JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Yongqian Shi,Junqiang Han,Ansheng Yao,Miao Liu,Bibo Wang,Cancan Zhang,Hongfei Zou
Designing multifunctional composites with high flame retardancy and excellent electromagnetic shielding performance is of significant importance. In order to address the poor flame retardant and electromagnetic shielding performances of thermoplastic polyurethane (TPU) composites, in this work, the γ-propyl-trimethoxysilane (KH550) functionalized silicon microencapsulated ammonium polyphosphate (SiAPP-NH 2 ) was synthesized using interface modulation technology. Then, SiAPP-NH 2 was combined with a copper metal–organic framework (MOF-Cu) through microencapsulation and electrostatic self-assembly techniques to prepare microencapsulated flame retardants (SiAPP-NH 2 @MOF-Cu). Subsequently, TPU composites were prepared through melt blending of SiAPP-NH 2 @MOF-Cu with TPU material. The results showed that the interface interaction between SiAPP-NH 2 @MOF-Cu and the TPU matrix was significantly enhanced. Compared to pure TPU, TPU/5SAN@1MC composite exhibited decreases of 78.7%, 51.3%, 59.3%, and 58.7% in peak heat release rate, total heat release, total smoke release, and total carbon dioxide release, respectively. In addition, TPU/1SAN@1MC/rGO composite achieved an average shielding effectiveness of 13.82 dB in the X-band, enabling its broad commercial application. This study offers a promising strategy for the fabrication of TPU composites with good flame retardant and electromagnetic shielding properties.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 38
·期 6
·e7500
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IF 3.7
Yu Zhang,Pei Wang,Gaiying Han,Zhaoyang Wang,Haitao Yu,Zhenzi Li,Xuepeng Wang,Ying Xie,Wei Zhou
Defects engineering is significant for photocatalytic environment remediation. To this end, visible-light-driven α-Fe 2 O 3 /ZrO 2-x S-scheme heterojunction photocatalysts with optimal oxygen vacancy (O v ) defects are successfully synthesized via a two-step method. Compared with pristine UiO-66-NH 2 -derived ZrO 2-x and α-Fe 2 O 3 , the heterojunction photocatalysts exhibit a wider range of visible light response and higher efficiency in separating photogenerated electron–hole pairs. Among them, the 5% α-Fe 2 O 3 /ZrO 2-x sample shows the best photocatalytic performance to the degradation of tetracycline (TC) (89.3%), in which the pseudo-first-order kinetic rate constants are 8.20 and 16.75 times that of pristine ZrO 2-x and α-Fe 2 O 3 , respectively. The outstanding photocatalytic degradation efficiency can be attributed to both the narrow-bandgap ZrO 2-x with visible light response and the formation of α-Fe 2 O 3 /ZrO 2-x S-scheme heterojunctions. During the formation of heterojunctions, the concentration of oxygen vacancies (O v ) at the interface of α-Fe 2 O 3 /ZrO 2-x decreases monotonically with the increasing loading of α-Fe 2 O 3 , thereby altering the electronic structure of the photocatalyst and forming the heterojunction firmly. In addition, the high stability implies the potential applications in fields of environment.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2024
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IF 3.7
Sijia Wang,Ye Liu,Liang He,Yu Sun,Qing Huang,Shoudong Xu,Xiangyun Qiu,Tao Wei
Solid polymer composite electrolytes possess the benefits of superior compatibility with electrodes and good thermal characteristics for more secure energy storage equipment. Herein, a new gel polymer electrolyte (GPE) containing NH 2 -MIL-53(Al), [PP 13 ][TFSI], LiTFSI, and PVDF-HFP was prepared using a simple method of solution casting. The effects of encapsulating different ratios of ionic liquid ([PP 13 ][TFSI]) into the micropores of functionalized metal-organic frameworks (NH 2 -MIL-53(Al)) on the electrochemical properties were compared. XRD, SEM, Nitrogen adsorption-desorption isotherms and electrochemical measurements were conducted. This GPE demonstrates a superior ionic conductivity of 8.08×10 –4 S cm –1 at 60 °C and can sustain a discharge specific capacity of 156.6 mAh g –1 at 0.2 C for over 100 cycles. This work might offer a potential approach to alleviate the solid-solid contact with the solid-state electrolyte and electrodes, and broadens up new window for the creation of all-solid-state batteries.
