JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
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2021
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IF 2.235
Menglei Zhang,Hao Song,Chenghang Zheng,Shaojun Liu,Zhenglong Lin,Yi Liu,Weihong Wu,Xiang Gao
Recycling of valuable metals from spent catalysts in a green way is gaining extensive interest for economic and environment reasons. In this study, we developed novel hydrophobic deep eutectic solvents to extract Mo from spent catalysts. The hydrophobic DESs have been designed and synthesized by mixing one molar of the quaternary ammonium salt and two molars of various saturated fatty acids with different carbon chain lengths. The extraction ability and extraction mechanism of these DESs were studied, some factors influencing the extraction efficiency, including the structure of hydrogen bond acceptors and hydrogen bond donors, initial aqueous pH, reaction time and temperature, phase ratios were investigated. It is found that the synthesized hydrophobic DESs exhibit excellent extraction performance toward Mo, where the Mo distribution ratio is more than 2200 in the presence of other metals, corresponding to an extraction efficiency of 99% at optimal reaction conditions. This work reveals a distinct class of materials, guiding an effective and green way for spent catalyst treatment.Implications: Novel hydrophobic deep eutectic solvents have been developed to extract Mo from spent catalysts, the synthesized hydrophobic DESs possess several advantages, such as green, low price, low toxicity, and biodegradability. It exhibits excellent extraction performance under an optimized extraction condition. This work reveals a distinct class of materials, guiding a promising way for green and economical utilization of spent catalysts.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Fei Chen,Mingyong Jia,Yulong She,Yueqi Wu,Qiang Shen,Lianmeng Zhang
In this paper, aluminum nitride (AlN) and molybdenum (Mo) were used for fabrication of AlN/Mo functionally graded materials by spark plasma sintering (SPS). In order to study the influence of microstructure on mechanical properties in AlN/Mo FGMs, the FGMs with different composition exponent p value were analyzed by indentation and bending test . The results showed that the specimens with p < 1 exhibited a metal-rich graded structure comparing to specimens with p ≥ 1. The radial bending and shear strength of AlN/Mo FGMs reached maximum when p < 1, which are 369.78 MPa and 48.01 MPa respectively. Moreover, comparing with the porosity and the ceramic/metal interface, the distribution of the two components is the most important factor for improvement of bending and shear strength. The more the hard metal network content in the graded layer, the higher the bending and shear strength of AlN/Mo FGMs.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Shengming Cheng,Xingxing Cheng,Fuqiang Guo,Donghai An,Jiansheng Zhang
Development of robust and corrosion-resistant anodes is crucial for large-scale alkaline industrial coal gasification wastewater (CGW) electrolysis in an anion-exchange membrane water electrolyser (AEMWE). Herein, we develop a corrosion strategy to construct a self-supported electrocatalyst (CoNiFe@Mo–Ni 3 S 2 ) with high mechanical stability by anchoring the CoNiFe medium-entropy alloy catalytic layer onto a dense interlayer of Mo–Ni 3 S 2 support. The CoNiFe@Mo–Ni 3 S 2 catalyst exhibits a strengthened heterophase between the crystalline Mo–Ni 3 S 2 interlayer and amorphous CoNiFe catalytic layer, significantly facilitating electron diffusion and reaction kinetics. In 1 M KOH +50% CGW, the CoNiFe@Mo–Ni 3 S 2 electrode delivers low apparent anodic overpotentials of 124 and 202 mV at 50 and 100 mA cm −2 , respectively, where OER is coupled with the electrooxidation of ammonia nitrogen and organic pollutants. The CoNiFe@Mo–Ni 3 S 2 -based AEMWE single cell further achieves a current density of 0.5 A cm −2 at 1.74 V. Remarkably, the system simultaneously achieves 92.6% ammonia-nitrogen removal and 51.4% chemical oxygen demand (COD) reduction. Post-reaction Raman, XRD, and XPS analyses reveal that interfacial electronic coupling between crystalline Mo–Ni 3 S 2 and amorphous CoNiFe promotes surface reconstruction into high-valence (Ni, Co, Fe)–OOH species, while the residual sulfide interlayer provides conductive and mechanically robust support. These results demonstrate the potential of CoNiFe@Mo–Ni 3 S 2 for coupling hydrogen production with CGW treatment and resource utilization.
