CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Huiqin Ma,Zhuxiang Mao,Wen Liu,Yahao Zhao,Peng Liu,Difu Zhan,Qian Fu,Yizhong Huang,Changcun Han
ZnIn2S4 (ZIS) is an N-type direct bandgap semiconductor material with a visible light response, which exhibits excellent photocatalytic water-splitting performance. To enhance ZIS-based photocatalysts, heterojunction construction and cocatalyst loading methods have been explored extensively. In this research, a Co9S8/ZnIn2S4 (CS/ZIS) heterojunction was successfully synthesized via a solvothermal method, and then Ni(OH)2 nanoparticles were successfully loaded on CS/ZIS by photodeposition, yielding the Ni(OH)2/CS/ZIS photocatalyst. Our findings reveal tight coupling of ZIS nanosheets with the CS surface, establishing an effectively constructed heterojunction structure that enhances interface charge transfer and light absorption. The synergistic effect of CS and Ni(OH)2 significantly boosts the photocatalytic hydrogen production of ZIS composites. The optimum hydrogen production rate of CS/ZIS is 10.06 mmol·h–1·g–1 and that of Ni(OH)2/CS/ZIS reaches 12.92 mmol·h–1·g–1, a 11.9-fold increase over pure ZIS, with exceptional light stability. Furthermore, we discuss the photocatalytic reaction mechanism based on the experimental and characterization results. This work presents a novel approach to designing highly efficient photocatalysts using ZnIn2S4, aimed at enhancing the conversion of solar energy into chemical energy.
研究领域:
材料科学
·
能源化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xiaoyan Xiong,Lijiu Cao,Siyi Li,Xuqi Hu,Guoqiang Liu,Yunpeng Gong,Yufang Chen,Tao Jin
In this study, a composite heterojunction material of Ti 3 C 2 Tx MXene nanosheets with Co 9 S 8 @In 2 S 3 nanoparticles , named (Co 9 S 8 @In 2 S 3 )/MXene, was constructed using a hydrothermal method . The materials were characterized and analyzed in terms of morphology, structure, and selective response properties to triethylamine gas. The materials were characterized by SEM, TEM, HAADF, STEM, XRD , XPS, BET, and other tests. The results showed a response value of 44.9 for (Co 9 S 8 @In 2 S 3 )/20% MXene at 350 °C and 20 ppm triethylamine (TEA), with a response/recovery time of 63 s/115 s respectively. In particular, (Co 9 S 8 @In 2 S 3 )/MXene exhibits excellent immunity to interference and a highly stable adsorption/desorption process with almost no noise interference. In addition, the (Co 9 S 8 @In 2 S 3 )/MXene material showed stable and fast selective response to TEA in different types of gas mixtures compared with the commonly used single TEA selective response study method. The results of this study provide valuable techniques and theories for the Environmental protection application of TEA selective response materials. Finally, this article performs a comparative analysis on the mechanism of selection response and stability of (Co 9 S 8 @In 2 S 3 )/MXene materials, and concludes that the process determining the specific response of (Co 9 S 8 @In 2 S 3 )/MXene materials to particular gas molecules includes three processes: shape-selective adsorption, redox reaction , and charge carrier conduction.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Chao Yue Zhang,Zhong Wei Lu,Yu Hai Wang,Zhe Dai,Hao Zhao,Geng Zhi Sun,Wei Lan,Xiao Jun Pan,Jin Yuan Zhou,Er Qing Xie