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SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Gangbing Zhu,Diyan Liao,Nian Hu,Jing Li,Yong He,Yinhui Yi
Herein, we proposed a novel bioenzyme-free dual-mode sensing strategy for the rapid and accurate monitoring of organophosphorus pesticides (OPs) by preparing tris(2,2′-bipyridyl) ruthenium(II) (Ru(bpy) 3 2+ ) encapsulated with UiO-66-NH 2 MOFs as nanozyme (Ru@Zr-MOFs). The as-prepared Ru@Zr-MOFs nanozyme not only exhibits superior peroxidase-like activity which can catalyze O-phenylenediamine (OPD) oxidation to generate yellow 2,3-diaminophenazinc, but also exhibits dual-fluorescence feature (at 442 and 612 nm respectively) and specific interaction capacity with OPs. However, in the existence of OPs, the peroxidase-like activity of Ru@Zr-MOFs nanozyme is restricted and the oxidation process of OPD is stopped; meanwhile, the fluorescence of Ru@Zr-MOFs at 442 nm increases rapidly (< 10 s) while that at 612 nm is apathetic, thus a colorimetric and ratiometric fluorescent sensing strategy was first designed to detect OPs by using glyphosate (Gly) as a typical model of OPs. Then, in consideration of the benefits of smartphone which can make the sensing process more convenient, stable, rapid and sensitive feedback, a smartphone coupled with hydrogel detection platform was proposed also for OPs determination. In addition, the designed sensing strategy offers superior selectivity , stability and real application capabilities. It’s thus expected the as-designed Ru@Zr-MOFs nanozyme based dual-mode sensing strategy possesses important real application for the low-cost, rapid, sensitive and accurate determination of OPs.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Lin Chen,Ruichao Zhu,Han Gao,Jin Wu,Zhiwei Yin,Chuqing Cao
The recycling of lithium-ion batteries (LIBs) presents significant challenges due to the absence of robust acid-resistant membranes capable of selective ion separation under harsh acidic conditions, commonly encountered in hydrometallurgical processes. This study developed a novel PSA-BTSC (polysulfonamide with 1,3,5-benzenetrisulfonyl chloride) composite membrane integrated with UiO-66-NH 2 nanoparticles, aiming to enhance both acid resistance and ion separation performance. Experimental results demonstrated that the PSA-BTSC membrane achieved a Li+/Co 2+ separation factor of 28.02 and retained 85.8 % permeability for Li + while maintaining 91.1 % rejection for Co 2+ after 30 days of immersion in 1 M HCl, showcasing superior acid resistance compared to conventional PA-TMC (polyamide with 1,3,5-benzenetricarbonyl trichloride) membranes, whose Co 2+ rejection dropped drastically to 19.4 %. Surface charge analysis and pore size distribution indicated that PA-TMC membranes suffered partial hydrolysis and pore enlargement, resulting in a reduction of separation efficiency. In contrast, the sulfonyl groups in PSA-BTSC membranes conferred enhanced stability against acid-induced degradation. Additionally, density functional theory (DFT) simulations highlighted the higher activation energy barrier (2.63 eV) for sulfonamide bond hydrolysis compared to amide bonds (1.57 eV), emphasizing the superior stability of the PSA structure. These findings highlighted the superior stability and acid resistance of PSA-BTSC membranes, positioning them as promising materials for applications requiring high stability in acidic environments, such as the processing of lithium battery leachates.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Xiaocan Zhang,Jiashu Long,Mengxin Wang,Yiran Liu,Huixiao Ma
Blending metal-organic frameworks to optimize proton transport pathways is one of the strategies to improve the proton conductivity of proton exchange membranes (PEM). In this paper, amino-sulfonic acid bifunctionalized UiO-66 (NUS) by one-pot solvothermal method is synthesized, and sulfonated poly (ether ether ketone)/NUS-X (SPEEK/NUS-X) hybrid membranes are prepared by mixing NUS into SPEEK matrix. Among them, SPEEK/NUS-1.5 has the highest proton conductivity (177.76 mS cm −1 , 70 °C, 100% RH) and maintain a 300 h conductivity stability. And its maximum power density was 423.2 mW cm −2 , exceeding pristine SPEEK by 2.20 times. Compare to the pristine SPEEK membrane, it is interesting to note the disappearance of SAXS scattering peak of SPEEK/NUS-1.5. It is speculated that this phenomenon was caused by the generation of acid-base pairs between –NH 2 and –SO 3 H, and the improved hydrogen bonding network provides more proton transport channels and immobilizes sulfonic acid groups for improved durability. The resultant proton conductivity is stable over 300 h with about 90% retention.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Siqi Fang,Zhengang Bu,Yuanlin Zhan,Wenzhuo He,Yibin Huang,Jianhua Li
