INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 18
·14085
·
IF 5.6
Yue Wu,Guangyuan Lu,Ping Xu,Tian C. Zhang,Huaqiang He,Shaojun Yuan
The pursuit of superhydrophilic materials with hierarchical structures has garnered significant attention across diverse application domains. In this study, we have successfully crafted Ni-Mn LDHs@CuC2O4nanosheet arrays on a copper mesh (CM) through a synergistic process involving chemical oxidation and hydrothermal deposition. Initially, CuC2O4nanosheets were synthesized on the copper mesh, closely followed by the growth of Ni-Mn LDHs nanosheets, culminating in the establishment of a multi-tiered surface architecture with exceptional superhydrophilicity and remarkable underwater superoleophobicity. The resultant Ni-Mn LDHs@CuC2O4CM membrane showcased an unparalleled amalgamation of traits, including superhydrophilicity, underwater superoleophobicity, and the ability to harness photocatalytic forces for self-cleaning actions, making it an advanced oil-water separation membrane. The membrane’s performance was impressive, manifesting in a remarkable water flux range (70 kL·m−2·h−1) and an efficient oil separation capability for both oil/water mixture and surfactant-stabilized emulsions (below 60 ppm). Moreover, the innate superhydrophilic characteristics of the membrane rendered it a prime candidate for deployment as a supercapacitor cathode material. Evidenced by a capacitance of 5080 mF·cm−2at a current density of 6 mA cm−2in a 6 M KOH electrolyte, the membrane’s potential extended beyond oil-water separation. This work not only introduces a cutting-edge oil-water separation membrane and supercapacitor electrode but also offers a promising blueprint for the deliberate engineering of hierarchical structure arrays to cater to a spectrum of related applications.Keywords:superwetting mesh;self-cleaning;oil/water separation;supercapacitors
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PubMed
高影响因子
FUEL
·
2023
·
IF 7.4
Yuheng Qiao,Zhenzhen Guan,Mengyan Zhang,Gan Chen,Shifeng Zhou,Hailong Liu,Jiang Wu,Ruitang Guo,Weiguo Pan,Fangqin Li,Ping He
In this paper, a series of Fe-based catalysts with Zeolite Socony Mobil-5 (ZSM-5) as supports were synthesized using the sol–gel method to obtain the Fe/ZSM-5, Mn-Fe/ZSM-5, Cu-Fe/ZSM-5 and Cu-Mn-Fe/ZSM-5 catalysts. The synthesized catalysts were examined and characterized via catalytic activity testing, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), N 2 adsorption/desorption, scanning electron microscope (SEM), temperature-programmed desorption of NH 3 (NH 3 -TPD), temperature-programmed reduction with H 2 (H 2 -TPR) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The results showed that the Cu-Mn-Fe/ZSM-5 catalyst had the best catalytic performance compared with the other catalysts. In addition, Fe/ZSM-5 and Cu-Mn-Fe/ZSM-5 all exhibited excellent stability as well as good tolerance to SO 2 & H 2 O under the experimental conditions. Further characterization results showed that with co-doping of Cu and Mn, the amount of Mn 4+ , Cu + , Fe 3+ and surface chemisorbed oxygen (O β ) on the surface of Fe/ZSM-5 increased, promoting the catalytic performance. The DRIFT studies revealed that the NH 3 -SCR reaction followed both the E-R and L-H mechanism on the surface of the Fe-based ZSM-5 catalyst. The Fe-based ZSM-5 catalyst is a good candidate for NH 3 -SCR both in high reactivity and outstanding stability.
