Electrostatically Spun Fabrication of Fe3O4@SiO2/PVA Membranes for Efficient Methyl Orange (MO) Adsorption and Response Surface Optimization of the Processes.
{"title":"Electrostatically Spun Fabrication of Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/PVA Membranes for Efficient Methyl Orange (MO) Adsorption and Response Surface Optimization of the Processes.","authors":"Heng Li, Chengzhong Zhang, Huanhuan Jin, Shuai Wang, Ruixin Li, Zhen Zhang","doi":"10.1021/acs.langmuir.4c02266","DOIUrl":null,"url":null,"abstract":"<p><p>The environmental pollution problem caused by azo dyes urgently needs to be solved. Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/poly(vinyl alcohol) (PVA) membranes were prepared via an electrostatic spinning process. By blending the prepared Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> nanoparticles with PVA, a uniform distribution of Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> nanoparticles within the fibers was achieved, effectively preventing the aggregation of the nanoparticles and demonstrating excellent adsorption performance toward the azo anionic dye methyl orange (MO). The adsorption isotherms and kinetic data for Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/PVA adsorbed MO were consistent with Langmuir and the pseudo-second-order model, respectively. Owing to the electrostatic attraction, hydrogen bonding, and pore-filling effect, Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/PVA effectively removed MO from water, with a maximum adsorption amount of 349.896 mg/g at 25 °C. Very importantly, the Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/PVA membrane can be regenerated and reused efficiently, with no significant decrease in adsorption capacity after five adsorption cycles. In addition, response surface methodology (RSM) was used to analyze the effects of various factors on the MO adsorption performance of Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/PVA membranes, as well as the interactions of various factors. This research indicated that Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/PVA membranes are promising adsorbents for MO due to their low cost, ease of regeneration, and environmental friendliness.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":null,"pages":null},"PeriodicalIF":3.7000,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Langmuir","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acs.langmuir.4c02266","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/9/5 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The environmental pollution problem caused by azo dyes urgently needs to be solved. Fe3O4@SiO2/poly(vinyl alcohol) (PVA) membranes were prepared via an electrostatic spinning process. By blending the prepared Fe3O4@SiO2 nanoparticles with PVA, a uniform distribution of Fe3O4@SiO2 nanoparticles within the fibers was achieved, effectively preventing the aggregation of the nanoparticles and demonstrating excellent adsorption performance toward the azo anionic dye methyl orange (MO). The adsorption isotherms and kinetic data for Fe3O4@SiO2/PVA adsorbed MO were consistent with Langmuir and the pseudo-second-order model, respectively. Owing to the electrostatic attraction, hydrogen bonding, and pore-filling effect, Fe3O4@SiO2/PVA effectively removed MO from water, with a maximum adsorption amount of 349.896 mg/g at 25 °C. Very importantly, the Fe3O4@SiO2/PVA membrane can be regenerated and reused efficiently, with no significant decrease in adsorption capacity after five adsorption cycles. In addition, response surface methodology (RSM) was used to analyze the effects of various factors on the MO adsorption performance of Fe3O4@SiO2/PVA membranes, as well as the interactions of various factors. This research indicated that Fe3O4@SiO2/PVA membranes are promising adsorbents for MO due to their low cost, ease of regeneration, and environmental friendliness.
期刊介绍:
Langmuir is an interdisciplinary journal publishing articles in the following subject categories:
Colloids: surfactants and self-assembly, dispersions, emulsions, foams
Interfaces: adsorption, reactions, films, forces
Biological Interfaces: biocolloids, biomolecular and biomimetic materials
Materials: nano- and mesostructured materials, polymers, gels, liquid crystals
Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry
Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals
However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do?
Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*.
This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).