ACS Omega
·
2023
·
IF 4.1
Chuangchuang Yang,Anpeng Hu,Qiaoling Dai,Qinghe Yang,Ranran Hou,Zhiwei Liu
Hydrodesulfurization (HDS) is an important process for the production of clean fuel oil, and the development of a new environmentally friendly, low-cost sulfided catalyst is key research in hydrogenation technology. Herein, commercial bulk MoS2 and NiCO3·2NiOH2·4H2O were first hydrothermally treated and then calcined in a H2 or N2 atmosphere to obtain Ni–MoS2 HDS catalysts with different structures. Mechanisms of hydrothermal treatment and calcination on Ni–MoS2 catalyst structures were investigated by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), electron paramagnetic resonance (EPR), and X-ray photoelectron spectroscopy (XPS). The catalytic performance of Ni–MoS2 catalysts was evaluated by the HDS reaction of dibenzothiophene (DBT) on a fixed bed reactor, and the structure–activity relationship between the structures of the Ni–MoS2 catalyst and the HDS of DBT was discussed. The results showed that the lateral size, the number of stacked layers, and the S/Mo atomic ratio of MoS2 in the catalyst decreased and then increased with the increase of the hydrothermal treatment temperature, reaching the minimum at the hydrothermal treatment temperature of 150 °C, i.e., the lateral size of MoS2 in the catalyst was 20–36 nm, the number of stacked layers of MoS2 was 5.4, and the S/Mo ratio in the catalyst was 1.80. In addition, the effects of different calcination temperatures and calcination atmospheres on the catalyst structures were investigated at the optimum hydrothermal treatment temperature. The Ni–Mo–S and NixSy ratios of the catalysts increased and then decreased with the increasing calcination temperature under a H2 atmosphere, reaching a maximum at a calcination temperature of 400 °C. Therefore, DBT exhibited the best HDS activity over the H-NiMo-150–400 catalyst, and the desulfurization rate of DBT reached 94.7% at a reaction temperature of 320 °C.
研究领域:
催化化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Jiahui Li,Yufen Wang,Qinyuan Yu,Xuedong Wei
A kind of MoS2@CoFe-MOF electrocatalyst was prepared on carbon cloth by a one-pot hydrothermal method. Excellent electrocatalytic activity of MoS2@CoFe-MOF is demonstrated, and the catalyst has overpotentials of 220 mV and 405 mV at 10 mA cm−2 and 50 mA cm−2, respectively. It is found that the MoS2@CoFe-MOF electrode exhibits excellent stability at the end of operation for 48 000 s, and it has the highest electrochemically active specific surface area and the lowest charge transfer resistance. This work proposes a promising approach in energy chemistry for hydrogen production by electrolysis of water using electrocatalysts composed of non precious transition metal sulfides and bimetallic MOFs.
研究领域:
材料科学
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电化学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Sulfur Chemistry
·
2024
·
IF 2.1
Yuyang Wang,Tao Ge,Xinju Zhan,Song Liu,Yulu Wei,Yueyue Qiao
The incomplete reduction of graphene oxide (GO) yields reduced graphene oxide (rGO), characterized by a zero band gap and intrinsic layer stacking, thus constraining its practical utility across diverse domains. Fortunately, this challenge can be effectively addressed by employing a suitable substrate for the fabrication of MoS2/rGO heterostructures. Nanocomposites of MoS2/reduced graphene oxide (MoS2/rGO-700W and MoS2/rGO-560W) were synthesized using MoS2 and GO solutions as starting materials through microwave-assisted synthesis with microwave power treatments of 700W and 560W, respectively. Structural characterization results reveal that the particle size of MoS2 within the composites is notably smaller compared to that of pure MoS2. The MoS2/rGO-700W composite demonstrates a more homogeneous dispersion of MoS2 and features a well-developed hierarchical porous structure with increased pore volume and specific surface area. The MoS2/rGO-700W composite demonstrates elevated ID/IG ratio, C/O ratio and C = C peak area, suggesting that increased microwave power enhances the removal of oxygen-containing groups from rGO. This process significantly restores the extended conjugated structure of graphene, thereby offering enhanced conductivity at the MoS2 interface. Furthermore, the proposed strategy holds considerable theoretical value and provides significant insights for the development process of novel MoS2-based composite electrode materials.
