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| 1 | Effects of TiO_2 nanoparticles on the aquatic plant Spirodela polyrrhiza: Evaluation of growth parameters, pigment contents and antioxidant enzyme activities显示文摘Plants are essential components of all ecosystems and play a critical role in environmental fate of nanoparticles. However, the toxicological impacts of nanoparticles on plants are not well documented. Titanium dioxide nanoparticles(TiO_2-NPs) are produced worldwide in large quantities for a wide range of purposes. In the present study, the uptake of TiO_2-NPs by the aquatic plant Spirodela polyrrhiza and the consequent effects on the plant were evaluated.Initially, structural and morphological characteristics of the used TiO_2-NPs were determined using XRD, SEM, TEM and BET techniques. As a result, an anatase structure with the average crystalline size of 8 nm was confirmed for the synthesized TiO_2-NPs. Subsequently, entrance of TiO_2-NPSto plant roots was verified by fluorescence microscopic images. Activity of a number of antioxidant enzymes, as well as, changes in growth parameters and photosynthetic pigment contents as physiological indices were assessed to investigate the effects of TiO_2-NPs on S. polyrrhiza. The increasing concentration of TiO_2-NPs led to the significant decrease in all of the growth parameters and changes in antioxidant enzyme activities. The activity of superoxide dismutase enhanced significantly by the increasing concentration of TiO_2-NPs. Enhancement of superoxide dismutase activity could be explained as promoting antioxidant system to scavenging the reactive oxygen species. In contrast, the activity of peroxidase was notably decreased in the treated plants. Reduced peroxidase activity could be attributed to either direct effect of these particles on the molecular structure of the enzyme or plant defense system damage due to reactive oxygen species. | Ali Movafeghi Alireza Khataee Mahboubeh Abedi Roshanak Tarrahi Mohammadreza Dadpour Fatemeh Vafaei | 2018 | Journal of Environmental Sciences2018，30，2： | 6 |
| 2 | Preparation of a novel γ-FeOOH-GAC nano composite for decolorization of textile wastewater by photo Fenton-like process in a continuous reactor显示文摘 | Mohsen Sheydaei Soheil Aber Alireza Khataee | 2014 | A, Chemical2014，，： | 2 |
| 3 | Separation of methane from different gas mixtures using modified silicon carbide nanosheet: Micro and macro scale numerical studies显示文摘This research discusses the separation of methane gas from three different gas mixtures,CH4/H2 S,CH4/N2 and CH4/CO2,using a modified silicon carbide nanosheet(Si CNS)membrane using both molecular dynamics(MD)and computational fluid dynamics(CFD)methods.The research examines the effects of different structures of the Si CNSs on the separation of these gas mixtures.Various parameters including the potential of the mean force,separation factor,permeation rate,selectivity and diffusivity are discussed in detail.Our MD simulations showed that the separation of CH4/H2 S,and CH4/CO2 mixtures was successful,while simulation demonstrated a poor result for the CH4/N2 mixture.The effect of temperature on the diffusivity of gas is also discussed,and a correlation is introduced for diffusivity as a function of temperature.The evaluated value for diffusivity is then used in the CFD method to investigate the permeation rate of gas mixtures. | Golchehreh Bayat Roozbeh Saghatchi Jafar Azamat Alireza Khataee | 2020 | Chinese Journal of Chemical Engineering2020，28，5： | 2 |
| 4 | 前驱体改性法制备薄层多孔富氨基的石墨相氮化碳用于光催化降解RhB和光催化制氢显示文摘半导体光催化是一种利用半导体将太阳能转换为高能化学能的绿色技术,在可再生清洁能源生产和污染物修复领域有着巨大的应用前景.石墨相氮化碳(g-C_(3)N_(4))作为一种环境友好的非金属半导体,因其制备工艺简单、来源丰富、热稳定性和化学稳定性好、可见光吸收范围及特殊的电子性能而受到广泛关注.但一般常用氮源前驱体如二氰二胺、三聚氰胺等所制备的块状石墨相氮化碳存在团聚、比表面积小和光生载流子分离效率低等问题,严重抑制了其光催化活性.本文采用前驱体改性法制得具有高效光催化活性的石墨相氮化碳.利用氰基在酸性条件下易水解这一特性,通过调节不同种类和浓度的酸(硝酸、盐酸、磷酸等)改性二氰二胺,制得一系列新前驱体,通过焙烧制备石墨相氮化碳.采用X射线粉末衍射、X射线光电子能谱、傅立叶变换红外光谱、透射电子显微镜和场发射扫描电子显微镜等表征手段对前驱体及氮化碳的结构及微观形貌进行研究.结果表明,通过浓硝酸改性二氰二胺成功制得脒基脲硝酸盐,其煅烧后所得的HNO_(3)-CN(5H-CN)催化剂具有较好的薄层多孔结构,且面内三均三嗪环末端具有丰富的氨基官能团.TG-FTIR结果表明,5H-CN通过不同于传统氮化碳的热缩合过程,导致了其多孔富氨基的结构.光催化性能测试表明,5H-CN对光催化降解罗丹明B(Rh B)具有最佳的催化活性,其准一级速率常数达0.05316 min^(-1),是普通块状石墨相氮化碳(CN)的34倍.此外,5H-CN的光催化制氢性能也远远高于CN.通过紫外-可见漫反射光谱、莫特-肖特基曲线和瞬态光电流测试等方法研究催化剂的形貌结构对光催化活性的影响.结果表明,5H-CN催化剂具有较高的光催化活性主要归因于其薄层多孔结构提供了更大的比表面积(148.76 m^(2)g^(-1)),表面有更多的活性位点,同时有助于光生载流子的有效分离;其面内三均三嗪环的末端边缘丰富的氨基结构使得其能带结构发生变化,更负的导带位置使其光生电子的还原能力更强,从而有利于光催化反应的进行.其光催化机理归纳如下:在5H-CN催化剂光催化降解Rh B过程中,O_(2)·^(-)作为最主要的活性物种可与空穴(h+)同时氧化催化剂表面的Rh B分子,从而达到光催化降解Rh B的作用;在5H-CN催化剂光催化制氢过程中,铂(3wt%Pt)作为助催化剂可以负导带上的光生电子(e-)快速迁移,迁移的e-可以直接还原水中的氢质子生成氢气. | 黄婷 陈佳琪 张莉莉 Alireza Khataee 韩巧凤 刘孝恒 孙敬文 朱俊武 潘书刚 汪信 付永胜 | 2022 | Chinese Journal of Catalysis2022，43，2： | 2 |
