Pub Date : 2016-05-01DOI: 10.7508/IJND.2016.02.002
S. Hamidreza, Shahryari Ghoshekandi Ramin, Masjedi Ali, M. Zahra, Kazemi Maraym
Carbon nanotubes (CNTs) are a novel material that exhibits good adsorption behavior toward various toxic pollutants in aqueous solution. These adsorbents have a fast adsorption rate and high adsorption efficiency, efficient to remove various pollutants and they are easy to recover and reuse. These features highlight the suitability of CNTs for the treatment of water polluted with heavy metal ions and dyes. This review outlines the preparation of CNTs as well as different methods of surface modification of these materials by non-covalent and covalent functionalization strategies. Additionally, an overview of recent developments and applications of CNTs for heavy metal ions and dyes pollutant removal is discussed in detail. Based on current research and existing materials, some new and futuristic approaches in this fascinating area are also discussed. The main objective of this review is to provide up-to-date information about the most important features of CNTs and to show their advantages as adsorbents in the treatment of polluted aqueous solutions.
{"title":"A review on Carbon nanotubes adsorbents for the removal of pollutants from aqueous solutions","authors":"S. Hamidreza, Shahryari Ghoshekandi Ramin, Masjedi Ali, M. Zahra, Kazemi Maraym","doi":"10.7508/IJND.2016.02.002","DOIUrl":"https://doi.org/10.7508/IJND.2016.02.002","url":null,"abstract":"Carbon nanotubes (CNTs) are a novel material that exhibits good adsorption behavior toward various toxic pollutants in aqueous solution. These adsorbents have a fast adsorption rate and high adsorption efficiency, efficient to remove various pollutants and they are easy to recover and reuse. These features highlight the suitability of CNTs for the treatment of water polluted with heavy metal ions and dyes. This review outlines the preparation of CNTs as well as different methods of surface modification of these materials by non-covalent and covalent functionalization strategies. Additionally, an overview of recent developments and applications of CNTs for heavy metal ions and dyes pollutant removal is discussed in detail. Based on current research and existing materials, some new and futuristic approaches in this fascinating area are also discussed. The main objective of this review is to provide up-to-date information about the most important features of CNTs and to show their advantages as adsorbents in the treatment of polluted aqueous solutions.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73277310","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 : 2016-05-01DOI: 10.7508/IJND.2016.02.004
Zainab Tohidian, I. Sheikhshoaie, M. Khaleghi
A B S T RA C T : New two nano- sized Schiff base complexes [M(L)], where L= 2, 2'-((1E, 1E')-(1, 2 phenylen bis (azanylylidene)) bis (methanylylidene)) bis (4-bromo phenolato) and M=Cu or Zn, (a, b complexes) were synthesized by ultrasonic irradiation. These complexes were characterized by elemental analysis, molar conductivity, FT-IR, fluorescence emission, 1 H NMR, field emission scanning electron spectroscopy (FESEM) and UV-Vis spectroscopy. The UV-Vis spectroscopic data and fluorescence emission bands of these nano-sized Schiff base complexes show a shift in comparison with the bulk sample analogue, due to the reduction in particle size to nano scale. In vitro antimicrobial activities of the title compounds against some Gram-positive (Staphylococcus aureus, Micrococcus luteus, Bacillus cereus, Eterococcus faecalis) and Gram-negative bacteria (Pseudomonas aeruginosa, Escherichia coli, Klebsiella sp, Pscudomonas sp) and fungus strain (Candida albicans) were investigated and compared with each other. It was found that Cu (II) complex showed higher antibacterial activity than the Zn (II) complex.
