JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
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IF 1.6
Liu Xinying,Lei Yuhan,Shi Jialin,Wang Zixuan,Zhang Wenxiu,Zhang Guanghui,Gu Ping
A novel adsorbent, Mn-MOF-74, was synthesized using a room-temperature, water-based method by assembling Mn 2+ metal nodes with 2,5-dihydroxyterephthalic acid ligands, and was further applied for Co 2+ removal. Mn-MOF-74 exhibited minimal pH dependence within a pH range of 3–8.5, achieving Co 2+ removal efficiencies between 92.5 and 96.3%, with a distribution coefficient of up to 2.9 × 10 4 mL·g −1 . A function relationship between the Co 2+ removal efficiency and the adsorbent dosage or initial concentration was proposed. The dominant removal mechanism was identified as ion exchange between Mn 2+ and Co 2+ , with chemisorption being the primary rate-limiting step.
研究领域:
环境科学
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材料科学
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化学工程
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无机化学
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产品关联
DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 39
·15044-15055
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IF 7.367
Dong Li,Guanjie Xing,Shilin Tang,Xiaohong Li,Louzhen Fan,Yunchao Li
We report herein a heat-triggered precursor slow releasing route for the one-pot synthesis of ultrathin ZnSe nanowires (NWs), which relies on the gradual dissolving of Se powder into oleylamine containing a soluble Zn precursor under heating. This route allows the reaction system to maintain a high monomer concentration throughout the entire reaction process, thus enabling the generation of ZnSe NWs with diameter down to 2.1 nm and length approaching 400 nm. The size-dependent optical properties and band-edge energy levels of the ZnSe NWs were then explored in depth by UV-visible spectroscopy and cyclic voltammetry, respectively. Considering their unique absorption properties, these NWs were specially utilized for fabricating photoelectrochemical-type photodetectors (PDs). Impressively, the PDs based on the ZnSe NWs with diameters of 2.1 and 4.5 nm exhibited excellent responses to UVA and near-visible light, respectively: both possessed ultrahigh on/off ratios (5150 for UVA and 4213 for near-visible light) and ultrawide linear response ranges (from 2.0 to 9000 μW cm−2 for UVA and 5.0 to 8000 μW cm−2 for near-visible light). Furthermore, these ZnSe NWs were selectively doped with various amounts of Mn2+ to tune their emission properties. As a result, ZnSe NW film-based photochromic cards were creatively developed for visually detecting UVA and near-visible radiation.
研究领域:
材料科学
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光电材料
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纳米技术
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产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2019
·
IF 13.903
Shuang-Shuang Wan,Qian Cheng,Xuan Zeng,Xian-Zheng Zhang
Here, a Mn(III)-sealed metal–organic framework (MOF) nanosystem based on coordination between Mn(III) and porphyrin (TCPP) via a one-pot method was designed and constructed. Mn(III), as a sealer, not only quenched TCPP-based fluorescence but also inhibited reactive oxygen species (ROS) generation, which made MOFs an “inert” theranostic nanoparticle. Interestingly, upon endocytosis by tumor cells, MOFs were disintegrated into Mn(II) and free TCPP by intracellular glutathione (GSH) in tumor cells, owing to redox reaction between Mn(III) and GSH. This disintegration would lead to consumption of antioxidant GSH and activated Mn(II)-based magnetic resonance imaging (MRI) as well as TCPP-based fluorescent imaging. More importantly, such a GSH-regulated TCPP release could implement controllable ROS generation under irradiation, which avoided side effects (inflammation and damage of normal tissues). As a consequence, after unlocking by GSH, Mn(III)-sealed MOFs could significantly improve the therapeutic efficiency of photodynamic therapy by combining controlled ROS generation and GSH depletion after precise dual tumor homing.
