نوع مقاله : مقاله علمی پژوهشی
نویسندگان
1 گروه شیمی‌فیزیک، دانشکده شیمی، دانشگاه تحصیلات تکمیلی علوم پایه زنجان، زنجان، صندوق پستی 66731-45137 ایران
2 دانشکده علوم شیمیایی، دانشگاه ناپلس فدریکو (II)، ناپولی، ایتالیا
3 مرکز ملی علوم مواد، ژاپن
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Hydrogen sulfide (H2S), a major issue in the sour oil and gas industries, is a highly corrosive and toxic gas produced on a large scale in these industries. Photocatalytic degradation of H2S with the aim of producing fuel is a novel and sustainable approach to solving the problem, supplying clean hydrogen fuel and eliminating this dangerous environmental pollutant. In this photon-based green strategy, the targeted design and easy synthesis of semiconducting energy materials are crucial from an applied standpoint. In this research, without consuming an external reducing agent, the adsorbing rGO/CoMn₂O₄ nanocomposite was synthesized through a one-pot hydrothermal route and employed to effectively produce hydrogen gas via photocatalytic splitting of an alkaline H₂S solution. XRD, FTIR, and Raman analyses showed that graphene oxide (GO) is reduced during the hydrothermal process without the need for a reducing additive. High-resolution transmission electron microscopy (HRTEM) investigations confirmed the attachment of the constituent particles of the composite. Bisulfide sorption studies revealed that the nanocomposite photocatalyst has a high capacity for adsorbing the reactant species (13.97 wt.%). BET, UV-Vis, and PL spectroscopic analyses showed that the presence of rGO in the nanocomposite increases the surface area of the photocatalyst, and by enhancing photon absorption and reducing electron-hole recombination, more hydrogen is generated. The rate of hydrogen release was 5217 (μmol H_2)/(g_cat.h), indicating the good performance of the synthesized nanocomposite photocatalyst for pollutant removal and conversion into clean fuel.
کلیدواژه‌ها [English]
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