APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Tongdong Shen,Wentao Su,Qiangqiang Yang,Jun Ni,Shaoping Tong
MgM x O y (M = Fe, Mn) powders prepared by the sol-gel method were used as the catalysts for ozonation of p -hydroxybenzoic acid ( p -HBA) and acetic acid (AcOH) (20 mg/L) at a neutral pH for 9 min. The study aims to bring an insight into the synergetic mechanism for basic and acid sites of MgM x O y in heterogeneous catalytic ozonation. 84.8 %, 88.2 %, 86.7 % p -HBA were removed by ozonation catalyzed by MgFe x O y , MgMn x O y and MgO, respectively. 49.3 %, 65.8 %, 64.3 % AcOH were removed by ozonation catalyzed by the three catalysts, respectively. MgMn x O y exhibited the highest catalytic activity in ozonation of p -HBA and AcOH owing to the action of acid sites of MgMn x O y for additional ozone decomposition. The increase of solution pH, the protonation of surface hydroxyl groups and the electron transfer on acid sites induce ozone decomposition into reactive oxygen species in MgM x O y catalytic ozonation.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Zhihao Wang,Mengxiao Zhang,Jiao He,Yongan Tang,Tingchao He,Qiang Sun,Dianyuan Fan,Yu Wang
The development of emitting materials that present both photoluminescence (PL) and X-ray excited optical luminescence has recently been attracting rising research interest for visualization applications. We introduced in this study the hydrothermally crystallized (Sr 1- x Mn x ) 5 (PO 4 ) 3 F 1- y Cl y ( x = 0–0.05, y = 0–0.40) nanorods with favorable PL and X-ray excited optical luminescence properties after composition modulating. The effects of solution pH and Cl − incorporation on structure and morphology of the products were firstly unveiled. (Sr 1- x Mn x ) 5 (PO 4 ) 3 F gives green emission at ∼548 nm ( 4 T 1 ( 4 G) → 6 A 1 ( 6 S)) under either 402 nm excitation or X-ray irradiation, and the optimal PL and X-ray excited optical luminescence were observed at x = 0.03. The replacement of F − by larger Cl − led to the generation of an amount of Frenkel defects (the dislocated F − and anion vacancies V F . ) along the c -axis, benefit from which the (Sr 0.97 Mn 0.03 ) 5 (PO 4 ) 3 F 1- y Cl y samples present enhanced PL and X-ray excited optical luminescence intensities by factors of 1.6 and 7.4, respectively, and the corresponding optimal y values are determined to be 0.20 and 0.30. Fluorescence decay analysis found steadily shortened fluorescent lifetime for Mn 2+ at higher Mn 2+ and Cl − concentrations, and the underlying mechanism was discussed. The (Sr,Mn) 5 (PO 4 ) 3 (F,Cl) apatite material, with enhanced PL and X-ray excited optical luminescence, may find novel applications for both lighting and scintillating.
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Catalysis Science & Technology
·
2022
·Vol. 12
·期 18
·5709-5722
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IF 6.177
Dongbo Wang,Xiyuan Dong,Ye Lei,Changqing Lin,Dan Huang,Xin Yu,Xuan Zhang
Photocatalytic degradation of pollutants is regarded as an economical and environmentally-friendly strategy. Herein, a hollow tubular carbon nitride photocatalyst co-doped with manganese and phosphorus (Mn–PCN) was synthesized by a one-step hydrothermal–calcination method and used for the photocatalytic degradation of organic pollutants. Introducing P shaped the tubular morphology, increased the specific surface area, and enhanced the light efficiency. Adding Mn narrowed the band gap, regulated the tubular morphology, and affected the electronic structure. Co-doping P and Mn enhanced the photocatalytic performance synergistically. Compared with pure carbon nitride (CN), the photocatalytic performance of Mn–PCN was greatly improved. Rhodamine B could be removed almost completely in 150 min with 3Mn–PCN, and the degradation rate constant k was 0.01924, which was 14 times that of CN. Meanwhile, 3Mn–PCN could remove 99% of tetracycline hydrochloride, 57% of bisphenol A, and 68% of sulfamethoxazole. The Mn–PCN structure was identified and the possible mechanism was proposed according to DFT calculation and experimental results. The results provide new insights into rational design of highly active catalysts with visible light sensitive activity.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Nana Wang,Yingchun Liu,Linglan Men,Ziyu Yang,Jiarui Liu,Guoliang Chai,Qing Li,Changlei Xia,Huan Xie
