Journal of Water Process Engineering
·
2024
·
IF 6.3
Ziming Luo,Mengqiang Tan,Jianyi Song,Jingyao Sun,Qiao Lan,Jian Liu
In this study, a continuous flow catalytic reactor based on three-dimensional porous sponge bed with the uniform distribution of catalyst to treat 4-NP wastewater efficiently. The porous sponge is used as a support to construct polyelectrolyte multilayers by loading dopamine. And the multilayer polyelectrolyte is closely bound to dopamine to form polyelectrolyte film, and the nanocatalysts are synthesized by electrostatic adsorption of precursors. The reactor realizes the uniform and stable distribution of the catalyst in the three-dimensional porous sponge, and the reactant transfers from bulk solution to catalyst surface by the way of convection and diffusion, which enhances mass transfer and further improves the reaction efficiency. Under the operating conditions of a catalytic bed as small as 3 cm, a 4-NP concentration up to 4.5 mM, and a flow rate of 300 μL min −1 , the conversion rate remained above 96 % for up to 200 h, indicating that the reactor has good catalytic efficiency. The results showed that this continuous flow catalytic system structure has excellent performance in wastewater treatment.
研究领域:
环境科学
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材料科学
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催化化学
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DOI
高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2023
·
IF 2.3
Wei Li,Bei Xi,Jing Ma,XiaoXia Tian,Xu Gao,YanZhong Yang,Liang Xian
Ultrafine Pt nanoparticles (Pt/SWCNTs) supported on single-walled carbon nanotubes (SWCNTs) were prepared by a photochemical method assisted by ethylene glycol (EG) as a reducing agent without the addition of stabilizing agents. the application in the reduction of 4-Nitrophenol (4-NP) was also explored. XRD diffraction patterns show that the content of Pt (111) crystal planes is higher, which is beneficial for improving the catalytic activity of platinum nanoparticles. TEM results showed that Pt/SWCNTs-E3 prepared under Ultra Violet (UV) light irradiation had a small-size particle with an average particle size of about 2.2 nm. XPS results showed that the prepared Pt nanoparticles mainly existed in the form of Pt0. The catalytic performance test results showed that the Pt/SWCNTs prepared under the UV condition of 395 nm had the highest activity for catalyzing the reduction of 4-NP, and the apparent rate constant was k = 0.34 min−1, indicating that it had good catalytic activity. After seven cycles, the conversion rate remains about 83%, which has good reusability and stability. The results show that the aggregation of Pt intermediates can be effectively controlled by photo-induced and strong metal − support interaction (SMSI) to obtain ultrafine nanoparticles dominated by Pt0.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Haixia Zhang,Kaidi Zhao,Jiaping Chen,Renfei Chu,Xinru Xiang,He bian,Chenguang Ding
The polymerizable monomer ETPTA as the inner phase and Tween 80 as the emulsifier to construct O/W emulsions, which could be polymerized to solid polymers by UV-irradiation with the advantages of environmentally friendly and easy preparation. The stirring speed is an important factor affecting the mean size of emulison droplets and solid particles. Increasing the stirring speed is beneficial for the emulsion stabilization due to the small emulison droplets, which can construct smaller solid particles as the carriers of the catalytic active centers. PdNPs as functional metal nanomaterials are selected as the active centers attributed to the peroxidase activity, which can adsorb on the polymer surface (PdNPs@polymer) because of the electrostatic interactions. The analysis of PdNPs@polymer confirm the PdNPs are well-distributed at the polymer surface and have no noticeable aggregation. PdNPs@polymer can reduce 4-NP to 4-AP in the aqueous solution showing remarkable catalytic activity. The carrier polymer particles prepared with the largest stirring speed loaded with PdNPs has the best catalytic activity compared with the low stirring speeds. PdNPs@polymer with higher stirring speed has outstanding catalytic activity due to the numerous emulsion droplets and corresponding solid particles, which are contributed to the loading of PdNPs and improve the catalytic performance. Our findings of the novel catalyst composites are instructive in providing technical guidance for environmental remediation applications with better catalytic activity and being environmentally friendly.
