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In Situ Formed Ruthenium(0) Nanoparticles Supported on TiO2 Catalyzed Hydrogen Generation from Aqueous Ammonia-Borane Solution at Room Temperature Under Air 二氧化钛负载的原位生成钌纳米颗粒催化室温下氨硼溶液制氢
Pub Date : 2016-04-02 DOI: 10.1080/15533174.2014.988808
Nihayet Konuş, Y. Karataş, M. Gulcan
Herein, the authors report that TiO2 supported ruthenium nanoparticles (Ru(0)/TiO2) during hydrolysis starting with RuCl3/TiO2 precatalyst act as highly active, long-lived, and reusable nanocatalyst in the hydrogen generation from the hydrolysis of ammonia-borane (NH3BH3) at room temperature. The resulting Ru(0)/TiO2 catalyze hydrogen generation from the hydrolysis of ammonia-borane with an initial turnover frequency value of 200 min−1 at 25 ± 0.1°C. More importantly, Ru(0)/TiO2 are stable enough to be isolated and bottled as solid material, which can be reused as active catalyst under the identical conditions of the first run.
在此,作者报告了TiO2负载的钌纳米颗粒(Ru(0)/TiO2)在RuCl3/TiO2预催化剂开始的水解过程中,在室温下氨硼烷(NH3BH3)水解制氢过程中,作为高活性、长寿命和可重复使用的纳米催化剂。得到的Ru(0)/TiO2在25±0.1℃条件下催化氨硼烷水解制氢,初始转换频率为200 min−1。更重要的是,Ru(0)/TiO2足够稳定,可以作为固体材料分离和装瓶,可以在第一次运行的相同条件下作为活性催化剂重复使用。
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引用次数: 22
Optical and Thermal Properties of Polycarbonate–TiO2 Nanocomposite Film 聚碳酸酯- tio2纳米复合薄膜的光学和热性能
Pub Date : 2016-04-02 DOI: 10.1080/15533174.2014.988821
B. Jaleh, N. Shahbazi, A. Jabbari
Properties of polycarbonate and polycarbonate–TiO2 nanocomposite films were studied by X-ray diffraction analysis (XRD), FTIR spectroscopy, UV-Vis, and thermogravimetric analysis (TGA). The optical band gap values were found to reduce from 4.3 to 3.5 eV with increase in TiO2 content of nanocomposites. The influence of TiO2 nanoparticles in the polymer thermal degradation was determined by the Broido method and calculating the activation energy. The activation energy is higher for all nanocomposite compare with PC and it means higher thermal stability of nanocomposite. In addition TGA carves showed that nanocomposite films have higher resistance to thermal degradation compared to PC.
采用x射线衍射分析(XRD)、红外光谱(FTIR)、紫外可见光谱(UV-Vis)和热重分析(TGA)研究了聚碳酸酯和聚碳酸酯- tio2纳米复合薄膜的性能。随着TiO2含量的增加,纳米复合材料的光学带隙值从4.3 eV降低到3.5 eV。采用Broido法测定TiO2纳米颗粒对聚合物热降解的影响,并计算活化能。与PC相比,所有纳米复合材料的活化能都更高,这意味着纳米复合材料具有更高的热稳定性。此外,热重分析表明,纳米复合材料薄膜比PC具有更高的热降解性能。
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引用次数: 15
Interpenetrating 3D Framework Based on Inorganic Lanthanide Sulfate Rod Secondary Building Unit Involving In Situ Cleavage of a Sulfide–Sulfide Bond 基于无机镧系硫酸盐棒二次构建单元的互穿三维框架,涉及硫化物-硫化物键的原位解理
Pub Date : 2016-04-02 DOI: 10.1080/15533174.2014.988816
Meili Zhang
One novel two-fold interpenetrating 3D coordination polymer [Dy(L)(SO4)(H2O)] (1) (H2L = 6-hydroxypyridine-3-carboxylic acid) has been synthesized and characterized by elemental analyses and single-crystal X-ray diffraction, respectively. Interestingly, L and sulfate anions came from the in situ cleavage of a sulfide–sulfide bond of the flexible 6,6′-dithiodinicotinic acid in the hydrothermal reactions. In the structure of 1, the L ligands connect the (–Dy–SO4–)∞ inorganic rod secondary building units to form a 3D (3,5)-connected (42.65.83)(42.6) net, interlocking the 3D network leads to a twofold parallel interpenetration network. In addition, thermal stability of 1 was also investigated.
