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Visible-light driven Gd2Ti2O7/GdCrO3 composite for hydrogen evolution.

K M Parida1, Amtul Nashim, Saroj Ku Mahanta

  • 1Colloids and Materials Chemistry Department, Institute of Minerals and Materials Technology (CSIR), Bhubaneswar, 751 013, Orissa, India. paridakulamani@yahoo.com

Dalton Transactions (Cambridge, England : 2003)
|October 26, 2011
PubMed
Summary

This study developed novel Gd(2)Ti(2)O(7)/GdCrO(3) composites for efficient visible-light-driven hydrogen production. The GTC composite (1:1:1 Cr:Gd:Ti ratio) demonstrated the highest photocatalytic activity without any co-catalyst.

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Area of Science:

  • Materials Science
  • Photocatalysis
  • Renewable Energy

Background:

  • Developing efficient photocatalysts for hydrogen production is crucial for sustainable energy.
  • Visible-light-driven processes are desirable for practical applications.

Purpose of the Study:

  • To synthesize and characterize Gd(2)Ti(2)O(7)/GdCrO(3) composites.
  • To evaluate their photocatalytic activity for hydrogen production under visible light.
  • To elucidate the mechanism behind the enhanced photocatalytic performance.

Main Methods:

  • Solid-state combustion synthesis.
  • Characterization using XRD, SEM, DRUV-vis, BET, PL, XPS, and photocurrent measurements.
  • Hydrogen production rate measured by gas chromatography (GC).

Main Results:

  • Successful synthesis of Gd(2)Ti(2)O(7)/GdCrO(3) composites.
  • The GTC composite (Cr:Gd:Ti = 1:1:1) exhibited the highest hydrogen production efficiency.
  • Photocurrent and PL data provided insights into the enhanced photocatalytic mechanism.

Conclusions:

  • Gd(2)Ti(2)O(7)/GdCrO(3) composites are promising for visible-light photocatalytic hydrogen production.
  • The GTC composite shows superior performance, indicating potential for renewable hydrogen generation.
  • Understanding the mechanism aids in designing more efficient photocatalytic systems.