發(fā)布時(shí)間：2018-04-13 11:32

  本文選題：蝶翅 + 多級(jí)孔碳　； 參考：《西南科技大學(xué)》2015年碩士論文

【摘要】：本文以藍(lán)閃蝶蝶翅為碳源通過熱解法制備了具有蝶翅結(jié)構(gòu)的多級(jí)孔碳材料,同時(shí)采用水熱法制備了CW-Co3O4納米粒子(C W-C o 3 O 4 N P s)和C W-C o 3 O 4納米陣列(C W-C o 3 O 4 N R A s)復(fù)合材料。探究了CW-Co3O4NPs作為納米結(jié)構(gòu)催化劑對(duì)高氯酸銨(AP)熱分解的催化性能以及碳化蝶翅和CW-Co3O4NRAs的電化學(xué)性能。主要研究?jī)?nèi)容如下:(1)以藍(lán)閃蝶蝶翅為碳源,制備了具有蝶翅結(jié)構(gòu)的多級(jí)孔碳材料,該材料由碳化層和空氣層交替堆砌而成,存在空心脊?fàn)罱Y(jié)構(gòu)和橫肋結(jié)構(gòu)。該材料具有大孔-介孔-微孔的多級(jí)孔結(jié)構(gòu),其中大孔約為2 5.0%,介孔約為6 0.0%,微孔約為1 5.0%。多級(jí)孔碳為氮摻雜材料,其氮含量約為4.2%,氮源來自于原始蝶翅中蛋白質(zhì)和幾丁質(zhì),碳化過程中不需要外加氮源。(2)以碳化蝶翅為載體,利用水熱法制備了CW-Co3O4NRAs復(fù)合材料,通過XRD、Raman、FTIR、TG-DSC、XPS、FESEM、TEM以及低溫氮吸附-脫附等表征,表明CW-Co3O4NRAs中含有碳、氮、氧、鈷四種元素,二價(jià)鈷離子通過碳骨架上的氮和氧原子與碳材料復(fù)合在一起,Co3O4的負(fù)載量約為67.0%。復(fù)合材料具有三維有序周期性結(jié)構(gòu)和大孔-介孔-微孔的多級(jí)孔結(jié)構(gòu)。通過循環(huán)伏安曲線、恒電流充放電曲線和交流阻抗譜分析,CW-Co3O4NRAs在1 A?g-1電流密度比電容為941 F?g-1,能量密度為99.11 Wh?kg-1,同時(shí)材料具有良好的循環(huán)穩(wěn)定性,在2000次循環(huán)充放電后電容保持率約在95%以上。(3)以碳化蝶翅為載體,利用水熱法制備了CW-Co3O4NPs復(fù)合材料,通過XRD、FESEM、TEM和XPS等表征,結(jié)果表明CW-Co3O4NPs中Co3O4納米粒子成功的在碳材料表面并且沒有團(tuán)聚現(xiàn)象,其中四氧化三鈷的負(fù)載量約為70.0%。CW-Co3O4NPs對(duì)AP的熱分解表現(xiàn)出了良好的催化作用,當(dāng)復(fù)合催化劑的添加量為3%時(shí),使得高氯酸銨的低溫?zé)岱纸膺^程消失,高溫?zé)岱纸夥逄崆暗搅?93℃,較純AP高溫?zé)岱纸夥逄崆傲?47℃,AP的熱分解放熱量為369.3 k J?mol-1,較純A P熱分解放熱量增加了約2 0 0 k J?m o l-1。
[Abstract]:In this paper, a multiporous carbon material with the structure of the butterfly fin was prepared by pyrolysis with the blue flake butterfly fin as the carbon source.At the same time, CW-Co3O4 nano-particle C W-C o 3O 4 N P s and C W C o 3 O 4 N R S) composites were prepared by hydrothermal method.The catalytic properties of CW-Co3O4NPs as a nanostructure catalyst for the thermal decomposition of ammonium perchlorate (APP) and the electrochemical properties of carbonated butterfly wings and CW-Co3O4NRAs were investigated.The main contents of this study are as follows: (1) A multilevel porous carbon material with butterfly wing structure was prepared with blue diorite butterfly fin as carbon source. The material is composed of carbonized layer and air layer alternately stacked with hollow ridge structure and transverse rib structure.The material has a multilevel pore structure of macroporous, mesoporous and microporous, in which the macropore is about 25.0, the mesopore is about 60. 0 and the micropore is about 15.0.The nitrogen content of multilevel porous carbon was about 4.2. The nitrogen source came from protein and chitin in the original butterfly wings. During carbonization, the CW-Co3O4NRAs composites were prepared by hydrothermal method without the need of additional nitrogen source.The composite has three dimensional ordered periodic structure and multilevel pore structure of macroporous mesoporous microporous.The cyclic voltammetry, constant current charge-discharge curves and AC impedance spectra were used to analyze CW-Co _ 3O _ 4NRAs with a current density specific capacitance of 941F / g ~ (-1) and an energy density of 99.11 / kg ~ (-1) at 1 A?g-1.After 2000 cycles, the capacitance retention rate was over 95%. The CW-Co3O4NPs composite was prepared by hydrothermal method on the carrier of carbonated butterfly wings. The composites were characterized by TEM and XPS.The results showed that the Co3O4 nanoparticles in CW-Co3O4NPs were successfully on the surface of carbon materials and had no agglomeration. The loading amount of Cobalt tetroxide was about the same as that of 70.0%.CW-Co3O4NPs, which showed a good catalytic effect on the thermal decomposition of AP.The process of thermal decomposition of ammonium perchlorate at low temperature disappeared, and the peak of thermal decomposition of ammonium perchlorate was advanced to 293 鈩，

本文編號(hào)：1744303