| 壳聚糖/纳米铜复合微球的制备及其对刚果红染料的脱色性能 |
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| 引用本文： | 李瑞明,李瑾,钟莲,朱巧雅.壳聚糖/纳米铜复合微球的制备及其对刚果红染料的脱色性能[J].中国海洋大学学报(自然科学版),2022,52(2):77-86. |
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| 作者姓名： | 李瑞明 李瑾 钟莲 朱巧雅 |
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| 作者单位： | 中国海洋大学环境科学与工程学院,山东 青岛 266100;中国海洋大学环境科学与工程学院,山东 青岛 266100;中国海洋大学海洋环境与生态教育部重点实验室,山东 青岛 266100;中国海洋大学化学化工学院,山东 青岛 266100 |
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| 基金项目： | 国家自然科学基金项目(41106067);山东省自然科学基金项目(ZR2010BQ013)资助。 |
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| 摘 要： | 以壳聚糖和CuCl2·2H2O为原料,分别采用直接负载法和吸附法成功制备了壳聚糖/纳米铜复合微球,运用傅里叶变换红外光谱(FT-IR)、X-射线衍射(XDR)和扫描电镜(SEM)对催化剂结构进行了表征。以刚果红(CR)染料为目标污染物,评价了催化剂的制备方法、制备条件及氢转移催化反应条件对其催化性能的影响。结果表明,由直接负载法(CS/CuNPs)和吸附法(CS/CuNPs-X)制备的壳聚糖/纳米铜复合微球在CR染料浓度为100 mg/L,催化剂投加量为0.05 g,供氢体浓度为0.05 mol/L的氢转移催化反应条件下,催化反应进行180和60 min时CR脱色率可分别达95.8%和96.8%。CS/CuNPs-X比CS/CuNPs表现了更高的对CR氢转移催化反应的催化速率。两种催化剂催化还原CR染料的反应均符合准一级动力学模型。在连续循环使用10次后,CS/CuNPs和CS/CuNPs-X对CR的脱色率分别为93.9%和89.4%,表明催化剂具有良好的重复使用性能。
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| 关 键 词： | 壳聚糖 纳米铜 氢转移催化 刚果红 |
Preparation of Chitosan/Copper Nanoparticles Composite Mi crospher es and Decol ori zati on of Congo Red |
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| Li Ruiming,Li Jin,Zhong Lian,Zhu Qiaoya.Preparation of Chitosan/Copper Nanoparticles Composite Mi crospher es and Decol ori zati on of Congo Red[J].Periodical of Ocean University of China,2022,52(2):77-86. |
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| Authors: | Li Ruiming Li Jin Zhong Lian Zhu Qiaoya |
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| Institution: | (College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;The Key Laboratory of Marine Environmental and Ecology (Ocean University of China), Ministry of Education, Qingdao 266100, China;College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China) |
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| Abstract: | Based on raw materials of chitosan and CuCl2·2H2O,the chitosan/copper nanoparticles composite microspheres were successfully prepared by the direct loading method and the adsorption loading method,respectively.The catalyst structure was characterized by Fourier transform infrared(FT-IR)spectroscopy,X-ray diffraction(XDR)and scanning electron microscope(SEM).Moreover,with Congo red dye as the target pollutant,the preparation method and conditions of the catalyst as well as the effect of hydrogen transfer catalytic activity on its catalytic performance were investigated.The results showed that the decolorization rate prepared by direct loading method(CS/CuNPs)and adsorption loading method(CS/CuNPs-X)reached 95.8%and 96.8%at 180 and 60 min with the Congo red dye concentration of 100 mg/L,catalyst dosage of 0.05 g,and hydrogen donor concentration of 0.05 mol/L.In terms of hydrogen transfer catalytic activity,CS/CuNPs-X showed better catalytic rate of hydrogen transfer catalytic reaction than CS/CuNPs,and the reaction of Congo red dyes catalyzed by the two catalysts conformed to the quasi-first order kinetic model.Moreover,after being continuously reused for 10 times,the decolorization rates of CS/CuNPs and CS/CuNPs-X for Congo Red were 93.9%and 89.4%,respectively,indicating the good reusability of the two catalysts. |
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| Keywords: | chitosan copper nanoparticles hydrogen transfer catalysis Congo red |
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