Article
Chemistry, Analytical
Weini Zhou, Hongqing Wang, Sanying Hou, Shiyv Wang
Summary: A magnetic nano-composites Fe3O4@SiO2@MnO2 was prepared for efficient removal of Th(IV) from aqueous solutions, achieving a maximum adsorption capacity of 53.19 mg g(-1) at pH = 3.5 and T = 298 K. The adsorption kinetics followed the second-order kinetic model, and the adsorption isotherm was well described by the Langmuir model, with lattice oxygen (M-O) and surface hydroxyl oxygen (M-OH) participating in the adsorption process. This material shows promise as a potential material for removing Th(IV) from environmental wastewater.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Physical
Qichen Li, Jun Liao, Siqi Huang, Ling Ding, Yong Zhang, Wenkun Zhu
Summary: Porous Al2O3-SiO2 composite materials were constructed and proved to be efficient and reusable adsorbents for Th(IV) removal in aqueous solution with high adsorption capacity and maintenance of over 90% efficiency after multiple cycles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Polymer Science
Yiling Zhi, Guojian Duan, Zhiwei Lei, Hui Chen, Haobo Zhang, Huining Tian, Tonghuan Liu
Summary: In this study, amidoxime cellulose (AO-CELL) was synthesized and used as an adsorbent for selective extraction of low-concentration Th(IV) from wastewater. The results showed that AO-CELL had good adsorption capacity and selectivity for Th(IV), as well as excellent reusability. This research has significant practical application value.
Article
Materials Science, Multidisciplinary
Mohammad Jafar Molaei, Esmaeil Salimi
Summary: In this research, magneto-fluorescent nanohybrids were synthesized using Fe3O4@SiO2 superparamagnetic nanoparticles as a platform for drug delivery systems. The nanohybrids were coated with alginate and combined with N-doped carbon quantum dots (CQDs). The synthesized nanohybrids exhibited high drug loading and release efficiency, making them a promising candidate for simultaneous drug delivery and bioimaging, especially in tumor environments.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Yuya Ishizaki, Shunsuke Yamamoto, Tokuji Miyashita, Masaya Mitsuishi
Summary: This study demonstrates selective ion permeation in surface-functionalized ultrathin NP SiO2 films under acidic pH conditions, paving the way for new applications in molecular separation and sensing based on ultrathin nanoporous films.
Article
Chemistry, Multidisciplinary
Ghani Ur Rehman, Muhammad Tahir, Pei Sean Goh, Ahmad Fauzi Ismail, Asif Hafeez, Imran Ullah Khan
Summary: A binary nanocomposite of Fe3O4@SiO2 was synthesized as an active photocatalyst for phenol degradation under UV irradiation. The efficiency of the photocatalysts steadily increased over time, achieving a phenol degradation efficacy of 84%. The newly prepared materials can be effectively recycled through a simple magnetic separation method.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Biotechnology & Applied Microbiology
Dominik Pilnaj, Pavel Kuran, Martin St'astny, Vera Pilaffova, Pavel Janos, Martin Kormunda, Jonas Tokarsky
Summary: Magnetic sorbents are promising materials for environmental applications due to their unique properties. Fe3O4/SiO2-C18 samples demonstrate high efficiency and excellent performance in adsorbing and removing polycyclic aromatic hydrocarbons, making them suitable for pre-concentration purposes of PAHs in analytical sample extractions from water.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Environmental
Cetin Gungor, Mehmet Sakir Ece
Summary: In this study, new magnetic nanoadsorbents (MNAs) were synthesized and used for the removal of volatile organic compounds (VOCs). The MNAs showed high adsorption capacity and reuse efficiency, making them promising adsorbents for the efficient removal of benzene, xylene, and ethylbenzene.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Chun-Rong Lin, Oxana S. Ivanova, Dmitry A. Petrov, Alexey E. Sokolov, Ying-Zhen Chen, Marina A. Gerasimova, Sergey M. Zharkov, Yaw-Teng Tseng, Nicolay P. Shestakov, Irina S. Edelman
Summary: Fe3O4@SiO2 core-shell nanoparticles were synthesized and functionalized for studying their magnetic, structural, and adsorption properties. The magnetic core of the nanoparticles showed nanocrystalline structure with an amorphous silica shell, and the nanoparticles exhibited high saturation magnetization. The adsorption studies on three dyes showed that the nanoparticles followed pseudo-second order kinetics and had maximum adsorption capacity for Congo red according to the Langmuir isotherm.