Many heterostructures containing two types of strong polar bonds were often designed to synergistically increase the chemical confining for soluble lithium polysulfide in lithium-sulfur batteries (LSBs). To make maximum use of the two chemical interactions on confining the polysulfides, a novel structure of 2D hexagonal WS 2 -rimmed Co 9 S 8 heterostructure nanoflakes was designed on the surface of carbon nanofiber (CNF) skeletons via a simple technique. The composite nanoflakes are ~50 nm in diameter and ~5 nm in thickness, and comprised of a ~40-nm Co 9 S 8 core and a 3–4 WS 2 edge. In this design, the Co 9 S 8 core and WS 2 edge can confine the polysulfides and catalyze the electrochemical progresses at the same time. Electrochemical tests indicated that the CNF@WS 2 @Co 9 S 8 -S cathodes show a high capacity (1175 mAh g −1 at 0.1 C), an excellent rate capability (keep 77.85% at 2.0 C), and a superior cycling stability (a low decay rate of 0.061% per cycle at 2.0 C, even lower at 7.0 C and 12.0 C).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
·
IF 3.5
Du Jinpeng,Lan Meng,Xiang Yulong,Dong Xiaoli,Zheng Nan,Wang Yu
Photocatalysis has been extensively applied in organic pollutant degradation, and the key focus is on developing efficient and sustainable photocatalysts nowadays. In this work, Co 9 S 8 /Cd 0.5 Zn 0.5 S (CS/CZS) heterojunction photocatalysts were prepared by the hydrothermal method, and their photocatalytic activity was evaluated by the degradation of rhodamine B (RhB) under visible-light irradiation. Compared with pristine Co 9 S 8 and Cd 0.5 Zn 0.5 S, CS/CZS heterojunction materials demonstrated better photocatalytic activity. The optimized CS/CZS-2 sample achieved 94% degradation efficiency of RhB under visible-light irradiation within 18 min. Active species trapping experiments revealed that ·O 2 − and h + were the main active substances in the photocatalytic degradation process of RhB. The excellent photocatalytic degradation performance can be attributed to the formation of type-II heterojunction between Co 9 S 8 and Cd 0.5 Zn 0.5 S with intimate contact interface, which is conducive to the separation and migration of photogenerated carriers. This study introduces a promising strategy for the design and development of type-II heterojunction photocatalysts specifically aimed at wastewater purification.
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
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 14
·2692-2701
·
IF 5.958
Shuangshuang Kai,Baojuan Xi,Haibo Li,Shenglin Xiong
Z-scheme photocatalytic systems, consisting of semiconductor/semiconductor heterostructures, mimic the natural photosynthesis and enhance the photocatalytic activity dramatically. Herein, we have for the first time synthesized unique all-solid-state Z-scheme ternary heterostructures by growing CdS nano-hemispheres radially assembled with nanorods as the core and CoS hexagonal nanoflakes as the shell on graphene sheets (CdS/Co9S8-RGO) through a facile one-pot hydrothermal method and subsequent annealing treatment. Furthermore, the growth mechanism is explored and analyzed by monitoring the intermediates in terms of structure and composition. The heterostructures form three paths available for charge carrier transfer and separation, wherein a redox-mediator-free Z-scheme constitutes CdS and Co9S8 and upgrades to an all-solid-state Z-scheme system by combination with RGO. Moreover, due to the excellent photon capture capability and electric conductivity, RGO also made great contribution to the effective separation and transfer of photogenerated carriers. Benefiting from efficient charge transfer and separation, CdS/Co9S8-RGO exhibits a H2 evolution rate up to 4.82 mmol h−1 g−1 and remarkable activity stability even after 20 h of photocatalytic reaction. We believe that the design philosophy via the plain synthesis merges multiple structural interfaces and transfer paths in a system reported here, shedding an insight into the design of other photocatalysts.