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高影响因子
TALANTA
·
2026
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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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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2026
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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.
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高影响因子
ACS Catalysis
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2016
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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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高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
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2022
·Vol. 648
·期 14
·e202200132
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IF 1.414
Rui Pei,Xinguo Ma,Changcun Han,Zhifeng Liu,Zhengwang Cheng,Xiaoru Dong
Reducing the phase transition temperature ( T c ) of VO 2 films to achieve the application in the field of Smart Home is still a challenge. Thus, in the work, the ultra-thin VO 2 films with different Mo doping amounts were successfully prepared by an economic sol-gel method and atmosphere annealing, aiming to further investigate the mechanism of the decrease of T c . The results show that the VO 2 films with 3 at % Mo doping possess the T c of 29.5 °C. Notedly, in the as-prepared films, the maximum transmittance in the visible region ( T vis ) is 46.3 % and the solar direct transmittance ( T sol ) is 45.8 %. According to the XPS spectra, it is confirmed that the Mo doping prominently induces the valence change of V ions from +4 to +3, inhibiting the strain in the phase transition process of VO 2 films, and leading to the decrease of T c . Our work will provide a feasible solution for reducing the T c of the ultra-thin VO 2 films.
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高影响因子
MINERALS ENGINEERING
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2021
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IF 4.765
Hai Yan,Bingqiao Yang,Huanyu Zhu,Pengliang Huang,Yangjia Hu
A small non-toxic compound dithiothreitol (DTT) was introduced as an environmental-friendly chalcopyrite depressant in Cu-Mo flotation separation. The separation performances were studied via flotation tests. The adsorption mechanism was explored by contact angle, Zeta potential and X-ray photoelectron spectroscopy (XPS) measurements. The flotation results manifested that DTT exhibited strong depression ability on chalcopyrite, but barely influenced the floatability of molybdenite. The contact angle and Zeta potential measurements indicated that DTT mainly adsorbed on chalcopyrite and rendered its surface hydrophilic, while it hardly adsorbed on molybdenite. XPS analysis confirmed that DTT might complex with Cu atoms on chalcopyrite surfaces via the thiol groups. This study demonstrated that DTT was a promising alternative for Na 2 S in Cu-Mo separation, which was more effective and environmentally compatible.
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CHEMOSPHERE
·
2020
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IF 5.778
Jianjun Lian,Heli Wang,Hongping He,Weilin Huang,Mei Yang,Yin Zhong,Ping’an Peng
Iron sulfide (FeS) is an important scavenger for hexavalent molybdate (Mo(VI)) in an anoxic environment; it plays a crucial role in the mobilization and transformation of Mo(VI), although the underlying reaction mechanisms between Mo(VI) and FeS remain unclear. This study investigates the Mo(VI) reaction kinetics with the amorphous FeS over a pH range 5.0–9.0 and Mo’s chemical form on the FeS surface. It is found that the Mo(VI) reaction kinetics with FeS follow a pseudo first-order model, and the reaction rate constant ( k obs ) increases with a decrease in the pH value. The k obs at pH 5.0 is 0.027 min −1 , which is about 38 times higher than that at pH 9.0. The rapid Mo(VI) removal under acidic conditions is due to quick Mo(VI) transformation into stable MoS 2 and thiomolybdate (Mo V O x S y ). The amount of MoS 2 formed on the surface of FeS increases with a decrease in the pH value. Under neutral and alkaline conditions, Mo(VI) is not transformed into MoS 2 by FeS because the precipitation of iron oxy-hydroxide passivates the active sites of FeS. The study also investigates the effect of the initial dosage of FeS (20–200 mg L −1 ) and Mo(VI) (10–50 mg L −1 ) on the reaction kinetics of Mo(VI) with FeS. The results provides important information on the environmental fate of Mo(VI) in the anoxic environment containing amorphous FeS.
