检索结果-南通市图书馆

江苏化工 2000年第9期 24-24页

作者：梁英杨凤茹罗岚襄樊学院化学化工系! 441053

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

块状离聚络合物—新型环保材料

化工科技市场 2002年第9期25卷 33-33页

Au＋-cetyltrimethylammonium bromide solution： A novel precursor for seed-mediated growth of gold nanoparticles in aqueous solution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2013年第1期6卷 29-37页

作者： Chaoyu Li Fengru Fan Bingsheng Yin Liang Chen Tapan Ganguly Zhongqun Tian State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China Department of Physics Bengal Engineering and Science University Shibpur Howrah 711103 India

一位金属性的先锋的化学作文的适当选择，在 nanocrystals 的生长过程生产基本结构单位，是在合成的高优先级金属特别 Au-nanoparticles。在现在的工作， Au 播种(面对 cetyltrimethylammonium 溴化物(CTAB ) 与 NaBH4 由 Au3+ 答案的... 详细信息

一位金属性的先锋的化学作文的适当选择，在 nanocrystals 的生长过程生产基本结构单位，是在合成的高优先级金属特别 Au-nanoparticles。在现在的工作， Au 播种(面对 cetyltrimethylammonium 溴化物(CTAB ) 与 NaBH4 由 Au3+ 答案的减小准备了) 被用来从二位不同 Au 先锋开始 Au nanoparticles 的生长。当面对 CTAB 微粒准备的水的 Au+ 溶液面对金种子与维生素酸被对待时，金 nanoparticles 的高收益(多达 92%) 被获得。由与 Au+ 的固定数量改变种子解决方案的卷，我们能有效地从立方体控制产生 Au nanoparticles 的词法转变到 octahedra。当一个水的 Au3+ 答案面对 CTAB 微粒被准备并且面对金种子与维生素酸对待时， Au nanoparticles 的更小的收益被获得。初步的生长机制基于改变维生素酸和 Au+ 的集中的比率的数量到种子的数字导致的变化被建议了。

关键词：十六烷基三甲基溴化铵金纳米粒子生长过程水溶液种子前体 CTAB胶束 Au纳米粒子

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

石墨烯水溶液的分散性研究

科技视界 2014年第11期 220-220,289页

作者：蔡雨楠徐晨孙凤梅南京信息职业技术学院微电子学院江苏南京210046

本文通过添加十六烷基三甲基溴化铵、十二烷基磺酸钠两种物质,改变石墨烯在水中的分散性。研究结果表明:对于0.5mg/mL的氧化石墨烯水溶液,通过添加十二烷基磺酸钠使其浓度为0.5mg/mL,并加入还原剂氢碘酸,可获得稳定分散的石墨烯水溶液;... 详细信息

本文通过添加十六烷基三甲基溴化铵、十二烷基磺酸钠两种物质,改变石墨烯在水中的分散性。研究结果表明:对于0.5mg/mL的氧化石墨烯水溶液,通过添加十二烷基磺酸钠使其浓度为0.5mg/mL,并加入还原剂氢碘酸,可获得稳定分散的石墨烯水溶液;十六烷基三甲基溴化铵改性的石墨烯溶液分散性尚可,但溶液下面出现白色絮状沉淀。

关键词：石墨烯十二烷基磺酸钠十六烷基三甲基溴化铵

Application of Statistical Design Strategies to Optimize the Preparation of ZnO Nanoparticles by Hydrothermal Technique

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Science and Engineering 2010年第6期4卷 67-72页

作者： I.A. Mkhalid Chemistry Department Faculty of Science King Abdul Aziz university Jeddah 80203 KSA

Synthesis of ZnO nanoparticles by hydrothermal technique in presence of cetyltrimethylammonium bromide (CTAB) as surfactant was carried out by statistically designed experiments based on Box Behnken method. The mean parameters, surfactant concentration, time and temperature have been studied to show their effect on ZnO particle size and morphology. The results of experimental design indicate that the surfactant concentration, reaction time and temperature were significant. ZnO particles were investigated using XRD and SEM and the findings show that ZnO nanoparticles were formed at 100 ℃ and their crystallinity were improved with temperature rise from 100 to 200 ℃. Particle size of ZnO in the range of 39-76 nm is achieved using this technique.