{"title":"Two new Cu(II) and Zn(II) Schiff base complexes: Synthesis, characterization and their biological activity","authors":"Zainab Tohidian, I. Sheikhshoaie, M. Khaleghi","doi":"10.7508/IJND.2016.02.004","DOIUrl":"https://doi.org/10.7508/IJND.2016.02.004","url":null,"abstract":"A B S T RA C T : New two nano- sized Schiff base complexes [M(L)], where L= 2, 2'-((1E, 1E')-(1, 2 phenylen bis (azanylylidene)) bis (methanylylidene)) bis (4-bromo phenolato) and M=Cu or Zn, (a, b complexes) were synthesized by ultrasonic irradiation. These complexes were characterized by elemental analysis, molar conductivity, FT-IR, fluorescence emission, 1 H NMR, field emission scanning electron spectroscopy (FESEM) and UV-Vis spectroscopy. The UV-Vis spectroscopic data and fluorescence emission bands of these nano-sized Schiff base complexes show a shift in comparison with the bulk sample analogue, due to the reduction in particle size to nano scale. In vitro antimicrobial activities of the title compounds against some Gram-positive (Staphylococcus aureus, Micrococcus luteus, Bacillus cereus, Eterococcus faecalis) and Gram-negative bacteria (Pseudomonas aeruginosa, Escherichia coli, Klebsiella sp, Pscudomonas sp) and fungus strain (Candida albicans) were investigated and compared with each other. It was found that Cu (II) complex showed higher antibacterial activity than the Zn (II) complex.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85518436","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 : 2016-05-01DOI: 10.7508/IJND.2016.02.009
P. Dave, P. N. Ram, S. Chaturvedi
Composite solid propellants were prepared with and without nano-alloys (Ti-Co, Ti-Ni, Ti-Zn), where nano-alloys used as catalyst. These Nano-alloys are prepared by Hydrazine reduction method. Catalytic properties of these nanomaterials were measured on Ammonium perchorate / Hydroxyterminatedpolybutadiene propellant by Thermogravimetery analysis and Differential thermal analysis. Both experimental results show enhance in the thermal decomposition of propellants in presence of nano-alloys. In this Differential thermal analysis method experiments had done in 3 heating rate���� 5���� =10,���� 15 degree on minute. Independent to model free; calculation of activation energy of high temperature decomposition step was done by using following Kissinger equation. Burning rate of propellants is also calculated.
{"title":"Ti-alloys: Potential nano-modifier for Rocket Propellants","authors":"P. Dave, P. N. Ram, S. Chaturvedi","doi":"10.7508/IJND.2016.02.009","DOIUrl":"https://doi.org/10.7508/IJND.2016.02.009","url":null,"abstract":"Composite solid propellants were prepared with and without nano-alloys (Ti-Co, Ti-Ni, Ti-Zn), where nano-alloys used as catalyst. These Nano-alloys are prepared by Hydrazine reduction method. Catalytic properties of these nanomaterials were measured on Ammonium perchorate / Hydroxyterminatedpolybutadiene propellant by Thermogravimetery analysis and Differential thermal analysis. Both experimental results show enhance in the thermal decomposition of propellants in presence of nano-alloys. In this Differential thermal analysis method experiments had done in 3 heating rate���� 5���� =10,���� 15 degree on minute. Independent to model free; calculation of activation energy of high temperature decomposition step was done by using following Kissinger equation. Burning rate of propellants is also calculated.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77561998","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 : 2016-05-01DOI: 10.7508/IJND.2016.02.006
Tahmasebi Soheila, M. Omid, Yari Mohammad
A BSTR AC T: In this study, Graphene Oxide- Gold nanoparticles (GO-AuNPs) nanocomposite as novel adsorbent was synthesized by direct reaction between GO and chloroauric acid for removal of amoxicillin from aqueous solution. Nanocomposite (GO-AuNPs) was characteristic by FT-IR spectroscopy. The changes of parameters such as contact time, pH of solution, initial amoxicillin concentration and temperature were measured and investigated by several adsorption experiments various factors affecting the uptake behavior. The adsorption kinetics well described by a pseudo-secondorder rate model.
{"title":"Kinetics adsorption of Amoxicillin from aqueous solution by Graphen Oxide- Gold nanoparticles (GO-AuNPs) nanocomposite as novel adsorbent","authors":"Tahmasebi Soheila, M. Omid, Yari Mohammad","doi":"10.7508/IJND.2016.02.006","DOIUrl":"https://doi.org/10.7508/IJND.2016.02.006","url":null,"abstract":"A BSTR AC T: In this study, Graphene Oxide- Gold nanoparticles (GO-AuNPs) nanocomposite as novel adsorbent was synthesized by direct reaction between GO and chloroauric acid for removal of amoxicillin from aqueous solution. Nanocomposite (GO-AuNPs) was characteristic by FT-IR spectroscopy. The changes of parameters such as contact time, pH of solution, initial amoxicillin concentration and temperature were measured and investigated by several adsorption experiments various factors affecting the uptake behavior. The adsorption kinetics well described by a pseudo-secondorder rate model.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79662216","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 : 2016-05-01DOI: 10.7508/IJND.2016.02.001
H. Ahmad, K. Rajagopal, A. Shah
A BS TR AC T: Silver nanoparticles (AgNPs) are amongst the most investigated materials in nanotechnology in view of their unique physio-chemical features and and applications in restorative science. Their progressive usage in different fields of science and some predominant restrictions with conventional methods for their synthesis have demanded analysts to discover green courses for their creation. Biological methods are the preferred to combat with the issues concerned with the nanoparticle synthesis. Within this decade, thousands of plants have been screened to analyze the final impact on characterization and morphology of AgNPs compared to general modes of their synthesis. Phytosynthetic method is an eco-friendly route that can lead to an advanced production of silver nanoparticles with controlled morphology. We herein reviewed the present aspects of phytosynthesis of AgNPs and their importance in modern science. Moreover, overviews of proposed mechanisms in this technology have also been included, which ultimately provide some insights of their safe use and demand for further research.
