo-first-order rate constants. The reduction time regularly decreased and the rate of reduction (k) increases (3 fold) with increasing catalyst amount in method (2) (mmol NaBH4/mmol MO = 250 and 42 mg catalyst) compared to the method (1) (mmol NaBH4/mmol MO = 400 and 5 mg catalyst). The results indicated that spherical AgNPs immobilized CTAB-adsorbed NCC showed better catalytic activity and shorter reduction time towards the removal of methyl orange (k = 14.2 × 10-3 s-1, t =150 s) and 4-nitrophenol (k = 5.4 × 10-3 s-1, t = 180 s) compared with previous works that could be introduced as an effective method for the catalytic treatment of wastewater.
本文报道了由微晶纤维素超声合成的纳米晶纤维素(NCC)具有作为天然和绿色基质用于合成纳米银的能力。采用阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)作为NCC的改性剂和稳定剂。用傅里叶变换红外光谱(FT-IR)对合成的Ag/CTAB/NCC进行了结构表征;场发射扫描电镜;透射电镜;能谱(EDS)和x射线衍射(XRD)。XRD谱图证实银纳米颗粒为单立方相，晶粒尺寸约为30 nm。通过两种方法在较短时间内还原某些有毒偶氮甲基橙染料(MO)和4-硝基酚(4- np)的芳香硝基化合物，分析了Ag/CTAB/NCC的催化活性。MO还原为联氨衍生物，4-NP还原为4-氨基苯酚的过程具有准一级速率常数。方法(2)(mmol NaBH4/mmol MO = 250，催化剂42 mg)与方法(1)(mmol NaBH4/mmol MO = 400，催化剂5 mg)相比，随着催化剂用量的增加，还原时间有规律地缩短，还原速率(k)提高了3倍。结果表明，球形AgNPs固定化ctab吸附的NCC对甲基橙(k = 14.2 × 10-3 s-1, t =150 s)和4-硝基苯酚(k = 5.4 × 10-3 s-1, t = 180 s)的去除具有较好的催化活性和较短的还原时间，可作为一种有效的废水催化处理方法。
{"title":"Silver-nanoparticle Supported on Nanocrystalline Cellulose using Cetyltrimethylammonium Bromide: Synthesis and Catalytic Performance for Decolorization of Dyes","authors":"Hannaneh Heidari, M. Karbalaee","doi":"10.22052/JNS.2021.01.006","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.006","url":null,"abstract":"We reported that the ultrasonically synthesized nanocrystalline cellulose (NCC) from microcrystalline cellulose has the capacity for use as natural and green matrices for the synthesis of silver nanoparticles. Cationic surfactant cetyltrimethylammonium bromide (CTAB) was employed as a modifier and stabilizer for NCC. The structure of as-synthesized composite (Ag/CTAB/NCC) was characterized by Fourier transform infrared spectroscopy (FT-IR); field emission scanning electron microscopy (FE-SEM); Transmission electron microscopy (TEM); Energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The XRD pattern confirmed the single cubic phase of Ag nanoparticles with a crystallite size of about 30 nm. The catalytic activity of Ag/CTAB/NCC has been analyzed by performing the reduction of certain toxic azo methyl orange dye (MO) (by two methods) and aromatic nitro compound of 4- nitrophenol (4-NP) in shorter time. The reduction of MO to hydrazine derivatives and 4-NP to 4-aminophenol takes place with pseudo-first-order rate constants. The reduction time regularly decreased and the rate of reduction (k) increases (3 fold) with increasing catalyst amount in method (2) (mmol NaBH4/mmol MO = 250 and 42 mg catalyst) compared to the method (1) (mmol NaBH4/mmol MO = 400 and 5 mg catalyst). The results indicated that spherical AgNPs immobilized CTAB-adsorbed NCC showed better catalytic activity and shorter reduction time towards the removal of methyl orange (k = 14.2 × 10-3 s-1, t =150 s) and 4-nitrophenol (k = 5.4 × 10-3 s-1, t = 180 s) compared with previous works that could be introduced as an effective method for the catalytic treatment of wastewater.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"48-56"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411880","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 : 2021-01-01DOI: 10.22052/JNS.2021.01.014
Najmeh Atoub, A. Amiri, Alireza Badiei, J. Ghasemi
There is a huge scope for the removal of heavy metal ions from aqueous solutions. In this study, mesoporous silica materials, (MSMs), functionalized with (3-Mercaptopropyl) trimethoxysilane, (MPTS/MSMs), were prepared and used for adsorption of Pb(II) ions from aqueous solutions. The synthesis of MPTS/MSMs adsorbent was done using one-pot hydrothermal method by immobilizing 3-Mercaptopropyl trimethoxysilane onto mesoporous silica surface. The structure and properties of the adsorbent were explored using different techniques such as FT-IR, XRD, SEM, TEM, TGA, and N2 adsorption-desorption isotherms. The adsorption applicability of prepared nanostructure for removal of the Pb(II) ions from the aqueous solution was investigated and the results