Amorphous Mn-doped RuSe 2 nanoparticles were deposited on the wood-derived hierarchical porous carbon support. • The optimized amorphous (Ru 0.67 Mn 0.33 )Se 2 catalyst requires only 299 mV to deliver 1 A cm −2 in 0.5 M H 2 SO 4 solution. • Ru–Mn electronic coupling enriches the electron density of Ru sites and enhances *H adsorption property. • In situ Raman spectra reveal the enriched population of free-H 2 O accelerating protons transfer. • A solar-powered overall water-splitting device achieves 7.95% STH energy efficiency with excellent stability. The surficial water structure in the electrode/electrolyte double layer governs the transfer rate of protons during the acidic hydrogen evolution reaction (HER). Herein, we introduce the novel strategy to alleviate the strong hydrogen-bonded water structure by doping Mn in the amorphous RuSe 2 nanoparticles deposited on wood-derived carbon for efficient acidic HER. The optimized amorphous (Ru 97.7 Mn 2.3 )Se 2 catalyst requires only 299 mV to deliver 1 A cm −2 in 0.5 M H 2 SO 4 electrolyte, which is comparable to that of the benchmarking commercial Pt/C (20 wt%), and maintains outstanding durability for 100 h at a current density of 100 mA cm −2 . Furthermore, an acidic photovoltaic-driven overall water-splitting system employing amorphous (Ru 0.67 Mn 0.33 )Se 2 catalyst as the cathode achieves a solar-to‑hydrogen energy conversion efficiency of 7.95%. In situ Raman spectra reveal that Mn incorporation reconstructs the interfacial water environment by alleviating the strong hydrogen-bonded interfacial water structure, thereby facilitating protons transfer. Density functional theory (DFT) calculations illuminate that Mn doping induces the upshifting of the d-band center of Ru in amorphous RuSe 2 , which leads to the optimized *H adsorption/desorption thermodynamics. These results demonstrate the synergistic effects of electronic structure regulation and interfacial water structure reconstruction on the amorphous (Ru 97.7 Mn 2.3 )Se 2 catalyst enabling the efficient acidic HER and solar-driven green hydrogen production. Download: Download high-res image (220KB) Download: Download full-size image
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2025
·
IF 6.3
Qingyang Mei,Hui Liu,Jinjia Wei
To address the challenges of structural degradation and low solar absorptivity in calcium-based thermochemical energy storage systems under high-temperature cycling, we propose a novel Mn/Al/Ce ternary-doped CaO composite (Ca10Mn1Al1Ce1) optimized for solar-driven calcium looping applications. Through a sol-gel synthesis strategy, the co-doping strategy synergistically integrates structural stabilization mediated by Ca 2 MnO 4 /Ca 3 Al 2 O 6 frameworks, carbonation kinetics enhancement through CeO 2 -induced oxygen vacancies, and Mn element doping, significantly improving the material's solar energy absorption performance. The optimized material demonstrates unprecedented cycling stability with only 5.6 % energy density decay over 200 cycles, outperforming pure CaO (73.5 % degradation after 100 cycles). Kinetic analysis reveals accelerated calcination rates enabled by Mn doping, while DFT calculations confirm an 18.3 % reduction in CaCO 3 decomposition energy barriers. Remarkably, the composite achieves a 3.9-fold enhancement in solar absorptivity through synergistic full-spectrum light harvesting. This work establishes a multifunctional doping strategy that simultaneously addresses sintering resistance, solar absorptance, and reaction kinetics, offering a promising pathway for next-generation concentrated solar power plants requiring high-temperature, long-cycle thermochemical energy storage.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Hongjie Chen,Yixuan Su,Yucong Chen,Minghan Bao,Mingjun Wu,Junyang Chen,Weitao Chen,Qiang Ru
The inherent low electronic conductivity of NASICON-type Na4MnV(PO4)3 (NMVP) impedes its use in advanced energy storage. Herein, we address this challenge by introducing a citric acid-derived carbon coating to elevate the material’s conductivity and electrochemical performance. By precisely tailoring the configuration of the carbon layer, we fabricated Na4MnV(PO4)3 encapsulated by a carbon coating (NMVP@C) and constructed a 3D hierarchical architecture with incorporated V(III) and Mn(II) states, which prompts the reversible redox reaction, augments Na+ storage capability, and mitigates volume expansion during cycling. The optimal cathode manifests superior rate capability and a long life span with 107.5 mA h g–1 at 1 C and 82.5% capacity retention over 5000 cycles at 20 C. The hard carbon//NMVP@C full cell confirms practical applicability with good electrochemical performance. This work underscores the pivotal interplay among the carbon layer, Na+ mobility, and structural integrity in NASICON cathodes, offering a pathway to develop high-performance and cost-effective cathode materials for sodium-ion batteries.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Wei Wang,Ruibo Wei,Qinghan Zhu,Ziming Fu,Ruixia Zhong,Haiwang Wang,Jian Qi
