JOURNAL OF NANOPARTICLE RESEARCH
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2025
·Vol. 27
·期 10
·1-14
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IF 2.6
Shi Yuanteng,Li Nan,Chen Jingjie,Liu Lei,Xu Xingjie,Chai Jin,Li Peng
In view of the urgent need for efficient and low-cost treatment of organic pollutants in printing and dyeing wastewater, magnetic porous adsorbents have attracted significant attention owing to their high efficiency and reusability. Herein, magnetic bimetallic zeolitic imidazolate framework (mZIFs) nanoparticles with Fe 3 O 4 cores were synthesized as the initial precursor. Subsequently, the novel hollow mZIFs core–shell nanocomposites (defined as mNCs) were prepared through a mild tannic acid etching method, designed for efficient removal of organic pollutants from wastewater. The mNCs displayed remarkable adsorption potential, reaching up to 879.49 mg/g for methylene blue (MB) and 262.50 mg/g for tetracycline hydrochloride (TC) at 303 K, with adsorption following the pseudo-second-order kinetic model and fitting well to the Langmuir isotherm. Thermodynamic analysis revealed that the adsorption of MB and TC by mNCs proceeds spontaneously through an endothermic process, and the mNCs retained over 80% of their MB removal efficiency even after five adsorption–desorption cycles. These results highlight the potential of mNCs as an efficient and reusable adsorbent for eliminating organic contaminants in wastewater treatment. Graphical
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CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Qi Zhang,Liangyun Yu,Bairen Yang,Chenchen Xu,Wang Zhang,Qi Xu,Guowang Diao
Herein, Fe 3 O 4 @Ru-doped TiO 2 photocatalyst was developed successfully by a facile chemical strategy. The sample with 0.2% doping Ru showed the best photocatalytic activity, which could photodegrade 70.20% of methylene blue after 120 min of simulated sunlight exposure, and kept good degradation efficiency and recovery after 5 cycles. It could be attributed that the Ru-doping alleviated the band gap energy to make the electron-hole pairs easier to generate and enhanced the synergistic effect to increase the carrier separation efficiency. The present work provided a development prospect of simple preparation of recoverable photodegradation catalyst for environmental organic pollutants.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hu Chen,Minglei Teng,Qihui Hu,Xiaoliu Liang,Hui Liu,Zhenjie Li,Xing Gao,Yisheng Peng,Xiaoyong Wang,Syed Faheem Askari Rizvi,Yi Lv,Hongwei Cheng,Rui Tao,Gang Liu
Anatomical hepatectomy is a widely employed surgical technique due to its capacity to excise hepatic lesions and minimize risk variables associated with postoperative recurrence. However, preserving the anatomical and functional integrity of the liver remains a critical concern and a significant challenge in determining the boundaries of targeted liver segments. This study utilized a super-stable pure-nanomedicine formulation technology (SPFT) to synthesize methylene blue nanosheets (nanoMB) without external carrier, nanoMB did not alter the chemical composition of methylene blue (MB), it was purely a physical aggregation of molecules. The nanosize and morphology of nanoMB enhanced the internalization and retention in hepatocytes and liver tissues, addressing the limitations of unclear staining due to the rapid diffusion of MB during liver segment resection. The in vivo model of blue staining of liver segments in rats and rabbits confirmed that nanoMB can extend the staining duration of liver segments by over 3 h, whereas free MB continues for <1 min, thereby addressing the time constraints associated with liver resection. In subsequent human clinical trials, a single low-dose nanoMB injection was employed to mark hepatic segment boundaries during anatomical hepatectomy for hepatocellular carcinoma and hepatolithiasis. The boundaries continued to be distinct for over 30 min, effectively guiding the surgical resection. The postoperative liver function recovered to normal, with no complications or disease recurrence reported. In conclusion, carrier-free nanomedicine enhances hepatic visualization by improving cellular uptake and hepatic segment retention. This advancement facilitates precise surgery and establishes a new paradigm for translational research from bench to clinic.