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高影响因子
INORGANICA CHIMICA ACTA
·
2023
·
IF 2.8
Ruiqin Huang,Wei Li,Xiaoling Luo,Zheng Liu,Guo-Cheng Han,Runzhi Wei
2,5-bis(trifluoromethyl)terephthalic acid (H 2 L 1 ) as the main ligand and 1,10′-phenanthroline (L 2 ) as the co-ligand were reacted with manganese chloride tetrahydrate (MnCl 2 ·4H 2 O), nickel sulfate hexahydrate (NiSO 4 ·6H 2 O) and cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) by solvothermal reaction to give the manganese complex [Mn 2 (L 1 ) 2 (L 2 ) 2 ] n ( 1 ), the nickel complex {[Ni 3 (L 1 ) 3 (L 2 ) 2 (H 2 O) 4 ]·2DMF} n ( 2 ) and the cobalt complex {[Co 2 (L 1 ) 2 (DMF) 2 ]·H 2 O} n ( 3 ). The structures were characterized and their properties studied by means of single-crystal X-ray diffraction, infrared spectroscopy, elemental analysis, ultraviolet spectroscopy, fluorescence spectroscopy, thermogravimetric analysis. The single-crystal structure analysis showed that the complexes 1 – 3 are infinitely extended three-dimensional network-like structures of space groups P 1 - , P 1 - , P 2 1 / n , respectively. The results of fluorescence analysis and thermogravimetric analysis showed that complexes 1 – 3 have good thermal stability and fluorescence properties, respectively. Complex 3 can also maintain good thermal stability at 230 °C, and the maximum fluorescence emission wavelength is 370 nm.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 21
·10455-10462
·
IF 3.3
Mengting Chen,Qifeng Zhong,Jiao Ma,Zhiyang Zhang,Yingxin Liu,Zuojun Wei,Shuguang Deng
Hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL) is a key reaction in the conversion of biomass to renewable fuels and value-added chemicals. Developing low-cost, highly efficient and reusable non-noble metal-based heterogeneous catalysts is vital but challenging. Herein, non-noble Ni–Mn/SiO2 catalysts with a low Ni loading (2.0 wt%) were designed for the selective hydrogenation of LA to GVL. The results showed that the optimal Ni–Mn/SiO2 (Ni/Mn = 2) catalyst with well-dispersed and small-sized metal nanoparticles (2.21 nm) and moderate acid sites exhibited excellent activity and selectivity and achieved a 100% yield of GVL in a 1,4-dioxane solvent under mild reaction conditions (e.g., 0.8 mol% Ni, 140 °C and 2.0 MPa H2) for 5.5 h and a 100% GVL yield at 180 °C for 2 h with a turnover frequency (TOF) of 190.2 h−1, which is better than most non-noble metal catalysts reported. Furthermore, the catalyst exhibited excellent reusability and could be recycled at least five times with only slight activity loss. This work provides new insights for the rational design of highly efficient and stable non-noble metal catalysts for the conversion of LA to GVL.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 11
·5420-5430
·
IF 3.3
Qi Guo,Jihong Xu,Rui Tang,Yulin Min,Zhenhu Hu,Penghui Shi
In the degradation process of organic pollutants, compared with the free radical pathway, the non-radical pathway shows the advantages of mild oxidation ability, strong anti-interference, and adaptation to different pH values. In this study, a manganese–nitrogen co-doped porous carbon (Mn–N@C-1) with high nitrogen content was prepared to improve the contribution rate of non-radical pathways to the degradation process of organic pollutants. The high performance of Mn–N@C-1 is attributed to the formation of Mn–Nx sites between Pyridine N and Mn, which can effectively oxidize organic pollutants in water (phenol, bisphenol A, 2,4-dichlorophenol). In addition, the catalyst exhibits high catalytic activity over a wide pH range (pH = 3–9) and has good immunity to inorganic anions. Moreover, the Mn–Nx site and graphitic-N are considered to be the generation sites of singlet oxygen, and the role of metastable Mn–N@C-1/PMS* complexes in the electron transfer process is explored. Overall, this study explores the crucial role of non-radical pathways in the degradation of organic pollutants by carbon-based materials.
