ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Xuefang Zhao,Hui Xu,Minzhang Chen,Yong Chen,Xiuqing Kong
The degradation of organic pollution by sulfur-modified nano zero-valent iron(S-nZVI) combined with advanced oxidation systems has been extensively studied. However, the low utilization of nZVI and low reactive oxygen species (ROS) yield in the system have limited its wide application. Herein, a natural organic acid commonly found in citrus fruits, citric acid (CA), was combined with the conventional S-nZVI@Ps system to enhance the degradation of norfloxacin (NOR). The addition of CA increased the NOR removal by about 31% compared with the conventional S-nZVI@Ps system under the same experimental conditions. Among them, the enhanced effect of CA is mainly reflected in its ability to promote the release of Fe 2+ and accelerate the cycling of Fe 2+ and Fe 3+ to further improve the utilization of nZVI and the generation of ROS; it also promotes the dissolution of the active substance (FeS) on the surface of S-nZVI to further improve the degradation rate of NOR. More importantly, the chelate of CA and Fe 2+ (CA-Fe 2+ ) had higher reactivity than alone Fe 2+ . Free radical quenching and electron spin resonance (ESR) experiments indicated that the main ROS for the degradation of NOR in the CA/S-nZVI@Ps system were SO 4 •- and OH•. CA-bound sulfur-modifying effects on NOR degradation was systematically investigated, and the degradation mechanism of NOR in CA/S-nZVI@Ps system was explored by various techniques. Additionally, the effect of common anions in water matrix on the degradation of NOR in CA/S-nZVI@Ps system and its degradation of various pollutants were also studied. This study provides a new perspective to enhance the degradation of pollutants by S-nZVI combined with advanced oxidation system, which can help to solve the application boundary problem of S-nZVI.
研究领域:
环境科学
·
化学工程
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DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Yuhua Zhang,Ziyu Zhang,Yang Tian,Zhinan Fu,Chen Hua,Li Li,Fang Zhao,Xuhong Guo
Spherical polyelectrolyte brushes (SPBs) are widely applied in protein controllable adsorption, nanocatalysis, and surface modification, while the polystyrene (PS) nanoparticles covered with well-distributed photoinitiator 2-[p-(2-hydroxy-2-methylpropiopenone)]-ethylene glycol methacrylate (HMEM) shells (PS@HMEM) are of critical importance to synthesize SPBs by photoemulsion polymerization. In this paper, a two-step continuous flow strategy consisting of emulsion polymerization of PS nanoparticles and a coating of HMEM was rationally designed for the construction of PS@HMEM core–shell nanoparticles in a microreactor. The structure of PS@HMEM core–shell nanoparticles was characterized by Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), and transmission electron microscope (TEM). The electron paramagnetic resonance (EPR) technique was employed to estimate the grafted amount of HMEM, and it was verified that feeding through a single or two streams had a significant advantage for the optimization of the “starved condition.” This work provided a new strategy for synthesizing PS@HMEM core–shell polymer nanoparticles and showed great potential for the construction of other functional nanoparticles.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Siyu Huang,Yang Yang,Jun Li,Linyutong Zhu,Qiu Zhang,Liying Pan,Xueyue Lv,Guangdong Zhao
Ceramic aerogels exhibit an extremely high porosity, low weight, and exceptionally low thermal conductivity, making them suitable as insulating materials for use in challenging environments. The widespread application of conventional ceramic aerogels is typically constrained by the fragile nature of the material and its high-temperature infrared radiation transparency. Here, we successfully prepared SiTiOC/PS/TiO 2 hybrid aerogels by effectively synthesizing them using polyvinyl alcohol (PVA) as the carbon skeleton and reinforcing them with polystyrene microspheres (PS) and PAN nanofibers loaded with TiO 2 (TiO 2 /PAN NFs), and TiO 2 /PAN NFs as shading material. This was achieved through a combination of the polymer precursor transformation method, sol-gel method, and techniques such as freeze-drying and electrostatic spinning. The findings indicated that the fabricated SiTiOC/PS/TiO 2 hybrid aerogels exhibited a lightweight structure, exceptionally high infrared reflectivity, remarkably low thermal conductivity, and outstanding mechanical characteristics. The successful synthesis of the SiTiOC/PS/TiO 2 hybrid aerogels offers a novel approach for advancing the production of various thermal insulation materials.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 11
·110532
·
IF 3.721
