Visible-light-induced oxidative removal of nitrogen oxides in air by metal chloride-modified titanium (IV) oxide nanoparticles
Visible-light-induced oxidative removal of nitrogen oxides in air by metal chloride-modified titanium (IV) oxide nanoparticles
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DOI：
10.1163/156856708784795626
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发表时间：
2008-05
影响因子：
3.3
通讯作者：
H. Kominami;Katutoshi Sumida;Kazuto Yamamoto;Nobuaki Kondo;K. Hashimoto;Y. Kera
中科院分区：
文献类型：
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作者：
H. Kominami;Katutoshi Sumida;Kazuto Yamamoto;Nobuaki Kondo;K. Hashimoto;Y. Kera
通过将金属氯化物负载在具有大比表面积的商用 TiO2 纳米颗粒（Ishihara ST-01）上制备了各种金属氯化物改性的氧化钛（TiO2）（MCMT）样品，并用于在可见光和/或紫外（UV）光照射下光诱导氧化去除空气中的氮氧化物（NOx）。在带有紫外截止滤光片的蓝色荧光灯（BFL）光照射下，MCMT样品的NOx去除活性按以下顺序降低：RhCl3/ST-01>H2PtCl6/ST-01>RuCl3/ST-01>ST-01>IrCl4/ST-01>HAuCl4/ST-01，表明RhCl3.固定在 TiO2 上的 H2PtCl6 和 RuCl3 可以有效地作为光敏剂去除 NOx。在用 BFL 或蓝色发光二极管光照射的 RhCl3/ST-01 上，NOx 几乎被定量固定为硝酸盐。在白色荧光灯的可见光和紫外光照射下，RhCl3/ST-01比裸露的ST-01表现出更高的NOx去除水平和更低的二氧化氮释放水平，表明RhCl3/ST-01有效地利用了可见光和紫外光，并且在RhCl3/ST-01上发生了两种类型的反应（固定RhCl3的光敏化和TiO2的光催化）。
Various metal chloride-modified titanium(IV) oxide (TiO2) (MCMT) samples were prepared by loading metal chloride on commercial TiO2 nanoparticles (Ishihara ST-01) having a large specific surface area and used for photoinduced oxidative removal of nitrogen oxides (NOx) in air under irradiation of visible light and/or ultraviolet (UV) light. The NOx removal activity of MCMT samples under photoirradiation from a blue fluorescent lamp (BFL) with a UV cut filter decreased in the following order: RhCl3/ST-01>H2PtCl6/ST-01>RuCl3/ST-01>ST-01>IrCl4/ST-01>HAuCl4/ST-01, indicating that RhCl3. H2PtCl6 and RuCl3 fixed on TiO2 effectively worked as photosensitizers for NOx removal. NOx was almost quantitatively fixed as nitrate on RhCl3/ST-01 photoirradiated with BFL or blue light-emitting diodes. Under irradiation of both visible light and UV light from a white fluorescent lamp, RhCl3/ST-01 exhibited a higher level of removal of NOx and a much lower level of release of nitrogen dioxide than did bare ST-01, indicating that RhCl3/ST-01 effectively utilized both visible light and UV light and that two types of reaction (photosensitization by fixed RhCl3 and photocatalysis by TiO2) occurred over RhCl3/ST-01.