Synthesis of nanoporous cobalt/carbon materials by a carbonized zeolitic imidazolate framework-9 and adsorption of dyes
Synthesis of nanoporous cobalt/carbon materials by a carbonized zeolitic imidazolate framework-9 and adsorption of dyes
复制标题
碳化咪唑骨架9的纳米孔钴/碳材料的合成及染料吸附
DOI：
10.1039/c7nj03745g
复制
发表时间：
2018-01-07
影响因子：
3.3
通讯作者：
Ma, Jian-Fang
中科院分区：
文献类型：
--
作者：
Han, Ting-Ting;Bai, He-Long;Ma, Jian-Fang
本文通过在600、700、800和900℃下一步煅烧咪唑骨架9（ZIF-9）沸石合成了四种纳米多孔钴/碳材料。研究了所得Z9-600、Z9-700、Z9-800和Z9-900对水溶液中亚甲基绿（MeG）的吸附性能。结果表明，与其他三种材料相比，Z9-600 表现出最大的吸附量。系统研究了Z9-600对另外11种有机染料（孔雀石绿、罗丹明B、罗丹明6G、结晶紫、甲基蓝、甲基橙、酸性红18、酸性橙7、橙G、刚果红、玫瑰苯胺）的吸附能力。基于数据的有效分析表明，准二阶模型、颗粒内扩散模型和Langmuir模型适合描述Z9-600的吸附过程。 Z9-600重复使用4次后，MeG的再生效率为493%。这些高效、经济且可回收的特性表明，纳米多孔钴/碳 ZIF 是处理含染料废水的有前景的吸附剂。
Herein, four nanoporous cobalt/carbon materials were synthesized by one-step calcination of the zeolitic imidazolate framework-9 (ZIF-9) at 600, 700, 800, and 900 degrees C. The adsorption performance of the obtained Z9-600, Z9-700, Z9-800, and Z9-900 towards methylene green (MeG) in an aqueous solution was investigated. The results indicate that Z9-600 demonstrates maximum adsorption as compared to other three materials. The adsorption capacity of Z9-600 for another eleven organic dyes (malachite green, rhodamine B, rhodamine 6G, crystal violet, methyl blue, methyl orange, acid red 18, acid orange 7, orange G, congo red, and rosaniline) was studied systematically. Valid analysis based on the data demonstrates that the pseudo-second-order model, the intra-particle diffusion model, and the Langmuir model are suitable for describing the adsorption process of Z9-600. The regeneration efficiency of Z9-600 for MeG is 493% after 4 cycles of reuse. These highly-effective, economical, and recyclable features demonstrate that nanoporous cobalt/carbon ZIFs are promising adsorbents for the treatment of wastewater containing dyes.