Article
Chemistry, Physical
Ruyue Yu, Yanxue Shang, Xue Zhang, Jianting Liu, Fangdou Zhang, Xu Du, Hongman Sun, Jingbin Zeng
Summary: Compared to UV-driven catalysts, the use of sunlight to design efficient visible light catalysts has been less explored. In this study, Fe3O4@ZnO@ZIF-8 three-component core-shell nanoparticles were prepared and their photocatalytic degradation performance was investigated under visible light using Rhodamine B (RhB) as a model contaminant. It was found that Fe3O4@ZnO@ZIF-8 achieved a significant enhancement in the photo-catalytic degradation efficiency with 98% of RhB degraded within 100 min, and a reaction rate constant of 0.0292 min-1. These findings highlight the importance of precise tailoring of core-shell Fe3O4@ZnO@ZIF-8 for achieving desired degradation efficiency of organic pollutants under visible light.
CATALYSIS COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Muhammad Altaf Nazir, Tayyaba Najam, Khurram Shahzad, Muhammad Ahmad Wattoo, Tajamal Hussain, Muhammad Khurram Tufail, Syed Shoaib Ahmad Shah, Aziz Ur Rehman
Summary: In this study, a novel bimetallic zeolitic imidazolate frameworks (ZIFs) have been fabricated for the elimination of toxic dye from water. The synthesized ZIF-8@ZIF-67 showed improved physical and chemical properties compared to single metallic MOFs (ZIF-67 and ZIF-8). Langmuir model was found to sufficiently explain the adsorption process of ZIF-8@ZIF-67, and the mean free energy suggested chemisorption dominates the adsorption. The high applicability and reusability of the bimetallic MOFs were demonstrated through the removal of rhodamine B from water.
SURFACES AND INTERFACES
(2022)
Article
Environmental Sciences
Xu Song, Jingqian Mo, Yuting Fang, Shumin Luo, Jingjing Xu, Xu Wang
Summary: We prepared a double-layer magnetic nanocomposite Fe3O4@ZIF-8@ZIF-67 by layer-by-layer self-assembly, and used it for the removal of tetracycline from water. The Fe3O4@ZIF-8@ZIF-67 demonstrated a high adsorption capacity and removal efficiency for tetracycline due to its outstanding porous structure. Advanced characterization techniques confirmed the adsorption and oxidation mechanisms involved.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Edward W. P. Moore, Fernando Maya
Summary: In this study, the potential of dye-encapsulation as a mechanism to self-report the stability of MOFs for pollutant extraction was evaluated. The dye-encapsulated ZIF-8 showed comparable extraction performance with bare ZIF-8 for hydrophobic endocrine-disrupting phenols and improved extraction performance for hydrophilic endocrine disruptors. The method allows for real-time monitoring of material stability issues during the application process.
Article
Chemistry, Physical
Weisen Yang, Wenlong Jiang, Fengshuo Shi, Yifei Liu, Yuhuang Chen, Gaigai Duan, Chunmei Zhang, Jiapeng Hu, Shaoju Jian
Summary: In order to ensure water safety, it is urgent to eliminate fluoride from aqueous environment. La-modified ZIF-8 hybrids (La-ZIF-8) were synthesized and used for fluoride recovery from wastewater. The La-ZIF-8 showed excellent defluoridation performance, with a maximum fluoride uptake of 224.72-230.95 mg g-1. The adsorption of fluoride on La-ZIF-8 followed the Langmuir isotherm and pseudo-second order model, indicating a single-layer chemical adsorption process. Thermodynamic analysis revealed that the defluoridation process by La-ZIF-8 is endothermic, random, highly feasible and spontaneous. The presence of other ions had minimal impact on fluoride removal, demonstrating the high selectivity of La-ZIF-8 for fluoride.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Trung Tuyen Bui, Duc Cuong Nguyen, Si Hiep Hua, Hyungphil Chun, Yong Shin Kim
Summary: This study presents a novel method for synthesizing magnetic core-shell nanocomposites for environmental applications. The method involves encapsulating magnetic Fe3O4 nanoparticles with microporous zeolitic imidazolate framework-8 (ZIF-8) nanocrystals through ultrasonic activation. The synthesized Fe3O4@ZIF-8 nanoparticles exhibit a core-shell structure and have high content of ZIF-8, combined with micro/mesoporosity. The functional nanomaterial can be used as adsorbents that are easily separated using a magnet, and show excellent adsorption performance for the removal of copper ions from water.
