微波水热合成γ-AlOOH和γ-Al2O3纳米片

以九水合硝酸铝和尿素为原料,聚乙烯吡咯烷酮为表面活性剂,在180℃微波水热条件下反应30min,制备了γ-AlOOH片状结构产物。此前驱物经600℃热分解2h,得到γ-Al2O3纳米片。采用SEM、TEM、SAED和XRD等方法对样品进行表征,并测试了γ-Al2O3纳米片对刚果红染料的吸附性能。实验结果表明,采用微波水热法可以得到长度约为1μm,厚度为30nm的γ-AlOOH纳米片,该产物经煅烧处理后可以得到微观形貌保持不变的γ-Al2O3纳米片,且片状结构表面存在介孔结构。γ-Al2O3纳米片状结构表现出对废水中刚果红污染物的强吸附性能。

Microwave hydrothermal synthesis of γ-AlOOH and γ-Al2O3 nanosheets

γ-AlOOH nanosheets were successfully prepared via microwave hydrothermal method at 180℃ for 30 min,by using Al(NO3)3·9H2O,urea as raw materials and polyvinylpyrrolidone(PVP) as surfactant respectively.The morphology-contained γ-Al2O3 can be obtained though the thermal decomposition of γ-AlOOH precursors at 600℃ for 2h.The as-prepared products were characterized by SEM,TEM,SAED and XRD etc.Finally,γ-Al2O3 nanosheets were used to adsorb Congo red from water solution.The experimental results shown that γ-AlOOH nanosheets about 1 μm long,30nm thick can be obtained by using the microwave hydrothermal method.The morphology-contained γ-AlOOH nanosheets were obtained after a thermal decomposition process,and nanometer-size holes appear on the surface of the nanosheets.γ-Al2O3 nanosheets are powerful in the removal of Congo red pollutant from waste water.