光催化
离子
金属
水溶液
水溶液中的金属离子
辐照
氧化物
材料科学
氧化还原
钛
无机化学
电子
分析化学(期刊)
化学
物理化学
催化作用
冶金
生物化学
有机化学
色谱法
量子力学
核物理学
物理
作者
Kazunori Sato,Yuhei Hoshi,Jirachaya Ayawanna,Teoh WahTzu,Nobuo Saito,Yasunobu Inoue,Hiroshi Nishiyama
出处
期刊:Meeting abstracts
日期:2014-08-05
卷期号:MA2014-02 (8): 600-600
标识
DOI:10.1149/ma2014-02/8/600
摘要
In order to remove hazardous heavy metal ions dissolved in an aqueous environment, the photoelectrodeposition effect on the removal of Pb(II), Cu(II), Cd(II), and Zn(II) ions has been investigated for the (CeO 2 ) 1-X (Ln 2 O 3 ) X (Ln = La, Sm, Gd) photocatalyst oxide particles combined with fine α-FeOOH particles. This effect is also compared with titanium-based oxides. The mixture of 1 mol%α-FeOOH and these photocatalyst oxides showed a high photoelectrodeposition ability particularly for Pb(II) ions under photo irradiation. The removal efficiency of Pb(II) ions was high under the UV irradiation and it decrased with increasing the wavelength of light toward the visible region. This result indicates that the coexistence of fine α-FeOOH particles with (CeO 2 ) 1-X (Ln 2 O 3 ) X particles contributes to an efficient separation of holes and electrons generated by the photo irradiation. The high-resolution scanning electron microscopic observation of the samples revaled that fine α-FeOOH particles supported on the surface of the photocatalyst oxide particles are effective for the charge separation between holes and electrons. This effect is caused by the redox reaction occurring for the transfer of electrons to the surface of α-FeOOH-(CeO 2 ) 1-X (Ln 2 O 3 ) X particles. These composite particles were also found to be effective for the removal of other heavy ions at low concentrations. The removal efficiency of the heavy metal ions is determined by the standard electrode potential of elements involved.
科研通智能强力驱动
Strongly Powered by AbleSci AI