Turnip-inspired BiVO4/CuSCN nanostructure with close to 100% suppression of surface recombination for solar water splitting

摘要: Abstract Inspired by the morphologies and function of root stalk a turnip, which has evolved with unique pattern growth for enhancing transport phenomenon, novel architecture BiVO4/CuSCN is fabricated on fluorine-doped tin oxide coated glass initially fabricating bulky BiVO4 film (the root) subsequently depositing p-type CuSCN nanorods stalk). With creation nanorod heterojunction photoanodes, photocurrent density increases to 1.78 mA cm−2 compared 1.22 mA cm−2 bare at 1.23 V vs. reversible hydrogen electrode. More importantly, onset potential oxygen evolution reaction exhibits dramatic cathodic shift (~ 230 mV). The also possesses internal quantum efficiency approximately 50% in range from 350 450 nm relatively high solar energy conversion (0.5%) much higher oxidation 90%). electrode design favoring simple water splitting process over conventionally providing more active sites facilitates transportation consumption photoinduced holes could open up new route high-efficiency photoanodes.