ACS Applied Nano Materials
·
2021
·
IF 5.097
Jin Wang,Yi Wang,Dun Zhang,Chao Chen,Zhanxu Yang
Harvesting a remarkable antibacterial performance is a major point to choose enzymatic catalytic and photocatalytic coupling catalysts. Here, Co–Mo–S mixed metal sulfides (MMSs) were composed by tailoring the composition and energy of metal organic framework (MOF)-based precursors. When n(Co)/n(Mo) = 1:1, Co/Mo-MOF is in the lowest energy state and the vulcanized CoS2/MoS2 nanosheets (NSs) exhibit the best enzymatic property. With the inherent photocatalytic activity, CoS2/MoS2 NSs can degrade more than 90% of methylene blue, methyl orange, rhodamine B, and tetracycline hydrochloride within 1 h. Promoted by intrinsic photocatalytic properties, CoS2/MoS2 NSs exhibit outstanding mimic enzyme-mimicking abilities in a neutral medium, which solve the big problem that nanozymes can only work in acidic environments. Due to the collaboration of enzymatic and photocatalytic catalysis, ·O2– can be generated in a neutral, no H2O2, and dark system, which can effectively kill Escherichia coli and Staphylococcus aureus. In all, the design of MOFs with adjustable compositions, the breakthrough of enzymatic catalysis working in a neutral medium, and the innovation of sterilization independent of external conditions encourage the utilization in an open environment and the construction of multifunctional materials in biotechnology, biosensors, and biomedicine.
研究领域:
材料科学
·
生物医学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Yan-Bo Cao,Yan-Peng Ye,Wei-wei Dong,Zhi-biao Li,Yi Ding,Wei-li Kong,Xi Wang
Hydrogen, a new energy source that emits no carbon and has a high energy content, has recently attracted significant attention. The CoS 2 /MoS 2 catalyst was produced using a one-step hydrothermal synthesis process. With a current density of 10 mA cm −2 , the CoS 2 /MoS 2 catalyst shows an overpotential of 116.8 mV for the HER under the 300 W Xe lamp's solar simulation, a 23 % improvement over the dark condition. Both the properly prohibited bandwidths of CoS 2 and MoS 2 , which promote the creation of photogenerated carriers and the existence of a p-n junction between them, are responsible for improving the photo-enhanced HER performance. The photoinduced electro-hole pairs' separation is improved by this p-n junction, reducing their likelihood of recombination and thereby enhancing the electrocatalytic ability of the system. This work demonstrates the possibility of photoelectric synergistic enhancement of the electrocatalytic performance of transition metal sulfides.
研究领域:
材料科学
·
催化化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Junfei Liu,Hai Lin,Yinhai He,Yingbo Dong,Ehma Rose Gueret Yadiberet Menzembere
Due to the mass production and the use of antibiotic drugs, the pollution of antibiotics in the environment is aggravated. Molybdenum sulfide (MoS 2 ), a kind of photocatalyst , can effectively degrade organics from the water environment. However, agglomeration and low catalytic activity sites are crucial to impeding the photocatalytic efficiency of MoS 2 nanoparticles . The aim of this study is to develop a MoS 2 composite with a higher hydrophily and excellent photocatalytic. In this study, a series of CoS 2 /MoS 2 @Zeolite photocatalysts (CoS 2 /MoS 2 @Z) with high hydrophily, adsorption capacity and photocatalytic were successfully synthesized by the combination of ultrasonic and facile hydrothermal method to solve these problems. The structure characteristics, photocatalytic efficiency, and photocatalytic degradation mechanism were systematically investigated. It was found that zeolite significantly improved the tetracycline (TC) adsorption by CoS 2 /MoS 2 @Z-50, which was conducive to the contact between TC and photocatalyst, and could further improve photocatalytic efficiency. The photocatalytic experiment results showed that CoS 2 /MoS 2 @Z-50 had the best removal effect on TC (96.71%) compared with other samples. The increase of photocatalytic activity was mainly attributed to the high active sites, separation and transfer of electrons and holes in heterojunction . Besides, the CoS 2 /MoS 2 @Z-50 maintained a good stability after five cycles of TC photodegradation . A possible photocatalytic mechanism of CoS 2 /MoS 2 @Z-50 was proposed. Synthesis of zeolite-based CoS 2 /MoS 2 heterojunction photocatalyst paves the way for TC photodegradation, which may become an efficient, environmentally friendly and a promising photocatalyst in the field of pharmaceutical wastewater treatment .
