CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Ziyi Wang,Yuqian Zhang,Chengping Li,Liang Wang,Ting Bian,Shitan Yan,Kuzmin Anton,Liuting Zhang
Incorporating solar steam generation with the hydrovoltaic effect presents a promising approach to concurrently addressing water scarcity and energy challenges. However, realizing a high water evaporation rate while simultaneously maintaining substantial electrical output in a single device remains a formidable obstacle. Here, this study presents a novel hydrovoltaic and galvanic effects-coupled evaporation platform (HGEP) for dual-function applications in freshwater production and electricity generation from seawater. Coating urchin-like Mn-doped Co 3 O 4 on inclined nickel foam (NF), the system achieves a stable evaporation rate of 1.77 kg m −2 h −1 in 3.5 wt% brine under 1 kW m −2 irradiation with a 30° tilt angle. The inclined structure facilitates unidirectional ion transport by establishing a salinity gradient, effectively preventing salt deposition for up to 8 h. Moreover, integrating Zr-Al electrodes effectively combines the hydrovoltaic and galvanic effects, enabling the HGEP to deliver a stable open-circuit voltage of 1.0 V and a short-circuit current of 1.5 mA—over an order of magnitude higher than the pure hydrovoltaic effect (0.49 V, 0.15 mA)—and achieve a maximum power density of 0.8 W m −2 . This study presents an innovative solar-powered water treatment technology that simultaneously achieves water production and power generation
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高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 46
·17265-17274
·
IF 4.39
Yun-Wu Li,Shi-Kun Su,Cai-Zhen Yue,Jun Shu,Peng-Fang Zhang,Fang-Hui Du,Su-Na Wang,Hui-Yan Ma,Jie Yin,Xin Shao
Electrochemical water splitting is convinced as one of the most promising solutions to combat the energy crisis. The exploitation of efficient hydrogen and oxygen evolution reaction (HER/OER) bifunctional electrocatalysts is undoubtedly a vital spark yet challenging for imperative green sustainable energy. Herein, through introducing a simple pH regulated redox reaction into a tractable hydrothermal procedure, a hierarchical Fe3O4@MnOx binary metal oxide core–shell nano-polyhedron was designed by evolving MnOx wrapped Fe3O4. The MnOx effectively prevents the agglomeration and surface oxidation of Fe3O4 nano-particles and increases the electrochemically active sites. Benefiting from the generous active sites and synergistic effects of Fe3O4 and MnOx, the Fe3O4@MnOx-NF nanocomposite implements efficient HER/OER bifunctional electrocatalytic performance and overall water splitting. As a result, hierarchical Fe3O4@MnOx only requires a low HER/OER overpotential of 242/188 mV to deliver 10 mA cm−2, a small Tafel slope of 116.4/77.6 mV dec−1, combining a long-term cyclability of 5 h. Impressively, by applying Fe3O4@MnOx as an independent cathode and anode, the overall water splitting cell supplies a competitive voltage of 1.64 V to achieve 10 mA cm−2 and super long cyclability of 80 h. These results reveal that this material is a promising candidate for practical water electrolysis application.
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2021
·
IF 4.051
Zhihao Chen,Haiyang He,Zhuoqi Wen,Zhongjie Cui,Shiliang Mei,Dan Yang,Xian Wei,Wanlu Zhang,Fengxian Xie,Bobo Yang,Ruiqian Guo
Broadband emission Mn 2+ doped lead halide perovskites are deemed as promising phosphor materials for solid state white light-emitting-diodes (WLEDs). Herein, we report a facile gram-scale synthesis of Mn-doped CsPb(Br/Cl) 3 phosphors by doping MnCl 2 into CsPbBr 3 perovskite nanocrystals at room temperature. The obtained phosphors present dual-color emission with blue emission at 463 nm and red emission at 602 nm. Increasing MnCl 2 doping amount can enhance the red emission while more 3-Aminopropyltrimethoxysilane (APTMS) ligands can repress Mn related impurity and provide high stability. Further, two kinds of WLEDs (monocomponnet and two-component) are demonstrated. The monocomponent WLED exhibits warm white light under various driving currents (30 mA–150 mA), and the two-component WLED shows good chromatic performance close to ideal white light (0.33, 0.33), demonstrating their potential applications in WLED devices.
