ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xueqian Ji,Yuxing Xu,Hailan Feng,Pengfei Wang,Yuncheng Zhou,Jiechen Song,Qing Xia,Qiangqiang Tan
To improve the initial Coulombic efficiency, cycling stability, and rate performance of the Li-rich Mn-based Li1.2Mn0.54Ni0.13Co0.13O2 cathode, the combination of LiMn1.4Ni0.5Mo0.1O4 coating with Mo doping has been successfully carried out by the sol–gel method and subsequent dip-dry process. This strategy buffers the electrodes from the corrosion of electrolyte and enhances the lattice parameter, which could inhibit the oxygen release and maintain the structural stability, thus improving the cycle stability and rate capability. After LiMn1.4Ni0.5Mo0.1O4 modification, the initial discharge capacity reaches 272.4 mAh g–1 with a corresponding initial Coulombic efficiency (ICE) of 84.2% at 0.1C (1C = 250 mAh g–1), far higher than those (221.5 mAh g–1 and 68.9%) of the pristine sample. Besides, the capacity retention of the coated sample is enhanced by up to 66.8% after 200 cycles at 0.1C. Especially, the rate capability of the coated sample is 95.2 mAh g–1 at 5C. XRD, SEM, TEM, XPS, and Raman spectroscopy are adopted to characterize the morphologies and structures of the samples. This coating strategy has been demonstrated to be an effective approach to construct high-performance energy storage devices.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haoran Yu,Shuo Liu,Ali Yaraş,Linchao Hu,Wenyi Zhang,Mingguo Peng,Hasan Arslanoğlu,Qingqing Huang,Bolormaa Oyuntsetseg,Bingying Gao,Linqiang Mao
Spent hydrodesulfurization (HDS) catalyst contains considerable amounts of Mo, Ni and V, is an important secondary resource for these valuable metals. Direct acid solution leaching method exhibits poor separation effect from catalyst carrier for Mo due to greater stability of MoS 2 . This study explored Mo leaching efficiencies from spent HDS catalyst by Fenton-like oxidation systems (H 2 O 2 and K 2 S 2 O 8 ), which were frequently employed in the wastewater treatment. To further improve Mo leaching efficiency, nano zero-valent iron (nZVFe) was used to activate H 2 O 2 /K 2 S 2 O 8 and produce more free radicals (·OH and ·SO 4 - ). Approximate 96.0 % and 93.3 % of Mo were leached from spent HDS catalyst in nZVFe + H 2 O 2 + H 2 SO 4 and nZVFe + K 2 S 2 O 8 + H 2 SO 4 systems under optimal experimental conditions, increased by 16.2 % and 8.2 % than normal H 2 O 2 (79.8 %) and K 2 S 2 O 8 (85.1 %) system without nZVFe. The leaching process of Mo in both nZVFe + H 2 O 2 + H 2 SO 4 and nZVFe + K 2 S 2 O 8 + H 2 SO 4 systems conformed to the shrinkage core model. Kinetic analysis and molecular calculation demonstrated the leaching process of Mo in nZVFe + H 2 O 2 + H 2 SO 4 system was driven by chemical reaction and solid film diffusion, and the leaching and oxidation reactions of MoS 2 occurred simultaneously. However, the leaching process of Mo in nZVFe + K 2 S 2 O 8 + H 2 SO 4 system was driven only by chemical reaction, solid MoS 2 was firstly dissolved into Mo 4+ by H + , and then oxidized into Mo 6+ by ·SO 4 - . The economic and environmental impacts evaluation indicated that the separation of Mo from spent HDS catalysts by nZVFe + H 2 O 2 + H 2 SO 4 was assigned as a better choice than normal H 2 O 2 and K 2 S 2 O 8 system without nZVFe due to higher leaching efficiency and lower cost.