{"title":"The Green route of Silver nanotechnology: Phytosynthesis and applications","authors":"H. Ahmad, K. Rajagopal, A. Shah","doi":"10.7508/IJND.2016.02.001","DOIUrl":"https://doi.org/10.7508/IJND.2016.02.001","url":null,"abstract":"A BS TR AC T: Silver nanoparticles (AgNPs) are amongst the most investigated materials in nanotechnology in view of their unique physio-chemical features and and applications in restorative science. Their progressive usage in different fields of science and some predominant restrictions with conventional methods for their synthesis have demanded analysts to discover green courses for their creation. Biological methods are the preferred to combat with the issues concerned with the nanoparticle synthesis. Within this decade, thousands of plants have been screened to analyze the final impact on characterization and morphology of AgNPs compared to general modes of their synthesis. Phytosynthetic method is an eco-friendly route that can lead to an advanced production of silver nanoparticles with controlled morphology. We herein reviewed the present aspects of phytosynthesis of AgNPs and their importance in modern science. Moreover, overviews of proposed mechanisms in this technology have also been included, which ultimately provide some insights of their safe use and demand for further research.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77353311","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 : 2016-05-01DOI: 10.7508/IJND.2016.02.010
M. Zeydi, N. Mahmoodi
A B S T R A C T : An efficient, simple and convenient route is described for the synthesis of biscoumarin (3,3'(arylmethylene)bis(4-hydroxy-2H-chromen-2-one)) by using recyclable catalyst TiO 2 @KSF. In this procedure, we synthesize a biscoumarin derivative via the three multi-component reactions (3MCRs) of two equivalent 4hydroxycoumarin with one equivalent of various aromatic aldehydes in the presence of 20 mg nano TiO 2 @KSF as homogeneous catalyst under solvent-free conditions at 100 °C for the convinced reaction times (8–15 min). e advantages of this protocol towards the synthesis of biscoumarin derivatives are: a) use of solvent-free conditions, b) inexpensive catalyst, c) using commercially available precursors, d) reusability of TiO 2 @KSF up to four cycles without much loss in reactivity, e) simple work-up, f) high yields of pure products, g) short reaction times. The structure of all biscoumarin derivatives were confirmed by M.p., TLC, FT-IR, 1 H NMR spectra and were compared with reliable references.
{"title":"Nano TiO2@KSF as a high-efficient catalyst for solvent-free synthesis of Biscoumarin derivatives","authors":"M. Zeydi, N. Mahmoodi","doi":"10.7508/IJND.2016.02.010","DOIUrl":"https://doi.org/10.7508/IJND.2016.02.010","url":null,"abstract":"A B S T R A C T : An efficient, simple and convenient route is described for the synthesis of biscoumarin (3,3'(arylmethylene)bis(4-hydroxy-2H-chromen-2-one)) by using recyclable catalyst TiO 2 @KSF. In this procedure, we synthesize a biscoumarin derivative via the three multi-component reactions (3MCRs) of two equivalent 4hydroxycoumarin with one equivalent of various aromatic aldehydes in the presence of 20 mg nano TiO 2 @KSF as homogeneous catalyst under solvent-free conditions at 100 °C for the convinced reaction times (8–15 min). e advantages of this protocol towards the synthesis of biscoumarin derivatives are: a) use of solvent-free conditions, b) inexpensive catalyst, c) using commercially available precursors, d) reusability of TiO 2 @KSF up to four cycles without much loss in reactivity, e) simple work-up, f) high yields of pure products, g) short reaction times. The structure of all biscoumarin derivatives were confirmed by M.p., TLC, FT-IR, 1 H NMR spectra and were compared with reliable references.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81655942","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 : 2016-05-01DOI: 10.7508/IJND.2016.02.007
A. Tadjarodi, M. Imani
In this work, the synthesis of porous structure of cadmium oxide with multilayered sheet-like morphology in nano-meter size using adipic acid as soft template by solvothermal/thermal decomposition process is reported. Chemical analyses exhibited that the formation of porous sheet-like structure is originated from bidentate coordination mode of adipate units to Cd-center. It was found that the change of reaction conditions can vary final morphology of product due to the different coordination modes of adipate units. The structural and morphological characterizations of product were discussed in detail. Brunauer-Emmett-Teller (BET) analysis indicated a specific surface area of 52.08 m 2 g - 1 with pore size distribution centered at 11.7 nm for prepared CdO sheet-like nanostructure. The capability of the as prepared product for adsorption of dye pollutants from aqueous solution was also studied. The results showed a maximum adsorption capacity (q max ) of 500 mg g -1 for adsorption of Congo Red (CR) dye in water revealing a superior ability of this product for adsorption of dye pollutants.
