Asian Journal of Green Chemistry最新文献

Hydrothermal and sol-gel low-temperature synthesis of tin, silver co-doped TiO2 nanoparticles with enhanced photocatalytic efficiency: artificial neural network modelling 水热和溶胶-凝胶低温合成具有增强光催化效率的锡、银共掺杂TiO2纳米粒子:人工神经网络建模

Asian Journal of Green Chemistry Pub Date : 2019-10-01 DOI: 10.33945/SAMI/AJGC.2019.4.2

R. Mohammadi, M. Isazadeh

{"title":"Hydrothermal and sol-gel low-temperature synthesis of tin, silver co-doped TiO2 nanoparticles with enhanced photocatalytic efficiency: artificial neural network modelling","authors":"R. Mohammadi, M. Isazadeh","doi":"10.33945/SAMI/AJGC.2019.4.2","DOIUrl":"https://doi.org/10.33945/SAMI/AJGC.2019.4.2","url":null,"abstract":"Pure anatase TiO2 nanoparticles with various Ag and Sn contents were synthesized by hydrothermal and sol-gel low-temperature methods. Structural and morphological characterizations of synthesized nanoparticles were performed by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and N2 adsorption/desorption isotherm and brunauer-emmett-teller (BET) techniques. The effect of synthesis procedure on the crystalline structure, crystal size, surface area, pore size distribution and photocatalytic activity of synthesized samples were studied. The photocatalytic activity was tested vs. degradation of methylene blue (MB) under black light radiation. Ag/Sn-TiO2 nanoparticles synthesized by hydrothermal method showed higher photoactivity during the degradation of MB under black light irradiation because of being enhanced in the specific surface area, total pore volume, and its reduction in the crystallite size. An artificial neural network (ANN) comprising four input variables (mol% of dopant ions, photocatalyst dosage, initial dye concentration, and pH of the solution), eight neurons and an output variable (degradation efficiency %) was optimized, tested and validated for MB degradation by Ag/Sn-TiO2 nanoparticles synthesized via hydrothermal method. The results showed that the predicted data from the designed ANN model are in good agreement with the experimental data with a correlation coefficient (R2) of 0.979. A 98.9% photodegradation efficiency of MB was achieved by utilizing 0.07 mol% Ag and 0.03 mol% Sn co-doped TiO2 at pH = 12.","PeriodicalId":321645,"journal":{"name":"Asian Journal of Green Chemistry","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123300440","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

Imidazole mediated synthesis of spirooxindoles in water using isatin as a privileged scaffold 咪唑介导的螺菌吲哚在水中的合成

Asian Journal of Green Chemistry Pub Date : 2019-10-01 DOI: 10.33945/SAMI/AJGC.2019.4.4

M. N. Khan, D. Parmar, H. Bhatt

引用次数: 4

Identification of lectins from the seeds of Bangladeshi plants Sesbania bispinosa and Senna occidentalis by hemagglutination assay 用血凝试验鉴定孟加拉植物双叶田葵和西番泻种子中的凝集素

Asian Journal of Green Chemistry Pub Date : 2019-10-01 DOI: 10.33945/SAMI/AJGC/2019.4.8

M. Sultana, Fazle Rabbi Shakil Ahmed, M. Alam

引用次数: 5

Lactoperoxidase inhibition by tautomeric propylthiouracils 互变异构体丙硫脲嘧啶对乳过氧化物酶的抑制作用

Asian Journal of Green Chemistry Pub Date : 2019-07-20 DOI: 10.22034/AJGC/2020.1.1

M. Soleimani, M. Mirzaei, M. Mofid, G. Khodarahmi, S. Rahimpour

引用次数: 20

TiO2-graphene/chitosan nanocomposite: preparation and its application for removal of anionic dyes 二氧化钛-石墨烯/壳聚糖纳米复合材料的制备及其在去除阴离子染料中的应用

Asian Journal of Green Chemistry Pub Date : 2019-03-03 DOI: 10.22034/AJGC.2019.158788.1117

R. Mohammadi, Nasrin Sabourmoghaddam

{"title":"TiO2-graphene/chitosan nanocomposite: preparation and its application for removal of anionic dyes","authors":"R. Mohammadi, Nasrin Sabourmoghaddam","doi":"10.22034/AJGC.2019.158788.1117","DOIUrl":"https://doi.org/10.22034/AJGC.2019.158788.1117","url":null,"abstract":"In this work, TiO2-graphene/chitosan nanocomposite with high photocatalytic activity was successfully synthesized and characterized by various analyses such as XRD, TEM, SEM, EDX and DRS. The photocatalytic activity was tested vs. removal of methyl red as ananionic dye under black light radiation. Based on the results, TiO2-graphene/chitosan nanocomposite could effectively remove methyl red, and demonstrate an excellent photocatalytic enhancement over TiO2 and TiO2-graphene samples. The degradation reaction fit well to a Langmuir-Hinshelwood kinetic model implying that the reaction rate is depended on the initial adsorption step. An artificial neural network (ANN) comprising four input variables (TiO2-graphene/chitosan dosage, initial dye concentration, reaction time and temperature of the solution), eight neurons and an output variable (Removal efficiency %) was optimized, tested and validated for methyl red degradation by the prepared TiO2-graphene/chitosan nanocomposite. The results showed that the predicted data from the designed ANN model are in good agreement with the experimental data with a correlation coefficient (R2) of 0.9831. Based on the results, reaction time is the most influential variable and the temperature of solution is the less influential parameter in the removal efficiency of methyl red.","PeriodicalId":321645,"journal":{"name":"Asian Journal of Green Chemistry","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130874714","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: 4