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Chemical Science
·
2025
·
IF 7.4
Yang Sun,Fan Yang,Kexin Wei,Siyuan Sun,Li Sun,Junpu An,Chunhui Yu,Qing Guo,Conghan Zhang,Guang Ma,Hongchen Liu,Yongfeng Li
Constructing an asymmetric charge distribution and built-in electric field (BIEF) has proven to be an effective strategy for enhancing the catalytic performance of both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalysts. Herein, a Mo-doped Ni/WO3 heterojunction catalyst was immobilized on Ni foam for enhancing the performance of the HER and OER. The constructed Ni/WO3 heterointerface facilitates electron transport, while the incorporation of Mo further amplifies charge asymmetry in the interfacial region. The optimized Mo3–Ni/WO3 catalyst exhibits excellent performance, requiring only 13 mV and 328 mV overpotential to reach current densities of 10 and 100 mA cm−2 for the HER and OER, respectively. Besides, it maintains stable overall water splitting performance at 100 mA cm−2 for 90 h. The asymmetric distribution of Ni/WO3 interfacial charge is promoted and electron transport is enhanced by Mo doping. Theoretical results show that element doping in the heterostructure turns W sites into additional adsorption centers, optimizing the energetics of H* adsorption during the HER. Mo doping reduces the work function (φ) of Mo3–Ni/WO3, promoting efficient electron transfer and lowering the energy barrier for intermediate formation, thereby enhancing OER activity. This strategic modulation of charge asymmetry in heterojunction architectures provides a new approach for the rational design of high-performance bifunctional electrocatalysts.
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Weitao Kong,Zhongmou Liu,Jinghui Wu,Chenying Wen,Juncheng Yan,Yidi Gao,Guanqiao Li,Xianze Wang,Mingxin Huo
This study investigates the degradation of sulfamethoxazole (SMX), a widely detected and persistent antibiotic in the environment, using a novel photocatalytic system based on MIL-101(Fe) supported Mo single-atom with oxygen vacancies (Mo/Ov-MOF). Anchoring Mo single-atoms into the MOF structure enhances catalytic activity by effectively improving charge separation and reducing electron-hole recombination. The Mo/Ov-MOF efficiently activates peroxymonosulfate (PMS) under visible light, generating singlet oxygen ( 1 O 2 ) as a primary reactive species responsible for SMX degradation. Degradation experiments demonstrated that the degradation efficiency reached 96.8 % in the presence of PMS and visible light. Through quenching and trapping experiments on active species, an in-depth investigation into the source of 1 O 2 was performed, demonstrating the crucial role of holes in the rapid and selective generation of 1 O 2 under visible light. Additionally, the reusability of the Mo/Ov-MOF catalyst was confirmed, maintaining over 70 % degradation efficiency after five cycles. Toxicity assessments indicated that the degradation by-products exhibited significantly lower toxicity than the parent compound SMX, thus mitigating potential ecological risks. The mechanistic insights reveal that oxygen vacancies and Mo single-atom enhance electron transport and facilitate efficient PMS activation, ultimately leading to effective pollutant degradation. The findings underscore the potential of the Mo/Ov-MOF photocatalytic system for practical applications in wastewater treatment, particularly for removing persistent organic pollutants from aquatic environments.
