SONG Zhen-yong,WANG Ting-ting,WU Fang-hui,WU Kong-lin,ZHOU Jing-wei.Preparation and Research of TbVO4/g-C3N4 Composite and Its Electrochemiluminescence Detection for Cd2+[J].Journal of Instrumental Analysis,2025,44(02):302-309.
SONG Zhen-yong,WANG Ting-ting,WU Fang-hui,WU Kong-lin,ZHOU Jing-wei.Preparation and Research of TbVO4/g-C3N4 Composite and Its Electrochemiluminescence Detection for Cd2+[J].Journal of Instrumental Analysis,2025,44(02):302-309. DOI: 10.12452/j.fxcsxb.24050208.
Preparation and Research of TbVO4/g-C3N4 Composite and Its Electrochemiluminescence Detection for Cd2+
In this paper,while flaky graphitic carbon nitride(g-C
3
N
4
) was selected as carrier material,TbVO
4
with
good electrocatalytic performance,4f reactive electrons,rich oxygen vacancies and better stability was doped into
g-C
3
N
4
for preparing a novel electrochemiluminescent(ECL) sensor composite. Prepared ECL sensor can be used for the response and trace detection of heavy metal ions Cd
2+
with dissolved oxygen as the co-reactant. The morphology,phase state,elemental composition,and chemical state of the composite were comprehensively characterized using X-ray powder diffractometry(XRD),transmission electron microscopy(TEM),scanning electron microscopy(SEM),energy-dispersive spectroscopy(EDS),and X-ray photoelectron spectroscopy(XPS). The subsequent investigations reveal that TbVO
4
/g-C
3
N
4
composite,possessing enhanced electrical conductivity and electrocatalytic activity,exhibits more pronounced ECL emission signals compared to single g-C
3
N
4
. Consequently,this leads to a heightened sensitivity and extended linear detection range of ECL response changes induced by Cd
2+
inhibition. Moreover,the composite sensor also possesses low detection limit(3.98 nmol/L),excellent selectivity and reproducibility,as well as exceptional precision and accuracy for the quantification of Cd