RESEARCH ON CHEMICAL INTERMEDIATES
·
2026
·Vol. 52
·期 11
·7913-7930
·
IF 3.3
Mohamed Aziza Ali,Zuberi Muhsin Ally,Mumtaz Mehwish,Suryoprabowo Steven,Lo Diana,Pi Fuwei,Guo Yahui
A multifunctional β-cyclodextrin-functionalized silver nanoparticle (β-CD-AgNP) substrate was developed for selective surface-enhanced Raman scattering (SERS) detection of the organophosphorus pesticide diazinon (DZN). Diazinon is widely used in agriculture to control insect pests on fruits and vegetables, and its residues in food and water are linked to acetylcholinesterase inhibition, neurotoxicity, and aquatic ecotoxicity, prompting strict regulatory residue limits and a pressing need for rapid, sensitive, field-deployable detection methods. In this system, β-CD simultaneously acts as a reducing agent, stabilizer, and host–guest recognition molecule, promoting nanoparticle formation while selectively enriching diazinon near SERS-active sites. UV–Vis spectroscopy, TEM, zeta potential, and SERS analyses confirmed successful nanoparticle formation, effective β-CD functionalization, improved colloidal stability, and enhanced Raman signal amplification relative to bare AgNPs. The platform showed a linear response from 0.01 to 2 ppm ( R 2 > 0.94), a detection limit of 3.15×10⁻ 3 ppm, and good reproducibility (RSD < 6%) in aqueous solution. The application of the method to spiked cucumber samples resulted in recoveries ranging from 101.81% to 119.93%, with a relative standard deviation (RSD) of less than 7% at both 0.5 and 1.0 ppm. A matrix-matched calibration built directly in cucumber extract confirmed near-quantitative recovery (98–100%) at these levels, indicating that the higher aqueous-calibration recoveries reflect matrix-related bias rather than a limitation of the SERS substrate; quantification at 0.01 ppm remained unreliable under both approaches. The β-CD-functionalized substrate also showed improved selectivity toward diazinon over structurally related pesticides, reflecting host–guest molecular recognition. Given its low cost, minimal sample preparation, and portability relative to chromatographic methods, this platform is well suited to on-site regulatory screening and could help close the gap between routine laboratory testing and the growing demand for real-time food safety surveillance. These findings demonstrate a simple strategy for integrating green nanoparticle synthesis with molecular recognition to achieve selective SERS detection of pesticide residues, offering a promising platform for rapid food safety monitoring.
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DOI
高影响因子
AMB Express
·
2019
·Vol. 9
·期 1
·2
·
IF 2.226
Feng Rongfang,Xu Meiying,Li Jianjun,Huang Shaobin,Zhao Gang,Tu Xiang,Sun Guoping,Guo Jun
Two biotrickling filters were operated in continuous (BTF1) and discontinuous (BTF2) modes at a constant empty bed residence time of 60 s for 60 days. From day 60, the operation mode of each BTF was oppositely switched. Higher removal efficiencies of five aromatic pollutants were recorded with BTF1 (> 77.2%). The switch in the operation mode did not alter the removal performance of BTF1. Comparatively, BTF2 was not successfully acclimated in the discontinuous operation mode. Once the mode had been switched to continuous mode, the removal efficiencies of BTF2 on all pollutants increased drastically and finally exceeded the values observed in BTF1, with the single exception of p -xylene. Principle coordinate analysis and analysis of similarities (ANOSIM) showed that the structure of the microbial communities differed considerably between both BTFs (R = 1.000, p < 0.01) as well as before and after the switch in BTF2 (R = 0.996, p < 0.01). The random forest model demonstrated that Mycobacterium , Burkholderia , and Comamonas were the three most important bacterial genera contributing to the differences in microbial communities between the two BTFs. Metagenomics inferred by PICUSt (phylogenetic investigation of communities by reconstruction of unobserved states) indicated that BTF2 had high degradation potential for aromatic pollutants, although those genes involved in biofilm formation were less active in BTF2 than those in BTF1.