研究领域:
材料科学
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能源存储
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Siyuan Diao,Lili Meng,Lanlan Feng
The application of peroxymonosulfate (PMS)-based advanced oxidation processes , facilitated by the incorporation of metal-deposited MoS 2 catalyst, has attracted considerable interest in recent years within the scientific community. Nevertheless, investigating the structure-performance relationship between MoS 2 and deposited metal still presents a formidable challenge, yet a highly desirable pursuit. In this study, a Cu-MoS 2 single-atom catalyst (SAC) was successfully synthesized by a photo-deposition method, wherein Cu ions were deposited on the MoS 2 surface. The Cu-MoS 2 /PMS system exhibits exceptional degradation performance for tetracycline (TC), with a removal efficiency reaching 96% at 60 min. Furthermore, the density functional theory (DFT) is applied to investigate the coordination microenvironment of the catalyst by depositing of Cu. Experimental and theoretical calculations results exhibit that, on one hand, the introduction of Cu decreases the adsorption energy barrier and enhances the adsorption capacity of the catalyst for PMS. On the other hand, the abundant presence of Cu on the surface of the MoS 2 facilitates an accelerated transfer of electron , availing the formation of reactive oxygen species (ROS) via the distinct pathway: MoS 2 → transition metal → PMS. Concurrently, the synergistic interaction between Mo and Cu expedites rapid valence evolution of Mo 4+ /Mo 5+ /Mo 6+ and Cu + /Cu 2+ , thereby further enhancing the PMS activation. Hence, adjusting the coordination microenvironment of the catalyst represents a promising strategy for enhancing the catalytic activity.
研究领域:
环境科学
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催化材料
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理论化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
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IF 5.9
Weiqi Wang,Jiamu Cao,Rongji Zhang,Huaxin Xiu,Yufeng Zhang
Although SnO2 nanomaterials have been leading components of semiconductor gas sensors, their long-standing challenges of high working temperatures limit their practical application for ultralow-power-consumption room-temperature sensing. In this study, Au and Pt bimetallic nanoparticles were used to fabricate a MoS2/AuPt/SnO2 nanocomposite device by interfacially engineering a MoS2/SnO2 nanostructure. Owing to the unique structure and electrical properties, the as-fabricated MoS2/AuPt/SnO2 device exhibits a remarkable sensing response (2.22), short response time (20 s), and excellent baseline recovery (8 s) to 10 ppm NO2 gas at 23 ± 2 °C. Meanwhile, the MoS2/AuPt/SnO2 device possesses high sensitivity, a low detection limit (20 ppb), commendable reversibility, appreciable stability, and excellent selectivity against ammonia, carbon monoxide, ethanol, isopropanol, and acetone gases. The superior sensing characteristics of the MoS2/AuPt/SnO2 nanocomposite device are attributed to the modulation effect of the Schottky junction and p–n heterojunction on the potential barrier, highly efficient interfacial electron transport, and edge-enriched structure, which provide abundant active adsorption sites. This work will advance the evolution of room-temperature gas-sensitive nanomaterials and render them promising for applications in ultralow power-integrated sensors.