Article
Chemistry, Inorganic & Nuclear
Chengyuan Yang, Rong Wang, Wenxin Zhu, Jing Wang, Liang Zhang, Ting Du, Zhaoli Liu, Linxuan Xie, Jing Sun, Jianlong Wang
Summary: The utilization of ZIF-8 as an interfacial substance in the preparation of heterostructured nanoflowers has been shown to significantly improve photocatalytic reduction efficiency in wastewater treatment, reaching as high as 97.8% in reducing Cr(vi) under visible-light irradiation within 30 minutes.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Multidisciplinary
Yukun Zhong, Xueliang Mu, U. Kei Cheang
Summary: This study synthesized metal-organic framework composites and evaluated their effectiveness in removing organic pollutants. The ZIF-MIL-4 composite showed high adsorption capacity and selectivity, as well as significant regeneration ability. The main interactions between ZIF-MIL-4 and the pollutants were weak coordination, electrostatic, hydrogen bonding, and π-π stacking interactions.
NANOSCALE ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
Mei-Hua Chen, Qian-Ying Lu, Yi-Ming Li, Ming-Ming Chu, Xue-Bo Cao
Summary: In this study, ZnO@ZIF-8 core-shell heterostructures were successfully synthesized, with ZIF-8 shell effectively increasing the specific surface area of ZnO nanorods. The synergistic effect between ZnO and ZIF-8 resulted in high photocatalytic activity, leading to rapid degradation of methylene blue under solar light irradiation. Additionally, the stability experiments demonstrated that the prepared ZnO@ZIF-8 nanocomposites retained over 95% of their photocatalytic activity after four cycles.
Article
Engineering, Chemical
Yun Qu, Lei Qin, Xuguang Liu, Yongzhen Yang
Summary: Metal organic frameworks (MOFs) are promising adsorbents for removing organic pollutants from water. However, their separation and recycling are difficult due to their microcrystalline powder form. This study focuses on the facile fabrication of regenerable magnetic adsorbents with high efficiency and excellent recoverability. A composite of Fe3O4/ZIF-8 was successfully prepared for phenol removal, showing outstanding adsorption capacity and fast adsorption rate. The adsorption mechanism involves hydrogen bonding, pi-pi interaction, pore adsorption, and electrostatic attraction. The magnetic adsorbent also exhibits excellent reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Bhaskar Bethi, Gidla Bhanu Radhika, Le Minh Thang, Shirish Hari Sonawane, Grzegorz Boczkaj
Summary: ZIF-8 supported BiFeO3 photocatalyst prepared by ultrasound cavitation technique showed excellent decolorization performance against Rhodamine-B dye under ultraviolet and visible light. The 40.7 wt% ZIF-8/BiFeO3 composite exhibited the highest photocatalytic activity, and acidic pH had a better effect on the decolorization.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Saber Babaee Zadvarzi, Maryam Khavarpour, Seyed Mohammad Vahdat, Seyed Meysam Baghbanian, Ali Shokuhi Rad
Summary: Effective removal of dyes from industrial wastewater is a global concern, with magnetic chitosan coated with ZIF-8 showing promising results for eliminating cationic dye malachite green. Fe3O4@chitosan@ZIF-8 was found to be a highly efficient adsorbent for removal of toxic malachite green dye from aqueous solution.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Physical
Tingting Chen, Yingjie Xu, Bin Chen, Huiquan Xiao
Summary: This work presents an efficient method for the preparation of zeolitic imidazolate framework-8 (ZIF-8) using zinc ions (Zn2+) and 2-methylimidazole (2-MI) promoted by 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU). The mechanism of ZIF-8 formation and the effect of DBU concentration were investigated. ZnO and Ce/ZnO nanomaterials were prepared using ZIF-8 and cerium-containing ZIF-8 as precursors, and their structure and morphology were characterized. The photocatalytic degradation ability of ZnO and Ce/ZnO for Rhodamine B under visible light and sunlight was also studied.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Nanoscience & Nanotechnology
Xiaohan Meng, Ze Lv, Liyin Shi, Tianzhen Jiang, Shaoyang Sun, Yan Li, Jianguo Feng
Summary: A novel composite Fe3O4@ZIF-8@SiO2 nanoparticle was synthesized to remove pyrethroid insecticides from water. The prepared nanoparticles showed excellent adsorption performance and high dispersibility, and could be easily separated from water using a magnetic field. This study provides a potential design for recoverable and reusable nanoparticles in wastewater treatment.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Environmental
Qiushi Jiang, Zhaolian Han, Yinjie Qian, Yafeng Yuan, Yating Ren, Mingyu Wang, Zhiqiang Cheng
Summary: This study proposes a novel strategy for the preparation of heterojunction derivants by regulating the loading of precursors, which can effectively remove dyes and antibiotics. The results show that ZIF-8-derived ZnO/TiO2 NBT exhibits enhanced specific surface area and visible light response, and can rapidly degrade dyes and antibiotics under visible light irradiation, with excellent cyclic photocatalytic performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)