Optimized Design of Pt‐Doped Bi2WO6 Nanoparticle Synthesis for Enhanced Photocatalytic Properties
Optimized Design of Pt‐Doped Bi2WO6 Nanoparticle Synthesis for Enhanced Photocatalytic Properties
复制标题
DOI：
10.1002/ejic.201501208
复制
发表时间：
2016-05
影响因子：
2.3
通讯作者：
Marie-Anne Lavergne;C. Chanéac;D. Portehault;Sophie Cassaignon;O. Durupthy
中科院分区：
文献类型：
--
作者：
Marie-Anne Lavergne;C. Chanéac;D. Portehault;Sophie Cassaignon;O. Durupthy
采用湿法还原法在Bi 2 WO 6纳米颗粒上制备了铂的光催化异质结构，并与其他制备方法进行了比较。通过XPS和TEM对所制备的光催化剂进行了表征，结果证实了Bi 2 WO 6表面存在零价金属纳米粒子。以罗丹明B为目标染料，在蓝光（λmax = 445 nm）下，考察了这些异质结构的光催化活性。沉积的贵金属纳米颗粒显示出显着提高铋基材料在可见光下的光催化性能。制备模式和金属负载量都可能影响效率。所观察到的光催化增强已被归因于从半导体到金属的电子转移，这防止了快速的电子/空穴复合。然后，被捕获在金属中的电子可以参与O2的多电子还原。
The preparation of photocatalytic heterostructures of platinum on Bi2WO6 nanoparticles by a wet reduction method is described in this report and compared with other preparation methods. The as-obtained photocatalysts were characterized by XPS and TEM, the results of which confirmed the presence of solely zero-valent metal nanoparticles on the surface of Bi2WO6. The photocatalytic activity of these heterostructures was evaluated by the degradation of Rhodamine B under blue light (λmax = 445 nm). The deposited noble metal nanoparticles were shown to significantly improve the photocatalytic performance of the bismuth-based material under visible light. Both the preparation mode and the metal loading may impact on the efficiency. The observed photocatalytic enhancement has been attributed to an electron transfer from the semiconductor to the metal, which prevents fast electron/hole recombination. The electrons trapped in the metals may then participate in the multi-electron reduction of O2.