TY - JOUR
T1 - Boosted electromagnetic wave absorption performance from vacancies, defects and interfaces engineering in Co(OH)F/Zn0.76Co0.24S/Co3S4 composite
AU - Liu, Jiaolong
AU - Zhang, Limin
AU - Wu, Hongjing
AU - Zang, Duyang
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/5/1
Y1 - 2021/5/1
N2 - The vacancies, defects and interfaces engineering is a powerful approach to regulate electromagnetic (EM) parameters and enhance absorption ability, but has not been completely elucidated, especially in binary metal sulfides (BMS). Herein, to get deeper insight into such mentioned-above engineering in boosting EMW absorption ability, two different strategies are presented and compared. Namely, a simple oxidation and scalable solvothermal sulfuration approaches are conducted to respectively synthesize the corresponding ZnCo2O4/ZnO composites and Co(OH)F/Zn0.76Co0.24S/Co3S4 composites. Especially, employing a series of characterization techniques, we pioneer to directly discover that a large number of sulfuration-induced sulfur vacancies observed by XPS, lattice defects and heterogeneous interfaces evidenced by HR-TEM, Raman and PL spectra are responsible for the enhanced polarization loss and conduction loss of Co(OH)F/Zn0.76Co0.24S/Co3S4. Therefore, the remarkable validity of sulfuration strategy for elevating EMW absorption ability by vacancies, defects and interfaces is revealed in comparison with oxidation tactic, which is largely significant in optimizing the EMW absorption capacity.
AB - The vacancies, defects and interfaces engineering is a powerful approach to regulate electromagnetic (EM) parameters and enhance absorption ability, but has not been completely elucidated, especially in binary metal sulfides (BMS). Herein, to get deeper insight into such mentioned-above engineering in boosting EMW absorption ability, two different strategies are presented and compared. Namely, a simple oxidation and scalable solvothermal sulfuration approaches are conducted to respectively synthesize the corresponding ZnCo2O4/ZnO composites and Co(OH)F/Zn0.76Co0.24S/Co3S4 composites. Especially, employing a series of characterization techniques, we pioneer to directly discover that a large number of sulfuration-induced sulfur vacancies observed by XPS, lattice defects and heterogeneous interfaces evidenced by HR-TEM, Raman and PL spectra are responsible for the enhanced polarization loss and conduction loss of Co(OH)F/Zn0.76Co0.24S/Co3S4. Therefore, the remarkable validity of sulfuration strategy for elevating EMW absorption ability by vacancies, defects and interfaces is revealed in comparison with oxidation tactic, which is largely significant in optimizing the EMW absorption capacity.
KW - Co(OH)F/ZnCoS/CoS composites
KW - Electromagnetic wave absorption
KW - Polarization loss mechanism
KW - Solvothermal sulfuration
UR - http://www.scopus.com/inward/record.url?scp=85099819697&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2021.128601
DO - 10.1016/j.cej.2021.128601
M3 - 文章
AN - SCOPUS:85099819697
SN - 1385-8947
VL - 411
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 128601
ER -