Synthesis and visible-light photocatalytic N2/H2O to ammonia at atmospheric pressure and room temperature is considered to be the most ideal ammonia synthesis technology. In this study, coal-based carbon dots (CDs) were prepared by H2O2 oxidation method using cheap and ubiquitous coal as the carbon source. Then the gold sol was connected to CDs to obtain a core-shell structure photocatalyst Au@CDs by sodium borohydride (NaBH4) reduction method. While characterizing the material structure, the photocatalytic N2/H2O to ammonia performance of Au@CDs was investigated. The results show that the introduction of CDs in Au @CDs photocatalysts can not only improve the performance of the catalyst to excite carriers in visible light, but also inhibit the recombination of photogenerated electron-hole pairs, promote the charge transport ability and make photogenerated electrons and holes move smoothly to the catalyst surface. Meanwhile, the adsorption and dissociation capacity of N2 on the catalyst surface can be improved, thereby the photocatalytic N2/H2O ammonia synthesis reaction of Au@CDs can proceed smoothly.

中文翻译：

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Au@CDs核壳纳米催化剂的合成及可见光光催化N2/H2O制氨

合成及可见光光催化N2/H2常压常温下O制氨被认为是最理想的氨合成技术。在这项研究中，煤基碳点 (CDs) 由 H 制备2○2使用廉价且普遍存在的煤作为碳源的氧化方法。然后将金溶胶与CDs连接，通过硼氢化钠（NaBH2）获得核壳结构光催化剂Au@CDs4) 还原法。在表征材料结构的同时，光催化 N2/H2研究了 Au@CDs 的 O 对氨的性能。结果表明，在Au@CDs光催化剂中引入CDs不仅可以提高催化剂在可见光下激发载流子的性能，而且可以抑制光生电子-空穴对的复合，促进电荷传输能力，使光生电子产生。和孔平滑地移动到催化剂表面。同时，N 的吸附解离能力2可以改善催化剂表面上的光催化 N2/H2Au@CDs的O氨合成反应可以顺利进行。