The greenhouse effect caused by direct emissions of lean methane from coal mining is 25 times greater than that of CO 2 . To reduce the methane content in the atmosphere, it is imperative to develop high-activity, stable, and low cost methane-catalyzed combustion catalysts. In this work, a series of Mn-doped Co 3 O 4 hollow nanocages with dodecahedral shape were prepared using the metal-organic framework (MOF) material ZIF-67 as a template, combined with an in-situ growth method and a high-temperature calcination process. The optimized hollow structure Mn 0.6 /Co 3 O 4 -H (T 90 = 302 °C) exhibited higher catalytic activity than the solid structure Mn 0.6 /Co 3 O 4 -S (T 90 = 387 °C). On the one hand, Mn 0.6 /Co 3 O 4 -H has abundant O ads /O latt (0.61) and high Co 3+ /Co 2+ (1.11) content, which increases the adsorption of reactive molecules. In addition, the adsorption of methane by the Mn 0.6 /Co 3 O 4 -H catalyst reached 0.77 cm 3 /g at 273 K, increasing the methane concentration inside the catalyst. Concurrently, the hollow structure also establishes fast mass and heat transfer channels, leading to a significant improvement in the catalytic performance. The new catalyst developed in this study provides a new perspective and insight for reducing methane emissions during coal mining and reducing its negative impact on the environment.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Shiju Yang,Xueshuang Yan,Fuzhi He,Zhuliang Chen,Kaizhu Chang,Wan Yang,Futing Xia,Jianjun Chen,Qiulin Zhang
Achieving remarkable activity in selective catalytic reduction of NO by NH3 (NH3-SCR) over CeO2-based catalysts was crucial for their industrial application but still faces a tough challenge, mainly owing to the insufficient acidity and overoxidation ability. Herein, the surface acidity and reducibility of CeO2 catalysts were finely tuned over Mn–W/CeO2 to efficiently eliminate NO and reveal the mechanistic origin of superior catalytic properties. Systematic surface and structure analyses revealed that Mn3O4 interacted with WO3 species in the possible form of Mn–O–W, which could enhance the dispersion of WO3 over the CeO2 surface. The resulting well-dispersed WO3 increased the concentration of both Brønsted acid sites and strong acid sites, effectively suppressing the generation of inactive nitrates and thus providing abundant catalytically active sites for the adsorption and activation of NH3. Importantly, the electron withdrawal from Mn by W atoms associated with the shortened Mn–O bond distance resulted in the appropriate reducibility over Mn–W/CeO2. Accordingly, the undesirable overoxidation of NH3 was weakened, thereby greatly increasing the high-temperature (250–400 °C) NH3-SCR activity. DFT calculations and detailed in situ DRIFTS analysis demonstrated that both “E–R” and “L–H” mechanisms contributed mainly to this superior performance.
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PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2026
·
IF 9.2
Siyuan Zheng,Bolin Li,Jun Wang,Shanshan Huang,Simiao Wu,Zihang Wang,Guoliang Bai
Levofloxacin (LEV) residues in water are refractory and ecotoxic, while heterogeneous catalytic ozonation (HCO) systems suffer from limited efficiency and insufficient anti-interference ability. To address this, a composite catalyst, Co–Mn/CTS@NZ, was fabricated by loading Co–Mn bimetallic oxides onto chitosan-modified natural zeolite through wet impregnation–calcination to target non-radical reactive oxygen species (ROS) regulation in HCO for enhanced LEV degradation and anti-interference. Under the optimized conditions (LEV 30 mg/L, O 3 5 mg/L, catalyst 5 g, pH 6.5), the system achieved 99.55% LEV removal and 55.52% mineralization in 60 min, outperforming single ozonation significantly. The catalyst exhibited excellent anti-interference performance and operated efficiently across various real water matrices, with negligible metal leaching. Quenching experiments and electron paramagnetic resonance confirmed that 1 O 2 was the primary ROS, with ·O 2 − and ·OH acting as supplementary radicals. Characterization revealed that abundant oxygen vacancies, metal valence cycles, and surface hydroxyl groups synergistically promoted ozone activation and targeted ROS generation. This study provides a low-cost, high-efficiency catalyst for LEV-contaminated water treatment and offers a theoretical basis for targeted ROS regulation in HCO technology—breaking the reliance of traditional HCO on ·OH and advancing the practical application of advanced oxidation in antibiotic pollution control.
