【作者】 屠国平；

【导师】 张华集； 张雯；

【作者基本信息】 福建师范大学 ， 材料加工工程， 2009， 硕士

【摘要】 采用微相氨蒸发诱导自组装法成功制备了介孔氧化锌,并对其进行氮气的低温吸附和脱附测定其BET比表面积、孔容和孔径分布,结合Low-Angle XRD和TEM表征氧化锌的结构;利用Wide-Angle XRD、HRTEM,、EDS、SAED等表征方法对氧化锌孔壁的物相和晶相进行分析;讨论不同合成条件对介孔氧化锌的孔结构的影响,并探讨微相氨蒸发自组装法制备介孔氧化锌的成孔的机理。实验结果表明:介孔氧化锌的BET比表面积和孔容分别为223.77 m²g^-1和0.6930cm³g^-1,孔径为9.79 nm;孔壁晶型为红锌矿型氧化锌（a=3.253,c=5.213,P6₃mc,JCPDS card No.:079-0207）单晶;氧化锌形成介孔结构,其反应温度必须在70℃以上;蔗糖的量和氨的量对氧化锌介孔结构有一定影响;后处理的晶化温度对氧化锌的晶型起到至关重要的作用。采用抑菌环法和最小抑菌浓度法,对所合成的不同BET比表面积介孔氧化锌进行抗菌性能测试。结果表明:介孔氧化锌的大肠杆菌的最小抑菌浓度能达到100μg/mL,金黄色葡萄球菌的最小抑菌浓度能达到50μg/mL,说明介孔氧化锌的具有良好的抗菌性能。更多还原

【Abstract】 Mesoporous ZnO was synthesized successfully by using the micro-phase ammonia evaporation induced self-assembly method. And the pore structure was studied by measuring the N₂ adsorption/desorption isotherms of porous material, Low-angle XRD and TEM. Analytical methods such as XRD, HRTEM, EDS and SAED were used to investigate the compositions and structures of mesoporous ZnO. Then the effect of the various synthesis conditions on pore structure of mesoporous ZnO was studied. And the mechanism of formation of mesoporous ZnO, prepared by the micro-phase ammonia evaporation induced self-assembly method, was explored.The results showed that, the BET special surface area, pore volume and pore size was 223.77 m²g^-1, 0.6930 cm³g^-1 and 9.79 nm, respectively. The pore wall was made up of zincite single crystal （a=3.253, c=5.213, P6₃mc, JCPDS card No.:079-0207） . Only under the situation of the Zinc ammonia/sucrose precursor solution micro-phase formed and the reaction temperature above 70℃can the ammonia evaporation induce self-assembly process and obtain meso-structured ZnO. The amount of sucrose and ammonia produce some effect on the mesoporous structure of zinc oxide, and crystallization temperature play a crucial role in crystal type of zinc oxideThe antibacterial performance of the mesoprous ZnO samples with various BET specific surface area were measured by applying Minimal Inhibitory Concentration （MIC） and Bacteriostatic Annulus method. The results indicated that, the value of MIC of mesoporous ZnO for Escherichia coli can achieve 100μg/mL, and the value of MIC of mesoporous ZnO for Staphylococcus aureus can achieve 100μg/mL. The antibacterial performance of mesoporous ZnO is quite excellent.更多还原