文献类型：期刊文献

英文题名：Unconventional Photoconversion from In-Plane 2D Heterostructures of 2D Transition Metal Carbides/Semiconductors

作者：Zhang, Bowei[1];Chu, Tianshu[1];Bai, Qi[2];Zhu, Chongqin[2,3];Francisco, Joseph S.[3];Xuan, Fuzhen[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai Key Lab Intelligent Sensing & Detect Tec, Key Lab Pressure Syst & Safety,Minist Educ, Shanghai 200237, Peoples R China;[2]Beijing Normal Univ, Minist Educ, Coll Chem, Key Lab OfTheoret & Computat Photochem, Beijing 100875, Peoples R China;[3]Univ Penn, Dept Earth & Environm Sci, Philadelphia, PA 19104 USA

年份：2022

卷号：6

期号：11

外文期刊名：SOLAR RRL

收录：;EI(收录号：20223612696942);WOS:【SCI-EXPANDED(收录号:WOS:000848443900001)】；

基金：B.Z., T.C., and Q.B. contributed equally to this work. This work was supported by the National Natural Science Foundation of China (Grant. No. 52105145) and the Fundamental Research Funds for the Central Universities (SLG00212010, JKG01211512). The authors thank Prof. Teri W. Odom for the support on preliminary materials synthesis and characterizations at the Northwestern University, Evanston, Illinois, USA. The authors thank Dr. Liang Luo at the Ames Laboratory, U.S. Department of Energy, Ames, USA, for helpful assistance on ultrafast spectroscopy analysis. The authors thank Prof. Sheng Dai at the Feringa Nobel Prize Scientist Joint Research Center of the East China University of Science and Technology for the assistance in TEM characterization.

语种：英文

外文关键词：2D MXenes; charge transfer; in-plane heterostructures; photothermal conversion; water evaporation

摘要：2D transition metal carbides/nitrides (MXenes) are thought of promising photothermal materials due to their broadband localized surface plasma resonance (LSPR) and attractive electromagnetic interference (EMI) properties. However, the weak oxidation resistance and unclear photothermal mechanism of MXenes impede their photothermal modulations. Herein, the in-plane 2D Ti3C2/TiO2 heterostructures are fabricated by partial oxidation and an unconventional photothermal effect under near infrared irradiation, even if the oxidation compromises the EMI and LSPR capacities, is demonstrated. Such performance is ascribed to the faster transfer of photoexcited electrons across the seamless in-plane Ti3C2/TiO2 heterointerface than the reported out-of-plane one, and the 1-2 orders of magnitude faster relaxation processes of electrons than the ground bleaching in the Original MXene. These experimental results are well-supported by theoretical calculations. The conceptual advances broaden the fundamental understanding of the photoconversion of MXenes, which would be extended into a variety of applications, such as biomedical therapy, photosynthesis, and photovoltaics.