COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Yang Zhang,Hanjun Wu,Zhenyue Zhang,Wenda Guo,Junxia Yu,Rongying Zeng,Ruan Chi,Zhiquan Pan
In this work, Ca-Al LDHs were modified via co-precipitation method utilizing two distinct chemical forms of adipic acid (adipate salt and adipic acid) as intercalation agents, with the resulting materials denoted as At-LDHs (adipate-intercalated LDHs) and Aa-LDHs (adipic acid-intercalated LDHs). The results indicated that At-LDHs and Aa-LDHs all exhibit a sheet-like porous structure stacked with each other. Due to the different synthesis conditions, the sheet structure of Aa-LDHs is smaller than that of At-LDHs. The kinetic and isotherm simulation results indicated that the capture capacity of At-LDHs for Mn 2 + was up to 227.53 mg·g −1 when the pH value was 7, while that of Aa-LDHs for naphthol green B reached to 132.73 mg·g −1 at a pH value of 9. The kinetic and thermodynamic simulation results indicated that the capture of Mn 2+ by At-LDHs conformed to the pseudo-first-order kinetic model and the Langmuir isotherm model, and the capture of naphthol green B by Aa-LDHs conformed to the Elovich kinetic model and the Temkin isotherm model. In addition, the capture process of both was a spontaneous exothermic reaction. Benefiting from the excellent adsorption properties of At-LDHs composites (Ion exchange, electrostatic attraction, adsorption precipitation, functional group chelation), the adsorption effect on Mn 2+ was better. Aa-LDHs have good adsorption effect on naphthol green B in solution through electrostatic attraction, dipole-dipole hydrogen bond, Yoshida hydrogen bond and n-π interaction. At-LDHs and Aa-LDHs have great potential to be employed as the materials for the removal of organic and inorganic composite pollutants from wastewater.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Zhangyan Zhou,Wenshuo Ma,Mengjin Hong,Beiyue Ma,Chuanbo Hu
The application of superhydrophobic coatings on carbon steel (CS) surface represents an effective strategy for mitigating corrosion in these materials. This study presents the preparation of superhydrophobic Ni/Mn-TiO 2 composite (SNMT) coatings on CS substrates through a facile one-step electrodeposition technique. The formation mechanism of SNMT coatings was meticulously analyzed under varying conditions of nanoparticle types and concentration levels. The inclusion of TiO 2 nanoparticles, with an optimal additive concentration of 1 g, facilitated the formation of numerous low surface energy, cauliflower-like microstructures on CS interface. Surprisingly, the results indicate that SNMT coatings maintained commendable superhydrophobicity even post-exposure to superficial damages such as tape peeling, sandpaper wear, and knife-scratch, as evidenced by a static contact angle (CA) exceeding 158° and a sliding angle (SA) below 2°. Furthermore, the corrosion inhibition efficacy of SNMT coatings was quantitatively assessed via dynamic potential polarization curves in a simulated seawater environment. The results demonstrated that SNMT coatings exhibited excellent corrosion inhibition performance in simulated seawater solution, with a protection efficiency (PE) reaching 96.5 %. In conclusion, superhydrophobic surfaces can effectively inhibit the penetration of corrosive liquids. The durability and robustness of such superhydrophobic surfaces advocate for their potential widespread application in enhancing the longevity and reliability of CS in corrosive environments.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yi Shi,Jian Sun,Yun Long,Ruilin Wang,Zijian Zhou,Long Jiang,Chuanwen Zhao
