CARBON
·
2022
·
IF 11.307
Keke Kang,Limin Wang,Yajie Ma,Kai Yu,Jingwei Liu,Fengyu Qu,Huiming Lin
Here, Co 9 S 8 / [email protected] ( [email protected] ) nanocomposites are synthesized by a two-step hydrothermal process. Firstly, sulfur-doped carbon dots (S-CDs) are prepared by using 3-mercaptopropionic acid as a precursor. A region with denser –SH group is regarded as nucleation site on S-CDs for the growth of Co 9 S 8 to induce heterostructure. As-synthesized [email protected] possess great harvest in NIR region and hyperthermia (51.5%, 1064 nm) for photothermal (PTT). Besides, hyperthermia can elevate the thermal energy of nanocomposite to assist low-energy NIR-II irradiation (1064 nm, 1.16 eV), realizing the excitation of Co 9 S 8 (1.46 eV) and reactive oxygen species (ROS) generation for photodynamic therapy (PDT). What's more, [email protected] exhibits GOx-like activity that could consume glucose to elevate H 2 O 2 level and inhibit intracellular energy supply. In addition, they also show mimic peroxidase (POD) and catalase (CAT) characterization, and the tandem multi-nanozye activities endue the enhanced chemotherapy (CDT) and PDT. [email protected] reveals the greater ROS generation and nanozyme activity compared with pure Co 9 S 8 @PEG, attributing to the efficient charge separation in heterostructure. The novel biodegradation of [email protected] makes the elimination via feces and urine within 2 weeks. That is associated with PTT/PDT/CDT/starvation therapy to activate immune response for anticancer.
研究领域:
材料科学
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纳米技术
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生物医学工程
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癌症治疗
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2020
·Vol. 7
·期 3
·753-763
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IF 7.683
Shi-Hua Chen,Xiang-Yu Xiao,Pei-Hua Li,Yi-Xiang Li,Meng Yang,Zheng Guo,Xing-Jiu Huang
The detection of chlorpyrifos is of great importance due to its massive usage and serious toxic effects on human health and the ecosystem. Although fruitful achievements have been made in the photoelectrochemical (PEC) sensing of chlorpyrifos, the construction of a label-free PEC interface with high sensitivity and selectivity still faces serious challenges. In this work, we design a direct Z-scheme ZnS/Co9S8 heterojunction with hollow cubic structures, and the PEC sensor based on such materials achieves the highly sensitive and selective detection of chlorpyrifos through the inhibition to the photoresponse of ZnS/Co9S8 by chlorpyrifos. For sensitivity, the hollow cubic structures of the heterojunction increase the light absorption, and the formation of a direct Z-scheme of the photocatalysts greatly improves the spatial separation of photogenerated charge carriers, thus achieving better PEC activity and higher photocurrent response of the heterojunction than those of individual materials. It shows a wide linear range from 0.05 ppb to 40 ppb with a detection limit as low as 0.0166 ppb (defined as S/N = 3). In particular, the specific interaction between ZnS/Co9S8 and N and S atoms of chlorpyrifos creates the high selectivity for chlorpyrifos. In addition, the PEC sensor is still stable after storage for two weeks.
研究领域:
环境科学
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分析化学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2021
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IF 4.291
Chang Feng,Zhuoyuan Chen,Jiangping Jing,Mengmeng Sun,Jing Han,Ke Fang,Weibing Li
Hierarchical structure can significantly increase the reactive sites and provide advantages for heterojunction engineering in the field of photocatalysis. However, it is still a great challenge to realize efficient photocatalytic hydrogen production by controlling the band structure and constructing Z-scheme heterojunction system based on the hierarchical photocatalyst. In this paper, a CdS/Co 9 S 8 Z-scheme heterojunction system was prepared by depositing CdS nanoparticles on nanoflower-structured Co 9 S 8 hierarchical photocatalyst, which showed enhanced photocatalytic hydrogen production performance. The photocatalytic hydrogen production rate of the CdS/Co 9 S 8 Z-scheme heterojunction system is 11.60 mmol g −1 h −1 , which is 13.6 and 55.2 times that of CdS and Co 9 S 8 , respectively. The synergistic effect of the hierarchical structure and the Z-scheme heterojunction makes the photogenerated charge carriers quickly and efficiently transfer to the surface of the photocatalyst, which accelerates the photocatalytic hydrogen production process.
