P-type semiconductivity has been observed in solid solution series(SrTiO_(3))_(1-x)(CaCr_(0.5)Nb_(0.5)O_(3))x(0.0≤x≤0.15),which all adopt cubic symmetry and own intense absorption in the visible light region.These s...P-type semiconductivity has been observed in solid solution series(SrTiO_(3))_(1-x)(CaCr_(0.5)Nb_(0.5)O_(3))x(0.0≤x≤0.15),which all adopt cubic symmetry and own intense absorption in the visible light region.These solid solutions are superior H2 evolution photocatalysts under visible light illumination(λ≥400 nm).An AQE as high as 1.02%at 420±20 nm has been achieved at optimal composition(SrTiO_(3))_(0.85)(CaCr_(0.5)Nb_(0.5)O_(3))0.15 which significantly surpasses the parent compounds.Stoichiometric H_(2)/O_(2) production under visible light illumination has been successfully realized using Z-scheme system containing(SrTiO_(3))_(0.85)(CaCr_(0.5) Nb_(0.5) O_(3))_(0.15),WO_(3) and I^(-)/IO_(3)^(-)redox couple.展开更多
基金the National Natural Science Foundation of China(Grant No.51972233)Natural Science Foundation of Shanghai(Grant No.19ZR1459200)+1 种基金Shanghai Science and Technology Commission(14DZ2261100)the Fundamental Research Funds for the Central Universities for funding。
文摘P-type semiconductivity has been observed in solid solution series(SrTiO_(3))_(1-x)(CaCr_(0.5)Nb_(0.5)O_(3))x(0.0≤x≤0.15),which all adopt cubic symmetry and own intense absorption in the visible light region.These solid solutions are superior H2 evolution photocatalysts under visible light illumination(λ≥400 nm).An AQE as high as 1.02%at 420±20 nm has been achieved at optimal composition(SrTiO_(3))_(0.85)(CaCr_(0.5)Nb_(0.5)O_(3))0.15 which significantly surpasses the parent compounds.Stoichiometric H_(2)/O_(2) production under visible light illumination has been successfully realized using Z-scheme system containing(SrTiO_(3))_(0.85)(CaCr_(0.5) Nb_(0.5) O_(3))_(0.15),WO_(3) and I^(-)/IO_(3)^(-)redox couple.
