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甲壳素复合石墨相氮化碳的制备及光催化杀菌性能

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余致汐, 贺南南, 陈欢, 江芳. 甲壳素复合石墨相氮化碳的制备及光催化杀菌性能[J]. 环境化学, 2020, (5): 1271-1278. doi: 10.7524/j.issn.0254-6108.2019081206
引用本文: 余致汐, 贺南南, 陈欢, 江芳. 甲壳素复合石墨相氮化碳的制备及光催化杀菌性能[J]. 环境化学, 2020, (5): 1271-1278. doi: 10.7524/j.issn.0254-6108.2019081206
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YU Zhixi, HE Nannan, CHEN Huan, JIANG Fang. Preparation of chitin composite graphite phase carbonitride and its photocatalytic sterilization performance[J]. Environmental Chemistry, 2020, (5): 1271-1278. doi: 10.7524/j.issn.0254-6108.2019081206
Citation: YU Zhixi, HE Nannan, CHEN Huan, JIANG Fang. Preparation of chitin composite graphite phase carbonitride and its photocatalytic sterilization performance[J]. Environmental Chemistry, 2020, (5): 1271-1278. doi: 10.7524/j.issn.0254-6108.2019081206
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甲壳素复合石墨相氮化碳的制备及光催化杀菌性能

  • 南京理工大学环境与生物工程学院, 南京, 210094

    • 通讯作者: 江芳, E-mail: fjiang@njust.edu.cn
  • 基金项目:

    国家自然科学基金（51778295，51678306）资助.

Preparation of chitin composite graphite phase carbonitride and its photocatalytic sterilization performance

  • School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China

    • Corresponding author: JIANG Fang, fjiang@njust.edu.cn
  • Fund Project: Supported by the National Natural Science Foundation of China (51778295,51678306).

  • 摘要: 本文采用水热法制备了甲壳素（Chitin）和石墨相氮化碳（g-C3N4）复合材料Chitin-CN，并采用XRD、SEM、XPS、光电流及阻抗分析等手段对其进行物化特性分析.与g-C3N4相比，Chitin-CN复合材料的光生电子-空穴对的分离效率较高，甲壳素（Chitin）含量为0.2 g的Chitin-CN材料在模拟太阳光照射下对大肠杆菌K-12表现出最佳的光催化杀菌效率，在2 h内可完全杀死6.5 lg cfu·mL-1的大肠杆菌K-12.Chitin-CN的破碎结构暴露了更多的活性位点，甲壳素的加入提高了光生载流子的分离率，从而促进了复合材料光催化杀菌的性能.捕获实验表明超氧自由基（·O2-）和空穴（h+）是Chitin-CN作用于大肠杆菌K-12的主要活性物种.
    Abstract: A composite material (Chitin-CN) of chitin and graphite carbon nitride (g-C3N4) was prepared by hydrothermal method in this paper. The morphology and chemical structure of Chitin-CN were characterized by XRD, SEM and XPS. Compared to g-C3N4, the separation efficiency of photogenerated electron-hole pairs in Chitin-CN were much higher. The 0.2 Chitin-CN composite exhibited a significantly enhanced activity for the visible-light photocatalytic treatment of Escherichia coli K-12 under simulated sunlight irradiation, completely degrading 6.5 lg cfu·mL-1 of E. coli K-12 within 2 hours. The promoted photocatalytic activity was attributed to more active sites and enhanced charge separation efficiency of 0.2 Chitin-CN. The superoxide radicals (·O2-) and holes (h+) were found to be the dominant active species for photocatalytic treatment of E. coli K-12.
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  • 收稿日期:  2019-08-12

甲壳素复合石墨相氮化碳的制备及光催化杀菌性能

    通讯作者: 江芳, E-mail: fjiang@njust.edu.cn
  • 南京理工大学环境与生物工程学院, 南京, 210094
  • 收稿日期:  2019-08-12
基金项目:

国家自然科学基金（51778295，51678306）资助.

摘要: 本文采用水热法制备了甲壳素（Chitin）和石墨相氮化碳（g-C3N4）复合材料Chitin-CN，并采用XRD、SEM、XPS、光电流及阻抗分析等手段对其进行物化特性分析.与g-C3N4相比，Chitin-CN复合材料的光生电子-空穴对的分离效率较高，甲壳素（Chitin）含量为0.2 g的Chitin-CN材料在模拟太阳光照射下对大肠杆菌K-12表现出最佳的光催化杀菌效率，在2 h内可完全杀死6.5 lg cfu·mL-1的大肠杆菌K-12.Chitin-CN的破碎结构暴露了更多的活性位点，甲壳素的加入提高了光生载流子的分离率，从而促进了复合材料光催化杀菌的性能.捕获实验表明超氧自由基（·O2-）和空穴（h+）是Chitin-CN作用于大肠杆菌K-12的主要活性物种.

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