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Preparation of luminescent graphitic C3N4 NS and their composites with RGO for property controlling

机译：发光石墨C3N4 NS及其与RGO的复合材料的性能控制

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摘要

Thin graphitic C3N4 nanosheets (g-C3N4 NS) with bright blue photoluminescence were prepared through an acid and alkali corrosion and ultrasonic-assisted method. g-C3N4 NS/reduced graphene oxide (RGO) sample which was prepared through a hydrothermal synthesis offered high separation and transfer efficiency of photogenerated carriers because of the thin g-C3N4 NS attached closely to the RGO. The introduction of RGO sheets provided prominent advantages for enhanced light absorption and promoted the transfer rate of photogenerated carriers from g-C3N4 NS. A g-C3N4 NS/RGO (3 : 2) composite not only functions as a sensor to detect Pb2+ and Cd2+ in an aqueous solution but also exhibits efficient visible-light photocatalytic performance. The application in a sensor is ascribed to the intercalation impact between thin g-C3N4 NS and heavy metal ions. Owing to the presence of more active functional groups (e.g., carboxyl and amino groups) on the surface of the g-C3N4 NS compared with the bulk form, the ions can be easily adsorbed onto g-C3N4 NS. The g-C3N4 NS/RGO composites are highly sensitive and selective in ion sensing, as well as having superior photocatalytic activity.
机译：通过酸和碱腐蚀和超声辅助方法制备了具有亮蓝色光致发光的薄石墨C3N4纳米片（g-C3N4 NS）。通过水热合成制备的g-C3N4 NS /还原氧化石墨烯（RGO）样品提供了光生载流子的高分离和转移效率，这是因为稀薄的g-C3N4 NS紧密附着在RGO上。 RGO薄板的引入为增强光吸收提供了显着优势，并提高了g-C3N4 NS光生载流子的转移速率。 g-C3N4 NS / RGO（3：2）复合材料不仅充当传感器来检测水溶液中的Pb2 +和Cd2 +，而且还表现出有效的可见光光催化性能。传感器中的应用归因于g-C3N4 NS薄层与重金属离子之间的插层影响。由于与主体形式相比，g-C3N4 NS表面上存在更多的活性官能团（例如，羧基和氨基），因此离子很容易吸附到g-C3N4 NS上。 g-C3N4 NS / RGO复合材料在离子传感方面具有高灵敏度和选择性，并具有出色的光催化活性。

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