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高影响因子
Reaction Chemistry & Engineering
·
2023
·Vol. 8
·期 5
·1185-1191
·
IF 3.9
Lingjiang Kou,Yong Wang,Jiajia Song,Taotao Ai,Koji Kajiyoshi,Panya Wattanapaphawong,Jintao Wang
Developing a structurally controlled electrode has attracted widespread attention in recent years, which is ascribed to the morphology of cathode materials having an influence on the electrochemical performance. Herein, we present Mn-decorated (NH4)2V10O25·8H2O (NVOH) materials with a cauliflower-like, tremella-like, and purslane-like structure via a solvothermal approach. When examined as a cathode material for aqueous zinc-ion batteries (ZIBs), all three materials with different morphologies exhibited superior electrochemical performances. Especially for materials with a tremella-like structure, benefiting from the uniqueness of the porosity structure of the tremella, the active material has a larger contact area with the electrolyte, which increases the active sites and diffusion coefficient of Zn2+. This tremella-like NVOH delivered a high rate capability of 159 mA h g−1 at 500 mA g−1 together with long-term stability (85% retention after 500 cycles at 500 mA g−1). This study has great significance for the exploitation of cathode electrodes of aqueous ZIBs with high reversible specific capacity and long cycle life and provides a promising candidate cathode for practical rechargeable aqueous ZIBs.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Yuefeng Liu,Jun Zhao,Yan Zhang,Huafang Zhang,Zhenlong Zhang,Huiping Gao,Yanli Mao
Upconversion nanoparticles (UCNPs) doped with lanthanide ions have potential applications in biomedical, solar cells and displays. However, the intensity of the upconversion luminescence (UCL) is limited by the surface effects of nanomaterials , lattice defects, etc. Here, a novel α-NaErF 4 hollow nanocube is fabricated by using divalent manganese ions (Mn 2+ ) to substitute trivalent erbium ions (Er 3+ ) in the NaErF 4 matrix. The hollow-shell structure can weaken the luminescence quenching and surface quenching effects, reduce the energy loss of higher energy levels in nanoparticles , and improve the light capture ability of nanoparticles. So the UCL of α-NaErF 4 hollow nanocubes is greatly improved, which is 14, 790 and 1071 times higher than that of the β-NaErF 4 under 808, 980 and 1530 nm laser excitation, respectively, and the emission in the red region is enhanced respectively by 69, 2049 and 2902 times. In particular, the hollow nanocubes emit intense single-band red emission under the three different wavelengths, respectively. Moreover, the magnetization of α-NaErF 4 hollow nanocubes is 2.16 emu g −1 at room temperature, which is larger than that of gadolinium-based materials. Hollow-shell structure, excellent paramagnetism and single-band red upconversion emission excited by various wavelengths will create NaErF 4 :40Mn UCNPs a good application prospect in the biomedical field.
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高影响因子
Journal of Cleaner Production
·
2018
·
IF 5.651
Yue Yang,Shaole Song,Feng Jiang,Jiahui Zhou,Wei Sun
Recovering metal values from spent Lithium ion batteries (LIBs) enjoys a great significance in environmental protection and sustainable development of resources. But the application of mixed-type cathode materials in PHEV and EV with high content of manganese brings new challenges for spent LIBs recycling. In this study, a facile approach for directly regenerating Mn-rich cathode material from mixed-type spent cathode materials was developed. The spent cathode materials were firstly tested by X-Ray Diffraction (XRD) and X-ray fluorescence (XRF) and then leached in H 2 SO 4 +H 2 O 2 system. The spherical Mn-rich cathode material was directly regenerated from leaching liquor through a facile co-precipitation method followed by solid-phase sintering. The regenerative cathode material was measured by XRD, scanning electron microscope (SEM) equipped with energy dispersive X-ray spectroscopy system (EDXS), inductively coupled plasma atomic emission spectrometry (ICP), laser particle size analyzer and electrochemical tests. According to the results, pure cathode material exhibits a uniform particle size distribution and a layered structure. Furthermore, the regenerative cathode material with high working voltage (>4.5 V) possesses excellent discharge capacity. Cleaner production analysis indicates that whole process can effectively reduce waste residue and water, and helps turn the solid waste into resource. Meanwhile, compared to traditional methods, the proposed process can simplify the recovery process, obtain high value added Mn-rich cathode material and maximize the recovery of manganese in the mixed-type spent cathode materials.
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高影响因子
SOLAR ENERGY
·
2019
·
IF 4.674
Zhen Li,Libo Yu
Mn-Cd x Zn 1-x Se@ZnO multi-shelled (including single-shelled, double-shelled, and triple-shelled) hollow microspheres (HMS) were successfully synthesized for application in quantum dots sensitized solar cell (QDSSC). The influence of shell numbers on photovoltaic performance of QDSSC were investigated. The results showed that larger surface area, repeated light reflection and reinforced light scattering can be achieved with triple-shelled HMS, which can improve light harvesting efficiency. Furthermore, midgap state created by Mn-doping in Cd x Zn 1-x Se will facilitate electrons injection and collection from excited Cd x Zn 1-x Se quantum dots (QDs) to ZnO. The multi-shelled effects and Mn-doping finally improve the short-circuit current (J sc ) of Mn-Cd x Zn 1-x Se@ZnO tripled-shelled HMS solar cell to 20.21 mA cm −2 , leading to the power conversion efficiency significantly enhanced to 3.39%.
