Interface Analysis Centre, Oldbury House, 121 St. Michael's Hill, Bristol BS2 8BS, United Kingdom.
J Hazard Mater. 2012 Apr 15;211-212:247-54. doi: 10.1016/j.jhazmat.2011.09.026. Epub 2011 Sep 14.
The photocatalytic reduction of carbon dioxide (CO(2)) on jet spray formed titanium dioxide (TiO(2)) was studied using light-emitting diode (LED) illumination centred at a wavelength of 388 nm. In addition, the photocatalytic reduction of CO(2) under soft X-ray irradiation was also studied. Specifically, the experiments examined the reduction of CO(2) in a gaseous and liquid-gas system using residual gas analysis mass spectrometry. A photochemical reduction of CO(2) was observed over a course of 250 min, with transformation to a major product, C(2)H(3)O(-) (ethenolate), until equilibrium was reached. The product was observed to be surface stabilised, with it reverting back to CO(2) over the course of 100 min without illumination. A proposed free radical mechanism is presented for the formation of this product. A similar effect to that of UV illumination is also observed to occur under the influence of soft X-rays, which presents a potentially significant alternative method for the activation of TiO(2).
采用发光二极管（LED）以 388nm 波长为中心进行照射，研究了二氧化碳（CO2）在喷射成型二氧化钛（TiO2）上的光催化还原。此外，还研究了软 X 射线照射下 CO2 的光催化还原。具体而言，实验使用残余气体分析质谱法研究了在气态和气液系统中 CO2 的还原。在 250 分钟的过程中观察到 CO2 的光化学还原，直到达到平衡时转化为主要产物 C2H3O-（乙烯酸盐）。观察到产物在表面稳定，在没有光照的情况下，经过 100 分钟后会重新回到 CO2。提出了一种自由基机制来解释该产物的形成。还观察到软 X 射线的影响类似于紫外光照射，这为 TiO2 的激活提供了一种潜在的重要替代方法。
