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
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2022
·
IF 4.804
Jiakun Wu,Haikuo Wang,Zhicai Zhang,Chao Wang,Zhiqiang Hou,Shun Wan,Dazhuan Wu,Xiaoping Ouyang
WC-cBN-MoS 2 self-lubricating ceramics were synthesized by using high pressure and high temperature sintering method. An analytical model of the self-lubricating properties has been developed to reveal the interrelationship between mechanical and self-lubricating properties. The influence of mechanical and self-lubricating properties of ceramics on the wear rate were analyzed. Self-lubricating performance optimization criterion are proposed accordingly. It was found that MoC, WS 2 can be formed during sintering, which can ensure self-lubricating and low temperature sintering properties. Adhesive wear is the main wear mechanism, the extent of which varies with the content of self-lubricating components. The high modulus of elasticity is the main reason for the excellent self-lubricating and mechanical properties of composites. The well-sintered WC-cBN-MoS 2 bulks present an excellent self-lubricating property with a hardness of 26.3 GPa and fracture toughness of 10.5 MPa·m 1/2 , which is improved at least by 52% and 46% respectively compared with the traditional self-lubricating ceramics.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2022
·
IF 1.438
Kaiyue Liang,Mingcai Yin,Yixian Li,Yaoting Fan,Zhongjun Li
CdS and MoS 2 are both promising photocatalytic materials for hydrogen production and lots of MoS 2 /CdS composites have been investigated. However, most of the previous work focused on relatively stable hexagonal CdS; researches on cubic CdS are still rare mainly due to its unstability. Then in this paper, a ternary composite MoS 2 /CN/CdS composed of cubic CdS, MoS 2 and graphitic carbon nitride (g-C 3 N 4 , abbreviated as CN) was prepared by simple in situ precipitation of cubic CdS on MoS 2 /CN at room temperature. Based on a series of characterizations, the photocatalytic hydrogen production performance of MoS 2 /CN/CdS was studied. The results showed that when the amount of MoS 2 /CN was 10 wt.%, the activity reached 1253.2 μ mol h − 1 , about 110 times that of pure CdS. Especially, its stability was investigated in detail by cyclic hydrogen production tests, which indicated that although the activity decreased after the first cycle, it was stable in the following three cycles mainly due to the existence of CN. Namely, a relatively stable and high performance cubic CdS-based ternary composite was achieved. This research can provide some new insights into the design of cubic CdS-based photocatalysts.
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
Catalysts
·
2019
·Vol. 9
·期 4
·379
·
IF 3.444
Guannan He,Yimin Zhang,Qinyu He
High-rate recombination of photogenerated electron and hole pairs will lead to low photocatalytic activity. Constructing heterostructure is a way to address this problem and thus increase the photoelectrochemical performance of the photocatalysts. In this article, molybdenum sulfide (MoS2)/cadmium sulfide (CdS) nanocomposites were fabricated by a facile solvothermal method after sonication. The CdS nanoparticles immobilized on the MoS2sheet retained the original crystal structure and morphology. The composites exhibit higher photoelectrochemical properties compared with pure MoS2nanosheets or CdS powder. When the precursor concentration of CdS is 0.015 M, the MoS2/CdS composites yield the highest photocurrent, which is enhanced nearly five times compared with pure CdS or MoS2. The improved photoelectrochemical performance can be ascribed to the increase of light harvest, as well as to the heterostructure that decreases the recombination rate of the photogenerated electron and hole pairs.Keywords:MoS2nanosheets;CdS nanoparticle;heterostructure;photocatalysis;photoelectrochemical properties
研究领域:
材料科学
·
光化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2021
·
IF 5.458
Wanying Du,Xionghui Jia,Zhixuan Cheng,Wanjing Xu,Yanping Li,Lun Dai
Two-dimensional (2D) semi-conductive transition metal dichalcogenides (TMDCs) have shown advantages for logic application. Complementary metal-oxide-semiconductor (CMOS) inverter is an important component in integrated circuits in view of low power consumption. So far, the performance of the reported TMDCs-based CMOS inverters is not satisfactory. Besides, most of the inverters were made of mechanically exfoliated materials, which hinders their reproducible production and large-scale integration in practical application. In this study, we demonstrate a practical approach to fabricate CMOS inverter arrays using large-area p -MoTe 2 and n -MoS 2 , which are grown via chemical vapor deposition method. The current characteristics of the channel materials are balanced by atomic layer depositing Al 2 O 3 . Complete logic swing and clear dynamic switching behavior are observed in the inverters. Especially, ultra-low power consumption of ∼0.37 nW is achieved. Our work paves the way for the application of 2D TMDCs materials in large-scale low-power-consumption logic circuits.
