Short-time synthesis of SBA-15s with large mesopores via partitioned cooperative self-assembly process based on sodium silicate

摘要

Based on the cheap sodium silicate and recently developed partitioned cooperative self-assembly (PCSA) process, this work demonstrated that the combination of the PCSA process with the hydrothermal treatment at elevated temperatures can produce the SBA-15s with large mesopores (>13 nm, KJS sizes), which noticeably larger than those prepared via the conventional method under the same synthetic conditions. Especially, the synthesis can be finished in a short period (24 h). The synthetic parameters, especially the amounts of precursor, interval times and stirring times, were all shown to have influence on the mesopore sizes.