Synthesis of a novel hierarchical pillared Sep@Fe3O4/ZnAl-LDH composite for effective anionic dyes removal

被引：22

作者：

Fang, Chengqian ^{[1
]}

Liu, Wanbing ^{[2
]}

Dai, Yimin ^{[1
]}

Wang, Zhiheng ^{[1
]}

Li, Yaqi ^{[1
]}

Ling, Cai ^{[1
]}

Bo, Liu ^{[1
]}

Yang, Siwen ^{[1
]}

Wang, Junlong ^{[1
]}

Ding, Xianglong ^{[1
]}

Zhang, Yue-Fei ^{[1
]}

Yan, Li ^{[1
]}

Li, Wan ^{[1
]}

机构：

[1] Changsha Univ Sci & Technol, Sch Chem & Chem Engn, Hunan Prov Key Lab Mat Protect Elect Power & Trans, Key Lab Dongting Lake Aquat Eco Environm Control &, Changsha 410114, Peoples R China

[2] Cent Qual Technol Supervis Inspect Test Henan Ping, Pingdingshan 467000, Henan, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2023年 / 663卷

基金：

中国国家自然科学基金;

关键词：

Hierarchically pillared; Sep@Fe3O4/Zn Al-LDH composite; Nanoscale structural unit; Overall micron-scale morphology; Anionic dyes; Regeneration; LAYERED DOUBLE HYDROXIDE; ADSORPTION CAPACITY; SEPIOLITE CLAY; METHYL-ORANGE; NANOPARTICLES; DEGRADATION; RED;

D O I：

10.1016/j.colsurfa.2023.130921

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A novel magnetic hierarchically pillared Sep@Fe3O4/ZnAl-LDH composite was successfully synthesized via coprecipitation methods. The prepared Sep@Fe3O4/ZnAl-LDH composite were characterized via FTIR, XRD, XPS, SEM, TEM, BET and VSM. The results show that the Sep@Fe3O4/ZnAl-LDH composite have a hierarchical columnar structure with nanoscale structural unit (Fe3O4/ZnAl-LDH) and overall micron-scale morphology, and the obtained graded adsorbent has a large pore capacity and pore size distribution. The maximum adsorption capacities of the obtained samples for methyl orange ( MO) and Congo red ( CR) were 430 mg center dot g (-1) and 832 mg center dot g (-1), respectively. Kinetic data of MO and CR adsorbed on as-prepared samples can well fit with pseudosecond-order model. The isothermal data of MO and CR adsorbed on Sep@Fe3O4/ZnAl-LDH match well with the Langmuir model. The thermodynamic results indicate that the adsorption process is spontaneous and endothermic. Besides, the adsorbent shows good stability and reproducibility in a reusable cycle. This study demonstrated that Sep@Fe3O4/ZnAl-LDH provides a new idea for the development of a novel hierarchical magnetic pillared adsorbent for the efficient removal of anionic dyes.

引用

页数：11