Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania.
University of Bucharest, Physical Chemistry Department, Bd. Elisabeta 4-12, 030018, Romania.
Carbohydr Polym. 2015 Jan 22;115:285-93. doi: 10.1016/j.carbpol.2014.08.061. Epub 2014 Sep 3.
A starch-assisted synthetic methodology of multispheres ZnO-starch biocomposites was developed. An additional thermal processing of the ZnO-starch composites induces the formation of ZnO with donut-like morphology. The synthesis of single-phase zinc oxide with a spherical morphology is conditioned by the presence of starch, which acts as template, stabilizing/capping agent. The synthesized structures present significant photocatalytic activities; a total phenol mineralization is attained with the donut-like ZnO photocatalyst under visible light irradiation, due to a cumulative effect of the its relatively large specific surface area, high crystallinity and favorable combination of defects for band narrowing, which together permit an enhanced utilization rate of the light.
开发了一种淀粉辅助的多球体 ZnO-淀粉生物复合材料的合成方法。对 ZnO-淀粉复合材料进行额外的热处理会诱导形成具有甜甜圈状形态的 ZnO。淀粉作为模板、稳定剂/封端剂的存在，有利于单相球形氧化锌的合成。所合成的结构具有显著的光催化活性；在可见光照射下，具有甜甜圈状 ZnO 光催化剂的总酚矿化作用得以实现，这是由于其相对较大的比表面积、高结晶度和有利于带隙缩小的缺陷组合的累积效应，共同允许光的利用率得到提高。
