INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Yating Xie,Ligang Chen,Qiu Jin,Jimmy Yun,Xin Liang
Co–Mo–S based catalysts have promising applications in both hydrogen evolution reaction (HER) and hydrodesulfurization (HDS). Herein, MoS 2 –Co 3 S 4 hollow polyhedrons have been successfully synthesized by the vulcanization of Mo doped ZIF-67. MoS 2 –Co 3 S 4 hollow polyhedrons show the superior HER and HDS catalytic activities to pure MoS 2 , Co 3 S 4 and MoS 2 –Co 3 S 4 nanoparticles prepared by the traditional coprecipitation methods, owing to the both morphology effect and synergistic effect between Co 3 S 4 and MoS 2 . DFT calculation studied the activation energies needed by MoS 2 and Co–Mo–S for HER and HDS, respectively. The required activation energies for C–S bond fracture and H 2 generation on Co–Mo–S structure are both obviously lower than that of MoS 2 structure. Our work reported a new method to synthesize Co–Mo–S catalysts with large surface area and numerous active sites, and further experimentally and theoretically proved Co–Mo–S structure had better catalytic activities for both HER and HDS.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Tanxia Xiang,Dengjie Zhong,Yongxian Zhou,Yunlan Xu,Danli Tang,Wantao Li,Yuanfang Yang,Chunmiao Fan,Jisai Chen
In this study, the MnFe2O4@Co3S4 magnetic nanocomposite was prepared by a two-step hydrothermal method and used to catalyze the ozone oxidation degradation of methylene blue. It was characterized by XRD, EDS, SEM, FT-IR, and XPS. The results showed that the introduction of Co3S4 made MnFe2O4 grow uniformly on Co3S4 nanosheets, which effectively prevented the agglomeration of MnFe2O4. Moreover, MnFe2O4 provided active sites and Mn3+/Mn2+ and Fe3+/Fe2+ cycles for the ozone oxidation process. Not only did Co3S4 provide the active site (Co2+/Co3+) for the ozone oxidation process but also its derived S2–/S22– accelerated the electron transfer rate on the surface of the material, thus improving the efficiency of catalytic ozone oxidation degradation of methylene blue. When the molar ratio of MnFe2O4 to Co3S4 was 6:3 (MnFe2O4@Co3S4-3), the catalytic ozone degradation efficiency of methylene blue was the best, which reached 93.55% in 12 min. The reactive oxygen species in catalytic ozonation degradation of MB were 1O2, O2.–, and ·OH. The MnFe2O4@Co3S4 magnetic nanocomposite is an efficient and stable O3 activator, which maintains high catalytic activity and low metal ion leaching after five cycles, indicating that it has a good application prospect in catalyzing ozone oxidation to degrade organic pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Bingqian Wang,Junyi Ma,Shujun Xu,Wenping Fan,Bin Liu,Guangming Li,Guangda Li
In this paper, a hollow tubular Co 3 S 4 /NiS/FeS heterogeneous composite was prepared by an ordinary hydrothermal procedure. The inner Co 3 S 4 can act as the carrier of the outer NiS/FeS, and the outer NiS/FeS can effectively prevent the collapse of the inner Co 3 S 4 hollow structure, ensuring the durability of the structure and performance in the cyclic charge-discharge test. The strong electronic interaction between Co 3 S 4 and NiS/FeS significantly improves the catalytic activity. It shows a small 230 mV overpotential at 10 mA cm −2 , which is superior to commercial RuO 2 . The Zn-air battery assembled with Co 3 S 4 /NiS/FeS catalyst showed outstanding stability over 2700 cycles with a narrow voltage gap of 0.67 V at 3 mA cm −2 . Flexible battery also combined based on this catalyst can generally be discharged/charged at each bending angle and the gap remained almost continuous. Furthermore, Co 3 S 4 /NiS/FeS also displays hydrogen evolution reactions activity, displaying a lower overpotential of 233 mV at 10 mA cm −2 . In the overall water splitting, Co 3 S 4 /NiS/FeS is used as both anode and cathode electrocatalyst , which can reach 10 mA cm −2 at 1.52 V, and the performance remains steady for 50 h. In conclusion, Co 3 S 4 /NiS/FeS is a potential tri-functional catalyst for ZABs and overall water splitting.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhenyuan Ji,Guanxiang Tang,Jingchuang Zhang,Xinghang Chuan,Jiali Zhong,Zixin Lin,Peng Song,Keqiang Xu,Xiaoping Shen
