Zhou Huiping, Gao Shaomin, Zhang Wenwen, An Zhaohui, Chen Donghui
School of Chemical and Environmental Engineering, Shanghai Institute of Technology Haiquan Road 100 201418 Shanghai PR China
College of Environmental Science and Engineering, Donghua University North Renmin Road 2999 201620 Shanghai PR China
RSC Adv. 2019 Mar 4;9(13):7196-7202. doi: 10.1039/c8ra08605b. eCollection 2019 Mar 1.
Amino-functionalized spherical mesoporous silica (ASMS) materials were successfully prepared a convenient treatment method by using 3-aminopropyltrimethoxysilane (APTES), which was used in different concentrations in the process of spherical mesoporous silica (SMS) synthesis. The adsorption performances of ASMS were evaluated by taking toluene as a simulated pollutant and the adsorption mechanism was also studied. A variety of characterization methods were adopted, including scanning electron microscopy, small-angle X-ray diffraction and Fourier-transform infrared spectroscopy techniques and nitrogen adsorption-desorption analyses, which led to a better understanding of the performance of the materials. It was found that the SMS has a good adaptability due to the amino functionality, the pore structure still remains in the modified samples even when the mass ratio of APTES/TEOS is up to 3, and the chemical properties of the material surface are significantly improved by the amino functionality. The results show that the capacities of the toluene adsorption follow the order of SMS < ASMS-1 < ASMS-3 < ASMS-2. ASMS-2 has the highest toluene adsorption capacity (98.1 mg g) and the saturated adsorbent can be easily regenerated by thermal desorption, which has a stable adsorption capacity after 4 adsorption cycles. These experimental data indicated that amino functionalization could affect both the pore structure and surface chemical properties of SMS, making ASMS a promising material for the reduction of industrial volatile organic compound emissions in air treatment.
通过使用3-氨丙基三甲氧基硅烷（APTES），成功制备了氨基功能化球形介孔二氧化硅（ASMS）材料，这是一种简便的处理方法，在球形介孔二氧化硅（SMS）合成过程中使用了不同浓度的APTES。以甲苯为模拟污染物评估了ASMS的吸附性能，并研究了吸附机理。采用了多种表征方法，包括扫描电子显微镜、小角X射线衍射、傅里叶变换红外光谱技术和氮吸附-脱附分析，从而更好地了解了材料的性能。研究发现，由于氨基官能团的存在，SMS具有良好的适应性，即使APTES/TEOS的质量比高达3，改性样品中仍保留了孔结构，并且氨基官能团显著改善了材料表面的化学性质。结果表明，甲苯吸附量的顺序为SMS < ASMS-1 < ASMS-3 < ASMS-2。ASMS-2具有最高的甲苯吸附容量（98.1 mg/g），饱和吸附剂可通过热脱附轻松再生，在4次吸附循环后具有稳定的吸附容量。这些实验数据表明，氨基功能化可以影响SMS的孔结构和表面化学性质，使ASMS成为空气处理中减少工业挥发性有机化合物排放的有前景的材料。