| 5 | Sonocatalytic removal of an organic dye using TiO2/Montmorillonite nanocomposite 显示文摘 | Khataee A Sheydaei M Hassani A | 2015 | Ultrasonics Sonochemistry2015，22，： | 1 |
| 6 | Photocatalytic degradation of aze dye acid red 14 in water on ZnO as an alternative catalyst to TiO2显示文摘 | Daneshvar N Salari D Khataee A R | 2004 | J Phtochem Photobiol A2004，162，23： | 1 |
| 7 | Electrochemical generation of H202 using immobilized carbon nanotubes on graphite electrode fed with air: Investigation of operational parameters显示文摘 | A R Khataee M Safarpour M Zarei | 2011 | Journal of Electroanalytical Chemistry2011，659，1： | 1 |
| 8 | Development of a novel high flux and fouling-resistant thin film composite nanofiltration membrane by embedding reduced grapheme oxidefriO2 显示文摘 | M Safarpour V Vatanpour A Khataee | 2015 | Separation and Purification Technology2015，154，： | 1 |
| 9 | Photocatalytic degradation of organic dyes in the presence of nanostructured titanium dioxide:Influence of the chemical structure of dyes显示文摘 | Khataee A R Kasiri M B | 2010 | Journal of Molecular Catalysis A:Chemical2010，328，： | 1 |
| 10 | Photocatalytic degradation of aze dye acid red 14 in water on ZnO as an alternative catalyst to TiO2显示文摘 | Daneshvar N Salari D Khataee A R | 2004 | J Phtochem Photobiol A2004，162，23： | 1 |
| 11 | Photocatalytic degradation of aze dye acid red 14 in water on ZnO as an alternative catalyst to TiO2 显示文摘 | Daneshvar N Salari D Khataee A | 2004 | J Phtochem Photobiol A2004，162，23： | 1 |
| 12 | Photocatalytic degradation of or- ganic dyes in the presence of nanostructured titanium diox- ide: influence of the chemical structure of dyes显示文摘 | Khataee A R Kasiri M B | 2010 | Journal of Molecular Catalysis A: Chemical2010，328，12： | 1 |
| 13 | Photocatalytic degradation of three azo dyes using immobilized TiO2 nanoparticles on glass platesactivated by UV light irradiation:Influence of dye molecular structure显示文摘 | Khataee A R Pons M N Zahraa O | 2009 | Journal of Hazardous Materials2009，168，1： | 1 |
| 14 | Photocatalytic degradation of organic dyes in the presence of nanostruetured titanium dioxide: Influence of the chemical structure of dyes显示文摘 | Khataee A R Kasiri M B | 2010 | Journal of Molecular Catalysis A: Chemical2010，328，12： | 1 |
| 15 | Photoeatalysis of a dye solution using immobilized ZnO nanoparticles combined with photoelec- trochemical process 显示文摘 | KHATAEE A R ZAREI M | 2011 | Desalination2011，273，23： | 1 |
| 16 | Heteregeneous sono-Fen- ton process using pyrite nanorods prepared by non-thermal plas- ma for degradation of an anthraquinone dye显示文摘 | Khataee A Gholami P Vahid B | 2016 | Ultrasonics Sono- chemistry2016，32，： | 1 |
| 17 | Photocatalytic degradation of azo dye acid red 14 in water: investigation of the effect ofoperational parameters 显示文摘 | DANESHVAR N SALARI D KHATAEE A R | 2003 | Journal of Photochemistry & Photobiology A Chemistry2003，，1： | 1 |
| 18 | 显示文摘 | Daneshvar N Rasoulifard M H Khataee A R | 2007 | Journal of Hazardous Materials2007，143，： | 1 |
| 19 | Application of response surface metbodology in he optimization of photocatalytc removal of environ- mental pollutants using nanocatalysts显示文摘 | Khataee A R Kasiri M B Alidokht L | 2011 | Environmental Technology2011，32，15： | 1 |
| 20 | Application of response surface methodology for optimization of azo dye removal by oxalate catalyzed photoelectro-Fenton process using carbon nanotube-PTFE cathode显示文摘 | KHATAEE A R ZAREI M MORADKHANNEJHAD L | 2010 | Desalination2010，258，13： | 1 |
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