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高影响因子
Progress in Natural Science-Materials International
·
2021
·
IF 3.607
Hairus Abdullah,Chi-Ning Hsu,Hardy Shuwanto,Noto Susanto Gultom,Worku Lakew Kebede,Chang-Mou Wu,Chiu-Chun Lai,Ri-Ichi Murakami,Masayuki Hirota,Antonio Norio Nakagaito,Dong-Hau Kuo
Relatively small amounts of In-doped Mo(O,S) 2 (IMS) catalysts (10%, 20%, and 30%) were deposited on cellulose nanofiber (CNF) by cross-linking them with functional groups of siloxane and epoxy to form CNF-IMS hybrid composites. The as-prepared hybrid composites were characterized and tested their performances toward the photo degradations of cationic (MB and RhB) and anionic (MO) dyes. As indium was doped into Mo(O,S) 2 lattice to form solid-solution, the charge transfer and photocarrier separation during the catalytic reaction were simultaneously enhanced as probed with electrochemical impedance spectroscopy and photoluminescence measurements, respectively. To ensure the catalyst on CNF was well deposited and recyclable, the hybrid composite was evaluated with a reusability experiment to show the stability performance in degrading organic dyes. It was found the environmentally friendly CNF-IMS hybrid composite was relatively stable during the reusability experiment, indicating no catalyst powder was leached out during the photocatalytic reaction. The photoreaction mechanism was convinced by radical-scavenging experiments to show that hydroxyl and superoxide played essential roles for the organic dye degradations in visible-light illuminated conditions. The cross-linked organic/inorganic hybrid catalyst showed a prospective visible light active material not only to solve the environmental issue due to the leaching of nanoparticles but also to lower the post-treatment/recycling cost of photocatalyst in industrial application.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 8
·5422-5429
·
IF 2.1
Xu Jiaxiong,Wu Xiaoshuai
Chalcogenide Cu 2 ZnSn(S,Se) 4 (CZTSSe) is a promising absorber material for photovoltaic applications. When CZTSSe thin film is deposited on an Mo substrate, a Mo(S,Se) 2 layer easily forms between the CZTSSe and the Mo, which is detrimental to the back contact property of the CZTSSe. This work proposes a useful way to inhibit the formation of Mo(S,Se) 2 by sputtering a CuCrO 2 layer on a Mo-foil substrate before the deposition of the CZTSSe. The effects of CuCrO 2 thickness on the crystalline structures, morphologies, and electrical properties of the fabricated samples were studied. The results showed that the insertion of the CuCrO 2 layer prevented the formation of Mo(S,Se) 2 . As the thickness of the CuCrO 2 increased, the thickness of the Mo(S,Se) 2 layer decreased. The Mo(S,Se) 2 layer was absent from the cross-sectional scanning electron microscopy image when the CuCrO 2 thickness exceeded 85 nm. The back contact resistance of CZTSSe decreased monotonously as the CuCrO 2 layer thickened due to the reduction in the Mo(S,Se) 2 layer thickness. Therefore, by inserting a CuCrO 2 layer to separate the CZTSSe and the Mo-foil, the formation of the Mo(S,Se) 2 layer between them was effectively suppressed, and the back contact properties of the CZTSSe thin film were significantly enhanced.
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EES Catalysis
·
2025
·
IF 8.1
Guangxun Sun,Peng Xue,Changle Yue,Yang Li,Hongfu Shi,Xin Zhang,Fengyu Tian,Junxi Li,Zekun Guan,Bin Liu,Zhi Liu,Yunqi Liu,Yuan Pan
The development of a synergistic coupling catalyst at the atomic scale for slurry-phase hydrogenation of vacuum residue (VR) is extremely challenging. Herein, we designed and constructed a robust coupling catalyst comprising Mo single atoms and MoS2 (Mo SAs–MoS2) using a reaction induction transformation strategy. The spontaneous generation of Mo SAs–MoS2 synergistically promoted H2 activation and enhanced local active hydrogen concentration in the hydrogenation of VR. Benefiting from the strong hydrogen concentration distribution in MoS2 and Mo SAs, the catalyst revealed remarkable hydrogenation performance toward VR with a TOFT of up to 0.39 s−1, liquid product yield of 92 wt%, and coke content of 0.6 wt%. Theoretical calculations revealed that the synergistic action of Mo SAs–MoS2 facilitated electron transfer between Mo species and reactants, reducing the desorption energy barriers for H2 and anthracene and thereby promoting the hydrogenation of VR. This work provides a novel idea for the design of efficient coupling catalysts for strengthening local active hydrogen concentration in the hydrogenation of VR, and this concept can be applied to other hydrogenation systems.
