Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yuanliang Gu,Zinan Zhang,Shengshen Gu,Qi Zhang,Meng Guo,Yang Pan,Genghao Gong,Zhaoliang Cui,Xiuxiu Ren,Jing Zhong
1,2-bis(triethoxysilyl)ethane (BTESE)-derived organosilica membranes have good acid-resistant stability in the application of acetic acid dehydration via pervaporation technology. To enhance the separation performance of water (0.26 nm) and acetic acid (0.43 nm), graphitic carbon nitride (g-C 3 N 4 ) distinguished by its periodic nanoporosity (0.31-0.34 nm) and hydrophilic functionality, offers exceptional potential for organosilica-based membranes improvement. Herein, we tailored g-C 3 N 4 nanostructures as 2D nanosheets (4 nm thickness) and 0D quantum dots (4 nm diameter), and embedded them into BTESE membranes. For their thermal stability, the nanosheets enhanced structural integrity due to interlayer covalent/hydrogen bonding networks, while quantum dots exhibited a larger weight loss but preserved more residues at 800 o C. Nanosheets incorporated BTESE/g-C 3 N 4 composites reduced BTESE pore size, amplified surface hydrophilicity and membrane thickness, whereas quantum dots with abundant functional groups minimally altered BTESE matrix structures. In pervaporation of acetic acid/water, BTESE performance was improved by both morphologies of g-C 3 N 4 fillers at the same optimal loading. The nanosheet-incorporated membrane (BTESE/CN-NSs-3) achieved a separation factor of 2327 with a flux of 2.35 kg/m 2 ·h, while quantum dots-incorporated membrane (BTESE/CN-QDs-3) exhibited a higher flux of 2.52 kg/m 2 ·h but a lower separation factor of 1352. In feed concentration (50–90 wt% AcOH) and temperature dependent (55–95 °C) operations, nanosheets facilitated molecule sieving through interlayer channels, whereas quantum dots enabled lower-resistance pathways by diffusivity dominated permeation. This work establishes g-C 3 N 4 dimensionality modulating organosilica membrane’s transport hierarchy, providing a selection for developing acid-resistant membranes in improving flux and separation factor.
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Xiaoli Yi,Hongyue Luo,Yongmao Zhou,Shihao Feng,Jiexi Wang,Zhixing Wang,Jianguo Duan,Ding Wang,Huajun Guo,Guochun Yan
Na 3 V 2 (PO 4 ) 2 F 3 is considered as one of the most promising cathode materials for sodium-ion batteries (SIBs). However, the low electronic conductivity of this material severely restricts its electrochemical performance. Herein, Cr-doped Na 3 V 2 (PO 4 ) 2 F 3 /C material was synthesized by a simple sol-gel method, and the effects of Cr 3+ doping on the structure, morphology and electrochemical performance were systematically investigated. The optimized material Na 3 V 2-x Cr x (PO 4 ) 2 F 3 /C (x = 0.05) exhibits high initial discharge capacity of 101.9 mAh g −1 at 10 C and keep a capacity retention of 68.7 % after 1000 cycles. The improved electrochemical performance can be attributed to the higher crystallinity, improved intrinsic electronic conductivity and sodium ion diffusion coefficient due to the doped Cr 3+ , which accelerates the electron transport and charge transfer rate. The optimized Cr-doped Na 3 V 2 (PO 4 ) 3 F 3 /C material obtained in this work can promote the practical application of Na 3 V 2 (PO 4 ) 3 F 3 cathode.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
Small
·
2022
·Vol. 18
·期 45
·2204446
·
IF 15.153
Hui Shu,Changtao Peng,Qian Chen,Zhangfeng Huang,Chen Deng,Wenjie Luo,Haijin Li,Wenfeng Zhang,Wenhua Zhang,Yuelong Huang
Combining two kinds of electron transport layer (ETL) which have complementary advantages into a bilayer structure to form a bilayer ETL is an effective way to transcend inherent limitations of single-layer ETL, which is very helpful in the development of perovskite solar cells (PSCs). In this work, a strategy is proposed to break constraints on the application of the staggered bilayer ETL in high-efficiency PSC, namely utilizing a built-in field to overcome the dilemma in E CBM making it possible to improve V OC and FF simultaneously by tuning the Fermi level of ETLs properly. According to the strategy, a bilayer ETL structure comprised of C-TiO 2 and SnO 2 layer and corresponding Li-doping process are developed, and the characterization results confirm the effectiveness of the strategy, making the potentials of the C-TiO 2 (Li)/SnO 2 bilayer ETL fully released for its application in high-efficiency PSCs: a V OC of 1.201 V for an ordinary triple-cation-perovskite-based PSC and a photoelectric conversion efficiency of 24.3% for a low-bandgap-perovskite-based PSC with high haze FTO superstrate are successfully achieved, indicating that the C-TiO 2 (Li)/SnO 2 bilayer ETL is a successful application paradigm of the proposed strategy and very promising in the application of high-efficiency PSCs.
