JOURNAL OF SOLID STATE CHEMISTRY
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2022
·
IF 3.656
Li-hu Qian,Wei-wei Dong,Min-da Xu,Yan-Bo Cao,Xuan Wu,Xiao-jie Song,Yi Ding,Xi Wang
Developing hybrid metal sulfide electrocatalyst with excellent hydrogen evolution reaction (HER) catalytic performance and stability is vital to its commercial applications. Herein, hybrid CuCo 2 S 4 @ MoS 2 catalysts were designed with CuCo 2 S 4 synthesized by using ZIF-67 as a template and externally decorated with MoS 2 . The hybrid catalysts (denoted as C@M-0.5, C@M − 1, C@M − 2) show improved catalytic activity than those of MoS 2 and CuCo 2 S 4 due to large surface area and the interface between nanoflower-like MoS 2 and three-dimensional interconnected lamellar stacked CuCo 2 S 4 , which boost charge transport capability and improve the HER kinetic process. The influences of different ratio of CuCo 2 S 4 to MoS 2 on the electrocatalytic activity are investigated in detail. Specifically, C@M − 1 exhibit the best HER performance with an overpotential of 143 mV@ 10 mA/cm 2 , a Tafel slope of 45.2 mV/dec and satisfactory long-time stability. This work rationally designs hybrid CuCo 2 S 4 @MoS 2 catalyst to preserve the merits of using the ZIF-67 as a template and make use of the synergistic coupling effects between CuCo 2 S 4 and MoS 2 , which can be extended to synthesize other catalysts in different energy conversion fields.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 19
·15754-15762
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IF 2.779
Zhang Ting,Chu Xueying,Jin Fangjun,Xu Mingze,Zhai Yingjiao,Li Jinhua
Sensors for rapid and reliable detection of biomolecules are crucial for clinical medical diagnoses. Here, a rapid, ultra-sensitive, magnetic-assisted biosensor based on resonance Raman scattering at MoS 2 @Fe 3 O 4 composite nanoflowers is presented. Raman shifts and X-ray photoelectron spectra indicated that the composite was formed via Fe–S covalent bonds. Convenient magnetic separations could be performed because of the superparamagnetic Fe 3 O 4 nanoparticles. MoS 2 E 1 2g and A 1g Raman peaks were used as probe signals for anti-interference immunoassays. The probe unit of the immunoassay also included goat anti-human IgG molecules that were used as the target analyte. Au substrates coupled with the goat anti-human IgG were used as capture units to form sandwich biosensors. Because of the magnetic enrichment, the detection limit was improved by three orders-of-magnitude and the detection time was reduced from 1.5 h to 1 min. Sandwich biosensors using MoS 2 @Fe 3 O 4 nanoflowers as Raman probes could be very promising sensors for proteins, antigens, and other immunogenic biopolymers, as well as for corpuscular viruses and cells.
研究领域:
生物医学工程
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Wenhan Jia,Hao Wu,Yunxin Zheng,Ziyi Liu,Gaotuo Cai,Jianfeng Wen,Guanghui Hu,Tao Tang,Xinyu Li,Li Jiang,Zhiyong Wang,Ming Li,Haifu Huang
Herein, we demonstrate the enhanced pseudocapacitive performance of a MoS2-based flexible supercapacitor by the co-doping strategy of cations and anions. The MoS2 nanosheet arrays on carbon cloth are directly doped with N and Co atoms through a simple hydrothermal process. The obtained cation and anion co-modified MoS2 (N-Co-MoS2) shows improved electron transport efficiency and enhanced active sites for MoS2. According to the first-principles calculations, N-Co-MoS2 has a unique band structure and high electrical conductivity. As expected, N-Co-MoS2 shows higher capacitive performance with 5072.5 mF cm–2 and a better cycle life (retaining 100% capacitance after 10,000 cycles) than pure MoS2. Furthermore, a solid-state flexible N-Co-MoS2 supercapacitor device is fabricated to demonstrate excellent mechanical stability with a specific capacitance of 3236 mF cm–2 and a stable cycle capacitance of 75.56% after 5000 cycles. In our work, we have provided a reference for preparing MoS2-based materials with good supercapacitive performance.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
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2016
·Vol. 49
·期 31
·315304
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IF 2.772
Xiaohui Ren,Xiang Qi,Yongzhen Shen,Si Xiao,Guanghua Xu,Zhen Zhang,Zongyu Huang,Jianxin Zhong