Calcium Looping (CaL) is a noteworthy high-temperature thermochemical energy storage technology applied in the Concentrated Solar Power (CSP), given its considerable theoretical heat storage density and the low-cost raw materials. The inherent poor solar absorptance to CaO-based materials, however, limit their use in volumetric collectors that operate in direct solar-driven heat storage mode. This research implements a collaborative strategy of external Mn-doping and internal Al-loading to fabricate CaO-based composite pellets using a hydrophobic-assisted casting method. The fabricated pellets, featuring a “black exterior, white interior” design, achieve both good light absorption and stable heat storage/release capabilities. The findings reveal that incorporating a hydrophobic layer with 60 wt% MnO 2 is advantageous for preserving the structural integrity of the Mn-based outer shell and for the elevation of its optical absorption capability. Therefore, the solar absorbance of the proposed Al-stabilized CaO-based composite pellets with a dark Mn-based shell is 86.39 %, and their compressive strength is 9.38 MPa, which is notably higher than the shell-free pure CaO-based pellets (19.36 %, 0.6 MPa). Moreover, after 40 cycles, the energy storage density of the preferred CaO-based composite pellets has increased by 44.3 % compared to the initial cycle, achieving 1.07 MJ/kg. The desirable “self-reactivation” phenomenon is primarily attributed to the synergistic co-evolution of the outward soft skeleton and the inward hard skeleton within the CaO-based composite pellets, which helps maintain a stable pore structure and accelerates the carbonation rate during high-temperature cycles.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
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IF 5.4
Jian Gao,Xinrui Dai,Zhenhua Gu,Guixian Deng,Jiangyong Yuan,Kongzhai Li
Catalysts loaded with metal oxides of M (M = Mn, Co, Ce) were synthesized by deposition precipitation method using cold rolled sludge (iron oxide as the main component) as a raw material for the selective catalytic reduction of NO x by ammonia (NH 3 -SCR). Among the various formulations, the co-supported catalyst containing 5 % Mn and 5 % Co on CRS-400 exhibited exceptional SCR performance, achieving over 90 % conversion of NO x from 80 °C to 200 °C. The addition of 5 % Mn and 5 % Co as active components resulted in an increase in the specific surface area for catalytic performance and an enhancement of the redox capacity, leading to a significant improvement in catalyst activity. The catalyst’s efficient denitration performance was attributed to the synergistic interaction between Mn, Co, and Fe oxides, resulting in a catalyst with a higher proportion of adsorbed oxygen, as well as an elevated composition of Mn 4+ and Fe 2+ species. The catalyst demonstrated excellent SCR activity at low-temperatures, indicating its potential for downstream applications in soot treatment equipment. This would achieve the dual benefits of purifying the atmosphere and disposing of solid waste.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Jiaqi Li,Yuxi Zhang,Hanhao Liang,Jiaming Li,Xiao Yu,Jianglin Wang,Yini Long,Zhanhong Yang
Manganese oxide is a promising cathode material for rechargeable batteries due to its high theoretical specific capacity. However, its practical application is hindered by its poor conductivity and rapid capacity decay caused by Jahn-Teller distortion during charging and discharging. This work introduces Na 2 EDTA during the synthesis of Mn O 2 , and the amino group is introduced by adsorption to deposit to form N-doped Mn O 2 . Alkaline N-doped Mn O 2 battery upshifts the d-band center of Mn, improves the conductivity of Mn O 2 and the formation energy of O vacancies during the charge-discharge process, and suppresses Jahn Teller distortion. As a result, N-doped Mn O 2 achieves a high capacity of up to 197mAh g −1 and excellent capacity retention of 94.2% over 250 cycles with slower voltage decay. This strategy enables the material with high cycling performance for single-electron discharge secondary alkaline manganese batteries.
