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1Catalytic evaluation of promoted CeO_2-ZrO_2 by transition, alkali, and alkaline-earth metal oxides for diesel soot oxidation显示文摘Series of mixed metal oxides were synthesized by gel-combustion method and their catalytic activities for soot oxidation were investigated. The catalysts were M-Ce-Zr(M = Mn, Cu, Fe, K, Ba, Sr), and xK-20Mn-Ce-Zr(x = 0, 5, 10, 20), they were characterized by XRD, SEM, TPR and BET surface area techniques. The results of soot temperature programmed oxidation(TPO) in an O2 oxidizing atmosphere indicate that K-Ce-Zr has the highest catalytic activity for soot oxidation under loose contact condition, due to enhancement of the soot and catalyst contacts. On the other hand, under a tight contact condition, Mn-Ce-Zr and Cu-Ce-Zr nano-composites have high activities for soot oxidation and lower the soot TPO peak temperatures by about 280 and 270℃, respectively, as compared to non-catalytic soot oxidation. Furthermore, the addition of up to 10 wt.% potassium oxides into Mn-Ce-Zr increases its catalytic activity and further reduces the soot TPO peak temperature by about 40℃ under loose contact condition.Ali Alinezhadchamazketi Abas Ali Khodadadi Yadollah Mortazavi Ahmad Nemati 2013Journal of Environmental Sciences2013,25,12:10
2粉末冶金自润滑Cu/MoS_2复合材料的摩擦行为(英文)显示文摘研究MoS_2含量对纯铜的显微组织、密度、硬度和耐磨性能的影响。采用纯铜粉和MoS_2粉末,通过机械球磨和热压法,制备含0~10%(质量分数)MoS_2颗粒的铜基复合材料。在干滑动摩擦条件下,采用销-盘式磨损实验装置,测试材料的耐磨性能,固定滑动速率为0.2 m/s。硬度测试结果显示,MoS_2含量为2.5%的复合材料的硬度达到峰值。当载荷一定时,Cu/2.5MoS_2复合材料具有最低的摩擦因数和磨损量。当载荷从1 N增加到4 N,不同含量增强相复合材料的摩擦因数均减小,同时,磨损量增大。磨损表面和磨屑的SEM照片显示,Cu/MoS_2复合材料的磨损机理由纯铜的粘着磨损为主转变为磨粒磨损和剥层磨损相结合的机制。Mohammad MOAZAMI-GOUDARZI Aram NEMATI 2018Transactions of Nonferrous Metals Society of China2018,28,5:8
3Nano-Fe_3O_4 encapsulated-silica particles bearing sulfonic acid groups as a magnetically separable catalyst for green and efficient synthesis of functionalized pyrimido[4,5-b]quinolines and indeno fused pyrido[2,3-d]pyrimidines in water显示文摘磁性的 nanoparticles 支持了硅石硫磺的酸为 pyrimido 的合成被用作有效催化剂[4,5-b ] 喹啉和 indeno 熔化了 pyrido [2,3-d ] 水里的嘧啶。需要的产品在优秀收益被获得。Fe3O4@SiO2SO3H 乐意地用一个外部磁铁被恢复并且没有反应的重要损失,能若干次被再使用。Firouzeh Nemati Raheleh Saeedirad 2013Chinese Chemical Letters2013,24,5:6
4Tunable and reconfigurable metasurfaces and metadevices显示文摘Arash Nemati Qian Wang Minghui Hong Jinghua Teng 2018Opto-Electronic Advances2018,1,5:6
5Selective methanation of carbon monoxide in hydrogen rich stream over Ni/CeO_2 nanocatalysts显示文摘In the present work, selective methanation of carbon monoxide in hydrogen rich stream was investigated over Ni/CeO2 nanocatalysts. The obtained results revealed that increasing in nickel loading decreased the BET surface area, pore volume and nickel dispersion. The 25% Ni/CeO2 with a NiO crystal size of 12 nm exhibited the highest activity in CO methanation reaction and reached to maximum CO conversion and CH4 selectivity at temperatures above 230 ℃. The catalytic results revealed that CO selective methanation well progressed at lower temperatures while CO2 methanation was completely suppressed until CO conversion reached to maximum value.Behzad Nematollahi Mehran Rezaei Ebrahim Nemati Lay 2015Journal of Rare Earths2015,33,6:6
