There is currently a significant research effort to develop alternative energy carriers such as hydrogen and natural gas. [1] Many materials have been investigated for physisorptive hydrogen storage including carbons, zeolites, metal-organic frameworks (MOFs) and, recently, porous organic polymers. [2][3][4][5][6][7] We have demonstrated that microporous organic polymers synthesized by using Friedel-Crafts chemistry [2,3]

that are important indicators for use in photonics, biomedicine, catalysis, and advanced electrodes. [4] Current achievements related to porous carbon spheres mostly center on nanometer-sized spheres. [5] However, micrometer-sized spheres with refined hierarchical interior structures are highly desirable, because such structures not only enable spatiotemporal control of the chemical process occurring inside the spheres, but also reduce the difficulty of product separation compared with nanometersized spheres. [6] In particular, hierarchical porous carbon microspheres with large inner cavities, refined pore structure, and diverse functional groups are ideal hosts to anchor active guests through both physical and chemical interactions. [7] However, the fabrication of hierarchical porous carbon microspheres with such a refined structure is much more challenging than fabricating traditional carbon nanospheres, because it is extremely difficult to achieve the necessary delicate control of the interior structure and outer shell across the microscale to nanoscale.Although emulsion, spraying, dripping, and aerosol-assisted self-assembly methods have been explored to fabricate carbon microspheres, [6a,8] these microspheres do not possess complex interior structures because of the limitations of those methods in diversifying the assembly. [5] Solution synthetic methods have been widely applied for controllable fabrication of porous nanospheres. [9] It is nontrivial to extend solution synthetic methods to the fabrication of hierarchical porous carbon microspheres. Lu and co-workers reported a surface free energy-induced assembly approach to synthesize multicavity carbon nanospheres about 100 nm in diameter; this was the first direct synthesis of multicavity-structured carbon nanospheres by a controllable solution synthetic method. [7b] Yang and co-workers subsequently reported the synthesis of interiorstructured mesoporous carbon microspheres (50-200 µm in diameter) based on surfactant assembly within water droplet confined spaces. [5] To our knowledge, carbon microspheres of size ranging from sub-micrometer to a few micrometers with a refined hierarchical structure, based on a solution synthetic method, have not been reported. Moreover, the carbon precursors used by Lu and co-workers were both traditional phenolic resol; [5,7b] and the resultant carbons with homogeneousThe construction of refined architectures plays a crucial role in performance improvement and application expansion of advanced materials. The synthesis of carbon microspheres with a refined hierarchical structure is still a problem in synthetic methodology, because it is difficult to achieve the necessary delicate control of the interior structure and outer shell across the microscale to nanoscale. Nitrogen-doped multichamber carbon (MCC) microspheres with a refined hierarchical structure are realized here via a surfactant-directed spaceconfined polymerization strategy. The MCC precursor is not the traditional phenolic resol but a new kind of 2,6-di...

A series of porous carbons for CO2 capture were developed by simple carbonization and KOH activation of coconut shells under very mild conditions. Different techniques such as nitrogen sorption, X-ray diffraction, scanning emission microscopy, and transmission electron microscopy were used to characterize these sorbents. Owing to the high amount of narrow micropores within the carbon framework, the porous carbon prepared at a KOH/precursor ratio of 3 and 600 °C exhibits an enhanced CO2 adsorption capacity of 4.23 and 6.04 mmol/g at 25 and 0 °C under 1 bar, respectively. In addition to the high CO2 uptake, these samples also show fast adsorption kinetics, moderate heat of adsorption, high CO2 over N2 selectivity, excellent recyclability and stability, and superior dynamic CO2 capture capacity. The application of coconut shell as precursors for porous carbons provides a cost-effective way for the development of better adsorbents for CO2 capture.

Solvent-free synthetic method was employed for the construction of mesoporous α-MnO2 nanosheets. Benefited from solid interface reaction, the obtained MnO2 nanosheets with large oxygen vacancy exhibit high surface area of up to 339 m 2 /g and mesopore size of 4 nm. The MnO2 nanosheets as a catalyst were applied in NH3-assited selective catalytic reduction (NH3-SCR) of DeNOx at relatively low temperature range. The conversion efficiency could reach 100% under gas hourly space velocity (GHSV) of 700,000 h -1 at 100 o C. To gain insight into the mechanism about NH3-SCR of nitric oxide on the MnO2 nanosheets, temperature-programmed desorption of NH3, density function theory study and in situ diffuse reflectance infrared Fourier transform spectra were carried out, revealing the cooperative effect of catalytic sites on the reduction of nitric oxide.This work provides a strategy for facile preparation of porous catalysts in low-temperature DeNOx.

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