SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Lixiang Zhang,Luping Feng,Jiatian Jiang,Pan Li,Xi Chen,Sheng Zhang,Yuan Gao,Ruoxi Hong,Guofu Chen,Guojiang Mao,Hua Wang
A highly sensitive and visible-light-driven photoelectrochemical (PEC) sensor has been constructed for the quantitative assay of organophosphorus pesticides like chlorpyrifos (Chlo) using hollow Co 9 S 8 @CdS heterostructures . The Co 9 S 8 @CdS heterostructures were created by growing CdS onto Co 9 S 8 surface via one-step oil-bath route, of which Co 9 S 8 was fabricated with hollow tubular structures through the Co(CO 3 ) 0.35 Cl 0.2 (OH) 1.1 -templated solvothermal method . It was discovered that the so-obtained Co 9 S 8 @CdS with direct Z-scheme heterojunctions could exhibit larger photocurrents than the Co 9 S 8 or CdS because of the greatly enhanced separation efficiency of photo-generated carriers. What’s more, the photocurrent signal of Co 9 S 8 @CdS-based PEC sensor could be selectively inhibited with the addition of Chlo through the specific chelation between the N and S atoms of Chlo with C N and P S groups and Co sites of Co 9 S 8 @CdS so as to suppress the carriers transferring. The developed PEC sensor could exhibit a linear response for Chlo ranging from 0.050 to 1000 ppb, with the detection limit value down to 0.015 ppb, which was far below than those of currently reported PEC sensors. Besides, the proposed routes may provide guidelines for designing various direct Z-scheme heterojunction-based PEC analysis platforms for determining environmental pollutants like Chlo.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Shumin Liu,Jinxian Wang,Jianwei Wang,Feifei Zhang,Limin Wang
A Co 9 S 8 /GNS (graphene nanosheets) nanocomposites has been synthesized via a facile solvothermal approach followed by thermal treatment in nitrogen at 500 °C using graphite oxide sheets, CoCl 2 ·6H 2 O and thiourea as the starting materials. Highly uniform Co 9 S 8 nanoparticles with a size of about 80–90 nm are evenly grafted on the surface of GNS , forming a unique Co 9 S 8 /GNS hybrid nanostructure. When evaluated as anode materials for lithium ion batteries, impressive electrochemical performances of the as-prepared nanocomposites are achieved compared to that of pure bulk Co 9 S 8 , with an high reversible capacity of 1480 mAh g −1 . Moreover, the as-synthesized nanocomposites present excellent cycling durability and high-rate capability. The improvement in the electrochemical properties could be attributed to the well-designed structure of the Co 9 S 8 /GNS nanocomposite which possesses large number of accessible active sites for lithium-ion insertion, fast ion diffusion rate and good electronic conductivity.
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
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Yue Yan,Wenrui Wu,Yang Yang,Tao Xu,Xianfu Li
The rational collocation and construction of multiphase composite electrode materials with ingenious structures is a key strategic to enhance the electrochemical performance of supercapacitors (SCs). Within this project, a unique Co9S8@CoAl-LDH/NF core–shell heterostructure consisting of CoAl-LDH/NF ultrathin nanosheets sturdily attached to Co9S8/NF needle-like nanorods is grown in situ on self-supported conductive substrate nickel foam (NF) by an effortless and productive multistep hydrothermal method. The construction of the core–shell structure can effectively enhance the capacitive properties as well as the mechanical strength of the material. Compared with the single-component materials Co9S8/NF (1769.6 mF cm–2 and 91.6%) and CoAl-LDH/NF (858 mF cm–2 and 85.2%), the Co9S8@CoAl-LDH/NF composites have excellent capacitance properties (5052.4 mF cm–2) along with exceptional capacitance retention (5000 cycles) 98.5% even after undergoing charging and discharging. Furthermore, the asymmetric SCs fabricated with Co9S8@CoAl-LDH/NF and AC/NF exhibit an energy density of 0.17 mWh cm–2 at 3.20 mW cm–2. Therefore, the innovative core–shell heterostructure of Co9S8@CoAl-LDH/NF presented in this study holds immense practical potential as a groundbreaking electrode material in the realm of SCs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Shang Jiang,Miaomiao Mao,Mingjun Pang,Jie Song,Min Pang,Zhaoyang Song,Ruxia Zhang,Runwei Wang,Jianguo Zhao