研究领域:
材料科学
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纳米技术
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Tian-Long Xi,Li-jun Liu,Qi Liu,Hong-Wei Wang,Lu-Yang Zuo,Hui-Tao Fan,Bo Li,Li-Ya Wang
Semiconductor materials have become the primary photocatalysts for photocatalytic hydrogen production. However, the design and synthesis of effective photocatalytic materials with excellent electron/hole separation efficiency, fast charge transfer, and low carrier recombination rate still face great challenge. Herein, hollow p-n heterojunction MoS 2 @ZnIn 2 S 4 nanoboxes are synthesized for the first time by growing n-type ZnIn 2 S 4 (ZIS) two-dimensional nanosheets on the surface of p-type hollow MoS 2 nanoboxes (MSNBs), which exhibits obvious photocatalytic activity. Among them, 5% MSNBs@ZIS photocatalyst shows the highest hydrogen production efficiency of 22.25 mmol h -1 g -1 , which is 7.3 times that of pure ZIS. The high photocatalytic hydrogen production efficiency of 5% MSNBs@ZIS can be attributed to the formation of hollow structure and p-n heterojunction, which can provide a large number of catalytic active sites, large surface area, and can effectively promote the separation of photogenerated carriers, respectively.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yunqi Ning,Shan Wang,Hanbing Wang,Wei Quan,Daqi Lv,Shansheng Yu,Xiaoying Hu,Hongwei Tian
The development of low-cost and efficient metal sulfide photocatalysts through morphological and structural design is vital to the advancement of the hydrogen economy. However, metal sulfide semiconductor photocatalysts still suffer from low carrier separation and poor solar-to-hydrogen conversion efficiencies. Herein, two-dimensional ZnIn 2 S 4 nanosheets were grown on Zn 0.5 Cd 0.5 S hollow nanocages to construct Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 hollow nanocages for the first time. Novel hollow core–shell Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 nanocages with Z-scheme heterojunction structures were obtained by incorporating MoS 2 nanosheet co-catalyst via the solvothermal method. The resulting Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 exhibited unique structural and compositional advantages, leading to remarkable photocatalytic hydrogen evolution rates of up to 8.5 mmol·h −1 ·g −1 without the use of any precious metal co-catalysts. This rate was 10.6-fold and 7.1-fold higher compared to pure ZnIn 2 S 4 and Zn 0.5 Cd 0.5 S, respectively. Moreover, the optimized Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 photocatalyst outperformed numerous reported ZnIn 2 S 4 -based photocatalysts and some ZnIn 2 S 4 -based photocatalysts based on precious metal co-catalysts. The exceptional photocatalytic performance of Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 can be attributed to the Z-scheme heterojunction of core–shell structure that enhanced charge carrier separation and transport, as well as the co-catalytic action of MoS 2 . Overall, the proposed Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 with heterojunction structure is a promising candidate for the preparation of efficient photocatalysts for solar-to-hydrogen energy conversion.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 47
·21947-21959
·
IF 5.8
Feng Jiao,Jun Tang,Jinzhao Huang,Zehui Liu,Jing Xiao
Molybdenum sulfide (MoS2) has attracted much attention as a potential catalyst for the oxygen evolution reaction (OER), but its unique low activity and low edge active centers limit its electrocatalytic activity. In this study, catalysts were prepared by growing NiSe nanoclusters in situ onto MoS2 substrates via electrodeposition; ultrathin MoS2 nanosheets and NiSe nanoclusters were cross-linked with each other to form a unique three-dimensional rosette structure; and MoS2@NiSe catalysts were successfully synthesised, which significantly improved bifunctional catalytic performance. The synthesised MoS2@NiSe catalysts exhibited good electrochemical performance: overpotentials required to satisfy the HER and OER processes at a current density of 10 mA cm−2 in 1 M KOH were 80 mV and 254 mV, respectively. When applied as a cathode and anode to assemble a bifunctional electrode system, the MoS2@NiSe||MoS2@NiSe electrolytic cell system required only 1.54 V to achieve 10 mA cm−2 in an alkaline electrolyte, which exceeded the value of most of the bifunctional catalysts reported in the literature to date. In addition, the catalyst maintained good surface structure and catalytic performance after a 24 h stability test. This study provides a new idea for the improvement and design of MoS2-based bifunctional catalysts and provides an important reference for research in the field of clean energy.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shuang Li,Tong Liu,Yao Yao,Mingzhao Yang,Feifei Li,Zebin Zhao,Shan Zhang,Gaohong He,Xiangcun Li
