Hydrogen-bond-linked photocatalyst of g-C3N4/3, 4, 9, 10-perylenetetracarboxylic acid anhydride with different bay-substitutents

Zhang, Shuo; Guo, Huiyun; Li, Qizhe; Yu, Lan; Zhang, Haiquan

doi:10.1016/j.catcom.2018.04.009

Cited by 11 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared to g-C 3 N 4 , there is another peak (400.6 eV) in the N 1 s XPS spectra of g-C 3 N 4 /0.5 wt % 9 and g-C 3 N 4 /10 wt % 9, which is attributed to the formation of the hydrogen bonds (N−H•••O) (Figure S24). 63 From the perspective of practical applications, in addition to the excellent H 2 production performance, the durability of the photocatalyst is also very important. In order to prove the durability of the g-C 3 N 4 /0.5 wt % 9/1 wt % Pt composite, the same photocatalyst was repeatedly used under the same experimental conditions to carry out 5 cycles of photolysis of water to produce hydrogen (Figure 4d).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

ortho-Terphenylene Viologens with Through-Space Conjugation for Enhanced Photocatalytic Oxidative Coupling and Hydrogen Evolution

Zhang

et al. 2022

J. Am. Chem. Soc.

View full text Add to dashboard Cite

A series of novel ortho-terphenylene viologen derivatives (o-TPV 2+ ) with through-space conjugation (TSC) via the combination of ortho-terphenylene skeletons with viologen structure is reported. Their optoelectronic properties can be adjusted by N-arylation or N-alkylation reactions. Compared with other viologen derivatives, o-TPV 2+ not only exhibits strong photoluminescence but also retards the charge recombination process and stabilizes the diradical state without forming a quinoid structure due to the special TSC effect. Based on their special redox characteristics, o-TPV 2+ was applied to the photocatalytic oxidative coupling of benzylamine with 96% yield. In addition, pTA-o-TPV 2+ (tethered with p-toluic acid)-modified g-C 3 N 4 was used for visiblelight-driven hydrogen production for the first time, exceeding 15 times the rate over unmodified g-C 3 N 4 .

show abstract

Section: ■ Results and Discussionmentioning

confidence: 99%

ortho-Terphenylene Viologens with Through-Space Conjugation for Enhanced Photocatalytic Oxidative Coupling and Hydrogen Evolution

Zhang

et al. 2022

J. Am. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…In addition, other absorption bands for stretching vibration of C–O and C–N at 1110 cm −1 and 798 cm −1 were all shifted to lower wavenumbers. All these results reveal the presence of hydrogen bond interactions between TCPP molecules in aggregates [30].…”

Section: Resultsmentioning

confidence: 99%

Tuning the Supramolecular Structures of Metal-Free Porphyrin via Surfactant Assisted Self-Assembly to Enhance Photocatalytic Performance

Liu

et al. 2019

Nanomaterials

View full text Add to dashboard Cite

Metal-free porphyrin with good planarity is beneficial to π–π stack interactions, which promotes electron coupling and the separation and transfer of photogenerated carriers. It is necessary to develop metal-free porphyrin-based photocatalysts and exploit the photocatalytic mechanism. Herein, metal–free porphyrin (5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin, TCPP) was self-assembled through an acid-based neutralization reaction and mixing dual-solvents under surfactants to form different aggregates. Morphology structures, optical and optoelectronic properties of the TCPP aggregates were characterized in detail. TCPP self-assemblies showed higher photocatalytic activities for the degradation of phenol under visible light than untreated TCPP powders, and the aggregates of nanorods formed through the acid-based neutralization reaction in the presence of hexadecyl trimethyl ammonium bromide (CTAB) possessed 2.6 times more activity than the nanofiber aggregates formed through mixing dual-solvents. It was proved that self-assembly methods are crucial for controlling the aggregation of porphyrins to form different aggregations, which have a profound impact on the photocatalytic activity.

show abstract

Structure/Property Control in Photocatalytic Organic Semiconductor Nanocrystals

Chen

Yan

Dong

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

Photocatalysis offers a practical solution to the ever increasing energy and environmental issues by using a semiconductor to harvest freely available sunlight. Photoactive organic semiconductor nanocrystals (OSNs) are promising photocatalysts due to their structure and function which are easily tunable by molecular design. Extensive studies have yielded significant progress on OSNs in terms of photoresponse, charge carrier mobility, as well as photoconversion efficiency. This review provides a comprehensive discussion of the emerging crystal and interface engineering strategies used in optimizing structure/property of OSNs. The basic mechanisms involved in organic photocatalysis are discussed, for a better understanding of its dependence on the molecular and supramolecular structures. Then, the intermolecular interactions in molecular packing and the kinetic and thermodynamic control over the crystal growth process are summarized, with the aim of tuning the optical and electrical properties. Band energy alignment, charge carrier dynamics, and charge transfer are discussed in different heterostructures. In each case, structure/property relationships and how to tune them are emphasized. Finally, challenges and opportunities for the practical use of the organic photocatalysts are discussed.

show abstract

Hydrogen-bond-linked photocatalyst of g-C3N4/3, 4, 9, 10-perylenetetracarboxylic acid anhydride with different bay-substitutents

Cited by 11 publications

References 25 publications

ortho-Terphenylene Viologens with Through-Space Conjugation for Enhanced Photocatalytic Oxidative Coupling and Hydrogen Evolution

ortho-Terphenylene Viologens with Through-Space Conjugation for Enhanced Photocatalytic Oxidative Coupling and Hydrogen Evolution

Tuning the Supramolecular Structures of Metal-Free Porphyrin via Surfactant Assisted Self-Assembly to Enhance Photocatalytic Performance

Structure/Property Control in Photocatalytic Organic Semiconductor Nanocrystals

Contact Info

Product

Resources

About