JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Yingnan Zhao,Xinyu Zhao,Zhongling Lang,Huiying Sun,Zhilu Du,Huaqiao Tan,Tianyu Qiu,Wingkei Ho,Zhao Zhao,Yonghui Wang
Phase junction can effectively improve spatial charge separation due to its good lattice matching at the interface. Developing phase junction materials with good visible light absorption and suitable electronic band structure is greatly important for photocatalytic environmental purification. In this work, we combined the P and I phases of Cu 2 MoS 4 (CMS) by one-step solvothermal in situ phase transition route. The as-prepared samples are labeled as CMS-X, where X represents the reaction time (X = 2, 4, 6, 8, 10, 12, 24 h). XRD , SEM, HRTEM , and XPS confirmed the existence of the phase junction structure. Photocatalytic experiments revealed that the phase junction samples exhibit excellent photocatalytic performance and durability for methyl orange (MO) and tetracycline (TC) degradation. Among the samples, CMS-8h showed optimal phase composition and the best photocatalytic degradation performance. Approximately 50 ml of 20 ppm MO can be completely degraded within 8 min under visible light irradiation, which is approximately 12.5 and 10 times faster than that of pure phase P-CMS and I-CMS respectively, presenting the best photocatalytic efficiency of CMS. Photocatalytic mechanism studies combined with theoretical calculations demonstrated that CMS-8h (PI-CMS) possesses a typical type-II heterojunction structure, which significantly accelerates the separation of photogenerated carriers and reduces their radiation recombination. The synergistic effect of the advantages of each phase and optimized interfacial band alignment endow PI-CMS with highly efficient and long-lasting photocatalytic activity for organic pollutant degradation.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Guang Yang,Mingyu Dou,Xiaojie Liu,Hua Yang,Xiaosen Duan,Hengyi Wang,Ruixin Yang,Erkang Liu,Baochen Han,Xingliang Yin,Lingqian Kong,Dacheng Li,Jianmin Dou
The photocatalytic hydrogen production performance of semiconductor materials can be improved by co-catalyst modification. In most of the studies, the size of the co-catalyst is relatively small compared to the primary catalyst. However, in this study, we employed a novel strategy by synthesizing a relatively large-sized Cu 2 MoS 4 as the co-catalyst and in situ loading smaller-sized Zn 0.5 Cd 0.5 S onto Cu 2 MoS 4 , verifying that Cu 2 MoS 4 enhances the photocatalytic hydrogen production efficiency of Zn 0.5 Cd 0.5 S. It can be observed by scanning electron microscopy (SEM) that the lateral size of 2D Cu 2 MoS 4 is at least 50 times larger than the Zn 0.5 Cd 0.5 S nanoparticle particle size. In addition, Density Functional Theory (DFT) calculations have demonstrated that the active site for hydrogen production in the composite is located in Cu 2 MoS 4 . The large-sized of Cu 2 MoS 4 not only provides more active sites but also broadens the electron transport channel, which is conducive to promoting the transfer of photogenerated electrons from Zn 0.5 Cd 0.5 S. This work enriches the study of large-sized materials as co-catalyst and provides a strategy for the construction of composite catalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Ren Hao Xu,Pian Pian Ma,Guan Fu Liu,Yin Qiao,Rui Yang Hu,Li Yuan Liu,Muslum Demir,Guo Hua Jiang
The tetragonal layered transition metal copper–molybdenum sulfide Cu2MoS4 (CMS) possesses a high theoretical electrochemical potential because of its abundant redox properties and large layered surface area, which is favorable for ion adsorption/desorption and transport. Cu2MoS4 contains P and I phases, exhibiting different crystal structures, ion transport characteristics, and electrochemical properties accordingly. In this work, for the first time, Cu2MoS4 electrode materials with dual-phase compositions are designed and prepared for supercapacitor application, providing a synergistic effect with high electron transport efficiency and structural stability. Upon an in-depth optimization process, the optimal CMS-4 sample having P and I phases coexisting yields the optimal electrochemical behavior. The CMS-4@carbon cloth (CC) electrode provides a specific capacity of 33.9 mAh g–1 at 1 A g–1, which is 12.6 and 4.0 times higher than the pure P and I phases, respectively. The assembled MnO2@CC//CMS-4@CC supercapacitor exhibits a high energy density of 16.8 Wh kg–1 at 800 W kg–1 power density. The results demonstrate that two-phase coexistence of Cu2MoS4 significantly enhances the electrochemical activities owing to the synergistic effects of P and I phases and provides a promising material for supercapacitor negative electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Reaction Chemistry & Engineering
·
2023
·Vol. 8
·期 4
·933-942
·
IF 3.9
Meng-Yuan Zhu,Feng-Jun Zhang,Ying-Rui Wang,Ze-da Meng,Chao-qun Mi
Transition metal sulfides are widely used in visible photocatalysis due to their suitable forbidden band widths. In this work, square platform Cu2MoS4/lamellar ZnIn2S4 composites were successfully prepared by solvent thermal and self-assembly methods. The crystalline shape, microstructure and optoelectronic properties of the composites were explored by XRD, SEM, TEM, XPS, and photocatalytic hydrogen evolution performance experiments. The results show that the absorption of the composite material in the visible region is significantly enhanced compared with that of the pure sample, and the specific surface area reaches 58.39 m2 g−1, which is about 3 times that of pure Cu2MoS4, providing more reaction adsorption sites. Photocatalytic hydrogen evolution experiments show that the best performance was achieved when Cu2MoS4 : ZnIn2S4 = 4 : 6. Namely, the composite CMS/ZIS-2 exhibited the highest hydrogen evolution performance of 3104.25 μmol h−1 g−1, which was about 434 and 13 times higher than the pure Cu2MoS4 and ZnIn2S4 photocatalytic performance, respectively. The improved performance is mainly attributed to the loading of lamellar ZnIn2S4 on the surface of Cu2MoS4, which organically combine to form a heterojunction, enhancing the light absorption in the visible region and suppressing the complexation of photogenerated carriers, thus improving the photocatalytic hydrogen evolution efficiency.
