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循环伏安(CV)合成(电沉积)聚苯胺? 各位好,溶液是0.5mol/L的 硫酸 ,0.1mol/L的 苯胺 ,-0.2V-1.0V,30mV/S,CV曲线见图。 问题:在对电极上沉积了一层绿绿的 聚苯胺 ,工作电极(Ti片)上没有?不知道是什么原因? 可以确定电极没有接反。谢谢啊 11.png查看更多 6个回答 . 21人已关注
哪种有机溶剂可以很好的溶解氰化钾? 在有机溶剂中,我们想用氰化钾参与反应,但是氰化钾在有机相中溶解性不好,各位大神有没有好的方法呀,不胜感激!查看更多 7个回答 . 14人已关注
薄膜分散法做脂质体? 请问各位做脂质体的大牛,在我在超声水化时易产生白色固体在底部是什么原因。是不是与随超声时间延长水温逐渐升高有关(表示只有 超声波清洗机 ,没办法控制温度)查看更多 2个回答 . 27人已关注
HER阴极极化曲线的分析? 小硕刚刚开始接触HER的相关研究,打算用镍的相关合金作为 催化剂 ,在1M NaOH初步做了一下LSV实验,电流取对数得出了Tafel曲线。结果发现Tafel曲线分两段,拟合后分别可以得到两条不同的直线。请问这种情况有人出现过吗?应该取哪一段进行拟合呢?谢谢各位QQ截图20140512153629.png查看更多 6个回答 . 29人已关注
超电赝电容钴镍材料? 赝电容钴镍电极材料现在还有创新可做么,目前哪里是是它的突破,感觉电容和循环性能也没多大差距…查看更多 3个回答 . 28人已关注
液相基线与进样的问题? 麻烦各位大虾指点下:朋友第一次做液相,开始通入 流动相 时基线就非常非常平,没有一点起伏。这是不是不太正常呀?请问是什么原因呢?还有就是我进了样品之后,样品也没有峰,真的很郁闷。烦请高人指点~谢谢!查看更多 3个回答 . 27人已关注
浸渍法制备NiMgAlK催化剂? 我用共沉淀法做的NiMgAl 催化剂 ,完事之后,用 碳酸钾 过量浸渍NiMgAl催化剂,我想制备K含量5%的NiMgAlK催化剂,我该怎么确定用多少碳酸钾溶液过量浸渍多少克NiMgAl催化剂,完事之后怎么知道浸渍了多少?? ?? ?? ?? ?? ?? ?急!查看更多 6个回答 . 24人已关注
中国锂电课题组介绍及其牛人文章统计? 中科院物理所陈立泉组,属于中科院物理所清洁能源实验室,主要成员包括,陈立泉院士、黄学杰研究员、李泓研究员、王兆翔研究员、胡勇胜研究员、肖睿娟副研究员、孙春文副研究员2010年所发表的文章统计1.Electrodeposited Aluminum-Doped α-Fe2O3 Photoelectrodes: Experiment and Theory, Alan Kleiman-Shwarsctein, Muhammad N. Huda, Aron Walsh, Yanfa Yan, Galen D. Stucky, Yong-Sheng Hu, Mowafak M. Al-Jassim and Eric W. McFarland, Chem. Mater., 2010, 22 (2), pp 510–5172.Highly Stable Lithium Storage Performance in a Porous Carbon/Silicon Nanocomposite, Yong-Sheng Hu, Philipp Adelhelm, Bernd M. Smarsly, Joachim Maier, ChemSusChem Special Issue: MPI EnerChem, Volume 3, Issue 2, pages 231–235, February 22, 20103.Composites of Molecular-Anchored Graphene and Nanotubes with Multitubular Structure: A New Type of Carbon Electrode, Xi Liu, Yong-Sheng Hu, Jens-Oliver Müller, Robert Schlogl, Joachim Maier, Dang Sheng Su, ChemSusChem Special Issue: MPI EnerChem, Volume 3, Issue 2, pages 261–265, February 22, 20104.The effects of substituting groups in cyclic carbonates for stable SEI formation on graphite anode of lithium batteries, X.J. Wang, H.S. Lee, H. Lia, X.Q. Yangb, X.J. Huang, Electrochemistry Communications, Volume 12, Issue 3, March 2010, Pages 386-3895.Lithium storage in hollow spherical ZnFe2O4 as anode materials for lithium ion batteries, Xianwei Guo, Xia Lu, Xiangpeng Fang, Ya Mao, Zhaoxiang Wang, , , Liquan Chen, Xiaoxue Xu, Hong Yang, Yinong Liu, Electrochemistry Communications, Volume 12, Issue 6, June 2010, Pages 847-8506.Electrode reactions of manganese oxides for secondary lithium batteries, Xiangpeng Fang, Xia Lu, Xianwei Guo, Ya Mao, Yong-Sheng Hu, Jiazhao Wang, Zhaoxiang Wang, Feng Wu, Huakun Liu, Liquan Chen, Electrochemistry Communications, Volume 12, Issue 11, November 2010, Pages 1520-15237.Electrochromic Behavior of Transparent Li4Ti5O12/FTO Electrode, Xiqian Yu, Rui Wang, Yu He, Yongsheng Hu, Hong Li, and Xuejie Huang, Electrochem. Solid-State