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DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2014
·Vol. 32
·期 8
·1099-1110
·
IF 1.42
Yu Rui-lei,Zhang Li-sheng,Feng Yu-hong,Zhang Ruo-yu,Zhu Jin
Polylactide (PLA) was successfully toughened by blending with bio-based poly(ester)urethane (TPU) elastomers which contained bio-based polyester soft segments synthesized from biomass diols and diacids. The miscibility, mechanical properties, phase morphology and toughening mechanism of the blend were investigated. Both DSC and DMTA results manifested that the addition of TPU elastomer not only accelerated the crystallization rate, but also increased the final degree of crystallinity, which proved that TPU has limited miscibility with PLA and has functioned as a plasticizer. All the blend samples showed distinct phase separation phenomenon with sea-island structure under SEM observation and the rubber particle size in the PLA matrix increased with the increased contents of TPU. The mechanical property variation of PLA/TPU blends could be quantitatively explained by Wu’s model. With the variation of TPU, a brittle-ductile transition has been observed for the TPU/PLA blends. When these blends were under tensile stress conditions, the TPU particles could be debonded from the PLA matrix and the blends showed a high ability to induce large area plastic deformation before break, which was important for the dissipation of the breaking energy. Such mechanism was demonstrated by tensile tests and scanning electron microcopy (SEM) observations.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 3
·2343-2350
·
IF 2.993
Wang Yaxiong,Liu Ping,Wang Honghang,Zeng Baoqing,Wang Jianghao,Chi Feng
Applying copper nanowires (CuNWs) composite transparent conductive electrode (CTCE) as transparent conductive anode, a flexible organic light-emitting device (OLED) is demonstrated in this paper. Ultralong CuNWs were synthesized by a simple hydrothermal method. The random conductive grid of CuNWs was transferred to the surface of flexible substrates by vacuum filtration method. In order to reduce the surface roughness and improve work function, polymethyl methacrylate (PMMA) solution and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) solution were spin-coated on the surface of CuNW transparent conductive electrode (TCE) in turn. The CuNW/PMMA/PEDOT:PSS CTCE was applied to an OLED, and the experiment shows that the OLED was of high efficiency. On comparing the OLED with PEDOT:PSS TCE, the maximum brightness and maximum current density of the OLED with CuNW/PMMA/PEDOT:PSS CTCE were increased by 104% and 4 times, respectively.
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高影响因子
Science China-Materials
·
2018
·Vol. 61
·期 2
·243-253
·
IF 4.318
Zhou Jinhua,Chen Ningna,Ge You,Zhu Hongli,Feng Xiaomiao,Liu Ruiqing,Ma Yanwen,Wang Lianhui,Hou Wenhua
Flexible and micro-sized energy conversion/ storage components are extremely demanding in portable and multifunctional electronic devices, especially those small, flexible, roll-up and even wearable ones. Here in this paper, a two-step electrochemical deposition method has been developed to coat Ni fibers with reduced graphene oxide and MnO 2 subsequently, giving rise to Ni@reduced-graphene-oxide@MnO 2 sheath-core flexible electrode with a high areal specific capacitance of 119.4 mF cm −2 at a current density of 0.5 mA cm −2 in 1 mol L −1 Na 2 SO 4 electrolyte. Using polyvinyl alcohol (PVA)- LiCl as a solid state electrolyte, two Ni@reduced-grapheneoxide@ MnO 2 flexible electrodes were assembled into a freestanding, lightweight, symmetrical fiber-shaped micro-supercapacitor device with a maximum areal capacitance of 26.9 mF cm −2 . A high power density of 0.1W cm −3 could be obtained when the energy density was as high as 0.27 mW h cm −3 . Moreover, the resulting micro-supercapacitor device also demonstrated good flexibility and high cyclic stability. The present work provides a simple, facile and low-cost method for the fabrication of flexible, lightweight and wearable energy conversion/storage micro-devices with a high-performance.
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高影响因子
Silicon
·
2026
·
IF 4.1
Xu Ying,Xiao Huidong,Wen Shulong,Wang Yupeng,Chen Chaorong,Sun Yihu
4-aminopyridine wastewater is characterized by high salt content, poor biodegradability, highly toxic and high chemical oxygen demand (COD) concentration. Hypochlorite oxidation is an advanced oxidation technology that shows unique advantages in treating alkaline pyridine compounds wastewater. In the present study, hydroxyl composites were prepared for the catalytic oxidation of calcium hypochlorite for the removal of 4-aminopyridine(4-AP). The preparation of hydroxyl composite materials is based on a 1:1 molar ratio of calcium hypochlorite to hexahydrate and nickel chloride. After centrifugation, the supernatant is removed, and the precipitate is sealed and stored in a refrigerator for future use. The composites were found to be structurally stable before and after the reaction, with irregular polyhedral shapes and mesoporous properties, as analyzed by a variety of characterization means. Under the optimal reaction conditions, i.e., 8 mL of hydroxyl composite, 3 g/L of Ca(ClO) 2 , and an initial pH value of 8–9, the removal rate of 4-AP was 93.3%. High concentrations of chloride, nitrate and carbonate (above 1 mmol/L) had no significant or only weak inhibitory effects on the reaction system. The main active substances in the system were 1 O₂ and ・O₂ − . The vulnerable sites of 4-AP were calculated to be N7 (f—= 0.1878), N1 (f—= 0.1367), C3,5 (f—= 0.0931). This research offers theoretical justification and technical guidance for addressing pesticide wastewater contaminated with 4-AP, and is expected to further expand the application of this system in the treatment of other difficult-to-degrade organic pollutants in the future. This study demonstrates significant practical application potential in industrial wastewater treatment, providing an efficient and stable method for degrading toxic pollutants. Its scientific value lies in elucidating the catalytic mechanism of hydroxyl composite materials and the action mechanism of reactive oxygen species, promoting the progress of environmental remediation technology.
