Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 256, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.117854
Keywords
g-C3N4 nanotubes; Photocatalytic CO2 reduction; Supramolecular self-assembly; Nitrogen-rich
Funding
- National Nature Science Foundation of China - Priority Academic Program Development of Jiangsu Higher Education Institutions, High-tech Research Key laboratory of Zhenjiang [21676128, 21776118, 552018002]
- high performance computing platform of Jiangsu University
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The conversion of carbon dioxide (CO2) into fuels and valuable chemicals using solar energy is a promising method for reducing CO2 emissions and solving energy supply issues. However, the development of inexpensive, efficient and metal-free materials for photocatalytic CO2 reduction is challenging. Herein, we report a facile supramolecular self-assembly strategy for the preparation of porous nitrogen-rich graphitic carbon nitride (g-C3N4) nanotubes with Lewis basicity and a large surface area, which are beneficial for the adsorption of CO2 and, consequently, the enhancement of the photocatalytic CO2 reduction activity. The metal-free porous nitrogen-rich g-C3N4 nanotubes catalyst exhibits a superior visible-light-induced CO2-to-CO conversion rate of 103.6 mu mol g(-1) h(-1), which is 17 and 15 times higher than those of bulk g-C3N4 (6.1 mu mol g(-1) h(-1)) and P25-TiO2 (7.1 mu mol g(-1) h(-1)), respectively, and exceeds the performance of most metal-free photocatalysts. This work provides new insights into the synthesis of functional groups-modified g-C3N4 with a unique structure for effective photocatalytic CO2 reduction.
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