The growing demand for environmentally friendly hydrogen peroxide (HO) production has fueled extensive research into synthesis strategy for photocatalysis though the use of the sunlight. However, the current challenge lies in the efficient production of photocatalysts without relying on sacrificial agents in the atmospheric environment. In this study, we propose a breakthrough approach to synthesize N, S co-doped carbon dots (N, S-CDs) by utilizing disulfide bonds in discarded shuttlecock waste and demonstrate its impressive performance (2062.4 µM gh) for photocatalytic HO production. The significance of the S-O functional groups in N, S-CDs is not limited to the structural elements, since it is not only the key adsorption site for oxygen, but also active site to promote electron transfer from the bulk phase to surface of N, S-CDs during the oxygen reduction reaction (ORR) process for photocatalytic HO production. Furthermore, femtosecond transient absorption spectroscopy (fs-TA) indicates that the presence of the S-O moiety is effective in prolonging the electron lifetime, which effectively inhibit the recombination of electron-holes, thus greatly improving carriers’ utilization. These findings provide new insight for the design of biomass carbon-based photocatalysts, which have important implications for the industrial application of solar energy for the synthesis of HO.

中文翻译：

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利用不稳定的 S-O 官能团作为羽毛球废物衍生的 N、S 掺杂碳点中的氧吸附和活性位点，高效光催化生产 H2O2


对环境友好的过氧化氢（H2O）生产的需求不断增长，推动了对利用阳光的光催化合成策略的广泛研究。然而，当前的挑战在于在不依赖大气环境中的牺牲剂的情况下高效生产光催化剂。在这项研究中，我们提出了一种突破性的方法，利用废弃羽毛球废物中的二硫键合成 N, S 共掺杂碳点 (N, S-CD)，并展示了其在光催化 H2O 生产方面的令人印象深刻的性能 (2062.4 µM gh)。 N、S-CDs中S-O官能团的重要性不仅限于结构元素，因为它不仅是氧的关键吸附位点，而且是促进电子从体相转移到N表面的活性位点， S-CD 在光催化 H2O 生产的氧还原反应 (ORR) 过程中。此外，飞秒瞬态吸收光谱（fs-TA）表明S-O部分的存在可以有效延长电子寿命，有效抑制电子-空穴的复合，从而大大提高载流子的利用率。这些发现为生物质碳基光催化剂的设计提供了新的见解，对太阳能合成H2O的工业应用具有重要意义。