关键词： ZnO纳米粒子统计方法氧化锌设计策略十六烷基三甲基溴化铵水热法表面活性剂制备

The effect of surfactants on the particle size and optical properties of precipitated ZnO nanoparticles

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

材料科学与工程：中英文版 2009年第12期3卷 38-43页

作者： Jamil Kamal Salem Talaat Moussa Hammad Faculty of Science Al-Azhar University P.O. Box 1277 Gaza Palestine

Spectrophotometric Investigation of Complex Formation of Ge（IV） with Bis（2,3,4-Trigidroksifenilazo） Benzidine in the Presence of Cationic Surfactants Active Substances

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Chemistry and Chemical Engineering 2014年第1期8卷 21-24页

作者： Mardanova Samira Rafiq Alieva Rafiqa Alirza Bahmanova Fidan Nariman Chyragov Famil Musa Ganja State University Ganja AZ-2000 Azerbaidjan Baku State University Baku AZ-1148 Azerbaidjan

It is investigated the interaction of Ge(IV) with bis(2,3,4-trigodroksifenolazo) benzidine (R) in the presence of KSAS (cationic surface active substances)-CPCl (cetylpyridinium chloride), CPBr (cetylpyridinium bromide) and CTMABr (cetyltrimethylammonium bromide). It is studied the effect pH, time on the formation of ternary complexes. It is determinated of molar absorption coefficients and stability constants of germanium. Binary (Ge-R) and triple (Ge-R-CPCl, Ge-R-CPBr, Ge-R-C M Br) complex form at pH 4 and pH 1, respectively. The composition proportion of binar system is 1 2 and the composition proportion triple complex is 1 1 2. The concentration interval of germanium which obeying beer low in the Ge-R 0.12-2.92 mkq/mL, in the Ge-R-CPCl is 0.04-1.46 mkq/mL, in the Ge-R-CPBr is 0.00-1.00 mkq/mL and in the Ge-R-C M Br is 0.00-1.00 mkq/mL. Molar absorbtivities of complexes are 45,000, 57,000, 59,000 and 60,000, respectively. The effect of interfering ions and masking agents has been learned. Stability constants of complexes have been determined lgK1 = 7.21 0.06 (Ge-R), lgK1 = 12.08 0.05 (Ge-R-CPCl), lgK1 = 12.12 0.07 (Ge-R-CPBr) and lgK1 = 12.85 0.06 (Ge-R-C M Br). It is developed highly selective method of photometric determination of trace amounts of Ge(IV) in petroleum coke.

关键词：阳离子表面活性剂表面活性物质三元复合物联苯胺分光光度法十六烷基三甲基溴化铵氯化十六烷基吡啶溴化十六烷基吡啶

Genetic Diversity of Apple Cactus, Cereus peruvianus Mill. Clones （Cactaceae） and Its F1 Hybrids Using Random Amplified Polymorphic DNA in Indonesia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Life Sciences 2014年第5期8卷 410-417页

作者： Nandariyah Sukaya Bambang Pujiasmanto Plant Breeding Laboratory Agrotechnology Program Study Agricultural Faculty University of Sebelas Maret Surakarta 57125Indonesia Physiology and Biotechnology Laboratory Agrotechnology Program Study Agricultural Faculty University of Sebelas MaretSurakarta 57125 Indonesia

Polymorphism in two types of Cereus peruvianus, short and long spines clones, and its F 1 hybrids cultivated in Indonesia were detected by RAPD (Random Amplified Polymorphic DNA) markers. High amount of mucilage (gelling polysaccharides) present in C. peruvianus was a major obstacle in isolating good quality genomic DNA. To obtain good quality DNA, the CTAB (Cetyl Trimethyl Ammonium Bromide) methode was modified. Out of 17 primers were used, and two primers OPN-05 and OPM-10 have specific loci, OPN-05 550, OPN-05 800 and OPM-10 650, linked with spines types in parents clones. Those can be used as molecular marker for spines type. Seventeen primers were used generated 113 loci, of which 65 loci were polymorphic in parental clones and 132 loci, of which 93 loci were polymorphic in F 1 plants. Dendrogram generated by Jaccard coefficient showed that parents" clones had lower genetic diversity than F 1 plants. At 72% similarity, all of long or short spine parent clones grouped in one cluster according to its size of spines. At that time F 1 plants were separately grouped. None of F 1 hybrid plants grouped with its common female parents.

