New Polymer Colloidal and Carbon Nanospheres: Stabilizing Ultrasmall Metal Nanoparticles for Solvent-Free Catalysis

Tao Wang, Pengfei Zhang, Yan Sun, Bing Liu, Yunling Liu, Zhen An Qiao, Qisheng Huo, Sheng Dai

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Herein, we report the synthesis of new colloidal polydiaminopyridine (PDAP) nanospheres with uniform particle size tuned from 76 to 331 nm. The polymer colloidal nanospheres and thin films assembled by the nanospheres exhibit amphiphilic or superhydrophilic properties, originated from the different polymer surfactants. In addition, the polymer nanospheres can be easily carbonized into microporous carbon nanospheres with high N content up to 24 wt %, thus enabling a preferred basicity for CO2 adsorption. As-synthesized PDAP show good compatibility that can not only encapsulate typical nanoparticles to form core-shell composite nanospheres but also stabilize noble metal ions to obtain ultrasmall metal nanoparticles (e.g., Pd and Au) during the thermal reduction process by the nitrogen sites from sphere frameworks. The nanocomplex Pd/PDAP-500 shows exceptional activity and high selectivity in the solvent-free oxidation of alcohols with O2.

Original languageEnglish
Pages (from-to)4044-4051
Number of pages8
JournalChemistry of Materials
Volume29
Issue number9
DOIs
StatePublished - May 9 2017

Funding

This work was supported by the Young Thousand Talented Program and the National Natural Science Foundation of China (Grant Nos. 21671073 21671074, 21371067, 21621001, and 21373095).

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