Wei Ye,Muhammad Zaheer,Lianwei Li,Jun Wang,Hongli Xu,Chaoyang Wang,Yonghong Deng
Solid polymer electrolytes (SPE) are of great importance for developing the next-generation all-solid-state lithium metal batteries, which are featured by their high safety and extraordinary energy density. Herein, by using the highly efficient azide-alkyne click chemistry, a series of long-subchain hyperbranched copolymers from various compositions of AB2 macromonomers of PCL-2N3 (polycaprolactone) and PS-2N3 (polystyrene) were synthesized and employed as SPE polymer host. Taking advantage of the hyperbranched structure, the crystallization of PCL was successfully suppressed, and endows the SPE with high ionic conductivity and high mechanical properties simultaneously. By doping with LiFSI, the SPEs thereof exhibit high ionic conductivity (1.59 × 10−4 S cm−1 at 80 °C), broad electrochemical stability window (>4.6 V) and high lithium-ion transference number (>0.40). The electrolyte film based on the HB-II (the hyperbranched PCL/PS copolymer with 70 wt% PCL and 30 wt% PS) shows an ionic conductivity of 1.36 × 10−5 S·cm−1 at 80 °C and a high lithium transference number of 0.49. The all-solid-state LiFePO4//Li cell with HB-II-based SPE delivers a high and stable discharge capacity (133 mAh·g−1 at 1 C, with 90% capacity retention after 300 cycles) and exhibits long lifetime up to over 1200 cycles, owing to its relatively high ionic conductivity and good interfacial stability.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2026
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IF 5.1
Zongxiao Li,Xiaoping Ouyang,Zhifang Chai,Duck Young Chung,Fangbao Wang,Yihui He,Tao Bo,Wenwen Lin,Mercouri G Kanatzidis
Ultrafast scintillators are essential for next-generation radiation detection, positron emission tomography, and high-speed medical imaging. All-inorganic CsPbBr3 perovskites are attractive candidates because of their high stopping power, and excellent optical quality, yet their long carrier lifetimes result in slow scintillation responses on the order of hundreds of nanoseconds. Here we demonstrate that controlled over-doping with Br2 produces CsPbBr3.03 single crystals with subnanosecond scintillation at room temperature while preserving crystal quality. Single crystals grown by the Bridgman method exhibit high transparency and maintain the orthorhombic perovskite structure. Br2 over-doping induces a slight lattice expansion (about 0.42% increase in unit-cell volume) while maintaining the orthorhombic perovskite phase and high optical transparency. Optical absorption reveals a slight redshift of the absorption edge after Br2 introduction, indicating a modified defect landscape. Time-resolved photoluminescence and radioluminescence measurements show that Br2 doping creates dense and efficient recombination centers that reduce the scintillation decay time from more than 100 ns in undoped crystals to 350 ps under 5.486 MeV α-particle excitation, and the scintillation decay time decreases by two orders of magnitude. The doped crystals also achieve a spatial resolution of 12 lp/mm in X-ray imaging. These results reveal a defect-engineering route for achieving ultrafast scintillation in halide perovskites and highlight the potential of Br2-modified CsPbBr3 for fast timing applications.
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高影响因子
TALANTA
·
2024
·
IF 5.6
Li Wang,Jianli Sun,Xiaoxuan Wang,Milan Lei,Zengliang Shi,Lei Liu,Chunxiang Xu
Rapid and sensitive detection of multiple biomarkers by lateral flow immunoassay (LFIA) remains challenging for signal amplification for commonly used nanotags. Herein, we report a novel LFIA strip for visual and highly sensitive analysis of two cardiac biomarkers based on functionalized gold nanoparticles @ polystyrene microsphere (Au@PS）microcavity as surface-enhanced Raman scattering (SERS) tags. Antibody-modified Au@PS was designed as a SERS label. The evanescent waves propagating along the surface of the PS microcavity and the localized surface plasmons of the gold nanoparticles were coupled to enhance the light-matter interaction synergistically for Raman signal enhancement. In this strategy, the proposed Au@PS SERS tags-based LFIA was carried out to quantify the content of the heart failure and infarct biomarkers synchronously within 15 min and get the limits of detection of 1 pg/mL and 10 pg/mL for cardiac troponin I (cTnI) and N-terminal natriuretic peptide precursor (NT-proBNP), respectively. The results demonstrated 10–20 folds more sensitivity than that of the standard colloidal gold strip and fluorescent strip for the same biomarkers. This novel quantitative LFIA shows promise as a high-sensitive and visual sensing method for relevant clinical and forensic analysis.
