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Creation of Interfacial S4-Sn-N2 Electron Pathways for Efficient Light-Driven Hydrogen Evolution.

Yihang Yin1, Peng Xiang1, Yujie Zhou2

  • 1Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, China.

Small (Weinheim an Der Bergstrasse, Germany)
|February 11, 2024
PubMed
Summary

This study developed a novel S4-Sn-N2 composite photocatalyst for enhanced hydrogen production. The Z-scheme structure significantly boosts photocatalytic activity and carrier transport efficiency.

Keywords:
C3N4SnS2electron transfer pathwayheterojunction

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Area of Science:

  • Materials Science
  • Photocatalysis
  • Renewable Energy

Background:

  • Effective charge transfer in semiconductor heterostructures is crucial for photocatalysis.
  • Controlling in situ hetero-structure formation and binding modes presents significant challenges.

Purpose of the Study:

  • To develop a novel composite photocatalyst with an efficient Z-scheme charge transfer channel.
  • To enhance photocatalytic hydrogen production efficiency using SnS2 and tubular carbon nitride (TCN).

Main Methods:

  • In situ loading of hydrolytic SnCl2·2H2O onto a layered carbon nitride precursor.
  • Pyrolysis and vulcanization processes to form the S4-Sn-N2 composite.
  • Characterization of the SnS2-TCN interface and micro-structure.

Main Results:

  • A S4-Sn-N2 composite with SnS2 and TCN was successfully synthesized.
  • The composite exhibited an increased SnS2-TCN contact interface, forming a Z-scheme charge transfer pathway.
  • Photocatalytic hydrogen production rate reached 86.4 µmol h-1, 3.15 times higher than bare TCN.

Conclusions:

  • The S4-Sn-N2 Z-scheme heterojunction effectively promotes charge separation and transport.
  • The composite demonstrates enhanced photocatalytic activity, stability, and redox ability for hydrogen production.