Issue 3, 2024

Cyclic time-separated redox reaction using accumulated electrons in titanium(iv) oxide in a two-phase system

Abstract

A time-separated redox reaction using accumulated electrons in titanium(IV) oxide (TiO2) was cyclically repeated in order to increase the amount of the reduction product that has been limited by the saturation value of accumulated electrons in TiO2. Repetition of the reaction was carried out by utilizing an organic/aqueous two-phase system and the insolubility of substrates and target products in the aqueous phase. The reaction proceeded by repeating two steps: (1) electron accumulation in TiO2 at the bottom of the aqueous phase was induced under ultraviolet irradiation with low-speed stirring and (2) reduction by accumulated electrons in the two-phase interface was performed in the dark with high-speed stirring. Results indicated that the amount of the product monotonically increased as a function of the number of repetition cycles. The relationship of the product amount with the physical and chemical properties of TiO2 is discussed.

Graphical abstract: Cyclic time-separated redox reaction using accumulated electrons in titanium(iv) oxide in a two-phase system

Article information

Article type
Paper
Submitted
26 Nov 2023
Accepted
21 Dec 2023
First published
22 Dec 2023

Catal. Sci. Technol., 2024,14, 624-629

Cyclic time-separated redox reaction using accumulated electrons in titanium(IV) oxide in a two-phase system

M. Suenaga and N. Murakami, Catal. Sci. Technol., 2024, 14, 624 DOI: 10.1039/D3CY01645E

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