Article
Chemistry, Multidisciplinary
Dinesh Kumar, Harpreet Singh, Atul Jain, Vamika Sharma, Neha Bhardwaj, Sanjeev Puri, Madhu Khatri
Summary: In this study, magnetic nanoparticles (Fe3O4 NPs) functionalized with silica (SiO2) and 2, 3-dimercaptosuccinic acid (DMSA) were synthesized. The prepared DMSA@SiO2@Fe3O4 nanocomposite showed excellent performance in removing Cu2+ from aqueous solutions, with good dispersibility, stability, and magnetization. By using Box-Behnken design and response surface methodology, the optimal conditions for Cu2+ removal were determined, and it was found that the adsorption process followed pseudo-first-order kinetics and Langmuir isotherm. This design method can be applied to various environmental applications.
Article
Engineering, Environmental
Zhengwen Wei, Xuedong Ma, Yaoyao Zhang, Yingmin Guo, Wei Wang, Zhen-Yi Jiang
Summary: The Fe3O4-SiO2-2DMDPS nanocomposite showed excellent adsorption performance towards PHE, maintaining 75.97% adsorption capacity after four regeneration cycles. Homogeneous adsorption played a crucial role in the entire adsorption process, with film diffusion being the rate controlling procedure.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Zhenzhen Liu, Huiyu Zhao, Jiao Wang, Zhiwei Wang, Shanshan Di, Hao Xu, Qiang Wang, Xinquan Wang, Peipei Qi
Summary: A biosafe magnetic Fe3O4@SiO2@Salg (GMS) adsorbent was successfully developed for removing organophosphorus pesticides (OPPs) from water bodies. The GMS showed excellent removal efficiencies for 18 OPPs in tap, river, and seawater, with maintained efficiencies after eight cycles of recycling. The adsorption process was fitted well with the Langmuir isotherm and pseudo-second-order models, indicating chemisorption as the dominant mechanism.
Article
Agricultural Engineering
Bahar Ghasemzadeh, Amir Abbas Matin, Biuck Habibi, Mostafa Ebadi
Summary: This research aims to design and prepare a new magnetically recoverable catalyst based on agrowastes, specifically cotton waste, for the production of biodiesel. The proposed core-shell nanocomposite catalyst showed excellent performance in catalyzing transesterification reaction and achieved optimal results under certain conditions.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Materials Science, Multidisciplinary
Bahar Ghasemzadeh, Amir Abbas Matin, Biuck Habibi, Mostafa Ebadi
Summary: The aim of this research is to develop magnetically recoverable Heteropoly acid (HPA) based catalyst (Rubber-Fe3O4@SiO2@H3PMo12O40) for biodiesel production. The proposed catalyst, prepared by coating magnetic rubber powder with silica and impregnating it with phosphomolybdic acid, showed a Keggin structure. The performance of the catalyst in transesterification reaction was optimized, with the best conditions being 3w/w % catalyst dosage, 3 h reaction time, 12:1 molar ratio of methanol to oil, and 69 degrees C reaction temperature. The production yield was over 85% for four runs and slightly decreased to 78.87% on the fifth try.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Green & Sustainable Science & Technology
Lijun Guo, Xiaorong Lai, Liangqiong Peng, Jiheng Li, Wenhua Zhang, Bi Shi
Summary: This study synthesized a nitrogen and iron co-doped biochar and found that it exhibited excellent adsorption capacity and cost effectiveness. The study proposes an economically advantageous method for large-scale production, which can be used as an alternative to other co-doped biochars.
JOURNAL OF CLEANER PRODUCTION
(2023)