Lett., Volume 13, Issue 8, pp. J99-J101 (2010)8.Low-Temperature Pseudomorphic Transformation of Ordered Hierarchical Macro-mesoporous SiO2/C Nanocomposite to SiC via Magnesiothermic Reduction, Yifeng Shi, Fan Zhang, Yong-Sheng Hu, Xiaohong Sun, Yichi Zhang, Hyung Ik Lee, Liquan Chen and Galen D. Stucky, J. Am. Chem. Soc., 2010, 132 (16), pp 5552–55539.Enhanced Electrochemical Performances of Carbon Coated Mesoporous LiFe0.2Mn0.8PO4, Bin Zhang, Xiaojian Wang, Zhaojun Liu, Hong Li, and Xuejie Huang, J. Electrochem. Soc., Volume 157, Issue 3, pp. A285-A288 (2010)10.Enhanced Activity and Stability of Cu–Mn and Cu–Ag Catalysts Supported on Nanostructured Mesoporous CeO2 for CO Oxidation, Xiao, Guoliang; Xian, Cunni; Li, Hong; Chen, Liquan, Journal of Nanoscience and Nanotechnology, Volume 11, Number 3, March 2011 , pp. 1923-1928(6)11.MnO powder as anode active materials for lithium ion batteries, Kaifu Zhong, Xin Xia, Bin Zhang, Hong Li, Zhaoxiang Wang, Liquan Chen, Journal of Power Sources, Volume 195, Issue 10, 15 May 2010, Pages 3300-330812.Factors that affect activation energy for Li diffusion in LiFePO4: A first-principles investigation, Zhaojun Liu, Xuejie Huang, Solid State Ionics, Volume 181, Issues 19-20, 16 July 2010, Pages 907-91313.Structural, electronic and Li diffusion properties of LiFeSO4F, Zhaojun Liu, Xuejie Huang, Solid State Ionics, Volume 181, Issues 25-26, 26 August 2010, Pages 1209-121314.Structural and textural characterization of LiFePO4 thin films prepared by pulsed laser deposition on Si substrates, C. Legrand, L. Dupont, K. Tang, H. Li, X.J. Huang, E. Baudrin, Thin Solid Films, Volume 518, Issue 19, 30 July 2010, Pages 5447-545115.First-principles investigation on redox properties of M-doped CeO2 (M=Mn,Pr,Sn,Zr), Yuanhao Tang, Hua Zhang, Lixia Cui, Chuying Ouyang, Siqi Shi, Weihua Tang, Hong Li, Jong-Sook Lee, and Liquan Chen, Phys. Rev. B 82, 125104 (2010)16.Ionic liquids based on (fluorosulfonyl)(pentafluoroethanesulfonyl)imide with various oniums, Kai Liu, Yi-Xuan Zhou, Hong-Bo Han, Si-Si Zhou, Wen-Fang Feng, Jin Nie, Hong Li, Xue-Jie Huang, Michel Armand, Zhi-Bin Zhou, Electrochimica Acta, Volume 55, Issue 23, 30 September 2010, Pages 7145-715117.Ionic liquid electrolytes based on multi-methoxyethyl substituted ammoniums and perfluorinated sulfonimides: Preparation, characterization, and properties, Hong-Bo Han, Kai Liu, Shao-Wei Feng, Si-Si Zhou, Wen-Fang Feng, Jin Nie, Hong Li, Xue-Jie Huang, Hajime Matsumoto, Michel Armand, Zhi-Bin Zhou, Electrochimica Acta, Volume 55, Issue 23, 30 September 2010, Pages 7134-714418.Flowerlike microspheres catalyst NiO/La2O3 for ethanol-H-2 production, Jie Suna, Jigang Lia, Cunni Xian, Ligong Zhang, Yulong Cheng, Hong Li, Liquan Chen, International Journal of Hydrogen Energy, Volume 35, Issue 21, November 2010, Pages 11687-1169219.H2 