Exploiting advanced anode and cathode materials with distinctive architectures and multi-component participation is of great significance to boosting the energy density of asymmetric supercapacitors. Herein, ultra-fine FeOOH nanoparticles are in situ grown on the hollow N, S co-doped carbon (HNSC) spheres using a facile solvothermal strategy and subsequent calcination process. Benefiting from the attractive hollow architecture and the synergistic effect between FeOOH and HNSC, the FeOOH/HNSC composite as anode for supercapacitors delivers an optimal capacity of 588.2 C g −1 (1 A g −1 ) and remains 88.3 % of its initial value after 10,000 cycles at 15 A g −1 in 6 M KOH. Furthermore, the HNSC-supported Co 3 S 4 nanoparticles are also prepared through a one-step solvothermal strategy. The obtained Co 3 S 4 /HNSC composite as cathode achieves a capacity of 420 C g −1 (1 A g −1 ) and maintains a high retention of 95.3 % after 10,000 cycles at 15 A g −1 . The constructed asymmetric supercapacitor using FeOOH/HNSC and Co 3 S 4 /HNSC as anode and cathode appears to possess a superior energy density of 82.3 Wh kg −1 at 821.6 W kg −1 with retention of 84.9 % after 10,000 cycles at 10 A g −1 . These attainments demonstrate that constructing multi-component electrode materials with unique structures is an effective method to optimize the electrochemical characteristics of asymmetric supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xu Shi,Peidong Hong,Hongqi Huang,Dandan Yang,Kaisheng Zhang,Junyong He,Yulian Li,Zijian Wu,Chao Xie,Jinhuai Liu,Lingtao Kong
Fenton-like catalysts have usually superior catalytic activities, however, some drawbacks of ion leaching and difficult-to-recovery limit their applications. In this work, a hierarchical porous Fe 3 O 4 /Co 3 S 4 catalyst was fabricated via a simple phase change reaction to overcome these shortcomings. The introduced iron cooperates with cobalt achieving high-efficiency activation of peroxymonosulfate (PMS) to eliminate Rhodamine B (RhB). The results showed that 0.05 g/L Fe 3 O 4 /Co 3 S 4 and 1 mM PMS could quickly remove 100% of 200 mg/L RhB within 20 min, and the removal rate of RhB remained above 82% after 5 cycles. Moreover, the as-prepared Fe 3 O 4 /Co 3 S 4 possessed a great magnetic separation capacity and good stability of low metal leaching dose. Radical quenching experiments and electron paramagnetic resonance (EPR) techniques proved that sulfate radicals (SO 4 •− ) were the dominant reactive oxygen species responding for RhB degradation. X-ray photoelectron spectroscopy (XPS) pointed out that the synergism of sulfur promoted the cycling of Co 3+ /Co 2+ and Fe 3+ /Fe 2+ , boosting the electron transfer between Fe 3 O 4 /Co 3 S 4 and PMS. Moreover, the degradation pathways of RhB were deduced by combining liquid chromatography-mass spectrometry (LC-MS) analysis and density functional theory (DFT) calculations. The toxicities of RhB and its intermediates were evaluated as well, which provided significant assistance in the exploration of their ecological risks.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yangchao Liu,Senqing Fan,Yu Chen,Jiaojiao Chen,Jiaxin Meng,Mingxia Yang,Chuang Li,Haijie Qing,Zeyi Xiao
A catalytic membrane nano reactor (CMNR) with two-dimensional channels has been fabricated by graphene oxide (GO) nanosheets with ZIF-67 derived Co 3 S 4 catalyst immobilized on. The characterization by X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectron Spectroscopy (XPS) indicates the successful fabrication of Co 3 S 4 @GO nanosheets. The uniformly dispersed Co 3 S 4 nanoparticles immobilized on GO nanosheets in the range of 3–5 nm and the thickness of the CMNR is in the range of 206–1091 nm can be determined by Transmission electron microscope (TEM) and Scanning electron microscope (SEM), respectively. The catalytic performance of this CMNR has been evaluated by 4-nitrothiophenol (4-NTP) reduction under the flow-through mode. The 4-NTP conversion of over 99% can be achieved under the condition of membrane flux of being 144.4 L·m −2 ·h −1 . The uniformly dispersed Co 3 S 4 with small size and the confined two-dimensional channels with nano scale for enhanced mass transfer can be contributed to the good catalytic performance of this CMNR. High 4-NTP conversion and nice stability can be achieved for a long time by this CMNR under the condition of humic acid mixed in the reactant solution, since the CMNR is resistant to the poisoning of catalysts by humic acid.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Houfeng Zhang,Bojing Sun,Junjie Wang,Qian Zhu,Dongfang Hou,Chen Li,Xiu-qing Qiao,Dong-sheng Li
