| 掺铋纳米TiO_2制备及可见光催化降解有机污染物 |
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| 引用本文： | 姜晓阳,方艳芬,邓安平,肖峰峰,黄应平,潘家荣,杨天鸣. 掺铋纳米TiO_2制备及可见光催化降解有机污染物[J]. 太阳能学报, 2010, 31(3) |
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| 作者姓名： | 姜晓阳 方艳芬 邓安平 肖峰峰 黄应平 潘家荣 杨天鸣 |
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| 作者单位： | 1. 三峡大学Alan G·MacDiarmid(艾伦麦克德尔米德)再生能源研究所,宜昌,443002
2. 中南民族大学催化材料科学湖北省重点实验室,武汉,430070 |
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| 基金项目： | 国家重点苊研究发展计划(973)项目，国家自然科学基金，湖北省青年杰出人才基金，催化材料科学湖北省重点实验室开放基金研究项目 |
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| 摘 要： | 采用在酸性条件下超声沉淀的方法低温制备了Bi掺杂TiO_2纳米粉体,采用X射线光电子能谱(XPS)、X射线衍射(XRD)和透射电镜(TEM)对催化剂进行了初步表征,发现其禁带宽度变窄,主要为锐钛矿(82.7%)和金红石(17.3%)混晶,纳米尺寸为25.8nm。以酸性桃红(SRB)和无色小分子2,4-二氯苯酚(2,4-dichlorophenol,2,4-DCP)作为探针反应,在可见光照射下(λ420nm)测定了SRB降解过程中总有机碳(1OC)的变化,发现SRB的TOC去除率为61.6%。跟踪测定光催化反应体系中氧化物种,表明光催化涉及羟基自由基(·OH)过程,所制备的催化剂在可见光下具有较高的催化氧化活性。
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| 关 键 词： | Bi掺杂 超声沉淀 可见光 降解 |
PREPARATION OF Bi-DOPED NANO-TiO_2 AND DEGRADATION OF ORGANIC POLLUTANTS UNDER VISIBLE LIGHT |
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| Abstract: | Bi/TiO_2 powder had been prepared in acidity condition at low temperature by the method of ultrasonic deposition .The characteristics of TiO_2 and Bi/TiO_2 were carried out using XPS, XRD and TEM.The results showed that the band gap is narrower, the TiO_2 synthesized belonged to anatase (82.7%) and rutile (17.3%) and the size of Bi/TiO_2 was 25.8nm.The degradation of Sulforhodamine-B(SRB) and 2, 4-dichlorophenol(2, 4-DCP) was used as probe reaction .The changes of TOC values before and after had been measured during the photo-catalytic degradation of SRB under visible light irradiation.The results showed the TOC removal rate of SRB is 61.6% .Photo-catalytic degradation involved in OH through detecting oxidation species and catalyst prepared had high activity of catalysis and oxidation. |
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| Keywords: | TiO_2 Bi-doped TiO_2 ultrasonic deposition visible light degradation |
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