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PubMed
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ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Yong Chen,Huiping Zeng,Jiaxin Xu,Sibo Fu,Yuliang Zhu,Fanxu Zeng,Luyao Teng,Jiahao Wu,Fanhao Meng,Dong Li,Jie Zhang
This work simplified the structure of waste iron-containing sludge from groundwater treatment plants to explore its mechanism of activating periodate(PI) for degrading organic pollutants in water. The pH during preparation was used to regulate the crystallinity and the doping of transition metal Mn in the precursor solution to prepare catalysts similar to the waste iron-containing sludge. Sulfadiazine (SDZ) was selected as the model contaminant, and it was found that the efficiency of the prepared catalyst to remove the contaminants was 100% in 10min by activating PI. Combining electrochemical and performance experiment results, it was found that the amorphous part of the material can optimize the electronic structure and enhance the electron transfer ability. However, Mn doping can also reduce the electron transfer resistance, and the synergistic effect of Fe-Mn bimetal occupied a more important part in the entire catalytic system. According to the results of Electron paramagnetic resonance (EPR) and quenching experiments, it was found that although a variety of free radicals were produced, the active substances that contributed the most were IO 3 • and 1 O 2 . The materials showed certain environmental adaptability in the subsequent experiments. This study provides theoretical support for removing organic pollutants from waste iron-containing sludge and provides some basic insights for bimetal synergistic activation of PI.
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JOURNAL OF COORDINATION CHEMISTRY
·
2023
·
IF 1.9
Xiao-Tong Song,Ying Zhou,Gui-Bao Liu,Hui-Chao Guan,Shu-Mei Yue
By single-crystal X-ray diffraction (XRD) analysis, five complexes, catena-[(µ-2,2-bis(4-carboxyphenyl)hexafluoropropane)-(2-(pyidin-2-yl)-1,3-benzothiazole)-aqua-zinc(II)] (1), catena-[(µ-2,2-bis(4-carboxyphenyl)hexafluoropropane)-(2-(pyidin-2-yl)1,3-benzothiazole)-aqua-cadmium(II)] (2), catena-[hepta(µ-2,2-bis(4carboxyphenyl)hexafluoropropane)-diaqua-bis(2-(pyidin-2-yl)-1,3-benzothiazole)-tri-manganes(II)] (3), catena-[(µ-benzene-1,2,4,5-tetracarboxylato)-(2-(pyidin-2-yl)-1,3benzothiazole)copper(II)] (4) and catena-[(µ-3-nitrobenzene-1,2-dicarboxylato)-(2-(pyidin-2-yl)1,3-benzothiazole)-aqua-zinc(II)] (5), were characterized in this research. In these five complexes, H2hfipbb = 2,2-bis(4-carboxyphenyl)hexafluoropropane, H4btec = 1,2,4,5-benzenetetracarboxylic acid, H2NPTA = 3-nitrophthalic acid and bpt = 2-(pyridin-2-yl)benzo[d]thiazole). Complexes 1 and 2 occur in the monoclinic system with space group C2/c, 4 and 5 occur in the monoclinic system with space group P21/c, and 3 occurs in the triclinic system with space group P-1. The interaction between CT-DNA (calf thymus DNA) and those complexes was examined using UV spectroscopic analysis, fluorescent spectroscopic analysis, circular dichroism spectroscopy (CD) and viscosity analysis. This research reveals that those complexes have strong ability to interact with DNA, and they all bind to DNA in an intercalation mode, thus affecting the structure of DNA. This binding mode can arise from the interaction between the benzothiazole metal complexes and DNA. Hence, we hope to provide some scientific research bases for studying benzothiazole complexes and designing new thiazole anticancer drugs.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 21.1
Yaxiong Zeng,Jie Yu,Beimeng Qi,Fang Tao,Xiaotian Yang,Yulin Wang,Xiaoguang Duan,Hailu Fu
Regulating the microenvironment of single-atom catalysts (SACs) is critical for steering ozone (O 3 ) activation toward selective on-demand reactive species generation. While first-shell coordination engineering modulates the center metal activity, it often disrupts the robust Mn-N 4 symmetry and thus compromises structural stability. Here, we developed atomically dispersed Mn-N 4 -S sites (S-MnN 4 ) that feature sulfur doping in the second coordination shell for catalytic ozonation and water pollutant degradation. Second-shell sulfur incorporation subtly elevated the d -band center and increased the spin state of Mn from low to intermediate, enhancing O 3 adsorption, dissociation and the preferred generation of high-valent Mn(IV)=O species. Consequently, S-MnN 4 achieved a 2.7-fold higher ozone utilization efficiency and double the turnover frequency versus pristine MnN 4 which catalyzed O 3 to primarily yield singlet oxygen. A continuous-flow system using a S-MnN 4 -packed column reactor demonstrated efficient chemical oxygen demand removal and exceptional durability over 170 h for the treatment of real-world wastewater. This work highlights second-shell coordination engineering as a feasible approach to overcome SAC activity-stability trade-off, advancing rational SAC design toward a sustainable environmental remediation.
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