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Updated: Jan 20, 2026

Catalytic Scavenging of Plant Reactive Oxygen Species In Vivo by Anionic Cerium Oxide Nanoparticles

Catalytic Scavenging of Plant Reactive Oxygen Species In Vivo by Anionic Cerium Oxide Nanoparticles

Published on: August 26, 2018

チタンシリケート前駆体の動的進化：二種のチタン種とその選択的酸化における触媒的利点

Di Pan¹, Jiayu Yu¹, Ke Du¹

¹Department of Chemistry, College of Smart Materials and Future Energy, Collaborative Innovation Center of Chemistry for Energy Materials and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China.

Journal of colloid and interface science

|January 18, 2026

Abstract:

Understanding the detailed structures of active sites and the dynamic nucleation evolution during zeolite precursor formation offers effective guidance on rational design and construction of titanosilicate with optimized performance. Herein, we tracked the evolution of titanosilicate precursors (TSPs) during TS-1 nucleation, revealing the coexistence of dual Ti species, namely highly dispersed amorphous TiO₂ and tetrahedral Ti species incorporated within the silicalite framework. During nucleation, Ti atoms are initially incorporated into silicalite framework and then partially reconstruction into TiO₂ species, displaying a volcano-shaped dependence of tetrahedral Ti proportion on nucleation time. Significantly, the coexisting dual Ti species in TSPs activate highly reactive peroxyl radicals, which selectively promote olefin oxidative cleavage other than epoxidation, differing from the behavior of TS-1 and anatase TiO₂. Our research clarified the dynamic evolution of TSPs and the structure-activity relationship between their dual Ti species and oxidation pathways, thereby guiding the targeted development of titanosilicate catalysts.

キーワード:

核生成選択的酸化 TS-1 チタン種チタンシリケート前駆体

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