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高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 36
·12599-12606
·
IF 7.059
Qingyan Han,Zhu Lu,Wei Gao,Meng Wu,Yongkai Wang,Zhongyu Wang,Jianxia Qi,Jun Dong
Noble metal nanoparticles (NPs) with unique plasmonic properties are currently the focus for high-performance surface-enhanced Raman scattering (SERS) substrates. However, how to effectively combine metal NPs with two-dimensional materials to further improve SERS detection sensitivity is still a great challenge. Herein, we successfully synthesize AuAg alloy NPs (ANPs) that integrate the desired plasmonic performance of Ag and the good stability of Au. The plasmonic properties of the AuAg ANPs can be easily tuned by changing the molar ratio of Au and Ag. In addition, we also develop a three-dimensional AuAg ANPs/graphene (G)/AuAg ANPs sandwiched hybrid nanostructure (SHNS) substrate by a reproducible interfacial self-assembly technique. The structure consists of two layers of AuAg ANPs film arrays using monolayer graphene as a nanospacer. The SHNS substrate with sub-nanometer gaps exhibits much higher SERS sensitivity and uniformity for the detection of Rh6G molecules, which is mainly due to the high-density “hot spots” in the nanogaps including between AuAg ANPs and AuAg ANPs in the same layer as well as in the monolayer graphene sub-nanospacer, the synergistic effect between Au and Ag species, and the additional chemical enhancement from graphene. The current studied strategy can be exploited for investigating SERS enhancement mechanisms and developing applications of SHNS substrates with graphene in biological sensing, biodetection, and catalysis.
研究领域:
材料科学
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光学
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生物传感
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DOI
高影响因子
CRYSTENGCOMM
·
2017
·Vol. 19
·期 44
·6612-6619
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IF 3.474
Dan Xu,Ying Pan,Liangkui Zhu,Yusran Yusran,Daliang Zhang,Qianrong Fang,Ming Xue,Shilun Qiu
Coordination complexes are ideal sacrificial templates for fabricating their respective derivatives by changing the thermal conditions. In this study, nitrogen-doped hierarchical porous carbons anchored with nickel nanoparticles (Ni NPs) were prepared by using rod-like nickel dimethylglyoximate [Ni(dmg)2] as a sacrificial template under nitrogen flow at different temperatures. The structure, morphology and properties of the products were characterised by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), N2 adsorption–desorption measurements and ultraviolet-visible (UV-vis) spectrophotometry. The optimised Ni@NC-700 sample exhibited an excellent ability to reduce 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by NaBH4 in an aqueous solution, which shortened the reduction time to 3.0 min with a conversion of nearly 100%. In addition, Ni@NC-700 possessed magnetic properties, which provided efficient separation by an external magnetic field. The present report may provide a potential and favourable method for preparing magnetically reusable Ni NP anchored N-doped porous carbon catalysts derived from a simple coordination complex.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
Micro & Nano Letters
·
2019
·Vol. 14
·期 5
·501-504
·
IF 0.975
Ya Liu,Yuqing Miao
The quadrangular (QA) bismuth oxychloride nanoflakes (NFs) were synthesised by a simple solvothermal reaction. They were characterised by scanning electron microscope, transmission electron microscope and X-ray diffractometer. As catalysts, the square NFs exhibited excellent catalytic performance in the reduction of 4-nitrophenol (4-NP) and the degradation of rhodamine B (RhB). The complete reduction of 4-NP to 4-aminophenol was obtained in 30 s and the nearly complete degradation of RhB in 20 min.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Oxidative Medicine and Cellular Longevity
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2021
·
IF 6.543
Bao-Liang Li,Xizhe Liu,Manman Gao,Fu Zhang,Xu Chen,Zhongyuan He,Jianmin Wang,Wei Tian,Dafu Chen,Zhiyu Zhou,Shaoyu Liu
Increasing evidence has indicated that mitochondrial reactive oxygen species (ROS) play critical roles in mechanical stress-induced lumbar degenerative disc disease (DDD). However, the detailed underlying pathological mechanism needs further investigation. In this study, we utilized a one-strike loading disc degeneration organ culture model to explore the responses of intervertebral discs (IVDs) to mechanical stress. IVDs were subjected to a strain of 40% of the disc height for one second and then cultured under physiological loading. Mitoquinone mesylate (MitoQ) or other inhibitors were injected into the IVDs. IVDs subjected to only physiological loading culture were used as controls. Mitochondrial membrane potential was significantly depressed immediately after mechanical stress (). The percentage of ROS-positive cells significantly increased in the first 12 hours after mechanical stress and then declined to a low level by 48 hours. Pretreatment with MitoQ or rotenone significantly decreased the proportion of ROS-positive cells (). Nucleus pulposus (NP) cell viability was sharply reduced at 12 hours after mechanical stress and reached a stable status by 48 hours. While the levels of necroptosis- and apoptosis-related markers were significantly increased at 12 hours after mechanical stress, no significant changes were observed at day 7. Pretreatment with MitoQ increased NP cell viability and alleviated the marker changes by 12 hours after mechanical stress. Elevated mitochondrial ROS levels were also related to extracellular matrix (ECM) degeneration signs, including catabolic marker upregulation, anabolic marker downregulation, increased glycosaminoglycan (GAG) loss, IVD dynamic compressive stiffness reduction, and morphological degradation changes at the early time points after mechanical stress. Pretreatment with MitoQ alleviated some of these degenerative changes by 12 hours after mechanical stress. These changes were eliminated by day 7. Taken together, our findings demonstrate that mitochondrial ROS act as important regulators of programmed NP cell death and ECM degeneration in IVDs at early time points after mechanical stress.
