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81.
JiangBinXIA FuYouLI ShuMingYANG ChunHuiHUANG 《中国化学快报》2004,15(5):619-622
Composite nanoporous electrode SnO2/TiO2 was fabricated for the dye sensitized solar cell (DSSC) with N3 (Cis-Ru). After introducing of TiO2, the open-circuit photovoltage (Voc) was higher than that of the pure SnO2 electrode, while short-circuit photocurrent (Isc) was varied with the ratio of the TiO2. Appropriate content of the TiO2 can be beneficial to the efficiency of the solar cell, and it gives negative impact on the composite electrode when the content of TiO2 is higher. 相似文献
82.
Characterization and electrochemical investigation of boron-doped mesocarbon microbead anode materials for lithium ion batteries 总被引:1,自引:0,他引:1
Mao-Hui Chen Guo-Tao Wu Guang-Ming Zhu Jin-Kua You Zu-Geng Lin 《Journal of Solid State Electrochemistry》2002,6(6):420-427
The structure and anodic performance of boron-doped and undoped mesocarbon microbeads (MCMBs) have been comparatively studied
and the results obtained by XPS, XRD, SEM, Raman spectroscopy and electrochemical measurements are discussed. It is found
that boron doping introduces a depressed d
002 spacing and the larger amount of "unorganized carbon", which induces vacancy formation in the graphite planes and leads to
a quite different morphology from that of the undoped material. Electrochemical charge/discharge cycle tests indicated that
after boron doping the lithium intercalation was carried through at a somewhat higher potential, being attended by greater
irreversible capacity loss.
Electronic Publication 相似文献
83.
Synthesis of a Photolabeling Probe for the Study of Antiviral Mechanism of Ribavirin 总被引:1,自引:0,他引:1
QiongYouwu XunZHU JinQiaoWAN FanQiQU LingPENG 《中国化学快报》2004,15(8):907-910
Ribavirin has been used in urgency to treat SARS patients recently. In order to study its antiviral mechanism by photolabeling approach, we have synthesized and characterized 5-azido-1-β-D-ribofuranosyl-1,2,4-triazole-3-carboxiamide 1 as a photolabeling probe of ribavirin. The azidotriazole nucleoside showed rapid and clean photochemical reaction, suggesting that 1 is a promising probe to study the antiviral mechanism ofribarivin by photolabeling. 相似文献
84.
85.
流动分析法同时测定铬(Ⅵ)及铬(Ⅲ)过程中铈(Ⅳ)氧化剂的影响 总被引:3,自引:0,他引:3
以Ce(Ⅳ)为氧化剂,采用流动分析在线氧化技术,实现了对Cr(Ⅵ)和Cr(Ⅲ)的同时在线分析,发现Ce(Ⅳ)氧化剂在测定过程中产生负干扰,在而Cr(Ⅲ)存在时会使Cr(Ⅵ)的测定结果偏高,本文提出了一个校正模型,通过数学方法消除上述干扰,所建立的分析方法对Cr(Ⅵ)和Cr(Ⅲ)分析的平均相对误差不大于6.5%。 相似文献
86.
镧系元素杂多钼磷酸钾的合成与性质研究 总被引:6,自引:0,他引:6
本文首次报道了K_(17)[Ln(P_2Mo_(17)O_(61))_2]·xH_2O(Ln=La~(3+),Ce~(3+),pr~(3+),Nd~(3+),Sm~(3+),Eu~(3+),Gd~(3+),Tb~(3+),Yb~(3+))的合成方法,取测定结果表明,与(?)系离子配位的配体P_2Mo_(17)O♂♀~-为α_2-型,Ln的配位数为8,推测其结构类似于K_(16)[Ce(Ⅳ)(α_2-P_2W_(17)O_(61))_2]·xH_2O,还进行了UV光谱、CV、极谱、TG-DTA及磁化率等性质的研究。 相似文献
87.
A density functional theory is proposed for an inhomogeneous hard-core Yukawa (HCY) fluid based on Rosenfeld's perturbative method. The excess Helmholtz energy functional is derived from a modified fundamental measure theory for the hard-core repulsion and a quadratic functional Taylor expansion for the long-ranged attractive or repulsive interactions. To test the established theory, grand canonical ensemble Monte Carlo simulations are carried out to simulate the density profiles of attractive and repulsive HCY fluid near a wall. Comparison with the results from the Monte Carlo simulations shows that the present density functional theory gives accurate density profiles for both attractive and repulsive HCY fluid near a wall. Both the present theory and simulations suggest that there is depletion for attractive HCY fluid at low temperature, but no depletion is found for repulsive HCY fluid. The calculated results indicate that the present density functional theory is better than those of the modified version of the Lovett-Mou-Buff-Wertheim and other density functional theories. The present theory is simple in form and computationally efficient. It predicts accurate radial distribution functions of both attractive and repulsive HCY fluid except for the repulsive case at high density, where the theory overestimates the radial distribution function in the vicinity of contact. 相似文献
88.
A high-performance liquid chromatographic method is described for the selective determination of taurine in biological fluids by post-column fluorescence reaction. Taurine was separated on an adsorption-distribution type Shodex Ionpac KC-811 column. Then it was converted with hypochlorite into the corresponding N-chloramine, which was allowed to react with thiamine to give fluorescent thiochrome. As little as 6 ng per injection of taurine could be determined. The average recoveries of spiked taurine in serum and urine were 99.5 +/- 2.7 and 101.8 +/- 2.9%, respectively. The method could be applied to the assay of taurine in human serum and urine with simple pretreatment. 相似文献
89.
Several 2,4-diaminothiazoles and 2,4-diaminothiophenes could be easily obtained by metallation using LDA from aminomethylthiomethylenecyanamides and aminomethylthiomethylenemalononitrile, respectively. 相似文献
90.
Sano S Takehisa T Ogawa S Yokoyama K Nagao Y 《Chemical & pharmaceutical bulletin》2002,50(9):1300-1302
Tetrasubstituted (Z)-alkenes were readily prepared through the Horner-Wadsworth-Emmons reactions of methyl 2-[bis(2,2,2-trifluoroethyl)phosphono]propionate with aryl alkyl ketones by employing Sn(OSO(2)CF(3))(2) and N-ethylpiperidine. 相似文献