合成了一种新型二元互穿三维配位聚合物[Dy(L)(SO4)(H2O)] (1) (H2L = 6-羟基吡啶-3-羧酸),并用元素分析和单晶x射线衍射对其进行了表征。有趣的是,L和硫酸盐阴离子来自于水热反应中柔性6,6 ' -二硫代碘烟酸的硫化物-硫化物键的原位裂解。在结构1中,L配体连接(- dy - so4 -)∞无机棒二次建筑单元,形成三维(3,5)连接(42.65.83)(42.6)网,三维网络互锁,形成双重平行互穿网络。此外,还对1的热稳定性进行了研究。
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引用次数: 0
Adsorption Technology and Mechanism of Cu and CN− From Cyanide Waste Water on Modified Peanut Shell 改性花生壳对氰化废水中Cu和CN−的吸附技术及机理
Pub Date : 2016-04-02 DOI: 10.1080/15533174.2014.988796
Ya-li Zhang, Jing Yang, Xian-jin Yu, Qinglong Wang, Wenqiang Huang
Modified peanut shell (MPS) was prepared from peanut hull by chemical activation with H3PO4 and carbonized, which was characterized by micrometrics ASAP-20, SEM, and EDS. Adsorption of Cu and CN− on MPS was investigated as a function of pH, adsorbent dosage, temperature and time. The Langmuir and Freundlich models were used to simulate the adsorption isotherms of Cu at different temperature. The thermodynamic date were calculated, the results suggest that adsorption process of Cu on MPS was spontaneous and endothermic. Pseudo second-order kinetic model fits the experimental curves of Cu well and adsorption curve of CN− fits the pseudo first-order kinetic model.
以花生壳为原料,经H3PO4化学活化和炭化制备改性花生壳(MPS),并对改性花生壳进行了xrd、SEM和EDS表征。考察了pH、吸附剂用量、温度和时间对MPS吸附Cu和CN−的影响。采用Langmuir和Freundlich模型模拟了铜在不同温度下的吸附等温线。计算了热力学数据,结果表明铜在MPS上的吸附过程是自发的吸热过程。拟二级动力学模型与Cu的实验曲线拟合较好,CN−的吸附曲线与拟一级动力学模型拟合较好。
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引用次数: 6
Kinetic and Thermodynamic Studies of Zn2+ Adsorption Onto Superparamagnetic Poly (styrene-co-acrylic acid) Hydrogel 超顺磁性聚苯乙烯-共丙烯酸水凝胶吸附Zn2+的动力学和热力学研究
Pub Date : 2016-04-02 DOI: 10.1080/15533174.2014.988797
N. Sharma, A. Tiwari
The present research focuses on removal efficiency of superparamagnetic nano iron oxide loaded poly (styrene-co-acrylic acid) hydrogel for Zn2+ ions from aqueous solution by batch adsorption technique. The influence of pH, contact time, adsorbent dose, temperature, and metal ion concentration on the sensitivity of the removal process was inspected. Out of various kinetic models proposed, the pseudo second order seems to fit in the experimental data in the best way. Different thermodynamic parameters ΔG0, ΔH0, and ΔS0 have also been evaluated. The maximum percentage removal of Zn2+ ions (95%) was obtained at pH 7 in 120 min at room temperature (25°C).
研究了超顺磁性纳米氧化铁负载聚苯乙烯-共丙烯酸水凝胶对水溶液中Zn2+离子的间歇吸附去除效果。考察了pH、接触时间、吸附剂剂量、温度和金属离子浓度对去除过程灵敏度的影响。在提出的各种动力学模型中,伪二阶似乎是最适合实验数据的。不同的热力学参数ΔG0, ΔH0和ΔS0也进行了评估。在室温(25°C)下,pH为7时,在120 min内Zn2+离子的最大去除率为95%。
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引用次数: 0
A New Binuclear Cobalt(II) Complex Based on 1,3-Benzenedicarboxylic Acid and 2-(3-Pyridyl)benzimidazole 基于1,3-苯二甲酸和2-(3-吡啶基)苯并咪唑的新型双核钴(II)配合物
Pub Date : 2016-04-02 DOI: 10.1080/15533174.2014.988814
Quanzhen Zhang, Changkun Xia, Hongdian Lu, Rui-Xia Jiang, Xue-Ting Zhang, Xing Wang, Longzhong He
A binuclear cobalt(II) complex, [Co2(H2O)4(3-PBIM)4(1,3-BDC)2]·2H2O (1,3-H2BDC = 1,3-benzenedicarboxylic acid, 3-PBIM = 2-(3-pyridyl)benzimidazole), has been synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. The crystallographically independent cobalt atom is coordinated by four oxygen and two nitrogen donors in an octahedron geometry ([CoN2O4]). Two cobalt coordination units ([CoN2O4]) are linked together via four carboxyl oxygen atoms of two 1,3-BDC2− ligands, forming a dimetal unit ([CoN2O4]2). The extensive hydrogen bonding interactions connects the binuclear metal units into three-dimensional framework.
