Nanoscale-confined precursor of CuFe2O4 mediated by hyperbranched polyamide as an unusual heterogeneous Fenton catalyst for efficient dye degradation
Nanoscale-confined precursor of CuFe2O4 mediated by hyperbranched polyamide as an unusual heterogeneous Fenton catalyst for efficient dye degradation
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DOI：
10.1016/j.jclepro.2018.03.134
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发表时间：
2018-06
影响因子：
11.1
通讯作者：
Deyou Yu;H. Ni;Lili Wang;Minghua Wu;Xiaosu Yang
中科院分区：
文献类型：
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作者：
Deyou Yu;H. Ni;Lili Wang;Minghua Wu;Xiaosu Yang
染料废水对环境造成了严重的影响，受到世界各国的广泛关注。CuFe 2 O 4基多相芬顿氧化法被认为是一种有效的染料废水处理方法。但CuFe 2 O 4的高温煅烧使得该技术的适用性较差。本研究采用共沉淀法，在超支化聚酰胺（MHP）的约束下制备了纳米尺寸的CuFe 2 O 4（NCFOH）前驱体，并通过X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、扫描电镜（SEM）、透射电镜（TEM）和比表面积（BET）等手段对前驱体进行了表征。并对其催化降解染料的性能进行了测试。尽管NCFOH具有非晶态结构，但其催化性能远强于未经MHP介导的CuFe_2O_4（CFOH）和煅烧的CuFe_2O_4（CFO）。此外，NCFOH甚至显示出与相应的煅烧（NCFO）类似的催化能力。结果表明，颗粒尺寸和比表面积可能比晶体结构在催化性能中起更重要的作用。此外，循环实验表明NCFOH作为可重复使用的催化剂用于染料废水处理的高稳定性和适用性。这项工作表明，NCFOH具有广泛的商业化的潜力，作为一个优秀的非均相芬顿催化剂，也提供了更深入的见解到新的纳米尺度限制的方法，用于制造低成本和高效的催化剂。
Dye effluent causes a serious problem to the environment and is of a great concern worldwide. CuFe2O4-based heterogeneous Fenton oxidation is considered as a promising approach for efficient dye effluent treatment. However, the high-temperature calcination of CuFe2O4makes this technique less applicability. In this study, nanoscale-confined precursor of CuFe2O4(NCFOH) was fabricatedviaa facile coprecipitation method with the confinement of hyperbranched polyamide (MHP) and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and BET measurement. Its catalytic performance for dye degradation was also tested. Despite of its amorphous structure, NCFOH possesses a much stronger catalytic performance than the precursor of CuFe2O4(CFOH) and calcined CuFe2O4(CFO) without the mediation of MHP. In addition, NCFOH even shows a similarly catalytic ability with the corresponding calcination (NCFO). The results reveal that particle size and specific surface area may play more important roles than crystalline structure in the catalytic performance. Furthermore, the cycling experiments suggest the high stability and applicability of NCFOH as a reusable catalyst for dye effluent treatment. This work demonstrates that the NCFOH has a potential of widespread commercialization as an excellent heterogeneous Fenton catalyst, and also provides deeper insights into the novel nanoscale-confined approach for fabricating low-cost and efficient catalysts.