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PubMed
高影响因子
Materials Today Nano
·
2024
·
IF 8.2
Asim Arshad,Brundha Chidambaram,Abdullah Nasir,Tianxiang Yang,Menglong Sun,Nosheen Zafar,Sining Yun
Constructing multicomponent electrocatalysts towards efficient energy conversion is widely adopted strategy, in this regard, high performance metal/nonmetal codoped carbon electrode materials have attained great consideration. Still, the electroacatalytic susceptibility, abundant intrinsic active sites, and stable electrochemical performance in different electrolytes are considered as underline challenges, which can be addressed by rational structural modifications to build a hybrid electroactive material. In this work, unique Sn based multicomponent carbon nanospheres are firstly developed as highly efficient bi-functional electrocatalysts in solar cells and hydrogen evolution. The designed electrocatalysts feature the combined effect of dispersed bimetal active sites and sufficient nitrogen components within spherical carbon framework, which readily enhanced the charge transfer rate via multiple channels, boosting the triiodide reduction reaction (IRR) and hydrogen evolution reaction (HER). As a result, solar cell with Mn/Sn-NC based counter electrodes (CEs) exhibited an excellent power conversion efficiency (PCE) of 8.39 %, outperforming Pt (7.67 %). Moreover, superior HER kinetics are also demonstrated by Mn/Sn-NC with a small overpotential of 127.8 mV at 10 mA cm −2 and tafel slope of 77 mV dec −1 . The rational design of the carbon nanospheres with MnSn 2 bimetal nanoparticles and N doping promotes a high electrochemically active surface area, low charge-transfer resistance, excellent electrochemical stability, and superior electrocatalytic activity, providing a promising route to construct highly efficient materials towards multiple energy conversion applications.
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Journal of Cleaner Production
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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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Journal of Environmental Chemical Engineering
·
2024
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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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NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 35
·15470-15482
·
IF 2.7
Qingtao Wang,Xiaoling Zhou,Hanbin Jin,Lulu Guo,Yanxia Wu,Shufang Ren
As one of the effective methods for hydrogen production, water electrolysis has been widely studied. However, the high overpotential challenge faced by the anode and the limitation of the electron transfer rate in this process significantly inhibit the efficiency of hydrogen production, which has become the main obstacle to overcome in the current research. The use of thermodynamically more favorable organic compounds to oxidize at the anode instead of traditional water oxidation (OER) is an effective strategy to optimize the process of electrolytic hydrogen production. In this paper, Ni3S2 catalysts co-doped with non-noble metals Li and Mn were prepared on nickel foam and used for the glycerol oxidation reaction (GOR) coupled with the hydrogen evolution reaction (HER). In alkaline solution, Li, Mn–Ni3S2@NF exhibits good GOR and HER performance. Specifically, overpotentials of 1.58 V vs. RHE and 0.54 V vs. RHE are required to reach a current density of 200 mA cm−2, respectively, and the catalytic performance of the material remains good after a long-term test. Li, Mn–Ni3S2@NF as a bifunctional catalytic material oxidizes glycerol to formate, and its faradaic efficiency (FE) is as high as 91%, and the volume of hydrogen production is close to the theoretical value. In addition, the replacement of the OER by the GOR can reduce the energy consumption by about 17.44%.
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CHEMISTRY-A EUROPEAN JOURNAL
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2010
·Vol. 16
·期 43
·12988-12994
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IF 5.382
He-Fang Wang,Yan Li,Ye-Yu Wu,Yu He,Xiu-Ping Yan
