JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Fan-Fan Wang,Yu-Rui Ji,Yu-Hao Chen,Peng-Fei Wang,Qin-Zhi Lai,Feilong Qiu,Yan-Rong Zhu,Ting-Feng Yi
Li-rich Mn-based oxides (LRMOs) are considered as one of the most-promising cathode materials for next generation Li-ion batteries (LIBs) because of their high energy density . Nevertheless, the intrinsic shortcomings, such as the low first coulomb efficiency, severe capacity/voltage fade, and poor rate performance seriously limit its commercial application in the future. In this work, we construct successfully g-C 3 N 4 coating layer to modify Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 (LMNC) via a facile solution. The g-C 3 N 4 layer can alleviate the side-reaction between electrolyte and LMNC materials, and improve electronic conduction of LMNC. In addition, the g-C 3 N 4 layer can suppress the collapse of structure and improve cyclic stability of LMNC materials. Consequently, g-C 3 N 4 (4 wt%)-coated LMNC sample shows the highest initial coulomb efficiency (78.5%), the highest capacity retention ratio (78.8%) and the slightest voltage decay (0.48 V) after 300 loops. Besides, it also can provide high reversible capacity of about 300 and 93 mAh g −1 at 0.1 and 10C, respectively. This work proposes a novel approach to achieve next-generation high-energy density cathode materials, and g-C 3 N 4 (4 wt%)-coated LMNC shows an enormous potential as the cathode materials for next generation LIBs with excellent performance.
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CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Mingxu Sui,Tianqi Fu,Xiaodong Sun,Guangzhen Cui,Xuliang Lv,Guangxin Gu
Unary and binary M 2+ (M=Mn, Co, Ni, Zn) substituted hollow Fe 3 O 4 were prepared by one-step solvothermal method. The crystallographic structure, morphology, element components and microwave absorbing properties of as-prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), Energy-dispersive X-ray (EDX) and vector network analyzer (VNA). The unary and binary Co 2+ substitution of hollow Fe 3 O 4 could result in a significant improvement of microwave absorption performance, including the expanding of effective absorption bandwidth, the thinner thickness and the increment of absorbing intensity. The sample of CoFe 2 O 4 could reach an optimal reflection loss of − 28.78 dB at 15.52 GHz under the thickness of 1.5 mm, moreover, the efficient absorption bandwidth (less than −10 dB) is expanded to 5.56 GHz which is most outstanding among these samples. The minimum reflection loss of Co 0.75 Zn 0.25 Fe 2 O 4 could reach − 49.60 dB at 9.88 GHz under the thickness of 2 mm. The as-prepared products could be used as microwave absorber with the advantages of strong absorption, broad bandwidth and thin thickness. The favorable performance could be attributed to the strong magnetic loss, dielectric loss and good impedance matching properties.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hao Zhang,Botao Fan,Rui Li,Qinghu Tang,Futing Xia,Wenhao Fang
The electrocatalytic 5-hydroxymethylfurfural oxidation reaction (HMFOR) has become a clean and fast-response route for synthesizing the sustainable biomonomer. Here, a Mn-doped Ni(OH) 2 catalyst is constructed and enables a 98.9 % yield of 2,5-furandicarboxylic acid and a 99 % Faradic efficiency with a stable durability up to 50 cycles for the alkaline HMFOR. The Mn-Ni(OH) 2 catalyst shows a low onset potential of ca. 1.29 V ( vs. reversible hydrogen electrode, RHE) and achieves a current density of 50 mA cm −2 at only 1.38 V in 1 M KOH, significantly outperforming the vast majority of Ni-based (oxy)hydroxide catalysts reported to date in the literature. The isomorphic substitution of Ni 2+ ions by the coordination unsaturated Mn ions brings about lattice expansions and crystal defects of the nanoflower-shaped Ni(OH) 2 catalyst. The distinctive Mn-doping effect can modulate the electronic structure and also oxygen vacancy formation on Ni(OH) 2 surface. The experimental and theoretical studies systematically unravel that the ingenious catalytic synergism can significantly boost the proton deintercalation feature of Ni(OH) 2 ( i.e. , an improved generation kinetics of the Ni 3+ (OH)O active center) and dramatically promote the adsorption ability of different reactive intermediates on Ni 3+ (OH)O. As a result, HMFOR is greatly enhanced on the as-prepared Mn-Ni(OH) 2 catalyst. The mechanism investigations further evidence that the activation processes of CH 2 OH and HC O groups during HMFOR must require the participations of OH − ions and H 2 O molecules, respectively. This work has clearly tracked the reconstruction process of a Ni electrocatalyst and firstly unlocked the activation behaviors of different functional groups, thus successfully getting deep insights into the real and dynamic catalytic mechanism for the alkaline HMFOR.