本文以己二酸为软模板，采用溶剂热/热分解法制备了具有多层片状结构的纳米级氧化镉多孔结构。化学分析表明，多孔片状结构的形成源于邻体单元与cd中心的双齿配位模式。研究发现，由于己二酸单元的配位模式不同，反应条件的改变会改变产物的最终形态。详细讨论了产物的结构和形态表征。BET分析表明，制备的CdO片状纳米结构比表面积为52.08 m2 g - 1，孔径分布以11.7 nm为中心。研究了制备的产物对水溶液中染料污染物的吸附性能。结果表明，该产品对刚果红(CR)染料在水中的最大吸附量(q max)为500 mg g -1，表明该产品对染料污染物具有较好的吸附能力。
{"title":"Synthesis of porous CdO sheet-like nanostructure based on soft template model and application in dye pollutants adsorption","authors":"A. Tadjarodi, M. Imani","doi":"10.7508/IJND.2016.02.007","DOIUrl":"https://doi.org/10.7508/IJND.2016.02.007","url":null,"abstract":"In this work, the synthesis of porous structure of cadmium oxide with multilayered sheet-like morphology in nano-meter size using adipic acid as soft template by solvothermal/thermal decomposition process is reported. Chemical analyses exhibited that the formation of porous sheet-like structure is originated from bidentate coordination mode of adipate units to Cd-center. It was found that the change of reaction conditions can vary final morphology of product due to the different coordination modes of adipate units. The structural and morphological characterizations of product were discussed in detail. Brunauer-Emmett-Teller (BET) analysis indicated a specific surface area of 52.08 m 2 g - 1 with pore size distribution centered at 11.7 nm for prepared CdO sheet-like nanostructure. The capability of the as prepared product for adsorption of dye pollutants from aqueous solution was also studied. The results showed a maximum adsorption capacity (q max ) of 500 mg g -1 for adsorption of Congo Red (CR) dye in water revealing a superior ability of this product for adsorption of dye pollutants.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88713436","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 : 2016-05-01DOI: 10.7508/IJND.2016.02.003
Pourahmad Afshin
Molecular sieves MCM-41 were synthesized from rice husk ash (RHA) as alternative sources of silica. e material was synthesized by a room temperature method from a gel with the molar composition SiO 2 : 1.6 EA: 0.215HDTMABr: 325H 2 O with pH correction. The cetyltrimethylammonium bromide (CTMABr) was used as a structure template. Nanocomposite containing 5.0 and 10.0 wt.% of Cu was synthesized under solid state reaction. e calcinations of samples were done at two different temperatures, 400 and 600 ° C. The morphology and the physicochemical properties of the prepared samples were investigated by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). TEM images indicated that nanoparticles size of CuO is ~ 3 nm.
{"title":"GREEN CHEMISTRY APPROACH FOR THE SYNTHESIS OF CUO NANOSTRUCTURE","authors":"Pourahmad Afshin","doi":"10.7508/IJND.2016.02.003","DOIUrl":"https://doi.org/10.7508/IJND.2016.02.003","url":null,"abstract":"Molecular sieves MCM-41 were synthesized from rice husk ash (RHA) as alternative sources of silica. e material was synthesized by a room temperature method from a gel with the molar composition SiO 2 : 1.6 EA: 0.215HDTMABr: 325H 2 O with pH correction. The cetyltrimethylammonium bromide (CTMABr) was used as a structure template. Nanocomposite containing 5.0 and 10.0 wt.% of Cu was synthesized under solid state reaction. e calcinations of samples were done at two different temperatures, 400 and 600 ° C. The morphology and the physicochemical properties of the prepared samples were investigated by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). TEM images indicated that nanoparticles size of CuO is ~ 3 nm.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87589176","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 : 2016-05-01DOI: 10.7508/IJND.2016.02.005
K. Kirandeep, Komal Ratika
+0 was observed when an aqueous extract of wheat leaves augmented with silver nitrate (AgNO 3 ) was incubated for 2 hours at 100 o C. The formation of silver nanoparticles was con rmed by surface plasmon resonance as determined by UV-Vis spectra at 430 nm. Silver nanoparticles of size ranging from 5-14 nm of spherical shape were characterized using transmission electron microscopy (TEM). These nanoparticles were found to possess potential antibacterial activity against (Escherichia coli, Staphylococcus aureus, Klebsiella) using disc diffusion method and macro dilution (tube) broth method. This environmental friendly method provides a simple, easy, fast and cost effective method for nanoparticles synthesis and can be used in several areas of medicines and industries.
