【摘 要】
：
以硝酸镍为催化剂前驱体,C2H2为碳源,H2为还原气,N2为载气,采用化学气相沉积法(CVD)在活性炭纤维(ACFs)毡体的纤维表面催化生长碳纳米管(CNTs),制备ACF/CNT复合材料.经测定,
【机 构】
：
中南大学资源加工与生物工程学院,长沙学院生物工程与环境科学系,中南大学粉末冶金国家重点实验室
论文部分内容阅读
以硝酸镍为催化剂前驱体,C2H2为碳源,H2为还原气,N2为载气,采用化学气相沉积法(CVD)在活性炭纤维(ACFs)毡体的纤维表面催化生长碳纳米管(CNTs),制备ACF/CNT复合材料.经测定,所制复合材料比表面积可达62.56 m2/g:扫描电镜分析表明,CNTs在ACFs表面分布均匀而致密,经过表面修饰可以作为1种良好的吸附材料.选择低浓度的六价铬(Cr(VI))溶液进行吸附研究,考察振荡时间、溶液pH值以及溶液的初始浓度等因素对吸附行为的影响.实验结果表明,初始Cr(VI)浓度为1mg/L,在25℃时,随着振荡时间的增长溶液中Cr(VI)的脱除率逐渐增加,在150 min时达到最大值49.48%.溶液中Cr(VI)的脱除率随着pH的减小而增大,当pH值为2.0时脱除率达91.50%,对Cr(VI)的吸附量随着溶液初始浓度的增加而增大,但是当初始浓度到达5.0 mg/L时,脱除效率到达最大值后开始降低.并对ACF/CNT复合材料的吸附机制进行了探讨.
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