Engineering Interface with a One-Dimensional RuO₂/TiO₂ Heteronanostructure in an Electrocatalytic Membrane Electrode:...

Area of Science:

• Environmental Science & Engineering
• Materials Science
• Electrochemistry

Background:

• Advanced oxidation processes (AOPs) are traditional methods for micropollutant degradation.
• Electrocatalytic membrane reactors offer an efficient and environmentally compatible alternative to AOPs.
• Optimizing the interface design of electrocatalysts within membrane electrodes is crucial for reactor performance.

Purpose of the Study:

• To develop a novel three-dimensional porous membrane electrode for enhanced micropollutant decomposition.
• To investigate the electrocatalytic performance of RuO2/TiO2 heterojunction nanorods for wastewater treatment.
• To understand the structure-performance relationship in electrocatalytic membranes.

Main Methods:

• Fabrication of a 3D porous membrane electrode using in situ growth of 1D RuO2/TiO2 heterojunction nanorods on a carbon nanofiber membrane.
• Utilized a facile hydrothermal and subsequent thermal treatment approach for nanorod synthesis.
• Employed the membrane electrode as an anode in a gravity-driven electrocatalytic membrane reactor.

Main Results:

• Achieved over 98% degradation efficiency for bisphenol-A and sulfadiazine.
• The 1D RuO2/TiO2 heterointerfacial structure facilitated fast electron transfer and high hydroxyl radical generation.
• The membrane electrode demonstrated a large effective surface area, contributing to superior performance.

Conclusions:

• The developed RuO2/TiO2 heterojunction nanorod membrane electrode shows high efficiency for micropollutant degradation.
• The unique heterointerfacial structure is key to the enhanced electrocatalytic activity.
• This work provides a novel pathway for designing highly effective and low-consumptive electrocatalytic membranes for wastewater treatment.