研究领域:
电子工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Peican Wang,Lei Wan,Yuqun Lin,Baoguo Wang
Here we report a strategy to prepare electrocatalysts for hydrogen generation based on MoS 2 grown on highly conductive CoS 2 decorated carbon cloth (MoS 2 /CoS 2 /CC) through a two-step method. The rational design of sandwich structure of MoS 2 /CoS 2 /CC electrode was significant for homogenously dispersing MoS 2 on the carbon substrate, tuning the properties of the MoS 2 and improving long-term durability. Benefiting from the sandwich structure with highly exposed edges, fast electron transport and additional active sites brought by interfacial sulfur of Mo S Co, the resulting MoS 2 /CoS 2 /CC electrode exhibited superior HER activity and excellent stability in acid solution including an overpotential of 118 and 159 mV at current density of 10 and 100 mA/cm 2 , respectively, a Tafel slope of 37 mV per decade and excellent cycling stability in acid solution. The high catalytic performance and simplicity of the preparation method suggest applicability of the MoS 2 /CoS 2 /CC electrode for large-scale practical applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jiani Zhang,Xiaohui Guo,Jian Zhang,Xiaobing Guo,Yuying Xu,Lijuan Chen
Phoxim, extensively utilized in agriculture as an organothiophosphate insecticide, has the potential to cause neurotoxicity and pose human health hazards. In this study, an electrochemical enzyme biosensor based on Ti 3 C 2 MXene/MoS 2 @AuNPs/AChE was constructed for the sensitive detection of phoxim. The two-dimensional multilayer structure of Ti 3 C 2 MXene provides a robust framework for MoS 2 , leading to an expansion of the specific surface area and effectively preventing re-stacking of Ti 3 C 2 MXene. Additionally, the synergistic effect of self-reduced grown AuNPs with MoS 2 further improves the electrical conductivity of the composites, while the robust framework provides a favorable microenvironment for immobilization of enzyme molecules. Ti 3 C 2 MXene/MoS 2 @AuNPs electrochemical enzyme sensor showed a significant response to phoxim in the range of 1 × 10 −13 M to 1 × 10 −7 M with a detection limit of 5.29 × 10 −15 M. Moreover, the sensor demonstrated excellent repeatability, reproducibility, and stability, thereby showing its promising potential for real sample detection.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Zijun Zhong,Ruopeng Xu,Huijuan He,Qiuna Zhuang,Langhuan Huang
ABSTRACT A novel g-C 3 N 4 /MoS 2 heterojunction photocatalyst with high efficient visible-light-region was fabricated by a facile calcination method. The composite with various weight ratios of g-C 3 N 4 and MoS 2 was synthesized and characterized. The results showed that MoS 2 was uniformly distributed on the surface of g-C 3 N 4 , resulting in the formation of heterostructure. The photocatalyst showed excellent photocatalytic activity in the photodegradation of organic pollutants. The optimized g-C 3 N 4 /MoS 2 sample (10-CNM) exhibited 94% (Methylene Blue) degradation efficiency after being irradiated for 2 h under visible light. At last, the possible mechanism of the enhanced photocatalytic activity was discussed.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 36
·23503-23512
·
IF 4.036
Kun Huang,Lan Yang,Yihong Gao,Shikuo Li,Hui Zhang,Fangzhi Huang
