Zhong Xinrui, Zhang Zhang, Zhou Tuantuan, Lu Peng, Cheng Jin, Chen Sining, Shu Zhifei, Hong Yichen, Wang Qiang, Umar Ahmad
College of Environmental Science and Engineering, Beijing Forestry University, Haidian District, Beijing 100083, P. R. China.
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
J Nanosci Nanotechnol. 2018 Apr 1;18(4):2609-2615. doi: 10.1166/jnn.2018.14339.
Herein, flower-shaped ternary layered double hydroxides (LDHs) Mg3Al1-xFex-CO3 with tunable memory effect as promising adsorbents was developed for the removal of acid red 88 anionic dye. All the samples were prepared using a co-precipitation method and were thoroughly characterized using several analytical techniques. The influence of Fe/(Al + Fe) ratio on the memory effect and dye adsorption capacity of Mg3Al1-xFex-CO3 LDHs was evaluated. Among all samples, Mg3Fe0.1Al0.9CO3 LDH resulted in the best adsorption capacity of 2709 mg/g in the first cycle. Comparing to Mg3Al1-CO3 and Mg3Fe1-CO3 LDHs, it also showed much better cycling performance during 4 cycles at 30 °C and atmospheric pressure. The influence of regeneration temperature was also investigated and found that 400 °C exhibit best performance. The detailed studies demonstrated that the adsorption capacity of Mg3Al1-CO3 can be improved by partially replacing Al by Fe.
在此，开发了具有可调记忆效应的花状三元层状双氢氧化物（LDHs）Mg3Al1-xFex-CO3作为有前景的吸附剂用于去除酸性红88阴离子染料。所有样品均采用共沉淀法制备，并使用多种分析技术进行了全面表征。评估了Fe/(Al + Fe) 比例对Mg3Al1-xFex-CO3 LDHs记忆效应和染料吸附容量的影响。在所有样品中，Mg3Fe0.1Al0.9CO3 LDH在第一个循环中表现出最佳吸附容量，为2709 mg/g。与Mg3Al1-CO3和Mg3Fe1-CO3 LDHs相比，它在30°C和大气压下的4个循环中也表现出更好的循环性能。还研究了再生温度的影响，发现400°C表现出最佳性能。详细研究表明，通过用Fe部分替代Al可以提高Mg3Al1-CO3的吸附容量。