关键词：随机扩增多态性DNA 遗传多样性杂种F1 仙人掌克隆十六烷基三甲基溴化铵苹果印尼

Cracking of Palm Oil over H-AIMCM-41 Catalyst

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Chemistry and Chemical Engineering 2012年第6期6卷 531-535页

作者： Suyanta Suyanta Falah Iip Izul Chemistry Department Gadjah Mada University Yogyakarta Indonesia

The objective of this research was to develop a catalyst for efficient cracking of palm oil to produce biogasoline. Mesoporous alumino-silicate, AlMCM-41, was synthesized by hydrothermal treatment to the mixture of sodium silicate, sodium aluminates, TMAOH (tetramethylammonium hydroxide), and CTMAB (cetyltrimethylammonium bromide), in Aquadest as a solvent. This process was carried out within 12 h of aging time at 100 oC in a teflon-lined stainless steel autoclave. The solid phase was filtered, then washed with distilled water, and dried in an oven at 80 oC for 24 h. The surfactant CTMAB was removed by calcination at 540 oC for 6 h using heating rate of 2 oC/min. The as-synthesized and calcined powder was characterized by using FTIR (frontier transform infra red spectroscopy), XRD (X-ray diffraction), and TEM (transmission electron microscopy) methods. The product of AlMCM-41 was then converted into H-AlMCM-41 by ion exchanged in 0.5 M of NH4Cl solution followed by filtration, drying at 80 oC for 24 h, and calcination at 540 oC. The product of catalyst was used for catalytic conversion of PO (palm oil) to biogasoline in a fixed bed reactor at 200-400 oC, under atmospheric pressure, and ratio of PO to catalyst was 200. The product of cracking was then distilled at 60 oC and analyzed using GC-MS (gas liquid chromatography – mass spectrometry) method. Result of the works shows that the catalyst had 4.49 nm of lattice parameter, and the cracking of PO gave 56.6% conversions with 29.4% selectivity to biogasoline like fraction.

关键词：裂解催化剂棕榈油十六烷基三甲基溴化铵开裂四甲基氢氧化铵透射电子显微镜 X射线衍射固定床反应器

Cracking of a Used Lubricant Oil Using NiMo/MCM-41 and the Mixture of Ni/MCM-41 and H-MCM-41 Catalysts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

化学与化工：英文版 2013年第2期7卷 95-101页

作者： Falah lip Izul Armunanto Ria Pratama Aristo Tyas Chemistry Department Gadjah Mada University Yogyakarta 55281 Indonesia

Catalytic activities of NiMo/MCM-41 and the mixture of Ni/MCM-41 with H-MCM-41 in cracking used ULO (lubricant oil) have been studied. This work was started by synthesis of aluminosilicate (MCM-41) at ratio of Si/Al = 50, using CTAB (cetyltrimethylammonium bromide) as a template, and TMAOH (tetramethylammonium hydroxide) as co-surfactant, where a hydrothermal process at 100 oC was conducted for 12 h. Organic compounds were then burned out from the dry solid material by calcination at 540 oC. Ni/MCM-41 and H-MCM-41 were produced by ion exchange method, followed by reduction and calcination treatments, respectively, while NiMo/MCM-41 was produced by impregnation method followed by calcination. Product of MCM-41 was characterized by XRD (X-ray Diffraction), Fourier FTIR (transform infra red spectrophotometric), TEM (transmission electron microscopic) and BET (brunauer-emmet-teller) methods. Performance of the catalytic activities were shown by both of NiMo/MCM-41 and the mixture of 1:1 of H-MCM-41 and Ni/MCM-41 were mixed with the ULO at ratio of 1:200 (w/v) in a stainless steel reactor, then they were heated at 420 oC. The products of cracking were analyzed using GC-MS (gas chromatography-mass spectrometry). Results of the work showed that the MCM-41 was successfully synthesized. Using mixture of Ni/MCM-41 and H-MCM-41 catalysts, 56.6% of ULO could be converted to OLP (organic liquid product). However, using NiMo/MCM-41 catalyst only 28.5% OLP could be produced. GC-MS analyses showed that cracking of the ULO at 420 oC using NiMo/MCM-41 catalyst gave conversion 4.3% and 8.8% to gasoline like and diesel like fractions, respectively, while using mixture of Ni/MCM-41 and H-MCM-41 catalysts, conversion of 12.2% and 14.8% respectively to gasoline like and diesel like fractions were obtained.

关键词：润滑油使用催化剂混合物开裂十六烷基三甲基溴化铵 GC-MS分析 MCM-41 傅立叶红外光谱