Almazroai Layla S, El-Mekawy Rasha E
Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University Makkah Saudi Arabia
Department of Petrochemicals, Egyptian Petroleum Research Institute Nasr City Cairo Egypt.
RSC Adv. 2019 Aug 8;9(43):24670-24681. doi: 10.1039/c9ra04696h.
The production of hydrogen as an alternative fuel is a major challenge for developed countries. To achieve this, photocatalysis is a promising method, which depends mainly on a renewable energy source, namely, the sun. Many derivatives of cyanine-sensitized Cu/TiO were prepared and characterized by XRD, SEM-EDS, TEM, BET surface area and UV-vis spectrophotometry and their photocatalytic activity was studied. The study of hydrogen production over the sensitized photocatalysts confirmed the significant role of the dyes in the enhancement of hydrogen production. Dye molecules harness light radiation to produce strong oxidizing species, such as hydroxyl radicals, which in turn form hydrogen molecules. Combining sonolysis with photocatalysis processes proved that ultrasound waves inhibit the agglomeration of particles and maintain their surface area. This synergetic process increased the efficiency of hydrogen production by 7 times using photocatalysis only.
将氢气作为替代燃料进行生产，对发达国家来说是一项重大挑战。要实现这一目标，光催化是一种很有前景的方法，它主要依赖于一种可再生能源，即太阳能。制备了许多花青敏化的Cu/TiO衍生物，并通过X射线衍射（XRD）、扫描电子显微镜-能谱分析（SEM-EDS）、透射电子显微镜（TEM）、比表面积分析仪（BET）和紫外可见分光光度法对其进行了表征，并研究了它们的光催化活性。对敏化光催化剂上氢气生成的研究证实了染料在提高氢气产量方面的重要作用。染料分子利用光辐射产生强氧化性物质，如羟基自由基，进而形成氢分子。将声化学分解与光催化过程相结合，证明超声波可抑制颗粒团聚并保持其表面积。这种协同过程使仅使用光催化时的产氢效率提高了7倍。
