Department of Environmental Studies, Institute of Graduate Studies and Research, Alexandria University, Alexandria, 21526, Egypt.
Chemical Engineering Department, Faculty of Engineering, Port Said University, Port Said, Egypt.
Environ Sci Pollut Res Int. 2021 Jul;28(27):36157-36173. doi: 10.1007/s11356-021-13090-7. Epub 2021 Mar 9.
This study aims at examining the use of an advanced meso-scale continuous-flow photochemical reactor for the photocatalytic conversion of CO with water into fuel over TiO (P25), Ag/TiO, and Ag/TiO/RGO catalysts. The silver loaded photocatalysts were prepared by one-step process via hydrothermal method. The prepared photocatalysts were characterized by various characterization techniques in order to identify the morphological, chemical, physical, and optical properties. The photocatalytic activity of the as-prepared catalysts was firstly examined by the photoelectrochemical (PEC) measurements and secondly by the photocatalytic reduction of CO in the proposed setup. Liquid products were analyzed using gas chromatography-mass spectrometry (GC-MS) and total organic carbon (TOC) techniques. It was found that the ternary composite revealed an outstanding performance towards CO photocatalytic reduction, where its selectivity was directed towards methanol production. The incorporation of graphene nanosheets enhanced the photocatalytic reduction of CO by 3.3 and 9.4 times compared with Ag/TiO and bare TiO, respectively, using the proposed photochemical reactor in a continuous mode. This study sheds the light on a novel type of a photocatalytic reactor where CO conversion over Ag/TiO/RGO ternary composite was evaluated. A meso-scale continuous-flow photochemical reactor.
本研究旨在考察使用先进的中尺度连续流动光化学反应器，在 TiO(P25)、Ag/TiO 和 Ag/TiO/RGO 催化剂上，通过水将 CO 光催化转化为燃料。银负载光催化剂通过水热法一步法制备。通过各种表征技术对所制备的光催化剂进行了表征，以确定其形态、化学、物理和光学性质。首先通过光电化学（PEC）测量，其次通过在提出的装置中光催化还原 CO，对所制备催化剂的光催化活性进行了检查。使用气相色谱-质谱（GC-MS）和总有机碳（TOC）技术分析液体产物。结果发现，三元复合材料在 CO 光催化还原方面表现出优异的性能，其选择性指向甲醇的生成。与 Ag/TiO 和 bare TiO 相比，在连续模式下使用所提出的光化学反应器，石墨烯纳米片的掺入分别将 CO 的光催化还原增强了 3.3 倍和 9.4 倍。本研究揭示了一种新型的光催化反应器，在该反应器中评估了 Ag/TiO/RGO 三元复合材料对 CO 的转化。中尺度连续流动光化学反应器。
