Abstract

The hydrolysis of K₂[PtCl₄] under visible light, the equilibrium, morphology, and size of Pt NPs combined with CDs, the valence states of Pt element and the bonding of Pt NPs with CDs, the influence of different kinds of cyclodextrin (α, β, γ-CDs), the acidity of the solution, and the visible light color on the catalytic ability of Pt NPs were all researched by typical approaches. All results prove visible light irradiation is effectively playing a key role in the reaction process to form Pt NPs in a very narrow size distribution. pH = 9, β-CDs, and purple visible light are the optimized reaction conditions. The Pt-CDs present a high rate constant of 0.88 min⁻¹ in the catalytic reduction of 4-NP. This research is beneficial for expanding photochemical approaches from ultraviolet light to visible light, which is more of green chemistry, low cost, and facile.

摘要

K ₂ [PtCl ₄ ]在可见光下的水解，与CD结合的Pt NP的平衡，形态和大小，Pt元素的价态以及Pt NP与CD的键合，不同种类环糊精的影响（ α，β，γ-CDs），溶液的酸度以及可见光颜色对Pt NPs催化能力的影响均已通过典型方法进行了研究。所有结果证明可见光辐照在形成非常窄的尺寸分布的Pt NPs的反应过程中有效地发挥了关键作用。pH = 9，β-CD和紫色可见光是优化的反应条件。Pt-CD在催化还原4时呈现0.88 min ^-1的高速率常数-NP。这项研究有益于将光化学方法从紫外光扩展到可见光，这是绿色化学，低成本且容易实现的。