production from stable ethanol steam reforming over catalyst of NiO based on flowerlike CeO2 microspheres, Jie Sun, Yuguang Wang, Jigang Li, Guoliang Xiao, Ligong Zhang, Hong Li, Yulong Cheng, Chunwen Sun, Zhenxing Cheng, Zhongchao Dong, Liquan Chen, International Journal of Hydrogen Energy, Volume 35, Issue 7, April 2010, Pages 3087-3091--------------------------------------------------------------------------------2011年所发表的文章统计1.Direct Observation of Lithium Staging in Partially Delithiated LiFePO4 at Atomic Resolution, Lin Gu*, Changbao Zhu, Hong Li*, Yan Yu, Chilin Li, Susumu Tsukimoto, Joachim Maier, and Yuichi Ikuhara, J. Am. Chem. Soc., 2011, 133 (13), pp 4661–46632.Alumina-Coated Patterned Amorphous Silicon as the Anode for a Lithium-Ion Battery with High Coulombic Efficiency,He, Y (He, Yu); Yu, XQ (Yu, Xiqian); Wang, YH (Wang, Yanhong); Li, H (Li, Hong); Huang, XJ (Huang, Xuejie), ADVANCED MATERIALS, Volume 23, Issue 42, Page 4938-4941,(NOV 9 2011)3.Investigation on porous MnO microsphere anode for lithium ion batteries, Kaifu Zhonga, Bin Zhang, Shihai Luo, Wen Wen, Hong Li, Xuejie Huang, Liquan Chen, Journal of Power Sources, Volume 196, Issue 16, 15 August 2011, Pages 6802-6808, 15th International Meeting on Lithium Batteries (IMLB)4.Electrochemical performances of LiFe(1-x)MnxPO4 with high Mn content, Bin Zhang, Xiaojian Wang, Hong Li, Xuejie Huang, Journal of Power Sources, Volume 196, Issue 16, 15 August 2011, Pages 6992-6996, 15th International Meeting on Lithium Batteries (IMLB)5.Renewable Energy Frontier Research at the Institute of Physics Chinese Academy of Sciences, Hong Li and Qingbo Meng, Energy Environ. Sci., 2011, 4, 2613-26136.Thermodynamic analysis on energy densities of batteries, Chen-Xi Zu and Hong Li, Energy Environ. Sci., 2011, 4, 2614-26247.A comparative study of Fd-3m and P4332 “LiNi0.5Mn1.5O4”, Liping Wang, Hong Li, Xuejie Huang, Emmanuel Baudrin, Solid State Ionics, Volume 193, Issue 1, 30 June 2011, Pages 32-388.Morphological and catalytic stability of mesoporous peony-like ceria, C.N. Xian, H. Li, L.Q. Chen, J.S. Lee, Microporous and Mesoporous Materials, Volume 142, Issue 1, June 2011, Pages 202-2079.Lithium bis(fluorosulfonyl)imide (LiFSI) as conducting salt for nonaqueous liquid electrolytes for lithium-ion batteries: Physicochemical and electrochemical properties, Hong-Bo Han, Si-Si Zhou, Dai-Jun Zhang, Shao-Wei Feng, Li-Fei Li, Kai Liu, Wen-Fang Feng, Jin Nie, Hong Li, Xue-Jie Huangb, Michel Armandc, Zhi-Bin Zhou, Journal of Power Sources, Volume 196, Issue 7, 1 April 2011, Pages 3623-363210.Porous Li4Ti5O12 Coated with N-Doped Carbon from Ionic Liquids for Li-Ion Batteries, Liang Zhao, Yong-Sheng Hu, Hong Li, Zhaoxiang Wang, Liquan Chen, Advanced Materials, Volume 23, Issue 11, pages 1385–1388, March 18, 201111.Enhanced Activity and Stability of Cu-Mn and Cu-Ag Catalysts