showed a good selectivity in the absorption of Pb(II) ions over other ions in aqueous solution. The effect of different parameters including the solution pH, Pb(II) concentration, sorbent amount, ion interfering effect, and the contact time onto the removal efficiency of the adsorbent was investigated systematically. The maximum adsorption efficiency (~ 97%) was found for the solutions with pH = 6, the best contact time was seen as 30 min for 50 mg L−1 of the analyte under the optimal conditions. The adsorbent was triumphantly used for the removal of Pb (II) ions from the three real water samples, including tap water, well water, and lake water with the removal efficiency of > 95%.
{"title":"One-Pot Hydrothermal Synthesis of Functionalized Mesoporous Silica for Effective Removal of Pb(II) Ion","authors":"Najmeh Atoub, A. Amiri, Alireza Badiei, J. Ghasemi","doi":"10.22052/JNS.2021.01.014","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.014","url":null,"abstract":"There is a huge scope for the removal of heavy metal ions from aqueous solutions. In this study, mesoporous silica materials, (MSMs), functionalized with (3-Mercaptopropyl) trimethoxysilane, (MPTS/MSMs), were prepared and used for adsorption of Pb(II) ions from aqueous solutions. The synthesis of MPTS/MSMs adsorbent was done using one-pot hydrothermal method by immobilizing 3-Mercaptopropyl trimethoxysilane onto mesoporous silica surface. The structure and properties of the adsorbent were explored using different techniques such as FT-IR, XRD, SEM, TEM, TGA, and N2 adsorption-desorption isotherms. The adsorption applicability of prepared nanostructure for removal of the Pb(II) ions from the aqueous solution was investigated and the results showed a good selectivity in the absorption of Pb(II) ions over other ions in aqueous solution. The effect of different parameters including the solution pH, Pb(II) concentration, sorbent amount, ion interfering effect, and the contact time onto the removal efficiency of the adsorbent was investigated systematically. The maximum adsorption efficiency (~ 97%) was found for the solutions with pH = 6, the best contact time was seen as 30 min for 50 mg L−1 of the analyte under the optimal conditions. The adsorbent was triumphantly used for the removal of Pb (II) ions from the three real water samples, including tap water, well water, and lake water with the removal efficiency of > 95%.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"125-135"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68412397","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 : 2021-01-01DOI: 10.22052/JNS.2021.01.009
Rahmad Syah, Amjad Hussein Altajer, O. Rasheed, F. Tanjung, Aseel M. Aljeboree, N. A. Alrazzak, A. Alkaim
There are several sources of water contamination. One of the most important pollutant of water is azo dyes-based waste which produced by textile, paper and dye industrials. At this work, the morphological engineered CuMoO4/ ZnO Nanocomposites are prepared via simple and fast hydrothermal-microwave method and applied it as a photocaalyst for degradation of water pollutants. Prepared products is characterized with X-ray diffraction (XRD) analysis, Fourier-transform infrared spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), Ultra violet-Visible (UV-Vis) spectroscopy. The results confirms that size and shape of prepared products is homogenous wih narrow size distribution. In the next step, prepared ZnO, CuMoO4, and ZnO/CuMoO4 nanocomposites were used as catalyst for photodegradation of methylene blue and Rhodamine B. Results showed that ZnO/CuMoO4 nanocomposites have excellent photocatalytic performance. Results indicated that prepared ZnO/CuMoO4 nanocomposites can be degraded 92 and 84% of methylene blue and Rhodamine B under UV irradiation after 70 minutes. The charge transfer from CuMoO4 to ZnO is confirmed by the optical characteristics of ZnO/CuMoO4 nanocomposites. As a result, the potential of electron-hole recombination in CuMoO4 decreases, resulting in holes in the valance band that combine with OH groups on the surface of nanocomposites to form highly reactive OH• radicals. The radicals are damaged when they come into contact with Rhodamine B and Methylene blue.
