ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Ling-Yun Li,Ming-Yuan Shen,Jing-Song Wang,Tao Wu,Wen-Cui Li
P2-type Mn-based layered oxide cathode materials are competitive candidates for sodium-ion batteries (SIBs), which are expected to be widely used in large-scale electrochemical energy storage applications due to their easy availability. However, MnO6 octahedra centered around Mn3+ are inclined to adverse phase transitions and lattice oxygen loss under high operating voltages, which markedly compromise the capacity and cycling stability. Here, a configurational entropy tuning strategy was proposed to optimize the P2-type Na0.8Li0.17Mg0.18Mn0.66O2 (LMM) cathode. The as-synthesized cathode material, Na0.8Li0.17Ca0.025Mg0.12Ni0.05Mn0.66O2 (LMCNM), conforms to the standard P63/mmc crystal phase. Impressively, this material exhibits a capacity retention rate of 92% after 100 cycles at a 0.4C rate (where 1C = 125 mA h g–1) and demonstrates minimal volume change (0.94%) during charge–discharge cycles at higher working voltages (2.0–4.3 V). In situ X-ray powder diffraction (XRD), ex situ X-ray photoelectron spectroscopy (XPS), and computational analyses collectively indicate that through the charging and discharging processes of LMCNM, there is no obvious Jahn–Teller distortion, while there is clear evidence for charge compensation from Mn3+ to Mn4+. Furthermore, partial reversible anionic redox has been achieved through codoping with Ca and Ni to harmonize expressive stability and high capacity.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Wensheng Lei,Minglin Sun,Wenliang Zhang,Liuan Liang,Zhezheng Ding,Xiao Tang,Haonan Dai,Xiaomin Liu,Pengfei Qi,Yan Wang
The efficient and sustainable removal of hexavalent chromium (Cr(VI)) from wastewater is a critical challenge in environmental engineering. Herein, an ultra-stable and recyclable cellulose nanofiber-based composite membrane (CNF@MN@MX) was fabricated via vacuum-assisted filtration by integrating cellulose nanofibers (CNFs), indium-based metal-organic frameworks (MIL-68(In)-NH₂, MN), and Ti₃C₂Tₓ MXene (MX). The CNFs provide a robust structural scaffold, MN imparts visible-light photoactivity, and MX establishes a highly conductive network that facilitates charge separation and transport. Comprehensive structural and photoelectrochemical characterizations confirmed strong interfacial coupling among the three components, leading to enhanced electron mobility and light-harvesting capacity. The optimized CNF@MN@MX membrane (mass ratio CNF:MN:MX = 1:1:1) exhibited a specific surface area of 22.65 m 2 /g, a maximum Cr(VI) adsorption capacity of 17.79 mg/g, and nearly complete Cr(VI) reduction under visible-light irradiation. Notably, the membrane retained over 70% removal efficiency after 20 regeneration cycles and maintained excellent performance in the presence of common anions. Density functional theory (DFT) calculations revealed that MX incorporation lowered the Gibbs free energy of Cr(VI) reduction from −1.19 to −1.72 eV, confirming the thermodynamic advantage of MX-facilitated electron transfer. Furthermore, the CNF@MN@MX membrane efficiently purified simulated industrial effluents, yielding residual Cr(VI) concentrations below the regulatory limit. This work provides a robust design strategy for constructing conductive, photoactive, and recyclable membrane systems for advanced heavy-metal wastewater treatment.
