MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 9
·1-16
·
IF 5.3
Meng Jingjing,Han Lu,Li Lu,Yin Xue-bo,Zheng Jing
Manganese dioxide (MnO 2 )-based heterogeneous catalysts have gained significant attention in nanozyme research due to their exceptional oxidase-mimicking capabilities. This work reports the rational design of MnO 2 functionalized magnetic carbon nanotubes (Fe 3 O 4 @C@MnO 2 ) through a multistep synthesis strategy. The magnetic N-doped hollow carbon substrate (Fe 3 O 4 @C) was first synthesized via controlled pyrolysis of FeOOH-coated polydopamine precursors. Subsequent interfacial redox reaction with KMnO 4 enabled the in situ deposition of ultrathin MnO 2 nanosheets on the nanotube substrate, forming a triple-component coaxial architecture. This hollow structure not only facilitates dense MnO 2 deposition but also maintains robust magnetic responsiveness. The obtained Fe 3 O 4 @C@MnO 2 exhibits remarkable enzyme-mimetic capability, catalyzing TMB chromogenic conversion with 0.92-fold enhanced catalytic performance relative to pristine MnO 2 . Systematic mechanistic studies reveal that tannic acid (TA) competitively inhibits ·OH radical generation via MnO 2 -TA complexation, while the carbon interlayer enhances electron transfer efficiency. Owing to the superior enzyme-mimetic performance of Fe 3 O 4 @C@MnO 2 and their inhibition effect by TA, a sensitive colorimetric biosensing assay was fabricated, achieving a TA detection limit of 0.029 μM with a 0.096–4.82 μM linear concentration range. This work exemplifies the synergy of structural engineering and component optimization in designing multifunctional nanozymes, showing potential applications in food quality monitoring, environmental analysis, and point-of-care diagnostics. Graphical
研究领域:
纳米酶技术
·
纳米材料合成
·
生物传感器
·
环境分析
·
食品安全监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2014
·Vol. 2014
·期 20
·3172-3177
·
IF 2.965
Zhiming Chen,Zhirong Geng,Zhiyang Zhang,Lianbing Ren,Tingxian Tao,Renchun Yang,Zuxiang Guo
Graphical Core–shell magnetic Fe 3 O 4 @C nanoparticles are functionalized with sulfonic and carboxylic acid groups and employed to capture heavy metal ions in aqueous media. The magnetic Fe 3 O 4 @C nanoparticles can be easily separated with an external magnet and possess rapid removal kinetics, high adsorption capacities, and removal efficiencies for Pb 2+ , Hg 2+ , and Cd 2+ ions from aqueous solution. Core–shell magnetic Fe 3 O 4 @C nanoparticles functionalized with sulfonic and carboxylic acid groups were synthesized and employed to capture heavy metal ions in aqueous media. The Fe 3 O 4 cores possess unique magnetic properties for adsorbent separation, and the –SO 3 H and –COOH groups attached to the surface of the carbon shells determine the efficiency of heavy metal ion removal. Batch adsorption experiments showed that Pb 2+ , Hg 2+ , and Cd 2+ ions can be completely and quickly removed by the Fe 3 O 4 @C nanoparticles. The equilibrium was established within 5 min, and the maximum adsorption capacities of the Fe 3 O 4 @C nanoparticles toward Pb 2+ , Hg 2+ , and Cd 2+ ions were 90.7, 83.1, and 39.7 mg/g, respectively. The removal efficiencies were 96.3, 98.1, and 93.8 % for Pb 2+ , Hg 2+ , and Cd 2+ ions, respectively. This work provides a facile and general approach to synthesize magnetic functional nanocomposites for wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Frontiers of Materials Science
·
2021
·Vol. 15
·期 2
·241-252
·
IF 2.765
Du Yan,Niu Ziwen,Yan Tingjiang,Zhu Kunlei,Yu Yang,Jing Zhihong
Carbon-molybdenum disulfide (C-MoS 2 ) ultrathin nanosheets were prepared by a hydrothermal process, and then AgI/C-MoS 2 were synthesized via an in-situ deposition method. This ternary heterojunction composite exhibited better photocatalytic activity compared with those of one-component (pristine MoS 2 ) and bicomponent (AgI/MoS 2 and C-MoS 2 ) materials for the degradation of organic dyes under the visible-light irradiation. In particular, by comparing with AgI/MoS 2 , the significant role of conductive amorphous carbon in AgI/C-MoS 2 in enhancing the charge transfer during the photocatalytic degradation of dyes was first confirmed by photocurrent response and electrochemical impedance spectroscopy (EIS). A possible photocatalytic mechanism was proposed based on the capture experiment results. Furthermore, a straightforward and interesting way had been applied to test the recycled/newly-prepared AgI/C-MoS 2 composite for revealing its distinctive self-cleaning performance and recyclability characteristic besides its good photocatalytic activity. This work could provide a reference for the design of other new ternary heterojunction composite materials with special structures and properties.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 7
·4720-4727
·
IF 1.354
Chen Li-Li,Shen Xiang-Qian,Jing Mao-Xiang,Zhu Sheng-Wen,Pi Zhi-Chao,Li Jing-Quan,Zhai Hong-Ai,Xiao Ke-Song
A LiFePO4/C composite fiber membrane was fabricated by the electrospinning method and subsequent thermal treatment. The thermal decomposition process was analyzed by TG/DSC, the morphology, microstructure and composition were studied using SEM, TEM, XRD, Raman, respectively.