6Ultra-high extinction-ratio light modulation by electrically tunable metasurface using dual epsilon-near-zero resonances显示文摘The lossy nature of indium tin oxide(ITO) at epsilon-near-zero(ENZ) wavelength is used to design an electrically tunable metasurface absorber. The metasurface unit cell is constructed of a circular resonator comprising two ITO discs and a high dielectric constant perovskite barium strontium titanate(BST) film. The ENZ wavelength in the accumulation and depletion layers of ITO discs is controlled by applying a single bias voltage. The coupling of magnetic dipole resonance with the ENZ wavelength inside the accumulation layer of ITO film causes total absorption of reflected light. The reflection amplitude can achieve ~84 d B or ~99.99% modulation depth in the operation wavelength of 820 nm at a bias voltage of-2.5 V. Moreover, the metasurface is insensitive to the polarization of the incident light due to the circular design of resonators and the symmetrical design of bias connections.Arash Nemati Qian Wang Norman Soo Seng Ang Weide Wang Minghui Hong Jinghua Teng 2021Opto-Electronic Advances2021,4,7:5
7Thermodynamic analysis of combined reforming process using Gibbs energy minimization method: In view of solid carbon formation显示文摘Thermodynamic analysis was applied to study combined partial oxidation and carbon dioxide reforming of methane in view of carbon formation. The equilibrium calculations employing the Gibbs energy minimization were performed upon wide ranges of pressure (1-25 atm), temperature (600-1300 K), carbon dioxide to methane ratio (0-2) and oxygen to methane ratio (0-1). The thermodynamic results were compared with the results obtained over a Ru supported catalyst. The results revealed that by increasing the reaction pressure methane conversion decreased. Also it was found that the atmospheric pressure is the preferable pressure for both dry reforming and partial oxidation of methane and increasing the temperature caused increases in both activity of carbon and conversion of methane. The results clearly showed that the addition of O 2 to the feed mixture could lead to a reduction of carbon deposition.Behzad Nematollahi Mehran Rezaei Ebrahim Nemati Lay Majid Khajenoori 2012Journal of Natural Gas Chemistry2012,21,6:4
8水平环形翅片管的自然对流参数研究(英文)显示文摘对环形翅片管内的自然对流换热进行了数值研究。研究了翅片间距、温差、管径对流动路径和局部传热的影响。结果表明,对于不同的几何形状,PathLines 基本上是圆形的。此外,还明确了翅片周边、翅片侧和裸管对传热的贡献。翅片周边单位面积的传热可以是其他零件的数倍。此外,在较大的翅片间距中,来自裸管的热传递比散热片更重要。H. NEMATI M. MORADAGHAY 2019Journal of Central South University2019,26,8:4
9磺酸基修饰的纳米Fe_3O_4包覆二氧化硅颗粒作为可磁分离催化剂高效催化芳香醛与1,3-环二酮的Knoevenagel缩合反应和Michael加成反应(英文)显示文摘Sulfonic acid-functionalized silica-coated nano-Fe3O4 particles(Fe3O4@SiO2-SO3H) have been prepared as a novel heterogeneous acid using a facile process.The material was subsequently identified as an efficient catalyst for the synthesis of a variety of tetraketone derivatives via the Knoevenagel condensation and Michael addition reactions of aromatic aldehydes to dimedone,1,3-indanedione,and 1,3-dimethyl barbituric acid.The catalyst could be readily recovered using a simple external magnet and reused several times without any significant loss in activity.The current catalytic process is both sustainable and economical because it operates under aqueous conditions,the catalyst can be recovered and reused,and the reactions themselves require only a short time and provide the products in high yield.Firouzeh NEMATI Majid M.HERAVI Raheleh SAEEDI RAD 2012催化学报2012,33,11:4
10大豆提取物抗戊四唑所致卵巢切除大鼠痉挛的作用(英文)显示文摘目的:研究大豆提取物抗戊四唑所致卵巢切除大鼠痉挛的作用。方法:雌性Wistar大鼠随机分为4组(n=15),分别为假手术组、卵巢切除组、低剂量大豆提取物组和高剂量大豆提取物组。假手术组大鼠行假手术,其余3组大鼠行卵巢切除术。每组大鼠再随机分为2个亚组,其中一个亚组(n=7)每日予低剂量戊四唑(40mg/kg)腹腔内注射,连续14d;另一亚组(n=8)予一次高剂量戊四唑(90mg/kg)腹腔内注射。在戊四唑注射前30min,低剂量大豆提取物(20mg/kg)及高剂量大豆提取物(60mg/kg)组分别腹腔内注射大豆提取物,假手术组及卵巢切除组注射生理盐水。上述步骤完成后,将大鼠置于树脂玻璃箱中观察60min。结果:重复低剂量注射戊四唑14d,卵巢切除组大鼠的痉挛评分在第3、5、8、10、11、12及13天低于假手术组(P<0.05或P<0.01),而低剂量大豆提取物组和高剂量大豆提取物组大鼠的痉挛评分高于卵巢切除组(P<0.05或P<0.01)。一次性高剂量注射戊四唑后,与假手术组相比,卵巢切除组大鼠阵发性强直性抽搐潜伏期延长,而最小阵发性痉挛潜伏期无明显变化;与卵巢切除组相比,低剂量及高剂量的大豆提取物显著缩短了大鼠阵发性强直性抽搐及最小阵发性痉挛的潜伏期(P<0.01)。结论:雌激素能够影响戊四唑所致大鼠痉挛的严重程度,而大豆中所含的植物雌激素也具有类似作用,这种作用还有待更多的研究予以证实。Ali Reza Ebrahimzadeh Bideskan Mahmoud Hosseini Toktam Mohammadpour Reza Karami Mehdi Khodamoradi Habibollah Nemati Karimooy Hassan Alavi 2011中西医结合学报2011,9,6:4
