Functionalization of cellulose nanofiber mats with phthalocyanine for decoloration of reactive dye wastewater
Functionalization of cellulose nanofiber mats with phthalocyanine for decoloration of reactive dye wastewater
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DOI：
10.1007/s10570-011-9572-5
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发表时间：
2011-10-01
期刊：
影响因子：
5.7
通讯作者：
Xu, Zhi-Kang
中科院分区：
文献类型：
--
作者：
Chen, Shi-Liang;Huang, Xiao-Jun;Xu, Zhi-Kang
报道了一种制备四氨基酞菁钴（CoPc）固定化纤维素复合材料的方法。将该功能化纤维素纳米材料作为催化剂用于活性染料废水的脱色。将醋酸纤维素电纺成纤维素膜（CA-NM），用KOH水解，然后用NaIO（4）氧化生成醛基用于CoPc的固定。采用衰减全反射傅里叶变换红外光谱（ATR/FT-IR）、X射线光电子能谱（XPS）和场发射扫描电子显微镜（FESEM）等手段对改性前后的反应过程进行了表征。我们发现这些CoPc功能化纳米纤维垫（CoPc-NM）对合成废水中的活性染料具有较高的吸附能力，当H（2）O（2）作为氧化剂存在时，可以提高活性染料的催化氧化速率。UV和GC-MS分析表明，CoPc-NMR/H（2）O（2）在90 min内可使活性艳红X-3B的降解率达90%以上，催化氧化反应不仅使偶氮键断裂，而且使活性艳红X-3B的芳香部分分解，主要产物为可生物降解的脂肪酸，如富马酸、琥珀酸和马来酸。重复测量也表明该CoPc-NM是相当稳定的，并且保持有效，催化活性没有明显降低。
A versatile method is reported for the preparation of cellulose nanofiber mats immobilized with cobalt tetraaminophthalocyanine (CoPc). This functionalized cellulose nanomaterial was used as an efficient catalyst for the decoloration of reactive dye wastewater. Cellulose acetate was electrospun into nanofiber mats (CA-NM), hydrolyzed with KOH, and then oxidized by NaIO(4) to generate aldehyde groups for CoPc immobilization. The functionalization processes on the nanofiber mats were monitored by attenuated total reflection Fourier transform infrared spectroscopy (ATR/FT-IR), X-ray photoelectron spectroscopy (XPS), and field emission scanning electron microscope (FESEM). We found these CoPc-functionalized nanofiber mats (CoPc-NM) have high adsorption capacity for reactive dye from synthetic wastewater, which enhances the catalytic oxidation rate of reactive dye when H(2)O(2) is present as oxidant. More than 90% of reactive red X-3B can be eliminated by CoPc-NM/H(2)O(2) in 90 min. UV and GC-MS analyses indicate the catalytic oxidation not only breaking the azo linkages but also decomposing the aromatic parts of reactive red X-3B, and the main products are biodegradable aliphatic acids, such as fumaric acid, succinic acid, and maleic acid, etc. Repetitive measurements also show that this CoPc-NM is quite stable and remains efficient with no obvious decrease of catalytic activity.