{"title":"COMPARATIVE ANALYSIS OF ANTIBACTERIAL ACTIVITY OF SILVER NANOPARTICLES SYNTHESIZED USING LEAF EXTRACT OF WHEAT VARIETIES","authors":"K. Kirandeep, Komal Ratika","doi":"10.7508/IJND.2016.02.005","DOIUrl":"https://doi.org/10.7508/IJND.2016.02.005","url":null,"abstract":"+0 was observed when an aqueous extract of wheat leaves augmented with silver nitrate (AgNO 3 ) was incubated for 2 hours at 100 o C. The formation of silver nanoparticles was con rmed by surface plasmon resonance as determined by UV-Vis spectra at 430 nm. Silver nanoparticles of size ranging from 5-14 nm of spherical shape were characterized using transmission electron microscopy (TEM). These nanoparticles were found to possess potential antibacterial activity against (Escherichia coli, Staphylococcus aureus, Klebsiella) using disc diffusion method and macro dilution (tube) broth method. This environmental friendly method provides a simple, easy, fast and cost effective method for nanoparticles synthesis and can be used in several areas of medicines and industries.","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83499987","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 : 2016-05-01DOI: 10.7508/IJND.2016.02.008
S. Aref
In this project, a nano catalyst (TiO 2 ) and ozone combined with each other and they were used for the removal of 4-nitrophenol (4NP) in industerial wastewater. The effect of some operational parameters such as initial pH (3-9), the concentration of pollutant (20-80 mg/L), and amount of TiO 2 were investigated. In O 3 /TiO 2 process, the anion radical formed before the production of hydroxyl radical. These results were different from the Ozonation process alone, in which high pH had a positive effect on the degradation of 4NP, because hydroxyl radicals was formed. In ozonation and O 3 /TiO 2 processes, about 89 and 97% of 4NP were degraded respectively, at optimum pH and 60 min of reaction. In catalytic ozonation the degradation rate of 4NP was higher at weak acidic pH conditions (pH=5). The removal of chemical oxygen demand (COD) was increased from 49% (only ozonation) to 74% (O 3 /TiO 2 ) at 90 min of reaction. The kinetic of degradation was pseudo-first-order and degradation and mineralization of 4NP were estimated by HPLC and COD tests, respectively. Ke ywords: Chemical Oxygen demand (COD); Degradation; Iindusterial wastewater; TiO 2 nano catalyst; 4-Nitrophenol (4NP)
{"title":"DEGRADATION OF 4-NITROPHENOL FROM INDUSTERIAL WASTEWATER BY NANO CATALYTIC OZONATION","authors":"S. Aref","doi":"10.7508/IJND.2016.02.008","DOIUrl":"https://doi.org/10.7508/IJND.2016.02.008","url":null,"abstract":"In this project, a nano catalyst (TiO 2 ) and ozone combined with each other and they were used for the removal of 4-nitrophenol (4NP) in industerial wastewater. The effect of some operational parameters such as initial pH (3-9), the concentration of pollutant (20-80 mg/L), and amount of TiO 2 were investigated. In O 3 /TiO 2 process, the anion radical formed before the production of hydroxyl radical. These results were different from the Ozonation process alone, in which high pH had a positive effect on the degradation of 4NP, because hydroxyl radicals was formed. In ozonation and O 3 /TiO 2 processes, about 89 and 97% of 4NP were degraded respectively, at optimum pH and 60 min of reaction. In catalytic ozonation the degradation rate of 4NP was higher at weak acidic pH conditions (pH=5). The removal of chemical oxygen demand (COD) was increased from 49% (only ozonation) to 74% (O 3 /TiO 2 ) at 90 min of reaction. The kinetic of degradation was pseudo-first-order and degradation and mineralization of 4NP were estimated by HPLC and COD tests, respectively. Ke ywords: Chemical Oxygen demand (COD); Degradation; Iindusterial wastewater; TiO 2 nano catalyst; 4-Nitrophenol (4NP)","PeriodicalId":14081,"journal":{"name":"international journal of nano dimension","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80631281","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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