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Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 6
·120336
·
IF 7.2
Ganchen Zhou,Zhiqiang Chen,Xiaoying Jin,Zhibiao Chen,Zuliang Chen
Rare earth elements (REEs) have emerged as critical metallic resources in modern industries due to their unique physicochemical properties. However, rare earth elements are inevitably discharged into environments during mining operations, leading to impact the ecosystem and to loss rare earth elements. To address this, the carbonized Fe/Mn nanomaterials (C-Fe/Mn) were synthesized through green carbothermal reduction to achieve efficient recovery of rare earth elements. It can be seen that the maximum adsorption efficiencies of REEs by synthesized material were yttrium (Y(Ⅲ) 98.28 %), lanthanum (La(Ⅲ) 97.37 %), dysprosium (Dy(Ⅲ) 88.75 %), and ytterbium (Yb(Ⅲ) 77.27 %), respectively. Through advanced characterization, C-Fe/Mn's magnetic properties have been confirmed, which enables direct recovery from wastewater and easy separation in application. The results showed that the carbon coating provides additional active sites, thereby enhancing its adsorption capacity, while the presence of zerovalent iron lattice improves its stability. Therefore, its efficient adsorption of rare earth elements is mainly attributed to the combined effect of complexation and electrostatic force. Finally, column experiments demonstrated that rare earth elements can be effectively removed and desorbed by C-Fe/Mn under continuous flow, indicating its potential for practical application. Overall, this approach not only mitigates environmental pollution but also promotes resource recycling, offering dual economic and ecological benefits.
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Catalysts
·
2026
·Vol. 16
·期 10
·857
·
IF 4.5
Piaoyin Zhang,Peiyuan Li,Yingchun Sun,Xin Sun,Ye Jiang,Zhengda Yang,Yang Yang
The control of CO emissions from iron and steel sintering flue gas has received increasing attention. In this work, Pt-loaded Mn–Cu catalysts were prepared by a redox precipitation method to investigate the effects of Pt loading and calcination temperature on low-temperature CO oxidation activity and SO2-induced deactivation behavior. Among the tested catalysts, 1Pt/MnCu-300, containing 1 wt.% Pt and calcined at 300 °C, exhibited the highest low-temperature CO oxidation activity and achieved complete CO conversion at 75 °C. Under the specified SO2-containing test conditions, all catalysts eventually underwent severe and largely irreversible deactivation, whereas Pt loading and calcination temperature altered the transient CO-conversion decay profiles. Pt/MnCu-450 retained high CO conversion for a longer initial period during SO2exposure than the other catalysts in the calcination-temperature series; however, this observation does not by itself demonstrate superior intrinsic SO2tolerance because the present experiments did not quantify SO2breakthrough, sulfur uptake, or active-site-normalized deactivation rates. Characterization results show that Pt modification increased the specific surface area, altered the Mn3+/Mn4+ratio and surface oxygen species, promoted oxygen-vacancy formation, and enhanced CO adsorption and redox properties. These physicochemical changes are correlated with the improved low-temperature CO oxidation activity of Pt-modified Mn–Cu catalysts. This work clarifies the effects of Pt loading and calcination temperature on CO oxidation performance and on the transient response to SO2exposure.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xin Yu,Xiaoqing Dang,Shijie Li,Yu Li,He Wang,Kairui Jing,Haoyun Dong,Xia Liu
