Noble-Metal-Free NOx Storage over Ba-Modified TiO2 Photocatalysts under UV-Light Irradiation at Low Temperatures
Noble-Metal-Free NOx Storage over Ba-Modified TiO2 Photocatalysts under UV-Light Irradiation at Low Temperatures
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DOI：
10.1021/acscatal.5b00151
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发表时间：
2015-04
期刊：
影响因子：
12.9
通讯作者：
A. Yamamoto;Yuto Mizuno;K. Teramura;S. Hosokawa;Tsunehiro Tanaka
中科院分区：
文献类型：
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作者：
A. Yamamoto;Yuto Mizuno;K. Teramura;S. Hosokawa;Tsunehiro Tanaka
在高浓度NO（200 ppm）和高气时空速（GHSV）（50 000 h-1）条件下，研究了Ba/TiO 2光催化剂在紫外光照射下对NOx的光辅助存储.在Ba/TiO 2光催化剂上，从反应开始的1020 s间隔期间，NO去除效率保持在>99%。程序升温脱附（TPD）测试和X射线衍射（XRD）技术表明，氧化钡（BaO）物种在低温下也能作为NOx存储材料，从而提高了光辅助NOx存储的性能。
Photoassisted nitrogen oxide (NOx) storage was investigated over the barium-modified titanium dioxide (Ba/TiO2) photocatalysts under UV-light irradiation at a high concentration of nitrogen monoxide (NO) of 200 ppm and a high gas hourly space velocity (GHSV) of 50 000 h–1. The NO removal efficiency was kept >99% during the 1020 s interval from the start of the reaction over the Ba/TiO2 photocatalyst. The temperature-programed desorption (TPD) measurement and X-ray diffraction (XRD) technique revealed that barium oxide (BaO) species functioned as a NOx storage material even at low temperatures, which result in improvement of the performance of the photoassisted NOx storage.