Application of modified sawdust for solid phase extraction, preconcentration and determination of trace lead in water samples 改性木屑在固相萃取、预富集及测定水样中痕量铅中的应用

Asian Journal of Green Chemistry Pub Date : 2019-03-02 DOI: 10.22034/AJGC.2019.156540.1116

Rashin Andayesh, S. Elhami

{"title":"Application of modified sawdust for solid phase extraction, preconcentration and determination of trace lead in water samples","authors":"Rashin Andayesh, S. Elhami","doi":"10.22034/AJGC.2019.156540.1116","DOIUrl":"https://doi.org/10.22034/AJGC.2019.156540.1116","url":null,"abstract":"A new sorbent was provided and exerted for separation and preconcentration of Pb (II) before the determination of lead ions by flame atomic absorption spectrometry. The normative studies on extraction, separation and preconcetration of Pb (II) were represented in the present work. This novel method was based on new sorbent by adding diethylenetriamine to sawdust and increasing incidence exterior. The effect of different parameters were studied; such as pH, ligand concentration and sample volume, type and volume of eluent and ligand effect. The optimum pH and preconcentration factor and limit of detection for Pb (II) were 4, 100 and 0.48 µg/L, respectively. Furthermore, in this approach calibration curve was linear in the range of 0.05-100 mg mL-1 with R2 = 0.995. The vertical and horizontal confines of calibration diagrams in 500 mL solution were calculated about 0-0.5 mg L-1 and 0-0.6. The results of applying the present method to determinate the separated lead ions in water samples were prosperous and harmonious. Precision of the method was investigated by comparing them with observations from previous similar researches.","PeriodicalId":321645,"journal":{"name":"Asian Journal of Green Chemistry","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115368458","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

Efficient and green synthesis of trisubstituted imidazoles by magnetically nanocatalyst and microwave assisted 磁性纳米催化剂与微波辅助高效绿色合成三取代咪唑

Asian Journal of Green Chemistry Pub Date : 2019-02-04 DOI: 10.22034/AJGC.2019.153703.1112

H. Mardani, M. Forouzani, R. Emami

引用次数: 8

Synthesis and anti-microbial activities of azomethine and aminomethyl phenol derivatives 亚甲胺和氨基甲基苯酚衍生物的合成及其抑菌活性

Asian Journal of Green Chemistry Pub Date : 2019-01-29 DOI: 10.22034/AJGC.2019.149472.1105

Sivakumar Matam, Prabakaran Kaliyan, Padmavathy Sethuramasamy, Seenivasa Perumal Muthu

引用次数: 0

Bioactive principle loaded gold nanoparticles as potent anti-melanoma agent: green synthesis, characterization, and in vitro bioefficacy 生物活性原理负载金纳米颗粒作为有效的抗黑色素瘤剂:绿色合成，表征和体外生物功效

Asian Journal of Green Chemistry Pub Date : 2019-01-22 DOI: 10.33945/SAMI/AJGC.2019.4.6

Saurabh Yadav, Mukti Sharma, N. Ganesh, S. Srivastava, M. Srivastava

{"title":"Bioactive principle loaded gold nanoparticles as potent anti-melanoma agent: green synthesis, characterization, and in vitro bioefficacy","authors":"Saurabh Yadav, Mukti Sharma, N. Ganesh, S. Srivastava, M. Srivastava","doi":"10.33945/SAMI/AJGC.2019.4.6","DOIUrl":"https://doi.org/10.33945/SAMI/AJGC.2019.4.6","url":null,"abstract":"The present communication warrants the presence of significant anti-melanoma bioefficacy in the native bark ethanolic extract (65.15%) of the plant Madhuca longifolia. A family of seven flavonoids has been ascertained in the bark ethanolic extract of the target plant using HPLC-ESI-QTOF-MS analysis as bioactive constituents. Statistically, significant (p<0.05)enhancement in the anti-melanoma bioefficacy (85.15%) has been successfully attempted, reaching near to the level of reference (Cyclophosphamide drug) using bioactive principle (flavonoid) loaded gold nanoparticles (F@AuNp). In vitro anti-melanoma bioefficacy has been measured against two melanoma cell lines (B16F10 and A375) using MTT and SRB bioassays. Noticeably, the native bark extract and F@AuNp did not show any toxicity towards normal lymphocyte cells, highlighting their safe and non-toxic nature. The pathway of observed anti-melanoma efficacy of (F@AuNp) has been discussed based on our experimental findings on percent inhibition in mice and human melanoma cell lines, production of intracellular reactive oxygen species, the release of nitric oxide, and increase caspase-3 activities. The native bark extract of the plant M. longifolia and its bioactive principle loaded gold nanoparticles possess bright prospects for the development of complimentary herbal nanomedicine for scaling-up the anti-melanoma bioefficacy.","PeriodicalId":321645,"journal":{"name":"Asian Journal of Green Chemistry","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128918418","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

Solvent-free synthesis for imidazole-1-yl-acetic acid hydrochloride: an intermediate for zoledronic acid 唑来膦酸中间体咪唑-1-基乙酸盐酸盐的无溶剂合成

Asian Journal of Green Chemistry Pub Date : 2019-01-19 DOI: 10.22034/ajgc.2018.152036.1108

Chandrakant Belwal, Jaimin Patel

引用次数: 3