Abstract
CaSO4·0.5H2O whiskers were successfully synthesized by hydrothermal process, in which phosphogypsum (PG) was employed as precursors. The effect of the hexadecyltrimethylammonium bromide (CTAB) on the formation of phosphogypsum-based CaSO4·0.5H2O whiskers was investigated in details. Results indicated that the average diameter and length of as-prepared CaSO4·0.5H2O whiskers with rough surface were about 0.15-2.5μm and 10-50 μm, respectively. The added CTAB templates would effectively guided the selective growth of CaSO4·0.5H2O particles which led to formation of whiskers with high aspect ratios.
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