Occlusion of Diblock Copolymer-Modified Gold Nanoparticles Generates Diabolo-Shaped Au@ZnO Nanocomposite Crystals with Enhanced Photocatalytic Properties
Occlusion of Diblock Copolymer-Modified Gold Nanoparticles Generates Diabolo-Shaped Au@ZnO Nanocomposite Crystals with Enhanced Photocatalytic Properties
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DOI：
10.1021/acs.chemmater.2c00161
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发表时间：
2022-04
影响因子：
8.6
通讯作者：
Yingxiang Dong;Ziqing Liu;Yin Ning;S. Armes;Dan Li
中科院分区：
文献类型：
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作者：
Yingxiang Dong;Ziqing Liu;Yin Ning;S. Armes;Dan Li
双亲水性嵌段共聚物已被广泛用作调节无机晶体在水介质中生长的添加剂。然而，目前还没有报道如何双亲水性嵌段共聚物修饰的纳米粒子的影响，这种晶体的形态，结构和性能。本文中，通过可逆加成-断裂链转移聚合制备了定义明确的聚（甲基丙烯酸2-硫酸根合乙酯铵）-聚（单甲基丙烯酸甘油酯）二嵌段共聚物，然后通过其二硫代苯甲酸酯端基吸附到金纳米颗粒表面以形成空间稳定的纳米颗粒。氧化锌（ZnO）晶体的生长在这种纳米粒子的存在下，导致其闭塞，生产Au@ZnO纳米复合晶体具有显着的空竹形态。此外，这种Au@ZnO晶体能够在受到可见光照射时快速光催化降解模型有机染料（罗丹明B）。这项研究开辟了一个新的途径，设计的二嵌段共聚物稳定的纳米粒子，使建设的有机-无机纳米复合晶体，表现出紧急的性能。
Double-hydrophilic diblock copolymers have been extensively used as additives to tune the growth of inorganic crystals in aqueous media. However, there have been no reports of how double-hydrophilic diblock copolymer-decorated nanoparticles influence the morphology, structure, and properties of such crystals. Herein, a well-defined poly(ammonium 2-sulfatoethyl methacrylate)-poly(glycerol monomethacrylate) diblock copolymer is prepared by reversible addition-fragmentation chain transfer polymerization and then adsorbed onto the surface of gold nanoparticles via its dithiobenzoate end-group to form sterically stabilized nanoparticles. The growth of zinc oxide (ZnO) crystals in the presence of such nanoparticles leads to their occlusion, producing Au@ZnO nanocomposite crystals with a remarkable diabolo morphology. Furthermore, such Au@ZnO crystals enable the rapid photocatalytic degradation of a model organic dye (rhodamine B) when subjected to visible light irradiation. This study opens up a new avenue for the design of diblock copolymer-stabilized nanoparticles to enable the construction of organic–inorganic nanocomposite crystals that exhibit emergent properties.