REACTIVE & FUNCTIONAL POLYMERS
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2014
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IF 2.822
Fu Liu,Bi-rong Ma,Dong Zhou,Li-Jing Zhu,Yin-Yi Fu,Li-xin Xue
A novel positively charged loose nanofiltration (NF) membrane was fabricated feasibly by UV-induced photografting polymerization of diallyl dimethyl ammonium chloride (DADMAC) on Polysulfone ultrafiltration membrane. A possible reaction mechanism was proposed that a linear chain structure and/or pyrrole like five-membered nitrogen heterocycles structure on the side chain were grafted to form the active barrier layer. NF membrane demonstrated a looser average pore size of 8.6 nm and positive charges surface. Owing to the nanoscale ultrathin nanoscale barrier layer and the combination of Donnan exclusion and steric hindrance , NF membrane exhibited good hydrophilicity , a high pure flux of 60 L/m 2 h (0.5 MPa), a good salt rejection to Mg 2+ (90.8%), Al 3+ (94.0%), Ca 2+ (91.5%), and a high dye rejection to methylene blue (99.4%) and congo red (100.0%) respectively. The salts rejection of NF membrane to different salts followed the order of AlCl 3 > CaCl 2 > MgCl 2 > NaCl > LiCl > MgSO 4 > Na 2 SO 4. NF membrane showed certain fouling resistance to seawater and BSA solution. The grafting polymerization kinetics were comprehensively investigated including irradiation time, monomer concentration and irradiation intensity. X-ray Photoelectron Spectroscopy (XPS), scanning electron microscopy (SEM), atomic force microscopy (AFM) and contact angle measurement were employed to investigate membrane chemistry, morphologies, and hydrophilicity.
研究领域:
材料科学
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环境工程
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膜分离技术
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高分子化学
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水处理
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2019
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IF 7.015
Ziqiang Tong,Xiufeng Liu,Baoquan Zhang
A series of sphere-like polyelectrolyte complexes (PECs) and their homogeneous polyelectrolyte complex membranes (HPECMs) were synthesized by using sodium carboxymethyl cellulose (CMCNa) and poly(diallyldimethylammonium chloride) (PDDA). Different compositions or ionic complexation degrees (ICD) of PECs could be characterized by FT-IR spectra. The circular dichroism spectrum (CD) and field emission scanning electron microscopy (FESEM) were employed to examine the conformation and morphology of PECs, respectively. Zeta (ζ) potential was utilized to investigate the charge density of PEC particles while the surface hydrophilicity of HPECMs was studied by using contact angle (CA) meter. When subjected to ethanol dehydration, HPECMs revealed a satisfactory pervaporation performance and desired anti-trade-off phenomenon. For HPECM 0.31 and HPECM 0.57, the permeation fluxes were 2.25 kg m −2 h −1 and 2.93 kg m −2 h −1 , and the water content in permeate reached up to 99.35 wt% and 99.38 wt%, with respect to 10 wt% water in feed under 70 °C. All the results indicated that small-sized and sphere-like PECs were truly in favor of enhancing the pervaporation performance in ethanol dehydration.
研究领域:
高分子科学
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膜分离技术
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化学工程
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材料科学
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物理化学
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DOI
高影响因子
Journal of Environmental Sciences
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2018
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IF 3.12
Fan Bu,Baoyu Gao,Qinyan Yue,Xue Shen,Wenyu Wang
Coagulation–ultrafiltration (C–UF) is widely used for surface water treatment. With the removal of pollutants, the characteristics of organic matter change and affect the final treatment efficiency and the development of membrane fouling . In this study, we built a dynamic C–UF set-up to carry out the treatment of micro-polluted surface water, to investigate the characteristics of dissolved organic matter from different units. The influences of poly aluminum chloride and poly dimethyldiallylammonium chloride (PDMDAAC) on removal efficiency and membrane fouling were also investigated. Results showed that the dosage of PDMDAAC evidently increased the UV 254 and dissolved organic carbon removal efficiencies, and thereby alleviated membrane fouling in the C–UF process. Most hydrophobic bases (HoB) and hydrophobic neutral fractions could be removed by coagulation. Similarly, UF was good at removing HoB compared to hydrophilic substances (HiS) and hydrophobic acid (HoA) fractions. HiS and HoA fractions with low molecule weight accumulated on the surface of the membrane, causing the increase of transmembrane pressure (TMP). Membrane fouling was mainly caused by a removable cake layer, and mechanical cleaning was an efficient way to decrease the TMP.
