Facile Formation of Gold Nanoparticles on Periodic Mesoporous Bipyridine-silica
Facile Formation of Gold Nanoparticles on Periodic Mesoporous Bipyridine-silica
复制标题
在周期性介孔联吡啶二氧化硅上轻松形成金纳米颗粒
DOI：
10.1016/j.cattod.2017.03.012
复制
发表时间：
2017
期刊：
影响因子：
5.3
通讯作者：
Atsushi Fukuoka
中科院分区：
文献类型：
--
作者：
4.Nobuhiro Ishito;Kiyotaka Nakajima;Yoshifumi Maegawa;Shinji Inagaki;Atsushi Fukuoka
二氧化硅支撑的金纳米颗粒（AuNP）可以在联吡啶掺入的周期性介孔有机二氧化硅（BPy-PMO）作为无机载体上合成。周期性介孔有机二氧化硅中的联吡啶基团与HAuCl4反应形成AuCl2基络合物，其结构对应于均相络合物[AuCl2(bpy)]Cl。复合物在 H2 中的热还原导致形成平均尺寸为 ca 的小金纳米颗粒。 3.8 纳米。结合氮气吸附、XRD、UV/Vis、TEM 和 XAFS 测量，证明均匀的金纳米颗粒均匀分布在中孔内。金纳米粒子的尺寸和分布主要受表面金属金与周期性介孔有机二氧化硅孔壁的强相互作用控制。 AuNPs/BPy-PMO 在苯甲醛有氧氧化中表现出比 Au/MCM-41 更高的催化活性。
Silica-supported gold nanoparticles (AuNPs) can be synthesized on a bipyridine incorporated periodic mesoporous organosilica (BPy-PMO) as an inorganic support. Reaction of a bipyridine group in the periodic mesoporous organosilica with HAuCl4forms an AuCl2-based complex, and its structure corresponds to a homogeneous complex, [AuCl2(bpy)]Cl. Thermal reduction of the complex in H2results in the formation of small gold nanoparticles with an average size of ca. 3.8 nm. Combined with nitrogen adsorption, XRD, UV/Vis, TEM, and XAFS measurements, it is demonstrated that uniform gold nanoparticles are homogeneously distributed inside mesopores. The size and distribution of gold nanoparticles are mainly controlled by strong interaction of surface metallic Au with pore walls of the periodic mesoporous organosilica. AuNPs/BPy-PMO shows higher catalytic activity than Au/MCM-41 in aerobic oxidation of benzaldehyde.