合成了一种双核钴(II)配合物[Co2(H2O)4(3-PBIM)4(1,3- bdc)2]·2H2O (1,3- h2bdc = 1,3-苯二甲酸,3-PBIM = 2-(3-吡啶基)苯并咪唑),并用元素分析、红外光谱和单晶x射线衍射对其进行了表征。晶体独立的钴原子由四个氧和两个氮供体配位成八面体([CoN2O4])。两个钴配位单元([CoN2O4])通过两个1,3- bdc2 -配体的四个羧基氧原子连接在一起,形成一个二金属单元([CoN2O4]2)。广泛的氢键相互作用将双核金属单元连接成三维框架。
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引用次数: 0
Effect of Particle Size on Dispersibility of Antimony Nanoparticles in Lubricating Oil 粒径对锑纳米颗粒在润滑油中分散性的影响
Pub Date : 2016-04-02 DOI: 10.1080/15533174.2014.988809
Jianlin Xu, Jia Wang, L. Niu, Jianbin Zhang, Chunyan Ju, Xueli Nan, Chong Feng
Antimony nanoparticles, whose surfaces were modified by alkylphenol polyoxyethylene ether, with various particle sizes were prepared by electrochemical method. The dispersibility of antimony nanoparticles in 32# engine oil was characterized by means of steady-state sedimentation experiment and spectrophotometric method when the resulting antimony nanoparticles with various particle sizes were dispersed in lubricating oil with 0.5% of mass fraction. The results show that the particle size of antimony nanoparticle has significant effect on its dispersibility in lubricating oil. When the mass fraction of antimony nanoparticles in lubricating oil is 0.5%, the steric hindrance effect of surface adsorption layer coating on particles surface increases with decreasing of particle size. Meanwhile, the aggregating probability decreases among nanoparticles under the action of the collision generated by Brownian motion. As a result, the sedimentation velocity of nanoparticles in lubricating oil becomes slower and the dispersion stability of antimony nanoparticles in lubricating oil becomes better.
以烷基酚聚氧乙烯醚为表面修饰剂,采用电化学方法制备了不同粒径的锑纳米粒子。采用稳态沉降实验和分光光度法,将制备的不同粒径的纳米锑分散在质量分数为0.5%的润滑油中,对纳米锑在32#发动机油中的分散性进行了表征。结果表明,纳米锑颗粒的粒径大小对其在润滑油中的分散性有显著影响。当润滑油中锑纳米颗粒的质量分数为0.5%时,随着粒径的减小,表面吸附层涂层对颗粒表面的位阻作用增大。同时,在布朗运动产生的碰撞作用下,纳米颗粒之间的聚集概率降低。结果表明,纳米粒子在润滑油中的沉降速度变慢,锑纳米粒子在润滑油中的分散稳定性变好。
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引用次数: 4
Controllable Preparation of La/TiO2 Using Hyperbranched Polyglycerols as Template and Their Photocatalytic Performance 以超支化聚甘油为模板可控制备La/TiO2及其光催化性能
Pub Date : 2016-04-02 DOI: 10.1080/15533174.2014.988224
Xiangfei Wu, Q. Cai, Weiei Gong, Jianting Tang, Chao Deng, Tiejun Cai, Q. Deng
Three hyperbranched polyglycerols with different molecular weight were synthesized by controlling the molar ratio of monomer and initiator. La-doped TiO2 catalysts were synthesized by those HPG as a templating agent for size control of La/TiO2. The photocatalytic elimination of methanol was used as model reactions to evaluate the photocatalytic activity of the catalysts. The size of La/TiO2 particles could be adjusted by changing the molecular weight of the HPG. With the molecular weight of HPG increase, the size of La/TiO2 particles decrease, the photocatalytic activity of the as-prepared catalysts enhance. This catalytic reaction follows the Langmuir-Hinshellwood mechanism.