Supported on Nanostructured Mesoporous CeO2 for CO Oxidation, Xiao, Guoliang; Xian, Cunni; Li, Hong; Chen, Liquan, Journal of Nanoscience and Nanotechnology, Volume 11, Number 3, March 2011 , pp. 1923-1928(6)12.Investigation of the structural changes in Li(1-x)FePO4 upon charging by synchrotron radiation techniques, Xiao-Jian Wang, Cherno Jaye, Kyung-Wan Nam, Bin Zhang, Hai-Yan Chen, Jianming Bai, Hong Li, Xuejie Huang, Daniel A. Fischer and Xiao-Qing Yang, J. Mater. Chem., 2011, 21, 11406-1141113.A new in situ synchrotron X-ray diffraction technique to study the chemical delithiation of LiFePO4, Xiao-Jian Wang, Hai-Yan Chen, Xiqian Yu, Lijun Wu, Kyung-Wan Nam, Jianming Bai, Hong Li, Xuejie Huang and Xiao-Qing Yang, Chem. Commun., 2011, 47, 7170-717214.Transport and Electrochemical Properties and Spectral Features of Non-Aqueous Electrolytes Containing LiFSI in Linear Carbonate Solvents, Lifei Li, Sisi Zhou, Hongbo Han, Hong Li, Jin Nie, Michael Armand, Zhibin Zhou, and Xuejie Huang, J. Electrochem. Soc., Volume 158, Issue 2, pp. A74-A82 (2011)15.A 3.9 V polyanion-type cathode material for Li-ion batteries, Liu, L (Liu, Lei); Zhang, B (Zhang, Bin); Huang, XJ (Huang, Xue-jie), PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL, Volume 21, Issue 3, Page 211-215 (JUN 2011)16.Structural Design and Modification of Cathode Materials for Lithium Ion Batteries, Wang, ZX (Wang Zhaoxiang); Chen, LQ (Chen Liquan); Huang, XJ (Huang Xuejie), PROGRESS IN CHEMISTRY, Volume 23, Issue 2-3, Page 284-301, (MAR 2011)17.Polypyrrole-iron-oxygen coordination complex as high performance lithium storage material, Ya Mao, Qingyu Kong, Bingkun Guo, Xiangpeng Fang, Xianwei Guo, Lian Shen, Michel Armand, Zhaoxiang Wang and Liquan Chen, Energy Environ. Sci., 2011, 4, 3442-344718.Atomic-scale investigation on lithium storage mechanism in TiNb2O7, Xia Lu, Zelang Jian, Zheng Fang, Lin Gu, Yong-Sheng Hu, Wen Chen, Zhaoxiang Wang and Liquan Chen, Energy Environ. Sci., 2011, 4, 2638-264419.Nano-CaCO3 templated mesoporous carbon as anode material for Li-ion batteries, Bin Xua, Lu Shi, Xianwei Guo, Lu Peng, Zhaoxiang Wang, Shi Chen, Gaoping Cao, Feng Wu, Yusheng Yang, Electrochimica Acta, Volume 56, Issue 18, 15 July 2011, Pages 6464-646820.Capacitive Energy Storage on Fe/Li3PO4 Grain Boundaries, Xianwei Guo, Xiangpeng Fang, Ya Mao, Zhaoxiang Wang, Feng Wu, and Liquan Chen, J. Phys. Chem. C, 2011, 115 (9), pp 3803–380821.Towards understanding the effects of carbon and nitrogen-doped carbon coating on the electrochemical performance of Li4Ti5O12 in lithium ion batteries: a combined experimental and theoretical study, Zijing Ding, Liang Zhao, Liumin Suo, Yang Jiao, Sheng Meng, Yong-Sheng Hu, Zhaoxiang Wang and Liquan Chen, Phys. Chem. Chem. Phys., 2011, 13, 15127-1513322.LiNb3O8 as a novel anode material for lithium-ion batteries, Zelang Jiana, Xia