The indiscriminate of tetracycline (TC) has led to significant environmental and health concerns, particularly the proliferation of antibiotic resistance. This study presents a visible-light photocatalytic composite membrane with a Z-scheme heterojunction to improve TC removal efficiency and address the challenge of catalyst powder recovery in practical applications. Firstly, the PI/NH 2 -UiO-66 (PNs) composite photocatalyst was synthesized via a one-step thermal solvent method. Subsequently, the PVDF/MXene/PI/NH 2 -UiO-66 (PMPNs) composite fiber membrane was successfully fabricated by stably loading the PNs and MXene onto PVDF fiber membranes through electrospinning. Under visible light irradiation, the removal efficiency of TC by the PMPN1.5 composite fiber membrane could reach 86.07% through the combined effects of filtration, adsorption, and photocatalysis. Even after three cycles, the recovery rate of the PMPN1.5 membrane could still reach 86.16%. The enhanced photocatalytic performance was due to the Z-scheme heterojunction between PI and NH 2 -UiO-66. This heterojunction structure enhanced the redox capability of the photocatalyst. Additionally, the incorporation of MXene facilitated effectively charged carrier transfer at the heterojunction interface, prolonging the electron-hole separation time and further improving the photocatalytic capability. This study successfully integrates photocatalytic technology with membrane separation to develop a visible light-responsive composite fiber membrane with considerable potential for treating antibiotic-contaminated wastewater. The developed membrane not only mitigates fouling but is also easily recyclable, minimizing the risk of secondary pollution.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Xinnan Ma,Juan Han,Jiacong Wu,Yang Zhou,Chunmei Li,Lei Wang,Yang Lu,Yun Wang
Efficiently enhancing hydrogen peroxide (H 2 O 2 ) production via photocatalysis remains challenging. This study employed genetic engineering to express His-tagged superoxide dismutase (His-SOD), which was selectively anchored onto the coordinatively unsaturated metal sites of etched UIO-66-NH₂ (UIO-66-NH 2 etch ) through coordination-driven assembly. The synergistic effect between His-SOD and UIO-66-NH 2 etch significantly enhanced both the stability and substrate affinity of the enzyme, while simultaneously boosting the photocatalytic activity of the MOF. Compared to its free counterpart, the immobilized His-SOD exhibits a 62 % increase in catalytic efficiency and a more than threefold extension in thermal deactivation half-life. The fabricated UIO-66-NH 2 etch @His-SOD composite achieved an impressive H 2 O 2 production rate of 3890.37 μmol·g −1 ·h −1 , exceeding that of the pristine UIO-66-NH 2 by over 2.5 times within 1 h and maintaining a 1.7-fold enhancement after 4 h. Owing to SOD's inherent superior antioxidative capabilities, the composite material demonstrates exceptional recyclability, retaining 95 % of its initial catalytic activity after four consecutive cycles. This study achieves specific immobilization of functionalized fusion proteins onto photocatalysts, and represents the first introduction of SOD into photocatalytic H 2 O 2 synthesis. This advancement provides valuable insights for the future integration of biocatalysts and synthetic photocatalysts, opening new avenue for research on photo-enzyme coupled catalysis.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2025
·
IF 4.9
Nannan Huang,Shuhao Liang,Xiangyang Liang,Huining Chai,Yingjie Sun,Lili Lyu,Weiqiang Tan
The interfacial compatibility of heterojunction photocatalysts critically governs the interaction modes between constituent materials. Herein, a flower-like Bi-BDC-NH 2 /Ag 2 CO 3 heterostructure was fabricated via a simple ion-exchange solution method, serving as a robust photocatalyst for the efficient photocatalytic reduction of Cr(VI) in simulated wastewater under visible-light irradiation. Ag 2 CO 3 nanosheets were in-situ grown on the surface of three-dimensional Bi-BDC-NH 2 , forming an Ag 2 CO 3 -on-Bi-BDC-NH 2 type II heterojunction that establishes intimate interfacial contact, significantly accelerating the charge and mass transport dynamics. In comparison with pure Bi-BDC-NH 2 and Ag 2 CO 3 , the optimal Bi-BDC-NH 2 /Ag 2 CO 3 -50 (with a weight ratio of 0.5:1) exhibited dramatically enhanced photocatalytic activity, achieving 99% Cr(VI) reduction within 2 hours under visible light (>420 nm, 150 W xenon lamp). Mechanistic investigations, including energy band structure analysis, radical trapping experiments, and photoelectrochemical measurements, revealed that the heterojunction interface significantly promotes the separation and transfer of photogenerated electron-hole pairs. This work provides valuable insights into the rational design of MOF-based heterojunction photocatalysts and their applications in environmental remediation.