2D photocatalytic TiO2/MoS2 hybrid nanosheets (HNs) have been prepared via a facile hydrothermal process. X-ray diffraction patterns and Raman spectra are carried out and confirm a well crystalized anatase and 2H-MoS2 hybridization. Additional morphological and microstructural tests verify a distinct MoS2 framework, indicating the relatively stability of the MoS2 nanosheet platform with a high specific surface area. UV–vis spectra and electrochemical impedance spectra exhibit an enhanced light absorption ability and conductivity of TiO2/MoS2 compared to that of just TiO2. Photoelectrochemical (PEC) tests also demonstrate the photocurrent of 20 : 1 TiO2/MoS2 HNs is greatly improved compared to that of as-prepared TiO2. The saturation current density is about 33 µA cm−2 when the applied potential is 0.2 V, which is nearly twice that of pure TiO2 and four times as high as 5 : 1 TiO2/MoS2 HNs and 1 : 1 TiO2/MoS2 HNs. Besides that, the duration test exhibits no detectable distinction after processing 25 cycles. The improved photocatalytic activities are perhaps derived from the high conductivity and the increased active sites for the introduction of co-catalytic MoS2 nanosheets as well as the positive synergetic effect between the TiO2 and MoS2. This work demonstrates that the as-prepared TiO2/MoS2 HNs may have a great potential application in PEC hydrogen production.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Cijun Shuai,Gao Pan,Zheng Wang,Tiantian He,Xiong Shuai,Qi Zhong,Shuping Peng
MoS 2 has shown potential in enhancing biological scaffolds with sonodynamic therapy. However, its efficacy in generating reactive oxygen species (ROS) is constrained by electron-hole recombination, which results in insufficient ROS levels to penetrate bacterial biofilms. To address this limitation, we adopted a dual-strategy approach by utilizing MoS 2 @Cu 2 O nanozymes with Type-II heterojunctions and enzyme-like activity, thereby enabling dual-mode antibacterial effects via the integration of sonodynamic therapy (SDT) and chemodynamic therapy (CDT). Specifically, we integrated MoS 2 @Cu 2 O nanozymes into poly-L-lactic acid scaffolds via selective laser sintering. Under ultrasound excitation, the electron-hole separation in MoS 2 @Cu 2 O heterojunctions generated 1 O 2 and ● OH outside the bacteria. Both simulation and experiments revealed the carriers’ separation mechanism and transfer path. Meanwhile, the Cu ions released by the scaffolds generated ● OH and consumed glutathione through the Cu + /Cu 2+ cycle, disrupting the redox balance inside the bacteria. A reactive oxygen species storm was formed through the dual attack on the interior and exterior of bacteria, inducing bacterial apoptosis. The obtained inhibition rates of S.aureus and E.coli were 97 % and 96 %, respectively. These results indicate that the MoS 2 @Cu 2 O/PLLA scaffold is promising for dual-mode SDT/CDT efficient antibacterial treatment.
研究领域:
生物材料学
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医学工程
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微生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2019
·
IF 4.561
Qingmiao Wang,Lai Peng,Yuanyu Gong,Feifei Jia,Shaoxian Song,Yanmei Li
Because of the easy-separation, high specific surface areas and rich binding sites, magnetic MoS 2 with nanoscale architectures showed great potential in working as adsorbents for heavy metal ions . However, the general composites of nanoscale MoS 2 and Fe 3 O 4 suffered from the poor stability in acidic solution due to their entire exposures of Fe 3 O 4 to H + , which made it difficult to regenerate the used adsorbents by the general acid treatment. This work reported a facile approach to prepare Fe 3 O 4 @Polydopamine (PDA)-MoS 2 nanospheres via in-situ growth of MoS 2 on the PDA modified Fe 3 O 4 nanospheres. Fe 3 O 4 @PDA-MoS 2 nanospheres possessed a fast adsorption of 2.4076 g/mg·min (Initial concentration of Pb 2+ : 200 mg/L) and high adsorption capacity of 508.9 mg/g at 298 K to Pb 2+ . This was because the specific surface area of MoS 2 grown in-situ on Fe 3 O 4 @PDA was 7.6 times that of the pure MoS 2 , which significantly increased the binding sites of MoS 2 for heavy metal ions. In addition, the as-prepared nanocomposites exhibited not only easy-separation within 120 s by an external magnet, but also long-term stability in strong acid solutions as well as facile regeneration by general acid treatment. The tight PDA layers outside the Fe 3 O 4 nanospheres could work as not only a template for the formation of MoS 2 nanoflowers but also an efficient protective coating for the improvement of the stability of nanocomposites. The findings might open up the possibility of expanding the practical application of nanoadsorbent in environmental remediation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
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2019
·
IF 5.162
Tian-Tian Chen,Rui Wang,Lin-Ke Li,Zhong-Jun Li,Shuang-Quan Zang
