Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Zhenchao Gu,Zhou Li,Ying Yu,Yufei Hu,Lirong Chen,Shuaishuai Zhang
The widespread use of antibiotics has exacerbated water pollution, especially as traditional flocculation methods struggle to effectively remove persistent dissolved pollutants. Traditional coagulants often fall short of high-quality water standards due to residual toxicity and degradation issues. In contrast, natural polysaccharide-based polymeric flocculants show great promise. This study developed an efficient composite coagulation system using the complex coacervation method, enabling in situ self-assembly of chitosan (CS) and sodium carboxymethyl cellulose (CMC) in aqueous solution. The formation conditions were optimized via conductivity and Zeta potential analyses. FTIR, XPS, and SEM were used to probe the composite's microscopic structure and mechanism. Results showed the CS-CMC system outperformed chitosan alone, achieving a 99.70 % turbidity removal rate in simulated Yellow River water. It also efficiently removed various pollutants, with 87.60 % norfloxacin (NOR) and 50.12 % tetracycline (TC) removal rates. The adsorption kinetics of NOR and TC followed pseudo-second-order and intraparticle diffusion models, indicating unique interaction mechanisms beyond simple adsorption, with TC adhering to the Langmuir model and Temkin model, NOR to the Freundlich model. This eco-friendly flocculant offers an efficient, multifunctional solution for green water treatment.
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高影响因子
DESALINATION
·
2025
·
IF 9.8
Jiangjiang Lv,Zhongwei Zhao,Xuheng Liu,Xingyu Chen,Jiangtao Li,Fenglong Sun
With the surging demand for rubidium and cesium, rubidium and cesium extraction resources have gradually expanded from ores to brines to ensure the security of supply of key metals. However, traditional adsorbents of heteropoly salts inevitably suffer from environmental pollution risks, unsustainability, and cumbersome process flows. In this study, potassium phosphotungstate is employed as an ammonium-free adsorbent for sustainably extracting Rb and Cs from salt lake brine. K 3 PW 12 O 40 shows high adsorption capacity (37.71 mg/g for Rb and 60.42 mg/g for Cs) and fast adsorption kinetics (adsorption equilibrium within only 2 min). The adsorbent also exhibits excellent selectivity, with the separation coefficients of Rb/K up to 167.95 and those of Cs/K up to 759.07. It also maintains chemical stability within a broad pH range of 2–10. The desorption efficiency of rubidium and cesium is up to 99.8 % and 85.6 % respectively. After five desorption-adsorption cycles, the adsorption capacity of Rb and Cs remains at 99.8 % and 86.7 % of the initial adsorption capacity. The adsorbent selectively adsorbs Rb + and Cs + from the practical brine even in the presence of a large number of co-existing ions. The Rb and Cs adsorption mechanism for K 3 PW 12 O 40 was primarily ionic exchange with K. The adsorption process provides excellent performance and environmental advantages based on the salt lake industrial cluster. Efficient adsorption performance of Rb and Cs was achieved without the emission of ammonia nitrogen pollutants and the use of ammonium salt chemicals. This study offers a sustainable alternative for extracting Rb and Cs from salt lake brine.
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Coatings
·
2025
·Vol. 15
·期 12
·1430
·
IF 2.8
Yu Gao,Xu Zhao,Yilin Xie,Shiyu Yan,Lichun Xiao,Kairong Ding,Jing Cai,Qina Sun
In this study, a novel hybrid adsorbent polydopamine-based nano-zirconium phosphate coated resin (DPZrP) was successfully synthesized, where zirconium phosphate (ZrP) was surface-anchored onto a polystyrene ion-exchange resin (D001) via polydopamine (PDA) mediation. Characterization results indicated that PDA, acting as an interfacial bridge, not only achieved the stable loading of ZrP but also exerted a spatial confinement effect on ZrP through its polymeric cross-linked structure, thereby effectively suppressing the agglomeration of nanoparticles. Compared with pristine D001 and pure ZrP, the hybrid material DPZrP exhibited superior adsorption performance for Cs+. The adsorption capacity of DPZrP for Cs+reached a theoretical maximum of 921.99 mg/g at 333 K. Adsorption kinetic studies indicated that adsorption equilibrium was reached within 120 min, and the reaction rate constant was 1.55 times that of DZrP. The pH effect experiment showed that DPZrP maintained Cs+removal rates of 73.4% and 58.1% under strongly acidic (pH = 2) and strongly alkaline (pH = 12) conditions, respectively. When the molar ratio of Ca2+to Cs+was as high as 64, the Cs+removal rate of DPZrP was 19.3% and 30.4% higher than those of DZrP and D001, respectively. Dynamic column experiments revealed that after treating 2000 bed volumes of simulated wastewater ([Cs+]0= 2.5 mg/L), the Cs+concentration in the effluent remained below 0.5 μg/L, with breakthrough occurring at 3000 BV. After five consecutive adsorption–desorption cycles, the Cs+removal rate of DPZrP remained at 88.4%. These studies confirmed the dispersion effect of PDA on ZrP, and the synthesized DPZrP possessed both rapid capture ability and high adsorption capacity for Cs+. Thus, it provides an efficient adsorbent for the safe purification of nuclear waste liquids.