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
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Linshuang Liu,Haipeng Song,Shiqi Zhao,Huan Zhang,Peng Chen,Jingjing Wu,Feifei Jia,Shaoxian Song
Based on the strong activation activity and affinity of Co and MoS 2 for peroxymonosulfate (PMS), respectively, in this study, a CoS 2 /MoS 2 @chitosan (CoS 2 /MoS 2 @CS) gel with favorable photo responsive behavior was synthetically synthesized for more potent degradation of tetracycline (TC). It was found that CoS 2 /MoS 2 @CS had excellent catalytic active for the degradation of TC under visible light irradiation. The presence of CoS 2 /MoS 2 interfacial structure improve the electron transfer ability of the MoS 2 interface, and the degradation rate of TC was increased from 0.0106 min −1 to 0.0463 min −1 , with a high degradation rate of 97.4 %. CoS 2 /MoS 2 can effectively degrade TC within 5 cycles, demonstrating superior cycling stability. In addition, the system degraded different organic pollutants (tetracycline (TC), tetracycline hydrochloride (TCH), crystal violet (CV), and methylene blue (MB)) with a degradation rate higher than 96 %, which supports the ability of the CoS 2 /MoS 2 @CS-PMS system to degrade various chemical contaminants. Quenching analysis indicates that SO 4 •− is the primary reactive chemical free radical for the degradation of TC in the CoS 2 /MoS 2 @CS-PMS system. It provides an approach of combining the synergistic action of Co (II) and photogenerated carriers for more efficient activation of PMS that some inspirations of heterojunction catalysts for AOP applications.
研究领域:
环境科学
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Feng Huang,Rongde Meng,Yanwei Sui,Fuxiang Wei,Jiqiu Qi,Qingkun Meng,Yezeng He
A MoS 2 -coated CoS 2 composite has been prepared successfully via a one-step hydrothermal method . This CoS 2 @MoS 2 hybrid material has a distinct morphology with few-layer MoS 2 wrapping the CoS 2 nanoparticles . Serving as a supercapacitor electrode, the obtained CoS 2 @MoS 2 hybrid material exhibits a remarkable specific capacitance of 1038 F/g, a high rate capability of 71.7%, and excellent cycling stability of 84.76% retention after 10000 cycles. The superior electrochemical properties of the CoS 2 @MoS 2 nanocomposite are attributed to the synergistic effects between the layered MoS 2 and conductive CoS 2 .
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Huanchi Chen,Yuxuan Zhang,Gang Zhao,Bingzhe Jia,Xinming Wu
Transition metal sulfides exhibit excellent energy density and specific capacitance in redox enhanced supercapacitors. However, the phenomenon of rapid self-discharge limits their large-scale development. In this study, we have analyzed an innovative and simple preparation of polydopamine (PDA) coated CoS 2 @MoS 2 @CC for redox enhanced supercapacitors applications. Considering the suppression the self-discharge of supercapacitors while also improving electrochemical performance of electrode. Subsequently, the densities of states, differential charges and adsorption energies of the PDA@CoS 2 @MoS 2 @CC and CoS 2 @MoS 2 @CC electrodes were calculated by using density functional theory (DFT) to investigate the mechanism of the effect of polydopamine on the performance of supercapacitors. PDA@CoS 2 @MoS 2 @CC electrode reveals a large specific capacitance (3520.45 mF cm −2 ) and outstanding cycling stability (92.75 % capacity maintenance after 10,000 cycles at 1 mA cm −2 ). This is because of the strong interaction between the PDA coating and K + , while K + are adsorbed in the PDA@CoS 2 @MoS 2 @CC electrode with high adsorption energy (-2.59 eV). It is convenient for the storage of K + . Therefore supercapacitors assembled with PDA@CoS 2 @MoS 2 @CC electrode also exhibit excellent performance (specific capacitance, energy density and power density are 511.85 mF cm −2 , 0.74 Wh cm −2 and 1.53 W cm −2 at 0.5 mA cm −2 ). It is important to investigate the self-discharge performance of the supercapacitor constructed by PDA@CoS 2 @MoS 2 @CC. Notably, the voltage of this device decreases to 0.73 V after 20000 s (initial potential is 1.7 V), which is better than the device assembled by CoS 2 @MoS 2 @CC (0.6 V after 20000 s). Further, the leakage current of this device is also less than the device assembled by CoS 2 @MoS 2 @CC at 1.7 V (0.05 mA vs 0.08 mA). This effective self-discharge suppression strategy is due to the free radical/singlet oxygen scavenging properties of PDA, which limits the parasitic Faraday reaction induced by diffusion-controlled, thus mitigating self-discharge.