The results indicated that the prepared LiFePO4/C composite fibers were composed of nanosized LiFePO4 crystals and amorphous carbon coatings, which formed a three dimensional (3D) long-range networks, greatly enhanced the electronic conductivity of LiFePO4
electrode up to 3.59× 10−2 S · cm−2. The 3D LiFePO4/C fiber membrane could be directly used as a binder-free, self-standing cathode for lithium-ion battery, and exhibited an improved capacity and rate performance. The LiFePO4/C
composite electrode delivered a discharge capacity of 116 mAh·g−1, 109 mAh·g−1, 103 mAh·g−1, 91 mAh·g−1, 80 mAh·g−1 at 0.1 C, 0.5 C, 1 C, 3 C, 5 C, respectively. And a stable
cycling performance was also achieved that the specific capacity could retain 75 mA·g−1 after 500 cycles at 5 C. Therefore, this LiFePO4/C composite fiber membrane was promising to be used as a cathode for power lithium ion battery.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2013
·
IF 4.612
Changzeng Wu,Jianji Wang,Zhiyong Li,Jun Jing,Huiyong Wang
In this work, glycine ionic liquids tetramethylammonium glycine ([N 1111 ][Gly]), tetraethylammonium glycine ([N 2222 ][Gly]), tetra-n-butylammonium glycine ([N 4444 ][Gly]), tetra-n-butylphosphonium glycine ([P 4444 ][Gly]) and tetra-n-pentylammonium glycine ([N 5555 ][Gly]) were synthesized and used to prepare aqueous two-phase systems (ATPSs) in the presence of K 2 HPO 4 . Binodal curves of such ATPSs and partition coefficients of a series of dinitrophenylated (DNP) amino acids in these ATPSs were determined at 298.15 K to understand the effect of cationic structure of the ionic liquids on the phase-forming ability of glycine ionic liquids, relative hydrophobicity between the phases in the ionic liquids ATPSs, and polarity of the ionic liquids-rich phases. With the attempt to correlate the relative hydrophobicity of the phases in the ATPSs with their extraction capability for proteins, partition coefficients of cytochrome-c in the ATPSs were also determined. It was shown that partition coefficients of cytochrome-c were in the range from 2.83 to 20.7 under the studied pH conditions. Then, hydrophobic interactions between cytochrome-c and the ionic liquid are suggested to be the main driving force for the preferential partition of cytochrome-c in the glycine ionic liquid-rich phases of the ATPSs. Result derived from polarity of the ionic liquids-rich phases supports this mechanism.