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SENSORS
·
2025
·Vol. 25
·期 24
·7462
·
IF 3.5
Yuanyue Lu,Yong Mei,Yingying Gu,Ye Tao,Yuhan Yang,Jiao Yu,Yang Zhang,Lin Liu,Xin Li
An electrochemical immunosensor was fabricated to identify CA15-3, a biomarker for breast cancer (BC). A composite sensor substrate made of “zeolitic imidazolate framework-8” (ZIF-8) and “reduced graphene oxide” (rGO) was chosen and its conductivity was further improved by the addition of chitosan (CS)-doped gold nanoparticles (AuNPs). The CS@AuNPs are able to conjugate with antibodies via the strong Au-S interaction, which offers multiple active sites for antibody immobilization and enhances the sensor performance. This immunosensor is capable of ultrasensitive detection of CA15-3 by specific antigen–antibody –interactions. In healthy people, normal serum CA15-3 is up to 25 U/mL. Under optimized experimental conditions, the alteration in the signal intensity measured by the sensor was related to the CA15-3 activity. The quantitative relationship was linear over 0.001–400 U/mL with a limit of detection (LOD) of 0.0031 U/mL at a “signal-to-noise ratio” (S/N) of 3 and a “correlation coefficient” (r2) of 0.9983. The developed immunosensor showed great accuracy, stability, and selectivity, and was able to detect CA15-3 in human serum samples. These results validate its potential as a reliable analytical platform for BC diagnosis and early clinical screening.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Pengyu Li,Xiaohua Feng,Xiangkui Liao,Shihan Sheng,Axin Huang,Yi Liu,Hua Li
Developing efficient microwave-absorbing coatings via thermal spraying is usually hindered by the thermal demagnetization and oxidation of fillers. Herein, a low-temperature flame spraying strategy is proposed to fabricate Nd-doped BaFe 12 O 19 /nano-carbon spheres (CS)/polyimide (PI) coatings. By systematically controlling the feed rate of the starting feedstock, we precisely modulate filler dispersion and coating microstructure evolution, thereby inducing significant transitions in the dominant microwave attenuation mechanisms. At high feed rates, limited CS addition promotes localized surface plasmon resonance (LSPR) and metallization effects within the surface-dense layer, while excessive CS loading induces an overconnected network and prominent skin effect, impairing microwave absorption (MA) in both cases. Conversely, under low feed rates, favorable thermodynamic and kinetic conditions enable the formation of PI-encapsulated spherical filler structures in the surface region. This unique structure effectively suppresses LSPR and the skin effect, enhances polarization losses, prevents excessive conductivity rise (mitigating impedance mismatch), and thus optimizes over MA. Consequently, the high-feed-rate coating delivers a minimum reflection loss ( RL min ) of−39.1 dB and an effective absorption bandwidth ( EAB ) of 3.7 GHz at a thickness of 4.3 mm. In contrast, the coating with PI-encapsulated spherical filler structures achieves a better RL min of −52.3 dB and a wider EAB of 6.1 GHz at 2.1 mm. Furthermore, the coatings demonstrate outstanding adhesion, achieving Class 0 in the cross-cut testing. Scratch testing demonstrates excellent cohesion and interfacial robustness without catastrophic delamination. The results would give critical mechanistic insight into establishing scalable technical route for engineering flame-sprayed microwave absorbers with simultaneously enhanced structure-function integration and long-lasting mechanical performance.
