选择性
光催化
催化作用
材料科学
光化学
活性氧
激进的
异质结
氧化物
氧气
分子
吸附
无机化学
化学
有机化学
生物化学
光电子学
冶金
作者
Wenrui Dai,Zhang Shao,Huan Shang,Shuning Xiao,Zhangliu Tian,Wenbo Fan,Xiaolang Chen,Shike Wang,Wei Chen,Dieqing Zhang
标识
DOI:10.1002/adfm.202309426
摘要
Abstract Semiconductor photocatalytic technology holds promise in efficiently reducing low concentrations of gaseous nitric oxide (NO). However, the suboptimal selectivity in NO removal, leading to the undesired production of NO 2 byproducts, poses a challenge. In this study, a defective CdS/Na 2 Ti 3 O 7 heterostructure is rationally designed with strong electronic interaction and intimate interface contact for promoting charge transfer kinetics. This design refines reactive oxygen species (ROS) generation, resulting in an impressive 81% NO elimination and 99.7% selectivity toward nitrates. Detailed mechanistic studies reveal an intriguing catalysis scenario in which reactant molecules are selectively adsorbed and activated at different sites. Anionic vacancies on the CdS/Na 2 Ti 3 O 7 surface render the activation of molecular O 2 to reactive superoxide radicals (O 2 − ) species. Furthermore, intrinsic surface basicity and O vacancy sites of the Na 2 Ti 3 O 7 cocatalyst facilitate the capture and activation of acidic nitrogen oxides (NO x ) molecules as nitrate species, contributing to enhanced catalytic activity and selectivity. As a result, anionic vacancies and basic sites over CdS/Na 2 Ti 3 O 7 heterostructure synergistically regulate the NO x oxidation pathway, refining the products toward nitrate with remarkable selectivity. These insights guide the development of advanced photocatalytic systems for environmental remediation, highlighting the importance of managing ROS production for efficient pollutant removal.
科研通智能强力驱动
Strongly Powered by AbleSci AI