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Korean Ceramic Society
·
2025
·
IF 3.8
Zhang Feng-Jun,Zhang Jun-Jie,Zhu Meng-Yuan,Wang Ying-Rui,Li Dong-Cai,Oh Won-Chun
Cu 2 MoS 4 became a novel active alternative material to noble metal co-catalysts, which can effectively promote photocatalytic hydrogen evolution. To investigate the effect of Cu 2 MoS 4 on the photocatalytic performance of Zn-VIA compounds, ZnO, ZnS, ZnSe, and ZnTe were composited with Cu 2 MoS 4 to construct the photocatalysts, and we analyzed the four catalysts for the crystal structure, microscopic morphology, photoelectronic properties, and hydrogen evolution performance. Comparing the four different photocatalysts, the composite of ZnSe and Cu 2 MoS 4 has the highest photocatalytic hydrogen evolution efficiency, and the hydrogen evolution rate of the optimal ratio of ZSeC-20 reaches about 2617 μmol/g/h, which is about 46 times higher than that of pure ZnSe. It is attributed to the loading of Cu 2 MoS 4 to build a heterogeneous structure, which reduces the photogenerated electron and hole recombination rate, which enhances the photocatalytic water splitting hydrogen evolution rate.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2018
·Vol. 25
·期 3
·310-314
·
IF 1.261
Li Shi-na,Ma Rui-xin,Wang Cheng-yan
The Cu 2 MoS 4 nanoparticles were prepared using a relatively simple and convenient solid-phase process, which was applied for the first time. The crystalline structure, morphology, and optical properties of Cu 2 MoS 4 nanoparticles were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, and UV-vis spectrophotometry. Cu 2 MoS 4 nanoparticles having a band gap of 1.66 eV exhibits good photocatalytic activity in the degradation of methylene blue, which indicates that this simple process may be critical to facilitate the cheap production of photocatalysts.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2023
·
IF 3.5
Meng-Yuan Zhu,Ya-Ru Li,Feng-Jun Zhang,Ying-Rui Wang
In order to enhance the interfacial coupling of heterojunctions , Cu 2 MoS 4 /CdS heterojunction was constructed by solvothermal method and sulfurizing CdIF and the crystal structure, microstructure and photoelectric properties of the material were characterized. The results showed that CdS was homogeneously loaded on the surface of Cu 2 MoS 4 , the absorption of the composite material in the visible light region was significantly enhanced, and the recombination rate of photogenerated carriers was obviously reduced. The research showed the best photocatalytic hydrogen evolution performance When the addition amount of Cu 2 MoS 4 is 0.10 mmol, the best photocatalytic hydrogen evolution performance is 10.03 mmol/h/g, which was 21.45 times higher than that of pure CdS. The improved performance is mainly due to the highly dispersed loading of CdS on the surface of Cu 2 MoS 4 , which organically combines to build a heterogeneous interface with close contact, enhancing the separation efficiency of photogenerated holes and carriers, while suppressing the photocorrosion of Cu 2 MoS 4 and maintaining the long-term stability of hydrogen evolution performance to achieve high-efficiency hydrogen evolution.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Yanfei Zhao,Qi Wang,Congrong Lu,Kuankuan Ren,Shiyan Liu,Chunhe Li,Wei-Dong Dou
The development of photocatalysts with high charge separation efficiency and visible-light-harvesting capacity is still a great challenge. In this work, we report a simple hydrothermal treatment to decorate the CdS nanowires (NWs) with co-catalyst Cu2MoS4 nanosheets (NSs) for photocatalytic H2 evolution reaction (HER). Especially when the molar ratio of Cu2MoS4 to CdS is 3%, the Cu2MoS4/CdS shows excellent visible light-driven H2 evolution activity (1967.83 μmol g–1 h–1), which is 18.8 times higher than that of pure CdS. Structural characterizations demonstrate a well-designed structure of the Cu2MoS4/CdS, in which Cu2MoS4 NSs are tightly attached onto the CdS NWs to form a heterojunction. The optical property reveals that the 3%-Cu2MoS4/CdS nanocomposite displayed distinguished visible-light absorption capacity. Combined with the data analysis of the photoluminescence spectra, photocurrents, and electrochemical impedance spectra, it can be proved that there is effective separation of photogenerated electron–hole pairs in 3%-Cu2MoS4/CdS nanocomposite. All these factors synergistically boost the photocatalytic H2 evolution performance of the Cu2MoS4/CdS, providing a new concept for the rational design of highly efficient visible-light-driven sulfide photocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 44
·18883-18889
·
IF 2.7
Zening Wang,Shoushuang Huang,Hongyong Wang,Minghong Wu