11An accurate empirical correlation for predicting natural gas viscosity显示文摘Natural gas viscosity is an important parameter in many gas and petroleum engineering calculations.This study presents a new empirical model for quickly calculating the natural gas viscosity.The model was derived from 4089 experimental viscosity data with varieties ranging from 0.01 to 21,and 1 to 3 of pseudo reduced pressure and temperature,respectively.The accuracy of this new empirical correlation has been compared with commonly used empirical models,including Lee et al.,Heidaryan et al.,Carr et al.,and Adel Elsharkawy correlations.The comparison indicates that this new empirical model can predict viscosity of natural gas with average absolute relative deviation percentage AARD (%) of 2.173.Ehsan Sanjari Ebrahim Nemati Lay Mohammad Peymani 2011Journal of Natural Gas Chemistry2011,20,6:4
12Chiral electron deficient ruthenium helical coordination polymer as a catalyst for the epoxidation of substituted styrenes显示文摘空气和潮湿马厩钌(III ) 甲酸盐建筑群[Ru (HCO 2)Cl2] n 在代替的苯乙烯的 epoxidation 被综合了并且检验。这建筑群的 X 光检查结晶的数据被决定并且证明甲酸盐 ligand 以一种 22 方式协调到钌中心(syn, syn ) 。它的不对称的单位包含和甲酸盐 ligand 和一个氯化物阴离子的一半的离子,它在金属之间被衔接集中的一 Ru (III ) ,形成 1-D 链协作聚合物。这个电子缺乏的螺旋状的协作聚合物在 para-fluorostyrene 的 epoxidation 被采用,在 92% 产量负担得起 epoxide 产品。这协作聚合物的自然 chirality 在不对称的 epoxidation 反应是适用的。Bahareh Tamaddoni Jahromi Ali Nemati Kharat Sara Zamanian 2015Chinese Chemical Letters2015,26,1:3
13A Green and Highly Efficient Protocol for Catalyst-free Kno- evenagel Condensation and Michael Addition of Aromatic Al- dehydes with 1,3-Cyclic Diketones in PEG-400显示文摘为从有在在 PEG-400 的房间温度的 dimedone 和 1,3-indanedione 的芳香的醛的 tetraketones 的合成的一条方便、高度有效、绿的途径被描述。是的 PEG-400 的使用反应媒介并且避免任何催化剂的使用使这个过程环境地良性。七新混合物被报导。Firouzeh, Nemati Hossein, Kiani 2011Chinese Journal of Chemistry2011,29,11:2
14过渡SST模型模拟椭圆环形翅片管换热器的传热仿真显示文摘本文对椭圆环形翅片管换热器的热流体特性进行了数值模拟研究。采用过渡SST模型对湍流进行了仿真模拟,研究了气流速度、水平/垂直方向翅片直径比以及翅片密度的影响。仿真结果表明,椭圆环形翅片具有优越的性能。在具有相同传热性能的情况下,环形椭圆翅片的压降仅为圆环形翅片的一半。竖直椭圆环形翅片可能含有比圆环形翅片具有更优的热传导性能。利用相关性系数估算环形翅片的Nu数和压降,相关性系数和模拟结果在压降和传热系数上的最大偏差分别为5.6%和3.2%。为从第二定律的角度进一步阐述椭圆环形翅片的优越性,对归一化熵产生进行了研究。在所有情况下,圆环形翅片的熵产生率均高于椭圆环形翅片的。H NEMATI A R RAHIMZADEH WANG Chi-chuan 2020Journal of Central South University2020,27,8:2
15A series of 1,8-dioxooctahydroxanthenes are prepared using trichloroisocyanuric acid显示文摘一系列芳香的醛作为催化剂用 trichloroisocyanuric 酸(TCCA ) 被上交到 3,3,6,6-tetramethyl-9-aryl-1,8-dioxooctahydroxanthene 衍生物。Mohammad A.Bigdeli Firouzeh Nemati Gholam Hossein Mahdavinia Hamideh Doostmohammadi 2009Chinese Chemical Letters2009,20,11:2
16Synthesis and spectral properties of Nd-doped glass-ceramics in SiO_2-CaO-MgO system prepared by sol-gel method显示文摘SiO2-CaO-MgO glass and glass-ceramic powder doped with Nd3+ were synthesized with sol-gel method.Tetraethylorthosilicate (TEOS),Ca(NO3)2·4H2O,Mg(NO3)2·6H2O,Nd(NO3)3·6H2O,ethanol,distilled water,and HNO3 were used as starting materials.The synthesized powder's properties were examined with simultaneous thermal analysis (STA),X-ray diffraction (XRD),photoluminescence (PL) and scanning electron microscopy (SEM) analysis.The STA curves showed that the softening point and crystallization temperatures were shifted to higher temperatures with increasing dopant content.Regarding XRD patterns of glass samples,Nd was found to act as an intermediate oxide in glass matrix.The XRD patterns of glass-ceramic samples indicated that bredigite and akermanite crystallized in the glass matrix after heat treating at 900 oC.The fluorescence spectra showed that glass-ceramics emitted much stronger irradiation than glasses with the same dopant content.The SEM images illustrated uniform and homogeneous distribution of applied oxides in glass and glass-ceramic compositions.Masoud Eslami Zohreh Hamnabard Ali Nemati 2013Journal of Rare Earths2013,31,6:2
