Facile synthesis of porous carbon nitride spheres with hierarchical three-dimensional mesostructures for CO2 capture

By Qiang Li, Jianping Yang, Dan Feng, Zhangxiong Wu, Qingling Wu, S. Park, Chang-Sik Ha, Dongyuan Zhao. 2010

349 citations recorded by the source corpus.

Porous carbon nitride (CN) spheres with partially crystalline frameworks have been successfully synthesized via a nanocasting approach by using spherical mesoporous cellular silica foams (MCFs) as a hard template, and ethylenediamine and carbon tetrachloride as precursors. The resulting spherical CN materials have uniform diameters of ca. 4 μm, hierarchical three-dimensional (3-D) mesostructures with small and large mesopores with pore diameters centered at ca. 4.0 and 43 nm, respectively, a relatively high BET surface area of ∼550 m2/g, and a pore volume of 0.90 cm3/g. High-resolution transmission electron microscope (HRTEM) images, wide-angle X-ray diffraction (XRD) patterns, and Raman spectra demonstrate that the porous CN material has a partly graphitized structure. In addition, elemental analyses, X-ray photoelectron spectra (XPS), Fourier transform infrared spectra (FT-IR), and CO2 temperature-programmed desorption (CO2-TPD) show that the material has a high nitrogen content (17.8 wt%) with nitrogen-containing groups and abundant basic sites. The hierarchical porous CN spheres have excellent CO2 capture properties with a capacity of 2.90 mmol/g at 25 °C and 0.97 mmol/g at 75 °C, superior to those of the pure carbon materials with analogous mesostructures. This can be mainly attributed to the abundant nitrogen-containing basic groups, hierarchical mesostructure, relatively high BET surface area and stable framework. Furthermore, the presence of a large number of micropores and small mesopores also enhance the CO2 capture performance, owing to the capillary condensation effect.

Subfields: Inorganic Chemistry, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/f05625875741f29c91f469ba734cd4a32598c21b

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In Materials Chemistry

1. Jianlin Shi
2. Z. Yuan
3. S. Guan
4. Xiangqian Fan
5. Lingxia Zhang

In Renewable Energy, Sustainability and the Environment

1. Z. Yuan
2. Jianlin Shi
3. Xiangqian Fan
4. Lingxia Zhang

Citations in the corpus

• Chitosan derived nitrogen-doped microporous carbons for high performance CO2 capture (2013, background): “It is clear that CO2 adsorption capacity of AC-2–635 is lower at higher temperature, as also reported in literatures [11,26].”
• Nitrogen-doped porous carbons through KOH activation with superior performance in supercapacitors (2014, background): “[31] Li Q, Yang J, Feng D, Wu Z, Wu Q, Park SS, et al.”