Hydrothermal Synthesis of SBA-15 Using Sodium Silicate Derived from Coal Gangue

Jing Wang,Rongming Chen,Xiaofang Duan,Li Fang,Fangqin Cheng

doi:10.1155/2013/352157

Abstract

Well-ordered SBA-15 was prepared with a hydrothermal route by sodium silicate derived from coal gangue. The as-prepared sample was analyzed by SAXRD, BET, TEM, and SEM, respectively. The results indicate that at a low hydrothermal temperature of 100∘C the well-ordered mesoporous SBA-15 could be synthesized. The surface area, pore volume, and pore size of the sample are 552 m2/g, 0.54 cm3/g, and 7.0 nm, respectively. It is suggested that coal gangue could be used in obtaining an Si source to prepare mesoporous materials, such as SBA-15.

Highlights

The coal production of China ranks top in the world, and so there is the biggest coal gangue yield
Despite being used as alternative material in road, pavement, embankment, foundation, or building construction, and so forth [1, 2], most of the coal gangue is still open-air stack-stored near by the coal mines and occupies vast pieces of land leading to a series of environmental problems, such as pollutions of air, water, and soil induced by the spontaneous combustion and eluviations
In comparison with the XRD patterns of SBA-15 prepared at 200∘C showed as curve (b) in Figure 1, the diffractions of S-100 shift to higher 2θ degrees indicating small pore volume formed at lower hydrothermal temperature

Summary

Introduction

The coal production of China ranks top in the world, and so there is the biggest coal gangue yield. Despite being used as alternative material in road, pavement, embankment, foundation, or building construction, and so forth [1, 2], most of the coal gangue is still open-air stack-stored near by the coal mines and occupies vast pieces of land leading to a series of environmental problems, such as pollutions of air, water, and soil induced by the spontaneous combustion and eluviations. This became one of the highly important factors in restricting the economic sustainable development and the ecological civilization construction of the coal production area. We synthesized well-ordered SBA-15 successfully using sodium silicate derived from coal gangue under lowtemperature hydrothermal condition to gain insight into the possibility of high-quality application of coal gangue

Experimental

Results and Discussion

Conclusion