研究领域:
材料科学
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光催化
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纳米技术
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能量转换
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2023
·
IF 11.5
Ziqing Yang,Xiaosi Qi,Chen Li,Qiqing Liang,Lei Wang,Junfei Ding,Yunpeng Qu,Xiu Gong,Wei Zhong
Interfacial polarization had a great impact on the attenuation of electromagnetic wave . To aggrandize interfacial polarization, a strategy of constructing the abundant interfaces was proposed and investigated. Herein, CoNi nanospheres , CoNi@SiO 2 nanospheres and core@shell CoNi 2 S 4 /Co 9 S 8 @SiO 2 @MoS 2 flower-like multicomponent nanocomposites (MCNCs) were elaborately designed and successfully fabricated through a simple continuous hydrothermal process, classical Stöber method and hydrothermal treatment . The obtained results demonstrated that the elaborately constructed abundant interfaces greatly boosted the polarization loss ability, which resulted in the enhanced interfacial polarization. Therefore, the as-prepared CoNi 2 S 4 /Co 9 S 8 @SiO 2 @MoS 2 flower-like MCNCs presented the superior electromagnetic wave absorption properties (EMWAPs) compared to the CoNi and CoNi@SiO 2 precursors. Furthermore, the EMWAPs of CoNi 2 S 4 /Co 9 S 8 @SiO 2 @MoS 2 flower-like MCNCs could also be further improved by optimizing the hydrothermal temperature and filler loading. The obtained CoNi 2 S 4 /Co 9 S 8 @SiO 2 @MoS 2 flower-like MCNCs presented the excellent comprehensive EMWAPs including strong absorption capability, broad absorption bandwidth and thin matching thickness, which could be attributed to the unique structure, excellent interfacial polarization and synergistic effect. Therefore, this finding not only demonstrated that introducing the abundant interfaces was an effective strategy to strengthen interfacial polarization for the promotion of EMWAPs, but also provided an alternative approach to exploit the novel high-efficiency microwave absorbers.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qingqing Pang,Kaihang Sun,Xizheng Fan,Kun Xiang,Baojun Li,Shufang Zhao,Young Dok Kim,Qiaoyun Liu,Zhongyi Liu,Zhikun Peng
The dynamic evolution of catalyst structures during the electrocatalytic reaction has seriously hindered our comprehensive understanding of catalytic processes and pathways. In this work, we report that the metal-sulfide (ReS 2 /Co 9 S 8 ) heterostructure has multiple synergistic effects, enhancing the furfural oxidation reaction (FOR) coupling with hydrogen evolution (HER). Under cathodic reduction conditions, H 2 production can be promoted at specific active sites by the original heterostructure of ReS 2 /Co 9 S 8 . Under anodic oxidation conditions, a new heterointerface of ReS 2 /Co 9 S 8 -Co(OH) 2 is in-situ reconstructed based on the original ReS 2 /Co 9 S 8 heterostructure. The new ReS 2 /Co 9 S 8 -Co(OH) 2 heterointerface induced by this ReS 2 /Co 9 S 8 heterostructure significantly enhances FOR performance in an indirect way at 1.33–1.53 V RHE , resulting in a 86.3 % faradaic efficiency (FE). The optimized composite of ReS 2 /Co 9 S 8 with different molar ratios in a two-electrode system exhibits superior performance toward HER||FOR, achieving a smaller cell voltage of 1.43 V to reach 10 mA cm −2 compared to ReS 2 ||Co 9 S 8 (1.69 V). This work verifies the reconstructed heterointerface of ReS 2 /Co 9 S 8 -Co(OH) 2 for FOR and identifies the distinct catalytic mechanisms for FOR and HER.
研究领域:
电化学
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催化
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材料科学
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能量转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yufang Chen,Xiaoyan Xiong,Jianhang Nie,Siyi Li,Zifan Zhu,Lijiu Cao,Tao Jin
Using Cobalt 2-methylimidazole (ZIF-67) as the precursor, Co 9 S 8 /In 2 S 3 was successfully synthesized. The characteristic structure of Co 9 S 8 /In 2 S 3 is Co Metal-Organic framework (Co-MOF). Co 9 S 8 /In 2 S 3 semiconductor material was prepared by the hydrothermal method , which presented a special multi-wrinkled flower-like morphology. The Co 9 S 8 /In 2 S 3 semiconductor material has selectivity and high sensitivity to triethylamine (Rair/Rgas=100.3, 20 ppm), ultra-low detection limit (100 ppb), and good linearity relation at working temperature of 300 °C. The products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The growth mechanism of these products was proposed. A possible mechanism to explain the high sensing properties of these morphologies was that the Co 9 S 8 /In 2 S 3 material had p-n heterojunction structure characteristics, coupled with its high porosity and specific surface area on the morphology helped to improve the sensitivity to triethylamine (TEA).
