Scavenging activity and reaction mechanism of Ti3C2Tx MXene as a novel free radical scavenger

被引：16
作者：
Qi, Zhaojun [1 ]
Wang, Sen [1 ]
Li, Yan [1 ]
Wang, Lifeng [1 ]
Zhao, Lin [1 ]
Ge, Qiang [1 ]
Zhang, Jin Zhong [2 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA
来源：
CERAMICS INTERNATIONAL | 2021年 / 47卷 / 12期
基金：
中国国家自然科学基金;
关键词：
2D materials; Ti3C2Tx MXene; Free radical scavenger; Scavenging mechanism; Scavenging activity; GRAPHENE QUANTUM DOTS; CARBON NANOTUBES; IN-VITRO; CYTOTOXICITY;
D O I：
10.1016/j.ceramint.2021.02.226
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A novel free radical scavenger, multi-layered Ti3C2Tx MXene (ML-Ti3C2Tx), has been studied by evaluating its scavenging activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH center dot). It exhibits high scavenging efficiency (95% in 10 min) at low dosage (0.06 mg/mL). Based on the analysis of structure and surface states of ML-Ti3C2Tx before and after reaction with DPPH center dot and a series of comparative experiments, including few-layered Ti3C2Tx MXene (FL-Ti3C2Tx), original Ti3AlC2, and soluble Ti species derived from ML-Ti3C2Tx, the observed high scavenging activity is attributed to the intrinsic reducing property of ML-Ti3C2Tx rather than the hydrogen donation ability from surface functional groups. A model is proposed to explain the scavenging mechanism.
引用
收藏
页码：16555 / 16561
页数：7
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