Lu, Zheng Fang, Yong-Sheng Hu, Jing Zhou, Wen Chen, Liquan Chen, Electrochemistry Communications, Volume 13, Issue 10, October 2011, Pages 1127-113023.Ionic-Liquid Synthesis Route of TiO2(B) Nanoparticles for Functionalized Materials, Claas Wessel, Liang Zhao, Sven Urban, Rainer Ostermann, Dr. Igor Djerdj, Prof. Bernd M. Smarsly, Prof. Liquan Chen, Prof. Yong-Sheng Hu, Dr. Sébastien Sallard,Chemistry - A European Journal, Volume 17, Issue 3, pages 775–779, January 17, 2011复旦大学 夏永姚教授----水系 锂离子电池 2010年文章,2011年暂缺1、??Jia-Yan Luo, Wang-Jun Cui, Ping He, and Yong-Yao Xia* , “Raising the Cycling Stability of Aqueous Lithium-Ion Batteries by Eliminating O 2 in the Electrolyte ”, Nature Chemistry, In press, 2010. 2、??Hai -J ing Liu, Xiao -M ing Wang, Wang -J un Cui, Yu -Q ian Dou, Dong -Y uan Zhao, Yong-Yao Xia *. “Highly ordered mesoporous carbon nanofiber arrays from a crab shell biological template and its application in supercapacitors and fuel cells”. J. Mater. Chem . 20: 4223-4230 ( 2010 ). 3、 Liang Cheng, Jing Yan, Guan -N an Zhu, Jia -Y an L uo, Cong -X iao Wang, Yong-Yao Xia *. “General synthesis of carbon-coated nanostructure Li 4 Ti 5 O 12 as a high rate electrode material for Li-ion intercalation”. J. Mater. Chem . 20: 595-602 (2010 ). 4、 Xiao -M ing Wang, Yong-Yao Xia * . “The influence of the crystal structure of TiO 2 support material on Pd catalysts for formic acid electrooxidation”. Electrochim Acta . 55: 851-856 (2010 ). 5、??Xin -H ui Yang, Yong-Yao Xia * . “The effect of oxygen pressures on the electrochemical profile of lithium/oxygen battery”. J Solid State Electrochem. 14: 109-114 (2010).厦门大学 孙世刚Na Tian, Zhi-You Zhou, Shi-Gang Sun*, Yong Ding, Zhong Lin Wang*, Synthesis of Tetrahexahedral Platinum Nanocrystals with High-Index Facets and High Electro-Oxidation Activity, Science, 2007, 316: 732-735.Hong-Gang Liao, Yan-Xia Jiang*, Zhi-You Zhou, Sheng-Pei Chen, Shi-Gang Sun*, Shape-controlled synthesis of gold nanoparticles in deep eutectic solvents for studies of structure-functionality relationships in electrocatalysis, Angew. Chem. Int. Ed., 2008, 47: 9100-9103.Na Tian, Zhi-You Zhou, Shi-Gang Sun*, Platinum Metal Catalysts of High-Index Surfaces: From Single-Crystal Planes to Electrochemically Shape-Controlled Nanoparticles, J. Phys. Chem. C, Feauture Article, 2008, 112 (50): 19801-19817.Na Tian, Zhi-You Zhou and Shi-Gang Sun*, Electrochemical preparation of Pd nanorods with high-index facets, Chemical Communications, 2009, 1502 – 1504.Ling Huang*, Xiao-Mei Zheng, Yun-Shi Wu, Lian-Jie Xue, Fu-Sheng Ke, Guo-Zheng Wei, Shi-Gang Sun*, Electrodeposition and lithium storage performance of novel three-dimensional porous Fe–Sb–P amorphous alloy electrode, Electrochemistry Communications,2009,11:585-588.Yong-Jun Li, Wei-Jun Huang, and Shi-Gang Sun*, A Universal Approach for the Self-Assembly of Hydrophilic