No abstract

No abstract

AgY, CeY, and AgCeY zeolites were successfully prepared and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), thermogravimetry−differential thermogravimetry (TG-DTG), and Fourier transform infrared (FT-IR) spectroscopy. The adsorptive desulfurization properties of the adsorbents were evaluated in a fixed-bed unit through different types of model gasoline. The results showed that the AgCeY zeolite has a high desulfurization capacity, similar to that of AgY, and the adsorption affinity for sulfur compounds from model gasoline has the following order: benzothiophene > thiophene. In addition, AgCeY zeolite also has a high selectivity similar to CeY, and the effect on the zeolites for sulfur removal ranks in the following order: pyridine > cyclohexene > toluene. The AgCeY zeolite removes organic sulfur compounds by two types of adsorption modes: π-complexation and direct coordination (S-M) interaction.

Among various kinds of photocatalytic semiconductors, graphitic carbon nitride (g-C 3 N 4 )-based photocatalysts have become the most attractive "celebrity" because of their stable chemical properties, appropriate band structure, and facile synthesis. Here, we provide a systematic review of g-C 3 N 4based photocatalytic materials based on the latest related research progress. The design ideas and preparation methods of g-C 3 N 4based photocatalysts are summarized, including morphology control of a three-dimensional structure, active site engineering, defect/vacancy engineering, and interface engineering. In addition, the typical applications of g-C 3 N 4 -based photocatalysts are also discussed in detail, involving water splitting (overall water splitting, H 2 evolution, O 2 evolution), organic transformation reactions (oxidation reaction, reduction reaction, coupling reaction), and degradation of organic pollutants. This perspective ends with a summary and perspectives on facing the challenges and directions of future development in this research field.

No abstract