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Small
·
2017
·Vol. 13
·期 32
·1701246
·
IF 8.643
Chunli Wang,Lianshan Sun,Feifei Zhang,Xuxu Wang,Qujiang Sun,Yong Cheng,Limin Wang
Highly uniform hierarchical Mo–polydopamine hollow spheres are synthesized for the first time through a liquid-phase reaction under ambient temperature. A self-assembly mechanism of the hollow structure of Mo–polydopamine precursor is discussed in detail, and a determined theory is proposed in a water-in-oil system. Via different annealing process, these precursors can be converted into hierarchical hollow MoO 2 /C and Mo 2 C/C composites without any distortion in shape. Owing to the well-organized structure and nanosize particle embedding, the as-prepared hollow spheres exhibit appealing performance both as the anode material for lithium-ion batteries and as the catalyst for hydrogen evolution reaction (HER). Accordingly, MoO 2 /C delivers a high reversible capacity of 940 mAh g −1 at 0.1 A g −1 and 775 mAh g −1 at 1 A g −1 with good rate capability and long cycle performance. Moreover, Mo 2 C/C also exhibits an enhanced electrocatalytic performance with a low overpotential for HER in both acidic and alkaline conditions, as well as remarkable stability.
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Coatings
·
2026
·Vol. 16
·期 1
·138
·
IF 2.8
Hadja Kaka Abanchime Zenaba,Mi Long,Xue Liu,Mengying Xu,Wen Luo,Tian Zhang
Developing efficient heterojunction photocatalysts is essential to address the challenge of degrading persistent organic pollutants. In this study, a multi-scale characterization strategy was employed to investigate the implications of interfacial connectivity between synthesized graphitic carbon nitride (g-C3N4) /bismuth oxychloride (BiOCl)e removal of Rhodamine B (RhB) and Methyl Orange (MO). Morpho-structural characterizations, including Scanning/Transmission Electron Microscopy (SEM/TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and N2physisorption (Brunauer–Emmett–Teller (BET)) analyses, confirmed the successful construction of an intimate interfacial contact between g-C3N4and BiOCl. The optimized composite (15% g-C3N4/BiOCl), prepared via a one-step hydrothermal method, exhibited enhanced photocatalytic performance following pseudo-first-order kinetics described by the Langmuir–Hinshelwood model, with apparent rate constants of 0.166 min−1for MO and 0.519 min−1for RhB. Under visible-light irradiation, degradation efficiencies of 98% for MO (120 min) and 99% for RhB (35 min) were achieved, outperforming the pristine components. Complementary optical and electrochemical analyses indicate improved light absorption and charge-separation efficiency in the heterojunction system. In addition, the photocatalyst demonstrated good operational stability over four consecutive cycles, maintaining 91.70% activity for MO and 99.76% for RhB. Overall, this work highlights the synergistic photocatalytic g-C3N4/BiOCl heterojunction and provides a valuable insight to guide the design of advanced materials for pollutant remediation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Bingbing Liu,Suying Dong,Peiying Li,Shengpeng Su,Wenjuan Wang,Shuzhen Yang,Yanfang Huang,Hu Sun,Guihong Han
Indium (In) is a typical critical metal, and the recycling of waste In-Tin oxide (ITO) target can alleviate the In resource supply scarcity. The dismantling and preprocessing of waste ITO targets inevitably introduce metallic impurities, posing significant challenges for In recovery, particularly the separation of In from Sn and the removal of other impurities. This study developed an integrated hydrometallurgical process to prepare high-purity nano-In 2 O 3 from high-impurity waste ITO, highlighting on the leaching and separation mechanisms of In, Sn, Al, and Mo. The process consists of HCl leaching for Mo separation, selective sulfide precipitation for In/Sn separation, TOA/TBP synergistic extraction for In/Al separation, and calcination for nano-In 2 O 3 preparation. Under optimal conditions, HCl leaching extracted over 94% of In, Sn, and Al while selectively suppressing Mo dissolution to below 13%. The HCl leaching, sulfide precipitation, and solvent extraction mechanisms are also discussed in this study. The final In 2 O 3 product was 99.98% pure, with about 25 nm average particle size and 77.8% overall In recovery. This work provides an efficient route for high-purity nano-In 2 O 3 production from high-impurity wastes.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Zichen Wang,Hongbin Li,Wei Ma,Yinglong Wang,Peizhe Cui,Jianguang Qi,Zhengrun Chen,Zhaoyou Zhu,Fanqing Meng
