气相色谱法测定催化剂中的积碳量

燃烧色谱法已用于测定钢铁等黑色金属中的碳。由于氧气既作燃烧气又作载气,检测灵敏度低,若选用氦气做载气,成本较高。王华明等采用氢气做载气,并用CO_2气体绘制标准曲线,由于气体体积进样的准确度较差,使该标准曲线线性欠佳,而且他们在测定催化剂的积碳量时,未做系统误差的检验。我们在燃烧炉中燃烧石墨-氧化铝混合物以制作标准曲线,线性     

Flexible supercapacitor electrodes with vertically aligned carbon nanotubes grown on aluminum foils

In this work, vertically aligned carbon nanotubes (VACNTs) grown on aluminum foils were used as flexible supercapacitor electrodes. Aluminum foils were used as readily available, cheap and conductive substrates, and VACNTs were grown directly on these foils through chemical vapor deposition (CVD) method. Solution based ultrasonic spray pyrolysis (USP) method was used for the deposition of the CNT catalyst. Direct growth of VACNTs on aluminum foils ruled out both the internal resistance of the supercapacitor electrodes and the charge transfer resistance between the electrode and electrolyte. A specific capacitance of 2.61 mF/cm2 at a scan rate of 800 mV/s was obtained from the fabricated electrodes, which is further improved through the bending cycles.     

Double carbon decorated lithium titanate as anode material with high rate performance for lithium-ion batteries

Spinel lithium titanate(Li_4Ti_5O_(12)) has the advantages of structural stability, however it suffers the disadvantages of low lithium-ion diffusion coefficient as well as low conductivity. In order to solve issues,we reported a simple method to prepare carbon-coated Li_4Ti_5O_(12)/CNTs(C@Li_4Ti_5O_(12)/CNTs) using stearic acid as surfactant and carbon source to prepare carbon coated nanosized particles. The obtained Li_4Ti_5O_(12) particles of 100 nm in size are coated with the carbon layers pyrolyzed from stearic acid and dispersed in CNTs matrix homogeneously. These results show that the synthesized C@Li_4Ti_5O_(12)/CNTs material used as anode materials for lithium ion batteries, presenting a better high-rate performance(147 m Ahg~(-1)at20 C). The key factors affecting the high-rate properties of the C@Li_4Ti_5O_(12)/CNTs composite may be related to the synergistic effects of the CNTs matrix and the carbon- coating layers with conductivity enhancement. Additionally, the amorphous carbon coating is an effective route to ameliorate the rate capability of Li_4Ti_5O_(12)/CNTs.     

高压氧治疗急性一氧化碳中毒后迟发性脑病疗效分析

目的 探讨急性一氧化炭中毒后迟发性脑病（ＤＥＡＣＭＰ）采取高压氧治疗后的效果。方法 将４０例包性一氧化碳中毒后迟发性脑病的病人随机分成两组治疗，观察病人精神、意识、锥体外系、锥体外系的变化以及生活能力变化等。结果 高压氧治疗组临床疗效评分提高比率、神经精神障碍、锥体外系及锥体系症状好转均明显高于对照组。结论 高压氧治疗ＤＥＡＣＭＰ可明显改善病人神经精神障碍及锥体外系及锥体系体征。     

内蒙古发展碳金融影响因素分析

自《京都议定书》2005年生效以来,碳金融市场获得了飞速发展。概述国内外碳金融市场发展现状,着重分析内蒙古地区发展碳金融市场现有的优势、前景及存在的主要困难、不利条件及影响因素。并对如何进一步推进内蒙古碳金融交易发展提出了相关对策建议。     

炼铝用碳阳极中三氟化铝作用机理的量子化学研究

本文采用ＣＮＤＯ／２方法研究了炼铝用碳阳极中添加三氟化铝的吸附行为，通过优化得到了吸附的最佳模型，量子化学计算结果表明；三氟化铝添加到炼铝用碳阳极中起传输电子的电桥作用，是碳阳极发生空气氧化以及铝电解时生成氧气的氧化反应的抑制剂，理论计算与实验结果吻合较好。     

DNA的荧光分析--DNA对吖啶橙(AO)-中性红(NR)能量转移影响的研究

介绍了近几年荧光能量转移体系用于DNA分析测定方法的进展 .通过实验对吖啶橙 (AO)_中性红 (NR)荧光体系能量转移进行分析 ,说明使用该体系可用于对DNA定量测定 .然后通过Forster能量转移理论 ,计算DNA加入前后AO_NR体系临界距离变化 ,从某种程度上说明DNA对AO_NR荧光淬灭的影响 .     

气化法测定四氯化碳分子量实验的改进

讨论了影响气化法测定四氯化碳分子量实验误差的因素，对文献[1]中报道的方法进行了改进．学生按改进的方法进行实验，测定的四氯化碳分子量在150～155范围内．     

单壁碳纳米管的光化学活性研究

本文采用间歇式超声法制得能够在水体中稳定分散的单壁碳纳米管,考察了单壁碳纳米管在模拟太阳光照下产生活性氧的能力.分别以呋喃醇和对氯苯甲酸为探针,发现在模拟太阳光下单壁碳纳米管能够产生单线态氧和羟基自由基,其产生单线态氧的能力与自身浓度成正比,是相同浓度SRFA的1/9~1/5,单壁碳纳米管产生羟基自由基的能力与自身浓度成反比,是相同浓度SRFA的2/5~1/2.     

分层钻削提高碳纤维复合材料钻孔表面质量的研究*

碳纤维复合材料在钻削加工时易产生毛刺、撕裂、分层等缺陷,是典型的难加工材料。针对碳纤维复合材料特点,提出分层钻削加工的方案,通过增加切削刃长度,降低切削力,保证刃口锋利性来减少碳纤维复合材料的加工缺陷。选用均为TiAlCrN/TiSiN涂层的普通麻花钻头与分层钻削钻头进行碳纤维复合材料孔加工对比试验,结果表明：分层钻削碳纤维复合材料时钻削轴向力较小,钻孔表面质量较好,刀具耐用度更高,适合碳纤维复合材料的钻削加工。