Graphical Vitamin see : The chelating ability of ascorbic acid (AA) enables the extraction of Mn and Zn from the surface of tripolyphosphate-capped Mn-doped ZnS quantum dots (QDs) generating more holes that are subsequently trapped by Mn 2+ . The reducing property of AA results in the reduction of Mn 3+ to Mn 2+ in an excited state, thus enhancing the excitation and orange emission of the QDs (see scheme). Such AA-induced phosphorescence enhancement enables selective detection of AA with a detection limit of 9 n M . Although quantum dot (QD)-based room temperature phosphorescence (RTP) probes are promising for practical applications in complex matrixes such as environmental, food and biological samples, current QD-based-RTP probes are not only quite limited but also exclusively based on the RTP quenching mechanism. Here we report an ascorbic acid (AA) induced phosphorescence enhancement of sodium tripolyphosphate-capped Mn-doped ZnS QDs, and its application for turn-on RTP detection. The chelating ability allows AA to extract the Mn and Zn from the surface of the QDs and to generate more holes which are subsequently trapped by Mn 2+ , while the reducing property permits AA to reduce Mn 3+ to Mn 2+ in the excited state, thereby enhancing the excitation and orange emission of the QDs. The enhanced RTP intensity of the QDs increases linearly with the concentration of AA in the range of 0.05–0.8 μ M . Thus, a QD-based RTP probe for AA is developed. The proposed QD-based turn-on RTP probe avoids tedious sample pretreatment, and offers good sensitivity and selectivity for AA in the presence of the main relevant metal ions and other molecules in biological fluids. The limit of detection (3 s ) of the developed method is 9 n M AA, and the relative standard deviation is 4.8 % for 11 replicate detections of 0.1 μ M AA. The developed method is successfully applied to the analysis of real samples of human urine and plasma for AA with quantitative recoveries from 96 to 105 %.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Zhenkai Wang,Yifan Li,Yanfang Su,Sheng-Peng Sun,Xiaoning Wang,Zhangxiong Wu,Winston Duo Wu,Xiao Dong Chen
Catalytic membrane integrating membrane filtration and advanced oxidation in one single-step is promising in addressing emerging micropollutants issue in water, the challenges in catalytic activity and stability still limit their practical application. This study successfully anchored highly stable Fe–Mn bimetallic catalyst (FMBC) in Al 2 O 3 -based microfiltration and ultrafiltration ceramic membranes channel (named as FMBC@Al 2 O 3 -MF or UF) via a novel in situ fabrication strategy. Characterization results revealed that FMBC was anchored on the membrane channel wall of Al 2 O 3 -MF/UF, which enabled boosting Oxone activation to generate sulfate radical and hydroxyl radical at circumneutral pH (e.g., 7.0–9.0) and with great stability. Notably, FMBC@Al 2 O 3 -UF exhibited a remarkable activity and anti-interference capability in actual water matrices, which resulted in efficient degradation of emerging micropollutants such as carbamazepine, crotamiton, diethyltoluamide, gemfibrozil and ibuprofen in lake water and municipal wastewater treatment plant secondary effluent at environmentally relevant concentrations. Moreover, FMBC@Al 2 O 3 -MF/UF also displayed high cleaning efficiency toward natural organic matter (NOM) and effluent organic matter (EfOM) fouling via Oxone activation. Besides, the intermediates of carbamazepine degradation were identified, and most of them had decreased aquatic toxicity based on Ecological Structure Activity Relationship (ECOSAR) prediction. The high activity, stability and environmentally friendly property of the as-prepared FMBC@Al 2 O 3 -MF/UF make them promising application for advanced treatment of emerging micropollutants in water.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2025
·Vol. 27
·期 2
·1-15
·
IF 2.6
Hui Xianghe,Fang Dong,Wang Guifang,Ran Feng,Zhang Xin,Fu Zewei,Ruzimuradov Olim
Perovskite hydroxystannate (MSn(OH) 6 ) has garnered considerable interest in recent years as a novel flame retardant characterized by its low toxicity and environmentally benign properties. In order to improve the flame retardancy and smoke suppression properties of epoxy resin (EP) matrices, transition metal hydroxystannate (MSn(OH) 6 , M = Fe, Co, Mn) was prepared by a ultrasonic-coprecipitation method and used as flame retardants. The synthesized composites were assessed for their flame retardant characteristics and mechanical properties through the measurement of the limiting oxygen index (LOI), the cone calorimetry test (CCT), and universal tensile testing. Upon the incorporation of 10 wt% of the MSn(OH) 6 flame retardants, the flame retardant of EP composites exhibited marked enhancement, especially manganese hydroxystannate (MHS). Compared with pure EP, the EP/MHS-10 composite demonstrated the best performance, reducing the peak of heat release rate (pHRR), total heat release (THR), total smoke production (TSP) by 60.0%, 14.4%, and 32.6%, respectively. During the process of combustion, the decomposition of MSn(OH) 6 results in the generation of non-flammable gases and water vapor. In the condensed phase, tin (Sn) and transition metals contribute to the formation of a more protective char residue. The residue serves as a physical barrier, effectively isolating the underlying epoxy (EP) matrix material from heat and oxygen.
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危险品化学品经营许可证（带存储）