Hydroxyapatite nanosheet-assembled microspheres: hemoglobin-templated synthesis and adsorption for heavy metal ions.
Hydroxyapatite nanosheet-assembled microspheres: hemoglobin-templated synthesis and adsorption for heavy metal ions.
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DOI：
10.1016/j.jcis.2013.10.034
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发表时间：
2014-02
影响因子：
9.9
通讯作者：
Xinyu Zhao;Yingjie Zhu;Jing Zhao-;Bingqiang Lu;Feng Chen;C. Qi;Jin Wu
中科院分区：
文献类型：
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作者：
Xinyu Zhao;Yingjie Zhu;Jing Zhao-;Bingqiang Lu;Feng Chen;C. Qi;Jin Wu
羟基磷灰石(HAP)纳米结构在药物输送、组织工程、骨修复、气敏、催化和水处理等领域具有广泛的潜在应用前景。受HAP与蛋白质高度亲和力的启发，我们设计并开发了一种以血红蛋白为软模板的三维(3D)HAP纳米片状组装微球(HAP-NMSS)的合成策略。用X射线粉末衍射仪(XRD)和场发射扫描电子显微镜(SEM)对所制备的产物进行了表征。实验结果表明，三维羟基磷灰石微球是以羟基磷灰石纳米片为构建块自组装而成的。考察了血红蛋白浓度、水热温度和时间对产物形貌和晶相的影响。在系统研究的基础上，提出了HAP-NMSS的可能形成机制。探索了所制备的HAP-NMSS在水处理中的潜在应用。实验结果表明，HAP-NMSS对重金属离子具有较高的吸附容量，对酸性溶液中的Pb2+离子具有较高的选择性吸附活性，在废水处理中具有良好的应用前景。
Hydroxyapatite (HAP) nanostructures have wide potential applications in many fields such as drug delivery, tissue engineering, bone repair, gas sensing, catalysis and water treatment. Inspired with the fact that HAP has a high affinity with proteins, we have designed and developed a new synthetic strategy for three-dimensional (3-D) HAP nanosheet-assembled microspheres (HAP-NMSs) by employing hemoglobin as a soft template. The as-prepared products are characterized by X-ray powder diffraction (XRD) and field-emission scanning electron microscopy (SEM). The experimental results show that 3-D HAP microspheres are constructed by the self-assembly of HAP nanosheets as the building blocks. The influences of hemoglobin concentration, hydrothermal temperature and time on the morphology and crystal phase of the product are investigated. Based on the systematic investigation, a possible formation mechanism of HAP-NMSs is proposed. The as-prepared HAP-NMSs are explored for the potential application in water treatment. The experimental results indicate that the HAP-NMSs have a high adsorption capacity for heavy metal ions and selective adsorption activity for Pb2+ions in acidic solution, thus are promising for the application in wastewater treatment.