JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2015
·Vol. 26
·期 9
·6776-6780
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IF 1.569
Cao Renping,Xu Haidong,Peng Dedong,Gou Qingdong,Zhou Shenlin,Liu Pan,Yu Xiaoguang
BaWO 4 :Sm 3+ , Mo 6+ /K + phosphors are synthesized by a high temperature solid-state reaction method in air. The very strong emission bands peaking at ~600 and 644 nm and the strongest excitation band peaking at ~403 nm are assigned to the 4 G 5/2 → 6 H J (J = 7/2 and 9/2) and 6 H 5 / 2 → 4 F 7 / 2 transitions of Sm 3+ ion, respectively. The optimal Sm 3+ doping concentration is ~5 mol%. Emission intensity of BaWO 4 :Sm 3+ phosphor is increased more than twice owing to charge compensation when the K + ion is codoped as charge compensator, however, Mo 6+ ions is small influence to its emission intensity. The energy transfers and luminous mechanism are explained by using energy level diagrams of WO 4
2− group and Sm 3+ ion. Lifetimes of Ba 0.925 WO 4 :0.05Sm 3+ , Ba 0.925 W 0.9 Mo 0.1 O 4 :0.05Sm 3+ , and Ba 0.9 K 0.05 WO 4 :0.05Sm 3+ phosphors with excitation 403 nm are about 0.933, 0.882, and 0.693 ms, respectively. The experiment results indicate that BaWO 4 :Sm 3+ , Mo 6+ /K + phosphors will be a potential red phosphor candidate for white LEDs based on near UV (~403 nm) LED chip and research contents are useful to improve luminescence properties of Sm 3+ -doped phosphors.
研究领域:
材料科学
·
光学
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Junxiao Shen,Yi Hao,Yangxi Yan,Zhimin Li,Pangpang Wang,Ri-ichi Murakami,Dongyan Zhang
Layered cathode materials for lithium-ion batteries have been extensively investigated; however, comparatively scant attention has been paid to Mn-rich layered cathode materials. Herein, LiNi 0.5 Mn 0.5 O 2 cathode materials are doped to investigate the effect of doping elements on the electrochemical properties of Mn-rich layered cathodes. XRD (X-ray diffraction), XPS (X-ray photoelectron spectroscopy), and SQUID (superconducting quantum interference device) results reveal that Mo doping affects the electrochemical properties of the cathode materials by changing the valence state of transition metal ions. Due to the Mo 6+ ions doping, a large proportion of Mn 3+ ions present in LiNi 0.5 Mn 0.5 O 2 were converted to Mn 4+ ions, which alleviated the Jahn-Teller effect and reduced the elongated Mn-O octahedra, thus increasing the Li layer spacing and facilitating Li + diffusion. Therefore, 1 % Mo-doped cathode exhibits a significantly improved Li-ion diffusion coefficient and superior rate performance with a specific discharge capacity of 103 mAh·g −1 at 5C. Meanwhile, the cathode materials significantly improve cycling performance due to the reduction in the amount of Mn 3+ . The current study provides guidelines for the modification of Mn-rich layered cathodes in the future.
研究领域:
材料科学
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电化学
·
电池技术
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高影响因子
Materials
·
2024
·Vol. 17
·期 11
·2679
·
IF 3.1
Tongtong Chen,Xianying Han,Mengling Jie,Zhiwu Guo,Jiangang Li,Xiangming He
Na4Fe3(PO4)2P2O7/C (NFPP) is a promising cathode material for sodium-ion batteries, but its electrochemical performance is heavily impeded by its low electronic conductivity. To address this, pure-phase Mo6+-doped Na4Fe3−xMox(PO4)2P2O7/C (Mox-NFPP, x = 0, 0.05, 0.10, 0.15) with the Pn21a space group is successfully synthesized through spray drying and annealing methods. Density functional theory (DFT) calculations reveal that Mo6+doping facilitates the transition of electrons from the valence to the conduction band, thus enhancing the intrinsic electron conductivity of Mox-NFPP. With an optimal Mo6+doping level of x = 0.10, Mo0.10-NFPP exhibits lower charge transfer resistance, higher sodium-ion diffusion coefficients, and superior rate performance. As a result, the Mo0.10-NFPP cathode offers an initial discharge capacity of up to 123.9 mAh g−1at 0.1 C, nearly reaching its theoretical capacity. Even at a high rate of 10 C, it delivers a high discharge capacity of 86.09 mAh g−1, maintaining 96.18% of its capacity after 500 cycles. This research presents a new and straightforward strategy to enhance the electrochemical performance of NFPP cathode materials for sodium-ion batteries.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2026
·
IF 3.8
Yujie Liang,Ruoshan Lei,Shilong Zhao,Denghao Li,Muzhi Cai,Shiqing Xu
This study demonstrates that the strategic control of the Mo 6+ stoichiometric ratio modulates the phase structure, photoluminescence (PL), and X-ray excited luminescence (XEL) properties of Eu 2 Mo 3(1+x) O 12 phosphors. An excess of Mo 6+ is shown to inhibit the α-Eu 2 Mo 3 O 12 phase and stabilize the β′-Eu 2 Mo 3 O 12 phase, with the Eu 2 Mo 3.15 O 12 composition achieving the highest β′-phase purity. The phase composition and associated defect-related effects collectively affect the luminescence behavior, enabling the optimal Eu 2 Mo 3.15 O 12 sample to exhibit the strongest Eu 3+ red emissions under both UV and X-ray excitation. Moreover, it exhibits a sensitive X-ray dose-rate response, a low detection limit (1.24 μGy s −1 ), and favorable radiation stability, indicating its potential as a promising red-emitting scintillator. These findings highlight the efficacy of host matrix engineering through cation stoichiometry control for developing high-performance molybdate-based scintillators.
