A study of plasmon-driven catalytic 4-NBT to DMAB in the dry film by using spatial Raman mapping spectroscopy  

作　　者：Yansheng Liu Junpeng Deng Zhicheng Jin Tianxing Liu Jin Zhou Feng Luo Guofu Wang 

机构地区：[1]School of Microelectronics and Materials Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China [2]Department of NanoEngineering,University of California San Diego,La Jolla,CA 92093,USA [3]Tianjin Key Lab for Rare Earth Materials and Applications,Center for Rare Earth and Inorganic Functional Materials,School of Materials Science and Engineering&National Institute for Advanced Materials,Nankai University,Tianjin 300350,China

出　　处：《Nano Research》2022年第7期6062-6066,共5页纳米研究（英文版）

基　　金：supported by the Guangxi Natural Science Foundation Project(No.2021GXNSFBA196049);Guangxi Science and Technology Project(No.AD22035215);the National Natural Science Foundation of China(No.61761009).

摘　　要：Plasmon-driven catalytic reaction(PDCR)as a part of photocatalysis has attracted immense attention.Due to the collective oscillation of free electrons at the surface of metallic nanostructures,the charge distributions store energy from the incident light that could transfer energy to molecules that promote photocatalysis.As an environment-friendly and green photocatalysis process,PDCR illustrates a brilliant future.In this study,the PDCR efficiency of photo-reducing 4-nitro-benzenthiol(4-NBT)dry film to p,p'-dimercaptoazobenzene(DMAB)in ambient conditions has been studied by using Ag nanodiscs(NDs)and Ag nanoparticles(NPs)as catalysts.The distribution of catalytic efficiency of 4-NBT to DMAB using an individual Ag ND catalyst has been illustrated using spatial Raman mapping.The result is direct evidence that the PDCR efficiency has a positive correlation with plasmon-induced electromagnetic field intensity.Additionally,time-dependent surface-enhanced Raman scattering(SERS)experiments reveal that the PDCR of 4-NBT to DMAB is reciprocal.The discovery in this research will aid to improve the PDCR performance and modulate the catalysis reaction for a high reduction of 4-NBT in industrial.

关 键 词：PLASMON photocatalysis 4-nitro-benzenthiol(4-NBT) surface-enheanced Raman scattering(SERS) 

分 类 号：O643[理学—物理化学]