Metal–organic framework (MOF) derived hybrid materials have been developed as an efficient non-noble-metal electrocatalysts for clean energy conversion systems. In this work, a Co-based MOF containing nitrogen and oxygen heteroatoms (Co-NOMOF) mixed with the thiomolybdate [Mo 3 S 13 ] 2− nanoclusters was used to prepare the N, S, O-doped carbon encapsulating Co 9 S 8 and MoS 2 (Co 9 S 8 /MoS 2 @NSOC) nanocomposite by one-step pyrolysis . The Co 9 S 8 /MoS 2 @NSOC nanocomposite exhibited remarkable catalytic performance for hydrogen evolution reaction (HER) with overpotential of 194 and 233 mV in 1 M KOH and 0.5 M H 2 SO 4 solution under 10 mA cm −2 , respectively, which was ascribed to the multiheteroatom-doped hierarchical porous carbon matrix and the synergistic effect of intrinsic activity of Co 9 S 8 and MoS 2 . This work provides new opportunity for developing highly efficient non-precious metal electrochemical catalysts.
研究领域:
材料科学
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能源化学
·
电催化领域
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Yanjun Zhang,Yu Yang,Satoshi Takizawa,Keisuke Kuroda,Zhiqian Jia,Peijuan Liu,Huangzhao Wei,Nigel J.D. Graham
The simultaneously efficient removal of radionuclides and heavy metals is an important and challenging topic for aquatic environmental protection. In this work, molybdenum disulfide (MoS 2 ) with heavy metal ion adsorption capacity and positively charged polyethyleneimine (PEI) were used to fabricate a novel layer-by-layer (LbL) self-assembly composite membrane by a simple alternating immersion method. The unique structure with positive charge ensures high removal for toxic metals (R Cs(I) = 99.83 %, R Sr(II) = 100 %, R Hg(II) = 99.2 %, R Pb(II) = 98.13 %, R As(III) = 98.5 %). The inherent low resistance channels in MoS 2 provided the optimized composite membrane an elevated water flux. Long-term experiments and membrane regeneration also demonstrated that the membrane possesses exceptional stability and reusability in removing low levels of radionuclides Cs(I) and Sr(II) from water. This study confirms the feasibility of the MoS 2 -PEI composite membrane for the treatment of contaminated waters containing radionuclides and heavy metals.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
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2024
·
IF 6.3
Weiwei Zhang,Su Xu,Yuanjin Zhao,Huan Chen,HuaYing Li,Han Liu
Sulfamethazine (SMT), a sulfonamide antibiotic, is widely present in medical wastewater and is one kind of refractory organic pollutants that endanger the water environment. An efficient and environmentally friendly degradation method is crucial for treating antibiotic wastewater. Based on the strong activation capability of transition metal ions for peroxymonosulfate (PMS) and highly affinity of MoS 2 towards PMS, the decoration of MoS 2 with transition metal ions would be an effective activation of PMS for degradation of organic pollutants. In this work, Co@MoS 2 was synthesized by hydrothermal method and used as catalyst for the degradation of SMT with PMS. Almost 100 % of sulfamethazine (SMT) was removed within 10 min. The EPR and quenching experimental results suggested that 1 O 2 was the main active species for SMT degradation in the Co@MoS 2 /PMS system. The accelerated valence cycle between Co 2+ and Co 3+ was the key factor to PMS activation and SMT degradation. Further, the Co@MoS 2 /PMS system showed good applicability to different pollutants, excellent reusability for SMT removal. Therefore, the results demonstrated that the present study process was a promising strategy for antibiotic removal.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2024
·
IF 3.5
Yaning Zhang,Shiyuan Fan,Siqi Gong,Huibin Liu,Huiting Xu,Junjie Qi,Honghai Wang,Chunli Li,Wenchao Peng,Jiapeng Liu
Capacitive deionization (CDI) has attracted significant attention as a water treatment technology owing to its low cost, high efficiency, and eco-friendliness. However, the unsatisfactory desalination performance of traditional electrode materials hinders the development of CDI. Herein, 1T-MoS 2 /C hybrid microspheres are successfully fabricated through confinement and phase engineering strategies. The confinement effect of porous hollow carbon microspheres reduces the overgrowth and agglomeration of MoS 2 nanosheets, which is beneficial for exposing more active sites and enhancing stability. Meanwhile, the 1T phase MoS 2 displays high intrinsic conductivity and large interlayer spacing, which is conducive to rapid insertion/extraction of Na + . Consequently, 1T-MoS 2 /C hybrid becomes a prospect electrode material for CDI, which showcases outstanding desalination capacity (48.1 mg/g at 1.2 V), eminent desalination rate as well as exceptional stability. Moreover, the desalination mechanisms are clarified through various characterizations and density functional theory calculations. This study provides new perspectives on designing high-performance MoS 2 -based CDI electrode materials.
