Table 1 Comparison of our strategy with the main methods reported for sensitive detection of copper ions
Detection methods | Strategies | Sample volume (μL) | Linear range (nmol L−1) | Limit of detection (nmol L−1) | Ref. |
|---|---|---|---|---|---|
Colorimetric | PEBP | 15 | 0–1.25 ×105 | 20.4 | |
Zr-TPPS MOFs | 10 | 1 ×10−4–2.0 ×10−2 | 4.96 | ||
Fluorescence | CdSe@ZIF-8/PAA nanochannel membrane | / | 10–1.0 ×10−3 | 4.0 ×10−6 | |
AIE-active MOFs | 2 | 1.0 –100 | 0.55 | ||
SERS | HOX@Ag-PVDF | 500 | 1.0 ×103–0.1 | 5.2 ×10−2 | |
L-Cys/IP6@Ag | / | 1.0 ×103–0.1 | 0.01 | ||
Photoelectrochemical | Ni/Co3O4/MnO2/CS foam | / | 0–6.5 ×103 | 6.9 | |
CdTe-Cu2Te QDs | 100 | 1.0–1.0 ×104 | 0.4 | ||
ZnS QDs | / | 1.0 ×10−3–1.0 | 4.5 ×10−4 | ||
Electrochemiluminescence | ZnO@Cys NFs-TCPP aggregates | / | 1.0 ×10−3–5.0 ×102 | 3.3 ×10−4 | |
Thiol-Au NCs | / | 1.0 ×10−4–1.0 ×102 | 9.15 ×10−5 | ||
Electrochemical | Click chemistry | 1 | 1.0 ×10−3–5.0 ×102 | 3.3 ×10−4 | |
Ti3C2Tx/MWNTs/Au | / | 1.56 ×10−7–9.36 ×10−6 | 1.56 ×10−9 | ||
Click chemistry | / | 1.0 ×10−9–1.0 ×104 | 3.8 ×10−10 | ||
Fast scan voltammetry | Click chemistry & deep learning | 10 | 2.0 ×10−10–4.0 ×10−9 | Single atom | This work |