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高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Yang Tao,Qing Liu,Yujiao Guo,Mingwu Xiang,Xiaofang Liu,Wei Bai,Junming Guo,Shulei Chou
Electrochemical properties of spinel LiMn 2 O 4 cathode material have been always suffered from Mn dissolution and Jahn-Teller distortion. Herein, various Ni/B dual-doped LiNi 0.08 B x Mn 1.92- x O 4 ( x = 0–0.15) with a truncated octahedral morphology are synthesized via a facile solid-state combustion. The effects of Ni/B co-doping on the morphology, crystal structure, Mn dissolution, Li + diffusion coefficient and activation energy are investigated. Due to the relatively high Ni–O and B–O bond energy than that of Mn–O bond, the structure stability of the LiMn 2 O 4 is enhanced, whilst restraining the Jahn-Teller distortion. The LiNi 0.08 Mn 1.92 O 4 shows (111), (110) and (100) facets. In comparison, the B-doping endows the LiNi 0.08 B x Mn 1.92- x O 4 ( x ≥ 0.02) with (111) and (100) facets. This morphology evolution without (110) facets effectively inhibits the Mn dissolution. Owing to the synergistic merits of Ni/B dual-doping and unique truncated octahedron , the optimized LiNi 0.08 B 0.06 Mn 1.86 O 4 delivers an initial discharge capacity of 113.9 mAh∙g −1 at 1C and maintains a durable cycling life up to 2000 cycles at 5C. Even at 20C, a capacity retention of 86.3% is still obtained after 2000 cycles. Furthermore, a capacity retention of 70.6% can be retained after 500 cycles at 5C and 55 °C. The truncated octahedral LiNi 0.08 B x Mn 1.92- x O 4 with excellent electrochemical performance will be a good candidate for developing long-life lithium-ion batteries.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2025
·
IF 6.3
Xiaodao Liang,Yaorong He,Chao Xiong,Hongbing Ji,Yan Yang
Background Oxygen activation is a critical step in oxidation reactions for energy conversion and fine chemical synthesis, with its efficiency directly determining catalytic performance and industrial applicability. The main challenges are the high activation energy barriers and low target product selectivity caused by the inherent inertness of molecular oxygen. To address these issues, this study draws on the advantages of biomimetic catalysis using metal porphyrins and synthesizes a series of porphyrin-based organic polymers (Metal-Por-POPs) to achieve efficient aerobic epoxidation of olefins. Method A series of metalloporphyrin-based organic polymers were synthesized and thoroughly characterized using techniques such as SEM, XRD, and XPS. The catalytic performance was systematically evaluated under various conditions, including catalyst types, oxidant amount, reaction time, and temperature. Significant finding Using Mn-Por-POP as a catalyst, isobutylene was converted to the corresponding epoxide within 1 h at room temperature with a selectivity of up to 96.4 %. The catalyst also demonstrated excellent recyclability and broad substrate adaptability, maintaining over 96 % epoxide selectivity after five consecutive reaction cycles. Mechanistic studies via EPR and HRMS revealed that Mn-Por-POP promoted the generation of acyl radicals from isobutyraldehyde under aerobic conditions. These radicals subsequently reacted with molecular oxygen to form acylperoxy radicals, which facilitate the highly selective epoxidation of alkenes.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Chen Yu,Dawei Liang,Chao Qu,Na Ren,Qinghao Wu,Xiaohu Li,Jingjing Yao
Electro-oxidation is a promising technology for treating refractory organic pollutants in landfill leachate but faces challenges of high energy consumption and inefficient degradation of complex organics. This study introduces a manganese single-atom catalyst (MnSAC) doped on carbon nanotubes (CNTs) within a gas-diffusion electrode to enhance electro-oxidation performance. The bifunctional catalyst simultaneously promotes 2e oxygen reduction reaction for H 2 O 2 generation and in-situ activation of H 2 O 2 to produce reactive oxygen species, primarily hydroxyl radicals ( • OH). In a system employing a Ni-Sb-SnO 2 anode and operating under the operation conditions (initial chemical oxygen demand: 478 mg L 1 ; electrolyte: 0.1 mol L 1 Na 2 SO 4 , current density: 10 mA cm 2 , volume: 100 mL), a 90% removal rate (reduced to 49 mg L 1 ) was achieved. The core innovation lies in the unique N-coordinated MnSAC (Mn-N 4 ) sites on CNTs, identified via Density Functional Theory calculations to exhibit ΔG of −3.46 eV for H 2 O 2 activation and organic adsorption. The Mn-N-C structure modulates the d-band center to optimize electron/charge distribution and transfer. This synergistic design: 1) enhances H 2 O 2 activation and radical generation, 2) accelerates organic pollutant adsorption/degradation, and 3) improves reaction kinetics. The catalyst addresses critical issues like metal leaching and energy inefficiency, offering a robust, sustainable solution for refractory organic wastewater treatment.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Hongrun Qiu,Jianwei Li,Li Han,Guangqin Zhu,Min Lei,Xinhe Yang,Guofeng Jia,Min Wang
Cobalt-free manganese-based layered oxides such as LiNi 0.5 Mn 0.5 O 2 are promising cathodes for next-generation high-energy-density lithium-ion batteries owing to their high theoretical capacity. However, their structural instability in highly delithiated states leads to considerable degradation of both the surface and bulk phases during cycling, limiting their applicability. To address this structural instability, a “pinning” and “pillaring” strategy via titanium doping is proposed herein. Titanium ions act as “pillars” in highly delithiated states in the bulk structure, enhancing phase transition reversibility during cycling. In situ and ex situ X-ray diffraction analyses confirm that Titanium doping stabilizes the bulk structure within 3.0–4.8 V at room temperature. X-ray photoelectron spectroscopy reveals that Titanium ions form a “cationic barrier” at the surface, anchoring lattice oxygen and suppressing undesired phase transformations. This dual mechanism endows the 3 % Titanium-doped material with excellent cycling stability. It exhibits an initial discharge capacity of 157.7 mA h g −1 at C/2 and retains 83.45 % of this capacity after 120 cycles. This represents a 24.17 % increase in initial capacity and a 41.30 % improvement in capacity retention compared to those of undoped LiNi 0.5 Mn 0.5 O 2 . The voltage decay rate of the doped material also reduces to 1.64 mV per cycle, indicating a 90.24 % improvement. The proposed approach is a viable strategy for advancing Cobalt-free manganese-based layered oxides for use in high-energy-density lithium-ion batteries.
