H.Q. Rong
金属学报(英文版)
Porous structure and surface chemistry of activated carbon fibers obtained by differ-ent precursors and activation methods were investigated. Adsorption isotherms werecharacterized by nitrogen adsorption at 77K over a relative pressure range from 10 6to 1. The regularization method according to Density Functional Theory (DFT) wasemployed to calculate the pore size distribution in the samples. Their specific surfaceareas were calculated by BET method, micropore volume and microporous specificsurface area calculated by t-plot method and MPD by Horvath-Kawazoe equation. Mi-cropore volume of rayon-based ACF was higher than that of other samples. The staticand dynamic adsorption capacity for formaldehyde on different ACFs was determined.The results show that steam activated Rayon-based A CFs had higher adsorption capac-ity than that of steam and KOH activated PAN-A CFs. Breakthrough curves illustratedthat Rayon-ACFs had longer breakthrough time, thus they possessed higher adsorp-tion capacity for formaldehyde than that of PAN-ACFs. The entire sample had smalladsorption capacity and short breakthrough time for water. Rayon-A CFs had exccl-lent adsorption selectivity for formaldehyde than PAN-ACFs. And the samples withhigh surface areas had relatively high adsorption capacity for formaldehyde. Elementaicontent of different A CFs were performed. Rayon-based A CFs contained more oxygenthan PAN-ACFs, which may be attributed to their excellent adsorption capacity forformaldehyde.
关键词:
activated carbon fiber
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null
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null
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null
Z.Y. Ryu
金属学报(英文版)
Polyacrylonitrile (PAN)-based activated carbon fibers (A CFs) are amorphous graphiticcarbon, consisting of sp2 hexagonal carbon layers with different sizes of pores rangingfrom micropores to macropores. The microstructure, including graphite-like micro-crystal, surface chemistry, pore size distributions and so on, of PAN activated carbonfibers prepared by different activation methods were investigated by element onalysis(EA ), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and infraredspectra. The XRD patterns show that PAN-ACFs activated by different methods areof amorphous diffraction characteristic but composed of very small graphitic crystal-lites. The surface functional groups were analyzed by XPS and FT-IR spectra. Thesamples activated by air possess relatively abundant oxygen functional groups, and thesamples activated by potassium hydroxide possess less oxygen functional groups. Thisis attributed to the different activation mechanisms.
关键词:
activated carbon fiber
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null
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null
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null
侯亚芹
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黄张根
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马建蓉
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郭士杰
催化学报
将V_2O_5担载在活性炭纤维(ACF)上制得V_2O_5/ACF催化剂,并采用暂态响应实验和NH_3吸附氧化实验等考察了影响V_2O_5/ACF催化剂上选择性催化还原(SCR)反应的关键因素.结果表明,NH_3在催化剂表面的吸附是必要的,而且该吸附是一个快速过程;气相O_2的存在有利于形成催化剂中所需的活性氧化态物种.NH_3吸附.脱附与原位质谱相结合的实验表明,V_2O_5/ACF催化剂具有吸附NH_3和将NH_3氧化为N_2H_2的能力,N_2H_2为NH_3氧化的一种中间体.
关键词:
五氧化二钒
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活性炭纤维
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选择性催化还原
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氨
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吸附
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活化
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机理
陈占营
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王旭辉
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王亚龙
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张海涛
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谢金川
无机材料学报
研究了活性炭纤维(ACF)前处理及再生前后动态吸附氙的性能差异, 重点研究了温度对氙脱附行为的影响. 结果表明, 前处理对活性炭纤维动态
吸附氙的性能有较大影响, 而再生处理对吸附?性能的影响不大. 高温加热氙的脱附效率>97%, 但存在150℃的温度阈值, 且在150℃以上, 温度
的变化对氙的脱附没有影响.
关键词:
活性炭纤维
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xenon
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dynamic adsorption
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desorption
曾汉民
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陆耘
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朱世平
材料研究学报
研究了以天然纤维制备新型的活性碳纤维(SACF)的制备条件以及SACF 对水溶液中金属离子的吸附性能。实验结果表明,活化反应条件如反应温度、时间、活化剂流速等对SACF 的比表面积有较大的影响。SACF 对水溶液中的La~(+++),Cu~(++),Co~(++),Ni~(++),Cd~(++),Pb~(++)等离子基本上不吸附,而对贵金属Au~(+++)具有吸附率高、吸附选择性好、吸附速度快、吸附量大等优异性能。
关键词:
SACF
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specific surface area
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adsorbent
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precious metal ions
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null
姚玉元
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盛凤翔
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吴熊平
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吕汪洋
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陈文兴
功能材料
将四（2,4-二氯-1,3,5-三嗪基）氨基钴酞菁以共价键形式键合在活性碳纤维（ACF）载体上,制得了活性碳纤维负载钴酞菁催化剂（ACF-CoPc）,采用热重分析、原子吸收光谱和氮气等温吸附法对其进行了表征。原子吸收光谱测得金属酞菁的负载量为5.26μmol/g。氮气等温吸附法测得ACF-CoPc的比表面积为1235.9m2/g,孔径分布以2nm左右的小孔为主。以2-巯基乙醇为催化对象,采用超高效液相色谱研究了ACF-CoPc的催化氧化性能。结果表明ACF-CoPc对2-巯基乙醇具有很好的催化氧化性能,反应4h时对2-巯基乙醇的去除率高达100%,氧化产物为2,2’-二硫二乙醇。而且催化剂ACF-CoPc经6次循环使用后,对2-巯基乙醇的去除率没有持续下降,这表明该催化剂具有良好的重复使用性。
关键词:
催化氧化
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钴酞菁
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活性碳纤维
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2-巯基乙醇
杨青山
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肖新颜
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万彩霞
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徐立宏
材料导报
活性炭(AC)及活性炭纤维(ACF)作为光催化剂载体具有较高的比表面积和较强的吸附性能,可以有效提高负载型光催化剂TiO2/AC和TiO2/ACF对有机污染物的光催化降解效率.首先介绍了TiO2光催化剂的结构特性以及各种掺杂改性方法,对负载型TiO2/AC及TiO2/ACF光催化剂的各种制备方法进行了详细评述.在此基础上,讨论了影响有机污染物光催化降解性能的重要因素,指出了负载型TiO2光催化材料研究中有待解决的问题和发展方向.
关键词:
二氧化钛
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活性炭
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活性炭纤维
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光催化材料
李海红
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杨洁
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李红艳
材料科学与工程学报
doi:10.14136/j.cnki.issn 1673-2812.2015.05.020
采用活性炭纤维(ACF)毡作为原材料,对比评价在煮沸、振荡、超声三种条件下的HCl预处理对其结构及电化学性能的影响.通过BET、SEM、FTIR研究ACF结构的变化,并以灰分和碘值考察ACF的吸附性能以及采用CV曲线分析ACF电极材料的电化学性能变化.结果表明,除HCl超声外,其他预处理都使活性炭纤维的形状和尺寸变得相对规整;经HCl煮沸和HCl振荡处理后的ACF比表面积分别增大34.87％和32.73％,其碘吸附值分别增大41.8％和42.1％,HCl振荡的比电容最高可达62F/g;而HCl超声处理却造成ACF表面刻蚀,其碘值和比表面积均较原样降低.综合比较各种方法的预处理效果如下:HCl振荡>HCl煮沸>HCl超声;HCl振荡处理效果最好,且使ACF表面酸性含氧基团增多,更有利于对无机盐离子的吸附.
关键词:
活性炭纤维
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盐酸预处理
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微观结构
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电化学性能