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高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 28
·13668-13675
·
IF 9.931
Hongtao Guan,Pan Cai,Xiaomeng Zhang,Yanlin Zhang,Gang Chen,Chengjun Dong
We demonstrate the design and fabrication of novel Cu2O@Mn(OH)2 core–shell hierarchical structures using octahedral Cu2O as a template. The Cu2O backbone supports the growth of an ultrathin Mn(OH)2 nanoflake shell, leading to a relatively large surface area (65.8 m2 g−1) for sufficient utilization of active materials. Cyclic voltammetry (CV) and galvanostatic charge–discharge measurements (GCD), as well as cycling stability and electrochemical impedance spectroscopy (EIS) were performed to examine the electrochemical performances of the Cu2O@Mn(OH)2 core–shell structure. Applied as a supercapacitor electrode, the Cu2O@Mn(OH)2 composite delivers a high specific capacitance of 540.9 F g−1 at 1 A g−1 and an energy density of 6.4–18.2 Wh kg−1. After conducting 3000 cycles at 5.0 A g−1, the capacitance retention of 71.5% was achieved. The unique core–shell structure of the Cu2O@Mn(OH)2 composite favours the effective transport of electrolytes and shortens the ion diffusion path. In addition, the synergetic effects from both Cu2O and Mn(OH)2 significantly enhance the electrochemical performances. Our findings suggest that this Cu2O@Mn(OH)2 core–shell is very promising for next generation high-performance supercapacitors.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2017
·
IF 4.421
Yuanfeng Wu,Xianghai Song,Shuai Li,Jiahui Zhang,Xinghui Yang,Pengxin Shen,Lijing Gao,Ruiping Wei,Jin Zhang,Guomin Xiao
[(CH 3 ) 2 NH 2 ][M 3 (BTC)(HCOO) 4 (H 2 O)] . H 2 O (M–BTC, M = Mn, Ni, Co) were prepared under hydrothermal conditions and used as highly efficient catalysts for cycloaddition of CO 2 with epichlorohydrin (ECH). The microstructure and physicochemical properties of the compounds were determined by PXRD, FT-IR, XPS, N 2 -adsorption, TG–DSC, NH 3 –TPD and CO 2 –TPD. 98.01% conversion of ECH and 96.05% selectivity to chloropropene carbonate was obtained over the Mn–BTC under the optimized reaction conditions (105 °C, 3.0 MPa, 9 h, 1.5 wt.% of ECH). Besides, the recyclability result exhibited the Mn–BTC compound can be utilized as least three times with a slight reduction in its catalytic ability. In addition, cycloaddition of CO 2 with other epoxides and DFT calculation were also performed. The result exhibited the yield followed the order: ECH > 1, 2-epoxybutane > propene oxide > Allyl glycidyl ether, which was mainly determined by the energy of reaction.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Tao Huang,Dongping Song,Zhengfeng Hu,Yuxuan Feng,Jialin Cui,Mengyue Wu,Di Wu,Yinglan Luo,Yue Li,Yirong Jiang,Chaojun Tang,DanDan Wang
The urgent need for remediation of thallium (Tl)-contaminated soils arises from its widespread presence as a poisonous heavy metal (HM), coupled with numerous challenges such as high costs, long durations, secondary pollution risks, and technological limitations. In the study, a novel approach has been introduced to the remediation of Tl-contaminated soils using calcium sulphoaluminate cement. This innovation involves the employment of nonthermal plasma-irradiated polyvalent Ce-Mn (hydro)oxide-modified nanographene (NTP-P-Ce-Mn-NGs) to intensify the cementation and immobilization of Tl species. The chemical speciation of Tl contaminants influenced by the dosage of NTP-P-Ce-Mn-NGs in the cementation was measured to explore the potential enhancement mechanisms brought by NTP-P-Ce-Mn-NGs in the sulphoaluminate cementation. Comprehensive strategies were adopted to explore the reaction pathways. In orthogonal (OD) experiments, compressive strengths ranging from 22.14 to 56.78 MPa in sulphoaluminate-cemented cubes were achieved. Remarkably, when NTP-P-Ce-Mn-NGs were introduced, the leached Tl concentration was reduced to 0.21–21.46 µg/L. This significant reduction was attributed to the NTP-P-Ce-Mn-NGs-induced more uniform hydration reactions and a more holistic microstructure. The presence of diverse valent Ce and Mn species within the matrix was confirmed, revealing a reliable interaction between NTP-irradiated high-valent Mn and Ce with monovalent Tl ions. This interaction induced multiple redox reactions, immobilizing Tl contaminants within the matrix and the cementation encapsulation. This study represents a significant milestone in Tl pollution control, paving the way for more efficient and cost-effective soil remediation strategies.
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高影响因子
危险品化学品经营许可证（带存储）