{"title":"CuMoO4/ ZnO Nanocomposites: Novel Synthesis, Characterization, and Photocatalytic Performance","authors":"Rahmad Syah, Amjad Hussein Altajer, O. Rasheed, F. Tanjung, Aseel M. Aljeboree, N. A. Alrazzak, A. Alkaim","doi":"10.22052/JNS.2021.01.009","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.009","url":null,"abstract":"There are several sources of water contamination. One of the most important pollutant of water is azo dyes-based waste which produced by textile, paper and dye industrials. At this work, the morphological engineered CuMoO4/ ZnO Nanocomposites are prepared via simple and fast hydrothermal-microwave method and applied it as a photocaalyst for degradation of water pollutants. Prepared products is characterized with X-ray diffraction (XRD) analysis, Fourier-transform infrared spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), Ultra violet-Visible (UV-Vis) spectroscopy. The results confirms that size and shape of prepared products is homogenous wih narrow size distribution. In the next step, prepared ZnO, CuMoO4, and ZnO/CuMoO4 nanocomposites were used as catalyst for photodegradation of methylene blue and Rhodamine B. Results showed that ZnO/CuMoO4 nanocomposites have excellent photocatalytic performance. Results indicated that prepared ZnO/CuMoO4 nanocomposites can be degraded 92 and 84% of methylene blue and Rhodamine B under UV irradiation after 70 minutes. The charge transfer from CuMoO4 to ZnO is confirmed by the optical characteristics of ZnO/CuMoO4 nanocomposites. As a result, the potential of electron-hole recombination in CuMoO4 decreases, resulting in holes in the valance band that combine with OH groups on the surface of nanocomposites to form highly reactive OH• radicals. The radicals are damaged when they come into contact with Rhodamine B and Methylene blue.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"73-80"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411909","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 : 2021-01-01DOI: 10.22052/JNS.2021.01.015
B. A. Jabar, H. M. Yaseen, M. A. Hamzah, K. J. Tahir, N. Ridha, F. Alosfur, Rajaa A. Madlol, Basheer M. Hussein
Pure and doped TiO2 with Eu3+ nanoparticles were prepared by a novel and simple preparation method. The pure TiO2 nanoparticles and the doping TiO2 with the Eu3+ ions prepared at room temperature by the sol-gel method via the reaction of Titanium (IV) isopropoxide (TTIP) with an aqueous solution of hydrochloric acidic in the presence of ethanol. The crystal structure of the prepared nanoparticles was investigated by X-Ray Diffraction (XRD) while the morphology of the samples was investigated by Field Emission Scanning Electron Microscopy (FESEM). All the prepared samples having excellent crystalline. As well, XRD proved that doping TiO2 with Eu3+ reduced the crystallite size. The FESEM images showed that the doping of TiO2 with Eu3+ results in larger particle sizes. In the present work, the effects of doping, particle size, and stabilization of the anatase phase were studied. As well as the deceleration of crystal growth by the rare-earth-doped into TiO2 host was investigated.
