Effect of the H₂O/Al₂(SO₄)₃ ratio on physical properties in the synthesis of porous AlO(OH) nano gel by homogeneous precipitation

Effect of the H₂O/Al₂(SO₄)₃ ratio on physical properties in the synthesis of porous AlO(OH) nano gel by homogeneous precipitation

An AlO(OH) nano gel has been used as a precursor of a ceramic material, a coating material and a catalyst. For these uses, not only control of the physiochemical properties for the particle morphology, pore characteristics and peptization but also studies of a synthetic method for the preparation of advanced application products were required. In this study, an AlO(OH) nano gel was prepared through the aging and drying process of aluminum hydroxides gel precipitated by the neutralization of a dilute NaOH solution and an Al₂(SO₄)₃ solution. In this process, optimum synthetic conditions of an AlO(OH) nano gel having excellent pore volume from the effect of a H₂O/Al₂(SO₄)₃ mole ratio on gel precipitates has been studied. The H₂O/ Al₂(SO₄)₃ mole ratio brought about numerous changes in crystal morphology, specific surface area, pore volume and pore size. The physiochemical properties for the AlO(OH) nano gel were investigated using the XRD, TEM, TG/DTA, FT-IR and the N2 BET method.

An AlO(OH) nano gel has been used as a precursor of a ceramic material, a coating material and a catalyst. For these uses, not only control of the physiochemical properties for the particle morphology, pore characteristics and peptization but also studies of a synthetic method for the preparation of advanced application products were required. In this study, an AlO(OH) nano gel was prepared through the aging and drying process of aluminum hydroxides gel precipitated by the neutralization of a dilute NaOH solution and an Al₂(SO₄)₃ solution. In this process, optimum synthetic conditions of an AlO(OH) nano gel having excellent pore volume from the effect of a H₂O/Al₂(SO₄)₃ mole ratio on gel precipitates has been studied. The H₂O/ Al₂(SO₄)₃ mole ratio brought about numerous changes in crystal morphology, specific surface area, pore volume and pore size. The physiochemical properties for the AlO(OH) nano gel were investigated using the XRD, TEM, TG/DTA, FT-IR and the N2 BET method.