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Beyond Surface-Localized Reaction Paradigm: Intramacropore-Confined Thermal-Field-Driven Photothermal Reactivity

Leitao Zhang1, Yu Zhang1,2, Chaofan Xu1

  • 1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China.

JACS Au
|August 29, 2025
PubMed
Summary

This study introduces a novel intrapore-confined thermal-field strategy for enhanced photothermal reactivity. This approach significantly boosts Congo Red pyrolysis efficiency and rate constants compared to surface-localized methods.

Keywords:
macroporephotothermalreactivity leapsurface localizationthermal field

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Nanotechnology

Background:

  • Photothermal reactions are limited by surface-localized heat, leading to suboptimal chemical reactivity.
  • Conventional methods concentrate heat on nanoscale surfaces, hindering overall reaction efficiency.

Purpose of the Study:

  • To establish an intrapore-confined thermal-field-driven reaction paradigm for enhanced photothermal reactivity.
  • To investigate photothermal Congo Red (CR) pyrolysis in ordered macroporous carbon (OMC) versus solid carbon (SC).

Main Methods:

  • Constructed intrapore-confined (OMC) and surface-localized (SC) model systems for CR pyrolysis.
  • Utilized fluorine-cerium nanodomains anchored onto macroporous walls for uniform CR distribution in OMC.
  • Employed finite element analysis to study thermal fields within the carbon materials.

Main Results:

  • The intrapore-confined system achieved near-complete CR pyrolysis (>99.00%) compared to SC (39.89%).
  • Observed a 27.73-fold increase in rate constants and a 30.71-fold enhancement in energy efficiency with the intrapore-confined approach.
  • Finite element analysis revealed an intrapore-confined thermal field with an inward-increasing temperature gradient in OMC.

Conclusions:

  • Intrapore confinement overcomes surface-localized limitations by reconstructing temperature distribution for effective reaction driving forces.
  • Macroporous architecture is a critical design principle for developing advanced photothermal materials.
  • The developed paradigm offers unprecedented photothermal reactivity and efficiency.