OPTICAL MATERIALS
·
2025
·
IF 4.2
Chen-Yang Qi,Dan Zhao,Rui-Juan Zhang,Qing-Xia Yao
Mn 4+ has garnered significant global interest due to its application in red light emission, particularly within the realm of plant growth lighting. However, there are relatively few studies focusing on the incorporation of Mn 4+ into titanate materials. In this research, we synthesized a series of Ba₆Y₂Ti 4-x O₁₇ (BYT: x Mn⁴⁺) phosphors with varying concentrations of Mn 4+ using a high-temperature solid-state synthesis method. Initially, we confirmed the structural integrity and phase purity of the samples through X-ray diffraction (XRD) analysis and refinement techniques. The experimental results indicate that under near-ultraviolet (UV) excitation, these phosphors emit far-red light at approximately 700 nm. Furthermore, their emission spectra align closely with the spectral requirements of chlorophyll and photoreceptive pigments (P r and P fr ), which are essential for optimal plant growth. This characteristic makes them promising candidates for plant cultivation applications. Consequently, we posit that BYT:0.015Mn⁴⁺ represents a novel titanate-based far-red emitting material with considerable potential for use in LED lighting systems designed for plant growth particularly in enhancing photosynthetic efficiency and promoting overall plant development.
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Frontiers of Environmental Science & Engineering
·
2022
·Vol. 17
·期 2
·1-11
·
IF 6.048
Yang Fan,Li Junpeng,Wang Huan,Xiao Xiaofeng,Bai Rui,Zhao Feng
Manganese oxides are widely distributed in soils and sediments, affecting the migration and transformation of heavy metals and organic pollutants. The microbial conversion of soluble Mn(II) into insoluble Mn(III/IV) oxides is considered to be the initial source of manganese oxides in the environment; however, whether this process is related to a physiological role remains unclear. Here, we explored the microbial manganese oxidation process under visible light by using coastal surface seawater microorganisms. Visible light greatly promotes the oxidation rate of Mn(II), and the average rate reaches 64 µmol/(L·d). The generated manganese oxides were then conducive to Mn(II) oxidation, thus the rapid manganese oxidation was the result of the combined action of biotic and abiotic, and biological function accounts for 88 % ± 4 %. Extracellular superoxide produced by microorganisms induced by visible light is the decisive factor for the rapid manganese oxidation in our study. But the production of these superoxides does not require the presence of Mn(II) ions, the Mn(II) oxidation process was more like an unintentional side reaction, which did not affect the growth of microorganisms. More than 70 % of heterotrophic microorganisms in nature are capable of producing superoxide, based on the oxidizing properties of free radicals, all these bacteria can participate in the geochemical cycle of manganese. What’s more, the superoxide oxidation pathway might be a significant natural source of manganese oxide.
研究领域:
环境微生物学
·
地球化学
·
水文学与水资源
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高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 48
·485403
·
IF 3.953
Martine Otay Lifoka,Weixing Niu,Guihua Liu,Changcheng Wu,Jingde Li
Non-precious and stable electrocatalysts towards both oxygen and hydrogen evolution reaction (OER/HER) are essential for effective overall water splitting in alkaline solution. In this study, a sulfur defective and manganese-doped nickel sulfide nanosheet that uniformly grown on nickel foam substrate (Mn–Ni3S2–x@NF) is synthesized. In alkaline solution, the Mn–Ni3S2–x@NF showed a low overpotential of 76 and 110 mV for OER and HER at 10 mA cm−2, respectively, together exhibiting excellent stability for both OER and HER reaction. It was confirmed by the experimental results that sulfur defects and Mn-doping synergistically optimized the electronic structure of Mn–Ni3S2–x with increased electrical conductivity and enhanced OER/HER activity. Moreover, amorphous nickel oxyhydroxide (NiOOH) was observed by in situ Raman during the OER condition, suggesting NiOOH is the active phase for OER reaction. Furthermore, the electrolyzer assembled by Mn–Ni3S2–x@NF merely needs 1.46 V to reach 10 mA cm−2 and shows good stability as well. This study provides a feasible way to prepare high-efficiency bifunctional catalysts for overall water splitting.
