| 碳纳米粒子：合成及可见光催化降解萘酚绿 |
| Carbon Nanoparticles：Synthesis and Degradation of Naphthol Green under Visible Light Irradiation |
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| 摘要: 以酒石酸和酪氨酸为起始反应物，乙二醇为溶剂，采用溶剂热法一步合成了高发光强度的碳纳米粒子。利用XRD、TEM、FTIR和荧光光谱对碳纳米粒子的物相、形貌和粒径、表面基团及发光性能进行了表征。结果表明，合成的碳纳米粒子为粒径分布集中的球形，粒径10~30 nm，分散性好，表面富含-COOH、-OH等官能团，具有激发波长依赖的光致发光特性。考察了反应温度、酒石酸与酪氨酸质量比对碳纳米粒子发光性能的影响。研究了碳纳米粒子/H2O2催化体系对萘酚绿的降解性能，结果表明：130 mg·L-1的萘酚绿溶液，可见光照射3.5 h降解率可以达到96%。荧光光谱法表征指明降解过程中有羟基自由基生成。 |
| 关键词: 碳纳米粒子 溶剂热法 发光 光催化 |
| 基金项目: 国家自然科学基金（No.51272162），沈阳市科技局（No.F12-277-1-50）资助项目。 |
| Abstract: Strong photoluminescent carbon nanoparticles (CNPs) were synthesized by one-pot solvothermal method using tartaric acid and tyrosine as starting materials and ethylene glycol as solvent. The as-prepared CNPs were characterized by XRD, TEM, FTIR and fluorescence spectroscopy (FL). The results show that the CNPs are well dispersed and narrowly distributed amorphous and spherical particles with diameter of 10~30 nm. The CNPs are rich in hydroxyl and carboxyl groups on the surface with highly hydrophilic nature. The emission wavelength of CNPs depends on the excitation wavelength. The effects of reaction temperature and the mass ratio of tartaric acid to tyrosine on emission intensity of the CNPs were also investigated. The CNPs also show excellent photocatalytic performance for photodegradation of naphthol green(NG) under visible light in the presence of H2O2. The results indicate that the degradation efficiency of NG reaches 96% with initial concentration of 130 mg·L-1 within 3.5 h. The hydroxyl radicals (·OH) are detected in the reaction. |
| Keywords: carbon nanoparticles solvothermal method luminescence photocatalysis |
| 投稿时间：2013-12-12 修订日期：2014-05-18 |
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| 李锋,王桂燕,李永波,赵军,李洪仁.碳纳米粒子：合成及可见光催化降解萘酚绿[J].无机化学学报,2014,30(8):1783-1789. |
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