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Na Yang,Xu Guo,Jing Yu,Hongsen Zhang,Rumin Li,Lele Wang,Qi Liu,Jun Wang
The effective removal of radioactive Sr 2+ and Cs + ions from wastewater is crucial for environmental remediation. Herein, a novel solar-enhanced adsorption platform based on a CoS 2 /MoS 2 /P-MXene/C composite aerogel has been developed that can efficiently remove Sr 2+ and Cs + ions. The constructed CoS 2 /MoS 2 heterointerface provides abundant active regions, while the hierarchical porous structure of the aerogel promotes the rapid transfer of ions and water molecules. In particular, the superior photothermal conversion ability of the CoS 2 /MoS 2 /P-MXene/C makes it capable of capturing solar energy for local heating effect, thereby increasing ion diffusion and accelerating mass transfer. This photothermal feature can greatly enhance the adsorption kinetics through the evaporation of the solution and the ion concentration at adsorption sites. The equilibrium of both Sr 2+ and Cs + was reached within 1 h under one-sun illumination. The measured maximum adsorption capacities were 98.7 and 150.6 mg/g for Sr 2+ and Cs + ions, respectively. In addition, it has excellent selectivity and recyclability as well as high performance in high-salinity solution. The CoS 2 /MoS 2 /P-MXene/C also shows promising potential in the fields of solar-driven seawater desalination and purification of wastewater containing dyes due to the multi-functionality. This work not only engineers an efficient adsorbent for treating nuclear wastewater, but also presents a generic design strategy for multifunctional adsorption system enhanced by external fields for environmental applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2023
·
IF 2.7
Jialin Ma,Hengdong Ren,Ximing Zhang,Zhenying Liu,Sheng Wang,Wei Lian,Chang Li,Yin Liu,Ling Bing Kong
Two-dimensional materials formed through self-assembly of transition metal sulfides (TMDs) have shown potential applications for microwave absorption. In this paper, a new and simple strategy was demonstrated to prepare CoS 2 -MoS 2 sulfides binary composites, with a heterogeneous nanoflower structure, by using a self-assembly hydrothermal reaction process. PVP is used as a surfactant to modulate the interface between CoS 2 and MoS 2 , thus enhancing interfacial polarization and creating a unique multilayer rose-like structure. Microwave absorption performance of the samples was calculated according the electromagnetic parameters measured by using the coaxial method. The samples treated under optimized conditions exhibited a reflection loss of −71.56 dB at a thickness of 3.62 mm with an effective absorption bandwidth of 2.56 GHz.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Qingbo Wei,Zhangwen Ye,Xianpei Ren,Xue Li,Mingli Yin,Lingxing Zan,Feng Fu
Structure and morphology play a crucial role in improving the performance of catalysts. In this work, we prepared core-shell structured CoS 2 @MoS 2 nanoparticles by a two-step hydrothermal method . The unique electrochemical properties of the core-shell CoS 2 @MoS 2 nanoparticles with a narrow size distribution centered at 20–30 nm were demonstrated. An excitation-dependent photoluminescence emission was observed for the core-shell CoS 2 @MoS 2 nanoparticles. These core-shell CoS 2 @MoS 2 nanoparticles showed an excellent catalytic activity towards hydrogen evolution reaction (HER), indicated by the onset potential of 190 mV ( vs. RHE), the overpotential of 276 mV at a current density of 10 mA cm −2 and the Tafel slope of 60 mV·dec −1 . Therefore, the developed core-shell CoS 2 @MoS 2 nanoparticles can be applied for HER for their excellent catalytic activities.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Optoelectronics
