iScience
·
2024
·
IF 4.6
Jinhu Wang,Junyu Gao,Yingxuan Miao,Dong Li,Yunxuan Zhao,Tierui Zhang
While photocatalytic technology has brought additional opportunities and possibilities for the green conversion and sustainable development of ammonium-based nitrogen fertilizers, the low activation efficiency of the molecular N 2 has impeded its further application feasibility. Here to address the concern, we designed an amorphous molybdenum hydroxide anchored on the ultrathin magnesium-aluminum layered double hydroxide (Mo@MgAl-LDH) nanosheets for benefiting the N 2 photofixation to NH 3 . With the aid of the designed amorphous Mo(V) species, the pristine MgAl-LDH exhibited a considerable performance of nitrogen photofixation under visible light irradiation (NH 3 production rate of 114.4 μmol g −1 h −1 ) due to the improved N 2 activation efficiency. The work demonstrated a feasible strategy for nitrogen photofixation using amorphous Mo(V) species, which may also deliver a novel inspiration for the development of amorphous photocatalysts toward the photoactivation of molecular N 2 .
研究领域:
材料科学
·
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2020
·
IF 3.795
Hai Yan,Bingqiao Yang,Mengyuan Zeng,Pengliang Huang,Aiping Teng
Molybdenite and chalcopyrite is generally separated through the selective depression of chalcopyrite using potentially toxic depressants such as sodium sulfide and cyanides. In this work, xanthan gum (XG), a polymer polysaccharide, was investigated as a potential molybdenite depressant in copper-molybdenum sulfides separation. Single mineral flotation tests indicated that molybdenite could be effectively depressed by XG, while chalcopyrite was slightly affected. The artificial mixed minerals flotation tests proved that molybdenite and chalcopyrite could be selectively separated with the addition of XG. The adsorption mechanism was studied through zeta potential and infrared spectroscopy measurements. The results revealed that XG mainly adsorbed on molybdenite surfaces other than chalcopyrite. In a word, the experiments results illustrated that XG could be applied as a promising depressant in the selective flotation separation of molybdenite and chalcopyrite, which has the advantage of environment compatibility over conventional copper depressants.
研究领域:
矿物加工工程
·
环境科学
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DOI
高影响因子
Nanoscale
·
2025
·Vol. 17
·期 27
·16515-16522
·
IF 5.1
Zhengwei Li,Zixuan Fang,Jiajun Zhu,Wenxi Yang,Yubing Guo,Fan Wang,Jiyang Li,Mengqiang Wu
NCA (LiNixCoyAl1−x−yO2, x ≥ 0.8) cathode materials have become some of the leading candidates for lithium-ion batteries due to their superior specific discharge capacity and more cost-effective production. Yet, NCA materials are facing significant challenges such as surface reconstruction and micro-cracks, which adversely impact their electrochemical performance and practical application. Herein, a simple doping modification strategy using high-valence Mo6+ cations is proposed to address these issues. The experimental analysis results demonstrate the following: (1) the high-valence Mo6+ cations provide additional positive charge and reduce the migration barrier for Li+, thereby improving the Li+ transport kinetics of NCA; (2) Mo6+ doping not only refines the primary particle size, which compacts the stacking of particles, but also optimizes the microstructure of NCA, which prevents the development of micro-cracks and thus enhances the interfacial and bulk-phase stability of NCA; (3) acting as lattice pillars in the TM layers, the high-valence Mo6+ cations increase the thermodynamic barrier for Ni2+ migration from TM sites to lithium sites as well as strengthen the binding with oxygen atoms, thereby suppressing surface reconstruction and oxygen release. Based on the results of electrochemical testing, the prepared Li(Ni0.80Co0.15Al0.05)0.995Mo0.005O2 (NCAM-1) demonstrates a remarkable capacity retention rate of 89.3% after 100 cycles within the voltage range of 3.0–4.3 V and at a rate of 1C, which is significantly higher than the 79.1% retention observed for Li(Ni0.80Co0.15Al0.05)O2 (NCA). Additionally, NCAM-1 delivers a specific discharge capacity of 153.5 mA h g−1 at a high rate of 10C, which is substantially elevated compared to that of NCA (113.5 mA h g−1).
