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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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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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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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
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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PubMed
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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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Fei Liu,Thien-Phap Nguyen,Qin Wang,Florian Massuyeau,Yi Dan,Long Jiang
Constructing a conductive interface is crucial for the transfer of photoexcited charges in the photocatalytic heterojunction system. In this study, we introduced Ag into g-C 3 N 4 /P3HT system to construct a conductive interface which benefits for transfer of photoexcited charges between g-C 3 N 4 and P3HT. A series of characterizations were employed to investigate the chemical structure , morphology and optical property of the obtained catalysts. And the photocatalytic activity of the as-prepared g-C 3 N 4 /Ag/P3HT composites were evaluated by the degradation of tetracycline (TC) and methyl orange (MO) aqueous solution under visible light irradiation. Results show that the g-C 3 N 4 /Ag/P3HT exhibits a broad absorption band in the region of 400–700 nm and the photocatalytic activity of g-C 3 N 4 /Ag/P3HT obtains a great improvement comparing with that of g-C 3 N 4 , g-C 3 N 4 /Ag and g-C 3 N 4 /P3HT. In addition, the optimized loading content of P3HT is 0.3 mass% based on g-C 3 N 4 . The enhanced photocatalytic performance is due to the introduction of Ag, which improves the transfer of photoexcited charges between g-C 3 N 4 and P3HT. The active species trapping experiment shows that the main active specie is O 2− . After five recycling experiments, the g-C 3 N 4 /Ag/P3HT shows high stability in the photocatalytic performance.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Sijie Liu,Renda Wang,Ping Yu,Kun Liang,Li Wang,Mengyu Gao,Yang Si,Chuang Zhu,Fangfang Ge,Bingsheng Li
In this study, molybdenum (Mo) coatings were deposited on 304 stainless steel (304SS) plates using magnetron sputtering. Subsequently, the samples were annealed at 800 °C under vacuum for varying durations to enhance adhesion strength and thermal stability. Immersion tests were conducted at 700 °C for up to 800 h. After 200 h of immersion, the weight loss of the annealed Mo-coated 304SS was significantly reduced from approximately 11 mg/cm 2 to about 0.44 mg/cm 2 . The Mo-enriched layer effectively suppressed the outward diffusion of alloy elements and facilitated the formation of Cr 2 O 3 by trapping Cr in the interdiffusion layer. Additionally, the Mo 3 Fe 3 O phase formed on the coating surface via diffusion reaction exhibited certain corrosion-resistant properties. Obvious interfaces emerged within the interdiffusion layer, and their formation mechanisms were analyzed. After four thermal cycles (with a 200-h interval), partial delamination of the Mo-enriched layer in the annealed Mo-coated 304SS was observed. This may have resulted from the substantial growth stress of Cr 2 O 3 and the significant mismatch in thermal expansion coefficient between Mo coating and 304SS.
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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
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Shihao Miao,Yuanguang Zhang,Hongyu Xia,Hongcheng Gao,Weihao Tao,Zhenzhu Zhang,Chenyu Huang,Lin Huang
In the study, highly N-doped metal organic framework (MOFs) derived CoFeN photocatalysts (CoFeN-N) were successfully prepared by using carbon nitride (g-C 3 N 4 ) nanosheets as the support with simultaneous additional N source. CoFeN-N activated hydrogen peroxide (H 2 O 2 ) was used to remove Methyl orange (MO) and Tetracycline hydrochloride (TC-HCl) in water under simulated visible light . N doping improves the photo-Fenton degradation ability of CoFeN to varying degrees, and the photocatalyst with the best performance is CoFeN-N2. The degradation rate constants (K) of MO and TC-HCl are 1.8 and 5.1 times of CoFeN, respectively. CoFeN-N2 did not significantly inhibit the degradation efficiency of organic pollutants under acidic, neutral and alkaline conditions. Meanwhile, the presence of coexisting anions (Cl − 、HCO 3 - and HPO 4 2- ) in water similarly does not obviously reduce the degradation ability of CoFeN-N2 for MO and TC-HCl, which indicates the excellent anti-interference ability of the prepared photocatalyst. The TOC test results indicate that CoFeN-N2 has excellent mineralization ability for organic contaminants. In addition, hydroxyl radicals , superoxide radicals, and holes (·OH, ·O 2 - and h + ) were demonstrated to be the primary active species for the degradation of organic pollutants by CoFeN-N2 through free radical trapping experiments and EPR tests. This work provides an attractive strategy for the preparation of highly N-doped photocatalysts and the efficient removal of organic pollutants from water by photo-Fenton coupling.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Duoli Wu,Yi Li,Ziyi Yuan,Liao Xiang,Xinlong Wei,Chao Zhang
The study examined the impact of varying molybdenum content (0 %, 5 %, and 10 % wt) on the high-temperature corrosion resistance of APS-sprayed Ni-clad Al coatings. The coatings were exposed to a simulated biomass-firing environment with pure KCl deposition at 600 °C for 168 h, and a mixed gas containing 15 % water vapor was passed through. The findings revealed that increasing Mo content improved the coating's high-temperature corrosion resistance. The coating with 10 % Mo displayed a continuous layer of Ni and Al oxides on its surface, while KCl was concentrated in the Mo region. Based on the experimental results, a mechanism for how the presence of Mo element contributes to the high-temperature corrosion resistance of NiAl coatings was proposed.
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高影响因子
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