研究领域:
医学诊断
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纳米技术
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生物化学
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DOI
PubMed
高影响因子
Micro and Nanostructures
·
2026
·
IF 3.1
Yuan Yuan,Min Zang,Fanxia Kong,Sen Yang,Xiaoyan Yang,Limei Li
PS@Ag@ZIF-8 sensor is constructed via room-temperature in-situ growth on monolayer colloidal crystals. • Introduced Ag nanoparticles greatly improve the sensor's optical features and structural color saturation. • The sensor selectively detects acetonitrile and alcohols by visible color change and reflection peak shift. • Fast response (<3 s), good recyclability for acetonitrile and high stability are achieved. • The design inspires low-cost portable gas sensors for environmental monitoring. In this work, we fabricated a high-performance optical sensor PS@Ag@ZIF-8 by sequentially depositing silver nanoparticles (NPs) and MOF thin films on the monolayer colloidal crystals surface via an in-situ growth method at room temperature. The rational introduction of silver NPs into the sensor structure remarkably improves its optical properties and structural color saturation. This sensor possesses excellent selective detection capability toward acetonitrile and alcohols. Moreover, the type and concentration of volatile organic pollutants (VOCs) vapors can be visually analyzed according to the shift of reflection peaks and distinct color differences in optical images. Meanwhile, it delivers an ultrafast response (<3 s) along with outstanding repeatability and recyclability. More importantly, it possesses a wide dynamic detection range, great linearity and exhibits excellent stability during operation. It is anticipated that this sensor provides a valuable reference for the development of low-cost, real-time and portable gas sensors for environmental monitoring. Download: Download high-res image (314KB) Download: Download full-size image
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yongbin Qin,Jun Guan,Dan Xu,Chengyin Wang,Jun Sun,Zichen Zheng,Wei Gu,Kewei Liu,Carla Bittencourt,Lifeng Zhang
Alpha-Fetoprotein (AFP) is an important tumor biomarker closely associated with the early diagnosis of hepatocellular carcinoma and other diseases. To achieve rapid and highly sensitive AFP detection, this study developed a label-free electrochemical impedance immunosensor with enhanced sensitivity based on Polystyrene- block -poly acrylic acid (PS-b-PAA) thin films and a biotin-streptavidin (B-SA) amplification strategy. The sensor utilizes the unique properties of PS-b-PAA thin films, where carboxyl groups (-COOH) form covalent bonds with the amino groups (−NH 2 ) of streptavidin, combined with the B-SA system to achieve efficient antibody immobilization. The results showed that the B-SA system significantly enhanced antibody immobilization efficiency, reduced non-specific adsorption, and improved the sensitivity and specificity of electrochemical signals. As a signal amplification strategy, the biotin-streptavidin system increased the sensing signal by approximately 2.19-fold. The sensor exhibited a linear response range from 0.05 ng/mL to 300.00 ng/mL and a detection limit of 0.02 ng/mL. Moreover, the sensor's performance in real human serum samples was consistent with that of the enzyme-linked immunosorbent assay (ELISA), demonstrating excellent reproducibility and long-term stability. This study shows that the fabricated electrochemical impedance immunosensor, based on PS-b-PAA thin films and the B-SA system, exhibits excellent performance in AFP detection, providing a reliable, rapid, and efficient solution for early cancer biomarker detection.
研究领域:
生物传感器
·
分析化学
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癌症诊断
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纳米材料
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电化学
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DOI
高影响因子
Frontiers in Environmental Science
·
2025
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IF 3.7
Xi Jingya,Xu Han,Yao Lingzhi,Sun Yijia,Zhao Shuyi,Huang Qing,Li Yan
Understanding the aging processes of microplastics (MPs) and their behavior under dynamic wet-dry cycles is critical for accurate environmental risk assessment, particularly in unsaturated zones. This study investigates the impact of aging on the retention and remobilization dynamics of polystyrene (PS) microplastics in unsaturated porous media. We employed light-aged PS MPs and conducted column experiments using sea sand under multiple wetting-drying cycles. Key physicochemical properties of the MPs were characterized, and their retention and remobilization were quantified by monitoring effluent concentrations.Aging significantly altered MP properties, increasing their surface negative charge and hydrophilicity. Consequently, aging suppressed the remobilization of retained MPs during drying phases. After five cycles, the total retained fraction of aged MPs (76.88%) was consistently higher than that of pristine MPs (72.83%). Remobilization was primarily driven by mobile air-water interfaces (AWI) once water saturation fell below a critical threshold of approximately 0.6. Although aging increased electrostatic repulsion (which hinders retention), it also increased hydrophilicity, which significantly weakened AWI-driven remobilization during drying. This retention-promoting mechanism (reduced AWI remobilization) outweighed the opposing effect of electrostatic repulsion, leading to greater overall retention of aged MPs. This study highlights the complex regulatory role of aging on MP fate and provides critical insights for assessing the environmental risks of aged microplastics in dynamic unsaturated systems.