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DESALINATION
·
2026
·
IF 9.9
Ming Li,Xiaofei Fan,Jianing Hu,Jinghong Zhang,Huining Xiao,Yuling Zhang
A 3D porous MXene/cellulose aerogel is fabricated by sol-gel and freeze-drying technique. • It achieves a high Hg(II) uptake of 877.19 mg/g at 318 K via chemisorption and redox. • The aerogel also removes methylene blue efficiently by electrostatic attraction. • It shows good reusability, easy separation, and structural stability. Aqueous contamination by heavy metal ions and organic dyes represents two major categories of water pollutants. Developing adsorbents that can efficiently remove both types is highly desirable. Here, multilayered MXene (Ti 3 C 2 T x ) was prepared by selective etching of Ti 3 AlC 2 using LiF/HCl and combined with cellulose to construct a three-dimensional porous MX@Cell composite aerogel via sol-gel and freeze-drying. The materials were characterized by SEM, XRD, FTIR, nitrogen adsorption-desorption, and XPS. Batch adsorption tests for Hg(II) and MB were conducted separately. MX@Cell-25 (25 wt% MXene) achieved a maximum theoretical Hg(II) capacity of 877.19 mg/g at 318 K, outperforming numerous previously reported adsorbents. It followed pseudo-second-order kinetics and the Freundlich isotherm, indicating chemisorption-dominated multilayer adsorption on a heterogeneous surface. Thermodynamic analysis indicated that the adsorption of Hg(II) on MX@Cell-25 was a spontaneous process accompanied by an entropy increase and an endothermic reaction ( ΔH > 0), confirming that higher temperatures favored the adsorption process. XPS revealed a synergistic mechanism of electrostatic attraction, surface coordination, and redox reactions. For MB, the maximum capacity was 104.93 mg/g at 318 K, with pseudo-second-order kinetics and Langmuir isotherm fitting, suggesting monolayer adsorption driven by electrostatic attraction. The composite showed good reusability (about 85% Hg(II) capacity retention after seven cycles), as well as easy separability and environmental friendliness. This work demonstrates that MXene/cellulose composite aerogel is a promising candidate for removing both heavy metal ions and organic dyes from water. Download: Download high-res image (274KB) Download: Download full-size image
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ChemistrySelect
·
2026
·Vol. 11
·期 13
·e06769
·
IF 2.3
Juying Zhou,Yelong Huang,Haitang Xu,Han Long,Jing Xiang
To tackle low adsorption capacity and eco-unfriendly preparation of methylene blue adsorbents, this study fabricated three polyacrylonitrile (PAN)-based composite fiber membranes via a novel ultraviolet curing-electrospinning method, namely Type I (PAN/acrylic acid (AA)-hydroxypropyl acrylate (HPA)), Type II (PAN/AA-ethylene glycol (EG)), and Type III (PAN/(AA-polyacrylamide)-EG). After 5 cycles at an initial methylene blue concentration of 520 mg/L, the membranes retain over 80% of initial adsorption capacity, demonstrating excellent reusability. Material properties were characterized, and key adsorption-affecting parameters were studied. Results indicated the Type III membrane with 8% PAN + 9% prepolymer had the best comprehensive performance, achieving a maximum methylene blue adsorption capacity of 1420.84 mg/g, much higher than Type I (958.13 mg/g) and Type II (1159.35 mg/g). Type III membrane has continuous, uniform fibers without beaded defects and excellent thermal stability. The adsorption process is highly consistent with the pseudo-second-order kinetic model and Langmuir model, belonging to chemisorption. The mechanism is dominated by electrostatic attraction between carboxyl groups and methylene blue cation, supplemented by hydrogen bonding of amide groups, combined with a flexible cross-linked network structure. This verifies the “multi-functional group synergy-microstructure optimization” design strategy for high-performance adsorbents, providing a new scheme for the green preparation of efficient MB adsorbents.
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MATERIALS CHEMISTRY AND PHYSICS
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2026
·
IF 5.2
Rui Li,Rangam Rajkhowa,Limna Suja Shaji,Ji Zhou,Bin Tang,Yong Ye,Christopher Hurren
In this study, an effective biomass-based surface-enhanced Raman scattering (SERS) substrate was developed by combining microfibrillated silk (MFS) derived from Bombyx mori silk fibers with silver nanoparticles (AgNPs). The substrate was prepared through an environmentally friendly in situ reduction strategy based on the intrinsic reducing ability of MFS. The resulting AgNPs@MFS composites, prepared using different silver nitrate concentrations, were characterized, and their SERS performances were evaluated using model Raman probe molecules. The surface charge of AgNPs@MFS could be tuned by adjusting the solution pH, which promoted efficient enrichment of target molecules on the substrate, with an adsorption efficiency of 48.1% for methylene blue. The substrate exhibited excellent SERS performance, with a lowest detectable concentration of 1 × 10 −9 M for methylene blue. In addition, it showed preferential adsorption toward cationic dye molecules. The substrate also demonstrated reliable SERS detection in realistic water samples (tap water and lake water) with satisfactory recovery, highlighting its applicability in complex aqueous matrices. These results indicate that MFS provides a simple and scalable SERS platform through its hierarchical structure, adsorption capability, and in situ nanoparticle growth, enabling robust detection of target molecules in real-world aqueous environments.
