A series of gold nanoparticles (AuNPs) with controllable size were prepared from immobilized gold-containing ionic liquid on SBA-15 ([email protected]) at room temperature. AuNPs size and shape could be controlled inside porous SBA-15 in the presence of immobilized 1-methyl-3-(3-trimethoxysilyl- propyl)-imidazolium chloride by controlling a concentration and a feed rate of a reducing agent NaBH₄. The smallest AuNPs with the average size of 1.6 nm was obtained at a fixed feed rate of 0.2 ml/min with 4 mM NaBH₄. The transformation of AuNPs shape from spherical to capsule-like NPs was observed at low feed rate of 0.04 ml/min. The prepared AuNPs catalysts were characterized by TEM, XPS, FTIR, and XRD. The catalyst with the smallest NPs, AuNP(1.6 nm)[email protected], exhibited the highest catalytic performance in p-nitrophenol hydrogenation reaction at room temperature. Moreover this catalyst was reusable up to four recycle processes.

在室温下，由固定在SBA-15上的含金离子液体固定了一系列尺寸可控的金纳米颗粒（AuNPs）（[电子邮件保护]）。通过固定还原剂NaBH ₄的浓度和进料速度，可以在固定的1-甲基-3-（3-三甲氧基甲硅烷基-丙基）-咪唑鎓氯化物存在下，控制多孔SBA-15内部的AuNP尺寸和形状。用4 mM NaBH ₄以0.2 ml / min的固定进料速度获得平均尺寸为1.6 nm的最小AuNPs。在0.04 ml / min的低进料速度下观察到AuNPs形状从球形NP变为胶囊状NP。通过TEM，XPS，FTIR和XRD对制备的AuNPs催化剂进行了表征。具有最小NPs的AuNP（1.6 nm）催化剂在室温下对对硝基苯酚加氢反应中表现出最高的催化性能。此外，该催化剂可重复使用多达四个循环过程。