Photocatalytic synthesis of copper colloids from Cu(II) by the ferrihydrite core of ferritin
Photocatalytic synthesis of copper colloids from Cu(II) by the ferrihydrite core of ferritin
复制标题
DOI：
10.1021/ic035415a
复制
发表时间：
2004-05-31
影响因子：
4.6
通讯作者：
Douglas, T
中科院分区：
文献类型：
--
作者：
Ensign, D;Young, M;Douglas, T
铁储存蛋白铁蛋白包裹着氧化铁纳米颗粒。这些纳米颗粒的尺寸和性质可以通过控制Fe（II）的氧化水解反应来调节。这种矿化的铁蛋白蛋白笼先前已被证明是一种有效的光催化剂，用于还原Cr（VI）。在目前的工作中，我们证明，Fe（O）OH矿化铁蛋白催化光还原的Cu（II），形成一个稳定的，空气敏感的，胶体分散的Cu（O）。此外，可以通过改变Cu（II）与铁蛋白的比率来控制Cu胶体的粒度。这说明了一个重要的原理，即一种预成型材料的性质可以用于第二种材料的特定合成，从而定制最终产品的所需物理性质。这个过程代表了一个多步骤的材料合成：从催化前体形成新的纳米材料。
The iron-storage protein ferritin encapsulates a nanoparticle of iron oxide. The size and properties of these nanoparticles can be adjusted by controlled oxidative hydrolysis reactions of Fe(II). This mineralized ferritin protein cage has previously been shown to act as an effective photocatalyst for reduction of Cr(VI). In the present work, we demonstrate that Fe(O)OH-mineralized ferritin catalyzes the photoreduction of Cu(II) to form a stable, air-sensitive, colloidal dispersion of Cu(O). In addition, the particle sizes of the Cu colloids can be controlled by varying the ratio of Cu(II) to ferritin. This illustrates an important principle, namely that the properties of one preformed material can be utilized for the specific synthesis of a second material, thus tailoring the desired physical properties of the final products. This procedure represents a multistep materials synthesis: the formation of a new nanomaterial from a catalytic precursor.