Optimize the separation and transport mechanism of photogenerated carriers in heterojunction composites, and make full use of the active sites of each material are key factors to enhance photocatalytic activity. Herein, we successfully synthesize defective CdLa 2 S 4 @La(OH) 3 @Co 3 S 4 (CLS@LOH@CS) Z-scheme heterojunction photocatalysts through a facile solvothermal method, which show broad-spectrum absorption and excellent photocatalytic activity. La(OH) 3 nanosheets not only greatly increase the specific surface area of photocatalyst, but also can be coupled with CdLa 2 S 4 (CLS) and form Z-scheme heterojunction by converting irradiation light. In addition, Co 3 S 4 with photothermal properties is obtained by in-situ sulfurization method, which can release heat to improve the mobility of photogenerated carriers, and also be used as a cocatalyst for hydrogen production. Most importantly, the formation of Co 3 S 4 leads to a large number of sulfur vacancy defects in CLS, and thus improving the separation efficiency of photogenerated electrons and holes, and increasing the catalytic active sites. Consequently, the maximum hydrogen production rate of CLS@LOH@CS heterojunctions can reach 26.4 mmol g -1 h −1 , which is 293 times than pristine CLS (0.09 mmol g -1 h −1 ). This work will provide a new horizon for synthesizing high efficiency heterojunction photocatalysts through switching the separation and transport modes of photogenerated carrier.
研究领域:
材料科学
·
化学
·
光催化
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2023
·
IF 9.9
Jing Jiang,Ruiru Yang,Xian Lu,Lunhong Ai
Interfacial solar water evaporation (ISWE) technology provides a green, energy-saving and economical way to sustainably produce freshwater from various water sources for addressing the impending water shortage. However, the low evaporation rate , complex manufacturing process and harmful surface salt accumulation for ISWE are still challenging and considerably restricted the practical applications. Herein, we design and fabricate a robust ISWE based on the hierarchical Co 3 S 4 nanostructure as a photothermal absorber and three-dimensional (3D) nickel foam (NF) as a primary structure with macroporous networks. The as-fabricated Co 3 S 4 /NF not only introduces sufficient photothermal centers to convert solar energy into heat, but also provides abundant channels for water transportation and steam escape. The Co 3 S 4 /NF evaporator exhibits a high evaporation rate of 1.56 kg m −2 h −1 and a photothermal conversion efficiency up to 94.18 % under one-sun illumination. Moreover, such evaporator shows the long-term durability and good salt-resistant ability, which can sustainably produce freshwater from various water sources including seawater, saline water, lake water and other contaminated water . The photothermal Co 3 S 4 /NF evaporator would provide a promising platform for the production of drinkable water in a safe and sustainable manner.
研究领域:
材料科学
·
环境工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Shunzhe Zhang,Kaifeng Wang,Haochang Chen,Hezhou Liu,Lei Yang,Yujie Chen,Hua Li
Transition metal sulfides (TMSs) have become promising candidates as electrode materials in energy storage fields thanks to the high theoretical capacity. However, their application is hindered by depressed electrical conductivity and poor cycling performance. Herein, we proposed a ZIF-67 derived, nitrogen-doped, graphene-coated and carbon nanotubes-interlinked 3D Co 3 S 4 /C conductive network (N–Co 3 S 4 -GN/CNT) for high-performance supercapacitors . Through controlling the mass ratio of ZIF-67, melamine and g-C 3 N 4 , various microstructures with determined electrochemical performance could be achieved. The nanocomposites synthesized with the ingredient mass ratio of 2: 1: 1 (NCSC-211) were proven to have the most excellent comprehensive electrochemical properties . In the NCSC-211 nanostructure , multi-layer graphene function as conductive shells for improved cycling performance by alleviating pulverization caused by volume change, thick CNTs act as conductive bridges and agglomeration spacers that increase electron conductivity and provide more active sites for redox reaction and doped-nitrogen offer enhanced wettability to electrolyte and faster electron transfer . The NCSC-211 electrode displayed specific capacitance of 1158 F g −1 at 1 A g −1 , rate capability of 86% at 10 A g −1 and extraordinary cycling stability with 97.2% capacitive retention after 4000 cycles. Furthermore, the assembled asymmetric supercapacitor NCSC-211//activated carbon exhibited energy density of 43.73/37.69 Wh kg −1 at power density of 800/8000 W kg −1 and capacity retention of 95.3% after 5000 cycles at 5 A g −1 . The designing strategy of in-situ grown instead of additional added conductive phase that fully-covered and strongly-interlinked network nanostructure may pave the road towards TMSs in synthesizing energy storage materials by compensating their intrinsic drawbacks.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Gangsheng Zhang,Yi Wang,Meng Chen,Jixiang Xu,Lei Wang