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高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2026
·
IF 15
Luo Weibin,Hou Jiahui,Fan Jie,Zhuang Xiaoyan,Nie Rui,Yao Zilong,Yu Bin,Wang Jun,Guan Daogang,Jin Jian,Wu Hangtian
Background The treatment of Osteomyelitis (OM) faces challenges due to the harmful cycle of bacterial persistence and pathogen-triggered cytokine storms. Conventional antibiotic therapy centers on eliminating bacteria, yet frequently neglects the immunopathological harm following bacterial breakdown. Therefore, there exists an immediate requirement for dual-action treatments capable of simultaneously alleviating multidrug-resistant infections and hyper-inflammatory reactions. Results In this study, single-cell sequencing highlights a TNF/NF-κB-centered transcriptional network which serves as a crucial molecular switch, propelling M1 polarization in macrophages related to OM. Combination of network toxicology and transcriptomic investigations uncovers the key regulatory function of TNF in LTA-triggered cytokine storms in OM. Metabolic sequencing reveals that LTA triggers reprogramming of pyrimidine metabolism in macrophages and synergistically boosts Tnf-α expression. As a result, we created DB-shTnf-α@Gel, an injectable hydrogel that delivers Dalbavancin and shTnf-α self-assembled nanoparticles. This system demonstrated strong anti- MRSA efficacy and interfered with bacterial resistance genes in vitro. In vivo experiments revealed that DB-shTnf-α@Gel has the capacity to oppose macrophage M1 polarization and notably relieve bone damage. Conclusions By accurately zeroing in on TNF-induced excessive inflammation and eliminating multidrug-resistant infections, this nanoplatform presents a synergistic, phased therapeutic approach to surmount the intricate pathology of OM. Graphical abstract
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高影响因子
CELLULOSE
·
2026
·
IF 4.6
Wang Qing,Huang Zhenyang,Chen Zijian,Zhong Yingying,Mo Qijie,Zhang Wei,Yu Mingguang,Wang Hongwu
The development of novel food packaging materials that are both eco-friendly and highly oil-resistant has been identified as a critical challenge in the food packaging industry. Herein, a facile strategy for fabricating food packaging paper with oil and water resistant properties is reported. Specifically, filter paper was used as the substrate, chitosan was employed as the film-forming matrix, and phytic acid was utilized as a crosslinking agent to modify chitosan, resulting in the successful preparation of functional paper with excellent oil and water resistance. The effects of chitosan coating concentration and phytic acid crosslinking time on the oil and water resistance were systematically investigated. The optimal oil and water resistance was achieved when the chitosan coating amount was set at 30 g/m 2 and cross-linked with a 5% wt phytic acid solution for 10 min. The material exhibited oil resistance lasting beyond 24 h and water resistance exceeding 30 min, demonstrating its ability to effectively block oil for prolonged periods and withstand water exposure, suggesting potential utility in food-contact packaging applications.
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高影响因子
RARE METAL MATERIALS AND ENGINEERING
·
2016
·Vol. 45
·期 7
·1664-1668
·
IF 0.236
Zhang Lingjie,Shen Tao,Shen Qianhong,Zhang Ji,Chen Lawson,Fan Xianping,Yang Hui
La 2 Sn 2 O 7 /SnO 2 composite powder was synthesized by chemical co-precipitation, and Ag-La 2 Sn 2 O 7 /SnO 2 electrical contact material was prepared by a powder metallurgy method. Anti-arc erosion properties, mass loss and Vickers hardness of the Ag-La 2 Sn 2 O 7 /SnO 2 composite were investigated, and its anti-arc erosion mechanism was discussed. Results show that the welding force of Ag-La 2 Sn 2 O 7 /SnO 2 composite is much better than that of Ag-SnO 2 , because the new phase La 2 Sn 2 O 7 can increase the viscosity of melt pool and improve wettability between silver and tin oxide to some extent. Meanwhile, Flatter arcing area and “beads-like” particles embedded scatteredly in the surface could decentralize arc energy via “pinning effect”, which decreases temperature rise and weakens the damage of surface structure, and better anti-welding property is obtained. Ag-La 2 Sn 2 O 7 /SnO 2 composite could be a leading candidate material for electrical contacts in the future.