研究领域:
电化学
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材料科学
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能源存储
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固态化学
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电池技术
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Ruiyang Zhang,Aili Zhang,Yuehan Cao,Shuyan Wang,Fan Dong,Ying Zhou
Oxygen as an economic and ubiquitous oxidant plays a significant role in catalysis environmental remediation. However, the high thermodynamic stability of O 2 limits the practical application. Herein, we reported a novel Mo doped carbon nitride (Mo-CN/g-CN) homojunction via the in-situ growth strategy. The strong interaction between Mo-CN and g-C 3 N 4 enhanced visible-light response and photogenerated electrons and holes pairs separation, which were beneficial for photocatalytic activity. Importantly, theoretical calculation and experiments confirmed that Mo atoms on the surface of Mo-CN/g-CN could provide abundant electrons to the adsorbed O 2 to promote the generation of O 2 − , thus enhancing the photocatalytic performance. Consequently, the obtained Mo-CN/g-CN reveals excellent photocatalytic NO removal activity, demonstrating its promise for air purification. This current work gives a novel insight for O 2 activation in the application of photocatalytic environmental remediation.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2017
·
IF 2.048
Kuibao Zhang,Dan Yin,Le Peng,Jingjun Wu,Jiali Xue
In this study, zirconolite/Mo composites were rapidly synthesized by a self-propagation reaction that uses MoO 3 as the oxidant accompanied with pressing. Zirconolite is one of the several materials that are being researched as host for lanthanides and actinides in nuclear waste . Nd was used in this study as a surrogate for actinides and was substituted into zirconolite at a stoichiometric ratio to charge balance the Ca and Zr sites (nominal formulation of Ca 1-x Zr 1-x Nd 2x Ti 2 O 7 ). Perovskite , zirconia, and rutile were generated as the minor phases with the addition of Nd 2 O 3 . The XRD results demonstrated that the Nd 2 O 3 loading is approximately 30 wt%. Nd was mainly incorporated into the lattice structure of zirconolite and perovskite. A 42-day leaching test of the Nd-bearing zirconolite/Mo composite showed that the computed normalized leaching rates for Ca and Nd at fairly low values of 9.02 × 10 −2 and 2.10 × 10 −4 g m −2 d −1 , respectively.
研究领域:
材料科学
·
核废物管理
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DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2026
·
IF 4.7
Liang Yujie,Zhang Jiaying,Lao Xinyu,Wang Zichenlu,Sun Hong,Wang Jingjing,Zheng Yingying,Pan Jiaqi,Li Chaorong,Cao Jun
Rational tuning electronic configuration of CoO is important for accelerating sluggish oxygen evolution reaction (OER) kinetics. This work reports a simultaneous incorporation of highly electronegative fluorine (F) and high-valence molybdenum (Mo) into CoO nanoneedles (denoted as FMo-CoO). The dual-doping strategy boosts Co 3+ content and compressive strain, which strengthens Co—O bond covalency and enables a lattice-oxygen-mediated (LOM) pathway during OER catalysis. Concurrently, the nanoneedle morphology coupled with F/Mo co-doping synergistically enhances surface properties, granting FMo-CoO exceptional superhydrophilicity and superaerophobicity. As a result, FMo-CoO achieves outstanding OER performance in alkaline media, requiring only overpotential of 287 mV at 10 mA/cm 2 . This work provides a novel method to boost the OER performance of CoO by anion and cation ions doping.
The alternative text for this image may have been generated using AI.