研究领域:
环境工程
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水处理技术
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膜分离
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有机地球化学
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给水处理
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DOI
高影响因子
IONICS
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2016
·Vol. 22
·期 11
·2225-2233
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IF 2.119
Lu Juanjuan,Liu Yuelin,Liu Xinhe,Lu Xiaoquan,Liu Xiuhui
In this article, we constructed an electrochemical sensor for highly sensitive determination of β-nicotinamide adenine dinucleotide (NADH) using the poly(diallyldimethylammonium chloride)-functionalized reduced graphene oxide nanocomposite modified electrode (PDDA-rGO/GCE). The nanocomposite was characterized by transmission electron microscopy, Fourier transform-infrared spectrometry, ultraviolet-visible absorption spectrometry, cyclic voltammetry, and electrochemical impedance spectroscopy. The experimental results demonstrated that the fabricated sensor exhibited excellent electrocatalytic activity on the oxidation of NADH with a decreased about 200 mV in overpotential and 5.0-fold increment in the oxidation peak current compared to a bare GCE. Applying cyclic voltammetry, a wide linear range from 1.0 × 10 −7 to 2.9 × 10 −3 M with low limit of detection (LOD) of 3.4 × 10 −8 M and high sensitivity of 463.3 μA mM −1 cm −2 were obtained, which was superior to other NADH electrochemical sensors reported previously. Furthermore, the fabricated NADH sensor possessed excellent selectivity, reproducibility, and stability. The oxidation mechanism of NADH at the PDDA-rGO/GCE was also discussed in detail.
A simple NADH sensing platform based on PDDA-rGO composite is constructed, which exhibits an ultra-low detection limit ( 3.4×10-8 M) towards the oxidation of NADH, and the electrochemical reaction mechanism of NADH is discussed in detail.
研究领域:
生物电化学
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生物传感器
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纳米生物技术
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分子诊断
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转化医学
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电分析化学
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DOI
高影响因子
Journal of Materiomics
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2024
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IF 8.4
Xin Zhou,Chenbin Ai,Xiaojing Wang,Zhen Wu,Jianjun Zhang
Pure ZnO exhibits low photocatalytic H 2 O 2 production activity due to the rapid charge recombination. To realize the spatial separation of photogenerated electrons and holes, constructing an electron transfer channel on the ZnO surface is an effective approach. This study successfully modified the surface of ZnO using F – (ZnO/F) by introducing NH 4 F in an aqueous phase photocatalytic system. The F – is adsorbed on the ZnO surface by Coulombic force and significantly improves the photocatalytic H 2 O 2 production performance of ZnO, with the highest efficiency of 4137.2 μmol·g –1 ·L –1 ·h –-1 . The photocatalytic performance enhancement mechanism of ZnO/F is explained in terms of electron transfer dynamics by femtosecond transient absorption spectroscopy (fs-TAS) measurements. F – surface modification constructs a new ultrafast electron transport pathway from the ZnO CB to F – , and the optimal ZnO/F exhibits the fastest interfacial electron transfer lifetime of 5.8 ps. The F – surface modification effectively facilitates the charge separation, thereby increasing the number of electrons available for photocatalytic H 2 O 2 reaction. This study has revealed the roles of F – surface modification in the photocatalytic H 2 O 2 production by ZnO and provides guidance for ionic modification to improve photocatalytic performance.
