發(fā)布時(shí)間：2018-03-10 01:08

  本文選題：水熱碳化法　切入點(diǎn)：葡萄糖　出處：《硅酸鹽學(xué)報(bào)》2017年12期 　論文類型：期刊論文

【摘要】：以葡萄糖為碳源、聚丙烯酸鈉為分散劑、硝酸鎳為催化劑的前驅(qū)體,采用水熱碳化法一步制備了負(fù)載有Ni O催化劑的碳微球,再在氬氣氣氛下催化熱處理制備了平均粒徑約2μm的石墨化程度高、球形度及分散性好的石墨微球。研究了催化劑用量、熱處理溫度以及保溫時(shí)間對(duì)合成石墨微球的影響。結(jié)果表明:當(dāng)催化劑Ni的加入量為1.5%(質(zhì)量分?jǐn)?shù))、熱處理溫度為1 200℃、保溫時(shí)間為3 h時(shí),所得石墨微球的石墨化程度最高。繼續(xù)升高熱處理溫度或延長(zhǎng)保溫時(shí)間,石墨微球的石墨化程度反而降低,其原因可能是過(guò)高的溫度或者過(guò)長(zhǎng)的保溫時(shí)間導(dǎo)致了催化劑的團(tuán)聚及失活。碳微球的催化石墨化過(guò)程由溶解 析出機(jī)理決定。此外,石墨微球具有與鱗片石墨幾乎相當(dāng)?shù)目寡趸阅?且遠(yuǎn)高于碳微球。
[Abstract]:Carbon microspheres supported on Ni O catalyst were prepared by hydrothermal carbonization with glucose as carbon source, sodium polyacrylate as dispersant and nickel nitrate as catalyst precursor. Graphite microspheres with high graphitization degree, good sphericity and good dispersion were prepared by catalytic heat treatment in argon atmosphere. The amount of catalyst was studied. The effects of heat treatment temperature and holding time on the synthesis of graphite microspheres were studied. The results showed that when the amount of Ni catalyst was 1.5 kum (mass fraction = 1 200 鈩，

本文編號(hào)：1591074