研究领域:
骨科学
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细胞生物学
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生物力学
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DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
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2023
·
IF 6
Xikun Zhang,Xue Lv,Ting Xie,Yanwen Cheng,Jiajia Zhang,Xiaoyan Xu
In catalytic reactions, achieving large specific surface area immobilisation of the catalyst is an important factor affecting the catalytic effect, however, the primary challenges in utilizing hydrogels as catalyst carriers are to enhance the mechanical properties of the hydrogel to improve the activity and controllability of the catalyst. In this study, a new structure of P(AM-co-AA)/SMA/NH 2 -SiO 2 hydrogels was synthesized via free radical polymerization, and the effects of the content of AA and NH 2 -SiO 2 on the mechanical properties of the hydrogels were investigated. Without the use of additional cross-linking agents, both a chemical cross-linking network and a hydrophobic linkage network were established, which effectively reconstructed the structure of the hydrogels and dissipated energy. As a result, P(AM-co-AA-1.5 %)/SMA/NH 2 -SiO 2 -0.5 % hydrogel exhibited high mechanical properties, with tensile strength, elongation, and toughness reaching 1456 KPa, 4605 %, and 23.59 MJ/m 3 , respectively. This hydrogel can be utilized as a template for in situ and stable Ag NPs. Additionally, P(AM-co-AA)/SMA/NH 2 -SiO 2 @Ag composite hydrogels were prepared using cation exchange and in situ reduction methods for the catalytic reduction of 4-nitrophenol (4-NP). The composite hydrogel exhibited fast catalysis, high efficiency, stable cycling, recyclability and adjustable catalytic activity at 35 °C with K app = 0.811 min −1 . Furthermore, using this composite hydrogel alleviated the need for separating metal nanoparticle catalysts from the reaction system, thereby enabling the development of robust hydrogel materials with controlled catalytic activity for the wastewater treatment industry.
研究领域:
材料科学
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环境科学
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催化化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Shukai Zhang,Linghui Cao,Aijuan Xie,Shiping Luo
4-Nitrophenol (4-NP), a hazardous chemical compound, presents significant risks to ecological balance, public well-being, and the integrity of the food supply chain. Consequently, the development of detection techniques characterized by both efficiency and precision is of utmost importance. In the present work, ZnCo(OH)F/multi-walled carbon nanotubes (MWCNTs) composite was synthesized through a hydrothermal approach, followed by a high-temperature annealing process to transform them into ZnCo 2 O 4 /MWCNTs tailored for electrochemical sensing of 4-NP. The integration of MWCNTs during the fabrication process induced a pronounced synergistic interaction between ZnCo 2 O 4 and MWCNTs, leading to a substantial enhancement in the electrochemical performance of the composite. The ZnCo 2 O 4 /MWCNTs-based sensors exhibit notable benefits, including an expanded electrochemically active surface area, superior electrical conductivity, and exceptional selectivity. Under optimized experimental parameters (S/N = 3), the sensor exhibited a broad linear detection range (0.5–600 μM), coupled with a lower limit of detection of 0.026 μM. When used on real samples, the sensor showed recovery rates of 98.79 %–100.47 %, indicating its feasibility for practical use in environmental monitoring and food safety evaluation.
