Removal of Orange II Dye in Water by Visible Light Assisted Photocatalytic Ozonation Using Bi2O3 and Au/Bi2O3 Nanorods
Removal of Orange II Dye in Water by Visible Light Assisted Photocatalytic Ozonation Using Bi2O3 and Au/Bi2O3 Nanorods
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DOI：
10.1021/ie101361c
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发表时间：
2010-10-20
影响因子：
4.2
通讯作者：
Wu, Jerry J.
中科院分区：
文献类型：
--
作者：
Anandan, Sambandam;Lee, Gang-Juan;Wu, Jerry J.
本文报道了用微波辐射制备的Bi2O_3和Au/Bi2O_3纳米棒对水中橙色II染料进行可见光催化臭氧氧化和其他相关氧化过程的结果，与传统的90℃热处理方法制备的Bi2O_3颗粒相比，该纳米棒的光催化臭氧氧化和其他相关氧化过程的效率提高了4倍。这是因为将半导体材料调整到纳米尺寸可以产生电子和空穴的高量子限制，从而提高照明效率。此外，纳米材料的沉积也可以用来提高器件的机械强度。也就是说，沉积的金纳米颗粒起到电子陷阱的作用，阻碍电子/空穴复合。
This paper presents the results of visible light assisted photocatalytic ozonation and other related oxidation processes for the removal of Orange II dye from water using Bi2O3 and Au/Bi2O3 nanorods prepared using microwave irradiation which was found effective compared to Bi2O3 particles prepared by conventional heat treatment method at 90 degrees C. Particularly, in the photocatalytie zonation using Au/Bi2O3 nanorods, a fourfold increase in the rate was observed as compared to that in the absence of Au/Bi2O3. This is because tuning semiconductor materials into nanosize could create high quantum confinement of electron and hole to increase the illumination efficiency. In addition, the deposition of nanomaterial can also be employed to enhance the mechanical strength of devices. That is, deposited Au nanoparticles act as electron traps to impede electron/hole recombination.