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高影响因子
MICROCHEMICAL JOURNAL
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2026
·
IF 5.2
Bo Zhang,Kang Chen,Jiahao Niu,Qi Lu,Wei Yu,Yanan Xiao,Chengkun Dong,Yi Ni,Chengxin Zhao
The 3 mol% Mo 6+ − doped In 2 O 3 nanowires exhibit a high response of 233.5 and a LOD as low as 25.4 ppb for TMA detection. • Substitutional Mo 6+ and surface MoO 3 jointly regulate surface oxygen chemistry and charge transfer. • Mo 6+ doping induces concurrent regulation of lattice, electronic, and surface properties in In 2 O 3 nanowires. • The Mo 6+ − doped In 2 O 3 sensor demonstrates practical application in fish-freshness monitoring through TMA detection. Marine fish are highly susceptible to deterioration during capture, transportation, and storage, accompanied by the generation of malodorous trimethylamine (TMA), making rapid TMA detection highly desirable for freshness assessment. In this work, Mo − containing In 2 O 3 nanowires with different nominal Mo/In ratios were synthesized, and their TMA sensing properties were systematically investigated. The 3 mol% Mo sample (3IMO) exhibited the optimal sensing performance, with the optimal operating temperature decreasing from 220 °C for undoped 0IMO to 200 °C, while the response toward 100 ppm TMA increased markedly from 32.2 to 233.5. The 3IMO sensor also exhibited a rapid response time of 2 s, a recovery time of 262 s, and a low limit of detection (LOD, 0.0254 ppm). Structural analyses reveal that the introduced Mo exists predominantly as substitutional Mo 6+ incorporated into the In 2 O 3 lattice, accompanied by a minor amount of highly dispersed surface MoO 3 nanocrystallites. The enhanced sensing behavior is therefore attributed to the synergistic contributions of these two Mo configurations: lattice-incorporated Mo 6+ provides the dominant regulation of carrier/surface-charge characteristics and surface oxygen chemistry, whereas trace surface MoO 3 provides auxiliary interfacial charge modulation and possible Lewis-acidic adsorption sites. Combined with the pronounced enrichment of chemisorbed oxygen species, these effects facilitate TMA surface redox reactions and amplify resistance modulation. Furthermore, practical fish-storage experiments demonstrate that the 3IMO sensor can effectively track the freshness deterioration, showing consistency with pH and Quality Index Method (QIM) sensory evaluations. These results demonstrate the potential of Mo − modified In 2 O 3 nanowires for sensitive TMA detection and fish freshness monitoring. Download: Download high-res image (236KB) Download: Download full-size image
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高影响因子
NANO
·
2025
·
IF 1.1
Yi Gou,Jinghong Du,Zilong Wang,Shengyang He,Jiahao Lv
La 3+ single-doped and La 3+ -Mo 6+ co-doped TiO 2 nanotubes were synthesized via anodic oxidation combined with a two-step electrochemical process. Their crystalline structure, microstructure, and light absorption properties were characterized using XRD, SEM, and UV-Vis spectroscopy, followed by methylene blue photocatalytic degradation experiments. The results indicate that both La 3+ single-doping and La 3+ -Mo 6+ co-doping can suppress the transformation of the anatase phase to the rutile phase and inhibit grain growth. The diameters of both types of nanotubes range between 60-80 nm, with La and Mo uniformly distributed throughout the nanotubes. Both La 3+ single-doped and La 3+ -Mo 6+ co-doped induced red shifts in the TiO 2 light absorption peaks. The most pronounced red shift in the light absorption band edges occurred at a La 3+ -Mo 6+ ratio of 3:7, reducing the bandgap width to its minimum value of 2.99 eV. Both La 3+ single-doped and La 3+ -Mo 6+ co-doped TiO 2 exhibited first-order photocatalytic degradation of methylene blue. As the La 3+ single-doped concentration increased or the La 3+ -Mo 6+ co-doped ratio varied from 1:9 to 9:1, both the methylene blue degradation rate and photocatalytic reaction rate initially increased before decreasing, while the half-life initially decreased before increasing. At a La 3+ -Mo 6+ co-doped ratio of 3:7, the photocatalytic activity of the TiO 2 nanotubes was optimal, achieving a maximum degradation rate of 89.73% within 8 hours-a 52% improvement over pure TiO 2 nanotubes.