{"title":"Synthesis and Structural Properties of Eu3+:TiO2 Nanoparticles","authors":"B. A. Jabar, H. M. Yaseen, M. A. Hamzah, K. J. Tahir, N. Ridha, F. Alosfur, Rajaa A. Madlol, Basheer M. Hussein","doi":"10.22052/JNS.2021.01.015","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.015","url":null,"abstract":"Pure and doped TiO2 with Eu3+ nanoparticles were prepared by a novel and simple preparation method. The pure TiO2 nanoparticles and the doping TiO2 with the Eu3+ ions prepared at room temperature by the sol-gel method via the reaction of Titanium (IV) isopropoxide (TTIP) with an aqueous solution of hydrochloric acidic in the presence of ethanol. The crystal structure of the prepared nanoparticles was investigated by X-Ray Diffraction (XRD) while the morphology of the samples was investigated by Field Emission Scanning Electron Microscopy (FESEM). All the prepared samples having excellent crystalline. As well, XRD proved that doping TiO2 with Eu3+ reduced the crystallite size. The FESEM images showed that the doping of TiO2 with Eu3+ results in larger particle sizes. In the present work, the effects of doping, particle size, and stabilization of the anatase phase were studied. As well as the deceleration of crystal growth by the rare-earth-doped into TiO2 host was investigated.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"136-142"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68412452","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 : 2021-01-01DOI: 10.22052/JNS.2021.01.019
S. G. Al-Shawi, N. Alekhina, S. Aravindhan, L. Thangavelu, Akulina Elena, N. V. Kartamysheva, R. Zakieva
The human life is faced with bacterial infections which are one of the major cause of prevalence and mortality. Antibiotics have long been the preferred therapy for bacterial infections due to their cost-effectiveness and efficacy. In the field of overcoming microbial issues, new and emerging nanostructure-based materials have gotten a lot of attention. In this Study, NiO and sulfur, and nitrogen co doped-graphene quantum dots-decorated NiO nanocomposites (S,N-GQDs/NiO) are prepared via a simple hydrothermal method. Structural and morphological properties of products are determined via XRD, SEM, UV-Vis, and FTIR analysis. The prepared products are applied for the investigation of antibacterial activity against Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus, and methicillin resistant Staphylococcus aureus (MRSA). The results showed that prepared S,N-GQDs/NiO nanocomposites have high antibacterial activity against Staphylococcus aureus among a wide range of microorganisms. For S,N-GQDs/NiO nanocomposites nanoparticles, the disk diffusion test proved that the highest growth inhibition zone was related to Staphylococcus aureus (17 mm). The presence of graphene quantum dots in S,N-GQDs/NiO nanocomposites facilitates reactive oxygen species (ROS) mechanism which lead to bet antibacterial activity.