研究领域:
纳米技术
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癌症研究
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生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Haishuo Wang,Jie Zhang,Zhichun Li,Bin Shi,Shiyin Li,Heyong Huang
Microcystin-LR (MCLR) is a highly toxic pollutant widely distributed in eutrophic waters. The interplay between dissolved organic matter (DOM) and metal ions has been extensively reported; however, the impact of DOM-metal complexes on MCLR remains to be thoroughly studied. In this research, equilibrium dialysis was employed to study the kinetics and isotherms of MCLR adsorption by DOM, meanwhile the Density functional theory (DFT) calculations provided insights into the theoretical mechanisms of Fe(II)/Mn(II) involvement in the adsorption process. The adsorption kinetics revealed that the process is physicochemical, with chemisorption being the critical factor controlling the adsorption rate. The adsorption isotherms confirmed that Fe(II) alters the spatial arrangement of adsorption sites on the superficies of DOM, with the complexes of Fe(II) and DOM from the macrophyte-dominated regions of Lake Taihu (MDR-Fe(II)) showing the uppermost adsorption capacity of 6193.965 µg/g among all combinations. The influence of different cations (K + , Ca 2+ , Na + , Mg 2+ ) on the adsorption of MCLR to DOM is divergent, with metals either reducing MCLR adsorption through competition for adsorption sites or increasing it by forming ternary complexes. The pH decrease reduced the affinity of DOM to metal ions while simultaneously enhancing MCLR adsorption through changes in its ionization state. DFT calculations demonstrated that Fe(II)/Mn(II) reduces the resistance to interaction between functional groups on DOM and MCLR, with carboxyl-Fe(II)-carboxyl interactions showing the highest binding energy (ΔG = −7.253 eV). Overall, Fe(II)/Mn(II) enhances the adsorption of MCLR via altering the structure and surface electrostatic potential distribution of DOM. This research indicates that the ultimate fate of MCLR in aquatic ecosystems is affected by DOM and metal ions.
研究领域:
环境科学
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毒理学
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理论化学
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产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2022
·
IF 2.719
Huan Zhang,Chang Liu,Yu Wang,Feifei Jia,Shaoxian Song
In this work, Mn (II) was doped into MoS 2 structure and then anchored on activated alumina beads to construct 3D-sized composites (Mn-MoS 2 @AABs). This component material was used as PMS activator for tetracycline (TC) degradation under light irradiation. According to experiment results, Mn-MoS 2 @AABs exhibited well degradation performance to TC, which ascribed to excellent photo-response property of Mn-MoS 2 and activation of Mn. Importantly, the 3D-sized structure made it facilely be recycled from solution, which catered to the demand for the practical application. Therefore, the novel strategy of designing Mn-MoS 2 @AABs had great significance for environmental restoration.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Fawen Liang,Zhang Liu,Xueding Jiang,Jiesen Li,Kaibang Xiao,Weicheng Xu,Xin Chen,Jinzhi Liang,Zhifeng Lin,Meng Li,Xiaolian Wu,Hailong Wang
In this study, NaOH-modified biochar supported Fe/Mn bimetallic composite (Fe-Mn/AW-BC) was prepared to remove tetracycline (TC) through activating peroxymonosulfate (PMS). Results showed that about 97.9 % of TC was degraded and the rate constant of Fe-Mn/AW-BC + PMS system was 37 folds higher than BC + PMS system. Experimental results confirmed that both radical and non-radical pathway were contribute to the catalytic system. Density functional theory (DFT) results also suggested that Fe-Mn/AW-BC sample was favorable for adsorbing PMS based on the length O O bond from PMS and the E ads of catalysts. The superior activation ability was ascribed to the accelerating formation of reaction active species and other oxidation species by bimetallic structures of Fe-Mn and oxygenated functional groups of BC. Additionally, the redox cycles of Fe 3+ /Fe 2+ and Mn 3+ /Mn 2+ under Fe-Mn-BC synergism promoted the generation of the radicals, whereas the carbon shell effectively inhibited metals leaching of Fe-Mn/AW-BC, and 77.8 % of TC can be still removed within 60 min after five consecutive cycles. Notably, Fe-Mn/AW-BC system has special characteristic of wide pH usable range and broad-spectrum adaptability towards various organic pollutants and various water environments. Based on intermediate identification and Fukui function calculation, the degradation pathways of TC were also proposed. This study highlights the applications of biochar for the environmental catalysis.
