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Dear Colleagues,

Porphyrins, phthalocyanines and porphyrazines are renowned for their unique molecular structures and versatile properties, which make them promising candidates in various fields of science and technology.

The aim of this Special Issue is to gather original research and review papers on their synthesis, characterization and properties—alone or in combination with semiconductor metal oxides or functionalized surfaces—for a wide range of applications, including but not limited to: (1) catalysis; (2) nonlinear optics; (3) photovoltaics; (4) artificial photosynthesis; (5) photodynamic therapy; (6) sensing.

We strongly encourage everyone involved in the investigation of these fascinating compounds to contribute.

Prof. Dr. Francesca Tessore
Dr. Gabriele Di Carlo
Guest Editors

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Keywords

porphyrins
phthalocyanines
porphyrazines
catalysis
nonlinear optics
photovoltaics
artificial photosynthesis
photodynamic therapy
sensing

Published Papers (1 paper)

Research

15 pages, 3873 KiB

Open AccessArticle

Sn(IV)porphyrin-Incorporated TiO₂ Nanotubes for Visible Light-Active Photocatalysis

by Nirmal Kumar Shee, Gi-Seon Lee and Hee-Joon Kim

Molecules 2024, 29(7), 1612; https://doi.org/10.3390/molecules29071612 - 3 Apr 2024

Viewed by 471

Abstract

In this study, two distinct photocatalysts, namely tin(IV)porphyrin-sensitized titanium dioxide nanotubes (SnP-TNTs) and titanium dioxide nanofibers (TNFs), were synthesized and characterized using various spectroscopic techniques. SnP-TNTs were formed through the hydrothermal reaction of NaOH with TiO₂ (P-25) nanospheres in the presence of Sn(IV)porphyrin (SnP), resulting in a transformation into Sn(IV)porphyrin-imbedded nanotubes. In contrast, under similar reaction conditions but in the absence of SnP, TiO₂ (P-25) nanospheres evolved into nanofibers (TNFs). Comparative analysis revealed that SnP-TNTs exhibited a remarkable enhancement in the visible light photodegradation of model pollutants compared to SnP, TiO₂ (P-25), or TNFs. The superior photodegradation activity of SnP-TNTs was primarily attributed to synergistic effects between TiO₂ (P-25) and SnP, leading to altered conformational frameworks, increased surface area, enhanced thermo-chemical stability, unique morphology, and outstanding visible light photodegradation of cationic methylene blue dye (MB dye). With a rapid removal rate of 95% within 100 min (rate constant = 0.0277 min⁻¹), SnP-TNTs demonstrated excellent dye degradation capacity, high reusability, and low catalyst loading, positioning them as more efficient than conventional catalysts. This report introduces a novel direction for porphyrin-incorporated catalytic systems, holding significance for future applications in environmental remediation. Full article

(This article belongs to the Special Issue Synthesis and Application of Porphyrins, Phthalocyanines and Porphyrazines)

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