研究领域:
材料科学
·
能源化学
·
光催化
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yong Zhang,Lifa Zhang,Jingdu Bian,Mingcong Tang,Zijian Wang,Qingdong Chen,Dongzhi Zhang
In this paper, the Co/Zn-based zeolite imidazole framework (Co/Zn-ZIF) was synthesized by an etching method. Then, a certain amount of sulfur powder was doped into it and annealed to synthesize ZnS/Co9S8 composites with a core–shell structure mechanism (CS-ZnS/Co9S8). Compared with the single-metal ZIF, which is more studied at present, the application of a bimetallic ZIF shows remarkable excellent performance in gas sensing. The test results show that the sensor with a CS-ZnS/Co9S8 film has ultrahigh sensitivity to ammonia. At its optimal operating temperature of 240 °C, the detection limit of ammonia concentration can be detected to be 0.2 ppm. At the same time, the response of the CS-ZnS/Co9S8 thin-film sensor to 5 ppm concentration of ammonia is 4.56, which is 2.85 times and 3.26 times that of the single ZnS and Co9S8 thin-film sensors. In addition, the CS-ZnS/Co9S8 thin-film sensor has a response/recovery time of 7 s/9 s and has excellent repeatability, long-term stability, selectivity, and antihumidity interference. In addition to the polyhedral core–shell mechanism formed by ZnS/Co9S8, the p–n heterojunction directly formed by ZnS and Co9S8 is also a very important factor for the substantial improvement of its sensing performance.
研究领域:
材料科学
·
传感技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Wanqing Li,Yuhang Li,Hongquan Fu,Guangxing Yang,Qiao Zhang,Shengzhou Chen,Feng Peng
A novel phosphorus-doped Co 9 S 8 and carbon nanosphere composite (Co 9 S 8 /P@CS) was successfully prepared by adding a certain amount of sodium hypophosphite during the thermal treatment process of preparing Co 9 S 8 . The results of XRD and XPS confirmed the incorporation of phosphorus into the lattice of Co 9 S 8 . Electrochemical tests demonstrated that Co 9 S 8 /P@CS performs a high electrocatalytic activity for oxygen evolution reaction (OER). Under the current density of 10 mA cm −2 , Co 9 S 8 /P@CS-1:2 as the best catalyst has the lowest overpotential of 233 mV and Tafel slope of 48 mV dec –1 , which is far superior to the current noble-metal catalyst IrO 2 (414 mV, 96 mV dec –1 ). A rechargeable Zn-air battery was assembled with Co 9 S 8 /P@CS-1:2 as the air-electrode catalyst. Its maximum power density reached 142.50 mW cm −2 at 0.56 V and the current density was 255.47 mA cm −2 , significantly higher than those of the battery made by Pt/C-IrO 2 catalysts. Especially, after 350 h (1050 cycles) of charge and discharge, the performance of this assembled battery did not show a significant decrease, predicting a broad application prospect. In-situ Fourier transform infrared spectroscopy (FTIR) and density functional theory (DFT) calculations were used to analyze the active sites of catalyst and catalytic mechanism, revealing the relationships between structure and the catalytic performance for OER.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Hong Jia,Jie Wang,Wenwen Fu,Junhua Hu,Yu Liu
Metal-organic frameworks (MOFs) have been considered as the outstanding templates and precursors in synthesizing advanced cathode materials for supercapacitor. Herein, a novel hierarchical structure with hollow Co 9 S 8 polyhedrons welding on the top of MnCo 2 S 4 nanoneedles are rationally designed via a facile in-situ vulcanization approach. The unique morphology can provide more abundant reaction sites and ensure the efficient electron transport. Due to the synergistic effect between MnCo 2 S 4 and Co 9 S 8 , the hybrid electrode delivers a favorable specific capacity of 1100.5 F·g −1 at a current density of 1 A·g −1 in three-electrode system. Furthermore, an assembled asymmetric supercapacitor comprising MnCo 2 S 4 /Co 9 S 8 and activated carbon delivers a high energy density up to 45.8 W·h·kg −1 at a power density of 800 W·kg −1 . Moreover, the device holds more than 94.8% capacitance retention after 5000 cycles, demonstrating it could be a potential electroactive material for next-generation high performance energy storage device.