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INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2025
·
IF 2.5
Qiang Wang,Xinyi Chang,Yifan Wang,Qian Yu,Lingzi Xu,Xianming Kong
Dye wastewater pollutes aquatic ecosystems, has toxic effects on aquatic organisms and can enter the human body through the food chain, causing potential health hazards. Magnetic ferrite-based adsorbents have attracted a lot of attention because they combine the advantages of magnetic materials and adsorbent materials. In this study, the activated carbon (AC) was crosslinked with Fe3O4 nanoparticles and β-cyclodextrin polymer (β-CDP) by a simple method to obtain MAC/β-CDP biosorbent, which can effectively remove methylene blue (MB). The specific surface area of MAC/β-CDP was 434 m2 g−1 by nitrogen adsorption desorption method. The MAC/β-CDP composite shown good adsorption capacity. The optimal adsorption conditions were determined as follows: initial pH = 8, MAC/β-CDP dosage (0.2 g/50 mL), contact time (180 min) and the removal rate of cationic dye reached more than 97.14%. In addition, the maximum adsorption capacity of MAC/β-CDP composite for MB (50 mL) was 1.21 mg g−1, and the adsorption isotherm curve followed Langmuir (R2 = 0.9621) and Freundlich (R2 = 0.9982) models. In addition, after three cycles of regeneration, the regeneration rate of MAC/β-CDP was 96.76%. These results demonstrate the potential of MAC/β-CDP in the practical removal of MB pollutants in wastewater.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Zhe Zhang,Lei Xu,Yani Liu,Runtian Feng,Tong Zou,Yuanshuo Zhang,Yuru Kang,Pengxin Zhou
In order to improve the efficiency of the removal of methylene blue from wastewater, we synthesized activated carbon by thermally activating phosphoric acid-treated mangosteen peels. This activated carbon possessed a great specific surface area (1832 m 2 /g) and exhibited excellent adsorption capacity (871.49 mg/g) for methylene blue. In this study, we varied the impregnation ratios, activation temperatures, and activation time to determine the best conditions for preparing the mangosteen peel activated carbon (MPAC). The optimal conditions included a 1:3 impregnation ratio with activation for 60 min at 450 °C. We characterized the MPAC using a scanning electron microscope, powder X-ray diffraction, thermogravimetric analysis , differential scanning calorimetry , and Fourier transform infrared spectroscopy together with the Brunauer–Emmett–Teller approach. The adsorption experiment results conformed to the pseudo-second-order kinetic model and the Langmuir isotherm model. This proved that physical adsorption dominates in this adsorption process . The synthesized MPAC-5 showed great adsorption performance for a variety of dye wastewater. After three times of recycling, the removal rate of methylene blue is still above 40%. Compared with other biowastes, mangosteen peel has the potential to be synthesized into activated carbon with a high adsorption capacity for dyes.
研究领域:
环境科学
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材料科学
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化学工程
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污染控制
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吸附技术
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废物资源化
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Russian Journal of Physical Chemistry A
·
2026
·Vol. 99
·期 13
·3279-3287
·
IF 0.8
Hao Lv,Zheng Dan,Liu Xiyue,Li Luyun,Tan Jingjing,Xing Bo
This paper focuses on the preparation, structural characterization, and property investigation of the copper(I) complex [Cu(dppe)(phon)]I based on 1,2-bis(diphenylphosphino)ethane. The target complex was synthesized via a solution method, using 1,2-bis(diphenylphosphino)ethane, cuprous iodide, and 1,10-phenanthroline-5,6-dione as raw materials and acetonitrile as the solvent. It was then characterized by infrared spectroscopy (IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet-visible spectroscopy (UV–Vis), and fluorescence spectroscopy. Methylene blue was used to simulate dyeing wastewater, and the single-factor method was employed to study the effects of the initial concentration of methylene blue, illumination time, complex dosage, and temperature on the- efficiency. The results indicated that the optimal photocatalytic degradation performance was achieved at a relatively low initial concentration of methylene blue, an appropriate complex dosage (25 mg), and a temperature of 40°C. Additionally, the copper(I) complex was utilized as a phosphorescent probe for the detection of tetracycline hydrochloride, doxycycline hydrochloride, and chlortetracycline hydrochloride. It was found that the addition of tetracycline antibiotics led to a decrease in the fluorescence intensity of the complex, and the higher the concentration of the antibiotics, the stronger the quenching effect. The detection limit of the phosphorescent probe for tetracycline hydrochloride antibiotics was 3.0 × 10 –9 mol/L. This study provides a theoretical basis and practical reference for the application of copper(I) complexes in photocatalytic degradation and tetracycline detection.