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Sustainable Materials and Technologies
·
2026
·
IF 9.2
Rumeng Ye,Kai Tian,Yingzhe Xu,Jianbiao Peng,Xingbing He,Minjie Deng,Xueying Chu
Current studies involve excessively complex synthesis of metal-modified biochar for the adsorption of tetracycline hydrochloride (TC), focusing on the effects of a single strategy and neglecting systematic comparisons. For environmental sustainability, Fe₃O₄/MnOₓ-modified rice husk biochar (BC) was simply synthesized by impregnation-precipitation. Batch adsorption experiments were conducted on BC, Fe-modified (BC-Fe), and KMnO 4 -modified (BC-Mn) biochars to assess their TC removal efficiency. The mechanisms were investigated by FTIR, XRD, XPS, and UV–vis. Results demonstrated BC-Fe and BC-Mn exhibited significantly enhanced TC adsorption capacities compared with BC (170.06/266.94/132.86 mg/g, respectively). This improvement is attributed to increased specific surface area, refined microporous architecture, enriched O-containing functional groups, and the incorporation of Fe 3 O 4 /MnO x nanoparticles. Divergent adsorption behaviors were observed: BC-Fe operates through an endothermic process dominated by diffusion, pore filling, electrostatic adsorption, coordination interactions, and hydrogen bonding; this process is pH-sensitive and further promoted by the presence of SO 4 2− , PO 4 3− and CO 3 2− ions. In contrast, BC-Mn exhibits a stable adsorption mechanism minimally affected by pH or ionic composition, combining diffusion, pore filling, and hydrogen bonding with catalytic oxidation (Mn (III), Mn (IV)) that disrupts and degrades the conjugated structure of TC. Fe/Mn-modified adsorption guides TC targeted remediation and rice husk sustainable utilization. By converting agricultural byproducts into high-performance environmental remediation materials, this study advances the ecological circular economy, realizing the dual value of waste recycling and pollution control.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·Vol. 47
·期 47
·20561-20571
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IF 7.139
Tianyu Ai,Jing Li,Shuai Nie,Yansheng Yin,Jinlin Lu,Shuo Bao,Ling Yan
Transition elements doping metal oxide is of great significance for developing gas sensors with high performance. To achieve this goal, α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons are successfully synthesized by a facile N, N-dimethylformamide assisted hydrothermal method and characterized by several physical techniques. The morphology of α-Fe 2 O 3 is evolved by introducing Mn elements. The performance of the α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons as H 2 gas sensors are studied and compared. The Mn/α-Fe 2 O 3 -5 polyhedrons sensor exhibit the best performance at optimum operating temperature of 300 °C. The response and recovery times are 10 s/24 s for H 2 with a concentration of 200 ppm, which is much faster in contrast to those recently reported H 2 gas sensors. Furthermore, α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons show abnormal n-p transition sensing behavior with the change of operating temperature. This work provides a facile method for synthesizing α-Fe 2 O 3 based sensing materials for various sensors applications.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Shangyi Zhao,Jing Li,Yanchanjuan Yang,Shuaiqi Zhao,Aihua Xu,Xiuying Liu,Xiaoxia Li
Sulfite (SO 3 2− ) has emerged as an economical and eco-friendly precursor for reactive species generation in advanced oxidation processes (AOPs). However, conventional activation strategies typically require high sulfite inputs and generate non-selective radicals, limiting their efficiency and practicality. Here, we demonstrate that a trace amount of water‑soluble manganese porphyrin complex (Mn(III)‑TCPP, as low as 4 μM), can efficiently activate Na 2 SO 3 at ultralow concentrations (10–100 μM) to degrade sulfadiazine. The Mn(III)-TCPP/Na 2 SO 3 system exhibited an initial rate 41 times faster than the Mn 2+ /Na 2 SO 3 system and 4.2 times greater than the reported -Mn(III)-NTA/Na 2 SO 3 system. A linear correlation between the degradation rate constant and the Hammett constant (σ + ) of porphyrin substituents confirms that ligand electronic structure modulates Mn redox cycling during SO 3 2− oxidation by dissolved O 2 . Mechanistic studies, including time‑resolved spectroscopy, electrochemical analysis, and reactive species trapping, reveal that the reaction proceeds primarily via superoxide radical and singlet oxygen, representing a distinct departure from conventional sulfate radical or high-valent Mn(V) that has been reported in other metal–ligand AOP systems. This work establishes a new, highly efficient sulfite activation driven by an ultralow-dose metalloporphyrin catalyst and provides fundamental insight into non‑radical oxidation routes for sulfite-based AOPs.