Bai Xuemei, Luan Jingmin, Song Tingting, Sun Haifeng, Dai Yuhua, Yu Jianxiang, Tian Huafeng
School of New Materials and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China.
Polymers (Basel). 2023 Mar 28;15(7):1688. doi: 10.3390/polym15071688.
In this work, a series of chitosan (CS)-grafted carbon oxynitride (OCN) nanoparticles (denoted as CS-OCN) were successfully synthesized for the first time by thermal polycondensation and subsequent esterification. The structure and photocatalytic performance of CS-OCN nanoparticles were investigated. The XPS spectra of CS-OCN-3 showed the presence of amino bonds. The optimal photocatalytic degradation efficiency of the synthesized CS-OCN-3 could reach 94.3% within 390 min, while the photocurrent response intensity was about 150% more than that of pure OCN. The improved photocatalytic performance may be mainly attributed to the enhanced photogenerated carrier's separation and transportation and stronger visible light response after CS grafting. In addition, the inhibition diameter of CS-OCN-3 reached 23 mm against within 24 h under visible light irradiation, exhibiting excellent photocatalytic bactericidal ability. The results of bacterial inhibition were supported by absorbance measurements (OD600) studies of . In a word, this work provided a rational design of an efficient novel metal-free photocatalyst to remove bacterial contamination and accelerate the degradation of organic dyes.
在本工作中，首次通过热缩聚和随后的酯化反应成功合成了一系列壳聚糖（CS）接枝的碳氮氧化物（OCN）纳米颗粒（记为CS-OCN）。研究了CS-OCN纳米颗粒的结构和光催化性能。CS-OCN-3的XPS光谱表明存在氨基键。合成的CS-OCN-3的最佳光催化降解效率在390分钟内可达94.3%，而光电流响应强度比纯OCN约高150%。光催化性能的提高可能主要归因于壳聚糖接枝后光生载流子的分离和传输增强以及可见光响应增强。此外，在可见光照射下，CS-OCN-3对[具体细菌名称未给出]的抑菌圈直径在24小时内达到23毫米，表现出优异的光催化杀菌能力。细菌抑制结果得到了[细菌名称未给出]的吸光度测量（OD600）研究的支持。总之，这项工作为合理设计一种高效的新型无金属光催化剂以去除细菌污染和加速有机染料的降解提供了依据。