In this work, a carbon-doped Co 3 S 4 /CoSO 4 /MnO catalyst (C@CoSOMn) was prepared in this work by using ZIF-67 as the template. The prepared catalyst was used to degrade levofloxacin (LEVO) by activating peroxymonosulfate (PMS). The optimized catalyst could degrade 97.73 % LEVO within 20 min with a rate constant of 0.294 min −1 . The combination of water-soluble CoSO 4 and Co 3 S 4 made more Co sites accessible to PMS for lasting decomposition to produce active species. Moreover, Mn species with low redox potential could promote the regeneration of Co 3+ and the activation of PMS. The doped carbon could facilitate the transfer of electron. Superoxide radicals (⋅O 2 − ), bulk and surface hydroxyl radicals (•OH), surface sulfate radicals (SO 4 •− ), and electron transfer process, especially the singlet oxygen ( 1 O 2 ) were involved in the LEVO degradation. This study sheds light on the synergism between the Co-based sulfide and the Mn oxide in the activation process of PMS, and might prompt the development of other ZIF-67-derived hybrid materials for environmental remediation.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2025
·Vol. 15
·期 6
·505
·
IF 2.4
Xinyuan Zhang,Meng Sun,Haibo Guo,Ming Su
Pursuing cost-effective non-precious metal electrocatalysts is a key challenge in the field of sustainable energy conversion. Transition metal dichalcogenides, known for their unique electronic structure, demonstrate superior electrocatalytic capabilities for the hydrogen evolution reaction (HER), yet their effectiveness is still lacking. In the present study, a CuS/Co3S4@MWCNT composite was fabricated via single-step hydrothermal synthesis for HER applications. This catalyst exploited the synergistic effects between CuS and Co3S4to increase edge site functionalities and metallic conductivity, thereby resulting in high catalytical activity within the material. Furthermore, the incorporation of multi-walled carbon nanotubes (MWCNTs) into the composite effectively enhanced electron transfer kinetics throughout the HER process. Notably, thiourea serves a dual function in this synthesis, acting both as a reducing agent and as a sulfur source for the formation of metal sulfides. When evaluated in a 1 M KOH alkaline electrolyte, the synthesized nanocomposite exhibited a minimal overpotential of 300 mV to reach a current density of 10 mA/cm2, and a Tafel slope of merely 76.2 mV/dec, indicative of its good HER catalytic activity. These findings underscore the composite’s potential for application in hydrogen production technologies.
研究领域:
材料科学
·
电化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2024
·
IF 4.6
Cheng Lu,Weiyu Fan,Xiaoyu Zhao,Kaixin Li,Lezheng Wang,Yutian He,Huanian Zhang,Nannan Xu,Guomei Wang,Wenfei Zhang,Caixun Bai,Shenggui Fu
In practical applications, high repetition frequency (HRF) lasers are widely used in the fields of material processing, laser communication and medical therapy. In this work, the passive harmonic mode-locked (HML) technique is used to realize a HRF fiber laser in GHz level, effectively overcoming the limitations of traditional fiber laser structures. In order to maximize the advantages of nanomaterials, we synthesized high-purity hollow MoS 2 -Co 3 S 4 heterojunction materials by hydrothermal method. Then, a “sandwich” structure saturable absorber (SA) was prepared by photodeposition, and its nonlinear optical properties were investigated. The results demonstrate that the modulation depth and saturation intensity of MoS 2 -Co 3 S 4 SA are 24 % and 4.53 MW/cm 2 , respectively. The fiber laser based on MoS 2 -Co 3 S 4 SA could realize the fundamental frequency mode-locked at 23.11 MHz with a pulse width of 0.99 ps. In addition, various high-order HML are realized with this laser system capable of stable operation for extended periods up to the highest repetition frequency of 1.109 GHz achieved thus far in this field. This research provides strong support to promote the development and commercialization of HRF fiber lasers.
研究领域:
材料科学
·
光学工程
✓ 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）