研究领域:
生物化学
·
分离科学
✓ 已验证
DOI
高影响因子
ELECTROANALYSIS
·
2023
·Vol. 36
·期 4
·e202300371
·
IF 3
Wenjing Liu,Sumin Xu,Jinjin Zhang,Qi Wang,Jianying Qu
In this work, manganese-based metal-organic frameworks (MnBDC) were synthesized by solvothermal method and physically mixed with pre-prepared graphene oxide (GO) to obtain GO/MnBDC, which were calcined to give MnO@C composite coated with reduced graphene oxide (rGO) marked as rGO/MnO@C. The materials were characterized by SEM, XRD, FTIR and XPS. Based on this composite, a novel sensor was constructed on a glassy carbon substrate, which exhibited good electrocatalytic activities to the redox reactions of catechol (CC) and hydroquinone (HQ), enabling simultaneous detection of both analytes. Under optimized conditions, the electrochemical sensor demonstrated a linear range of 0.50–90.00 μM for both CC and HQ detection, with respective detection limits of 0.05 μM and 0.03 μM. Moreover, the sensor exhibited excellent sensitivity, selectivity and accuracy for detecting CC and HQ simultaneous in real samples.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
Food Bioscience
·
2025
·
IF 5.9
Lingling Bai,Yurui Wu,Huijin Xu,Jiyuan Yang,Yiting Lu,Wenge Yang,Yonghong Hu
In this study, K-carrageenan (KC)/poly(lactic acid) (PLA) composite nanofiber membranes loaded with vitamin C (VC)/2-hydroxypropyl-β-cyclodextrin (HP-β-CD) inclusion complexes were prepared by electrostatic spinning for blueberry preservation. A scanning electron microscope, electronic universal testing machine, and other instruments were used to analyze the apparent and mechanical properties of the membrane as well as the physicochemical indexes of blueberries during the preservation process. The loading of the inclusion raised the average diameter of the nanofibers membrane, reduced the crystallinity, and hydrophobicity, and improved the thermal stability of the fibers membrane. The release curves showed that encapsulating the inclusion complex in KC/PLA significantly prolonged the release time of VC. The membranes exhibited better antimicrobial properties as well as higher antioxidant properties in vitro and in vivo . These results indicate that the developed antimicrobial membrane has good application prospects in food packaging.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2025
·
IF 3.6
Jiaxuan Dong,Yifan Lv,Yiyang Li,Kexin Xu,Xinrui Cui,Cun-Yue Guo,Baolin Li
Thienoacenes are a prominent class of fused-ring conjugated organic compounds and have attracted considerable attention due to their high coplanarity, good stability, high charge-carrier mobility, etc. However, most current synthetic methods toward thienoacenes require costly starting materials and reagents, as well as a lengthy synthetic procedure with low overall yields. Herein, a nonprecious copper-catalyzed system without additional ligands was developed to facilitate C–S coupling and 5-endo-dig thienannulation reaction, leading to the synthesis of a range of thienoacenes including dithieno[3,2-b:2′,3′-d]thiophenes (DTTs) and thieno[2′,3′:4,5]thieno[3,2-b]thiophene[2,3-d]thiophene (TTAs) with yields of up to 90% (for single-sided thienannulation reactions) and 65% (for double-sided thienannulation reactions). In addition, three π-extended DTTs were studied as potential thermoelectric materials, and their composites with single-walled carbon nanotubes (SWCNTs) exhibited high thermoelectric performance with the power factor up to 399.01 ± 16.26 μW m–1 K–2 at room temperature, which is the highest reported for thermoelectric composites comprising small-molecule thiophene derivatives and SWCNTs, signifying a step forward in the development of high-performance thermoelectric composites based on thiophene derivatives.
研究领域:
有机化学
·
材料科学
·
热电研究
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Qinghua Tian,Lingxiangyu Li,Li Yang,Jizhang Chen,Shin-ichi Hirano
With a much higher theoretical capacity than that of graphite anodes, SnO 2 has attained great attention as a potential anode material for next-generation lithium-ion batteries. However, it's practical application yet be impeded by such disadvantages of poor conductivity and terrible structure stability during repeated discharge/charge process. Herein, a unique TiO 2 /SnO 2 /C hybrid (TiO 2 SS@SnO 2 @C) consist of one-dimensional TiO 2 nanobelts , zero-dimensional SnO 2 nanoparticles and conformal carbon coating has been fabricated based on a strategy of synergistic effect of components with different dimensional nanostructures , which can provide improved electrochemical kinetic and outstanding structure stability for the TiO 2 SS@SnO 2 @C. As a result, the TiO 2 SS@SnO 2 @C is able to exhibit outstanding lithium storage performance as an anode material, delivering capacities of 904.9 and 492.4 mAhh g −1 after even 400 cycles at 200 and even 1000 mA g −1 , respectively. It is demonstrated that the synergistic effect of these components is responsible for thus outstanding electrochemical performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Ruixue Shi,Tianbao Liu,Jing Lu,Xiangjing Liang,Andrei Ivanets,Junqin Yao,Xintai Su
