Ordered Mesoporous Silica Pyrolyzed from Single-Source Self-Assembled Organic–Inorganic Giant Surfactants
Qing‐Yun Guo, Xiaoyun Yan, Wei Zhang, Xinghan Li, Yongsheng Xu, Shuqi Dai, Yuchu Liu, Boxing Zhang, Xueyan Feng, Jia‐Fu Yin, Di Han, Jiahao Huang, Zebin Su, Tong Liu, Mingjun Huang, Chih‐Hao Hsu, Stephen Z. D. Cheng
Abstract
We report the preparation of hexagonal mesoporous silica from single-source giant surfactants constructed via dihydroxyl-functionlized polyhedral oligomeric silsesquioxane (DPOSS) heads and a polystyrene (PS) tail. After thermal annealing, the obtained well-ordered hexagonal hybrid was pyrolyzed to afford well-ordered mesoporous silica. A high porosity (e.g., 581 m2/g) and a uniform and narrow pore size distribution (e.g., 3.3 nm) were achieved. Mesoporous silica in diverse shapes and morphologies were achieved by processing the precursor. When the PS tail length was increased, the pore size expanded accordingly. Moreover, such pyrolyzed, ordered mesoporous silica can help to increase both efficiency and stability of nanocatalysts.