✓ 已验证
DOI
高影响因子
TALANTA
·
2026
·
IF 6.7
Yuhan Fu,Shu Wang,Jihui Hu,Yadong Zhou,Chunlian Zhan,Lin Yin,Yan Long Meng
An indirect surface-enhanced Raman spectroscopy (SERS) approach based on an MB-Mo-AgNPs probe system was developed to quantify aqueous KH 2 PO 4 standard solutions. Silver nanoparticles (AgNPs), methylene blue (MB), and ammonium molybdate served as the SERS substrate, Raman reporter, and phosphate-responsive reagent, respectively. All concentrations were expressed as KH 2 PO 4 mass concentrations. Across 0.0625–10 mg L −1 KH 2 PO 4 , the MB bands near 1400, 1470, and 1626 cm −1 decreased with increasing concentration. UV–Vis spectroscopy, qualitative dried-state transmission electron microscopy, dynamic light scattering, and zeta-potential measurements supported changes in the probe’s colloidal state, particle association, and interfacial environment, consistent with a possible indirect signal-modulation pathway. These measurements did not establish a specific molecular mechanism or demonstrate MB desorption. The dataset comprised 2040 spectra from 51 independently prepared physical samples at 17 concentrations. In physical-sample-level grouped training–validation–test rotations, the 40 replicate spectra per sample remained within one subset, preventing sample overlap. Single-peak linear regression was compared with full-spectrum partial least squares regression, support vector regression (SVR), a conventional one-dimensional convolutional neural network (1D-CNN), and an attention-enhanced 1D-CNN. The full-spectrum models yielded lower errors than single-peak linear calibration. SVR achieved the lowest quantitative error among the compared models, with an RMSE of 0.0072 ± 0.0010 mg L −1 across three grouped rotations. In the prespecified grouped analysis, the attention-enhanced 1D-CNN yielded lower quantitative error than the conventional 1D-CNN. The results apply only to aqueous KH 2 PO 4 standard solutions and do not validate total-phosphorus determination, real-wastewater analysis, or performance in external matrices.
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Shuo Li,Jiahe Sun,Songcheng Bo,Fangfang Yang,Kaixuan Yang,Ting Su,Hongying Lü,Zhiguo Zhu
Oxidative desulfurization (ODS) is regarded as a viable carbon–neutral way to produce sulfur-free fuels. Mo framework substituted zeolite is considered to be a potential heterogeneous catalyst to achieve this goal. Nonetheless, the hydrothermal synthesis of Mo-containing zeolite remains a challenging task in terms of theses aspects including the difficulty in isomorphous substitution of Si with Mo due to the large ionic radius of Mo (59 pm), the tendency of Mo species to precipitate in the alkaline medium, and the prolonged crystallization time. Herein, Mo-Beta zeolites were synthesized via interzeolite transformation within a short time of 24 h. The crystallization process followed the dissolution–recrystallization mechanism. Various techniques were used to confirm that Mo species was isomorphously substituted into zeolite framework. Mesopore was also created over Mo-Beta zeolite with different Mo contents. This Mo-Beta zeolites were employed as heterogeneous catalysts in oxidative desulfurization, where framework Mo species was found to be the catalytic active sites. The process parameters (catalyst dosage, reaction temperature, and H 2 O 2 amounts), reaction kinetics, and reusability were also investigated. Mo-Beta exhibited remarkably high catalyst-weight-based space–time-yield and active-site-based turnover frequency, surpassing the zeolite catalysts in the literatures. This work paves an avenue to the hydrothermal synthesis of metallosilicate zeolites for catalytic oxidations.
研究领域:
化学工程
·
催化材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2025
·
IF 3
Qi Li,Zhangqiao Zhou,Yan Nie,Lu Yang,Yu Wang,Jinsong Chen,Xian Wang
The preparation of soft magnetic composites requires effective surface modification of alloy powder to enhance insulating properties and achieve dense, uniform coating layers. Firstly, the gas-atomized Fe-Ni-Mo powder was surface modified using the atomic layer deposition method, forming a uniform and dense Al 2 O 3 insulating layer. The secondary surface modification of organic polymers further improves the properties of soft magnetic composites. This study systematically evaluates the effects of the primary and secondary surface modification on the properties of powder particles and soft magnetic composites. The primary modification generates an extremely thin insulating layer of approximately 2.5 nm, which increases the particle resistivity by 9 orders of magnitude. The permeability frequency stability of the soft magnetic composites increased from 11.3 % to 96.5 %, resulting in significant core loss reduction. The secondary modification effectively enhances the formability of soft magnetic composites. Optimal permeability of 242.7 at 1 kHz is achieved, maintaining 95.2 % frequency stability up to 1 MHz, while core loss remains below 570 mW cm −3 under 100 kHz/100 mT conditions. The surface treatment method in this work can provide a reference for the surface insulation modification of soft magnetic composites.
