Video Experimental Relacionado

Updated: Feb 4, 2026

Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst

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Published on: April 22, 2016

Mineralización de acetaldehído por un fotocatalizador de WO3 anclado con ciclodextrina, independiente del oxígeno,

Woojung Jeon¹, Seunghyun Weon², Ye He³

¹Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea.

Environmental science & technology

|February 3, 2026

Abstract:

Photocatalytic degradation of volatile organic compounds (VOCs) using visible light has been widely investigated, but its practical implementation remains constrained by several limiting factors. Here, we prepared carboxymethyl-β-cyclodextrin (CMCD)-anchored WO₃ that enabled visible-light-driven mineralization of acetaldehyde even under O₂-free conditions. Anchoring CMCD on WO₃ facilitated interfacial charge separation, enhancing the photocatalytic performance. Spectroscopic and electrochemical analyses revealed that loading CMCD on WO₃ induced the formation of a charge-transfer complex via C-O-W bonding and extended the charge carrier lifetime by trapping electrons in CMCD. CMCD/WO₃ sustained ^•OH generation under visible light (λ > 420 nm) and fully mineralized acetaldehyde even in the absence of O₂. It also produced dioxygen from water oxidation in O₂-free conditions, supplying O₂ needed to fully mineralize VOCs to CO₂, and it enabled an unconventional three-electron reduction of O₂ to ^•OH. CMCD/WO₃ exhibited a visible light degradation efficiency comparable to that of Pt-loaded WO₃. In particular, CMCD/WO₃ exhibited a higher carbon mass balance for acetaldehyde degradation than Pt/WO₃, and this value remained nearly unchanged under both oxygen-rich and oxygen-free conditions. CMCD/WO₃ also demonstrated long-term stability across repeated photocatalytic cycles with no decomposition of the CMCD structure. These findings highlight a supramolecular design strategy for developing an unconventional visible-light-active photocatalyst for indoor air purification, especially in enclosed or oxygen-depleted environments where conventional photocatalysts fail to operate.

Palabras clave:

degradación de compuestos orgánicos volátiles aire interior purificación de aire fotocatalítico trióxido de tungsteno fotocatalizador de luz visible

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