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ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Minghuan Wang,Hekai Zhang,Yunfei Song,Yilei Zhu,Yaning Zong,Peng Wei,Zheng Guo,Li Yin,Jianwei Fu
s The practical application of metal-organic framework (MOF)-derived catalysts in advanced oxidation processes (AOPs) is often hindered by challenges in recoverability and stability in complex water matrices. To overcome these limitations, we developed a scalable strategy to fabricate N-doped carbon nanofibers with coexisting atomic Co sites and metallic Co nanoparticles (Co-N/C) by electrospinning a ZIF-67/polyacrylonitrile (PAN) composite followed by controlled pyrolysis. This integrated design yields a catalyst with a hierarchical porous structure and a high specific surface area (317.55 m 2 g -1 ), which synergistically enhances mass transfer and exposes abundant active sites. The optimized Co-N/C catalyst demonstrates ultrafast catalytic activity, achieving over 98% degradation of methylene blue (MB) within 5 minutes via efficient peroxymonosulfate (PMS) activation. Mechanistic studies, supported by quenching experiments and density functional theory (DFT) calculations, reveal that the degradation proceeds via a nonradical-dominated pathway, with singlet oxygen ( 1 O 2 ) generated through interfacial electron transfer playing the primary role, while sulfate (SO 4 • - ) and hydroxyl (•OH) radicals from Co 2+ /Co 3+ redox cycling serve a secondary function. The catalyst exhibits excellent operational robustness, maintaining high efficiency (>92%) across a broad pH range (3-9) and showing remarkable reusability with minimal activity loss over five consecutive cycles. Furthermore, ecological structure-activity relationship (ECOSAR) modeling indicates a significant reduction in the environmental toxicity of the degradation intermediates. This work provides not only an effective and eco-friendly candidate for dye wastewater remediation but also fundamental insights into the rational design of MOF-derived functional materials for superior, nonradical-predominant AOPs.
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MOLECULES
·
2023
·Vol. 28
·期 8
·3410
·
IF 4.6
Yuyu He,Liangmeng Ni,Qi Gao,Hao Ren,Mengfu Su,Yanmei Hou,Zhijia Liu
To effectively remove methylene blue (MB) from dye wastewater, a novel activated carbon (BAC) was manufactured through co-pyrolysis of bamboo shoot shell and K2FeO4. The activation process was optimized to a temperature of 750 °C and an activation time of 90 min based on its excellent adsorption capacity of 560.94 mg/g with a yield of 10.03%. The physicochemical and adsorption properties of BACs were investigated. The BAC had an ultrahigh specific surface area of 2327.7 cm2/g and abundant active functional groups. The adsorption mechanisms included chemisorption and physisorption. The Freundlich model could be used to describe the isothermal adsorption of MB. The kinetics confirmed that the adsorption of MB belonged to the pseudo-second-order model. Intra-particle diffusion was the main rate-limiting step. The thermodynamic study showed that the adsorption process was endothermic and temperature was beneficial for the improvement of adsorption property. Furthermore, the removal rate of MB was 63.5% after three cycles. The BAC will have great potential for commercial development for purifying dye wastewater.Keywords:bamboo shoot shell;activated carbon;adsorption process;methylene blue;K2FeO4
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Zhenyu Jing,Yanhui Li,Yang Zhang,Mingzhen Wang,Yaohui Sun,Kewei Chen,Bing Chen,Shiyong Zhao,Yonghui Jin,Qiuju Du,Xinxin Pi,Yuqi Wang
Zirconium alginate/graphene oxide (ZA/GO) hydrogel spheres were prepared by crosslinking sodium alginate and GO with Zr 4+ . Then Zr 4+ on the surface of the ZA/GO substrate acted as the metal nucleation site of the UiO-67 crystal and interacted with the organic ligand biphenyl 4-4′-dicarboxylic acid (BPDC) to make UiO-67 grow in situ on the surface of the ZA/GO hydrogel sphere by the hydrothermal method . The BET surface areas of ZA/GO, ZA/UiO-67, and ZA/GO/UiO-67 aerogel spheres were 1.29, 47.71, and 89.33 m 2 /g respectively. The maximum adsorption capacities of ZA/GO, ZA/UiO-67, and ZA/GO/UiO-67 aerogel spheres for methylene blue (MB) at room temperature (298 K) were 145.08, 307.49, and 1105.23 mg/g respectively. The kinetic analysis showed that the adsorption process of MB on the ZA/GO/UiO-67 aerogel sphere was consistent with the pseudo-first-order kinetic model. Isotherm analysis showed that MB was adsorbed on ZA/GO/UiO-67 aerogel spheres as a single layer. Thermodynamic analysis showed that the adsorption process of MB on the ZA/GO/UiO-67 aerogel sphere was exothermic and spontaneous. Adsorption of MB on ZA/GO/UiO-67 aerogel spheres is mainly dependent on π-π bond, electrostatic interaction, and hydrogen bond . After 8 cycles, ZA/GO/UiO-67 aerogel spheres still showed high adsorption performance and good reuse ability.
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