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Journal of Biomedical Nanotechnology
·
2021
·Vol. 17
·期 9
·1711-1725
·
IF 4.099
Zhang Ru,Luo Shang,Hao Lin-Kun,Jiang Yun-Ying,Gao Ying,Zhang Ning-Ning,Zhang Xue-Cheng,Song Yi-Min
In order to improve the therapeutic effect, prolong the action time and reduce the side effects of the first generation thrombolytic drug urokinase (UK), a novel UK/multi-walled carbon nanotubes (MWCNTs)-chitosan (CS)-arginine-glycine-aspartic acid (Arg-Gly-Asp) (RGD) drug delivery
system was synthesized by chemical bonding/non covalent bond modification/ultrasonic dispersion. The results showed that the diameter of the UK/MWCNTs-CS-RGD drug delivery system was about 30–40 nm, there was a layer of UK was attached to the surface of the tube wall, and the distribution
was relatively uniform. The average encapsulation efficiency was 83.10%, and the average drug loading was 12.81%. Interestingly, it also had a certain sustained-release effect, and its release law was best fitted by first-order kinetic equation. Moreover, the accelerated and long-term stability
test results show that it had good stability. Compared with free UK, UK/MWCNTs-CS-RGD had thrombolytic effect in vitro. In addition, MTT experiment showed that the prepared MWCNTs-CS-RGD nanomaterials had good biocompatibility. A rabbit model of carotid artery thrombosis was used to
conduct targeted thrombolysis experiments in vivo. Compared with free UK, UK/MWCNTs-CS-RGD could be enriched in the thrombosis site to achieve thrombus targeting. UK/MWCNTs-CS-RGD drug delivery system was expected to become an effective thrombolytic drug for targeted therapy of thrombosis.
研究领域:
药理学
·
生物医学工程
·
纳米医学
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PubMed
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 23
·9146-9151
·
IF 8.067
Ming-Ze Li,Lin-Tao Jiang,Shao-Min Pei,Bin-Wen Liu,Xiao-Ming Jiang,Guo-Cong Guo
Two new IR NLO compounds, namely Rb2Zn3P4S13 (1) and Cs2Zn3P4S13 (2), have been obtained by introducing d10 closed-shell cations in an alkali-metal containing thiophosphate system. Compounds 1 and 2 are isostructural and feature a 3D [Zn3P4S13] anionic framework. Both compounds exhibit moderate phase-matching SHG intensities at 1910 nm (0.1 × AGS for 1 and 2) and high LIDTs (6.1 × AGS for 1 and 5.2 × AGS for 2). They have wide transparent regions of 2.5–17.7 μm and 2.5–17.0 μm for 1 and 2, respectively, which cover the important far-IR atmospheric window of 3–5 and 8–14 μm for practical applications. Both compounds simultaneously contain two types of NLO-active thiophosphate units (PS4 and P2S6) in their structures, which to the best of our knowledge, is unprecedented in known IR NLO thiophosphates. The NLO efficiencies of 1 and 2 are mainly due to the covalent [Zn2P2S7]2− framework, in which the contribution of P2S6 units is remarkably larger than that of the PS4 units. This work sheds light on the design of promising IR NLO materials by mixing different thiophosphate functional motifs.
研究领域:
材料科学
·
晶体化学
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高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Run Ye,Bin-Wen Liu,Xiao-Ming Jiang,Jian Lu,Hui-Yi Zeng,Guo-Cong Guo
Exploration of a new nonlinear optical (NLO)-active functional motif is important in the rational design of promising infrared (IR) NLO materials. Compared with typical tetrahedral MQ4 (M = IIB, III, IV metals; Q = S, Se) motifs, MQ3 (M = As, Sb) pyramids favor high second-harmonic generation (SHG) efficiency while frequently hindering phase matching (PM) because of excessively large optical anisotropy. The surfactant–thermal method was first adopted to achieve PM in MQ3-containing systems and synthesize mixed covalent–ionic IR NLO materials. Two new thioarsenates of AMnAs3S6 (A = Cs, Rb) exhibiting strong PM SHG efficiencies comparable to commercial AGS and laser-induced damage thresholds of one order higher than AGS were obtained. The [As3S6]3– unit in their structures is an unprecedented NLO-active functional motif, which can be useful in designing new IR NLO compounds with large SHG efficiency. In addition, the surfactant–thermal method provides a new general strategy for synthesizing new IR NLO materials.
研究领域:
材料科学
·
化学
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yunyun Huang,Hongju Ren,Huihuang Fang,Dong Ouyang,Chongqi Chen,Yu Luo,Li Lin,Dabiao Wang,Lilong Jiang
Ammonia decomposition for onsite hydrogen production has been regarded as an important reaction which links to efficient hydrogen storage, transport and utilization. However, it still remains challenging to develop efficient catalysts with robust stability for ammonia decomposition. Herein, an integrated strategy was employed to synthesize Ru/SiO 2 @N-CS via wrapping a thin layer of N-doped carbon onto the SiO 2 sphere, following the anchor of Ru nanoparticles (NPs) onto the support. The obtained Ru/SiO 2 @N-CS (Ru loading: 1 wt%) shows a promising performance for ammonia decomposition, reaching 94.5 % at 550 °C with a gas hourly space velocity (GHSV) of 30 000 mL g cat -1 h −1 . The combination of the SiO 2 as the core prevents the degradation of N-doped carbon layers and then enhance the durability of the catalysts, remaining stable after 50 h at evaluated temperatures. Adequate characterizations were used to illustrate the effect of microchemical environment on ammonia decomposition activity of Ru/SiO 2 @N-CS catalyst under different calcination atmosphere and the correlation between structure and performance.