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xiaoqiang Li,Xiaorui Zhang,Xin Zhang,Shengjun Wen,Xiaoxiao Duan,Yongsheng Ren
2-Mercaptobenzothiazole (MBT), a highly toxic industrial corrosion inhibitor containing a thiol group, poses severe threats to ecological and human health. In this study, a trimetallic cathode (FeCoMn@LNC-500) was fabricated by in situ growing oxygen-vacancy-rich FeCoMn-LDHs on carbon paper followed by carbonization at 500 °C. FeCoMn@LNC-500 exhibited a cylindrical fiber-rod structure decorated with numerous densely aggregated spherical particles, which increased the electrochemical active surface area and reduced the charge-transfer resistance. Under optimal conditions, FeCoMn@LNC-500/EF achieves a degradation rate of 100% within 70 min through singlet oxygen ( 1 O₂) mediated non-radical oxidation (k = 0.0557 min −1 ). The removal efficiency achieved with this cathode was approximately 11.8, 5.0, 2.0, and 3.2 times higher than those of the PC-500, FeMn@LNC-500, CoMn@LNC-500, and CoFe@LNC-500 cathode systems, respectively. The outstanding degradation performance is primarily attributed to the carbon paper's excellent conductivity, which enhances the in-situ synergistic cycling of Co, Fe, and Mn to accelerate the Fenton reaction while also improving system stability, as demonstrated by a 7-cycle operational test and the detection of extremely low metal-ion leaching. Quenching experiments and electron paramagnetic resonance (EPR) spectroscopy confirmed that the non-radical 1 O₂ played a dominant role in the oxidation process. HPLC-MS analysis revealed the degradation mechanism and pathway of MBT: non-radical-dominated selective cleavage of the S N bond followed by stepwise mineralization. The carbon-paper-based cathode developed in this work provides insights into the electro-Fenton degradation of thiol-containing wastewater and is expected to offer a new strategy for the efficient treatment of coal-chemical pipeline wastewater.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2026
·
IF 3.3
Qie Junmao,Cao Mengfei,Zong Jiaqi,Chang Jian,Zhang Shuqi,Xu Tong
Selective catalytic reduction (SCR) is presently the predominant technology for controlling nitrogen oxides (NO x ) emissions from industrial flue gas in China. Central to its operation is the denitration catalyst; however, the conventional systems face constraints such as a limited active temperature range, potential toxicity of certain active components, and high production costs. Bayan Obo rare earth tailings, enriched in catalytically active elements including Fe, Ce, and Nb, present a promising alternative raw material for denitration catalyst development. Currently, catalyst modification to improve denitration performance is a key research focus. In this study, Fe-rich magnetic separation rare earth tailings were obtained via magnetic separation processing of Bayan Obo tailings. We systematically evaluated the denitration performance and mechanism of catalysts prepared from these magnetic separation rare earth tailings through Mn modification in combination with NaOH alkaline fusion activation. Results indicate that when the catalyst is produced under conditions of 3 wt.% Mn loading and an ore-to-alkali ratio of 1:1.5, activated at 200 °C, the denitration efficiency reaches 89.6%. Furthermore, as the reaction temperature increases, the catalyst consistently exhibits high N 2 selectivity, maintaining values above 90% within the 100–300 °C range. The Mn-modified, NaOH alkaline fusion-activated catalyst shows enhanced stable adsorption of ammonia species, suppression of intermediate conversion to N 2 O, and improved N 2 selectivity. This work offers a viable approach for the high-value, sustainable utilization of rare earth tailings in environmentally friendly denitration technologies.
