V-Porphyrins Encapsulated or Supported on Siliceous Materials: Synthesis, Characterization, and Photoelectrochemical Properties
Myltykbayeva Z.K. Seysembekova A. Moreno B.M. Sánchez-Tovar R. Fernández-Domene R.M. Vidal-Moya A. Solsona B. López Nieto J.M.
November 2022MDPI
Materials
2022#15Issue 21
Metalloporphyrin-containing mesoporous materials, named VTPP@SBA, were prepared via a simple anchoring of vanadyl porphyrin (5,10,15,20-Tetraphenyl-21H,23H-porphine vanadium(IV) oxide) through a SBA-15-type mesoporous material. For comparison, vanadyl porphyrin was also impregnated on SiO2 (VTPP/SiO2). The characterization results of catalysts by XRD, FTIR, DR-UV-vis, and EPR confirm the incorporation of vanadyl porphyrin within the mesoporous SBA-15. These catalysts have also been studied using electrochemical and photoelectrochemical methods. Impedance measurements confirmed that supporting the porphyrin in silica improved the electrical conductivity of samples. In fact, when using mesoporous silica, current densities associated with oxidation/reduction processes appreciably increased, implying an enhancement in charge transfer processes and, therefore, in electrochemical performance. All samples presented n-type semiconductivity and provided an interesting photoelectrocatalytic response upon illumination, especially silica-supported porphyrins. This is the first time that V-porphyrin-derived materials have been tested for photoelectrochemical applications, showing good potential for this use.
characterization , electrochemical characterization , mesoporous silica , photoelectrocatalysis , SBA-15 , supported , vanadyl porphyrin
Text of the article Перейти на текст статьи
Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, Valencia, 46022, Spain
Al-Farabi Kazakh National University, 71 Al-Farabi Ave, Almaty, 050040, Kazakhstan
Departament d’Enginyeria Química, Universitat de València, Av. de les Universitats, s/n, Burjassot, 46100, Spain
Instituto de Tecnología Química
Al-Farabi Kazakh National University
Departament d’Enginyeria Química
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026