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The modification of TiO_2 nanotube arrays (TiO_2 NTS) to enhance the photoelectrochemical performance is highly applauded yet challenging. In this work, the multi-modification of TiO_2 NTS has been achieved by… Click to show full abstract
The modification of TiO_2 nanotube arrays (TiO_2 NTS) to enhance the photoelectrochemical performance is highly applauded yet challenging. In this work, the multi-modification of TiO_2 NTS has been achieved by introducing hydrogenation (self-doping) and sulfur-doping as well as semiconductor compounding of WO_3, marked as H/S-WO_3/TiO_2 NTS. Benefiting from the synergistic effect of self-doping, sulfur-doping and WO_3 compounding on TiO_2 NTS, the as-prepared H/S-WO_3/TiO_2 NTS achieved a saturated photocurrent density of 2.48 mA/cm^2. The corresponding photoconversion efficiency was 1.45%, which was 6.59 times than that of pure TiO_2 NTS. Our superior TiO_2 NTS enabled by semiconductor compounding, self-doping and sulfur-doping enlightens a new arena for the development of high-performance photoanode materials. Graphical Abstract
Journal Title: MRS Communications
Year Published: 2023
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