| 朱翰林,梁况.化学通报,2016,79(4):327-331,348. |
| 氧缺陷型SnO2纳米颗粒可见光催化性能的研究 |
| Study on visible-light photocatalytic properties of oxygen defect SnO2 nanoparticles |
| 投稿时间：2015-08-13 修订日期：2015-10-11 |
| DOI： |
| 中文关键词: 氧缺陷 SnO2 水热合成 甲基橙 光催化降解 |
| 英文关键词:Oxygen defect SnO2 Hydrothermal synthesis Methyl orange Photocatalytic degradation |
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| 中文摘要: |
| 本文报道了利用简单的水热法合成的一种可高效降解有机染料的氧缺陷型SnO2纳米颗粒新型光催化剂，利用X射线衍射（XRD）、透射电子显微镜（TEM）、高分辨透射电子显微镜（HRTEM）和紫外-可见分光光度计等手段对催化剂的结构及性能进行了表征。研究结果表明，所制备的催化剂其禁带宽度最小可达2.90 eV，可实现对可见光的有效吸收利用，对甲基橙有机染料降解反应具有很高的光催化活性。将该催化剂（1 g/L）分散在10 mg/L的甲基橙溶液中，可见光照射下，40分钟内甲基橙的降解率达99%以上。由于该催化剂具有合成方法简单、高效、成本低和反应条件温和等特点，为有效解决有机染料对环境的污染问题提供了一条新的途径。 |
| 英文摘要: |
| In this paper, we reported a novel photocatalyst consisting of oxygen-deficient SnO2 nanoparticles which can effectively degrade methyl orange (MO) under visible light. The catalyst was prepared by a simple hydrothermal method. X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and UV-vis diffuse reflectance spectra were employed to characterize the structure and catalytic performance of the catalyst. The results suggest that the band gap of as-prepared catalyst can be lowered to 2.90 eV, and thus the visible light absorption of the catalyst can be enhanced. The photocatalytic activity of the as-prepared catalyst was evaluated by degradation of methyl orange (MO) under irradiation of visible light. It turns out that the degradation rate of MO (10 mg/L) by oxygen-deficient SnO2 nanoparticles (1 g/L) can reach above 99% in 40 minutes under visible light illumination. Because the reported catalyst here has the advantages of simple synthesis, high catalytic performance, low costs and mild reaction environment, it provides a new approach to solve the problem of organic dyes pollution in environment. |
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