Rich surface hydroxyl design for nanostructured TiO2 and its hole-trapping effect

Xiao ST, Wu SM, Dong Y, Liu JW, Wang LY, Wu L, Zhang YX, Tian G, Janiak C, Shalom M, Wang YT, Li YZ, Jia RK, Bahnemann DW, Yang XY (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Chemical Engineering Journal Elsevier

Book Volume: 400

Article Number: 125909

DOI: 10.1016/j.cej.2020.125909

Abstract

The surface hydroxyl groups in TiO2 are crucial to many of its practical applications, but their controlled synthesis represents still a challenge. Herein, nanostructured TiO2 with rich surface hydroxyl species groups and high crystallinity (TiO2-OH) by high-temperature calcination have been developed by using the ionic liquid. Experimental measurements and theoretical calculations show a strong surface hydroxyl signal of two-dimensional 1H TQ-SQ MAS NMR, as well as clear changes of the charge density of TiO2 with the rich surface hydroxyl species. Moreover, the rich surface hydroxyl species groups in TiO2 not only significantly enhance its performances involving photogenerated current, photocatalysis and energy strorage but also show a bright future on marine applications because of its high activity and stability in simulation seawater. The characteristics and mechanism have been proposed to clarify the generation of surface hydroxyl species of TiO2 and the correponding directed hole-trapping at an atomic-/nanoscale.

Involved external institutions

Wuhan University of Technology CN China (CN) Hubei University CN China (CN) Heinrich-Heine-Universität Düsseldorf DE Germany (DE) Ben-Gurion University of the Negev (BGU) / אוניברסיטת בן-גוריון בנגב IL Israel (IL) Gottfried Wilhelm Leibniz Universität Hannover DE Germany (DE) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) Northeast Electric Power University CN China (CN)

How to cite

APA:

Xiao, S.-T., Wu, S.-M., Dong, Y., Liu, J.-W., Wang, L.-Y., Wu, L.,... Yang, X.-Y. (2020). Rich surface hydroxyl design for nanostructured TiO2 and its hole-trapping effect. Chemical Engineering Journal, 400. https://doi.org/10.1016/j.cej.2020.125909

MLA:

Xiao, Shi-Tian, et al. "Rich surface hydroxyl design for nanostructured TiO2 and its hole-trapping effect." Chemical Engineering Journal 400 (2020).

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