Synergistic enhancement of photocatalytic H2 production by Ni decorated 2D bubble-like carbon nitride |
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Authors: | Xinyuan Xia Lin Tang Hongyan Ji Luyao Kang Zimeng Wei Shanshan Lou Junfeng Xie Bo Tang |
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Affiliation: | College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes (Ministry of Education), Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan, Shandong, 250014, China |
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Abstract: | In this paper, a novel 2D bubble-like g-C3N4 (B–CN) with a highly porous and crosslinked structure is successfully synthesized via a cost-effective bottom-up process. The as-prepared B–CN photocatalyst delivers a considerably expanded specific surface area and increased active sites. Moreover, the 2D bubble-like structure can afford shortened diffusion paths for both photogenerated charge carriers and reactants. As a result, the photocatalytic H2 evolution rate of B–CN reached 268.9 μmol g?1 h?1, over 5 times more than that of bulk C3N4. The Ni ions were further deposited on B–CN as a cocatalyst to enhance the photocatalytic activity. Benefit from the synergy of 2D bubble-like structure and Ni species cocatalyst, recombination of photoinduced charges was greatly inhibited and the hydrogen evolution reaction (HER) was significantly accelerated. The resulted catalyst achieved a dramatically high H2 evolution rate of 1291 μmol g?1 h?1. This work provides an alternative way to synthesize novel porous carbon nitride together with non-noble metal cocatalysts toward enhanced photocatalytic activity for H2 production. |
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Keywords: | Morphology engineering Ni cocatalyst Synergistic effect |
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