Chen Ye, Tian Miao, Liu Xupo
School of Materials Science and Engineering, Henan Engineering Research Center of Design and Recycle for Advanced Electrochemical Energy Storage Materials, Henan Normal University, Xinxiang 453007, China.
Nanomaterials (Basel). 2022 Aug 17;12(16):2821. doi: 10.3390/nano12162821.
The electro-Fenton (EF) process is regarded as an efficient and promising sewage disposal technique for sustainable water environment protection. However, current developments in EF are largely restricted by cathode electrocatalysts. Herein, a supramolecular self-assembly strategy is adopted for synthetization, based on melamine-cyanuric acid (MCA) supramolecular aggregates integrated with carbon fixation using 5-aminosalicylic acid and zinc acetylacetonate hydrate. The prepared carbon materials characterize an ordered lamellar microstructure, high specific surface area (595 m g), broad mesoporous distribution (433 nm) and high N doping (19.62%). Such features result from the intrinsic superiority of hydrogen-bonded MCA supramolecular aggregates via the specific molecular assembly process. Accordingly, noteworthy activity and selectivity of HO production (190.0 mg L with 2 h) are achieved. Excellent mineralization is declared for optimized carbon material in several organic pollutants, namely, basic fuchsin, chloramphenicol, phenol and several mixed triphenylmethane-type dyestuffs, with total organic carbon removal of 87.5%, 74.8%, 55.7% and 54.2% within 8 h, respectively. This work offers a valuable insight into facilitating the application of supramolecular-derived carbon materials for extensive EF degradation.
电芬顿（EF）工艺被认为是一种高效且有前景的污水处理技术，可用于可持续的环境保护。然而，目前EF工艺的发展在很大程度上受到阴极电催化剂的限制。在此，采用一种超分子自组装策略进行合成，该策略基于三聚氰胺 - 氰尿酸（MCA）超分子聚集体，并结合使用5 - 氨基水杨酸和乙酰丙酮锌水合物进行碳固定。制备的碳材料具有有序的层状微观结构、高比表面积（595 m²/g）、宽泛的中孔分布（4~33 nm）和高氮掺杂（19.62%）。这些特性源于通过特定分子组装过程形成的氢键连接的MCA超分子聚集体的内在优势。因此，实现了显著的羟基自由基（·OH）生成活性和选择性（2小时内约190.0 mg/L）。对于优化后的碳材料，在几种有机污染物（即碱性品红、氯霉素、苯酚和几种混合的三苯甲烷类染料）中表现出优异的矿化效果，在8小时内总有机碳去除率分别为87.5%、74.8%、55.7%和54.2%。这项工作为促进超分子衍生碳材料在广泛的EF降解中的应用提供了有价值的见解。
