Oxygen-vacancy-rich amorphous MnO2@MOF-808 nanozyme for dual-mode colorimetric and smartphone-assisted determination of Sr2+ and H2O2.
The rapid and specific monitoring of toxic strontium (Sr2+) contamination is critically important yet challenging, as it typically relies on non-portable and expensive instrumentation. Herein, the crystal-phase dependence of MnO2 nanozymes was systematically investigated by in situ growth of five representative polymor...