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PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 104
·期 6
·2860-2867
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IF 3.502
Da-Wang Tan,Zhen-Yong Lao,Zhan Zhang,Wei-Ming Guo,Shi-Kuan Sun,Hua-Tay Lin
B 4 C-TiB 2 ceramics (TiB 2 ranging 5~70 vol%) with Mo-Co-WC as the sintering additive were prepared by spark plasma sintering. In comparison with B 4 C-TiB 2 without additive, the enhanced densification was evident in the sintered specimen with Mo-Co-WC additive. Core-rim structured grain was observed around TiB 2 grains. The interface of the rim between TiB 2 and B 4 C phases demonstrated different feature: the inner borderline of the rim exhibited a smooth feature, whereas a sharp curved grain boundary was observed between the rim and the B 4 C grain. The formation mechanism is discussed: the epitaxial growth of (Ti,Mo,W)B 2 rim around the TiB 2 core may occur as a result of the solid solution and dissolution-precipitation between TiB 2 phase and the sintering additive. It was revealed that the fracture toughness increased as the content of TiB 2 content increased, alongside the decreased hardness. B 4 C-30 vol% TiB 2 specimen demonstrated the optimal combination of mechanical properties, reaching Vickers hardness of 24.3 GPa and fracture toughness of 3.33 MPa·m 1/2 .
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Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 27
·9337-9344
·
IF 7.059
Aili Wang,Lili Zhao,Hui Liu,Ziqian Zhou,Chengbo Li,Yong Xiang,Weijia Zhou,Feng Hao
The development of low-dimensional non-precious metal catalysts for the hydrogen evolution reaction (HER) is highly desired for clean energy utilization. Herein, we have reported a facile synthesis protocol of Cu–Mo–O (CMO) nanowires and nanosheets on Cu foam (CMOW/CF and CMOS/CF) through a one-step reaction of Cu nanowires with (NH4)6Mo7O24 solution directly under mild conditions. The final product morphology has been tuned by mechanical stirring. The as-synthesized CMOS/CF exhibits a low operating overpotential of 112 mV at a current density of 10 mA cm−2 with a high electrochemical active area of 25.1 mF cm−2 and excellent long-term stability in the 1 M KOH electrolyte. Moreover, by using the CMOS/CF as cathodic and anodic electocatalysts, a two-electrode electrolyzer capable of driving 10 mA cm−2 at a cell voltage of 1.69 V was achieved, along with promising stability. The high performance of the CMOS/CF can be attributed to higher electrochemical area and more Mo catalytic sites induced by mechanical stirring. This work provides a facile method for the synthesis and catalytic site regulation through a simple method of low-dimensional nanomaterials for the HER with relatively high electrochemical active area and catalytic activity.
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高影响因子
SOLID STATE SCIENCES
·
2023
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IF 3.5
Tao Li,Chen Wu,Na Pan,Qianying Hua,Aokui Sun
Molybdenum-copper composites have attracted increasing attention due to their excellent properties in terms of electrical conductivity , thermal conductivity and mechanical property, which are closely related to the density and composition of the sintered material. However, high temperatures are required to obtain high sintering density, resulting in loss of copper in most cases. In this work, a novel core-shell Mo–Cu composite powder was prepared by a ball-milling method followed by hydrogen reduction. The phase compositions and microstructure of prepared powders were studied by XRD , TEM and EDS , and the formation process of core-shell structure of Mo–Cu powders was discussed in detail. It was shown that the significant difference in reduction temperatures between molybdenum and copper oxides contributes to the formation of core-shell structure.
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高影响因子
危险品化学品经营许可证（带存储）