通过控制单体与引发剂的摩尔比,合成了3种不同分子量的超支化聚甘油。以HPG为模板剂,合成了La掺杂TiO2催化剂,控制了La/TiO2的粒径。以光催化消除甲醇为模型反应,评价了催化剂的光催化活性。通过改变HPG的分子量,可以调节La/TiO2颗粒的大小。随着HPG分子量的增加,La/TiO2颗粒的尺寸减小,所制备的催化剂的光催化活性增强。这种催化反应遵循Langmuir-Hinshellwood机理。
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引用次数: 2
Synthesis, Structures, and Properties of NiII, CoII, CuII, MnII, and ZnII Coordination Polymers Based on 5-Aminoisophthalate and 4-Amino-3,5-bis(3-pyridyl)-1,2,4-triazole 基于5-氨基间苯二甲酸酯和4-氨基-3,5-双(3-吡啶基)-1,2,4-三唑的NiII、CoII、CuII、MnII和ZnII配位聚合物的合成、结构和性能
Pub Date : 2016-04-02 DOI: 10.1080/15533174.2014.988804
Xiaodong Hu, Yamei Guo
Self-assembly of 5-amino-isophthalic acid (H2aip) and 4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole (3-bpt) with Ni(NO3)2, Co(ClO4)2, Cu(NO3)2, Mn(OAc)2, and Zn(NO3)2, respectively, under similar reaction condition affords five new coordination polymers {[M(3-bpt)(aip)(H2O)2]·(H2O)2}n (M = Ni for 1, Co for 2, Cu for 3, Mn for 4, and Zn for 5). Single-crystal X-ray diffraction indicates that coordination polymers 1–5 show isostructural 1D double-chain structures, and the metal centers exhibit the same octahedral coordination environment. The carboxyl groups of ligand aip2− adopt the same bis-monodentate bridging mode in all structures. These low-dimensional coordination motifs in 1–5 are further extended to the resultant three-dimensional (3D) supramolecular networks via H-bonding interactions. Furthermore, FT-IR spectroscopy, elemental analyses and thermogravimetric analysis (TGA) for 1–5 have also been studied in this article.
在相似的反应条件下,5-氨基间苯二甲酸(H2aip)和4-氨基-3,5-双(3-吡啶基)-1,2,4-三唑(3-bpt)分别与Ni(NO3)2、Co(ClO4)2、Cu(NO3)2、Mn(OAc)2和Zn(NO3)2自组装得到5种新的配位聚合物{[M(3-bpt)(aip)(H2O)2]·(H2O)2}n (M = Ni为1,Co为2,Cu为3,Mn为4,Zn为5)。金属中心表现出相同的八面体配位环境。配体aip2−的羧基在所有结构中均采用相同的双单齿桥接模式。1-5中的这些低维配位基序通过氢键相互作用进一步扩展到三维(3D)超分子网络。此外,本文还对1-5的FT-IR光谱、元素分析和热重分析(TGA)进行了研究。
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引用次数: 0
Nanosized MgO as a Heterogeneous Base Catalysts, Catalyses Multicomponent Reaction of Cyclic Enaminoketones, Malononitrile, and Aromatic Aldehydes 纳米氧化镁作为非均相碱催化剂,催化环胺酮、丙二腈和芳香醛的多组分反应
Pub Date : 2016-04-02 DOI: 10.1080/15533174.2014.988812
M. Abaszadeh, M. Seifi, A. Asadipour
Nanosized MgO is an efficient catalyst for the synthesis of 1,4-dihydropyridine and imidazo[1,2-a]quinoline derivatives from multicomponent reaction of cyclic enaminoketones, malononitrile and aromatic aldehydes in EtOH at reflux condition. This method provides several advantages such as mild reaction and high yield with short reaction time.
纳米氧化镁是环胺酮、丙二腈和芳香醛在乙醚回流条件下多组分反应合成1,4-二氢吡啶和咪唑[1,2-a]喹啉衍生物的有效催化剂。该方法具有反应温和、收率高、反应时间短等优点。
{"title":"Nanosized MgO as a Heterogeneous Base Catalysts, Catalyses Multicomponent Reaction of Cyclic Enaminoketones, Malononitrile, and Aromatic Aldehydes","authors":"M. Abaszadeh, M. Seifi, A. Asadipour","doi":"10.1080/15533174.2014.988812","DOIUrl":"https://doi.org/10.1080/15533174.2014.988812","url":null,"abstract":"Nanosized MgO is an efficient catalyst for the synthesis of 1,4-dihydropyridine and imidazo[1,2-a]quinoline derivatives from multicomponent reaction of cyclic enaminoketones, malononitrile and aromatic aldehydes in EtOH at reflux condition. This method provides several advantages such as mild reaction and high yield with short reaction time.","PeriodicalId":22118,"journal":{"name":"Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76747385","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: 16
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Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry
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