Enhanced visible-light photocatalytic activity of perylene diimide (PDI) supramolecular nanorods with Pt QDs deposited in situ

Abstract

Well-dispersed Pt quantum dots (QDs) was first to be successfully deposited on PDI supramolecular nanorods surface via a simple in situ chemical reduction. Under visible light irradiation, Pt QDs/PDI composites...

Heterostructured Perylene Diimide (PDI) Supramolecular Nanorods with SnO2 Quantum Dots for Enhanced Visible‐Light Photocatalytic Activity and Stability

“…g = 2.0033 is the fingerprint signal of PDI *À . [10] Under the same conditions, the content of PDI *À produced by the 4 %-SnO 2 QDs/PDI was significantly lower than that of PDI supramolecular nanorods, which was undoubtedly beneficial to the stability of the catalyst. In order to further amplify the ESR signal, reductive agent Na 2 S was added to the above suspension (catalyst dispersed in phenol/DMF) (Figure 8B).…”

“…[9] Therefore, introducing a potential gradient in the PDI supramolecular catalyst is a useful strategy to promote the excitons dissociation and carrier migration and ultimately realize improved separation efficiency of carriers. General methods mainly include constructing metal/carbon material-semiconductor composite (such as Pt QDs/PDI, [10] PDI@Au NPs, [11] PTCDI-C 60 , [12] PDI/rGO [13] ), coupling of semiconductor-semiconductor (such as p-Ag 2 S/n-PDI, [14] PDI/BiOCl, [15,16] Bi 2 WO 6 /PDI [17] ) or introducting of external electric field, [18] etc. Herein, hetero-structured PDI supramolecular photocatalyst with another matched semiconductor photocatalyst to construct a novel and powerful photocatalytic composite is reasonable.…”

ZnSnO3 Quantum Dot/Perylene Diimide Supramolecular Nanorod Heterojunction Photocatalyst for Efficient Phenol Degradation

“…The spontaneous π–π stacking between the perylene core skeletons within the PDI supramolecule brings forth many unique properties, including long-range π-delocalization, which allows for rapid transfer of electrons, wide light absorption, tunable electronic energy level, etc . Furthermore, this intense π–π stacking action together with other intermolecular interactions (hydrogen bonding and solvophobic interaction between alkyl liner chains) would always shape many PDI-based supramolecular products − into macroscopically quasi-1D nanostructures through influencing the arrangement of PDI molecular units within the supramolecule.…”

PTCDI-Ph Molecular Layer Stack-Based Highly Crystalline Microneedles As Single-Component Efficient Photodetector

“…Organic semiconductors have been the subject of extensive research interests over the last few decades because of their potential advantages of large-area processing, low fabrication cost, molecular as well as electronic tunability, and compatibility with plastic flexible substrates. − The successful use of these materials in thin-film-based electronic devices has been the driving force for the development of new π-conjugate system. However, a greater understanding of the molecular packing and their optical and electrical properties has become essential for the fabrication of efficient organic electronic devices. − Recently, optoelectronic devices, such as organic photodiodes and phototransistors, based on organic semiconducting material have found potential applications in light detection and signal amplifications. − The major challenges with such devices are their poor photoconductivity and the stability. , Relatively large binding energy (∼0.3 to 1 eV) of the molecules prevents exciton dissociation and boosts carrier recombination. , As a result, it is challenging to improve the photocurrent for the devices based on a single layer. Various one-dimensional structures of inorganic materials have shown enhanced photocurrent and have been used for photodetection applications. − However, different derivatives of perylene diimides have been emerging as promising materials because of their significantly enhanced performances on photocurrent. ,− …”