Silver nanoparticles (Ag NPs), widely used as photocatalysts, exhibit low photocatalytic activity due to their serious aggregation and difficulty in separation for recycling. To solve these problems, a highly efficient and stable photocatalysis system was designed by immobilizing Ag NPs on a macroporous polymer resin with conjugated side-chains (denoted as Ag@sulfamide-resin). A macroporous polymer resin with conjugated side-chains (named sulfamide-resin) was constructed by grafting 4′-(p-ethanediamine phenyl)-2,2′:6′,2′′-terpyridine (TE) to polystyrene-based macroporous resin via sulfamide bond formation. The photocatalytic activity of Ag@sulfamide-resin was evaluated via the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) as a model reaction. Ag@sulfamide-resin exhibits excellent photocatalytic activity and stability, and the catalytic activity of Ag@sulfamide-resin under light irradiation was found to be 3.97 and 15.1 times those of Ag@sulfamide-resin in the dark and Ag@macroporous-resin under light irradiation, respectively. The higher photocatalytic activity was attributed to the fact that sulfamide resin can absorb broad wavelength light and easily transfer photogenerated electrons to Ag NPs; the abundant “N” atoms in this resin can act as anchoring sites for Ag NPs to prevent their aggregation and loss; and Ag NPs display smaller sizes of 2–3 nm. The macroporous polymer resin with conjugated side-chains may be a prospective material as a support for designing an efficient photocatalyst.

中文翻译：

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具有共轭侧链的大孔聚合物树脂：用于制备光催化剂的高效银纳米颗粒载体

广泛用作光催化剂的银纳米颗粒（Ag NPs）由于其严重的聚集和难以回收再利用而表现出较低的光催化活性。为了解决这些问题，通过将AgNPs固定在具有共轭侧链的大孔聚合物树脂上（称为Ag @磺酰胺树脂），设计了一种高效且稳定的光催化系统。通过将4'-（对乙二胺苯基）-2,2'：6'，2''-吡啶（TE）接枝到聚苯乙烯基大孔上来构建具有共轭侧链的大孔聚合物树脂（称为磺酰胺树脂）通过磺酰胺键形成树脂。Ag @磺酰胺树脂的光催化活性通过作为模型反应，将4-硝基苯酚（4-NP）还原为4-氨基苯酚（4-AP）。Ag @磺酰胺树脂表现出优异的光催化活性和稳定性，在光照射下，Ag @磺酰胺树脂的催化活性分别是黑暗条件下的Ag @磺酰胺树脂的3.97倍和15.1倍下的Ag @大孔树脂的15.1倍。分别照射。较高的光催化活性归因于以下事实：磺酰胺树脂可以吸收宽波长的光，并易于将光生电子转移到Ag NPs上。该树脂中大量的“ N”原子可充当Ag NP的锚定位，以防止其聚集和损失；Ag NPs显示较小的2–3 nm尺寸。具有共轭侧链的大孔聚合物树脂可以是预期材料，作为设计有效的光催化剂的载体。