| 施主掺杂对BaTiO3钙钛矿半导体纳米晶光催化性能的影响 | |
| Effects of Donor-Doped on Photocatalytic Properties of BaTiO3-Based Nanoparticle | |
| 摘要: 以沉淀法制备的Cu2O为牺牲模板剂，采用水热法制备La施主掺杂的BaTiO3钙钛矿半导体纳米晶，借助X射线衍射（XRD）、透射电子显微镜（TEM）、高分辨透射电镜（HRTEM）、X射线光电子能谱（（XPS）、扫描电子显微镜（SEM）、紫外-可见漫反射光谱（UV-Vis DRS）表征La掺杂的BaTiO3晶的物相、微观形貌及光催化性能。结果表明，La掺杂BaTiO3构建了晶体缺陷，有效提高了BaTiO3的光催化性能。当掺杂量为4%（w/w）时，样品的光催化性能最好，在可见光照射360 min后，对4-硝基苯酚溶液的降解率可达到93.2%。该催化剂5次循环后的活性仍然大于86.7%，表明La施主掺杂的BaTiO3是一种有效的可见光催化剂。 | |
| 关键词: BaTiO3 施主掺杂 模板法 光催化 | |
| 基金项目: 国家自然科学基金（No.21471159）、国家级大学生创新创业计划（No.201890052006）、陕西省自然科学基金（No.2019JZ-40）、省部共建耐火材料与冶金国家重点实验室开放课题（No.G201707）、空军工程大学基础部自主立项科研（No.YNJC19070601，JK2019115）资助项目。 | |
| Abstract: Cu2O was synthesized by chemical precipitation, La doped BaTiO3-based powders were synthesized via a hydrothermal method using the Cu2O as the sacrifice template. The structure, morphology and visible light properties have been characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), high-resolution transmission electron microscope (HR-TEM), X-ray photoelectron spectroscopy (XPS), scanning electron micro-graphs (SEM), UV-Vis diffuse reflectance spectrophotometer (UV-Vis DRS). The results showed that the doping of La3+ increased the conductivity and made the range of photo-response broadened, which reduced the band gap of the semiconductor and accelerated the separation of photo-generated electron hole pairs. The surface defects were induced with a facile and effective approach by La3+ ion doping, and the photocatalytic performance of BaTiO3 was improved. However, as the doping amount of La3+ ions increased, the band gap of the semiconductors decreased and the redox ability of the phototgenerated electrons and holes deceased when the dopant was excessive. When the doping amount was 4%(w/w), the photocatalytic performance of the sample was the best, and the degradation efficiency of 4-nitrophenol was 93.2% after 360 min visible light irradiation. The decomposition rate of 4-nitrophenol was still above 86.7% even after 5 cycles, thus artificial catalytic defects of La donor-doped BaTiO3-based nanoparticle could effectively improve the photocatalytic properties. | |
| Keywords: BaTiO3 donor doping template method photocatalytic | |
| 投稿时间：2019-01-01 修订日期：2019-06-14 | |
| 摘要点击次数: 1829 | |
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| 孟国祥,田晓霞,张家瑞,张翔,韩丰庆,屈绍波.施主掺杂对BaTiO3钙钛矿半导体纳米晶光催化性能的影响[J].无机化学学报,2019,35(8):1387-1395. | |
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