摘要
材料表面特性的调控可以通过杂原子掺杂、缺陷工程、表面功能化等多种方式来实现[1]。最近,我们研究小组展示了通过向Mn-Co氧化物中掺杂非金属硫来调节其能带和表面电子结构,通过硫掺杂所引起的电子结构的变化及基底表面的微电场的变化,来影响探针分子与基底之间的相互作用的方式和取向[2]。与此同时,随着Co^(2+)/Co^(3+)含量比例的增加,基底表面的电子密度增加,从而促进CT过程,进一步提高了电荷转移度。非金属掺杂策略对于半导体金属氧化物可以提供有效和稳定的SERS活性,也为探索催化中的CT和半导体的SERS性能之间的关系提供了一种新的策略。
Modulation of material surface properties can be achieved in a variety of ways,such as heteroatom doping,defect engineering,surface functionalisation,etc.Recently,our group has demonstrated the modulation of the energy band and surface electronic structure of Mn-Co oxides by doping them with non-metallic sulphur,influencing the mode and orientation of the interaction between the probe molecule and the substrate through changes in the electronic structure induced by the sulphur doping and changes in the micro-electric field on the substrate surface.At the same time,the electron density on the substrate surface increases with increasing Co^(2+)/Co^(3+)content ratio,thus facilitating the CT process and further increasing the charge transfer degree.The non-metal doping strategy can provide effective and stable SERS activity for semiconductor metal oxides and also provides a new strategy for exploring the relationship between CT in catalysis and the SERS properties of semiconductors.
作者
温思思
刘皓
宋薇
WEN Si-si;LIU Hao;SONG Wei(State Key Laboratory of Supramolecular Structure and Materials,College of Chemistry,Jilin University,Changchun 130012,China)
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2023年第S01期167-168,共2页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(21974054)资助