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高影响因子
Journal of Energy Storage
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2025
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IF 9.8
Liwei Yang,Xinshuai Yan,Jianguo Duan,Xiaoxiao Huang,Qing Ma
As an intermittent energy source, the efficient utilization of solar energy relies on stable and efficient energy conversion and storage technologies. Phase change materials (PCM) have become ideal candidate materials for solar thermal storage due to their high energy storage density and reversible cycling characteristics. However, traditional organic solid-liquid phase transition materials are prone to leakage during the phase transition process and have a relatively low photothermal conversion efficiency, which limits their practical application. To address the above issues, this study designed a novel composite phase change material (CPCM). By collaboratively loading nanomaterials of different dimensions, such as copper nanowires (CuNWs) and MXene, into a graphene porous framework and encapsulating paraffin (PW), the reduced graphene oxide (rGO)/ CuNWs/MXene/PW (rGCuMPW) composite material was successfully constructed. Among them, the high light absorption capacity of MXene, combined with the excellent thermal conductivity of CuNWs, significantly improved the photothermal conversion efficiency (92.11 %) and thermal energy storage density (ΔH = 165.77 J·g −1 ) of the material. In addition, this material still maintains a stable phase transition enthalpy value after 100 cycles, demonstrating excellent cycle stability and reusability. The CuNWs-MXene synergistic modification strategy proposed in this study not only effectively reduces the leakage rate of organic PCM, but also significantly improves the performance of photothermal conversion and thermal energy storage, providing a new type of high-performance CPCM for the efficient utilization of solar energy.
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高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2024
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IF 3.6
Shanjiang Chen,Jianjian Yang,Fuli Liu
Celastrol (CEL) belongs to the group of non-steroidal immunosuppressants with the potential to improve cardiac hypertrophy (CH). However, the poor biocompatibility and low bioavailability of CEL limit its in vivo application. This study was aimed to develop a targeted drug delivery system that can efficiently and safely deliver CEL to target tissues, providing a research basis for the application of CEL in CH therapy. A novel ROS-sensitive drug-loaded nanomicelle, dodecanoic acid (DA)-phenylboronic acid pinacol ester-dextran polymer encapsulating CEL (DBD@CEL), was synthesized using chemical synthesis. Then, the morphology, particle size, drug-loaded content, and ROS-responsive release behavior of DBD@CEL were studied. Pharmacokinetics and biocompatibility were evaluated using healthy mice. Finally, the ability and mechanism of DBD@CEL in improving CH in vivo were investigated using a mouse CH model. DBD@CEL was successfully prepared with a drug loading of 18.9%. It exhibited excellent stability with an average particle size of 110.0 ± 1.7 nm. Within 48 h, DBD@CEL released only 19.4% in the absence of H2O2, while in the presence of 1 mM H2O2, the release rate increased to 71.5%. Biocompatibility studies indicated that DBD@CEL did not cause blood cell hemolysis, had no impact on normal organs, and did not result in abnormal blood biochemical indicators, demonstrating excellent biocompatibility. In vivo studies revealed that DBD@CEL regulated the activation of NF-κB signaling, inhibits pyroptosis and oxidative stress, and thereby ameliorates CH. The ROS-responsive DBD@CEL nanodrug delivery system enhances the therapeutic activity of CEL for CH, providing a promising drug delivery system for the clinical treatment of CH.