研究领域:
材料科学
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纳米技术
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化学传感器
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半导体材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shizong Wang,Jianlong Wang
Cobalt sulfides as persulfate activator have received increasing interest in the field of persulfate-based advanced oxidation process. In this study, Co 9 S 8 anchored in N, S, O heteroatoms co-doped carbon (CoSx@N-S-O-C) composite was prepared with different sulfur precursors (sulfur, thiourea, thiophene and benzyl disulfide), and used to activate peroxymonosulfate (PMS) for sulfamethoxazole (SMX) degradation. The effect of temperature, pH, inorganic ions, humic acids and water components on SMX degradation was investigated. The results showed that sulfur precursor could regulate the catalytic activity of the composite through changing the cobalt speciation and carbon structure. The catalytic activity was highest when the molar ratio of sulfur to cobalt was 5:1 (CoS x @N-S-O-C-5). Sulfate radicals (dominant) and hydroxyl radicals contributed to SMX degradation. The intermediate products during SMX degradation were identified, and the possible pathway of SMX degradation was proposed. Pyridinic N, Co-N, cobalt, S 2− , S 2 2− , C-S-C and C-SO x were active sites for PMS activation.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Xueying Wang,Yang Yang,Rui Wang,Ling Li,Xiaohui Zhao,Wenming Zhang
Herein, we fabricate N-doped porous Ni3S2–Co9S8/carbon aerogels (Ni3S2–Co9S8/NCAs) using carrageenan/NiCo-metal–organic framework (MOF) hydrogels as the precursor via the high-temperature carbonization route with excellent electrocatalytic properties for the oxygen evolution reaction (OER). The electrochemical measurements indicate that the Ni3S2–Co9S8/NCA as a quintessential electrocatalyst exhibits excellent OER performance, which has outperformed most transition metal sulfide (TMS) catalysts in alkaline environments, as attested with a lower overpotential of 337 mV at 10 mA cm–2 and a smaller Tafel slope of 77 mV dec–1. Meanwhile, a Zn–air battery based on Ni3S2–Co9S8/NCA + Pt/C achieves a large power density of up to 256 mW cm–2 (and 193 mW cm–2), small charge/discharge voltage gap, and good cycling stability, notably better than the conventional RuO2 + Pt/C-based Zn–air batteries. These excellent electrocatalytic properties are mainly attributed to the distinct hierarchical porous structure and interfacial synergy between the Ni3S2 and Co9S8 nanoparticle structure with rich defects, facilitating the mass transport and high graphitization degree beneficial for electron mobility. It is envisioned that the research provides a novel approach for the exploration of marine biomass as an electrocatalyst.
研究领域:
材料科学
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电化学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 3
·964-977
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IF 3.5
Zhu Q.,Wei S.,Wang C.,Yang X. B.,Zhou B.,Xie Z. X.,Duan Z. Q.,Hu Y. M.
Unique wool-ball shaped nanocrystalline CoS was synthesized using solvothermal method in which dopamine (DA) was added as carbon source to combine with the CoS. The DA in situ polymerized and coated on the CoS particle surfaces during the solvothermal process. N, S co-doped carbon-encapsulated CoS(Co 9 S 8 ) were achieved after a post carbonization. In the composites, CoS(Co 9 S 8 ) nanocrystals and carbon are tightly bound and embedded into the amorphous carbon layer to form a spherical core–shell structure. Hybrid counter electrodes (CEs) fabricated with the product have good conductivity, dispersion and stability due to the synergetic effect between carbon and nanocrystalline CoS(Co 9 S 8 ). Charge transfer through the CE/electrolyte interfaces is improved by dopamine-carbon combination. In the optimal case, PCE of 8.82% of the dye-sensitized solar cells (DSSCs) with the hybrid CEs was achieved, which is close to that of the cell with Pt (8.86%) CE, and is a 41.12% increase compared with that of CoS CE cell with the structure of photoanode/N719/electrolyte (I − /I 3 − )/CE. Moreover, stability of the cells with the composite CEs was greatly improved. The results demonstrate that the as-prepared composites are promising alternatives to Pt-CEs for high-performance DSSCs. The reported preparation method will guide further developments in highly efficient carbon-based catalysts for electrochemistry and energy related applications.
