CERAMICS INTERNATIONAL
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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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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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FUEL
·
2025
·
IF 7.5
Dawei Wu,Aijia Zhang,Jing Liu,Yingju Yang
MFe 2 O 4 (M = Ca, Mn, Co, Ni, Cu and Zn) spinel sorbents were synthesized by a low-temperature sol–gel auto-combustion method for arsenic adsorption from flue gas. CuFe 2 O 4 spinel exhibited the highest arsenic removal performance among these sorbents, and the adsorption capacity reached 14.09 mg/g at 800 °C. The pseudo-first order, pseudo-second-order and Elovich kinetic models can well predict arsenic removal process, which indicates that the mass transfer and chemisorption processes are important during arsenic capture by CuFe 2 O 4 . The impact of incineration flue gas components on As 2 O 3 adsorption was elucidated. It was found that HCl showed negligible effect on arsenic removal by CuFe 2 O 4 sorbent while CO 2 , H 2 O, SO 2 and NO played inhibition roles. X-ray photoelectron spectroscopy results revealed that the adsorbed arsenic exists in the forms of As 3+ and As 5+ on the sorbent surface. The chemisorption and oxidation mechanisms are responsible for arsenic adsorption by CuFe 2 O 4 . The toxicity characteristic leaching procedure and sequential extraction experiments demonstrated that arsenic can be considerably immobilized in the CuFe 2 O 4 sorbent. The high arsenic capture capacity, excellent HCl resistance and low risk of secondary contamination make CuFe 2 O 4 an efficient sorbent for gaseous arsenic capture.
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OPTICAL MATERIALS
·
2024
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IF 3.8
Renjie Jiang,Jie Chen,Mingqin Li,Yanna Tian,Shiji Shen,Xuan Yang,Yanru Tang,Yan Sun,Hui Lin,Shengming Zhou
Ce: YAG- Al 2 O 3 composite ceramics are regarded as highly promising materials for laser illumination application due to their high luminous efficacy and thermal stability. Nevertheless, the Ce: YAG ceramics exhibit limited color rendering index (CRI) for indoor lighting due to their low red emission component. In this study, we synthesized high-performance Ce, Mn-doped (Y, Tb) 3 Al 5 O 12 –Al 2 O 3 composite ceramic phosphors via a vacuum solid-state sintering method. It was observed that the introduction of Mn 2+ ions created a second luminescence center with an emission peak centered at 580 nm. As the Mn 2+ concentration increased, the emission peak redshifted from 580 nm to 591 nm, leading to a significant enhancement in the color rendering index of the ceramics. The cross-energy transfer between Tb 3+ and Mn 2+ , Ce 3+ ions augmented the absorption and conversion of blue light by the ceramics, thereby reducing the correlated color temperature greatly. Based on these findings, ceramics with a Ce 3+ concentration of 3 at% and a Mn 2+ concentration of 4 at% exhibited the highest CRI values (81.3 and 75.6) under both laser excitation and LED excitation, establishing them as strong candidates for achieving high color rendering in white LED/LD illumination applications.
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CHEMICAL ENGINEERING JOURNAL
·
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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SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Zhijia Liao,Zhenyu Yuan,Hongliang Gao,Fanli Meng
This study successfully synthesized a series of Mn(OH)F hollow structures doped with rare earth elements (Sm, Nd, Ce, and Tb) using a hydrothermal method . A comprehensive analysis was conducted on the influence of these dopant elements on the morphology and gas-sensitive properties of Mn(OH)F. The gas-sensing performance of Mn(OH)F nanomaterials doped with Sm, Nd, Ce, and Tb was extensively investigated at 150℃ for methyl acetate , ethyl acetate , propyl acetate , and butyl acetate . The results demonstrated good gas-sensing capabilities, with responses reaching 2.0, 2.0, 2.0, and 2.5, respectively. Compared to undoped Mn(OH)F nanomaterials , the operating temperature of these sensors was reduced by about 100℃, and the response values were nearly tripled. Exceptional selectivity and stability were also observed. In addition, an in-depth exploration was conducted into the underlying mechanisms behind the enhanced gas response due to rare earth element doping . This study provides strong theoretical support for the development of efficient acetate ester gas sensors, demonstrating broad prospects for their widespread application in the industrial field.
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CHEMISTRY-A EUROPEAN JOURNAL
·
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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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 35
·15470-15482
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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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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
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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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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WATER RESEARCH
·
2024
·
IF 11.4
Shiqi Tian,Yuwei Ma,Yuanyuan Xu,Yingzi Lin,Jun Ma,Gang Wen
Dissolved Mn(III), as a potent one-electron transfer oxidant, is ubiquitous in natural waters and sediments and actively involved in the transformation of organics in biogeochemical processes and water treatment. However, the important role of Mn(III) has long been overlooked because of its short life. This study was the first to investigate the performance of Mn(III) in organoarsenic transformation and to highlight the environmental implications. Both homogeneous and heterogeneous Mn(III)-based systems were effective to remove p -arsanilic acid ( p -ASA, 15 μ M) with degradation efficiency approaching 40.4 %–98.3 %. Two degradation pathways of p -ASA were proposed, in which As-C bond and amino group were vulnerable sites to Mn(III) attack, leading to the formation of more toxic arsenate (As(V)) and nitarsone. Through transforming organoarsenic to inorganic arsenic species, the removal efficiency of total arsenic and dissolved organics were enhanced to 65.1 %–95.5 % and 16.6 %–36.6 %, respectively, by post-treatment of coagulation or adsorption, accompanied with significant reduction of cytotoxicity and environmental risks. Particularly, polymeric ferric sulfate and granular activated alumina showed superior performance in the total As removal. Moreover, oxidation efficiency of Mn(III) was hardly affected by common cations and anions (e.g., Ca 2+ , Mg 2+ , NH 4 + , NO 3 ˉ, SO 4 ˉ), halide ions (e.g., Clˉ, Brˉ) and natural organic matter, showing high robustness for organoarsenic removal under complicated water matrices. Overall, this study shed light on the significance of Mn(III) to the fate of organoarsenics in manganese-rich environments, and demonstrated the promising potential of Mn(III)-based strategies to achieve targeted decontamination in water/wastewater purification.
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