研究领域:
环境科学
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催化材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2013
·Vol. 25
·期 2
·754-759
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IF 1.486
Liu Lu,Huang Miaoliang,Lan Zhang,Wu Jihuai,Shang Guanglu,Liu Guijing,Lin Jianming
Mn-doped CdS quantum dot sensitized solar cells based on SnO 2 microsphere photoelectrodes are prepared with successive ionic layer adsorption and reaction method. It is found that with Mn-doped CdS quantum dot sensitizers, the photovoltaic performance of the cells based on SnO 2 microsphere photoelectrodes can obviously be enhanced. The reasons are owing to the improved light absorption and the expanded light absorption edge by doping Mn in CdS quantum dots. The electrochemical impedance spectroscopy analysis found that the cells with Mn-doped CdS quantum dot sensitized SnO 2 microsphere photoelectrodes can efficiently suppress dark reaction, owing to the increased related resistance. Moreover, it is also found that the Mn-doped CdS quantum dot sensitized SnO 2 microsphere photoelectrode can increase the electron diffusion lifetime in the cell. The power conversion efficiency of the cell with 4 wt% Mn-doped CdS quantum dot sensitizers can attain to 2.80 %, with 53 % enhancement compared with that of the CdS quantum dot sensitized cell (1.83 %).
研究领域:
材料科学
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光伏技术
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纳米技术
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Yuefeng Liu,Jun Zhao,Yan Zhang,Huafang Zhang,Zhenlong Zhang,Huiping Gao,Yanli Mao
Upconversion nanoparticles (UCNPs) doped with lanthanide ions have potential applications in biomedical, solar cells and displays. However, the intensity of the upconversion luminescence (UCL) is limited by the surface effects of nanomaterials , lattice defects, etc. Here, a novel α-NaErF 4 hollow nanocube is fabricated by using divalent manganese ions (Mn 2+ ) to substitute trivalent erbium ions (Er 3+ ) in the NaErF 4 matrix. The hollow-shell structure can weaken the luminescence quenching and surface quenching effects, reduce the energy loss of higher energy levels in nanoparticles , and improve the light capture ability of nanoparticles. So the UCL of α-NaErF 4 hollow nanocubes is greatly improved, which is 14, 790 and 1071 times higher than that of the β-NaErF 4 under 808, 980 and 1530 nm laser excitation, respectively, and the emission in the red region is enhanced respectively by 69, 2049 and 2902 times. In particular, the hollow nanocubes emit intense single-band red emission under the three different wavelengths, respectively. Moreover, the magnetization of α-NaErF 4 hollow nanocubes is 2.16 emu g −1 at room temperature, which is larger than that of gadolinium-based materials. Hollow-shell structure, excellent paramagnetism and single-band red upconversion emission excited by various wavelengths will create NaErF 4 :40Mn UCNPs a good application prospect in the biomedical field.