研究领域:
材料科学
·
电化学
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POLYHEDRON
·
2018
·
IF 2.067
Xianghua Zeng,Chunhua Gong,Haiyang Guo,Hao Xu,Junyong Zhang,Jingli Xie
A novel phenylthiourea modified Mn-Anderson polyoxometalate , [N(C 4 H 9 ) 4 ] 3 [MnMo 6 O 18 {(OCH 2 ) 3 CNHCSNHPh}{(OCH 2 ) 3 CNH 2 }] ( 1 ) has been synthesized and characterized by IR, NMR, UV–Vis spectroscopy, thermogravimetric, electrochemical and single-crystal X-ray diffraction analysis. Structural analysis reveals that compound 1 crystallizes in the orthorhombic crystal system , space group Pcab with a = 17.7477(9) Å, b = 33.6245(16) Å, c = 32.322(2) Å, V = 19288.7(19) Å 3 and Z = 8. Noticeably, the asymmetric POM cluster with terminal modification could be connected through H-bonding interactions of C H⋯O to form an infinite supramolecular chain. Furthermore, the adjacent 1D chains are linked by H-bonding interactions of N H⋯O to generate a 2D supramolecular layer.
研究领域:
无机化学
·
材料科学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Boyang Shao,Yanlin Zhu,Yaqian Du,Dan Yang,Shili Gai,Fei He,Piaoping Yang
As an emerging technology, nanocatalytic medicine attracts much attention, especially the ones according to the enzymatic reaction by using excess H 2 O 2 in the tumor. Among various candidates, single-atom catalyst (SAC) revealed unique and outstanding redox reaction performance, since the active sites consisting of single metal atoms may achieve the maximum utilization of metal atoms and emerge obviously amplified reaction rate. Here we developed an M−N x (M = Mn, Zn) center-based SAC with a hollow structure by calcination of Mn 2+ -doped zeolitic imidazolate frameworks (ZIF-8), and PEGylation was applied to improve the hydrophilicity. According to the enzymatic reaction, the M−N x (M = Mn, Zn) centers have an inherent peroxidase-like activity to catalyze over-expressed H 2 O 2 in the weak acidic tumor microenvironment and generate a large amount of toxic reactive oxygen species (ROS) like hydroxyl radicals for therapy. To keep efficient therapeutic output, we integrated the hollow SAC with Au which could expend the glucose in tumor and supply H 2 O 2 as the substrate of peroxidase-like activity. Better yet, Au may boost the photothermal effect of SAC and offer another non-invasive photothermal therapy (PTT) to promote the effect of tumor removal. This platform provided a new idea for the construction of more efficient peroxidase-like activity in tumor therapy.
研究领域:
纳米技术
·
癌症治疗
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材料科学
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生物医学工程
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DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 43
·26930-26934
·
IF 3.108
Wei Liu,Huanhuan Li,Yanli Wei,Chuan Dong
A label free phosphorescence sensing platform for trypsin was developed employing Mn doped ZnS quantum dots (Mn-ZnS QDs) as the phosphorescence probe. Mn-ZnS QDs can emit strong room temperature phosphorescence. Upon addition of Cytochrome c (Cyt c), a hybrid complex between Mn-ZnS QDs and Cyt c was formed, and consequently, quenched the phosphorescence of Mn-ZnS QDs. In the presence of trypsin, Cyt c was hydrolyzed into small fragments, and accordingly, the quenched phosphorescence of Mn-ZnS QDs went back and high phosphorescence intensity was observed. As such, based on the phosphorescence signal changes of the system, a label free turn-on phosphorescence sensing platform was fabricated. Factors affecting the determination of trypsin including the concentration of Mn-ZnS QDs, reaction time, temperature and pH effect were comprehensively explored. Under the optimal experimental conditions the restored phosphorescence of the sensing system displayed a response for trypsin in the range of 0.88–15.6 μg mL−1 with a detection limit of 42 ng mL−1. Additionally, the sensing platform was successfully applied for the determination of trypsin in human serum samples with satisfactory recovery.