研究领域:
材料科学
·
电磁学
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产品关联
DOI
高影响因子
ACS Catalysis
·
2016
·
IF 9.307
Jiajun Wang,Wei Wang,Zongyuan Wang,Jingguang G. Chen,Chang-jun Liu
Highly efficient and stable electrochemical catalysts of porous one-dimensional (1D) MS2/MO2 (M = W, Mo) nanorods have been developed for the hydrogen evolution reaction (HER). The materials are synthesized via a “low-temperature conversion” method. The as-prepared catalysts exhibit numerous advantages: abundant amount of exposed MS2 edges, high conductivity, and enhanced mass transport. The MS2/MO2 nanorods show efficient HER activity.
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DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 49
·27686-27694
·
IF 2.936
Xue Yu,Shuying Cheng,Qiong Yan,Jinling Yu,Wen Qiu,Zhengji Zhou,Qiao Zheng,Sixin Wu
Cation substitution plays a crucial role in improving the efficiency of Cu2ZnSn(S,Se)4 (CZTSSe) solar cells. In this work, we report a significant efficiency enhancement of flexible CZTSSe solar cells on Mo foils by partial substitution of Cu+ with Ag+. It is found that the band gap (Eg) of (Cu1−xAgx)2ZnSn(S,Se)4 (CAZTSSe) thin films can be adjusted by doping with Ag with x from 0 to 6%, and the minimum Eg is achieved with x = 5%. We also found that Ag doping can obviously increase the average grain size of the CAZTSSe absorber from 0.4 to 1.1 μm. Additionally, the depletion width (Wd) at the heterojunction interface of CAZTSSe/CdS is found to be improved. As a result, the open-circuit voltage deficit (Voc,def) is gradually decreased, and the band tailing is suppressed. Benefiting from the enhanced open-circuit voltage (Voc), the power conversion efficiency (PCE) is successfully enhanced from 4.34% (x = 0) to 6.24% (x = 4%), and the Voc,def decreases from 915 to 848 mV.
研究领域:
光伏技术
·
材料科学
·
薄膜太阳能电池
·
半导体材料
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DOI
高影响因子
Small
·
2022
·Vol. 18
·期 40
·2203835
·
IF 15.153
Shasha Guo,Toshinari Koketsu,Zhiwei Hu,Jing Zhou,Chang-Yang Kuo,Hong-Ji Lin,Chien-Te Chen,Peter Strasser,Lijun Sui,Yu Xie,Jiwei Ma
Transition metal oxides (TMOs) as high-capacity electrodes have several drawbacks owing to their inherent poor electronic conductivity and structural instability during the multi-electron conversion reaction process. In this study, the authors use an intrinsic high-valent cation substitution approach to stabilize cation-deficient magnetite (Fe 3 O 4 ) and overcome the abovementioned issues. Herein, 5 at% of Mo 4+ -ions are incorporated into the spinel structure to substitute octahedral Fe 3+ -ions, featuring ≈1.7 at% cationic vacancies in the octahedral sites. This defective Fe 2.93 ▫ 0.017 Mo 0.053 O 4 electrode shows significant improvements in the mitigation of capacity fade and the promotion of rate performance as compared to the pristine Fe 3 O 4 . Furthermore, physical-electrochemical analyses and theoretical calculations are performed to investigate the underlying mechanisms. In Fe 2.93 ▫ 0.017 Mo 0.053 O 4 , the cationic vacancies provide active sites for storing Li + and vacancy-mediated Li + migration paths with lower energy barriers. The enlarged lattice and improved electronic conductivity induced by larger doped-Mo 4+ yield this defective oxide capable of fast lithium intercalation. This is confirmed by a combined characterization including electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), galvanostatic intermittent titration technique (GITT) and density functional theory (DFT) calculation. This study provides a valuable strategy of vacancy-mediated reaction to intrinsically modulate the defective structure in TMOs for high-performance lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固体物理
·
纳米材料
·
锂离子电池
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）