Energy-efficient photodegradation of azo dyes with TiO2 nanoparticles based on photoisomerization and alternate UV-visible light

Hao Zhang, Da Chen, Xiaojun Lv, Ying Wang, Haixin Chang, Jinghong Li

    Research output: Contribution to journalArticlepeer-review

    68 Citations (Scopus)


    Herein, we demonstrated a UV - vis light alternate photocatalysis (UVLAP) strategy in the photodegradation of azo dyes. The UVLAP of azo dyes over TiO2 catalysts exhibited significantly higher energy efficiency than the conventional UV process by 40%, which was attributed to the photoisomerization of azo dyes and the resulting diversity of dyes' cis and trans states in interfacial properties, including conductance and spatial effects. This UVLAP strategy could contribute to the energy-saving photodegradation of azo dyes and other pollutants with photoisomerization properties and facilitate the practical application of TiO2 in the environmental remediation.

    Original languageEnglish
    Pages (from-to)1107-1111
    Number of pages5
    JournalEnvironmental Science and Technology
    Issue number3
    Publication statusPublished - 2010 Feb 1

    ASJC Scopus subject areas

    • Chemistry(all)
    • Environmental Chemistry


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