研究领域:
分析化学
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生物传感器
·
纳米技术
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高影响因子
ADVANCED MATERIALS
·
2026
·
IF 29.1
Huilin Chen,Chenliang Li,Qian Zhu,Yuzhen Wang,Zhiguo Xia
Sensing temperature using fluorescent materials by monitoring alterations in temperature-dependent luminescence characteristics is of great importance for various application fields, including modern industry, scientific research, and daily life. However, there are two main concerns on optical thermometry, and one is the low sensitivity, particularly at elevated temperatures, failing to meet precise measurement demands; another issue is how we can apply the thermometry in in situ environments. Herein, we design and report a hybrid manganese-based halide thermometry exhibiting a relative sensitivity (S r ) of 26.368% K − 1 at 463 K. We further propose a facile synthesis method for photopolymerizable hydrogel films containing the crystallized manganese-based halide thermometry, maintaining the same luminescence and sensing property. The luminescent gel film is applied to chip-based temperature sensing, demonstrating highly accurate performances as smart sensors and flexible electronic materials. This work opens up a new route to design luminescent metal halide thermometry to enrich the library of temperature sensing. Moreover, the luminescent gel film as optical thermometry can be applied in situ from micro-electronics to large-scale industrial systems, supplying new possibilities for advanced sensing and spectroscopy studies.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Xinru Chen,Zisheng Zhou,Xiaoying Wei,Guomin Wang,Zheyi Meng
A flexible self-supported Fe/Mn-CNF anode derived from MOFs was constructed. • Fe/Mn-CNFs-800 achieve superior electrocatalytic efficiency for TC degradation. • Fe/Mn-CNFs-800 exhibit strong flexibility, stability, and recyclability. • Graphitized Fe/Mn‑carbon interface enhances electron transfer and ROS generation. Electrocatalytic degradation of antibiotics remains limited by active site instability, poor electron transfer, and high energy consumption. Herein, we report a flexible, self-supported Fe/Mn‑carbon composite nanofibrous membrane (Fe/Mn-CNF) via electrospinning, two-step MOF growth, and controlled carbonization. By integrating a continuous conductive nanofiber network with a graphitized Fe/Mn heterointerface, this design enables uniform dispersion of bimetallic redox centers and enhanced interfacial electronic coupling. As a result, the Fe/Mn-CNF-800 electrode achieved 97.23% TC removal within 80 min (k = 0.046 min −1 ) and ultralow energy consumption (0.11 kWh·m −3 ), while maintaining over 88% efficiency after eight cycles. Radical quenching and electron paramagnetic resonance analysis revealed that 1 O 2 as the dominant reactive oxygen species (ROS), synergistically assisted •OH, O 2 • − , and ClO•. Density functional theory calculations further confirmed strong electronic coupling and substantial charge redistribution at the Fe/Mn‑carbon interface, enhancing both electronic conductivity and catalytic reactivity. High-performance liquid chromatography-mass analysis identified multistep TC degradation pathways, while toxicity assessment confirmed reduced toxicity after treatment. This work demonstrates a self-supported electrode with strong applicability to real water matrices, providing an efficient and low energy pathway for treating recalcitrant antibiotic pollutants. Download: Download high-res image (219KB) Download: Download full-size image
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Lingyu Chi,Yibo Cui,Hongli Yu,Dong Zhao,Ruibin Hao,Jing Zhao,Quanlin Liu
Mn-doped Zn-based metal halides have attracted increasing attention for applications in white light-emitting diodes and X-ray detection, due to their structural stability and excellent luminescence performance. In this work, two positional isomers, 3-aminopiperidine (3AP) and 4-aminopiperidine (4AP), were selected as A-site organic cations to synthesize four zero-dimensional Zn-based halides, (3AP)Zn X 4 and (4AP)Zn X 4 ·H 2 O ( X = Cl/Br). By incorporating Mn 2 + as luminescent centers, a series of highly efficient phosphors with narrow-band green emission were obtained. Spectroscopic comparisons show that the 4AP-based compounds exhibit better luminescence performance than those based on 3AP. According to Hirshfeld surface analysis, 4AP series features stronger hydrogen-bonding interactions, which enhance the structural rigidity of the crystal lattice and lead to higher photoluminescence efficiency and narrower full width at half maximum. Notably, three of the Mn-doped Zn-based compounds display pronounced X-ray radioluminescence, indicating they could be promising for X-ray detection and imaging applications.