Metal-support interaction has a substantial influence on catalyst activity while little attention has been paid to it in the plasma catalytic system. Herein, the effect of support on the activity of CoMnO X -based catalysts was investigated for trichloroethylene removal by plasma catalysis, and CoMnO X /ZSM-5 exhibited the highest mineralization rate (36.93−94.24 %), HCl and Cl 2 yield (19.66−94.37 %), energy yield (63.29–29 g/kWh), as well as the lowest export ozone concentration (18.72–108.83 mg/m 3 ) under 6–10 kV. The excellent catalytic activity of CoMnO X /ZSM-5 was ascribed to the formation of abundant defects and oxygen vacancies , which was induced by the Si O Co/Mn hybridization promoting Co/Mn O bonds cleavage. CoMnO X /ZSM-5 also exhibited superior adsorption ability, large amount of Co 3+ , Mn 4+ and adsorbed oxygen species, high reducibility and suitable acidity. Moreover, CoMnO X /ZSM-5 maintained superior water-resistant ability and high catalytic activity after 50 h operation. The proposed TCE degradation mechanism suggested that the contribution of plasma active oxygen species was involved in TCE oxidation and oxygen cycle of catalyst. This work provides a novel strategy to design catalysts in plasma catalytic system.
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JOURNAL OF CHEMICAL THERMODYNAMICS
·
2016
·
IF 2.196
Pan Liang,Jie Wang,Zhi-Hong Liu
A pure zinc borate, Zn[B 12 O 14 (OH) 10 ], has been synthesized and characterized by XRD, FT-IR, simultaneous TG-DTA techniques, and chemical analysis. The molar enthalpy of solution of Zn[B 12 O 14 (OH) 10 ] (s) in 1 mol·dm −3 HCl(aq) was measured by microcalorimeter at T = 298.15 K. The molar enthalpy of solution of ZnO(s) in the mixture solvent of 2.00 cm 3 of 1 mol·dm −3 HCl(aq) and calculated amount of H 3 BO 3 was also measured. With the incorporation of the previously determined enthalpy of solution of H 3 BO 3 (s) in 1 mol·dm −3 HCl(aq), together with the use of the standard molar enthalpies of formation for ZnO(s), H 3 BO 3 (s), and H 2 O(l), the standard molar enthalpy of formation of −(9646.6 ± 9.6) kJ·mol −1 at T = 298.15 K was obtained on the basis of an appropriate thermochemical cycle. In addition, the molar enthalpy of formation of −9492.7 kJ·mol −1 for [B 12 O 14 (OH) 10 ] 2− has also been estimated by a group contribution method, which has been used to predict the Δ f H m θ of a series of transition metal borates of M[B 12 O 14 (OH) 10 ] (M II = Mn, Zn, Fe, Co, Ni). These estimated data have been used to further compare the stability of this series of transition metal borates.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Huating Huang,Weiqing Li,Xixi Chen,Zhiming Yang,Minggang Chen,Anhong Zhang,Chun He,Shuanghong Tian
The strong metal–support interaction (MSI) has been widely attributed to enhanced catalytic activity. However, this attribution might be wrong in catalytic ozonation, since MSI that is too strong might impede the activation of electron-poor ozone molecules. Herein, we reported a strategy to subtly modulate the Mn–O–Si interaction by intercalating the carbon film between the silica support and active manganese oxide. When using MnOx/0.5C/SiO2 with the moderate MSI as a catalyst in the catalytic ozonation of refractory paracetamol (PCM), 91.1 ± 2.4% of PCM was removed within 30 min, about 30% higher than that using the catalyst of MnOx/SiO2 with a strong MSI. Moreover, the reaction rate reached 8.01 × 10–2 min–1, 2.2 and 1.3 times that with MnOx/SiO2 and MnOx/1C/SiO2, respectively. Importantly, further integration of MnOx/0.5C/SiO2 into membrane filtration achieved high rejections of PCM (>94.3%) under various realistic water scenarios during a continuous 12 h operation, demonstrating strong resistance to environmental matrices interference. Experimental and theoretical evidence revealed that the moderate MSI resulted in the high dispersion of active MnOx nanoclusters in the size of 2.3–4.4 nm and promoted the adsorption of ozone over MnOx and its dissociation into surface *O, •OH, •O2–, and 1O2 for decontamination. As a constructive work, this study revealed the significance of MSI in catalytic ozonation and offered a simple regulation method for constructing active interfaces of metal-supported catalysts.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