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高影响因子
Progress in Natural Science-Materials International
·
2012
·Vol. 21
·期 6
·472-477
·
IF 1.099
Na YIN,Shi-yan CHEN,Yang OUYANG,Lian TANG,Jing-xuan YANG,Hua-ping WANG
Hydroxyapatite (HAp)/bacterial cellulose (BC) nanocomposites were prepared by an optimal biomimetic mineralization synthesis approach for bone tissue engineering application. BC with ultrafine three dimensional network was negatively charged by the adsorption of polyvinylpyrrolidone (PVP) to initiate the nucleation of HAp. The HAp was grown in vitro along the nanofiber network of BC via dynamic simulated body fluid (SBF) treatment. It was found that rod-like HAp particles in the nano-scale (100–200 nm) homogeneously deposited on the surface of PVP-BC. ATR-Fourier Transform Infrared Spectroscopy (ATR-FTIR) results showed that carbonate-containing HAp crystals resembling natural bones were formed by biomimetic mineralization method. Moreover, the amount of HAp observed increased with increasing mineralization time. And the Ca/P overall ratio ranged from 1.37 to 1.59. The results from Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) indicated that PVP treatment enhanced the apatite nucleation ability of BC with higher HAp deposit amount.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2022
·Vol. 43
·期 9
·2443-2452
·
IF 12.92
Yaojia Cheng,Haoqiang Song,Jingkun Yu,Jiangwei Chang,Geoffrey I.N. Waterhouse,Zhiyong Tang,Bai Yang,Siyu Lu
The sluggish kinetics of oxygen reduction reaction (ORR) hinders the commercialization of Zn-air batteries (ZABs). Manipulating the electronic structure of electrocatalysts to optimize the adsorption energy of oxygen-containing intermediates during the 4e − ORR offers a practical route toward improving ORR kinetics. Herein, we designed a novel ORR electrocatalyst containing Co single atoms and nanoparticles supported by carbon dots-derived carbon nanoflowers (Co SAs/NPs CNF). Co SAs/NPs CNF possessed a very high ORR activity ( E 1/2 of the Co SAs/NPs CNF catalyst is 0.83 V ( vs. RHE)), and outstanding catalytic performance and stability when used as the air-electrode catalyst in rechargeable ZABs (152.32 mW cm −2 , 1000.58 mWh g Zn −1 , and over 1300 cycles at a current density of 5 mA cm −2 ). The Co SAs and Co NPs cooperated to improve electron and proton transfer processes during ORR. Theoretical calculations revealed that the presence of adjacent Co NPs optimized the electronic structure of the isolated Co-N 4 sites, significantly lowering the energy barriers for the rate-determining step in ORR (adsorption of *OOH) and thereby delivering outstanding ORR performance. This work reveals that the combination of supported single-atom sites and metal nanoparticles can be highly beneficial for ORR electrocatalysis , outperforming catalysts containing only Co SAs or Co NPs.
研究领域:
电化学
·
纳米材料科学
·
能源化学
·
催化化学
·
先进电池技术
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.7
Juxia Xiong,Hao Ma,Yingjun Dong,Benjamin Liu,Xiangji Zhou,Linbo Li,Yuanmiao Sun,Xiaolong Zhang,Hui-Ming Cheng
Bi-based catalysts are known to promote the electrochemical reduction of CO 2 to formic acid (HCOOH) or formate (HCOO − ). However, their implementation presents challenges: the first H + /e − pair transfer to form the key *OCHO intermediate on a Bi surface is a slow, kinetically sluggish endergonic process, resulting in a large overpotential and narrow potential window for high HCOOH/HCOO − selectivity. Altering the localized p -orbital electron states of Bi to change intermediate binding behaviors is difficult. We addressed this problem by using an in-situ polymerization method to obtain a polyaniline-Bi hybrid (PANI-Bi) with Bi surrounded by PANI chains. Combined experimental and computational studies indicate that the polyaniline acted as an “electron pump” that facilitated charge transfer from the PANI backbone to the Bi surface and changed the p -orbital electrons of the Bi active sites. This lowered the energy barrier for the adsorption of intermediates and facilitated *OCHO formation. Consequently, a significant increase in formate production was observed, achieving a single-pass carbon efficiency exceeding 48.7% at 800 mA cm −2 . This organic functionalization strategy, aimed at modifying the electronic structure of heterogeneous catalysts, offers a promising approach for achieving highly selective electroreduction of CO 2 at a high current density.
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