研究领域:
材料科学
·
能源科学
·
光伏技术
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Shuhong Huang,Yan Wang,Shuying Qiu,Jinquan Wan,Yongwen Ma,Zhicheng Yan,Quanmo Xie
Since high degradation efficiency and environmental friendliness, the Electro-Fenton technology has been widely applied to remove antibiotics in wastewater. In-situ loading of electrochemically active metals on graphite felt (GF) is considered as a promising strategy for improving its electrocatalytic activity and reusability. Here, a series of Mn/Co MOFs derivatives modified graphite felt cathodes (Mn x Co 3-x @C-GF) were fabricated without any binder, which was used for the treatment of ciprofloxacin (CIP). The morphology, pore structure and electrochemical activity of Mn x Co 3-x @C-GF changed by adjusting the ratio of Mn/Co in the MOF-74 precursor. Owning to the optimized Mn/Co ratio, Mn 2 Co 1 @C-GF exhibited the most excellent catalytic ability with hierarchical porous structure and faster electron transfer . The results showed that the CIP degradation efficiency could reach 99.8% in 60 min. Mn 2+/3+/4+ and Co 3+/2+ enhanced the generation of active radicals (·OH) by Fenton-like reaction and further improved degradation performance. In addition, the cathode had maintained good stability during four cycles. This work provides an alternative strategy for fabricating efficient self-supporting cathode materials in the future.
研究领域:
环境科学
·
化学工程
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材料科学
·
水处理
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DOI
高影响因子
IONICS
·
2019
·Vol. 26
·期 2
·649-660
·
IF 2.289
Yan Honglin,Ru Qiang,Gao Ping,Cheng Shikun,Ling Francis Chi-Chung
In the past few years, silane coupling agents are often used to modify the surface of silicon materials; however, researches in preparation of SiO X -based materials pyrolyzed from silane coupling agents are seldom reported. Hence, in order to prepare amorphous SiO X @C anodes for Li-ion storage, we adopted three kinds of silane coupling agents as organic silicon sources. The results show that silane coupling agents with vinyl group is the optimum organic silicon source. Owing to the strong chemical bonds of Si–O–C, amorphous SiO X particles are uniformly embedded in carbon matrix, forming monodisperse microbeads architecture with good buffer abilities. Therefore, the V-SiO X @C anodes derived from silane coupling agents with vinyl groups show good electrochemical performance, retaining a reversible discharge capacity of 940 mAh g −1 at a current density of 100 mA g −1 after 200 cycles, and it still depicts a good long-term cycling durability, maintaining 739 mAh g −1 at a current density of 400 mA g −1 after 400 cycles.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
·
锂离子电池
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 108
·期 1
·e20151
·
IF 3.5
Zhitong Xu,Jian Zhao,Malin Liu,Zebing Liu,Xinyu Cheng,Jiaxing Chang,Xu Yang,Bowen Li,Bing Liu,Rongzheng Liu
Developing high strength and tough silicon carbide (SiC) composite ceramics remains a significant challenge. Here, we report the process of synthesizing fully densified SiC/C composite ceramics using SiC@graphene (SiC@G) core–shell nanoparticles as raw materials through spark plasma sintering (SPS) at 1700°C and 45 MPa. The SiC@G nanoparticles were synthesized by the fluidized bed chemical vapor deposition (FB-CVD) method. During the sintering process, graphene coated, the surface of nanosized SiC particles exhibited high electrical and thermal conductivity, facilitating the uniform distribution of pulse current and heat and promoting the densification of SiC/C composite ceramics. For the prepared SiC/C composite ceramic, the carbon content reaches as high as 14.3 wt%, with carbon uniformly dispersed in a particulate form within the SiC matrix and stable interface bonding. Consequently, the introduction of excessive carbon does not compromise the hardness (28.8 GPa) and flexural strength (517.34 MPa) of the SiC/C composite ceramics. Furthermore, the carbon particles effectively enhance the toughness of the SiC/C composite material through mechanisms such as crack branching, bridging, and deflection, resulting in a fracture toughness of 7.38 MPa m 1/2 . The preparation strategy in this study provides a novel route for sintering SiC composites with high-carbon content through nanoscale powder structure design, resulting in the attainment of high-performance lightweight composite materials.