·
IF 3.7
Shaopeng Li,Weichao Li,Yun Wu,Xianming Zheng,Xuehui Zhao,Ning Nan,Hongwei Zhang
The performance of supported catalysts is significantly affected by the dispersion degree of the active components on the support. In this study, citric acid (CA) was used as a modifier to prepare Al 2 O 3 supported Mn-Ce oxides (Mn-Ce/CA-Al 2 O 3 ) by the impregnation-calcination method. The characterization results showed that adding citric acid enhanced the dispersion of Mn-Ce oxides on the support, rendering Mn-Ce/CA-Al 2 O 3 with a larger specific surface area and abundant surface hydroxyl groups, thereby providing more reaction sites for catalytic ozonation. The Mn-Ce/CA-Al 2 O 3 exhibited excellent catalytic ozonation performance in degrading Reactive Black 5 (RB5) dye. It achieved nearly complete decolorization of RB5 within 60 min, with a COD removal efficiency of 60%, which was superior to the sole ozonation (30%). Furthermore, the Mn-Ce/CA-Al 2 O 3 system demonstrated significant degradation of RB5 over a wide pH range of 3–11. Based on the XPS and EPR analysis results, a preliminary mechanism of catalytic ozonation over the Mn-Ce/CA-Al 2 O 3 was proposed. The redox cycle of Mn 3+ /Mn 4+ and Ce 3+ /Ce 4+ effectively accelerated the electron transfer process, thus promoting the generation of reactive oxygen species (ROS) and improving the degradation of RB5. Meanwhile, the Mn-Ce/CA-Al 2 O 3 exhibited superior catalytic stability and effective treatment capabilities for real dye wastewater.
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Journal of Energy Storage
·
2025
·
IF 9.8
Yanmin Qin,Shihao Zhao,Haoda Wu,Chenxu Sun,Jing Xu,Ming Yang,Ruidan Shi,Haifeng Bao
Transition metal sulfides such as FeS are promising anode materials for lithium-ion batteries (LIBs) due to their high theoretical capacity and natural abundance. However, their practical application is hindered by poor electronic conductivity, severe volume expansion, and irreversible structural degradation. To overcome these limitations, we report a dual-regulation strategy that integrates Mn doping and nitrogen-doped carbon (NC) coating to synergistically enhance both the lattice structure and interface characteristics of FeS. The resulting Mn-FeS/NC composite exhibits anisotropic lattice expansion, with the (102) crystal plane spacing increasing from 0.209 nm to 0.263 nm. Density functional theory (DFT) calculations reveal that Mn doping significantly lowers the Li + insertion/extraction energy barrier. Meanwhile, the NC coating forms a highly conductive and flexible network that buffers volume changes and enhances interfacial stability. Benefiting from this multiscale synergy, Mn-FeS/NC delivers a high initial discharge capacity of 1660.4 mAh g −1 at 0.1 A g −1 with an initial Coulombic efficiency of 75.8 %, and maintains 728.9 mAh g −1 after 600 cycles at 1.0 A g −1 . Even at 5.0 A g −1 , a capacity of 413.6 mAh g −1 is retained. Kinetic analysis confirms a dominant pseudocapacitive behaviour, contributing up to 72.3 % at high scan rates. This study not only provides quantitative insight into the synergistic effect of Mn doping and NC encapsulation, but also offers a viable design strategy for high-performance metal sulfide anodes in next-generation LIBs.
