本文選題：維管束植物 + 碳納米管��； 參考：《渤海大學》2015年碩士論文

【摘要】：本文以維管束植物為碳源分別制備碳納米管、石墨烯和碳納米球。探討了制備三種碳納米材料的形成機理,并研究三種碳納米材料對羅丹明B和重金屬離子(Cu2+和Zn2+)的吸附情況。結(jié)果如下:1、以楊樹落葉為碳源通過水熱法制備的碳納米管聚合成狼牙棒狀,長度約400 nm-1000 nm,向外一端較細,少量呈開口狀。碳納米管結(jié)晶度高但管壁上存在缺陷。2、以紫丁香落葉為碳源經(jīng)酸化后氧氣輔助多次熱解制備多層石墨烯,表面有一定的缺陷。3、以柳樹落葉為碳源在氧氣輔助下多次熱解制備碳納米球,結(jié)果表明制得的碳納米球為直徑約100 nm的實心球。具有良好的結(jié)晶性。4、分別用三種制得的碳納米材料對羅丹明B、Cu2+和Zn2+進行吸附,發(fā)現(xiàn)碳納米管對羅丹明B、Cu2+和Zn2+的吸附平衡時間分別為4 h、1 h和2.5 h。石墨烯對羅丹明B、Cu2+和Zn2+的吸附平衡時間分別9 h、2 h和3.5 h。碳納米球?qū)α_丹明B、Cu2+和Zn2+的吸附平衡時間分別5 h、0.5 h和2 h。在相同初始濃度和投加量下,三種碳納米材料對羅丹明B吸附能力由強到弱依次為石墨烯碳納米球碳納米管。對Cu2+的吸附能力由強到弱依次為碳納米球碳納米管石墨烯。對Zn2+的吸附能力由強到弱依次為石墨烯碳納米管碳納米球。5、三種碳納米材料對羅丹明B、Cu2+和Zn2+的吸附量均隨著吸附質(zhì)初始濃度的增加而增大,隨著吸附劑的投加量增大而減小。吸附羅丹明B時,吸附量均隨pH增加而減小,而對Cu2+和Zn2+的吸附量隨pH的增大而增大。6、所有的吸附均符合準二級動力學方程,Freundiich模型比Langmuir更有利于描述吸附過程。
[Abstract]:In this paper, carbon nanotubes, graphene and carbon nanospheres were prepared by using vascular bundle plants as carbon source. The formation mechanism of three kinds of carbon nanomaterials was discussed, and the adsorption of Rhodamine B and heavy metal ions (Cu2 and Zn2) on the three carbon nanomaterials was studied. The results are as follows: 1. The carbon nanotubes prepared by hydrothermal method with poplar deciduous leaves as carbon source are polymerized to the shape of a wolf tooth rod, the length is about 400 nm-1000 / nm.The outer end is thin and a small amount of carbon nanotubes are open. Carbon nanotubes (CNTs) have high crystallinity but defects on the wall. The multilayer graphene was prepared by oxygen assisted pyrolysis with eugenol leaves as carbon source. The carbon nanospheres were prepared by pyrolysis of willow leaves as carbon source with the aid of oxygen. The results showed that the carbon nanospheres were solid spheres with a diameter of about 100 nm. It was found that the adsorption equilibrium time of Rhodamine Bu Cu2 and Zn2 for Rhodamine Bu Cu2 and Zn2 were 4 h and 2.5 h, respectively. The adsorption equilibrium time of graphene for Rhodamine Bu Cu 2 and Zn2 was 9 h / 2 h and 3.5 h, respectively. The adsorption equilibrium time of Rhodamine Bu Cu2 and Zn2 was 0.5 h and 2 h, respectively. At the same initial concentration and dosage, the adsorption ability of the three carbon nanomaterials to Rhodamine B was in the order of graphene carbon nanotubes from strong to weak. The adsorption ability of Cu2 from strong to weak is carbon nanospheroidal carbon nanotube graphene. The adsorption capacity of Zn2 from strong to weak is graphene carbon nanotube carbon nanospheres. The adsorption capacity of three kinds of carbon nanomaterials to Rhodamine Bu Cu2 and Zn2 increase with the increase of the initial concentration of adsorbent and decrease with the addition of adsorbent. When Rhodamine B was adsorbed, the adsorption capacity decreased with the increase of pH, while the adsorption capacity of Cu2 and Zn2 increased with the increase of pH. All the adsorptions were in accordance with the quasi second-order kinetic equation. Freundiich model was better than Langmuir in describing the adsorption process.
【學位授予單位】：渤海大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ127.11;TB383.1

【參考文獻】

相關(guān)期刊論文 前1條

1 周慶祥;肖軍平;汪衛(wèi)東;周建國;;碳納米管應用研究進展[J];化工進展;2006年07期

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本文編號：1828819