Biochar derived from municipal sludge can be applied to adsorption. But it usually requires activation and pickling due to the generation of impurities such as metal oxide particles, which is uneconomical. Here, a facile strategy, acidification-one-step calcination, was developed and sludge-based Fe–C materials with good Cr(VI) removal effect were obtained by regulating the amount of hydrochloric acid . The results show that the adsorption capacity of Fe/C-5 (the best sample) for Cr(VI) was 150.84 mg g −1 . According to the Langmuir isotherm and pseudo-second-order kinetic model, the removal of Cr(VI) by Fe/C-5 is spontaneous and endothermic chemisorption process. In addition, Fe/C-5 has good ability to remove Cr(VI) under the interference of coexisting ions, and has good cycle stability. The removal of Cr(VI) by Fe/C-5 is considered to be synergistic process of adsorption and reduction. The Fe atoms were highly dispersed in Fe/C-5 and tightly bonded with C atoms, which not only strengthened the Cr(VI) adsorption by electrostatic attraction, but also activated the C atoms in the biochar material, so that the C atoms can reduce Cr(VI) to Cr(III) under acidic conditions. This may be due to the fact that acid pretreatment converted the iron in municipal sludge in the form of Fe–O/OH to free Fe 3+ and entered the C lattice during the calcination process. In this work, Fe–C materials with excellent Cr(VI) adsorption capacity were prepared by one-step calcination method, which has important reference significance for the resource utilization of municipal sludge.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 51
·2208676
·
IF 19.924
Bo Pang,Zuquan Jin,Yunsheng Zhang,Zhiyong Liu,Wei She,Penggang Wang,Yong Yu,Xiaoying Zhang,Chuansheng Xiong,Ning Li,Guowen Sun,Peng Zhao,Guojian Liu,Xiaoyun Song,Song Gao
Cement-based sensors (CBSs) have demonstrated potential in structural health monitoring (SHM) despite rare applications due to their poor flexibility and sensing accuracy/protection with robustness. Herein, a promising strategy is reported to design a waterborne epoxy resin (WEP)-modified cement-based composite coating sensorcapable of simultaneous stable SHM and durable protection. The interpenetrating network (IPN) formed by WEP within cement paste is bionic to the toughness and crack resistance of biological muscle tissue and balances the ion permeation performance and polarization of hydration products. The polymerization-redispersion progress and mechanism of calcium silicate hydrate (C-S-H) gel modified with [3-(2-aminoethylamino)-propyl]trimethoxysilane silsesquioxane (C-POSS) are characterized and revealed. The results show that the muscle-like IPN increases the cement-based coatings’ maximum deflection angle to 30° and improves the monitoring accuracy of compressive, tensile, and fatigue microchanges of concrete structures to more than 95%. The POSS···Ca 2+ ···C-S-H interaction in C-POSS partially transferred the intra-adhesive hydrogen bonds surrounding the nanoconducer into electrostatic bridging ones to maintain an excellent electromechanical conductive dispersion.
研究领域:
土木工程
·
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 9
·1-14
·
IF 2.4
Jiang Wenjia,Zhang Pingzhu,Jia Qingqing,Zhang Zhongao,Liu Yaming,Hu Shilin,Ruan Hao,Huang Li,Wu Dong,Zhao Zhi
Hydrophobic catalysts are essential for water-hydrogen exchange reactions to facilitate the separation of hydrogen isotopes. However, existing hydrophobic catalysts are primarily small-sized pelleted forms, which are not suitable for large-scale systems. In contrast, structured catalysts, which offer a low pressure drop and enhanced mass and heat transfer properties, present promising applications. In this work, cake-like nickel foam (NF) was selected as the structural support. Activated carbon was initially loaded onto the NF using silica sol, followed by hydrothermal deposition of NiCo 2 O 4 with a rough morphology, resulting in a carrier with high roughness and a large specific surface area. The carrier attained a superhydrophobic state after modification with heptadecafluorodecyltrimethoxysilane (FD-TMS), achieving a contact angle of 163.8°. The Pt/NiCo 2 O 4 /C/NF superhydrophobic catalyst was subsequently prepared by loading Pt particles via an impregnation-gas phase reduction method. This method exposes the active metal on the surface, enhancing the Pt utilization rate. Furthermore, the extensive surface area of the carrier provided numerous attachment sites for Pt, leading to smaller particle sizes and greater exposure of Pt precursors for reduction to zero-valent Pt. The results indicated that the Pt particle size in the catalyst was 2.31 nm, with 73% of the Pt in the zero-valent form. In water-hydrogen exchange reactions, the total volume mass transfer coefficient Kya for the Pt/NiCo 2 O 4 /C/NF superhydrophobic catalyst reached 17.35 × 10 –2 s –1 , indicating strong catalytic performance. Graphical abstract
研究领域:
催化
·
材料科学
·
化学工程
·
表面科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）