Instituto Politécnico Nacional, CICATA Legaria, Legaria 694, Colonia Irrigación, CP 11500, Ciudad de México, Mexico.
Instituto Politécnico Nacional, CICATA Legaria, Legaria 694, Colonia Irrigación, CP 11500, Ciudad de México, Mexico.
J Environ Manage. 2019 Feb 15;232:305-309. doi: 10.1016/j.jenvman.2018.11.044. Epub 2018 Nov 26.
In this work, we demonstrate for the first time that Thermal Lens Microscopy technique (TLM) can be applied to monitor the dynamics of a photocatalytic process in-situ. The photocatalytic reduction of hexavalent chromium -Cr(VI)- in aqueous solution using CdS and irradiated with visible light is monitored by TLM. Since the values of Cr(VI) concentration obtained after the photocatalytic process were close to those imposed by the international regulations for drinking water, the use of TLM allowed its measurement with a better reliability than with UV spectroscopy, usually used in this kind of analysis.
在这项工作中，我们首次证明了热透镜显微镜技术（TLM）可用于原位监测光催化过程的动力学。使用 TLM 监测了在可见光照射下用 CdS 将六价铬（Cr(VI)）在水溶液中还原的光催化过程。由于光催化后获得的 Cr(VI)浓度值接近国际饮用水规定的浓度值，因此与通常用于此类分析的紫外光谱法相比，TLM 的使用可以更可靠地对其进行测量。