Transition metal sulfides are promising non-noble metal catalysts for hydrogen production through electrochemical water splitting due to their rich redox behaviors, good conductivity and stability. Herein, mesoporous Cu2MoS4 nanocubes were rapidly synthesized at room temperature via a novel electron beam irradiation-assisted method. During the electron beam irradiation process, a large number of free radicals were produced. These radicals are highly active and effectively accelerate the rapid formation of Cu2MoS4 nanocubes with I-phase. The as-obtained Cu2MoS4 nanocubes presented a mesoporous structure, which not only provides abundant electrocatalytic active sites but also facilitates the diffusion of electrolyte and the overflow of H2 bubbles. As a result, the titled catalyst exhibits good electrocatalytic activity toward the hydrogen evolution reaction (HER) in acidic, neutral and alkaline electrolytes. Specifically, the catalyst with an irradiation dose of 300 kGy exhibited the best HER performance with low overpotentials of 160.2 mV, 256.2 mV and 225 mV to achieve a current density of 10 mA cm−2 in 0.5 M H2SO4, 1 M PBS and 1 M KOH, respectively. This work demonstrates the effectiveness of electron beam-assisted synthesis in producing well-defined nanostructured catalysts for water splitting.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Hongduo Yao,Xiaoxue Wang,Jianping Gao,Chunjuan Gao,Ruiru Zhao,Xiangang Zhai,Yongli Wu,Chaoyue Hao,Jiangbing Yang,Shunkang Mei,Haixia Qiu
Waste water treatment with adsorbents has become one of the most effective methods. In this work, we have reported the preparation of the flower-like Cu 2 MoS 4 /g-C 3 N 4 composites. The Cu 2 MoS 4 nanosheets were arranged in a flower-like structure by a simple one-step hydrothermal synthesis method and attached to g-C 3 N 4 nanosheets. The as-prepared flower-like Cu 2 MoS 4 /g-C 3 N 4 composites was found to have potential for the adsorption of RhB in aqueous solution. The microstructure of the product was analyzed by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, X-ray photoelectron spectroscope (XPS), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET). The effects of the ratio of the composite material, the initial concentration of the dye and the contact time were explored. The Langmuir maximum adsorption capacity of the flower-like Cu 2 MoS 4 /g-C 3 N 4 composites for RhB was reached 420.2 mg/g. Moreover, the adsorption process is consistent with the pseudo second-order kinetic model, the Langmuir isotherms model and the Freundlich isotherms model.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 24
·9574-9582
·
IF 3.069
Jiamin Zhou,Gang Xu,Zewu Zhang,Hongyong Wang
The rational design and preparation of low-cost and high-performance electrocatalysts are critical for hydrogen production. Herein, a novel Cu2MoS4/MWCNT electrocatalyst was synthesized by utilizing a facile and environmentally friendly solvothermal method. The as-obtained Cu2MoS4/MWCNTs could act as a high-efficiency electrocatalyst for hydrogen evolution reaction (HER) with a small Tafel slope of 48 mV dec−1 and a low overpotential of 247 mV at a current density of 10 mA cm−2. The high HER performance of Cu2MoS4/MWCNTs could be attributed to their large electrochemical surface area (ECSA), their unique conductive structure and the strong interfacial interaction between Cu2MoS4 and MWCNTs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shikai Wang,Dafeng Zhang,Ping Su,Xintong Yao,Junchang Liu,Xipeng Pu,Hengshuai Li,Peiqing Cai
The reasonable design and fabrication of heterojunction could regulate the photocatalytic performance to some extent, yet it is still a great challenge to construct the S-scheme heterostructure with the stable as well as tight interface on the surface of semiconductor photocatalysts. Herein, the ZnIn 2 S 4 /Cu 2 MoS 4 (ZIS/CMS) S-scheme heterostructure was fabricated by in-situ assembling ZIS nanosheets on the CMS plates, obtaining a mossy tile-like morphology. Owing to the compact interface resulting from in-situ growth, this unique architecture efficiently facilitated the separation and transfer of light-induced charges, guaranteed the larger interface area, and enriched the active sites for photocatalytic redox reactions. After adjusting the mass ratio of CMS in ZIS/CMS, S-scheme heterostructure exhibited the remarkable performance with an optimal H 2 producing rate up to 1298 μmol·h −1 g −1 , about 13.8 times than that of pristine ZIS. The mechanism and driving force of charge transfer and separation in S-scheme heterostructure photocatalysts were explained and discussed. This investigation will provide new insight into design and construction of S-scheme heterojunction photocatalysts for H 2 evolution.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
PubMed
高影响因子
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