论文标题
hg（ii）在tio $ _2 $纳米管上的光催化减少和清除hg（ii）
Photocatalytic reduction and scavenging of Hg(II) over templated-dewetted Au on TiO$_2$ nanotubes
论文作者
论文摘要
金装饰的TIO $ _2 $纳米管用于水溶液中Hg（II）的光催化减排。相对于赤裸的TIO $ _2 $，脱湿的Au纳米颗粒的存在引起了光催化降低和清除性能的强烈增强。在存在氯化物的情况下，使用高度AU载荷的光催化剂来治疗10 ppm Hg（ii）溶液，观察到了由Au纳米颗粒产生的大规模形成的HG2CL2纳米线。 EDS和XPS证实了照片制作的纳米线的性质。在没有氯化物和/或较低Hg（II）的起始浓度下，清除汞通过形成HG-AU汞合金而进行。 24小时后观察到太阳光驱动的HG（II）减少90％。 ICP-MS分析表明，去除的Hg（II）积聚在光催化剂表面上。 Hg负载的排气光催化剂的再生很容易通过阳极剥离Hg（0）和Hg（i）为Hg（II）进行。四个催化再生周期后，仅观察到活性下降10％。
Gold-decorated TiO$_2$ nanotubes were used for the photocatalytic abatement of Hg(II) in aqueous solutions. The presence of dewetted Au nanoparticles induces a strong enhancement of photocatalytic reduction and scavenging performances, with respect to naked TiO$_2$. In the presence of chlorides, a massive formation of Hg2Cl2 nanowires, produced from Au nanoparticles, was observed using highly Au loaded photocatalysts to treat a 10 ppm Hg(II) solution. EDS and XPS confirmed the nature of the photo-produced nanowires. In the absence of chlorides and/or at lower Hg(II) starting concentrations, the scavenging of mercury proceeds through the formation of Hg-Au amalgams. Solar light driven Hg(II) abatements up to 90% were observed after 24h. ICP-MS analysis revealed that the removed Hg(II) is accumulated on the photocatalyst surface. Regeneration of Hg-loaded exhaust photocatalysts was easily performed by anodic stripping of Hg(0) and Hg(I) to Hg(II). After four catalytic-regeneration cycles only a 10% decrease of activity was observed.
