靳晓敏,高利珍,王鹤峰.等离子合金化 / 热氧化复合技术制备光催化N 掺杂 TiO2 薄膜[J].表面技术,2016,45(4):25-30.
JIN Xiao-min,GAO Li-zhen,WANG He-feng.Preparation of Photocatalytic N-doped TiO2 Films by Combined Technology of Plasma Surface Alloying / Thermal Oxidation[J].Surface Technology,2016,45(4):25-30 |
| 等离子合金化 / 热氧化复合技术制备光催化N 掺杂 TiO2 薄膜 |
| Preparation of Photocatalytic N-doped TiO2 Films by Combined Technology of Plasma Surface Alloying / Thermal Oxidation |
| 投稿时间：2015-11-17 修订日期：2016-04-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.04.005 |
| 中文关键词: 等离子表面合金化 不锈钢 TiO2 薄膜 N 掺杂 光催化 亲水性 热氧化 |
| 英文关键词:plasma surface alloying stainless steel TiO2 thin films N doped photocatalysis hydrophilicity thermal oxidization |
| 基金项目:国家自然科学基金(11172195);山西省青年基金(2013021013-5);太原理工大学校青年基金(2012L073) |
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| 中文摘要: |
| 目的 提高 316L 不锈钢表面的光催化和亲水性能。 方法 通过等离子表面合金化技术在 316L不锈钢表面制备结合良好的 TiN 薄膜,然后对 TiN 薄膜进行热氧化,得到 N 掺杂 TiO2 薄膜。 利用 X 射线衍射仪、X 射线光电子能谱仪、扫描电子显微镜及紫外-可见分光光度仪对制备的 N 掺杂 TiO2 薄膜进行表征,并通过光催化实验和亲水性实验考察其光催化性能和亲水性。 结果 经过空气中 450 ℃ 氧化处理2 h 的薄膜中存在锐钛矿晶型的 TiO2,样品中的 N 元素取代了部分 O。 未掺杂 TiO2 和 N 掺杂 TiO2 的带隙宽度分别为 3. 25、3. 08 eV。 经热氧化处理后,薄膜表面致密,无裂纹和微孔,均匀分布着尺寸相近的微小凸起物。 经可见光照射 150 min 后,N 掺杂 TiO2 薄膜对亚甲基蓝溶液的最终降解率为 20% 。 此外,N掺杂 TiO2 薄膜具有较高的亲水性,可见光照射下,30 min 内接触角降为 8. 5°。 结论 N 掺杂 TiO2 薄膜能有效提高 316L 不锈钢表面的光催化和亲水性能。 |
| 英文摘要: |
| Objective To improve the photocatalytic and hydrophilic properties of 316L stainless steel surface. Methods N doped TiO2 thin films were obtained by thermal oxidation of titanium nitride films, which were prepared by plasma surface alloying on stainless steel substrate. The resultant thin films were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and ultra violet-visible absorption spectroscopy (UV-Vis) methods. The pho- tocatalytic properties and hydrophilicity of N doped TiO2 thin films were studied through photocatalysis and hydrophilicity tests. Results XRD patterns showed that anatase type TiO2 existed in the thin films after thermal oxidation at 450 ℃ in air for 2 h. According to XPS, residual N atoms partially occupied O atom sites in the TiO2 lattice. The band-gaps of TiO2 and N-doped TiO2 were 3. 25 eV and 3. 08 eV, respectively. A uniform and dense surface containing three-dimensional homogenous protuberances growth of grains was observed in SEM images of thin films after thermal oxidation. The experimental results of degradation of Methylene blue solution under visible light indicated that photocatalysis efficiency of N doped TiO2 film was better than that of the undoped film. The ultimate degradation rate of N doped TiO2 was 20% in visible irradiation for 150 min. The N doped TiO2 films showed a higher hydrophilicity and the contact angle was lowered to 8. 5° by Vis-irradiation within 30 min. Conclusion The N doped TiO2 film could effectively improve the photocatalytic and hydrophilic properties of stainless steel surface. |
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