研究领域:
材料科学
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能源技术
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电化学
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纳米技术
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太阳能电池
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Runrun Cheng,Yan Wang,Xiaochuang Di,Zhao Lu,Ping Wang,Xinming Wu
At present, the problem of electromagnetic wave (EMW) pollution is critical, and the design of high-performance absorbers is of great significance. Based on the synergy between dielectric and magnetic losses, and between multicomponents in heterostructures, the development of light-weight absorbers with a strong absorption capability and multiple scattering is a promising strategy to achieve high-performance absorbers. In this work, CoFe-MOF precursors with a bouquet-like structure were prepared via the hydrothermal method, and Co 7 Fe 3 /C and Co 9 S 8 /Fe/CoS 2 /C composites were obtained through a carbonization and sulfuration treatment during the high-temperature pyrolysis process, respectively. The experimental and theoretical results show that the Co 9 S 8 /FeCoS 2 /C composite has a better EMW absorption performance, and its optimal reflection loss (RL) value is -53.9 dB at a low filler loading of 20 wt.%, which is due to the S doping that enhances the interface polarization relaxation process and improves the impedance matching characteristics. Moreover, the Co 9 S 8 /FeCoS 2 /C composite can be as candidates of high-efficiency absorbers in extreme application environments.
研究领域:
材料科学
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电磁学
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环境科学
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复合材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Caiyan Gao,Xuezhen Feng,Lian Yi,Xiaoyong Wu,Renji Zheng,Gaoke Zhang,Yubiao Li
Formaldehyde (FA), as an important chemical raw material, has been widely used in many fields. However, the discharge of a large amount of FA-containing wastewater poses a serious threat to the environment and human health. Recently, the in-situ hydrogen energy release technology of hydrogen-containing stable liquid has been extensively explored due to its safe storage. Exploring a robust method to achieve FA removal and synchronous in-situ hydrogen release from FA containing wastewater is of great significant for environmental protection and energy crisis alleviation. Here, we have innovatively introduced peroxymonosulfate (PMS) activation technology into FA removal and hydrogen production simultaneously. The composite of nitrogen doped carbon coating Co 9 S 8 nanotubes (Co 9 S 8 @N−C) is employed as a proof of concept for FA decomposition and simultaneously hydrogen production based on PMS activation system. As expected, the Co 9 S 8 @N−C/PMS system presents much superior hydrogen production efficiency and satisfactory FA removal rate towards FA wastewater than those of common catalysis, photocatalysis and Fenton reaction in the basic condition in a wide range of FA concentration. The hydrogen yield reaches a value as high as 471 μmol within 60 min, corresponding to a FA degradation rate of 30% with an initial FA concentration of 0.722 mol L −1 . Characterizations and density functional theory (DFT) calculations suggest that the free radical process dominated by superoxide radical (O 2 ⋅ − ) and nonradical process dominated by singlet oxygen ( 1 O 2 ), which are induced by Co 9 S 8 @N−C/PMS system, are responsible for highly efficient hydrogen production via FA degradation. These generated O 2 ⋅ − and 1 O 2 can extract ⋅ H from FA to form ⋅ OOH intermediate, which can further combine with the ⋅ H from water to produce hydrogen. This study provides an applicable technique for environmental purification and new energy development based on FA containing wastewater.
研究领域:
环境科学
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化学工程
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能源技术
·
水处理
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Guizhen Liu,Shanshan Zhang,Yutian Cai,Yongzhi Cheng,Yingli Zhu,Pingan Chen,Hui Luo,Xiangcheng Li,Fu Chen
Flexible manipulations of morphology and composition have been considered as an art to achieve excellent microwave absorption performance for absorbers derived from metal-organic frameworks (MOFs). In this work, a strategy combining ligand-exchange induced hollow engineering and high-temperature one-step sulfuration has been proposed to fabricate the Co 9 S 8 /Co@N, S dual-doped carbon-based absorbers with tailored solid, yolk-shelled and entirely hollow polyhedral morphologies. The progressive hollow engineering not only enables composition control in the sulfuration process, but also endows the proposed absorbers with superior microwave absorption capacity due to the enhanced conductivity loss and Maxwell-Wagner polarization as well as optimized impedance matching. The yolk-shelled Co 9 S 8 /Co@N, S dual-doped carbon-based composite achieves a broad effective absorption bandwidth of 5.13 GHz at 1.88 mm with 20 wt% loading and realizes a minimum microwave loss of − 51.78 dB @ 11.63 GHz with 2.37 mm. This work reveals that the joint strategy of ligand-exchange induced hollow engineering and gas-solid reactive thermal process is an effective path to construct high-efficient lightweight multi-interfacial microwave absorbers for addressing the electromagnetic pollutions.
研究领域:
材料科学
·
电磁学
✓ 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）