Department of Civil & Environmental Engineering, Yonsei University, Seoul, 03722, Republic of Korea.
Department of Civil & Environmental Engineering, Yonsei University, Seoul, 03722, Republic of Korea; Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, TX, 77843-3136, USA.
Chemosphere. 2022 Dec;308(Pt 2):136350. doi: 10.1016/j.chemosphere.2022.136350. Epub 2022 Sep 9.
This study demonstrates the first reported thermocatalytic oxidation of an indoor volatile organic compound (VOC), acetaldehyde, by harnessing the waste-heat energy from indoor light sources (e.g., halogen lamps) without additional energy inputs. With an optimal Pt-TiO catalyst, the designed catalyst-coated lampshade was successfully activated under waste-heat energy (∼120 °C) and achieved the complete mineralization of CHCHO into CO (k = 0.02 min). The catalytic activity of Pt-TiO was extremely dependent on its preparation method which greatly influenced the characteristics (e.g., oxidation state and size) of Pt. The thermocatalytic oxidation mechanism of CHCHO over Pt-TiO was investigated, which revealed that O and HO sources play vital roles. Although Pt is an expensive noble metal, the thermocatalytic process on the Pt-TiO-coated lampshade without additional energy, along with its outstanding activity, can offset the high material cost. The proposed strategy offers a sustainable and feasible method for the degradation of indoor VOCs.
本研究利用室内光源（如卤素灯）的余热能源，无需额外的能量输入，首次实现了室内挥发性有机化合物（VOC）乙醛的热催化氧化。使用最佳的 Pt-TiO 催化剂，设计的涂覆有催化剂的灯罩在余热能源（约 120°C）下成功激活，并将 CHCHO 完全矿化为 CO（k=0.02 min）。Pt-TiO 的催化活性极大地取决于其制备方法，这极大地影响了 Pt 的特性（例如氧化态和粒径）。研究了 Pt-TiO 上 CHCHO 的热催化氧化机理，结果表明 O 和 HO 源起着至关重要的作用。虽然 Pt 是一种昂贵的贵金属，但在没有额外能量的情况下，涂覆有 Pt-TiO 的灯罩进行的热催化过程以及其出色的活性，可以抵消高材料成本。该策略为室内 VOCs 的降解提供了一种可持续且可行的方法。