研究领域:
环境科学
·
土壤物理学
·
水文地质学
·
环境化学
·
胶体与界面科学
·
污染物迁移
·
非饱和带水文学
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Qilong Zhang,Zhicai Zhu,Da Shen,Hui Yang
This paper reports a feasible method to prepare pure organic polymeric nanocomposites with enhanced dielectric and hydrophobic performance. Homogeneous polystyrene (PS) microspheres with an average diameter of about 250 nm was firstly synthesized through emulsion polymerization. The blend film containing PS, PDMS and P(VDF-TrFE) are prepared by a simple solution-blending and spin-coating method. The blend film exhibits enhanced dielectric and hydrophobic properties. Typically, the dielectric constant of the blend film with 23 wt% PS reaches 21 at 100 Hz, which is 3 times that of PDMS/P(VDF-TrFE) (mass ratio: 2/3) due to enhanced interfacial polarization caused by PS addition. Meanwhile, the blend film with 23 wt% PS possesses a large apparent contact angle of 125° because the presence of a rough surface makes the solid-liquid contact surface larger than the apparently observed area, thus enhancing hydrophobicity. All the improved performances show great potential application for electrowetting devices.
研究领域:
材料科学
·
电气工程
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DOI
高影响因子
Materials
·
2026
·Vol. 19
·期 8
·1479
·
IF 3.7
Jingwei Yang,Fangbao Wang,Liang Chen,Tao Bo,Zhifang Chai,Wenwen Lin
Large-sized, room-temperature ultrafast scintillator single crystals are highly demanded for fast timing applications such as time of flight–positron emission tomography, high-speed medical imaging, and pulse heavy-ray detection. Sub-nanosecond scintillation was discovered in 16 mm sized CsPbCl3Brxsingle crystals in our previous research. In this work, the crystal size of CsPbCl3Br0.03was enlarged to 2 inches (50.8 mm). Meanwhile, by precisely optimizing the vertical Bridgman growth process, we further increased the concentration of Br dopant to realize even faster scintillation decay. In this study, we conducted a series of tests on the grown crystals, including temperature-dependent photoluminescence tests, alpha particle excitation tests, X-ray imaging tests, etc. Via the strategy of the incorporation of Br2, Br dopant introduces highly efficient fast recombination centers in perovskite CsPbCl3Br0.03crystals, resulting in an unprecedently fast scintillation decay time of 303 ps under241Amα-particle excitation, which is significantly shorter than that of the pure CsPbCl3and all other perovskites by at least two orders of magnitude. Benefiting from the excellent optical transparency and high crystalline quality of the CsPbCl3Br0.03crystal, an X-ray spatial resolution of up to 20 lp/mm is achieved. These results further demonstrate the great potential of large-sized CsPbCl3Brxsingle crystals for fast timing applications.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Zhuofan Huang,Qintie Lin,Haoyu Luo,Pengran Guo,Qingsong Weng,Yongqian Lei,Shuailong Cheng,Shuang-Shuang Liu
Progesterone (PGT), a widely used progestogen, has become a refractory pollutant present in urban runoff. The removal of PGT in wastewater is urgent owing to its endocrine disruption. In this study, a nano-CuO loaded halloysite nanotube (CuO/HNTs) was prepared by a simple hydrothermal method, which could be used as a catalyst to activate persulfate (PS) for the degradation of PGT. The characterizations showed that the nano-CuO was uniformly loaded on the HNTs to form corn-like structures with a large specific surface area. The optimal PGT degradation efficiency (100%) was achieved with the addition of 0.5 g/L catalyst and 7 mM PS. The effects of pH, HCO 3 – and Cl - on the catalytic activity of the CuO/HNTs-PS system were investigated. The results showed that 1) pH had little effect due to the buffer effect of Al 2 O 3 in HNTs, and nearly neutral solutions were obtained after reaction even in strong acidic or alkaline conditions, 2) low concentrations of HCO 3 – and Cl - had almost no impact on PGT degradation. Furthermore, the degradation mechanism was explored by quenching reactions, XPS, EPR studies and electrochemical experiments. The results demonstrated that the reaction was divided into the free radical pathway (SO 4 •- and •OH generation by the mutual transformation of PS, Cu(I), Cu(II), and Cu(III)) and the nonradical pathway (electron transfer process from the organic pollutant to the CuO/HNTs). In addition, the byproducts of PGT in the process were determined by LC-MS, and the possible transformation pathways were proposed. The CuO/HNTs-PS system might provide some new insights for the remediation of wastewaters.
研究领域:
环境科学
·
生物学
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高影响因子
危险品化学品经营许可证（带存储）