| 添加NaBF4对阳极氧化法制备TiO2纳米管光催化剂的影响 |
| Effect of NaBF4 Addition on the Preparation of TiO2 Nanotubes Photocatalyst by Anodic Oxidation Method |
| 作者 | 单位 | E-mail | | 王竹梅 | 景德镇陶瓷大学材料科学与工程学院, 中国轻工业功能陶瓷材料重点实验室, 景德镇 333403 | | | 朱晓玲 | 景德镇陶瓷大学材料科学与工程学院, 中国轻工业功能陶瓷材料重点实验室, 景德镇 333403 | | | 李月明 | 景德镇陶瓷大学材料科学与工程学院, 中国轻工业功能陶瓷材料重点实验室, 景德镇 333403 | lym6329@163.com | | 廖润华 | 景德镇陶瓷大学材料科学与工程学院, 中国轻工业功能陶瓷材料重点实验室, 景德镇 333403 | | | 沈宗洋 | 景德镇陶瓷大学材料科学与工程学院, 中国轻工业功能陶瓷材料重点实验室, 景德镇 333403 | |
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| 摘要: 在阳极氧化电解液中添加NaBF4制得了具可见光活性的B掺杂TiO2纳米管阵列（B/TNTs）。采用扫描电镜（FE-SEM）、能谱仪（EDS）、X射线衍射（XRD）、傅立叶红外光谱（FTIR）、紫外-可见漫反射光谱（UV-Vis DRS）以及X射线光电子能谱（XPS）对样品进行表征，以亚甲基蓝（MB）的光催化降解为目标反应评价其光催化活性。结果表明：添加NaBF4后，TiO2纳米管表面形貌变化较大；B掺入到TiO2晶格中形成B-O-Ti键；B掺杂使得TiO2纳米管表面羟基量增加、光学带隙能减小、光吸收阀值红移，且B掺杂量越多，其相应值的变化量越大；B掺杂能促进TiO2锐钛矿相的发育，纳米管经550℃煅烧后仍保持未掺杂样品的锐钛矿相结构；NaBF4的最佳添加量为0.6%（w/w）时，所得样品光催化活性最佳，可见光下光催化降解MB的4 h降解率由未添加的39.90%提高至75.15%，且反复使用10次后其光催化性能基本保持不变；总有机碳（TOC）分析结果表明，MB在可见光下能被B/TiO2有效矿化。 |
| 关键词: B掺杂 TiO2纳米管阵列 可见光 光催化活性 |
| 基金项目: 国家自然科学基金（No.51462010）和江西省教育厅科学技术研究（No.51462010）资助项目 |
| Abstract: Visible light-active boron doped TiO2 nanotube arrays (B/TNTs) were synthesized by adding NaBF4 in anodic oxidation electrolyte. The photocatalytic properties to methylene blue(MB) solution were investigated under visible light irradiation. FE-SEM analysis showed that the morphology of B/TNTs was obviously different. EDS, XPS and FTIR analysis indicated that boron was incorporated into the TNTs lattice to form B-O-Ti bond. B doping could effectively promote the formation of active group Ti-OH on the surface of TiO2, decrease the band gap energy and make the absorption edges of the samples red-shifting. Such effect became stronger with the increase of the B doping concentration. XRD analysis indicated that B doping promoted the growth of anatase grains. The doped TiO2 nanotubes can form anatase phase as pure one when calcined at 550 ℃. The B/TNTs with an optimal photocatalytic activity were fabricated with the NaBF4 concentration of 0.6%(w/w). The photocatalytic degradation rate of MB in 4 h increased from 39.90% for TNTs without NaBF4 addition to 69% for B/TNTs，and their photocatalytic degradation ability is basically unchanged after using 10 times. The total organic carbon(TOC) removal rates indicated that the MB can be efficiently mineralized under visible light illumination. |
| Keywords: boron doping TiO2 nanotubes visible light photocatalytic activity |
| 投稿时间：2016-12-02 修订日期：2017-03-21 |
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| 王竹梅,朱晓玲,李月明,廖润华,沈宗洋.添加NaBF4对阳极氧化法制备TiO2纳米管光催化剂的影响[J].无机化学学报,2017,33(6):970-976. |
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