标题： 金钻石纳米复合物在吸收可见光时高效生成水合电子 显示英文标题

标题： Gold diamond Nanocomposites Efficiently Generate Hydrated Electrons upon Absorption of Visible Light

摘要： 一种由可见光产生的高效水合电子源有可能对太阳能均相催化产生重大影响。 金刚石可能具有发射水合电子的高能力，但仅使用紫外光（lambda<225 nm）。 在本工作中，我们展示了由爆轰纳米金刚石和金纳米颗粒（AuNP@DNDs）组成的纳米复合材料对可见光的高效吸收，随后将电子释放到其悬浮的水环境中。 这是通过用可见激光光激发AuNP@DND并监测围绕720 nm处的水合电子瞬态吸收的出现和强度来实现的。 我们认为，这种机制是由于DND表面sp2杂化岛的等离子体增强可见光吸收而实现的。 优化此过程可能会在能源密集型反应的太阳能光催化方面取得重要突破，例如N2和CO2还原，并为废水管理和纳米医学应用提供一种无毒的水合电子源。 显示英文摘要

摘要： An efficient source of hydrated electrons generated by visible light has the potential to have a major impact on solar homogeneous catalysis. Diamond has potentially a high capability of emitting hydrated electrons, but only using ultraviolet light (lambda<225 nm). In this work, we demonstrate the efficient absorption of visible light by nanocomposites consisting of detonation nanodiamonds and gold nanoparticles (AuNP@DNDs), which subsequently emit electrons into the aqueous environment in which they are suspended. This has been done by exciting the AuNP@DND with visible laser light and monitoring the appearance and intensity of the transient absorption of hydrated electrons centered at around 720 nm. We suggest that this mechanism is made possible by the plasmonic enhancement of visible absorption by sp2-hybridized islands on the DND surface. Optimization of this process could lead to important breakthroughs in solar photocatalysis of energy-intensive reactions such as N2 and CO2 reduction as well as providing a non-toxic source of hydrated electrons for applications in wastewater management and nanomedicine.