overall water splitting under visible light by BiVO4- MoS2

سال انتشار: 1398
محل انتشار: دومین کنفرانس کاتالیست انجمن شیمی ایران
کد COI اختصاصی: ICCO02_001
زبان مقاله: انگلیسی
تعداد مشاهده: 405

نویسندگان

Department of Sharif University of Technology, Tehran, IRAN

چکیده

In this Article, BiVO4 and MoS2 were synthesized by hydrothermal method. A one-pot hydrothermal method was also used to synthesize BiVO4- MoS2 p–n heterojunction composite. The reaction of oxygen production, the process of water oxidation in the presence of heterogeneous nanocatalysts, MoS2, BiVO4, BiVO4-MoS2, have been investigated The BiVO4 and MoS2 percentages were also analyzed and the optimum percentage was found to be 60:40. Characterization of these nanocatalysts was performed using FT-IR , method. Also, repeatability and recycling of the tests were investigated. Water decomposition using a nanophotocatalyst and visible light can be considered as an easy solution for oxygen evolution. In many cases, water oxidation is essential, for example, in the development of oxygen in synthetic or natural photosynthesis. In this project, production of hydrogen from renewable sources occurs as well as oxygen[1]. Therefore, the amount of O2 produced from water splitting utilizing MoS2, BiVO4 and BiVO4-MoS2 composite The reasons for using this composite are non-toxicity, cheapness, abundance of raw materials, good accountability and high chemical stability[2]. Photocatalytic testing of water splitting was done in a Pyrex cell with a capacity of 250 ml. Taking 0.1g of as-prepared catalyst in 200 mL distilled water. As BiV??4- MoS2 (50:50) is insoluble in water, the water-catalyst mixture was stirred magnetically to ensure that catalyst remained suspended. Five LED of 60 W were used as light sources. The amount of water oxygen by flowing argon gas through the water becomes zero. Oxygen meter was placed in solution and the amount of oxygen was measured at specified time. The production of Hydrogen by this catalyst is excellent and fast in comparison to others. Finally, 53 micromoles of oxygen and 750 micromoles were produced. The reusability of the catalyst indicating the stability of the catalyst.

کلیدواژه ها

Water splitting ،Nanocatalysis ،BiVO4،MoS2 ،Oxygen evolution

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