Synthesis and environmental applications of aluminum-containing MCM-41 type material from industrial waste containing silicon and aluminum

In this work, aluminum-containing MCM-41 mesoporous materials (ACMCM-41) were successfully prepared from liquid crystal display (LCD) waste glass and chemical mechanical polishing (CMP) sludge by a novel route for the reused of industrial waste. It can be inferred from the increase in the surface area, the introduction of an appropriate amount of aluminum retained the ordered mesoporous structure of the ACMCM-41 during the hydrothermal treatment process. Larger pore volume and specific surface area, as well as a great deal of mesopores distributed in the range of 3-20 nm can greatly contribute to the improvement of humidity control performance. ACMCM-41 was tested for its average equilibrium moisture content under different relative humidity of the material under water vapor adsorption/desorption. ACMCM-41 showed excellent humidity control performance (61.18 m3/ m3). The possibility of synthesis zeolite from the residual solid after aged was also discussed. The residual solids can be reused as suitable raw material for the synthesis of zeolite.

Automated summary

Aluminum-containing MCM-41 mesoporous materials were successfully prepared from LCD waste glass and CMP sludge, retaining the ordered mesoporous structure during hydrothermal treatment and showing great potential for humidity control. The residual solids could be reused for synthesizing zeolite, indicating a value in recycling industrial waste.