| 金@氧缺陷二氧化钛核壳纳米颗粒的制备及光催化产氢 |
| Facile Synthesis of Core-Shell Au@H-TiO2 Nanoparticles for Photocatalytic Hydrogen-Generation |
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| 摘要: 通过水解TiCl3在金纳米颗粒外表生长TiO2，然后在Ar/H2气氛中高温煅烧成功地合成了核壳形貌的Au@H-TiO2缺陷结构。采用XRD、TEM、XPS、UV-Vis测试方法对产物的物相结构、形貌及光吸收能力做了系统的分析。与不存在缺陷态的TiO2和Au@A-TiO2相比，Au@H-TiO2表现出最高的产氢速率，这可以归因于其电荷分离效率的提高和电荷转移阻抗的降低，瞬态光电流测试以及电化学阻抗数据证实了这一结论。这些性能的改进可能与Au@H-TiO2中的Ti3+自掺杂和Au修饰有关。 |
| 关键词: 二氧化钛 缺陷结构 纳米材料 光催化制氢 |
| 基金项目: 国家自然科学基金（No.21172076）山东省泰山学者基金（No.ts201511004）资助项目。 |
| Abstract: Gold nanoparticles coated by oxygen-deficient TiO2 (Au@H-TiO2) were successfully synthesized by a slow hydrolysis of TiCl3 in the presence of gold nanoparticles, followed with a high-temperature annealing in Ar/H2. XRD patterns, TEM images, XPS spectra and UV-Vis absorption spectra were measured to reveal the crystal structure, morphology and light absorption properties of Au@H-TiO2. Compared to TiO2 and Au@A-TiO2 that is absent of oxygen deficiency, Au@H-TiO2 shows the highest photocatalytic rate for hydrogen evolution. This result could be attributed to enhanced charge-separation efficiency and reduced charge-transfer resistances, as supported by transient photocurrent response and electrochemical impedance spectra. These improvements could be correlated to Ti3+ self-doping and Au modification in Au@H-TiO2. |
| Keywords: TiO2 defective structure nanomaterials photocatalytic hydrogen generation |
| 投稿时间：2017-02-18 修订日期：2017-04-24 |
| 摘要点击次数: 2478 |
| 全文下载次数: 1983 |
| 寇书芳,封振宇,王春省,杨剑.金@氧缺陷二氧化钛核壳纳米颗粒的制备及光催化产氢[J].无机化学学报,2017,33(8):1390-1396. |
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| Support information: 相关附件： file170079 Supporting Information |
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