| 一步合成铁氮掺杂碳纳米粒子及其可见光催化 |
| One Step Synthesis of Fe/N Co-Doped Carbon Nanoparticles for Photocatalysis |
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| 摘要: 使用柠檬酸、草酸铵作为碳源物质,三氯化铁为铁源,直接热分解法一步合成铁氮掺杂碳纳米粒子。所得的铁氮掺杂碳纳米粒子溶液在365 nm的紫外辐射下发射蓝色荧光。对铁氮掺杂碳纳米粒子进行了XRD、TEM、FTIR、FL、XPS表征。合成的铁氮掺杂碳纳米粒子分散均匀,直径大约3~5 nm。荧光光谱表明:粒子荧光性能优良,发射光谱依赖激发波长变化,具有多色性。此外,合成的掺杂碳纳米粒子溶液在长波长的可见光和红外光激发下有较好的荧光辐射,具有上转换功能。将其应用于可见光光降解亚甲基蓝MB,在MB起始浓度为20 mg·L-1,不使用氧化剂时,15 h可以使褪色率达到90%;使用过氧化氢为氧化剂,15 min可以达到97%,其光催化性能优良。对其氧化还原反应机理进行了电化学评估,评估结果与理论吻合。 |
| 关键词: 铁氮掺杂 碳纳米粒子 荧光 热分解合成 光催化 |
| 基金项目: 沈阳大学博士启动基金支持项目(No.11202127012)资助项目。 |
| Abstract: A one step method of synthesis of iron-nitrogen doped carbon nanoparticles (Fe/NCNPs) is developed by pyrolysis using citric acid and ammonium oxalate as carbon source and FeCl3 as iron source. The solution of as-prepared Fe/NCNPs emits blue fluorescent under 365 nm UV. As-prepared Fe/NCNPs are investigated by XRD, TEM, FTIR, FL and XPS. The result indicates that as-prepared Fe/NCNPs are well- dispersed with an average diameter of about 3~5 nm. Its fluorescence spectra show that the particles have excellent fluorescence performance, and with increasing excitation wavelength, the fluorescence spectra shift to longer wavelengths, which is multicolor. In addition, the solution of as-prepared Fe/NCNPs has good short wavelength optical emission with long wavelength visible and infrared light excitation, which is the up-converting function. When as-prepared Fe/NCNPs are applied to photocatalytic degradation of methylene blue (20 mg·L-1) irradiated by visible light, when the H2O2 is absent, the decolorization rate is over 90% in 15 hours; when H2O2 is present as oxidant, the decolorization rate is over 97% in 15 min, revealing excellent photocatalytic activity. The redox reaction mechanism of the photocatalytic degradation is evaluated by electrochemical method, and the result is consistent with the theory. |
| Keywords: Fe/N co-doped carbon nanoparticles fluorescence pyrolysis synthesis photocatalysis |
| 投稿时间：2015-03-31 修订日期：2015-08-27 |
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| 李洪仁,张岩,刘诗琪,李锋.一步合成铁氮掺杂碳纳米粒子及其可见光催化[J].无机化学学报,2015,31(10):1938-1945. |
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