研究领域:
材料科学
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光催化
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纳米技术
·
环境工程
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Ning Sun,Yang Qin,Gongjin Xu,Yalei Fan,Bowen Zhang,Yu-Cheng Huang,Ying-Rui Lu,Xiangjiang Dong,Lei Lian,Zhichuan Zheng,Ruyue Wang,Qingyu Kong,Zhiwei Hu,Linjuan Zhang,Ming Lei,Kai Huang,Runze Yu
Atomic-scale modulation of crystalline ordering in heterogeneous catalysts offers a critical pathway to enhance reaction kinetics, yet fundamental understanding of how their dynamic structural evolution governs active-site stability remains elusive. Here, we decode these effects by precisely engineering crystallographic gradients from ordered to disordered states, within octahedral building blocks (isolated octahedra [MO 6 ] or dimer [M 2 O 9 ]) of perovskite oxides Ba 3 M x Ru 2-x O 9 (M = Fe, Co). This atomic-level control induces systematic shifts in d / p -band centers and optimizes charge distribution architectures within active regions. Crucially, the highly disordered Ba 3 FeRu 2 O 9 achieves exceptional stability via a self-sacrificial reduction of iron, which generates a built-in electric field (BEF). The BEF promotes optimal adsorption/desorption kinetics of OH*/H* intermediates for the hydrogen evolution reaction (HER). Consequently, Ba 3 FeRu 2 O 9 delivers benchmark alkaline HER performance, achieving an overpotential of just 24 mV at 10 mA cm −2 and demonstrating operational stability exceeding 600 h. Our results reveal that structural reorganization, enabled by atomic-level ordering modulation, is critical for establishing dynamic structure-performance frameworks to guide advanced catalyst design.
研究领域:
材料化学
·
电化学
·
催化化学
·
固态化学
·
能源材料
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DOI
高影响因子
Functional Materials Letters
·
2023
·
IF 1.3
Chaoqian Qin,Jinghong Du,Jiaxing Chen,Jiarui Yang,Shengyang He
Titanium dioxide nanotube arrays doped with Mo 6 + , Gd 3 + , and Mo 6 + - Gd 3 + were prepared by anodic oxidation combined with a two-step electrochemical method. The crystalline structure, surface morphology, light absorption properties, and crystalline transformation process were characterized using XRD, SEM, UV–Vis, DSC, and FT-IR. The results show that Mo 6 + and Gd 3 + single doping of TiO 2 can promote the transformation of amorphous TiO 2 to anatase and inhibit the transformation of anatase phase to rutile, but Mo 6 + – Gd 3 + co-doping promotes both phase transformations, and the anatase compositions of the TiO 2 heat-treated at 450 ∘ C were all over 91%; The tube diameters of TiO 2 nanotubes were all around 60–70 nm; the Mo 6 + - and Gd 3 + -doped TiO 2 light absorption peaks were all significantly red-shifted, with the most obvious change in the Mo 6 + – Gd 3 + co-doping, where the forbidden bandwidth was reduced to 3.01 eV; The degradation rate of pure TiO 2 photocatalytic degradation of methylene blue for 8 h was only 41.9%, while the degradation rate of Mo 6 + – Gd 3 + co-doped TiO 2 was as high as 91.51%; Mo 6 + , Gd 3 + , single doping and co-doping could increase the amount of •OH, •OOH adsorbed on the surface of TiO 2 , which led to the improvement of catalytic performance.
