The fabrication of nanostructured catalysts based on noble metal nanoparticles has attracted much attention. In this study, multiple tiny Ag nanoparticles loaded hollow mesoporous organosilica spheres (MT-Ag@HMOS) were synthesized by a novel polymer mediated growth approach. During the preparation, polyacrylic acid@hollow mesoporous organosilica spheres (PAA@HMOS) were first produced formed by condensation of organosilica precursor on polyacrylic acid (PAA) colloids; subsequently, tiny Ag nanoparticles were in situ immobilized both in the cavity and on the shell of PAA@HMOS due to their abundant thioether groups and unique structure. The produced materials were characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG), N₂ adsorption-desorption instruments, X-ray diffraction (XRD), and X-ray photoelectron spectra (XPS). The MT-Ag@HMOS exhibited a spherical morphology with an average diameter of about 120 nm, a high surface area of 76.5 m²·g⁻¹, as well as high content of tiny Ag nanoparticles (approximately 3 nm). In addition, the catalytic activities of the MT-Ag@HMOS on 4-nitrophenol (4-NP), Congo red (CR), and Rhodamine B (RhB) reduction in the presence of NaBH₄ in aqueous medium were investigated. Experimental results show MT-Ag@HMOS particles are promising candidates for the treatment of waste water supplemented contaminated by 4-NP and various dyes.

基于贵金属纳米颗粒的纳米结构催化剂的制备引起了广泛的关注。在这项研究中，通过新颖的聚合物介导的生长方法合成了多个负载有中空介孔有机二氧化硅球的微小银纳米颗粒（MT-Ag @ HMOS）。在制备过程中，首先制备了有机丙烯酸前体在聚丙烯酸（PAA）胶体上缩合形成的丙烯酸@中空介孔有机硅球（PAA @ HMOS）。随后，由于微小的银纳米颗粒具有丰富的硫醚基团和独特的结构，它们被原位固定在PAA @ HMOS的腔体和壳中。通过透射电子显微镜（TEM），傅立叶变换红外光谱（FTIR），热重分析（TG），N_2种吸附解吸仪器，X射线衍射（XRD）和X射线光电子能谱（XPS）。MT-Ag @ HMOS表现出球形形态，平均直径约为120 nm，高表面积为76.5 m ² ·g ^-1，并且含有大量的微小Ag纳米颗粒（约3 nm）。此外，研究了在水性介质中存在NaBH ₄的条件下，MT-Ag @ HMOS对4-硝基苯酚（4-NP），刚果红（CR）和若丹明B（RhB）还原的催化活性。实验结果表明，MT-Ag @ HMOS颗粒有望用于处理被4-NP和各种染料污染的废水。