Sol-gel derived mesoporous GaAlPO4 glass for heavy metal ion sequestration
Sol-gel derived mesoporous GaAlPO4 glass for heavy metal ion sequestration
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用于封存重金属离子的溶胶凝胶衍生介孔 GaAlPO4 玻璃
DOI：
10.1039/c6ra17766b
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发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Zhang, Long
中科院分区：
文献类型：
--
作者：
He, Jin;Ma, Pengfei;Zhang, Long
具有化学多样性和高比表面积的介孔磷酸盐材料是其作为重金属离子吸附材料的实际应用所必需的。本文采用简单的水溶胶-凝胶法，在不添加任何表面活性剂或模板剂的条件下，制备了新型的镓铝磷酸盐介孔玻璃。使用固态NMR技术监测玻璃结构及其从凝胶到最终玻璃的演变，提供对反应机理的详细了解。在介孔GaAlPO 4玻璃的形成过程中，镓通过Ga-O-P键进入PO 4四面体。测试所得的中孔玻璃样品作为吸附剂从溶液中去除Pb（II）阴离子，并且三元氧化物玻璃显示出高吸附容量（>36.63 mg g-1，即0.18 mmol g-1）。由于它们的综合特征（包括它们的可变组成、高比表面积、可调节的孔径和形状柔性）以及特定的酸碱表面性质，此类介孔磷酸镓铝材料也被预期具有作为催化剂或催化剂载体用于工业应用的潜力。
Mesoporous phosphate materials with chemical diversity and a high surface area are essential for their practical applications as heavy metal ion adsorbent materials. Herein, novel gallium aluminum phosphate mesoporous glasses are prepared through a simple aqueous sol–gel route free of any surfactant or template. The glass structure and its evolution from the gel to the final glass were monitored using solid-state NMR techniques, providing detailed insight into the reaction mechanism. During the formation of the mesoporous GaAlPO4 glass, the gallium entered into the PO4 tetrahedron via Ga–O–P bonds. The resulting mesoporous glass samples were tested as adsorbents to remove Pb(II) anions from solution and the ternary oxide glasses show high adsorption capacities (>36.63 mg g−1, that is 0.18 mmol g−1). Owing to their integrated features (including their variable compositions, high specific surface area, tunable pore size and shape flexibility) as well as specific acid–base surface properties, such mesoporous gallium aluminum phosphate materials are also expected to have potential either as catalysts or catalyst supports for industrial applications.