Direct triblock-copolymer-templating synthesis of ordered nitrogen-containing mesoporous polymers.
Ordered nitrogen-containing mesoporous carbonaceous polymers have been synthesized via a direct triblock-copolymer-templating process by using soluble, low-molecular-weight urea-phenol-formaldehyde (UPF) resin as an organic precursor and amphiphilic triblock copolymer Pluronic F127 as a template. Characterization using small-angle X-ray scattering (SAXS), N(2) sorption, transmission electron microscopy (TEM), elemental analysis, thermogravimetric analysis (TG), Fourier transform infrared (FTIR), and water adsorption techniques reveals that the obtained nitrogen-containing mesoporous polymers possess ordered structures, high surface areas (385-420 m(2)/g), large pore sizes (3.1-3.6nm) and pore volumes (0.25-0.44cm(3)/g), and high nitrogen content (2.69-2.94%). Various mesostructures, such as two-dimensional (2-D) hexagonal (space group, p6mm) and 3-D body-centered cubic (Im3 m) symmetries, can be obtained by simply adjusting the mass ratio of UPF/F127. The content of nitrogen in the mesoporous polymers can also be easy varied by changing the amount of urea and the reaction time of UPF resin precursors. Compared with the nitrogen-free mesoporous polymer, the obtained mesoporous carbonaceous polymers show a more hydrophilic nature and thus evidently higher water adsorption capacity. The presence of nitrogen groups can also significantly improve the adsorption performance of Fe(III) ions.
Yang
Jianping
J
Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Key Laboratory of Molecular Engineering of Polymers of the Chinese Ministry of Education, Fudan University, Shanghai 200433, People's Republic of China.
Zhai
Yunpu
Y
Deng
Yonghui
Y
Gu
Dong
D
Li
Qiang
Q
Wu
Qingling
Q
Huang
Yan
Y
Tu
Bo
B
Zhao
Dongyuan
D
D000327:Adsorption; D002412:Cations / Q000737:chemistry / Q000302:isolation & purification; D005557:Formaldehyde / Q000737:chemistry; D007501:Iron / Q000737:chemistry / Q000302:isolation & purification; D009584:Nitrogen / Q000737:chemistry*; D019800:Phenol / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D012117:Resins, Synthetic / Q000737:chemistry*; D014508:Urea / Q000737:chemistry; D014867:Water / Q000737:chemistry
D002412:Cations; D011108:Polymers; D012117:Resins, Synthetic; D014867:Water; D005557:Formaldehyde; D019800:Phenol; D014508:Urea; D007501:Iron; D009584:Nitrogen