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论文
Inhibit the formation of toxic methylphenolic by-products in photo-decomposition of formaldehyde–toluene/xylene mixtures by Pd cocatalyst on TiO2
发布时间：2022-08-27点击次数：
影响因子：
24.319
DOI码：
10.1016/j.apcatb.2021.120118
发表刊物：
Applied Catalysis B: Environmental
关键字：
Photo-oxidation of VOC mixtures；Pd cocatalyst，Formaldehyde，toluene and xylenes；Toxic intermediates；Oxygen activation
摘要：
Photocatalytic removal of single volatile organic compounds (VOCs) has been widely investigated; however, photodecomposition of VOC mixtures has been rarely addressed, which may bring safety doubts in indoor air purification due to possible formation of harmful compounds. Here we show that in photocatalytic oxidation of formaldehyde–toluene and formaldehyde–xylene mixtures, the introduction of Pd cocatalyst on TiO2 photocatalyst successfully inhibits the formation of toxic methylphenols, thus promoting the complete mineralization of VOC mixtures into CO2 via the harmless benzaldehyde intermediates. Mechanistic analysis reveals that the loading of Pd cocatalyst effectively removes the inherent surface −OH groups of TiO2, which significantly promotes the activation of O2 into radical dotOH radicals. The Pd cocatalyst also directs the radical dotOH radicals to attack the methyl group instead of the aromatic ring for the formation of benzaldehyde and its further oxidation to CO2, thus yielding a better overall photocatalytic performance.
论文类型：
期刊论文
卷号：
291
页面范围：
120118
是否译文：
否
发表时间：
2021-03-10
收录刊物：
SCI