17Zn(NO_3)_2·6H_2O/2,4,6-trichloro-1,3,5-triazine(TCT) a mild and selective system for nitration of phenols显示文摘Certain phenols and naphthols were nitrated regioselectively with Zn(NO_3)_2·6H_2O/TCT in acetonitrile as solvent at room temperature and short reaction time in good yields.The reaction condition was mild.TCT is a cheap and commercially available reagent.It performed as an acid catalyst in this transformation.Firouzeh Nemati Hossein Kiani 2010Chinese Chemical Letters2010,21,4:2
18Convective heat transfer from two rotating circular cylinders in tandem arrangement by using lattice Boltzmann method显示文摘The numerical investigation of the two-dimensional laminar flow past two ro- tating circular cylinders in the tandem arrangement is conducted by the lattice Boltzmann method. The numerical strategy is used for dealing with curved and moving boundaries of the second-order accuracy for velocity and temperature fields. The effects of various rotational speed ratios and gap spacing are studied with the Reynolds number of 100 and the Prandtl number of 0.71. A varied range of rotational speed ratios are investigated for four different gap spacing, i.e., 3.0, 1.5, 0.7, and 0.2. The results show that, for the first cylinder, the lift and drag coefficients for large gap spacing are similar to those for a single cylinder; for the second cylinder, the lift coefficient descends with the increase in the angular velocity for all gap spacing, while the drag coefficient ascends except for the gap spacing of 3.0. The results of the averaged periodic Nusselt number on the surface of the cylinders show that, for small distances between the cylinders and low angular velocities, conduction is a dominant mechanism of heat transfer, but for large distances and high angular velocities, convection is the main mechanism of heat transfer.H. NEMATI M. FARHADI K. SEDIGHI M. M. PIROUZ N. N. ABATARI 2012Applied Mathematics and Mechanics(English Edition)2012,33,4:2
19Speciation of heavy metals by modified BCR sequential extraction procedure in different depths of sediments from Sungai Buloh, Selangor, Malaysia显示文摘Keivan Nemati Nor Kartini Abu Bakar Mhd. Radzi Abas Elham Sobhanzadeh 2011Journal of Hazardous Materials2011,,1:2
20铯改性的沸石Y上醇类和胺类的氰乙基化反应(英文)显示文摘Zeolite Y modified by cesium and magnesium ions was prepared by ion-exchange and impregnation methods, and its activity in the cyanoethylation of aliphatic and aromatic alcohols and amines was investigated. During the preparation of some samples, the transformation of zeolite Y into a pollu-cite-type phase occurred. This phase exhibited good activity in the cyanoethylation of aliphatic alcohols. The prepared solids modified by the impregnation method were more active than the ion-exchanged solids. The activities of the catalysts, in contrast to other basic solids, were scarcely affected by the presence of air or moisture. A correlation between catalyst basicity and catalytic activity is discussed. The catalysts were characterized by X-ray diffraction, volumetric nitrogen adsorption surface area measurement, and CO2 temperature-programmed desorption. Scanning electron microscopy revealed that the particles of the modified nanocatalysts were < 40 nm. The reaction of acrylonitrile with linear alcohols in the presence of the catalysts was accelerated by microwave irradiation.Sara Zamanian Ali Nemati Kharat 2014催化学报2014,35,2:2
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