研究领域:
材料科学
·
复合材料
·
纳米技术
·
陶瓷
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DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Hao Gu,Yi Jiang,Xijia Yang,Yue Yang,Xuesong Li,Liying Wang,Wei Lü
Flexible and wearable pressure sensors have attracted significant attention due to their wide range of potential applications. However, they often suffer from low sensitivity, narrow pressure detection range, and poor mechanical flexibility. In this work, a multifunctional 3D pressure sensor based on a ternary metal oxide@carbon-based sponge (C–NiCoZn–O/CMF) was developed by the hydrothermal method. The pressure feedback layer of the sensor was uniformly coated with C–NiCoZn–O on the surface of the framework, which improved the device’s conductivity, sensitivity, and stability significantly. The sensitivities of 41.99, 23.39, and 11.19 kPa–1 are in the ranges 0–4.01, 4.01–8.39, and 8.39–20.1 kPa, respectively, and the cyclic retention rate exceeded 90% after 2000 cycles. The C–NiCoZn–O/CMF composite demonstrated excellent electrochemical performance as an electrode for supercapacitors, with a high specific capacity of 2030 mF/cm2 at a current density of 1 mA/cm2 and a high capacity retention rate of 81.55% after 4000 cycles. As a multifunctional device, when integrated with a microprocessor, it can easily detect and process a large amount of human physiological signal data in daily work scenarios. Present composites maintain adjustable conductivity and extremely high elasticity even under extreme conditions such as liquid nitrogen and high temperatures up to 85.6 °C. This work is expected to play a great role in polar exploration, volcano survey, deep space exploration, etc.
研究领域:
材料科学
·
传感器
·
纳米技术
·
电化学
·
柔性电子学
·
可穿戴设备
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yang Wang,Lei Zhang
In order to eliminate multiple coexisting pollutants in environmental wastewater, a magnetic three-dimensional hierarchical porous flower-like N, Co-doped graphitic carbon nano-polyhedra decorated NiCo-layered double oxides (N-Co@C/NiCo-LDOs) adsorption material was synthesized, which consisted of two-dimensional LDOs nanosheets with functionalized surfaces (N, Co-doped graphitic carbon loaded on both sides of NiCo-LDOs nanosheets). The adsorption properties of N-Co@C/NiCo-LDOs for five types of typical pollutants (cationic dyes: rhodamine b, methylene blue ; pesticides: ethofenprox, bifenthrin ; anionic dyes: methyl orange, congo red; inorganic cations : Cr 2+ , Cd 2+ , Pb 2+ , Zn 2+ , inorganic anions : Cr 2 O 7 2− , AsO 3 3− ) were investigated systematically in single and coexisting systems. Combined with the results of FTIR and zeta potential , the adsorption mechanism was discussed. By virtue of its hierarchical porous architecture and the combined effect of functionalized surfaces and LODs supporter, the as-prepared N-Co@C/NiCo-LDOs demonstrates excellent adsorption performance towards five types of typical pollutants with fast adsorption rate, high adsorption capacity and good co-adsorption performance. More importantly, the N-Co@C/NiCo-LDOs showed satisfactory removal efficiency, stability and reusability in model wastewater. The broad-spectrum, rapid, easily separable, and reusable adsorption properties make N-Co@C/NiCo-LDOs promising for highly efficient wastewater treatments . This work also provides a feasible way for the preparation of adsorption materials for the treatment of complex wastewater systems.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Huijie Wang,Hongzhao Chen,Qingqiao Wan,Yuzhao Zheng,Yang Wan,Xin Liu,Xianghai Song,Wei Ma,Pengwei Huo
In this work, a Co-N/C@CeO 2 composite material was successfully synthesized via hydrothermal, in-situ growth, calcination methods and applied in a thermal-assisted activation peroxymonosulfate (PMS) system for efficient degradation of polyethylene terephthalate microplastics (PET MPs). The effects of various parameters, including catalysts, reaction temperature, H 2 O 2 , PMS dosages and catalyst loading, on the degradation efficiency of PET MPs were systematically investigated. Characterization techniques, including mass spectral (MS) analysis, in-situ Fourier transform infrared (in-situ FT-IR) and electron paramagnetic resonance (ESR), revealed that PET MPs adsorbed on the surface were rapidly degraded under the action of hydroxyl radical (•OH) and sulfate radical (SO 4 •− ). In the presence of a small amount of H 2 O 2 and the synergistic effect, the Co-N/C@CeO 2 composite material successfully achieved a 92.3% degradation rate of PET MPs in the thermal-assisted activation PMS system. DFT calculations indicated that the Co-N/C@CeO 2 composite material exhibited relatively lower adsorption energy and higher activation capacity for HSO 5 − molecules. In addition, toxicity assessment results showed that the degradation intermediates had generally lower toxicity. This study not only provides valuable insights for the construction of high-activity Co-N/C and CeO 2 composite materials but offers technical and theoretical guidance for the effective degradation of PET MPs in the environment.