研究领域:
材料科学
·
纳米技术
·
环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Shan Yue,Jiayi Gao,Hui Kan,Ting Zhang,Xiangdong Ma,Rui Liu,Mingjing Zhao,Xiaohong Xia
Modulating the electrocatalytic interface is key to efficiently converting 5-hydroxymethylfurfural (HMF) into 2,5-furandicarboxylic acid (FDCA). Herein, a NiCo( OH ) x /NiCoMoO 4 heterojunction electrocatalyst is constructed. The high-valence Mo 6+ substrate acts as an electron regulator, creating electron-deficient Ni sites and promoting the formation of active Ni 3+ species for HMF oxidation. Operando analysis and distribution of relaxation times (DRT) studies confirm that the Mo 6+ substrate enhances charge transfer and mass transport. This special electronic structure directs selective aldehyde group activation, steering the reaction along the HMFCA pathway. The obtained catalyst achieves a 91.4% FDCA yield with 96% Faradaic efficiency at 1.4 V vs. RHE. This work demonstrates a dual modulation strategy via high oxidation state substrate for efficient biomass conversion.
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高影响因子
ACS Applied Nano Materials
·
2018
·
IF 0
Mu Gao,Xiaofeng Lu,Sihui Chen,Di Tian,Yun Zhu,Ce Wang
Doping with transition metal ions has been regarded as one of the most effective means to optimize the catalytic efficiency of metal oxides. In this work, a general approach for the fabrication of Mo6+-doped Co3O4 (Mo–Co3O4) nanotubes for peroxidase mimicking has been demonstrated via an electrospinning method combined with a calcination process. The prepared Mo–Co3O4 nanotubes exhibited a higher peroxidase-like catalytic activity than pure Co3O4 nanotubes, and the highest catalytic activity is achieved when the molar fraction of Mo is 2.0%. The catalytic kinetic of Mo–Co3O4 nanotubes follows a typical Michaelis–Menten mechanism, representing a strong affinity to H2O2 and 3,3′,5,5′-tetramethylbenzidine (TMB) substrates. Because of the high catalytic efficiency of the Mo–Co3O4 nanotubes, we have developed a facile and efficient strategy for the sensitive colorimetric determination of l-cysteine with a low detection limit of 24.2 nM. This detection limit is superior to many previous reported enzyme-like detection systems. Furthermore, a favorable selectivity toward the determination of l-cysteine based on this approach is also achieved, showing bright prospects in environmental monitoring and biomedical analysis.
研究领域:
材料科学
·
生物医学工程
·
分析化学
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DOI
RSC Advances
·
2021
·Vol. 11
·期 61
·38523-38527
·
IF 3.361
Jianfeng Qiu,Jiaqi Pan,Shunhang Wei,Qifeng Liang,Yawei Wang,Rong Wu,Chaorong Li
Normal MoS2 exhibits a low photocatalytic performance for H2 production owing to the deficiency of the active sites and the poor electrical conductance. In this work, MoS2 anchored on the surface of the carbon nanofibers was designed to enhance the activity of the exposed edge and the electrical conductivity at the same time. The oxidation of the surface Mo atoms increases the activity of the exposed edge of the MoS2. The introduction of carbon nanofibers facilitates the effective transportation of the electron–hole pairs by enhancing the electrical conductivity. As a result, the introduction of carbon nanofibers and Mo6+ can facilitate the electron–hole pair separation to enhance the photocatalytic hydrogen evolution reaction (HER) performance (to eight fold more than normal MoS2).
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DOI
PubMed
高影响因子
JOM
·
2022
·Vol. 74
·期 12
·4672-4681
·
IF 2.597
Zhang Bao,Zhang Yingjie,Zhang Qi,Gao Yifeng,Zhu Bowen,Gong Rui,Wang Zhengwu,Bu JiaoJiao,Lian Zheng,Zhou Kai,Dong Peng,Zhang Yannan
Lithium ion spinel lithium manganate (LiMn 2 O 4 ) is a promising positive material due to its typical three-dimensional network as well as abundant manganese sources. However, the electrodes suffer from severe capacity degradation on account of the Jahn–Teller effect and spontaneous disproportionation reactions. In this work, we have fabricated Sm 3+ , Mo 6+ dual-doped LiMn 2 O 4 -positive materials using a facile solid phase strategy. Electrochemical test results show that the discharge capacity and capacity retention of the LMO-Sm&Mo material reaches 101.30 mAh g −1 and 88.08% after 200 cycles (85.69 mAh g −1 and 76.32% for LMO) at 1 C, which results from the synergistic enhancement of the double-cation (Sm 3+ , Mo 6+ ) doping strategy. Even at 10 C, LMO-Sm&Mo still exhibits a promising specific discharge capacity of 98.71 mAh g −1 . Moreover, ICP analysis indicates that the manganese dissolution of LMO-Sm&Mo in organic electrolyte is much lower than that of the undoped sample (LMO). Overall, the results indicate that the Sm 3+ , Mo 6+ co-doping is an effective strategy for enhancing the structural stability and electrochemical properties of spinel Mn-based positive electrodes.
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高影响因子
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