| 炭球修饰g-C3N4材料的制备及其可见光光催化性能 |
| Synthesis and Visible-Light Photocatalytic Activity of Carbon Spheres Decorated g-C3N4 Composites |
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| 摘要: 利用水热法以葡萄糖和氮化碳（g-C3N4）为原料，成功地制备了炭球修饰氮化碳（C/g-C3N4）复合型光催化剂。通过X射线粉末衍射、扫描电镜、N2吸附-脱附、紫外可见漫反射、表面光电压和电子顺磁共振分别对样品的结构、组成、形貌、比表面积和光学性能进行了表征。结果显示：直径约20 nm的炭球紧密地排列于g-C3N4表层，当葡萄糖与g-C3N4用量比（质量分数）为1%时，复合催化剂1% C/g-C3N4的光催化性能最好。C/g-C3N4与单一g-C3N4相比，不仅比表面积明显增大，还扩展了可见光的响应范围，且提高了催化剂光生电子与空穴的分离效率。在400 W金卤灯照射下，光线通过420 nm滤光片后，在80 min内1% C/g-C3N4对10 μmol·L-1的罗丹明B降解率高达87%，是纯g-C3N4在同样条件下催化性能的3倍，且稳定性良好。 |
| 关键词: 光催化 复合 炭球 氮化碳 罗丹明 |
| 基金项目: 四川理工学院人才引进项目（No.2017RCL01，2020RC11）和四川省教育厅重大培育项目（No.17CZ0024）资助。 |
| Abstract: A kind of carbon spheres decorated carbon nitride (C/g-C3N4) composite photocatalysts were successfully synthesized by hydrothermal method using glucose and g-C3N4 as raw materials. The structure, composition, morphology, specific surface area and optical properties of these photocatalysts were fully characterized by X-ray powder diffraction, scanning electron microscope, N2 adsorption-desorption, ultraviolet-visible diffuse reflectance spectroscopy, surface photovoltage spectroscopy and electron paramagnetic resonance. The results showed that the carbon spheres with a diameter of about 20 nm were tightly present on the surface of g-C3N4. When the dosage ratio of glucose to g-C3N4 (mass fraction) was 1%, the composite photocatalyst was the best catalyst. Compared with g-C3N4, the specific surface area of g-C3N4 with 1% C (1% C/g-C3N4) was significantly increased, the visible light response range was expanded, and the separation efficiency of photogenerated electrons and holes of the catalyst was also improved. In addition, under the irradiation of a 400 W metal halide lamp with 420 nm filter, 87% of rhodamine B (10 μmol·L-1) could be fully degraded by 1% C/g-C3N4 composite photocatalyst within 80 min. The efficiency of this catalyst was three times that of pure g-C3N4 under the same conditions and its stability was also good. |
| Keywords: photocatalysis composite carbon sphere g-C3N4 rhodamine B |
| 投稿时间：2020-10-08 修订日期：2021-04-15 |
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| 郭永平,桂明生,周金龙,杨丽.炭球修饰g-C3N4材料的制备及其可见光光催化性能[J].无机化学学报,2021,37(6):977-983. |
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