Li Pengju, Yuan Wei, Hu Ke
Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, China.
Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai 200438, China.
iScience. 2025 Mar 4;28(4):112149. doi: 10.1016/j.isci.2025.112149. eCollection 2025 Apr 18.
Nanozymes are promising synthetic alternatives to natural enzymes owing to their unique physical and chemical properties, but improving their thermocatalytic activity often involves complex procedures. This study introduces a light-induced approach to enhance the catalytic activity of facilely prepared porous cerium oxide ( ) nanozymes. Under visible light irradiation, the catalytic efficiency of the more than doubles compared to its thermocatalytic efficiency. Spectroscopic analyses reveal that this enhancement stems from a ligand-to-metal charge transfer (LMCT) band, arising from peroxide species adsorbed on the surface. As a practical demonstration, P-CeO2 exhibits visible-light enhanced scavenging of reactive oxygen species (ROS) . Overall, this study provides new mechanistic insights of using LMCT-induced visible light catalysis for the improvement of catalytic activity of light-responsive nanozymes.
纳米酶因其独特的物理和化学性质，是天然酶很有前景的合成替代品，但提高它们的热催化活性通常涉及复杂的过程。本研究引入了一种光诱导方法来增强简便制备的多孔氧化铈（ ）纳米酶的催化活性。在可见光照射下， 的催化效率比其热催化效率提高了一倍多。光谱分析表明，这种增强源于吸附在 表面的过氧化物物种产生的配体到金属的电荷转移（LMCT）带。作为实际应用，P-CeO2表现出可见光增强的活性氧（ROS）清除能力。总体而言，本研究为利用LMCT诱导的可见光催化来提高光响应纳米酶的催化活性提供了新的机理见解。
