Core-Shell Heterostructured Composite Architected from a Multilanthanide-Included Phospho(III)tungstate and
Guoping Liu1, Jun Jiang1, Baoxing Zeng1
1Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, China.
Inorganic Chemistry
|February 4, 2026
Summary
Researchers developed novel lanthanide-containing polyoxometalate nanozymes. These core-shell MILFe@1 composites show enhanced catalytic oxidation of TMB without H2O2, highlighting potential for advanced nanozyme applications.
Area of Science:
- Materials Science
- Nanotechnology
- Catalysis
Background:
- Developing efficient and selective multicomponent nanozymes is crucial for advanced catalytic applications.
- Lanthanide-containing polyoxometalates (Ln-POMs) offer unique electronic and structural properties for catalysis.
- Metal-organic frameworks (MOFs) like MIL-53Fe (MILFe) provide versatile platforms for composite material design.
Purpose of the Study:
- To synthesize a novel multilanthanide-containing phospho(III)tungstate and integrate it with MILFe to create core-shell heterostructured nanozymes.
- To evaluate the catalytic performance of the resulting MILFe@1 composites in the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB).
- To investigate the role of the polyoxometalate shell in facilitating electron transfer and enhancing catalytic efficiency.
Main Methods:
- Synthesis of a multilanthanide-containing phospho(III)tungstate ([H2N(CH3)2]8Na12H16[La4(H2O)15W8(tart)3(H2tart)O20]2[H2P2W14O52]4·52H2O, 1).
- Ultrasonic treatment of 1 to form a nanofilm and subsequent coating onto MILFe to create MILFe@1 core-shell composites.
- Catalytic evaluation of MILFe@1 composites for TMB oxidation, optimizing conditions and assessing performance without H2O2.
Main Results:
- Successful synthesis of the multilanthanide-containing phospho(III)tungstate (1) and formation of MILFe@1 core-shell heterostructures.
- MILFe@1 composites exhibited significantly enhanced catalytic activity for TMB oxidation.
- The MILFe@1-2 composite demonstrated robust performance across a wide TMB concentration range, notably without requiring H2O2.
Conclusions:
- The integration of lanthanide-containing polyoxometalates with MOFs can yield highly efficient core-shell heterostructured nanozymes.
- The polyoxometalate shell plays a key role in promoting rapid electron transfer kinetics, boosting overall catalytic performance.
- These findings present a promising strategy for designing advanced nanozymes with superior catalytic efficiency and selectivity.
