To obtain highly sensitive and selective nanozymes, the ternary NiMo 6 /ZIF-67/C 3 N 4 (n) nanocomposites were successfully fabricated in this work, namely, Anderson-type polyoxometalate (NH 4 ) 4 [H 6 Ni(II)Mo 6 O 24 ] (NiMo 6 ) was encapsulated into the customized cavities of ZIF-67 and then was fixed on graphitic carbon nitride (g-C 3 N 4 ). By employing the detection of H 2 O 2 and ascorbic acid (AA) as a model reaction, ternary NiMo 6 /ZIF-67/C 3 N 4 (n) nanocomposites exhibit excellent peroxidase-like activities, attributed to the synergistic effect of NiMo 6 , ZIF-67, and g-C 3 N 4 , in which NiMo 6 /ZIF-67/C 3 N 4 (2) exhibits a lower detection limit of 0.02 μM for H 2 O 2 and 0.019 μM for AA. Moreover, the NiMo 6 /ZIF-67/C 3 N 4 (2) was also successfully designed into colorimetric test paper, enabling rapid detection of AA in human serum samples. KEYWORDS: polyoxometalate, ZIF-67, g-C 3 N 4 , colorimetric biosensing, H 2 O 2 , AA

Enzyme cascade reactions in organisms have sparked tremendous interest for their coupled catalysis-facilitated efficient biochemical reactions. However, multi-enzyme cascade nanozymes remain largely unpracticed. In the work, flower-like porous ceria-based integrated...

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A new octamolybdates based Cu‐organic polymer, [Cu2(mbix)2]2[Mo8O26] (mbix=1,3‐bis(imidazol‐1‐ylmethyl) benzene), abbreviated as Cu‐Mo8, was hydrothermally synthesized and characterized by routine method. Single‐crystal X‐ray diffraction analysis shows that {Mo8} as template and linker induce and promote the formation and connection of quadcore planetary loop (Cu4mbix4) to form the 2D planetary plane, then are stacked by van der Waals forces to stabilize the whole structure. Electrochemical results show that compound Cu‐Mo8 as electrode materials for supercapacitors exhibits the better supercapacitor performance of ca. 592.2 F g−1 at 1 A g−1, along with great cycling stability, which enriches POMs chemistry in the supercapacitor field.