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
BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Junchun Wang,Jinjin Guo,Junjun Zhang,Wenjuan Zhang,Yuzhong Zhang
C-reactive protein (CRP) is a widely accepted biomarker of cardiovascular disease and inflammation. In this study, a RNA aptamer-based electrochemical sandwich type aptasensor for CRP detection was described using the functionalized silica microspheres as immunoprobes. Silica microspheres (Si MSs), which have good monodispersity and uniform shape, were firstly synthesized. The silica microspheres functionlized with gold nanoparticles (Au NPs) provided large surface area for immobilizing signal molecules (Zinc ions, Zn 2+ ) and antibodies (Ab). RNA aptamers, which were specific recognized to CRP, were assembled on the surface of Au NPs modified electrode via gold-sulfur affinity. In the presence of CRP, a sandwich structure of aptamer-CRP-immunoprobe was formed. Square wave voltammetry (SWV) was employed to record the sensing signal, and a clearly reductive peak corresponding to Zn 2+ at about −1.16 V (vs. SCE) was obtained. Under optimal conditions, the aptasensor showed wide linear range (0.005 ng mL −1 to 125 ng mL −1 ) and low detection limit (0.0017 ng mL −1 at a signal-to-noise ratio of 3). Some possible interfering substance was also investigated, and the results obtained showed that the aptasensor possessed good selectivity . When the aptasensor was applied to real serum samples analysis, the satisfied results were obtained, indicating that the aptasensor possessed potential real application ability.
研究领域:
生物传感器
·
电化学
·
分析化学
·
生物工程
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DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Guohua Qi,Haijuan Li,Ying Zhang,Chuanping Li,Shuping Xu,Minmin Wang,Yongdong Jin
Cytochrome c (Cyt c) release and cellular pH change are two important mediators of apoptosis. Effective methods to regulate or monitor such two events are therefore highly desired for apoptosis research and cancer cell therapy. Herein, we exploited electrostimulation to regulate cellular Cyt c release and apoptosis process, and by designing and preparing a smart and efficient plasmonic nanorobot (with surface-modified Cyt c-specific aptamer and 4-mercaptobenzoic acid) that is capable of Cyt c capture and self-sensing, we achieved real-time SERS monitoring of dynamic Cyt c release and simultaneous cell acidification in apoptosis during electrostimulation. Distinctly different molecular stress responses in the two events for cancerous MCF-7 and HeLa cells and normal L929 cells were identified and revealed. The method and results are valuable and promising for apoptosis and Cyt c-mediated biology studies.
研究领域:
生物医学工程
·
纳米技术
·
癌症研究
·
细胞生物学
·
分析化学
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DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 35
·29638-29645
·
IF 3.289
Xin Ge,Xinzhi Chen,Chao Qian,Shaodong Zhou
Ullmann type C–N coupling reaction catalyzed by copper(I) with D-glucosamine derivatives as promoters was studied by means of combined experimental/theoretical investigation. The catalytic role of D-glucosamine was addressed. In contrast with previous speculations, the amino group may not count in the catalytic cycle in which the oxidative addition/reductive elimination mechanism works. Experimental results are in good agreement with theoretical findings. Extensive work indicates the wide applicability of the C–N coupling strategy exploited in this work.
研究领域:
有机化学
·
催化化学
·
药物化学
·
计算化学
·
合成方法学
·
生物正交化学
·
金属有机化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）