biostudies-literatureZhang JTianjin UniversityNatural Science Foundation of Tianjin CityMinistry of Education of the People&apos;s Republic of ChinaNational Natural Science Foundation of China6381-6386https://www.ebi.ac.uk/biostudies/studies/S-EPMC5356035biostudies-literatureUnknown7(10)Most Bi-based photoelectrodes have suitable band gaps and can effectively promote the water oxidation reaction. However, simple preparation methods for Bi-based binary metal oxides as photoanodes are scarce. This paper describes a simple hydrothermal anion exchange method to synthesize Bi-based binary metal oxides with controlled morphologies. This synthesis process uses BiOI as the template and Bi source, which is eventually converted to Bi-based porous nanoflake photoanodes upon reaction with MO _<i>x</i> (M = W, V, and Mo)-containing precursors. The photoanodes show well-shaped porous nanoflake morphologies and exhibit impressive photoelectrochemical properties compared to Bi-based photoanodes synthesized by conventional methods. These three samples possess long-term stabilityChemical scienceFabrication of porous nanoflake BiMO _<i>x</i> (M = W, V, and Mo) photoanodes <i>via</i> hydrothermal anion exchange.PMC5356035U146320513JCYBJC370002012003211002420130032120018215256265130218560303002Zhang JWang TLi AGong JChang XfalseFabrication of porous nanoflake BiMO _<i>x</i> (M = W, V, and Mo) photoanodes <i>via</i> hydrothermal anion exchange.Most Bi-based photoelectrodes have suitable band gaps and can effectively promote the water oxidation reaction. However, simple preparation methods for Bi-based binary metal oxides as photoanodes are scarce. This paper describes a simple hydrothermal anion exchange method to synthesize Bi-based binary metal oxides with controlled morphologies. This synthesis process uses BiOI as the template and Bi source, which is eventually converted to Bi-based porous nanoflake photoanodes upon reaction with MO _<i>x</i> (M = W, V, and Mo)-containing precursors. The photoanodes show well-shaped porous nanoflake morphologies and exhibit impressive photoelectrochemical properties compared to Bi-based photoanodes synthesized by conventional methods. These three samples possess long-term stability2016-01-01T00:00:00Z2016 Oct2025-05-29T19:21:23.661Z2025-05-29T19:21:23.661ZS-EPMC53560352845109310.1039/c6sc01803c