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dc.contributor.authorWang, Xue Lu
dc.contributor.authorFang, Wen Qi
dc.contributor.authorLiu, Wenqing
dc.contributor.authorJia, Yi
dc.contributor.authorJing, Dengwei
dc.contributor.authorWang, Yun
dc.contributor.authorYang, Ling-Yun
dc.contributor.authorGong, Xue-Qing
dc.contributor.authorYao, Ye-Feng
dc.contributor.authorYang, Hua Gui
dc.contributor.authorYao, Xiangdong
dc.description.abstractGraphitic carbon nitride (g-C3N4) is a promising two-dimensional polymeric photocatalyst in the field of solar energy conversion. In the past few years many modifications of g-C3N4 have been studied extensively; however, the difficulty in obtaining detailed structural information both on its intrinsic covalent interactions and surrounding bonding environments largely restricts the rational design and development of inherent structure-controlled g-C3N4 based photocatalysts and fundamental understanding of their mechanistic operations. Herein, we demonstrate a high-pressure hydrogenation treatment method for g-C3N4 and introduce 1D 13C and 15N and 2D 15N Radio Frequency-driven Dipolar Recoupling (RFDR) solid-state nuclear magnetic resonance spectroscopy for identifying the structural information and surrounding hydrogen-bonding environment of treated g-C3N4 samples. The surface Brønsted base sites of g-C3N4 samples can be tuned systematically through changing the treatment conditions. We find that the terminal isolated –NH2 and the hydrogenated nitrogen species in treated g-C3N4 samples seem to be the origin of their improved activities for photocatalytic hydrogen evolution and favor the enhancement of light harvesting and carrier transport. The as-prepared HCN400-4-2 sample treated at a pressure of 4 MPa and a temperature of 400 °C for 2 h in a hydrogen atmosphere displays the highest H2 evolution reaction (HER) activity, which is over 26 times higher than that of pristine g-C3N4.
dc.publisherRoyal Society of Chemistry
dc.relation.ispartofjournalJournal of Materials Chemistry A
dc.subject.fieldofresearchMacromolecular and Materials Chemistry not elsewhere classified
dc.subject.fieldofresearchMacromolecular and Materials Chemistry
dc.subject.fieldofresearchMaterials Engineering
dc.subject.fieldofresearchInterdisciplinary Engineering
dc.titleBronsted base site engineering of graphitic carbon nitride for enhanced photocatalytic activity
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorYao, Xiangdong
gro.griffith.authorWang, Yun
gro.griffith.authorJia, Yi
gro.griffith.authorYang, Huagui

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