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Advanced Energy Materials
·
2025
·Vol. 15
·期 34
·2502226
·
IF 26
Mengting Guo,Changping Wang,Yize Niu,Mingyue Ruan,Dong Yang,Fei Wang,Haonan Wang,Nankai Wang,Ying Jiang,Tianyi Li,Yan He,Qiang Li
The high-voltage spinel LiNi 0.5 Mn 1.5 O 4 (LNMO) is a promising cathode material for lithium-ion batteries due to its high energy and power densities, excellent thermal stability, low cost, and environmental benignity. However, the presence of Mn 3+ induces Jahn─Teller (J─T) distortion, leading to Mn─O bond elongation, lattice stress, and degradation of both structural and electrochemical stability during cycling. To address this,a bond-length engineering strategy is proposed by co-doping Fe at the Mn 16d sites and Sb at the vacant 16c positions to suppress the J─T effect and stabilize the crystal structure. Electron paramagnetic resonance (EPR), in situ X-ray diffraction (XRD), and density functional theory (DFT) calculations confirm that the Mn─O bond regulation strategy effectively mitigates MnO 6 octahedral distortion, reduces phase transitions, and enhances structural robustness. Moreover, Sb incorporation expands the lattice, facilitating Li + diffusion. As a result, the optimized FeSb-LNMO delivers remarkable electrochemical performance, retaining 98% of its initial capacity after 200 cycles at 1C, and achieving 85.6% capacity retention over 1000 cycles at 5C. This work introduces a novel bond-length engineering approach via multi-site doping to overcome degradation in high-voltage LNMO, enabling ultra-fast charging and long-term cycling stability.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Mingyu Chang,Jingcheng Lv,Lianhui Sun,Aihong Chen,Fengbo Zhang,Guangjian Fan,Zhanliang Liu,Jun Li,Hongliang Shen,Mingjun Shi,Yinong Niu,Ye Tian,Xijian Liu,Boyu Yang
Benign prostatic hyperplasia (BPH) presents a significant clinical challenge, with conventional therapies carrying substantial risks, including urinary retention, sexual dysfunction, and prolonged recovery. To address the urgent need for safer, ultra-minimally invasive alternatives, we developed a sonosensitizing nanoplatform using copper–manganese-doped mesoporous silica nanoparticles (Cu–Mn@SiO2) for ultrasound-induced sonodynamic therapy (SDT). Here, we demonstrate that this innovative strategy provides highly effective and precisely targeted therapy for BPH. In vitro studies revealed that Cu–Mn@SiO2-mediated SDT significantly amplified intracellular reactive oxygen species (ROS) generation, triggering oxeiptosis characterized by PGAM5 cleavage, mitochondrial membrane depolarization, and mitochondrial damage in both BPH-1 epithelial and WPMY-1 stromal cells. In a testosterone-induced BPH rat model, a Cu–Mn@SiO2-combined, localized SDT treatment resulted in a substantial 60% reduction in prostatic weight and a marked improvement in urinary function. Thermal imaging confirmed prostate-specific hyperthermia without affecting the surrounding tissues. Histopathology revealed reduced collagen deposition and restored glandular morphology with comprehensive biosafety assessments showing no systemic toxicity. By precisely inducing localized oxeiptosis within hyperplastic prostatic tissue via focused ultrasound activation, this Cu–Mn@SiO2-based nanoplatform represents a clinically translatable, ultra-minimally invasive therapeutic strategy offering a superior safety profile for BPH management.
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