TY - JOUR
T1 - Plasmon-induced hot carrier separation across multicomponent heterostructure in Ag@AgCl@g-C3N4 composites for recyclable detection-removal of organic pollutions via SERS sensing
AU - Xu, Jiangtao
AU - Huang, Yingying
AU - Zhang, Sihang
AU - Liu, Zhichao
AU - Jiang, Shouxiang
N1 - Funding Information:
This work was financially supported by the Hong Kong Innovation Technology Funding ( PRP/104/20TI ).
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/2/1
Y1 - 2023/2/1
N2 - The global environment is continuously being exposed to toxic organic pollutants, which also greatly threaten human health. Therefore, it is important to develop substrates for detection, identification, and removal of these organic pollutants. In this study, a multifunctional and reusable composite is prepared by anchoring Ag nanoparticles onto Cl-rich g-C3N4 nanosheets (Ag@AgCl@g-C3N4). The composites present not only excellent surface-enhanced Raman scattering (SERS) performance attributed to enhanced local electric field and SERS-active sites from the constructed structure, but also superior photocatalytic property boosted by the enhanced charge separation efficiency. These exceptional activities allow the composite to be used for detection of methylene blue with a high enhancement factor of 1.39 × 106, and a limit of detection of 1 × 10−11 M/L, as well as reusability via photocatalytic degrading the probe molecules, resulting in achieving recyclable SERS sensing applications. Furtherly, the outstanding SERS performance of the composite is demonstrated by recycling detection-degradation process for different molecules with acceptable performance decline. These results indicate that the Ag@AgCl@g-C3N4 composite provides a new path for improving traditional single-use SERS substrates and promotes practical SERS applications in sustainable detection and removal of organic pollutants.
AB - The global environment is continuously being exposed to toxic organic pollutants, which also greatly threaten human health. Therefore, it is important to develop substrates for detection, identification, and removal of these organic pollutants. In this study, a multifunctional and reusable composite is prepared by anchoring Ag nanoparticles onto Cl-rich g-C3N4 nanosheets (Ag@AgCl@g-C3N4). The composites present not only excellent surface-enhanced Raman scattering (SERS) performance attributed to enhanced local electric field and SERS-active sites from the constructed structure, but also superior photocatalytic property boosted by the enhanced charge separation efficiency. These exceptional activities allow the composite to be used for detection of methylene blue with a high enhancement factor of 1.39 × 106, and a limit of detection of 1 × 10−11 M/L, as well as reusability via photocatalytic degrading the probe molecules, resulting in achieving recyclable SERS sensing applications. Furtherly, the outstanding SERS performance of the composite is demonstrated by recycling detection-degradation process for different molecules with acceptable performance decline. These results indicate that the Ag@AgCl@g-C3N4 composite provides a new path for improving traditional single-use SERS substrates and promotes practical SERS applications in sustainable detection and removal of organic pollutants.
KW - Hot carrier separation
KW - Multicomponent heterostructure
KW - Photocatalysis
KW - SERS
UR - http://www.scopus.com/inward/record.url?scp=85141529704&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2022.155604
DO - 10.1016/j.apsusc.2022.155604
M3 - Journal article
AN - SCOPUS:85141529704
SN - 0169-4332
VL - 610
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 155604
ER -