研究领域:
材料科学
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环境科学
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水处理技术
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Yubiao Li,Yu Liu,Xueqian Wang,Yixing Ma,Ping Ning,Langlang Wang,Xiang Li,Rui Cao
Activated alumina-based composite oxide support is a commonly used support in hydrodesulfurization (HDS) catalysts, which not only retains the performance advantages of each component in the composite oxide support, but also significantly improves the defects of a single activated alumina support, such as the strong metal-support force of interaction. In this study, NiO-Al 2 O 3 composite support was prepared by introducing NiO-modified Al 2 O 3 , and MoS 2 /NiO-Al 2 O 3 catalysts were prepared for the hydrodesulfurization of COS by liquid phase reduction method. In the COS hydrogenation reaction, the MoS 2 /NiO-Al 2 O 3 catalyst achieved complete conversion of COS at 220 °C and showed more than 99.9% H 2 S selectivity. In stability tests, the catalyst maintained a COS conversion of over 99% throughout the 23-h hydrogenation reaction. Various characterization results show that the NiO-Al 2 O 3 composite support prepared by introducing NiO-modified Al 2 O 3 weakens the metal-support interaction force between MoS 2 and NiO-Al 2 O 3 composite support, which is conducive to the synthesis of MoS 2 with multilayer and long wafer structures. And it can significantly increase the formation rate of MoS 2 to 87.9%, which greatly improves the active site content of the catalyst. Furthermore, the dual modulation of MoS 2 and Al 2 O 3 by NiO modulated the surface alkalinity of the catalysts and promoted the formation of a large number of active edge sites in the MoS 2 /NiO-Al 2 O 3 catalysts, which in turn significantly improved the HDS performance of the catalysts. In addition, EPR characterization combined with experiments showed that the sulfur vacancies are the active sites for catalytic COS hydrodesulfurization over MoS 2 -based catalysts.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Wenhao Peng,Ningning Song,Zilong Su,Jiajun Wang,Kaixuan Chen,Shuji Li,Bingyan Wei,Shiping Luo,Aijuan Xie
A series of MoS 2 and Mn metal organic frameworks (Mn-MOF) were synthesized by hydrothermal method, and then MoS 2 , Mn-MOF and multi-walled carbon nanotubes (MWCNT) were mixed in different mass ratios and applied for supercapacitor. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge–discharge (GCD) are used to investigate the electrochemical performance of MoS 2 /Mn-MOF/MWCNT materials with different mass ratios. The experimental results show that when the mass ratio of m(MoS 2 ): m(Mn-MOF): m(MWCNT) is 1:4:1, the electrochemical performance of the MoS 2 /Mn-MOF/MWCNT composite is the best. The specific capacitance of optimal MoS 2 /Mn-MOF/MWCNT (1:4:1) reaches 862.73F g −1 , which is noticeable higher than that of MoS 2 (42.29F g −1 ), Mn-MOF (70.23F g −1 ) and MWCNT (347.27F g −1 ) materials. Moreover, the EIS test manifests that the MoS 2 /Mn-MOF/MWCNT (1:4:1) composite has a lower R ct value (2.566 Ω). Therefore, MoS 2 /Mn-MOF/MWCNT (1:4:1) has the best electrochemical performance among the all as-fabricated supercapacitor materials. This research provides an effective method for the development of Mn-based supercapacitor materials and improves the capacitance performance of MOFs materials.
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
危险品化学品经营许可证（带存储）