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
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Ziyu Zhang,Xiaoli Dong,Yu Wang,Nan Zheng,Hongchao Ma,Xiufang Zhang
Because of its superior coupling and composition matching, narrow band gap semiconductor heterojunction can increase redox activity, reduce carrier recombination, and enhance light absorption. When heterojunction photocatalysts are constructed properly, it is thought to be an efficient technique to boost photocatalytic activity. The Co 9 S 8 /CdS heterostructures in this study were created using a two-step solvothermal technique. The as-prepared Co 9 S 8 /CdS heterostructures exhibit outstanding photocatalytic degradation performance of methyl orange (MO) owing to their unique structure and compositional properties. Co 9 S 8 /CdS heterostructures can offer a remarkable MO degradation rate that can reach 97% in 25 min when illuminated by visible light. In addition to demonstrating better long-term stability after numerous cycling photocatalytic tests, experiments with radical trapping have shown that ·O 2 − is crucial for the photocatalytic degradation of MO. The pertinent photogenerated charge transfer and catalytic mechanisms of Co 9 S 8 /CdS heterostructures are suggested and examined.
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
Materials Today Communications
·
2024
·
IF 3.7
Shiyuan Xu,Youpeng Wang,Qiming Li,Jiawen Yan,Hao Huang,Caicai Zhang,Xiaoyu Zhang,Fuyi Jiang,Yanli Zhou
Herein, the high-capacity and amorphous MoS 3 has been employed to decorate the hollow Co 9 S 8 nano-spheres to fabricate the Co 9 S 8 /MoS 3 composites by a three-step synthesis. The chain-like and amorphous MoS 3 can provide a high capacity of 894 mAh g −1 and generate abundant active sites to boost the sodium storage properties of Co 9 S 8 based electrode. The heterogeneous interface between Co 9 S 8 and MoS 3 is conducive to the promotion of charge transfer and Na + diffusion kinetics. Thus, the Co 9 S 8 /MoS 3 as the novel anode materials exerts more outstanding sodium storage properties than pure Co 9 S 8 . At a given current density of 0.5 A g −1 , the Co 9 S 8 /MoS 3 delivers a desired reversible capacity of 621 mAh g −1 for 90 cycles. Even at 2 A g −1 , the Co 9 S 8 /MoS 3 exhibits a stable cyclic performance, the charge specific capacity is about 518 mAh g −1 for 500 cycles. At a high rate of 5 A g −1 , a high capacity of 486 mAh g −1 can be achieved, which is obviously higher than that of pure Co 9 S 8 . The remarkable sodium storage properties of Co 9 S 8 /MoS 3 are mainly resulted from the cooperate effects of amorphous MoS 3 and hollow Co 9 S 8 nano-spheres, which demonstrate the promising application of Co 9 S 8 /MoS 3 in future sodium storage devices.
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
Journal of Energy Storage
·
2024
·
IF 8.9
Ye Qu,Yanzi Zhang,Yali Zhang,Jun Song,Zhaoen Liu,Weixing Rao,Yu Liu
The multi-component synergy of electrode materials and structural engineering are crucial for high-performance supercapacitors. Herein, a novel sandwich-like MXene@NiCo-layered double hydroxides (LDHs)/Co 9 S 8 nanostructure is rational synthesized, which with rich pores can significantly facilitate the diffusion of electrolyte ions and boost high charge transfer capability. Besides, the interaction forces between components promote the integration of multidimensional materials, and the resulting hybrid structure significantly improves the electrochemical efficiency through synergistic effects. Remarkably, the obtained MXene@NiCo-LDH/Co 9 S 8 composites exhibit a high specific capacitance of 808.0 F g −1 at a low current density of 1 A g −1 , the value is nearly 1.4 times MXene@NiCo-LDH (586.2 F g −1 ), as well as good rate capability (512.0 F g −1 at 10 A g −1 ). Besides, the fabricated supercapacitor device (MXene@NiCo-LDH/Co 9 S 8 //activated carbon) showed an outstanding energy density of 96.4 Wh kg −1 at 800 W kg −1 ), and good cyclic performance of 70.26 % capacitance retention even over 9000 cycles. This research may provide a promising strategy for developing two-dimensional layered materials as an electrode material in energy storage applications.
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
Journal of Energy Chemistry
·
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
·
能源化学
·
电催化领域
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）