{"title":"Synthesis of NiO Nanoparticles and Sulfur, and Nitrogen co Doped-Graphene Quantum Dots/ NiO Nanocomposites for Antibacterial Application","authors":"S. G. Al-Shawi, N. Alekhina, S. Aravindhan, L. Thangavelu, Akulina Elena, N. V. Kartamysheva, R. Zakieva","doi":"10.22052/JNS.2021.01.019","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.019","url":null,"abstract":"The human life is faced with bacterial infections which are one of the major cause of prevalence and mortality. Antibiotics have long been the preferred therapy for bacterial infections due to their cost-effectiveness and efficacy. In the field of overcoming microbial issues, new and emerging nanostructure-based materials have gotten a lot of attention. In this Study, NiO and sulfur, and nitrogen co doped-graphene quantum dots-decorated NiO nanocomposites (S,N-GQDs/NiO) are prepared via a simple hydrothermal method. Structural and morphological properties of products are determined via XRD, SEM, UV-Vis, and FTIR analysis. The prepared products are applied for the investigation of antibacterial activity against Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus, and methicillin resistant Staphylococcus aureus (MRSA). The results showed that prepared S,N-GQDs/NiO nanocomposites have high antibacterial activity against Staphylococcus aureus among a wide range of microorganisms. For S,N-GQDs/NiO nanocomposites nanoparticles, the disk diffusion test proved that the highest growth inhibition zone was related to Staphylococcus aureus (17 mm). The presence of graphene quantum dots in S,N-GQDs/NiO nanocomposites facilitates reactive oxygen species (ROS) mechanism which lead to bet antibacterial activity.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"181-188"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68412314","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 : 2021-01-01DOI: 10.22052/JNS.2021.01.013
Mostafa Shafiee, S. H. Ghoran, S. Bordbar, M. Gholami, M. Naderian, Fatemeh Dehghani, A. Amani
The use of core-shell nanoparticles as controlled drug delivery vehicles has proven successful, yet their production and application require costly and toxic chemicals. We hereby use a natural glycosylated flavonoid (rutin) for synthesis of a nanocarrier for doxorubicin delivery. For this target, a convenient two-step synthesis was processed including a synthesis of bio-zinc ferrite nanoparticles without N2 gas and chitosan coating (CS; bio-zincferrite@chitosan). The as-synthesized magnetic nanogel was characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transformed infrared (FT-IR) spectroscopy, and electro-analytical methods including cyclic voltammetry and electrochemical impedance spectroscopies. The collapse/swell potential of the coated CS layers of the bio-NPs were found to be responsible for the observed pH dependence of doxorubicin delivery. Results exhibited the drug release of bio-nanogel can be induced at pH ranging from 6 to 7. Therefore, capacity and efficiency parameters of the anti-cancer drug onto the NPs were obtained as equal to 43.5% and 78.6%. The present work provides a simple method to fabricate smart pH-responsive nanogel for cancer therapy.
{"title":"Rutin: a Flavonoid Precursor for Synthesis of ZnFe2O4 Nanoparticles; Electrochemical Study of Zinc Ferrite-chitosan Nanogel for Doxorubicin Delivery","authors":"Mostafa Shafiee, S. H. Ghoran, S. Bordbar, M. Gholami, M. Naderian, Fatemeh Dehghani, A. Amani","doi":"10.22052/JNS.2021.01.013","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.013","url":null,"abstract":"The use of core-shell nanoparticles as controlled drug delivery vehicles has proven successful, yet their production and application require costly and toxic chemicals. We hereby use a natural glycosylated flavonoid (rutin) for synthesis of a nanocarrier for doxorubicin delivery. For this target, a convenient two-step synthesis was processed including a synthesis of bio-zinc ferrite nanoparticles without N2 gas and chitosan coating (CS; bio-zincferrite@chitosan). The as-synthesized magnetic nanogel was characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transformed infrared (FT-IR) spectroscopy, and electro-analytical methods including cyclic voltammetry and electrochemical impedance spectroscopies. The collapse/swell potential of the coated CS layers of the bio-NPs were found to be responsible for the observed pH dependence of doxorubicin delivery. Results exhibited the drug release of bio-nanogel can be induced at pH ranging from 6 to 7. Therefore, capacity and efficiency parameters of the anti-cancer drug onto the NPs were obtained as equal to 43.5% and 78.6%. The present work provides a simple method to fabricate smart pH-responsive nanogel for cancer therapy.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"114-124"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68412296","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 : 2021-01-01DOI: 10.22052/JNS.2021.01.020
