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Updated: May 1, 2026

Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy
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Suppressing Charge Screening via Z-Scheme With Polarization Field for In Situ H2O2 Generation and Utilization.

Cheng Chen1, Junjie Ni1, Yanhui Ao1,2

  • 1Key Laboratory of Integrated Regulation and Resource Development On Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, China.

Advanced Materials (Deerfield Beach, Fla.)
|April 30, 2026
PubMed
Summary

This study introduces a novel ZnO/Zr-MOL heterojunction to overcome piezoelectric screening for efficient hydrogen peroxide (H2O2) production. The Z-scheme design enhances sustainability and catalytic activity for environmental remediation.

Keywords:
H2O2in situ utilizationsuppressing charge screeningz‐scheme

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Catalysis

Background:

  • Piezoelectric polarization in n-type semiconductors offers a sustainable route for hydrogen peroxide (H2O2) production.
  • The piezoelectric screening effect, caused by free carriers, limits efficiency by neutralizing polarization charges and suppressing redox activity.

Purpose of the Study:

  • To develop a ZnO/Zr-MOL Z-scheme heterojunction that intrinsically mitigates piezoelectric screening.
  • To enhance H2O2 production and wastewater degradation through polarization-assisted charge transfer.

Main Methods:

  • Electrostatic integration of ZnO nanoparticles with a Zr-based metal-organic layer to form a ZnO/Zr-MOL Z-scheme heterojunction.
  • Investigating interfacial coupling, polarization-regulated band bending, and charge separation mechanisms.
  • Testing catalytic performance for H2O2 production and Rhodamine B degradation in a tidal-driven reactor.

Main Results:

  • The ZnO/Zr-MOL heterojunction effectively suppressed piezoelectric screening by spatially separating piezo-generated electrons and holes.
  • Achieved a high H2O2 production rate of 13.21 mm g⁻¹ h⁻¹ in pure water.
  • Demonstrated 74.5% degradation of Rhodamine B in wastewater within 180 min using an autonomous reactor.

Conclusions:

  • The developed Z-scheme heterojunction provides a fundamental strategy to overcome piezoelectric screening limitations.
  • Polarization-assisted charge transfer in heterostructures offers a promising mechanism for enhanced catalytic applications.
  • The catalyst shows strong environmental adaptability for sustainable chemical production and remediation.