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ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2026
·Vol. 48
·期 6
·250
·
IF 4.3
Ma Chuang,Liu XueMei
Lead (Pb) and cadmium (Cd) in soil threaten agroecosystem safety and human health. Due to the high bioavailability and mobility of heavy metals in red soil, the risk is further increased. Biochar is widely used for heavy metal immobilization, but original biochar suffers from inherent limitations. Most existing studies of iron (Fe)–manganese (Mn) modified biochar have not focused on red soil, and the relationship with soil–plant responses remains unclear. This study aimed to evaluate and compare the efficacy of sugarcane bagasse biochar (BC) and Fe–Mn modified sugarcane bagasse biochar (FMBC) for Pb and Cd immobilization in red soil, and clarify their effect on plant uptake. BC and FMBC were applied to Pb and Cd contaminated red soil for pot experiments with pak choi ( Brassica rapa chinensis ) as an indicator plant. The results showed that both BC and FMBC elevated soil pH, organic matter (SOM), enzyme activities, reduced Pb and Cd bioavailability, and transformed Pb and Cd to stable fractions. FMBC outperformed BC, and the 5% FMBC treatment achieved the optimal remediation efficacy. The 5% FMBC decreased the acid-extractable Pb and Cd by 9.33 and 34.40% compared to control. The plant biomass was significantly increased, Pb and Cd content in edible shoots met the limit standards, and bioconcentration (BCF) and translocation factors (TF) were lowered. Overall, this study establishes theoretical foundations and empirical bases for the application of FMBC to immobilize Pb and Cd in red soils, thereby providing a feasible and eco-friendly approach to support sustainable agriculture and the recycling of agricultural waste.
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2026
·Vol. 41
·期 2
·353-363
·
IF 1.4
Yan Ming,Deng Yuxiao,Yan Zhuanlong,Li Hongyu,Cao Mengyang
This study reported the synthesis of magnetic solid solutions V 2 (A x B y Sn 1− x − y )C (where A and B are Mn, Fe, or Co) MAX phases. These materials were prepared by incorporating magnetic elements into the V 2 SnC MAX phase via pressure-less sintering at 1 000 °C for 3 hours. XRD analysis reveals that the composition with x = y = 0.2 exhibits a shift of diffraction peaks to higher angles, indicating lattice parameter changes, and achieves the highest phase purity with the maximum solid solution limit, further increases in the dopant content led to the formation of impurities. While the solid solution of magnetic elements preserves the characteristic layered structure of the MAX phase, it successfully induces magnetic properties. The magnetic transition temperatures for these solid solutions ranges from 61 to 200 K. Specifically, V 2 (Mn x Co y Sn 1− x − y )C demonstrated hard magnetic characteristics, with a high saturation magnetization (6.536 emu/g) and large remanence (4.236 emu/g). In contrast, V 2 (Mn x Fe y Sn 1− x − y )C and V 2 (Fe x Co y Sn 1− x − y )C exhibits soft magnetic behavior, evidenced by their narrow hysteresis loops and low coercivity. Their saturation magnetization values are 3.80 and 1.784 emu/g, respectively. The distinctly “S”-shaped hysteresis loop of V 2 (Fe x Co y Sn 1− x − y )C further confirms its soft magnetic nature.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Xiaobing Yao,Yuan Ruan,Ting Rao,Fangyou Lin,Wenbin Zhang
Prostate cancer is a prevalent immune-cold malignancy in which hypoxia and glutathione (GSH) enrichment hinder redox-dependent therapies and cuproptosis. A hyaluronic-acid–coated copper–manganese Prussian blue nanomedicine (Cu/Mn-PB@HA) was developed to remodel the tumor microenvironment (TME) and enhance mitochondria-associated cuproptosis. The multivalent Cu/Mn centers enable catalase-like O 2 generation, GSH-oxidase–like depletion of GSH, and Fenton-like ·OH production, which together enhance chemodynamic therapy (CDT) and create a favorable window for cuproptosis. In acidic and GSH-rich conditions, copper valence cycling initiates cuproptosis, whereas released Mn 2+ enhances CDT and activates the cGAS–STING pathway, thereby promoting dendritic-cell maturation and cytotoxic T-cell responses. The HA shell enables CD44-mediated enrichment, improving tumor accumulation without compromising biosafety. In vitro , the platform elevates ROS, induces mitochondrial depolarization, downregulates HIF-1α, and modulates cuproptosis-related proteins. Concurrently, immunogenic cell-death markers are elevated together with cGAS–STING signaling. In vivo , preferential tumor accumulation and significant tumor inhibition are achieved with favorable serum biochemistry and hepatic/renal histology. By integrating “oxygenation–desensitization–ROS” chemistry with Mn 2+ - enhanced immune activation, Cu/Mn-PB@HA provides a comprehensive strategy for treating immune-cold solid tumors and serves as a versatile platform for theranostic development.
