光催化
制氢
兴奋剂
过渡金属
材料科学
掺杂剂
氢
电子顺磁共振
无机化学
化学
催化作用
核磁共振
光电子学
生物化学
物理
有机化学
标识
DOI:10.1016/j.ijhydene.2003.04.001
摘要
In this paper, I present the photocatalytic hydrogen production by using transition metal ions-doped γ-Bi2O3 which is an oxide semiconductor having the band gap of 2.8eV.γ-Bi2O3 semiconductor was doped with various transition metal ions, Cr(VI), Fe(III), Co(II), Ni(II), Ru(III), Pd(II), etc., by the high-temperature sintering method and characterized by DRS, IR, SEM, TEM, XPS, and EPR. Photocatalytic hydrogen production was carried out by using methyl viologen as the electron relay by using xenon arc lamp as the light source. The photocatalytic hydrogen-production efficiency of the doped γ-Bi2O3 with the different dopants is found to be in the decreasing order: Pd(II)>Ru(III)>Co(II)>Ni(II)>Fe(III)>Cr(IV)>undopedγ-Bi2O3. Two factors seem to be responsible for the effect of transition metal ions ex. Schottky type of barrier and metal ions behave as microcathodes.
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