M. Maleki, Z. Hadian, K. Abdi, Paliz Koohy-Kamaly, F. Bahmanyar
In general, β-cyclodextrin (β-CD) is widely used in various technologies of the food industries. The aims of this study were preparation, characterization and optimization of a novel nanosize formulation of β-CD NPs loaded with GR. In the current study optimum conditions for maximum encapsulation efficiency and loading of geraniol using response surface methodology (RSM) was assessed. Furthermore, the in-vitro antimicrobial activities against S. aureus, B. cereus, S. enteritidis, E. coli, C. albicans and A. niger were studied. The present study is the first to investigate the antimicrobial activity of the GR inclusion complexes in nanosize formulations. The GR complexes were evaluated using scanning electron microscopy (SEM), infrared (IR) spectroscopy and differential scanning calorimetry (DSC). Furthermore, antimicrobial activity of the inclusion complexes (IC) against bacteria and fungi were assessed. Minimum inhibitory concentrations (MIC) and inhibition zones of the GR-β-CD inclusion complexes were calculated using agar/broth dilution and agar well-diffusion methods. The EE and loading values of the optimized formulation included 87.25 and 10.45%, respectively, with a size distribution of 117 nm ±1 and appropriate particle size distribution (PDI). Moreover, SEM, IR and DSC verified fabrication of inclusion complexes between GR and β-CD. The inhibition zones of β-CD-GR complexes were recorded as the following order: Bacillus cereus > Staphylococcus aureus > Salmonella entritidis > Escherichia coli. The RSM technique allowed to prepare geraniol nanoinclusion complexes using β-cyclodextrin with optimum responses. The antimicrobial activity of GR highly enhanced after efficient complexation. This study generates appropriate information for application of inclusion complexes of GR.
{"title":"Study of the Physicochemical Properties and Antimicrobial Activities of Nanoparticles Containing β-Cyclodextrin and Geranial","authors":"M. Maleki, Z. Hadian, K. Abdi, Paliz Koohy-Kamaly, F. Bahmanyar","doi":"10.22052/JNS.2021.01.020","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.020","url":null,"abstract":"In general, β-cyclodextrin (β-CD) is widely used in various technologies of the food industries. The aims of this study were preparation, characterization and optimization of a novel nanosize formulation of β-CD NPs loaded with GR. In the current study optimum conditions for maximum encapsulation efficiency and loading of geraniol using response surface methodology (RSM) was assessed. Furthermore, the in-vitro antimicrobial activities against S. aureus, B. cereus, S. enteritidis, E. coli, C. albicans and A. niger were studied. The present study is the first to investigate the antimicrobial activity of the GR inclusion complexes in nanosize formulations. The GR complexes were evaluated using scanning electron microscopy (SEM), infrared (IR) spectroscopy and differential scanning calorimetry (DSC). Furthermore, antimicrobial activity of the inclusion complexes (IC) against bacteria and fungi were assessed. Minimum inhibitory concentrations (MIC) and inhibition zones of the GR-β-CD inclusion complexes were calculated using agar/broth dilution and agar well-diffusion methods. The EE and loading values of the optimized formulation included 87.25 and 10.45%, respectively, with a size distribution of 117 nm ±1 and appropriate particle size distribution (PDI). Moreover, SEM, IR and DSC verified fabrication of inclusion complexes between GR and β-CD. The inhibition zones of β-CD-GR complexes were recorded as the following order: Bacillus cereus > Staphylococcus aureus > Salmonella entritidis > Escherichia coli. The RSM technique allowed to prepare geraniol nanoinclusion complexes using β-cyclodextrin with optimum responses. The antimicrobial activity of GR highly enhanced after efficient complexation. This study generates appropriate information for application of inclusion complexes of GR.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"189-201"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68412660","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 : 2021-01-01DOI: 10.22052/JNS.2021.01.004
Mahya Tamiji, Ali Reza Ahmadian-Fard-Fini, Manouchehr Behzadi, D. Ghanbari
In this work firstly magnesium hydroxide (Mg(OH)2) and aluminum hydroxide (Al(OH)3) were prepared using sono-chemical reaction at solvent of water without applying any surface active agent. Effect of various sono-chemistry parameters such as power, cycles, time and volume on the size and shape of nanostructures were investigated. Secondly nanoparticles were modified and coated by ethyl cellulose capping agent. Modified nanoparticles were added to cellulose acetate and surface of wood for investigation of flame retardancy. Thermal stability were characterized by thermal gravimetric analysis (TGA). Flame retardancy were examined by UL-94 and heat release tests.
