| 任彦荣,沈金凤,杨军,全纹萱,曾寒露,刁悦,蒲红争,胡颖,王星雅,李园园.化学通报,2021,84(7):709-714. |
| 原位制备SrSb2O6/g-C3N4新型二维异质结用于可见光催化降解四环素的研究 |
| In-site Preparation of Novel Two Dimensional Heterjunction SrSb2O6/g-C3N4 for the Photodegradation of Tetracycline under Visible Light Irradiation |
| 投稿时间：2020-12-10 修订日期：2021-01-10 |
| DOI： |
| 中文关键词: 二维异质结 光催化 可见光 四环素 |
| 英文关键词:Two dimensional heterojunction, Photocatalysis, Visible light, Tetracycline |
| 基金项目:重庆市教委科学技术研究项目(KJQN202001613)、重庆第二师范学院博士启动基金项目(2017BSRC001)、教育部学校规划建设发展中心重庆第二师范学院儿童研究院重点资助项目(CSDP19FS01109)和重庆第二师范学院大学生科研项目(KY20200138,KY20200139)资助 |
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| 中文摘要: |
| 本文采用高温固相原位制备新型二维SrSb2O6/g-C3N4异质结光催化复合材料,并将其用于可见光催化降解四环素的研究。通过粉末X射线多晶衍射和傅里叶红外反射光谱对其结构进行表征。光催化降解实验表明,异质结复合材料较母体g-C3N4和SrSb2O6而言,光催化效率均得到了提升。其中,异质结样品SSO-CN-2对四环素溶液具有最优的光催化降解效率,其降解率在240 min内达到62%,分别是母体g-C3N4和SrSb2O6的2.5和46倍。光催化动力学实验表明其降解曲线符合赝一级动力学模型,速率常数为0.00392 min-1。进一步,循环实验表明,在异质结样品具有较高的光催化降解和结构稳定性。活性自由基捕获实验表明超氧自由基负离子()是主要催化反应活性物种,光催化机理可用半导体异质结Type-II类型得到解释。 |
| 英文摘要: |
| In this paper, novel two-dimensional SrSb2O6/g-C3N4 heterojunction was prepared by solid-state method, and the as-prepared photocatalysts were applied to evaluated the photodegradation of tetracycline. The phase of the as-synthesized samples was characterized by powder X-ray diffraction and Fourier Transform Infrared Reflectance Spectroscopy. The results of the photocatalytic degradation indicate that the photocatalytic performance of heterojunction is higher than that of parent compound g-C3N4 and SrSb2O6. Among them, the heterojunction named SSO-CN-2 exhibits the best performance and the photodegradation rate achieves 62% in 240 min, which is 2.5 and 46 times as compared with g-C3N4 and SrSb2O6. The mechanism of photocatalytic degradation could be described by a pseudo first order kinetic model, and the fitted rate constant was 0.00392 min-1 for sample SSO-CN-2. The cycling runs demonstrated that the stability of photodegradation and phase. Finally, the active free radical trappinge experiment revealed that the superoxide radical anion (?O2-) is the main active species. The photocatalytic process could well be explained by mechanism of heterojunction Type-II. |
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