Solar powered interfacial water evaporation has become one of the most direct and sustainable technologies for seawater desalination. However, developing an efficient, stable evaporator with good salt resistance is a critical and challenging. In this work, MoS 2 -CNT@C membranes synthesized by loading 1T/2H MoS 2 flower spheres on the CNT@C hierarchically porous membrane by hydrothermal method are used as solar water evaporators. MoS 2 -CNT@C membranes, as photothermal conversion materials, have broadband solar absorption capacity and good hydrophilicity. The porous structure of CNT@C membrane can provide great water transport channels, and the decoration of flower spheres MoS 2 enhances the internal reflection which can increase the sunlight absorption capacity, resulting in a jump in water evaporation properties. The membrane has a high evaporation rate of 2.53 kg m −2 h −1 under one sun illumination. In addition, the evaporation rate of the sample in seawater reaches 2.51 kg m −2 h −1 , similar to that in the pure water, and remains stable after several evaporation cycles, ensuring that high quality fresh water can be produced during the desalination.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2020
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IF 5.578
Ping He,Xinyi Zhao,Fei Luo,Yi Zhang,Jie Wei,Tianhong Xu,Jiang Wu,Naichao Chen
At the front end of the Electrostatic precipitator (ESP), activated carbon injection is a common method to remove mercury from flue gas, but the high cost, low efficiency and non-recyclability limit the practical application of activated carbon. MoS 2 , a transition metal sulfide with a two-dimensional layered structure, was found to have favourable performances in removing contaminant. In this work, Fe 3 O 4 was successfully grown on the surface of flower-like MoS 2 by two-steps hydrothermal methods. The experimental results showed that the specific surface area of MoS 2 /Fe 3 O 4 (MF) was the largest when the ratio is 10 wt% (MF-10). Compared with pure MoS 2 , the specific surface area of MF-10 increased by 6.7467 m 2 /g, which was attributed to the growth of Fe 3 O 4 . At the same time, the introduction of Fe 3 O 4 made the MF possess superparamagnetism to facilitate its retrievability under an external magnetic field. In addition, MF-10 also showed a mercury removal efficiency of almost 100%. Although the efficiency of the MF-10 has decreased after 5 cycles and 24 h, it could still maintain about 90%, revealing a stable cycle life. Due to its mercury removal performance and recyclability, MF can be considered as a favorable adsorbent for removing elemental mercury.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
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IF 9.224
Ruixue Liu,Xinli Li,Zhendi Jia,Yiyun Wang,Yanli Peng,Congming Tang,Zhi Chen,Lin Dong
The hydrodeoxygenation of lactic acid (LA) to propionic acid (PA) is of great significance for the conversion of biomass to valuable products; however, it remains a great challenge because of the trade-off between LA conversion and PA selectivity. Here, we prepared ultrathin MoS2 nanosheets containing rich sulfur vacancies by lithium exfoliation. With the increase of the lithium exfoliation time, sulfur vacancy in MoS2 is accordingly increased and LA adsorption and activation on sulfur vacancy is enhanced. Increasing sulfur vacancy lowered the valence band simultaneously and enhanced the dissociation of the H2 molecule. Density functional theory (DFT) calculations showed that the sulfur vacancy efficiently adsorbed α-C–OH of the LA molecule, weakened the C–O bond, and achieved selective conversion of LA to PA. At 215 °C, 92.4% of LA conversion and 95.8% PA selectivity were achieved over the sulfur vacancy-rich MoS2 nanosheets, which broke the activity–selectivity trade-off on hydrodeoxygenation of LA, and notably surpassed those of previously reported catalysts. More importantly, the activity of the catalyst remained almost unchanged after 8 cycles of reaction.
研究领域:
催化化学
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生物质转化
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2016
·Vol. 4
·期 12
·2133-2141
·
IF 4.872
Shengping Wang,Longfei Tan,Ping Liang,Tianlong Liu,Jingzhuo Wang,Changhui Fu,Jie Yu,Jianping Dou,Hong Li,Xianwei Meng
Microwave (MW) hyperthermia has received great attention as an emerging green tumor thermotherapy. In this work, layered MoS2 nanoflowers were prepared through a simple bottom-up hydrothermal process. By coating MoS2 nanoflowers with bovine serum albumin (BSA-MoS2), BSA-MoS2 exhibits low biotoxicity and excellent microwave susceptive properties in vitro. Meanwhile, the heating effect improvement by the layered structure was confirmed via a computer-simulated experiment. Finally, layered BSA-MoS2 nanoflowers are designed as MW hyperthermia susceptible agents for in vivo cancer therapy with 100% tumor elimination via MW irradiation at 1.8 W, 450 MHz.
研究领域:
材料科学
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医学
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纳米生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）