{"title":"Sonochemical Preparation of Magnesium Hydroxide and Aluminum Hydroxide Nanoparticles for Flame Retardancy and Thermal Stability of Cellulose Acetate and Wood","authors":"Mahya Tamiji, Ali Reza Ahmadian-Fard-Fini, Manouchehr Behzadi, D. Ghanbari","doi":"10.22052/JNS.2021.01.004","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.004","url":null,"abstract":"In this work firstly magnesium hydroxide (Mg(OH)2) and aluminum hydroxide (Al(OH)3) were prepared using sono-chemical reaction at solvent of water without applying any surface active agent. Effect of various sono-chemistry parameters such as power, cycles, time and volume on the size and shape of nanostructures were investigated. Secondly nanoparticles were modified and coated by ethyl cellulose capping agent. Modified nanoparticles were added to cellulose acetate and surface of wood for investigation of flame retardancy. Thermal stability were characterized by thermal gravimetric analysis (TGA). Flame retardancy were examined by UL-94 and heat release tests.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"31-37"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411671","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 : 2021-01-01DOI: 10.22052/JNS.2021.01.017
M. Jafari, Zeynab Sadat Alirahmi, D. Ghanbari
CdSe and CdTe quantum dots were synthesized by a simple hydrothermal method using ammonia and hydrazine in a short time period of 5 hours. In another phase, Znq2 complex nanostructures were prepared using a green environmentally friendly method, in which saffron extract was used as surfactant. The purity of the nanoparticles was investigated by X-ray diffraction and their dimensions and morphology were studied by scanning electron microscopy. In the next step, CdSe and Znq2 complexes were synthesized and their synergistic effects on each other was investigated. The photoluminescence results show the luminescence of all three nanostructures in the visible light range, and it was concluded that upon compositing these nanostructures, their luminescence properties remained intact. Their optical and structural properties were investigated using X-ray diffraction (XRD) analysis, infrared spectroscopy (FT-IR), ultraviolet and visible light (UV-Visible) spectroscopy, photoluminescence spectroscopy (PL) and electron imaging (SEM).Key Words: Synthesis of Quantum Dots, Znq2 Complex, Organic Light Emitting Diode
{"title":"Synthesis of CdSe and CdTe Quantum Dots: Their Effects on the Znq2 Luminescence Complex for Organic Light Emitting Diodes","authors":"M. Jafari, Zeynab Sadat Alirahmi, D. Ghanbari","doi":"10.22052/JNS.2021.01.017","DOIUrl":"https://doi.org/10.22052/JNS.2021.01.017","url":null,"abstract":"CdSe and CdTe quantum dots were synthesized by a simple hydrothermal method using ammonia and hydrazine in a short time period of 5 hours. In another phase, Znq2 complex nanostructures were prepared using a green environmentally friendly method, in which saffron extract was used as surfactant. The purity of the nanoparticles was investigated by X-ray diffraction and their dimensions and morphology were studied by scanning electron microscopy. In the next step, CdSe and Znq2 complexes were synthesized and their synergistic effects on each other was investigated. The photoluminescence results show the luminescence of all three nanostructures in the visible light range, and it was concluded that upon compositing these nanostructures, their luminescence properties remained intact. Their optical and structural properties were investigated using X-ray diffraction (XRD) analysis, infrared spectroscopy (FT-IR), ultraviolet and visible light (UV-Visible) spectroscopy, photoluminescence spectroscopy (PL) and electron imaging (SEM).Key Words: Synthesis of Quantum Dots, Znq2 Complex, Organic Light Emitting Diode","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"11 1","pages":"153-164"},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68412140","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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