·
2022
·Vol. 15
·期 1
·1-9
·
IF 0
Zhou Xingwei,Zhang Wei,Zhang Zunhao,Wang Zizhun,Zou Xu,Li Dabing,Zheng Weitao
The oriented two-dimensional porous nitrogen-doped carbon embedded with CoS 2 and MoS 2 nanosheets is a highly efficient bifunctional electrocatalyst. The hierarchical structure ensures fast mass transfer capacity in improving the electrocatalytic activity. And the greatly increased specific surface area is beneficial to expose more electrocatalytically active atoms. For oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) tests in 1 mol/L KOH solution, only 194 and 140 mV overpotential are required to achieve a current density of 10 mA/cm 2 , respectively. Our research provides an effective strategy for synergizing the individual components in nanostructures for a wide range of electrocatalytic reactions. Graphical Abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
Journal of Energy Storage
·
2023
·
IF 9.4
Qingmiao Zhang,Tianhao Yao,Qiangrui He,Heng Wang,Zhicheng Liu,Daquan Wang,Hongkang Wang,Lingjie Meng
Transition metal sulfides (TMSs) have been considered as up-and-coming anode materials for lithium-ion batteries (LIBs) owing to their large theoretical capacity and good reversibility . However, obvious volume variation and sluggish kinetics greatly limit their practical application. To address this issue, we successfully design and fabricate hollow CoS 2 /MoS 2 nanospheres and effectively enhance their lithium storage performance via N-doped carbon-coating (CoS 2 /MoS 2 @N-C). The unique hollow structure provides shortened ion-diffusion path, while the N-doped carbon shells buffer the severe volume changes during cycling and improve the electronic conductivity of the electrode. When used as an anode material for LIBs, the CoS 2 /MoS 2 @N-C displays high specific capacity (1056.9 mA h g −1 at 100 mA g −1 ), excellent cycling stability (653.9 mA h g −1 after 250 cycles at 1000 mA g −1 ), and rate capability (685 mA h g −1 at 2000 mA g −1 ). The CoS 2 /MoS 2 @N-C||LiFePO 4 full-cell LIB is also assembled and exhibits remarkable performance. The remarkable electrochemical performance of CoS 2 /MoS 2 @N-C electrode could be assigned to the synergistic enhancement effect of the N-doped carbon coating and hollow structure, which efficiently shorten the ion diffusion path , boost the charge transfer rate, and alleviated the volume changes of the electrode upon cycling.
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 ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Lianshan Sun,Chunyu Yue,Jianxun Zhao,Peng Chen,Heng Liu,Xinwei Wang,Wanqiang Liu
The three-dimensional mesh CoS 2 -MoS 2 -CNT composite material with abundant pores was prepared by two-step hydrothermal method as CoS 2 -MoS 2 -CNT functional separator and introduced into lithium-sulfur battery. XRD , XPS and SEM tests of CoS 2 -MoS 2 -CNT proved that the material was successfully prepared, and its morphology was a three-position porous structure composed of interwoven nanotubes and nanosheets . The results of Li 2 S 6 adsorption experiment and visual penetration experiment show that CoS 2 -MoS 2 -CNT composite material has strong adsorption effect on LiPS, and can prevent LiPS from passing through the separator, which effectively inhibits the shuttle effect. CoS 2 -MoS 2 -CNT coating effectively plays the synergistic effect of each component to achieve effective fixation and transformation of LiPS, which solves the shortage of lithium-sulfur batteries. Cells with CoS 2 -MoS 2 -CNT functional separators have a high initial specific capacity (0.2C, 1411 mAh g −1 ), excellent rate performance and excellent cycle stability at large currents (0.13% attenuation per cycle at 2C).
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）