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DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2026
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IF 6.7
Hong Tian,Ziwen Zhao,Zhangjun Huang,Yanshan Yin,Song Ren,Shan Cheng
The presence of nitrogen-containing compounds (NCCs) in bio-oil severely limits its downstream utilization as a clean fuel. To address this issue, a catalytic strategy combining hierarchical pore construction and bimetallic active-site modification was developed for the deep denitrogenation and upgrading of biomass pyrolysis oil. Bamboo (BB) and wheat straw (WS) were selected as representative forestry and agricultural residues, respectively, and Ni-Co bimetal-modified HZSM-5 catalysts were prepared. Appropriate alkali treatment significantly improved the pore structure of HZSM-5, increasing its specific surface area from 383.9 to 409.12 m 2 /g, while Ni and Co introduction effectively regulated the distribution of acidic sites. As a result, the modified catalysts enhanced the pyrolysis of BB and WS and improved the quality of the resulting bio-oils. Over 6Ni0.5Co-HR5, aromatic selectivity reached 51.06% for BB and 50.66% for WS. GC/MS analysis showed that the catalyst promoted the transformation of nitrogen species from kinetically unstable chain-like compounds into more stable cyclic structures, facilitating their further removal. Among the catalysts, 6Ni0.5Co-HR5 exhibited the best denitrogenation performance, reducing the relative total nitrogen content in BB- and WS-derived bio-oils to 0.89% and 0.67%, respectively, corresponding to decreases of 96.34% and 93.02% compared with non-catalytic pyrolysis. This superior perf ormance was attributed to the synergistic effect of the hierarchical pore structure and Ni-Co bimetallic sites. The results demonstrate good feedstock adaptability of the catalyst and provide an effective route for producing low-nitrogen, aromatic-rich bio-oil.
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高影响因子
Advanced Materials Interfaces
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2026
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IF 4.5
Chunmin Jia,Yimin Lei,Hong Xu,Xin Meng,Yuxiang Wei,Peixian Li,Xiaohua Ma,Yue Hao,Xiaohui Jia
Programmed death-1 (PD-1) is a key biomarker for monitoring therapeutic response and resistance in non-small cell lung cancer (NSCLC) immunotherapy. Achieving highly sensitive, real-time detection of PD-1 is crucial for early prediction of treatment resistance and disease recurrence. However, current methods such as ELISA suffer from limitations in sensitivity, speed, and cost. To address these challenges, we develop a label-free biosensor based on semiconducting single-walled carbon nanotube field-effect transistors (CNT-FETs). The sensing interface is designed by wrapping s-SWCNTs with poly[9-(1-octylnonyl)-9H-carbazole] (PCz), enabling immobilization of anti-PD-1 antibodies via cation-π interactions. XPS analysis confirms antibody immobilization via reversible binding energy shifts in C 1s and N 1s spectra upon salt treatment, consistent with cation-π interactions, further validated by NaCl and imidazole competition assays. Using this strategy, the sensor achieves a detection limit of 8.39 fg/mL for murine PD-1—three orders of magnitude lower than ELISA, along with good specificity and favorable regeneration capability. In human serum, it shows promising performance, with 12 out of 14 NSCLC patient samples (85.7%) exhibiting good linear correlation. With rapid response, low cost, and simple operation, this platform offers a reliable strategy for point-of-care PD-1 monitoring during NSCLC immunotherapy.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2026
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IF 6.4
Guodian Zhu,Ying Liu,Zhanhui Chen,Qingbing Guo,Jiangzhen Qiu,Buning Zhang,Jinhui Huang,Guoqiang Yin
