Visible-light detoxification and charge generation by transition metal chloride modified titania.
Visible-light detoxification and charge generation by transition metal chloride modified titania.
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DOI：
10.1002/(sici)1521-3765(20000117)6:2
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发表时间：
2000-01
期刊：
影响因子：
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通讯作者：
Ling Zang;W. Macyk;Christian Lange;W. Maier;Christina Antonius;D. Meissner;H. Kisch
中科院分区：
文献类型：
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作者：
Ling Zang;W. Macyk;Christian Lange;W. Maier;Christina Antonius;D. Meissner;H. Kisch
用溶胶凝胶法制备了PtIV、IrIV、RhIII、AuIII、PdII、CoII和NiII等氯化物修饰的非晶态微孔金属钛(AMM-Ti)，并用多种表面分析方法对其进行了表征。在可见光(波长=400或455 nm)或紫外光(波长=335 nm)的照射下，这些复合AMM-Ti粉末能够催化4-氯苯酚(4-CP)在水溶液中的光降解。初始速率取决于掺杂水平，在PtIV/AMM-Ti的情况下，当铂含量为3.0%时，初始速率最高。在光电化学电池中使用时，光电流的活性光谱向下延伸到约600 nm，4-CP的光降解也是如此。认为金属盐起氧化还原活性发色团的作用，将光生电荷传递给无定形基质。
Amorphous microporous metal oxides of titanium (AMM-Ti) modified with chlorides of PtIV, IrIV, RhIII, AuIII, PdII, CoII, and NiII have been prepared by the sol-gel method and characterized by various surface analytical methods. These hybrid AMM-Ti powders are catalysts for the photodegradation of 4-chlorophenol (4-CP) in aqueous solution when illuminated with visible (lambda > or = 400 or 455 nm) or UV (lambda > or = 335 nm) light. The initial rate depends on the dopant level and is highest at 3.0% Pt in the case of PtIV/AMM-Ti. When employed in a photoelectrochemical cell, the activity spectrum of the photocurrent extends downward to about 600 nm, as does the photodegradation of 4-CP. It is suggested that the metal salt acts as a redox-active chromophore, transmitting the photogenerated charges to the amorphous matrix.