光催化
异质结
制氢
材料科学
可见光谱
光电效应
分解水
化学工程
试剂
氢
光化学
结晶度
光电子学
纳米技术
催化作用
化学
复合材料
物理化学
有机化学
工程类
作者
Jum Suk Jang,Suk Jun Hong,Jae Yul Kim,Jae Sung Lee
标识
DOI:10.1016/j.cplett.2009.05.012
摘要
A heterojunction photocatalyst TiO2/AgGaS2 consisting of bulky AgGaS2 with high crystallinity decorated with nanosized TiO2 particles was successfully fabricated by solid state reaction and sol–gel synthesis. TiO2 itself was inactive under visible light, but its combination with AgGaS2 improved greatly the rate of hydrogen production of AgGaS2 from water containing Na2S/Na2SO3 as sacrificial reagents under visible light irradiation. The fabrication method of the heterojunction photocatalysts was critical for their performance. This configuration of photocatalyst results in an efficient charge separation at the interface, followed by fast diffusion of photoelectrons generated in AgGaS2 towards surrounding TiO2 leading to high photocatalytic activity of hydrogen production.
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