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Green Energy & Environment
·
2023
·
IF 13.3
Changjian Yuan,Xianglei Liu,Xinrui Wang,Chao Song,Hangbin Zheng,Cheng Tian,Ke Gao,Nan Sun,Zhixing Jiang,Yimin Xuan,Yulong Ding
Solar thermochemical energy storage based on calcium looping (CaL) process is a promising technology for next-generation concentrated solar power (CSP) systems. However, conventional calcium carbonate (CaCO 3 ) pellets suffer from slow reaction kinetics, poor stability, and low solar absorptance. Here, we successfully realized high power density and highly stable solar thermochemical energy storage/release by synergistically accelerating energy storage/release via binary sulfate and promoting cycle stability, mechanical strength, and solar absorptance via Al–Mn–Fe oxides. The energy storage density of proposed CaCO 3 pellets is still as high as 1455 kJ kg −1 with only a slight decay rate of 4.91% over 100 cycles, which is higher than that of state-of-the-art pellets in the literature, in stark contrast to 69.9% of pure CaCO 3 pellets over 35 cycles. Compared with pure CaCO 3 , the energy storage power density or decomposition rate is improved by 120% due to lower activation energy and promotion of Ca 2+ diffusion by binary sulfate. The energy release or carbonation rate rises by 10% because of high O 2− transport ability of molten binary sulfate. Benefiting from fast energy storage/release rate and high solar absorptance, thermochemical energy storage efficiency is enhanced by more than 50% under direct solar irradiation. This work paves the way for application of direct solar thermochemical energy storage techniques via achieving fast energy storage/release rate, high energy density, good cyclic stability, and high solar absorptance simultaneously.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Qinghe Liu,Sen Wang,Fei Han,Shupei Lv,Daokui Li,Jing Ouyang
Manganese oxide has been recognized as one of the most promising gaseous heterogeneous catalysts due to its low cost, environmental friendliness , and high catalytic oxidation performance. The modulation of the interfacial coupling effect of manganese oxides by chemical means is considered a critical and effective way to improve the catalytic performance. Herein, a novel one-step synthetic strategy of highly-efficient ultrathin manganese-based catalysts is proposed through optimal regulation of metal/manganese oxide multi-interfacial coupling. Carbon monoxide (CO) and propane (C 3 H 8 ) oxidation are employed as probe reactions to investigate the structure-catalytic mechanism - catalytic performance relationship. The ultrathin manganese (Mn)-based catalyst exhibits superior low-temperature catalytic activity with a 90% conversion of CO/C 3 H 8 realized at 106℃ and 350℃. Subsequently, the effect of “interfacial effect” on the intrinsic properties of manganese oxides is revealed. The ultrathin appearance of two–dimensional (2D) manganese dioxide (MnO 2 ) nanosheets changes the binding force in the vertical direction, thus resulting in an increase in the average manganese-oxygen (Mn-O) bond length and exposing more surface defects . Besides, the introduction of Copper (Cu) species into the catalyst further weakens the Mn-O bond and promotes the generation of oxygen vacancies , which subsequently enhances the oxygen migration rate. This study provides new insights into the optimal design of transition metal oxide interfacial assemblies for efficient catalytic reactions .
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