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Full-Spectrum-Activated Confining Aerogel With Dual-Scale Photothermal Regulation for Ultra-Efficient Low-Temperature

Jiaxin Ni^1,2, Sha Wang^1,2, Lei Zheng^1,2

¹Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, People's Republic of China.

Small (Weinheim an Der Bergstrasse, Germany)

|July 10, 2026

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Researchers developed a novel aerogel material for efficient photocatalytic remediation in cold water. This innovative material enhances pollutant degradation by utilizing dual-scale photothermal regulation and broadband light absorption, even at low temperatures.

Area of Science:

Environmental Science
Materials Science
Chemical Engineering

Background:

Cold aquatic environments pose challenges for photocatalytic remediation due to slow reaction rates and heat loss.
Efficient pollutant degradation requires overcoming kinetic limitations and maintaining catalyst activity in low-temperature conditions.

Purpose of the Study:

To develop a floating, confining aerogel for enhanced photocatalytic remediation in cold aquatic environments.
To investigate the synergistic effects of broadband light absorption and dual-scale photothermal regulation on pollutant degradation efficiency.

Main Methods:

Fabrication of a hierarchically porous aerogel immobilizing FBBov@MoS2 catalytic units.
Utilizing full-spectrum (UV-Vis-NIR) light absorption for enhanced photocatalysis.

Keywords:

cold aquatic environments confining aerogel dual‐scale photothermal regulation full‐spectrum irradiation nonlinear synergistic effect

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Implementing dual-scale photothermal regulation to create microscale hotspots and macroscopic heat accumulation.

Main Results:

Achieved 99.1% tetracycline degradation within 120 minutes at 10°C, with high activity (92% removal) at 6°C.
Demonstrated synergistic photothermal effects accelerating charge separation and redox chemistry.
Identified •O2− and •OH as dominant reactive oxygen species, with distinct roles for UV, visible, and NIR light.

Conclusions:

The developed aerogel offers a generalizable design principle for high-performance photocatalysis in cold environments.
Dual-scale photothermal-photocatalytic coupling significantly enhances remediation efficiency in challenging cold aquatic conditions.
The material shows broad pollutant scope, excellent durability, and effectiveness in real river water.