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ChemCatChem
·
2026
·Vol. 18
·期 7
·e70719
·
IF 4.1
Xiaoxiao Wei,Xuemin Cao,Yuting Dai,Yujie Xie,Qingsen Qin,Li Li,Jinjia Liu,Jie Ren,Zhi Cao,Peng He
A series of promoter-doped Raney copper catalysts were prepared via a dealloying method, and their catalytic performance was evaluated in the reverse water–gas shift (RWGS) reaction. It was found that significantly improved CO 2 conversion and CO selectivity were achieved upon Mn doping over the catalyst. Mn existed in the form of a highly dispersed MnO phase, effectively regulating the electronic state and geometry of the active Cu component, thereby promoting the dissociation and adsorption of H 2 and the activation of CO 2 . Under optimized reaction conditions of a gas space velocity of 3000 mL·g cat −1 ·h −1 , a temperature of 600°C, and a Mn doping content of 5 wt%, the catalyst demonstrated a CO 2 conversion of 37.8% and a CO selectivity of 99.9%. Furthermore, after reaction at 600°C for 200 h, the catalyst retained high catalytic activity and structural stability, demonstrating promising prospects for practical application. This study provides crucial theoretical support and experimental evidence for designing highly efficient and stable Cu-based catalysts for the RWGS reaction. Graphical Mn-doped Raney copper catalysts were prepared by dealloying. The Mn promoter was uniformly and highly dispersed in the catalyst in the form of MnO, which enhanced the CO 2 adsorption capacity and H 2 dissociation capacity, thereby improving the catalytic performance of the RWGS reaction.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2026
·
IF 9.2
Wenting Jia,Lin Guo,Zhao Yu,Zhiqiang Li,Pengge Ning,Hongbin Cao
The growing stream of end-of-life lithium-ion batteries from electronic and mobility products has created a pressing need to manage solid residues generated during battery-recycling operations. In ammonia-based leaching flowsheets used for selective critical metal recovery, manganese-rich solid residues (e.g., MnCO 3 or ammonium manganese sulfite/sulfate) are intentionally formed to avoid complex purification. Yet they are often retained as low-value waste due to impurities from unreacted cores. Here, we demonstrate a waste-to-resource pathway that bypasses solution phase recovery by upcycling manganese-rich residues directly into a γ-MnOOH alkaline oxygen evolution catalyst. The residue with MnCO 3 as the main precursor delivers the best performance, with an overpotential of 457.65 mV at 100 mA cm −2 and a Tafel slope of 60.37 mV dec −1 , demonstrating a favorable comparison with commercial noble metal and other benchmarks using commercial transition metal salts as raw materials. Structure-activity analysis attributes the performance to the preferential expression of the high-index facet. This direct solid-state route avoids reagent-grade manganese precursors, eliminates gypsum-forming steps, and cuts life cycle economic and energy demand. The work illustrates a practical waste-to-resource strategy that strengthens manganese security and advances circular economy goals in clean energy technologies.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2026
·
IF 4.1
Yu Wanting,Wu Di,Ao Zhongjie,He Yu,Tang Dianping
Methods based on photo-heat conversion materials have been developed for the immunoassays, but most involve low sensitivity or complex procedures and are unsuitable for routine use. Herein, a portable photothermal immunoassay was designed for point-of-care (POC) testing of disease-related biomarker (carcinoembryonic antigen (CEA)) in biological fluids on a digital near-infrared (NIR) thermometer with smartphone readout. Initially, the photothermal materials with manganese (Mn) and iron (Fe) bimetallic oxide (MnFe 2 O 4 ) were synthesized via a typical hydrothermal method, and then functionalized with polyclonal anti-human CEA detection antibody (pAb 2 ). In the presence of target CEA, a sandwich-type immunoreaction was implemented on monoclonal rabbit anti-human CEA capture antibody-coated microplate with MnFe 2 O 4 -pAb 2 . Under an 808-nm laser irradiation, the labeled MnFe 2 O 4 on the detection antibody converted the light into heat, thereby causing the increasing temperature of the detection solution in the microplate. The variation in the temperature was collected on a portable NIR thermometer with smartphone readout. Under optimal conditions, the MnFe 2 O 4 -based immunoassay exhibited good photothermal responses for the detection of target CEA with a dynamic linear range of 0.01–150 ng mL −1 at a low detection limit of 0.56 pg mL −1 . Good reproducibility, intermediate precision, and high specificity were acquired. No significant differences at the 0.05 significance level were encountered for the analysis of human serum samples between the developed photothermal immunoassay and the commercially available enzyme-linked immunosorbent assay (ELISA) for the determination of CEA. Importantly, this immunoassay offers promise for simple and cost-effective analysis of biological samples in diagnostics. Graphical
The alternative text for this image may have been generated using AI.
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