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 7
·3068
·
IF 4.6
Yuanyuan Ma,Wanting Liu,Zhifang Li,Yuhang Sun,Mingyuan Shi,Zheng Nan,Ruotong Song,Liying Wang,Jingqi Guan
TS-1 zeolite with desirable pore structure, an abundance of acidic sites, and good thermal stability promising as a support for the selective catalytic reduction of NO with NH3(NH3-SCR). Herein, a series of Mn–Fe/TS-1 catalysts have been synthesized, adopting tetraethylenepentamine (TEPA) as a metal complexing agent using the one-pot hydrothermal method. The introduced TEPA can not only increase the loading of active components but also prompts the formation of a hierarchical structure through decreasing the size of TS-1 nanocrystals to produce intercrystalline mesopores during the hydrothermal crystallization process. The optimized Mn–Fe/TS-1(R-2) catalyst shows remarkable NH3-SCR performance. Moreover, it exhibits excellent resistance to H2O and SO2at low temperatures. The characterization results indicate that Mn–Fe/TS-1(R-2) possesses abundant surface Mn4+and Fe2+and chemisorbed oxygen, strong reducibility, and a high Brønsted acid amount. For comparison, Mn–Fe/TiO2displays a narrower active temperature window due to its poor thermostability.Keywords:Mn-Fe/TS-1;one-pot synthesis;NH3-SCR;metal complexing;resistance to H2O and SO2
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高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jisheng Liang,Hengquan Yang,Chengyan Liu,Lei Miao,Junliang Chen,Sijing Zhu,Zhengchuan Xie,Wenjing Xu,Xiaoyang Wang,Jun Wang,Biaolin Peng,Kunihito Koumoto
Mg3Sb2-based compounds by virtue of nontoxicity and low-cost have become a promising class of candidates for midtemperature thermoelectric power generation. Here, we successfully fabricated n-type Mg3Sb2-based materials using an inexpensive and efficient approach of one-step ball milling and spark plasma sintering, and demonstrate that a complementary and favorable effect of multiple elements coalloying/-doping leads to an excellent thermoelectric performance. The intrinsic p-type conducting behavior for Mg3Sb2 could be changed to n-type through Bi and Se coalloying on Sb sublattices with excess Mg, resulting from the suppression of Mg vacancies and the formation of Mg interstitial. Furthermore, Mn doping on Mg sublattices could soften the chemical bonds, leading to the increase of carrier mobility and concentration simultaneously. Additionally, multielement coalloying/-doping could significantly increase the lattice disorder, which undoubtedly strengthens the phonon scattering and readily results in a suppressed lattice thermal conductivity. As a result, a highest ZT value of 1.6 at 723 K and an average ZT value up to 1.1 were obtained in the temperature range of 323–723 K in the Mg3.18Mn0.02Sb1.5Bi0.49Se0.01 sample, which is one of the highest values among the Te free Mg3Sb2. This work could give guidance for improving the thermoelectric performance of Zintl phase materials or even others using the multielement codoping/-alloying strategy.