Replacing α -hydroxyl group with an α , β -unsaturated group markedly enhanced the decomposition reactivity of dimer. • α , β -Unsaturated group promoted C α ─C β bond cleavage, while α -hydroxyl group led to β -O-4 bond cleavage. • α , β -Unsaturated group accelerated reaction rate ∼14-fold at 120 °C. • Dehydration of α -hydroxyl group into α , β -unsaturated group facilitated lignin depolymerization. Lignin is a promising feedstock for the production of monomeric aromatics, which can be further upgraded into valuable chemicals or fuel hydrocarbons. In this work, the effect of the α , β -unsaturated group on the conversion of lignin and its β -O-4 model dimers into monomeric aromatics was investigated. The results showed that replacing the native α -hydroxyl group with an α , β -unsaturated group markedly enhanced the decomposition reactivity of the dimer. Specifically, the α , β -unsaturated group promoted C α ─C β bond cleavage, whereas the native α -hydroxyl group led to β -O-4 bond cleavage. This significant enhancement in reactivity was consistent across varied reaction conditions and enabled near-quantitative yields of monomeric aromatics from the dimer containing the α , β -unsaturated group. Kinetic analyses indicated apparent first-order kinetic behavior for both dimers, showing that the α , β -unsaturated group accelerated the reaction rate by a factor of approximately 14 at 120 °C. Moreover, an α , β -unsaturated group generated in situ via dehydration of the α -hydroxyl group during pretreatment effectively facilitated lignin depolymerization. This work outlines a promising approach for developing efficient lignin depolymerization technologies targeting monomeric aromatics.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2026
·
IF 4.5
Linquan Li,Zongqiang Liu,Shanshan Zhang,Weijiong Dai,Yan Wang,Jiajun Zheng,Ruifeng Li
A low-cost seed-assisted route was developed to synthesize plate-like ZSM-5 zeolite. • The key factors governing the synthesis were systematically investigated. • The minimum thickness of the b -axis could reach ∼50 nm. • Reducing b -axis thickness of ZSM-5 zeolite improves its catalytic performance in 1-butene cracking. Plate-like ZSM-5 zeolites, featuring a shortened b -axis that effectively alleviates micropore diffusion limitations, display significant advantages in many catalytic reactions. However, current syntheses rely heavily on expensive organic structure-directing agents (OSDAs) and sometimes toxic fluoride reagents, making a low-cost synthesis route highly desirable. To fulfill this goal, we propose a seed-assisted strategy combined with γ-aminobutyric acid as an additive, which effectively reduces the consumption of OSDA. By tuning key parameters, the b -axis thickness can be precisely controlled during synthesis, the minimum thickness could reach ∼50 nm. Plate-like ZSM-5 zeolites with similar physicochemical properties but different b -axis thicknesses were tested in 1-butene catalytic cracking. Reducing the b -axis thickness could effectively enhance the catalytic activity and stability, the sample (P-6%) with the thinnest b -axis thickness exhibiting the best performance. TGA analysis of spent catalysts confirmed the superior coke tolerance of P-6%, and in situ UV-Vis spectroscopy investigation of organic intermediates formed during the reaction further confirmed its excellent activity and stability. Download: Download high-res image (256KB) Download: Download full-size image
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 9.2
Tao Sun,Yue Wang,Zenghui Li,Anning Jiang,Lijuan Yang,Jijun Feng
Electrocatalysts often undergo reconstruction during the electrochemical process, especially the surface phase. This dynamic evolution makes the relationship between actual microstructure and catalytic activity confusing. Therefore, unraveling this dynamic evolution and further mastering effective methods to provoke advantageous structural emergence is crucial. Herein, we report an electroreduction strategy to stimulate grain boundary-rich Co 3 O 4 nanoneedle going on structure evolution and boosting its catalytic performance toward nitrate reduction reaction (NO 3 RR). Under suitable oxyacid ions solution and reduction potentials, hexagonal Co(OH) 2 nanoplates and oxygen-vacancies (O v ) rich Co 3 O 4-x nanofilm epitaxial growth on Co 3 O 4 nanoneedle. This microstructure evolution enhances the catalytic performance of pristine Co 3 O 4 nanoneedle toward NO 3 RR. Optimal Co 3 O 4-x /Co(OH) 2 @NF electrode achieves a remarkable ammonia Faraday efficiency 93.36 ± 3.66% and a NH 3 yield rate 3.21 ± 0.158 mg h −1 cm −2 at a high potential of 0.05 V vs. RHE. This work presents a novel strategy for engineering high-efficiency electrocatalysts toward NO 3 RR.
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高影响因子
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