Nanoparticles into Ordered Monolayer Films at a Toluene/Water Interface, Angew. Chem. Int. Ed., 2006, 118, 2599–2601.Na Tian, Zhi-You Zhou, Shi-Gang Sun*, Li Cui, Bin Ren and Zhong-Qun Tian,Electrochemical preparation of platinum nanothorn assemblies with high surface enhanced Raman scattering activity, Chem. Commun., 2006, 4090-4092.Qi-Hui Wu, Nan-Hai Li, and Shi-Gang Sun*, Manipulation of Electrocatalytic Reaction Pathways through Surface Chemistry: In Situ Fourier Transform Infrared Spectroscopic Studies of 1,3-Butanediol Oxidation on a Pt Surface Modified with Sb and S Adatoms,J. Phys. Chem. B, 2006, 110, 11383-11390.You-Jun Fan, Chun-Jie Fan,Chun-Hua Zhen, Shi-Gang Sun*, Electrochemical characterization of kinked Pt(751) surface in acidic media, Electrochim. Acta, 2006, 52: 945-950.查看更多 7个回答 . 24人已关注
水热反应釜的温度? 在做水热合成的过程中,用的是水和 乙醇 做溶剂,温度为200℃反应12h和18小时,发现 反应釜 均有不同程度的损坏(像融化了一样),现在想降低温度到190℃,各物质的用量比例都要换吗,还按照原来的比例有可能合成200℃的产物吗查看更多 5个回答 . 9人已关注
聚多巴胺纳米颗粒的合成问题? 按照文献合成的,正常应该可以通过调节DA的浓度控制particle的尺寸,但是我合成出来的东西不是小球状,有点像不规则圆形片的堆积,我想问下,在合成过程中是否有什么需要注意的,比如,DA加入时是否需要很快的速度,或者其他需要注意的地方查看更多 4个回答 . 9人已关注
气相色谱中转化率计算? 气相色谱 中应用面积归一算转化率收率。A---E,??A还生成B+C,少量B生成D。其中B是目标产物,请问A的转化率和B的收率怎么算。转化率=E+B+D/A剩余+E+B+D对吗查看更多 6个回答 . 27人已关注
用液相标准曲线法定量已知物的浓度,但是峰形很怪,基线不好,拖尾严重,如何改善? 用HPLC标准曲线法定量已知物的浓度,但是需要定量的物质峰形很怪,基线不好,拖尾严重,如何改善?化合物是酰胺,用 甲醇 溶解的,洗脱体系是 乙腈 和水,梯度洗脱:0-1min 25%? ?1-2min升至100%? ?2-6min 100%? ?6-7min降至25%? ?7-8min 25%。请高手指点。附图分别是0.5umol/ml,1umol/ml,2umol/ml,2.5umol/ml时的液相图,最后一张是未知浓度的化合物的液相图。0.5.png(15.65KB)http://kuai.xunlei.com/d/LnU4DRTpiZLqUAQA097?p=1304971.png(15.1KB)http://kuai.xunlei.com/d/LnU4DRfpoJLqUAQA45e?p=1304972.png(14.92KB)http://kuai.xunlei.com/d/LnU4DR3p05LqUAQA1cc?p=1304972.5.png(14.72KB)http://kuai.xunlei.com/d/LnU4DSfpNZPqUAQA4cc?p=130497未知.png(15.62KB)http://kuai.xunlei.com/d/LnU4DSzpWpPqUAQAf42?p=130497查看更多 6个回答 . 19人已关注
请问怎么通过充放电曲线看材料的充放电平台呢? RT,这是我在网上找的曲线图,小弟锂电新手,还请大家指教!查看更多 7个回答 . 15人已关注
湿固化聚氨酯胶黏剂,如何做到低粘度,短开放时间,如图? 如图查看更多 0个回答 . 24人已关注
我现在急求一个表面活性剂,用水乳化油脂类产品,但是电解质含量特别高? 请问什么类型的 表面活性剂 好现在用的是aeo系列和tx系列,感觉都达不到满意的效果查看更多 2个回答 . 16人已关注
氢气发生器示数降不下来!!!!? 型号为SHC300山东 赛克 赛斯 氢气发生器 一直维持在400ml/min降不下来,这是怎么回事呢?? 电解液 时间久了,今天换了新电解液还是不行!求大神指点,谢谢!!!查看更多 4个回答 . 3人已关注
请帮我看看怎么清洗的掉? 机床上的油脂去掉后,变色留下的痕迹查看更多 3个回答 . 9人已关注
如何提高底漆打磨性。? 环氧改性醇酸底漆,夏季时烘烤后放4个小时就可以打磨,但到冬季室温10度左右,烘烤后放16小时打磨还粘砂纸,现在配方里已经有锰和锆的 催干剂 ,还有什么办法提高吗?查看更多 2个回答 . 16人已关注
甲醇和水的混合液 有关问题? 安捷伦 高效液相色谱仪 上机。? ? 甲醇 和水按照21:79比例混合4L 。方法一:按照790ml水 与210ml甲醇每次一升混合抽滤 连续4次(量筒校准了的);方法二:用5L量杯,一次装入4L 混合液 混匀后抽滤 (比例为20:80);(该方法也是用量筒量取的)问:为什么两次出峰时间相差好几分钟?查看更多 7个回答 . 13人已关注
721型分光光度法测稀土含量如何掩蔽铝? 采用721型分光光度法测定废 催化剂 中的稀土含量,用 偶氮胂 三法络合金属显色,在650nm下测定吸光度,我们用 磺基水杨酸 掩蔽铝,效果不好,在此想问问高人,还有什么可以掩蔽铝的。??另外,文献说用乙酰丙酮做掩蔽剂,可是乙酰丙酮在水中不溶,如何用乙酰丙酮做掩蔽铝的实验?望知道的朋友帮帮忙,万分感谢!查看更多 3个回答 . 18人已关注
简介
职业:上海安赐环保科技股份有限公司 - 设备维修
学校:龙岩学院 - 化学与材料工程系
地区:广东省
个人简介:我们是法律的仆人,以便我们可以获得自由。查看更多
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