Yao Yunjin, Zhang Jie, Wu Guodong, Wang Shaobin, Hu Yi, Su Cong, Xu Tongwen
Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei, 230009, China.
CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, School of Chemistry and Material Science, University of Science and Technology of China, Hefei, 230026, China.
Environ Sci Pollut Res Int. 2017 Mar;24(8):7679-7692. doi: 10.1007/s11356-017-8440-8. Epub 2017 Jan 25.
Novel iron encapsulated in nitrogen-doped carbon nanotubes (CNTs) supported on porous carbon (Fe@N-C) 3D structured materials for degrading organic pollutants were fabricated from a renewable, low-cost biomass, melamine, and iron salt as the precursors. SEM and TEM micrographs show that iron encapsulated bamboo shaped CNTs are vertically standing on carbon sheets, and thus, a 3D hybrid was formed. The catalytic activities of the prepared samples were thoroughly evaluated by activation of peroxymonosulfate for catalytic oxidation of Orange II solutions. The influences of some reaction conditions (pH, temperature, and concentrations of reactants, peroxymonosulfate, and dye) were extensively evaluated. It was revealed that the adsorption could enrich the pollutant which was then rapidly degraded by the catalytically generated radicals, accelerating the continuous adsorption of residual pollutant. Remarkable carbon structure, introduction of CNTs, and N/Fe doping result in promoted adsorption capability and catalytic performances. Due to the simple synthetic process and cheap carbon precursor, Fe@N-C 3D hybrid can be easily scaled up and promote the development of Fenton-like catalysts.
以可再生、低成本生物质三聚氰胺和铁盐为前驱体制备了负载于多孔碳上的新型氮掺杂碳纳米管包裹铁（Fe@N-C）三维结构材料，用于降解有机污染物。扫描电子显微镜（SEM）和透射电子显微镜（TEM）照片显示，铁包裹的竹状碳纳米管垂直立在碳片上，从而形成了三维杂化材料。通过活化过一硫酸盐催化氧化橙黄II溶液，对制备样品的催化活性进行了全面评估。广泛评估了一些反应条件（pH值、温度以及反应物、过一硫酸盐和染料的浓度）的影响。结果表明，吸附作用可富集污染物，随后污染物被催化产生的自由基迅速降解，从而加速了对残留污染物的持续吸附。显著的碳结构、碳纳米管的引入以及氮/铁掺杂导致吸附能力和催化性能得到提升。由于合成过程简单且碳前驱体廉价，Fe@N-C三维杂化材料易于放大规模，推动类芬顿催化剂的发展。
