2023
DOI: 10.1002/smll.202207173
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π‐Conjugated In‐Plane Heterostructure Enables Long‐Lived Shallow Trapping in Graphitic Carbon Nitride for Increased Photocatalytic Hydrogen Generation

Abstract: the development of semiconductor-based photocatalysts that can efficiently split water for durable photocatalytic H 2 production is at the forefront. To date, among numerous photocatalysts that have been demonstrated for H 2 production under exposure to UV and visible light, [4][5][6]56] conjugated graphitic carbon nitride has stood out as one of the most investigated photocatalysts in the past decade owing to the advantages of its suitable energy position for water splitting, visible light harvesting, easy fu… Show more

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Cited by 37 publications
(20 citation statements)
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“…To support the results of XPS and FTIR studies further, ssNMR was examined for each NMR active atom in the binary CNBP heterojunction (Table S1). As shown in Figure d, the main peaks of CN were observed at 156.08 (CN 2 –(NH 2 )) and 163.22 (CN 3 ) ppm in the 13 C CP MAS spectra. , The peak labeled as C2 in Figure g was shifted downfield in all cases, while the peak labeled as C3 was located at a lower frequency (156.15 ppm) in CNBP and a higher frequency (155.98 ppm) in GQDs@CNBP. , The resonance at a higher frequency in the case of ternary heterojunctions can be explained by the addition of GQDs to the binary heterojunction. Therefore, the electron flow provided by GQDs toward BP reduced the electron deficiency in CN.…”
Section: Resultsmentioning
confidence: 83%
See 1 more Smart Citation
“…To support the results of XPS and FTIR studies further, ssNMR was examined for each NMR active atom in the binary CNBP heterojunction (Table S1). As shown in Figure d, the main peaks of CN were observed at 156.08 (CN 2 –(NH 2 )) and 163.22 (CN 3 ) ppm in the 13 C CP MAS spectra. , The peak labeled as C2 in Figure g was shifted downfield in all cases, while the peak labeled as C3 was located at a lower frequency (156.15 ppm) in CNBP and a higher frequency (155.98 ppm) in GQDs@CNBP. , The resonance at a higher frequency in the case of ternary heterojunctions can be explained by the addition of GQDs to the binary heterojunction. Therefore, the electron flow provided by GQDs toward BP reduced the electron deficiency in CN.…”
Section: Resultsmentioning
confidence: 83%
“…44,55 The peak labeled as C2 in Figure 2g was shifted downfield in all cases, while the peak labeled as C3 was located at a lower frequency (156.15 ppm) in CNBP and a higher frequency (155.98 ppm) in GQDs@CNBP. 56,57 The resonance at a higher frequency in the case of ternary heterojunctions can be explained by the addition of GQDs to the binary heterojunction. Therefore, the electron flow provided by GQDs toward BP reduced the electron deficiency in CN.…”
Section: Structural and Photophysical Properties Of Thementioning
confidence: 99%
“…The short lifetime of τ 1 corresponds to the fast charge recombination process, and the long-lived component (τ 2 ) results from the charge trapping into surface states. [22] Compared to BNOC-P1 (τ 1 = 25.3 ps, τ 2 = 607.1 ps), the decay time constants of BNOC-P4 are substantially increased to 34.2 ps and 1230.9 ps, illustrating the suppressed carrier recombination in the bulk and improved surface charge separation. For BNOC-P5, the strong ferroelectric polarization contributes to the further sluggish decay of τ 1 (36.6 ps), while the vanishing of facet-selective charge transportation is conducive to the surface charge recombination and shortening the carrier lifetime (τ 2 = 1180.7 ps).…”
Section: Methodsmentioning
confidence: 94%
“…The unique platelet morphology of CQWs can lead to the in-plane heterostructure, i.e., the core/crown heterostructure. The core/crown heterostructure grows in the weakly confined lateral direction, resulting in exciton-related processes occurring in the 2D plane. Core/crown heterostructures have wider and finer optical tunability, ,, allowing the advantages of CQWs to be played in the full visible-light range. ,, As the solution synthesis method provides a convenient way to artificially adjust the characteristics of heterostructures, the core/crown CQWs can be an excellent platform to study the behavior of excitons in a 2D-heterostructure system. The results of core/crown CQWs can also be generalized to other similar in-plane heterostructure systems, such as low-dimensional layered perovskites and TMDs. …”
Section: Introductionmentioning
confidence: 96%