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高影响因子
International Journal of Environmental Research and Public Health
·
2019
·Vol. 16
·期 8
·1439
·
IF 2.468
Yue Teng,Ke Yao,Wenbin Song,Yongjun Sun,Haoliang Liu,Zhiying Liu,Yanhua Xu
Cu-Mn-Ce@γ-Al2O3was prepared by incipient wetness impregnation and used to catalyze ozonation in a coal chemical wastewater-biotreated effluent. The preparation factors that considerably affected the catalytic performance of Cu-Mn-Ce@γ-Al2O3, specifically metal oxide loading percentage, calcination temperature, and calcination time, were examined. The catalyst was characterized by scanning electron microscopy, energy dispersive spectrometry, X-ray diffraction, and Brunauer-Emmett-Teller analysis. The optimal catalytic ozonation operating parameters, such as ozone dosage, catalyst dosage, pH, and reaction time, were also investigated. Results showed that an optimized catalyst consisted of 17.0% CuO, 3.0% MnO2, and 2.0% CeO2(wt.%). The optimal calcination temperature and calcination time were 600 °C and 5 h. The optimal catalytic ozonation operating parameters, including ozone dosage, catalyst dosage, pH, and reaction time, were 7, 80.0 mg/L, 20.0 mg/L, 7 and 50 min, respectively. The COD removal of biotreated effluent increased to 61% under these optimal operating conditions. Meanwhile, ozonation alone resulted in only 20% removal. This work proposes the use of easily available Cu-Mn-Ce@γ-Al2O3catalyst and might drive the advancement of catalytic ozonation for chemical wastewater purification.Keywords:catalyst;catalytic ozonation;coal chemical wastewater;advanced treatment
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高影响因子
Magnetochemistry
·
2025
·Vol. 11
·期 6
·49
·
IF 2.5
Yujie Zhou,Yuzhe Fu,Xiaoxue Niu,Bohan Wu,Xinghan Liu,Fu Hao,Zichuan Ma,Hao Cai,Yuheng Liu
Antibiotic resistance has been recognized as a global threat to human health. Therefore, it is urgent to develop effective strategies to address the contamination of water environments caused by antibiotics. In this study, Fe/Mn bimetallic-modified biochar (FMBC) was synthesized through a one-pot oxidation/reduction-hydrothermal co-precipitation method, demonstrating an exceptional photocatalytic-Fenton degradation performance for oxytetracycline (OTC). Characterization techniques including FTIR, SEM, XRD, VSM, and N2adsorption–desorption analysis confirmed that the Fe/Mn bimetals were successfully loaded onto the surface of biochar in the form of Fe3O4and MnFe2O4mixed crystals and exhibited favorable paramagnetic properties that facilitate magnetic recovery. A key innovation is the utilization of biochar’s inherent phenol/quinone structures as reactive sites and electron transfer mediators, which synergistically interact with the loaded bimetallic oxides to significantly enhance the generation of highly reactive ·OH radicals, thereby boosting catalytic activity. Even after five recycling cycles, the material exhibited minimal changes in degradation efficiency and bimetallic crystal structure, indicating its notable stability and reusability. The photocatalytic degradation experiment conducted in a Fenton-like reaction system demonstrates that, under the conditions of pH 4.0, a H2O2concentration of 5.16 mmol/L, a catalyst dosage of 0.20 g/L, and an OTC concentration of 100 mg/L, the optimal degradation efficiency of 98.3% can be achieved. Additionally, the pseudo-first-order kinetic rate constant was determined to be 4.88 min−1. Furthermore, this study elucidated the detailed degradation mechanisms, pathways, and the influence of various ions, providing valuable theoretical insights and technical support for the degradation of antibiotics in real wastewater.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Renwei Zhang,Qinmao Wu,Ping Hu,Mingwei Hu,Jianbin Zheng,Mingdeng Wei,Yafeng Li
Li-rich Mn-based layered oxides (LRMOs) are promising high-energy-density cathode materials for lithium-ion batteries due to their unique anionic/cationic redox mechanisms. However, a series of serious issues including irreversible oxygen release, structural degradation and sluggish kinetics significantly hinder their practical applications. Herein, a dual-functional B/Al co-doping strategy was proposed to synergistically address these challenges. It was found that the robust B − O and Al − O bonds can effectively stabilize the structural framework, mitigating irreversible oxygen release and phase transitions. Concurrently, B-doping optimized Li + transport channels while co-doping induced the formation of surface oxygen vacancies, thereby enhancing Li + transport kinetics. Based the synergistic effects, the electrochemical properties of LRMOs have been improved. As a result, Li 1.2 Mn 0.56 Ni 0.2 B 0.02 Al 0.02 O 2 cathode delivered an initial capacity of 256.8 mAh g −1 at 0.1C and retained 85.1 % of capacity after 500 cycles at 1C, which are much better than pristine and single-doped counterparts. Moreover, the voltage decay rate has been minimized to 0.96 mV cycle −1 , demonstrating an exceptional structural reversibility. Thus, such a work highlights the critical role of synergistic cation co-doping in balancing structural stability and ion transport, offering a viable pathway for developing high-energy and long-life Li-rich cathodes.
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高影响因子
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