研究领域:
纳米材料
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生物医学工程
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光学材料
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 28
·13668-13675
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IF 9.931
Hongtao Guan,Pan Cai,Xiaomeng Zhang,Yanlin Zhang,Gang Chen,Chengjun Dong
We demonstrate the design and fabrication of novel Cu2O@Mn(OH)2 core–shell hierarchical structures using octahedral Cu2O as a template. The Cu2O backbone supports the growth of an ultrathin Mn(OH)2 nanoflake shell, leading to a relatively large surface area (65.8 m2 g−1) for sufficient utilization of active materials. Cyclic voltammetry (CV) and galvanostatic charge–discharge measurements (GCD), as well as cycling stability and electrochemical impedance spectroscopy (EIS) were performed to examine the electrochemical performances of the Cu2O@Mn(OH)2 core–shell structure. Applied as a supercapacitor electrode, the Cu2O@Mn(OH)2 composite delivers a high specific capacitance of 540.9 F g−1 at 1 A g−1 and an energy density of 6.4–18.2 Wh kg−1. After conducting 3000 cycles at 5.0 A g−1, the capacitance retention of 71.5% was achieved. The unique core–shell structure of the Cu2O@Mn(OH)2 composite favours the effective transport of electrolytes and shortens the ion diffusion path. In addition, the synergetic effects from both Cu2O and Mn(OH)2 significantly enhance the electrochemical performances. Our findings suggest that this Cu2O@Mn(OH)2 core–shell is very promising for next generation high-performance supercapacitors.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shuangjie Xu,Chongqi Wang,Lianxu Ye,Ruixing Xu,Yu Wang,Kaifeng Li,Feng Chen,Yanda Ji,Jiyu Fan,Fengjiao Qian,Chao Yun,Lei Qiu,Weiwei Li,Hao Yang
Real-time monitoring of structural health status is very important for supersonic aircraft, since the long-term operation in harsh service environments, such as high temperatures, can cause potential damage. Structural health monitoring (SHM) based on lamb wave has been approved to be a critical technique for the reliable operation of supersonic aircraft , but is limited by the operating temperature of conventional piezoelectric sensors , which makes it difficult to meet the high-temperature monitoring requirements. The BiFeO 3 –BaTiO 3 ceramics exhibit excellent piezoelectric properties and high Curie temperature ( T c ), making them promising for high-temperature SHM of supersonic aircraft. Here, we fabricated a piezoelectric sensor using 0.67BiFeO 3 -0.33BaTiO 3 -0.25%molMnO 2 (BF33BTMN-025) ceramic, which exhibits a piezoelectric charge constant ( d 33 ) of 135 pC/N at room temperature and a T c of 448 °C. The BF33BTMN-025 ceramic sensor operates effectively at temperatures up to 200 °C and maintains stable damage monitoring sensitivity as well. Compared with Pb(Zr, Ti)O 3 (PZT), BaTiO 3 (BTO) and other piezoelectric sensors commonly used in SHM field, the BF33BTMN-025 ceramic sensor has a higher operating temperature and a comparable sensitivity. Our work demonstrates that the BF33BTMN-025 ceramic sensor can be employed as piezoelectric sensor for high-temperature SHM, which has a wide application potential in the field of real-time monitoring of supersonic aircraft.
研究领域:
材料科学
·
航空航天工程
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结构健康监测
✓ 已验证
产品关联
DOI
高影响因子
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.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yumeng Lian,Yi Wang,Dun Zhang,Likun Xu
Developing a stable and reusable material for antibacterial application in an enzyme-like system is still a challenge. Herein, Mn–Co–S–Se (MnCo 2 S x Se 4–x )/Ni foam (NF) are synthesized by introducing S 2– and Se 2– in MnCo 2 O 4 /NF with a facile hydrothermal approach. With the different molar ratios of S/Se, the surface morphology of MnCo 2 S x Se 4–x /NF shows different growth and the catalytic activity also presents regular changes. MnCo 2 S 3.1 Se 0.9 /NF possesses a high enzyme-like ability with higher V max than natural horseradish peroxidase . Due to the outstanding peroxidase-like activity, MnCo 2 S 3.1 Se 0.9 /NF also exhibits broad-spectrum bactericidal performance towards Escherichia coli and Staphylococcus aureus which stems from the formation of ·O 2 – from H 2 O 2 . In the reutilization experiment, the enzyme-like activity keeps a stable value after 25 cyclic tests and the bactericidal performance is still stable after 10 cyclic tests, proving that MnCo 2 S 3.1 Se 0.9 /NF possesses relative stability and reusability. This research showed the great prospect of new energy and environmental catalysis.
研究领域:
生物材料学
·
环境催化
·
纳米酶研究
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）