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JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2025
·
IF 3.1
Erxu Wang,Huiran Zhang,Xiangchuan Li,Lili Geng,Zhen Wang,Airong Chu,Bin Lu,Li Duan
Alzheimer’s disease (AD) is a common neurodegenerative disease, and is characterized by impaired acetylcholine-mediated neurotransmission. Acetylcholinesterase (AChE) inhibition is a well-established therapeutic strategy for AD. Medicinal plants exhibit multi-target effects, low toxicity, and cost-effectiveness. Therefore, screening AChE inhibitors from botanical sources holds considerable pharmacological potential. In this study, a metal-organic framework was used as a novel support for immobilizing AChE, resulting in the creation of AChE@MIL-88B-NH 2 , which served as a tool for screening potential AChE inhibitors. The immobilized enzyme exhibited excellent reusability, stability against pH fluctuations and thermal stress, and resistance to organic solvents. The constructed AChE@MIL-88B-NH 2 -based ligand fishing strategy coupled with mass spectrometry was applied to screen for AChE inhibitors in Nelumbinis plumula extracts. Seven compounds were identified as potent AChE inhibitors. Enzyme kinetic assays revealed that these ligands exhibit a mixed inhibition mechanism against AChE. Molecular docking demonstrated that the seven compounds effectively bound to the AChE active site, with binding affinities ranging from -9.7 to -8.5 kcal/mol. The established AChE@MIL-88B-NH 2 -based ligand fishing strategy provides a simple and efficient approach for screening potential AChE inhibitors from complex botanical matrices, offering a promising avenue for discovering novel therapeutic agents for AD.
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COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Tianchen Zhang,Yijiao Xue,Fei Song,Zheng Pan,Meng Zhang,Yonghong Zhou
As we all know, in the field of safety protection, it is crucial to develop protective materials with fire-retardant and vibration-damping properties. However, it is a challenging task to integrate different properties into a single polymer. To meet this challenge, we successfully developed a functionalized nano flame retardant (UiO-66-NH 2 @DOPO) by modifying UiO-66-NH 2 with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). This flame retardant was then incorporated into a porous polyurethane foam (MPUF) synthesized from a bio-based polyol, resulting in a bio-based MPUF composite with excellent vibration-damping, fire-retardant, smoke-suppressing, and anti-dripping properties. Due to the intumescent fire-retardant system formed by UiO-66-NH 2 and DOPO, when the additional amount of UiO-66-NH 2 @DOPO reached 25 %, the LOI value of the MPUF composite material was increased to 31.2 %, and the total smoke production (TSP) was reduced by 80.64 %. In addition, it obtained a V-0 rating in the UL94 test and exhibited excellent anti-dripping properties. In addition, owing to the reinforcement effect and stress dissipation of UiO-66-NH 2 @DOPO, the MPUF composites exhibited excellent energy dissipation and vibration-damping properties (maximum loss factor of 1.32 at 1.0 Hz). This new bio-based MPUF composite material has broad application prospects. It can become an innovative self-supporting vibration-damping and protective material in sports, transportation, and aerospace.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jingyu Cai,Junjie Shi,Jian Zhang,Xiaoyu Miao,Sen Wang,Longqiang Xiao,Dan Liu,Linxi Hou
Electronic-grade isopropyl alcohol is widely utilized in the cleaning of semiconductors and microelectronic components. Removing ions like Pb2+ is crucial since the presence of impurities may cause degradation of electronics, increased failure rates, and short circuits. Membrane materials offer a number of advantages in the field of adsorption separation; however, the lack of adsorption sites results in limited adsorption capacity. In the current work, guanidino-grafted NH2-MIL-101(Fe) was incorporated into polyvinylidene fluoride (PVDF) to prepare MOF/PVDF mixed matrix membranes (NM/PVDF) for the removal of Pb2+ from isopropanol. Benefiting from the larger specific surface area and more lone electron pairs in the guanidine group, the Pb2+ adsorption capacity of the as-prepared NM/PVDF membrane was 29.4458 mg/g, which was higher than that of the NH2-MIL-101(Fe)/PVDF membrane (20.9306 mg/g) and the pure PVDF membrane (6.7324 mg/g). The NM/PVDF membrane was able to reduce the concentration of Pb2+ from 500 to 86.73 ppb. This work highlights the potential of guanidine-grafted Fe-based MOFs/PVDF membranes as adsorbents for acquisition of electronic-grade solvents.
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