利用废弃菜籽油制备炭黑-基于气溶胶气相化学沉积法

利用气溶胶化学气相沉积的方式转化废弃菜籽油制备炭黑。以氮气为载气，将液体废油预先转化成气溶胶颗粒输送至高温管式炉，在 800 ℃ 的条件下进行热分解，形成基于废油的炭黑。产物的形貌、组分和结构采用光学显微镜，拉曼光谱， SEM 和 XPS 等方式进行表征。结果显示，炭黑表面呈阶梯片状叠加结构，而拉曼谱上出现强烈的 D 峰、G 峰及 G' 峰（其中 ID/IG=1.09 ）。根据能谱 C1S 峰显示，炭黑表面化学键主要由 sp2 CC，sp3 C—C，C—OH 和 OC—O— 组成，其中 sp2 占据 88.5%。对比分析原始单晶硅基和负载炭黑表面的润湿性，显示负载炭黑后的硅表面疏水性大幅度提高，与水的接触角从 66.4°增长到 141°，呈现超级疏水性；而油在硅基和炭黑表面的接触角分别为 21.2°和<4°。

Production of waste rapeseed oil derived-carbon by aerosol chemical vapor deposition

In the present work, waste rapeseed oil was converted into carbon black by using aerosol chemical vapor deposition (A-CVD).The liquid waste oil was prepared in the form of aerosol particles and transported by N2 carrier gas into a furnace.After thermal decomposition at a temperature of 800℃, waste-oil-based carbon black was formed and deposited.The morphology, composition, and structure of the products were characterized by optical spectroscopy, Raman spectroscopy, SEM, and XPS.Analysis indicated that the stacked cascade-structure of carbon was produced, while intense D, G, and G' peaks were observed on the Raman spectra with an intensity ratio (ID/IG) of 1.09.Due to the deconvolution of the C1 s peak, the surface chemical bonding of carbon contributed mainly to sp2 CC, sp3 C-C, C-OH, and OC-O-, with the dominant ratio of sp2 CC occupying 88.5%.According to comparative analysis of the wettability of primitive silicon and carbon deposited silicon, the contact angles of water droplets on the surface increased dramatically from 66.4° to 141°, exhibiting a super-hydrophobicity, while the contact angles of oil droplets on the silicon and carbon were 21.2° and less than 4°, respectively.