Preparation of Mesoporous Silica from Electrolytic Manganese Slags by Using Amino-Ended Hyperbranched Polyamide as Template

Abstract

Large quantities of waste slags are produced during the preparation of electrical manganese, causing serious pollution to the environment. The recycling and utilization of electrolytic manganese slags (EMS) is a serious challenge to the industry. Here, we report the utilization of EMS in preparation of high-performance mesoporous silica using amino-ended hyperbranched polyamide (AEHPA) as template. The effects of AEHPA content and molecular weight on properties of mesoporous silica, including the specific surface area, pore diameter, pore volume, size and distribution, have been investigated. Based on 0.3 wt% AEHPA-2 during preparing silica, the specific surface area, pore volume and pore diameter of the produced amorphous mesoporous silica are 451.34 m2•g-1, 0.824 cm3•g-1 and 7.09 nm, respectively, showing remarkable improvements over the silica without AEHPA with specific surface area (271.05 m2•g-1), pore volume (1.167 cm3•g-1) and pore diameter (17.43 nm). The formation mechanism of mesoporous silica ...