Preparation of an antibacterial chitosan-coated biochar-nanosilver composite for drinking water purification
Preparation of an antibacterial chitosan-coated biochar-nanosilver composite for drinking water purification
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DOI：
10.1016/j.carbpol.2019.05.017
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发表时间：
2019-09-01
影响因子：
11.2
通讯作者：
Li, Yue
中科院分区：
文献类型：
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作者：
Hu, Zhihui;Zhang, Liang;Li, Yue
由于饮用水中的致病菌引起的各种疾病，微生物污染已经发展成为困扰人们的威胁生命的问题。因此，开发新型抗菌材料是一个迫切的需求。以玉米秸秆为碳源，采用高温炭化法制备生物炭-纳米银（C-Ag），并在其表面包覆壳聚糖（CTS），制备了CTS/C-Ag抗菌复合材料。FT-IR、XRD、SEM和TG-DSC分析结果表明，壳聚糖在生物炭负载球形银纳米粒子的复合材料表面包覆了壳聚糖。采用平板计数法研究了壳聚糖/碳银复合材料对大肠杆菌的抗菌活性。结果表明，该复合材料对大肠杆菌（E. coli）具有良好的抗菌活性。杆菌在本应用研究中，证明了CTS/C-Ag复合材料具有可持续的抗菌活性和良好的饮用水可重复使用性。因此，CTS/C-Ag复合材料在饮用水处理中具有潜在的应用价值。
Microbial contamination has evolved as a life-threatening problem afflicting people due to various diseases caused by pathogenic bacteria in drinking water. Thus developing novel antibacterial materials is an urgent need. Herein, a chitosan (CTS)/ biochar-nanosilver (C-Ag) antibacterial composite was prepared by a method of CTS-coated on C-Ag obtained through a facile high-temperature carbonization process using corn straw as the carbon substrate. The results from FT-IR, XRD, SEM and TG-DSC revealed that the biochar loading spherical silver nanoparticles was coated with CTS in the composite. The antibacterial activity of the CTS/C-Ag composite was investigated using the plate counting method with Escherichia coli (E. coli), and the results suggest that the composite exhibited excellent antibacterial activity against E. coli. In this application study, it was proven that the CTS/C-Ag composite exhibits sustainable antibacterial activity and good reusability for drinking water. Therefore, the CTS/C-Ag composite has potential application in drinking water treatment.