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Journal of Macromolecular Science Part B-Physics
·
2026
·
IF 1.7
Xinyi Wan,Mengmeng Xiong
Flexible wearable strain sensors that accurately capture joint motion are essential for rehabilitation assessment, motion monitoring, and human–machine interaction. However, conventional hydrogel sensors often suffer from limited mechanical robustness, poor durability, insufficient conductivity, or biocompatibility concerns caused by conductive fillers and chemical crosslinkers. Here, we report a multifunctional biocompatible hydrogel strain sensor, PCH, constructed from a polyvinyl alcohol/chitosan (PVA/CS) double-network matrix, hydroxyl ethylidene diphosphonic acid (HEDP)-mediated dynamic coordination crosslinking, and potassium chloride (KCl)-based ion conduction. FTIR analysis confirms the formation of a hybrid PVA/CS–HEDP network stabilized by hydrogen bonding and phosphonate-associated interactions, contributing to enhanced mechanical integrity. The PCH hydrogel exhibits favorable tensile properties, stable cyclic loading–unloading behavior, and reliable durability. Electromechanical tests show a linear and sensitive strain response with a gauge factor of 0.84 and high linearity (R2 = 0.9976). In joint mobility monitoring, PCH generates precise angle-dependent signals during ±90° wrist bending and maintains stable output under continuous bidirectional motion. It also shows repeatable finger-joint sensing performance and favorable cytocompatibility, hemocompatibility, and skin compatibility, demonstrating strong potential for real-time wearable joint monitoring.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Yifan Yue,Baohe Wang,Aiping Wang,Fuying Zhao,Jing Zhu,Jing Ma
The catalytic efficiency for methyl methacrylate (MMA) production via aldol condensation of methyl propionate (MP) and formaldehyde (FA) depends on the acid–base and structural properties of the catalyst. Inspired by this, a synergistic design strategy is implemented by fabricating Cs/Al-MCM-41 catalysts, where Al doping preserves ordered mesopores and tunes acid–base properties. This approach generates an optimal density of medium acid sites together with a balanced distribution of weak-to-medium base sites, leading to 90% MMA selectivity and a space-time yield of 0.29 g/(gcat·h). Moreover, the mesoporous confinement not only enhances the dispersion of Cs active species but also suppresses the condensation of coke precursors, thereby significantly improving the catalyst stability. Density functional theory (DFT) calculations reveal that basic Cs–O–Si sites and acidic Al sites cooperatively activate MP and FA, promoting aldol condensation. This work demonstrates that the integration of targeted acid–base regulation with structural confinement provides a rational catalyst design principle for efficient aldol condensation.
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SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Zhibo Zhou,Yunqing Gu,Yun Ren,Zhou Li,Denghao Wu,Zhenxing Wu,Chengqi Mou
P(NIPAM-AM)/CS/TA-Fe 3+ hydrogel integrates NIR actuation and self-sensing. • Optimized network enables a 4.7 s fast response and 104° maximum bending. • TA-Fe 3+ coordination offers a high photothermal conversion efficiency of 27.76%. • Linear resistance-strain mapping predicts bending angles with ≤ 2.67% error. • The dual-function material allows real-time feedback for closed-loop control. Conventional hydrogel actuators often suffer from single functionality and a lack of real-time state feedback, restricting their potential in closed-loop control and intelligent applications. To address this, we designed a synergistically crosslinked composite hydrogel based on poly(N-isopropylacrylamide-co-acrylamide) (P(NIPAM-AM)), tannic acid-iron ion (TA-Fe 3+ ) complexes, and chitosan (CS). This hydrogel integrates near‑infrared (NIR)‑driven actuation with resistive self‑sensing and exhibits excellent shape programming and multidirectional actuation capabilities. By systematically optimizing the composition, the hydrogel with 0.1 mL of CS solution achieves a rapid response time of only 4.7 s and a maximum bending angle of 104°. Furthermore, at an Fe 3+ content of 120 mg, the hydrogel demonstrates a high photothermal conversion efficiency of 27.76% and an initial conductivity of 2.549 (Ω·m) −1 . It exhibits excellent self-sensing characteristics, with a bending gauge factor of 0.019 and high angle-sensing accuracy with an error of ≤ 2.67%. This work provides a simple and efficient strategy for developing intelligent soft materials that integrate actuation and sensing. Download: Download high-res image (220KB) Download: Download full-size image
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