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      A visible-IR responsive BiVO 4/TiO 2 photoanode with multi-effect point defects for photothermal enhancement of photoelectrochemical water splitting

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          Abstract

          Double point defects enhance the IR-driven photothermal effect of the BiVO 4/TiO 2 photoanode to significantly improve photoelectrochemical water splitting under sunlight.

          Abstract

          A N and Ni co-doped BiVO 4/TiO 2 nanotube array photoanode with rich oxygen vacancies is fabricated via the sequential hydrothermal-calcination method. Strong visible-infrared light absorption, good charge separation and transfer and improved water oxidation kinetics are realized through double point defects, leading to the optimal photothermal effect-enhanced photocurrent density of up to 3.15 mA cm −2 without a co-catalyst.

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          Ultrathin 2D Photocatalysts: Electronic-Structure Tailoring, Hybridization, and Applications

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            Visible-to-NIR Photon Harvesting: Progressive Engineering of Catalysts for Solar-Powered Environmental Purification and Fuel Production

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              TiO2/BiVO4 Nanowire Heterostructure Photoanodes Based on Type II Band Alignment

              Metal oxides that absorb visible light are attractive for use as photoanodes in photoelectrosynthetic cells. However, their performance is often limited by poor charge carrier transport. We show that this problem can be addressed by using separate materials for light absorption and carrier transport. Here, we report a Ta:TiO2|BiVO4 nanowire photoanode, in which BiVO4 acts as a visible light-absorber and Ta:TiO2 acts as a high surface area electron conductor. Electrochemical and spectroscopic measurements provide experimental evidence for the type II band alignment necessary for favorable electron transfer from BiVO4 to TiO2. The host–guest nanowire architecture presented here allows for simultaneously high light absorption and carrier collection efficiency, with an onset of anodic photocurrent near 0.2 V vs RHE, and a photocurrent density of 2.1 mA/cm2 at 1.23 V vs RHE.
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                Author and article information

                Contributors
                Journal
                CHCOFS
                Chemical Communications
                Chem. Commun.
                Royal Society of Chemistry (RSC)
                1359-7345
                1364-548X
                February 01 2022
                2022
                : 58
                : 10
                : 1621-1624
                Affiliations
                [1 ]School of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China
                [2 ]College of Civil Engineering, Hebei University of Engineering, Handan 056038, China
                Article
                10.1039/D1CC04572E
                d8325f01-72ab-4938-8d91-122ab5c09390
                © 2022

                http://rsc.li/journals-terms-of-use

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