Efficient Photo-Assisted Thermal Selective Oxidation of Toluene Using N-Doped TiO2

被引：7
作者：
Chen, Cheng [1 ,2 ]
Wu, Mingge [3 ]
Ma, Chunyan [4 ]
Song, Maoyong [2 ,4 ,5 ]
Jiang, Guibin [2 ,5 ]
机构：
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Nanotechnol & Hlth Effects, Beijing 100085, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, Key Lab Photochem, Beijing 100190, Peoples R China
[4] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Nanotechnol & Hlth Effects, Beijing 100085, Peoples R China
[5] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China
来源：
ACS OMEGA | 2023年 / 8卷 / 23期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
LIQUID-PHASE OXIDATION; SOLVENT-FREE OXIDATION; C-H BONDS; MOLECULAR-OXYGEN; NANOPARTICLES; BENZALDEHYDE; VACANCIES; O-2;
D O I：
10.1021/acsomega.3c01887
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Selective oxidation of toluene is a key reaction to producehighvalue-added products but remains a big challenge. In this study, weintroduce a nitrogen-doped TiO2 (N-TiO2) catalystto create more Ti3+ and oxygen vacancy (O-V),which act as active sites for selective oxidation of toluene via activatingO(2) to superoxide radical (center dot O-2 (-)). Interestingly, the resulting N-TiO2-2 exhibited anoutstanding photo-assisted thermal performance with a product yieldof 209.6 mmol center dot g(cat) (-1) and a tolueneconversion of 10960.0 mu mol center dot g(cat) (-1)center dot h(-1), which are 1.6 and 1.8 times greaterthan those obtained under thermal catalysis. We showed that the enhancedperformance under photo-assisted thermal catalysis was attributedto more active species generation by making full use of photogeneratedcarriers. Our work suggests a viewpoint to apply a noble-metal-freeTiO(2) system in the selective oxidation of toluene undersolvent-free conditions.
引用
收藏
页码：21026 / 21031
页数：6
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