For electrocatalytic hydrogen evolution in acidic environments, the stability of catalysts has always been a significant factor restricting development. Here, we prepared a superstable SnO2/MoS2 coupled nanosheet array on carbon cloth (CC@SnO2/MoS2), exhibiting an overpotential of 166 mV at a current density of 10 mA cm−2. According to the results of various tests and theoretical calculations, it is shown that the establishment of SnO2/MoS2 interface engineering is to accelerate the electron transmission on the heterogeneous interface and S defects on the edge of MoS2, and finally improve the conductivity and catalytic activity of the catalyst. More importantly, the formation of an SnO2 interface layer during in situ transformation improves the stability and hydrophilicity of the material surface. We have proposed a strategy for engineering an interface with fast electron transport and proton adsorption, providing some new ideas for the design of HER catalysts in acid electrolytes.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
DOI
PubMed
高影响因子
Molecular Catalysis
·
2021
·
IF 5.062
Jing Cao,An Li,Yicen Zhang,Linchao Mu,Xi Huang,Yankun Li,Tao Yang,Cen Zhang,Congshan Zhou
To prepare catalyst with high activity, high selectivity and good stability remains the biggest challenge in the hydrodeoxygenation (HDO) of phenols by adopting MoS 2 -based sulfides as catalysts. Herein, we report a simple hydrothermal method to synthesize highly-dispersed nano-MoS 2 with abundant defects and some curved slabs. All these advantages enable nano-MoS 2 to provide a large number of coordination unsaturated sites to anchor Co atoms. The unsupported Co-doped catalyst with an optimal Co/(Co + Mo) molar ratio of 0.3 exhibited excellent performance in the HDO of p -cresol with conversion of 98.7 % and toluene selectivity of 98.9 % at 220 °C. Moreover, the optimized Co/MoS 2 -0.3 catalyst had a good stability after reaction of 72 h. The excellent HDO performance was attributed to the formation of abundant Co-Mo-S active sites which optimize the electrical structure of nano-MoS 2 by Co promoter.
研究领域:
催化化学
·
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
FERROELECTRICS
·
2021
·
IF 0.62
Feng Wang,Fang-Yuan Lv,Kui-Long Liu,Zhi-Hao Li,Shu Niu,Yun-Yi Zhang,Hai-Lin Cong,You-Qing Shen,Bing Yu
A MoS2 nanosheets drug delivery system with photothermal conversion ability was synthesized. The drug loading content of the synthesized was as high as 24.5%. The drug HCPT was modified by lipoic acid (LA) and connected onto MoS2 nanosheets through S-Mo bond, which is more stable than physical adsorption. Due to the ester bond between HCPT and MoS2 nanosheets, the drug delivery system could responsively release HCPT when exposed to esterase.
研究领域:
材料科学与工程
·
生物医学工程
·
药剂学
✓ 已验证
产品关联
DOI
高影响因子
Inorganics
·
2025
·Vol. 13
·期 3
·88
·
IF 3
Jingjing Dai,Guofei Li,Yuanyuan Wang,Cancan Zhang,Hui Nan,Guijun Yang
During the process of producing potassium fertilizer from salt lake resources, a large amount of waste liquid brine, rich in raw materials such as magnesium chloride, is generated. In this work, a MoS2/MgAl-LDH composite material was constructed using the secondary hydrothermal technique. Characterizations including X-ray diffractometer (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) confirmed the distribution of MoS2nanosheets on the surface of MgAl-LDH. Under full-spectrum irradiation, the degradation efficiency of Rhodamine B reached 85.5%, which was 69.2% higher than that of MgAl-LDH alone. The results from the electrochemical, UV-Vis, and XPS-VB tests indicate that the internal electric field accelerated the separation and transportation of charge carriers between MoS2and MgAl-LDH. These findings demonstrate the great potential of MoS2/MgAl-LDH as a photocatalyst in the degradation of organic dyes, which will aid in the green recycling utilization of magnesium resources from salt lake by-products.
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
危险品化学品经营许可证（带存储）