研究领域:
分析化学
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材料科学
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环境科学
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电化学
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食品安全科学
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纳米技术
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DOI
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2026
·
IF 3.4
Menglei Song,Hairui Liu,Wanjiao Wang,Yuting Zhang,Xinjie Shen,Yu Wang,Shengli Han,Langchong He,Lei Shi,Yanyu Bao,Zheng Li,Jiaxin Yin,Heshui Yu
Multi-platform analysis identified 184 compounds in Curcuma wenyujin . • An NP-CMC-HPLC strategy was developed for screening antidepressant candidates. • Six potential antidepressant candidates were identified by multi-target screening. • Dihydrocurcumin and furanodienone were highlighted as neuroprotective candidates. • PRM-based quantification supported activity-associated quality evaluation of WYJ. Depression is a complex disorder involving multiple pathological processes, and the identification of bioactive candidates from traditional Chinese medicine (TCM) remains challenging. This study established an integrated network pharmacology (NP)–cell membrane chromatography (CMC)-high-performance liquid chromatography (HPLC) strategy (NP-CMC-HPLC) for activity-guided screening of potential bioactive compounds and activity-associated quality characterization of the dried tuberous root of Curcuma wenyujin Y. H. Chen & C. Ling (WYJ). The chemical profile of WYJ was comprehensively characterized using ultra-performance liquid chromatography coupled with quadrupole Orbitrap mass spectrometry (UPLC-Q-Orbitrap-MS), combined with headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME-GC-MS) and headspace gas chromatography-ion mobility spectrometry (HS-GC-IMS). A total of 184 compounds were identified, and potential bioactive compounds were prioritized through network pharmacology analysis. Multi-target cell membrane chromatography (CMC) systems based on 5-hydroxytryptamine 1 A receptor (5-HT 1A ), 5-hydroxytryptamine 2 A receptor (5-HT 2A ), dopamine D1 receptor (DRD1), dopamine D2 receptor (DRD2), and monoamine oxidase A (MAO-A) were subsequently established, enabling the identification of six compounds exhibiting target-associated retention behavior. Molecular docking and a corticosterone-induced PC12 cell injury model provided complementary computational and cellular evidence supporting compound selection. Finally, a parallel reaction monitoring (PRM)-based method was developed for the quantitative analysis of four non-volatile CMC-prioritized compounds. The proposed strategy integrates chemical profiling, target affinity screening, cellular evaluation, and quantitative analysis to facilitate the discovery of bioactive candidates and activity-associated quality characterization of complex herbal medicines. Download: Download high-res image (252KB) Download: Download full-size image
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高影响因子
Materials
·
2025
·Vol. 18
·期 5
·930
·
IF 3.2
Jiatao Xie,Shengkang Hu,Mengyuan Wei,Shenghui Xie
Fe-based metallic glass (MG) exhibits excellent performance as a heterogeneous catalyst in degradation but is rarely used as a working electrode in electro-Fenton (EF) systems. We used Fe78Si9B13MG as the working electrode to investigate the effect of the EF process on the degradation efficiency of p-nitrophenol (p-NP). The EF system had the highest catalytic efficiency (the reaction rate was 3.4 times that of chemical degradation) at a voltage of −1 V (vs. SCE) and showed 95.6% degradation of p-NP within 30 min. The electrode voltage accelerated the generation of hydroxyl radicals (·OH) in the system, thus promoting pollutant degradation. In addition, the Fe78Si9B13MG cathode demonstrated good structural stability and reusability after 10 cycles. Fe78Si9B13MG ribbons can serve as a suitable cathode material and provide potential optimization solutions for the degradation of organic pollutants.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Songhao Luo,Zhigang Yi,Min Cheng,Biao Song,Chengyun Zhou,Wenjun Wang,Zhifeng Liu
It is challenging to produce soft polymer materials with high surface area and nanoscale morphology that can be used for continuous flow water treatment in a processable, versatile, and stable manner. Here, we manufactured a processable Ag@CMPA-bph and used it to treat pollutants in wastewater at continuous flow conditions. The aerogel was prepared by a simple reduction method of CMP matrix and Ag metal precursors. Thermogravimetric analysis and electron microscopy showed that the aerogel had excellent thermal stability and distribution of fine Ag nanoparticles. The synthesized aerogel inherits the controllable properties of the CMP matrix and can be tailored to a specific shape for installation into the water treatment unit. In continuous flow conditions, this aerogel shows excellent catalytic activity to efficiently treat the combined pollutant containing p- nitrophenol and methyl orange ( p- NP&MO), which can reach a removal rate of more than 99 % at the flow rate of 0.6 L h -1 . Furthermore, the Ag@CMPA-bph can also be used for continuous flow treatment of pollutants in river water sample and shows robust anti-pollution load capacity and catalytic activity.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
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