影响因子：

10.8

DOI码：

10.1021/acs.est.5c16347

发表刊物：

Environmental Science & Technology

关键字：

ternary layered double hydroxide；toluene mineralization；hydroxyl reconstruction；reactive oxygen species；photocatalysis

摘要：

Selective regulation of reactive oxygen species (ROS) is crucial for achieving complete mineralization of volatile organic compounds (VOCs). Here, we report the first structurally distinct ZnSnGa ternary layered double hydroxide (ZnSnGa LDH), where Ga3+ serves as a framework cation rather than a dopant. This unique lattice configuration weakens Ga−OH bonds and enables light-driven hydroxyl reconstruction. The resulting detach−vacancy−replenishment cycle continuously generates surface hydroxyl vacancies, exposing unsaturated Ga sites that promote p−p orbital hybridization with O2. Consequently, O2 is selectively activated into singlet oxygen (1O2), while dissociative hydroxyls are oxidized into •OH. In situ spectroscopy, radical trapping, and density functional theory (DFT) reveal that 1O2 preferentially attacks benzylic C−H bonds to trigger ring opening, whereas •OH accelerates intermediate oxidation. This complementary ROS synergy enables nearly complete toluene degradation (≈100%) with 99.8% mineralization efficiency, high stability (10 cycles), and, critically for practical application, broad humidity tolerance (0−100% RH). Beyond VOC abatement, this work establishes light-driven hydroxyl reconstruction as an intrinsic property of the ternary LDH lattice, offering a generalizable defect-engineering strategy for selective ROS regulation. These findings broaden the LDH compositional space and provide a framework for next-generation photocatalysts for robust environmental remediation.

第一作者：

马浩

合写作者：

胡先礼,董帆

论文类型：

SCI

通讯作者：

方瑞梅,李宇涵

卷号：

60

ISSN号：

0013-936X

是否译文：

否

发表时间：

2026-02-25

收录刊物：

SCI