Peroxymonosulfate (PMS) activation have provided a new direction to eliminate the organic pollutant . Current challenges that must be solved include secondary pollution by the metal ions and limitation in the recyclability of the catalysts. The waste 1D-FeOOH adsorbent with adsorption of metal elements (As, Cr or Mo ions) has been reused as an efficient electro-catalyst for PMS activation and used to metronidazole (MTD) degradation for the first time. The effects of current density, initial reaction pH, stirring rate, PMS dosage and solution temperature on MTD degradation was studied. The used 1D-FeOOH with adsorption of Mo ions showed the highest PMS activation ability and 99.6% MTD could be removed after 30 min degradation. The •OH and Found that SO 4 •− is the main free radical for MTD degradation. DFT calculation and characterization results were demonstrated that the high PMS electro-catalysis activation ability of the 1D-FeOOH@Mo has resulted from the special composition-dependent interactions among FeOOH@Mo and PMS, including stable adsorption properties, easy electron transfer and weak O O bond. The possible PMS electro-catalysis activation mechanism and MTD degradation pathway have been proposed. (ECOSAR) was used to evaluate the toxicity of metronidazole during degradation. The results showed that the toxicity of MTD and its intermediates could be effectively reduced by prolonging the degradation time in 1D-FeOOH@Mo solution. This work provides new insights for waste adsorbent disposal and gives a new perspective for PMS activation to degradation of antibiotics in water.
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高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 30
·6459-6468
·
IF 5.344
Xiaodan Zhang,Yuwan Lu,Qiumeng Chen,Yuming Huang
A self-templated strategy was adopted to design hollow Co3O4/MO3 (M = Mo, W) mixed-metal oxides via the Mo or W doping of ZIF-67, and subsequent pyrolysis under an atmosphere of air at a low temperature of 450 °C. The hollow Co3O4/MO3 (M = Mo, W) mixed-metal oxides displayed tunable oxidase-like and peroxidase-like activities able to efficiently catalyze the oxidation of TMB to generate a deep blue color in the absence or presence of H2O2. Relative to that of the un-doped Co3O4, the oxidase mimic activity of the Mo-doped Co3O4 increased to 1.3 to 2.1-fold, while its peroxidase mimic activity increased to 7.1 to 19.9-fold, depending on different Mo doping amounts. The oxidase mimic activity of the W-doped Co3O4 increased to 2.1 to 2.3-fold, while its peroxidase mimic activity increased to 4.8 to 5.9-fold, depending on the different W doping amounts. The Mo- and W-doped Co3O4 nanohybrid exhibited both higher O2 and H2O2 activating capability, and their H2O2 activating capacity was superior to the O2 activating capability. Furthermore, the Mo- and W-doped Co3O4 nanohybrids exhibited similar O2 activating abilities, while the Mo-doped one displayed a higher H2O2 activating capability than the W-doped one. The discrepant peroxidase-like nature of Mo- and W-doped Co3O4 nanohybrids is likely attributed to their different catalytic mechanisms. The peroxidase-like activity of Mo-doped Co3O4 is highly related to the ˙OH free radical, while that of W-doped Co3O4 is likely ascribed to the electron transfer between TMB and H2O2. The Km values of Co3O4/MoO3 for TMB and H2O2 were 0.0352 mM and 0.134 mM, which were 3.2- and 1.9-fold lower than that of pure Co3O4, respectively. A Co3O4/MoO3-based colorimetric platform was developed for the determination of H2O2 in the 0.1–200 μM range, with a limit of detection of 0.08 μM (3σ). Based on the thiocholine (TCh) inhibition of the excellent peroxidase-like activity of Co3O4/MoO3 and the TCh generation via acetylcholinesterase (AChE) catalyzed hydrolysis of acetylthiocholine chloride (ATCh), the colorimetric platform was extended to screen AChE activity and its inhibitor.
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高影响因子
危险品化学品经营许可证（带存储）