Sensitizers on inorganic carriers for decomposition of the chemical warfare agent yperite

Bogdan Cojocaru, Vasile I. Parvulescu, Elena Preda, Gabriel Iepure, Vasile Somoghi, Esther Carbonell Llopis, Mercedes Alvaro, Hermenegildo García

Research output: Contribution to journalArticlepeer-review


Sulfur-containing compounds, such as mercaptans, alkali sulfides, alkali sulfites, and alkali thiosulfates, are byproducts of industrial processes and pollutants of waste and natural waters. Other sulfur-containing compounds such as yperite are dangerous chemical weapons. Efficient photocatalytic decomposition of these molecules is a process that can find applications in emergency situations or for the controlled destruction of chemical warfare stockpiles. A series of heterogeneous photocatalysts consisting of a metal phthalocyanine or 2,4,6-triphenylpyrylium as photoactive components encapsulated inside the cavities of zeolite Y or the mesoporous channels of MCM-41 or supported on silica ortitania-silica was tested for the photocatalytic decomposition of yperite. Two types of photoreactors, either an open reactor naturally aerated or a closed quartz tube with a constant airflow using UV or visible ambient light, were used. These tests demonstrated that iron and manganese phthalocyanine and 2,4,6-triphenylpyrylium embedded in NaY ortitania-silica can be suitable solid photocatalysts for the degradation of yperite using UV and visible irradiation.

Original languageEnglish
Pages (from-to)4908-4913
Number of pages6
JournalEnvironmental Science and Technology
Issue number13
Publication statusPublished - 1 Jul 2008
Externally publishedYes


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