Carbon-coating nitrogen all-doped Co 9 S 8 /Co 4 S 3 nanoparticles attached to reduced graphene oxide sheets (N-CS@C/G) was developed by an eco-friendly in situ methodology in this study. Glucose-derived carbon nano-wrapped layers and supported reduced graphene oxide were employed to develop a highly conductive network, whereas N dopants , Co 9 S 8 and Co 4 S 3 supplied additional electrochemical active sites for lithium-ion energy storage. The well-designed hetero-structured N-CS@C/G electrode with a specific surface area of 101.29 m 2 g −1 can contribute to notably improving the volume variation and raising electrical conductivity . Under the N-CS@C/G composites with the improved synergistic effect that served as anode, the cell exhibited progressive cycle stability of 662 mA h g −1 at 2 A g −1 when 600 cycles were completed, the high specific capacity of 1039.7 mA h g −1 at 0.05 A g −1 , as well as prominent rate capability, outperforming the parallel comparison materials without the addition of glucose (N-CS) or reduced graphene oxide (N-CS@C). This study is likely to develop a distinctive avenue to produce quick and high-capacity metal sulfide anodes and boot high-performance lithium-ion batteries.
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 ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Dingcheng Sun,Le Zhang,Shengjie Wei,Xu Zhang,Haiyang Xu,Xuan Tong,Xu Ji,Yue Yang
The development of durable, high-performance electrocatalysts capable of sustaining industrial-level current densities is critical for advancing alkaline water electrolysis. In this work, we present a hierarchical Co 9 S 8 /NiS heterojunction directly grown on nickel foam via hydrothermal and controlled sulfurization process. The self-supported electrode delivers low overpotentials of 260 mV (OER) and 40 mV (HER) at 10 mA cm −2 in 1 M KOH. Long-term stability tests of OER and HER respectively confirm 95 % and 96 % current retention at 100 mA cm −2 over 30 h. When employed in a two-electrode configuration, the Co 9 S 8 /NiS@NF electrode pair achieves 10 mA cm −2 overall water splitting at just 1.38 V, outperforming most reported transition-metal sulfide systems. Comprehensive structural and spectroscopic analyses reveals that intimate electronic coupling at the Co 9 S 8 /NiS interface, together with abundant sulfur vacancies, synergistically optimizes charge distribution and lowers kinetic barriers. Moreover, the integrated nano-flower and nano-needle morphology of self-supporting integrated electrode provides an expanded electrochemically active surface area and efficient mass-transport channels. This dual-modulation strategy—combining heterojunction engineering with defect chemistry—provides a scalable path for designing non-precious-metal electrocatalysts that meet the demands of practical hydrogen production.
研究领域:
电化学
·
材料科学
·
纳米技术
·
能量转换
·
催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Hanmeng Liu,Zhen Li,Zhixia Yao,Yaosheng Liu,Qifang Zhang,Yujing Sun,Zhuang Li
The three-dimensional (3D) MnS/Co 9 S 8 (MCS) micro-flowers composites with serrate edges on Ni foam were successfully prepared by a facile hydrothermal method . The time-dependent experiments showed that the structure was assembled by two-dimensional (2D) nanobelts . The serrate edges structures of MCS can enrich electroactive sites and enhance the specific capacity (1070 C/g at 1 A/g). In addition, MCS exhibited good cycling stability of 86% after 1000 cycles. Further, an asymmetric supercapacitor device was constructed by using MCS as the positive electrode and activated carbon (AC) as the negative electrode, which exhibited high energy density of 34.1 Wh/kg at power density of 400 W/kg with good cycling stability. The superior electrochemical performances demonstrated that the micro-flowers composites with serrate edges could offer a new opportunity in developing energy storage devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 23
·期 40
·9517-9524
·
IF 5.317
Peiyuan Zeng,Jianwen Li,Ming Ye,Kaifeng Zhuo,Zhen Fang
Graphical Better batteries : Co 9 S 8 /N-C hollow spheres were successfully synthesized through synchronous pyrolysis and sulfurization of ZIF-67 (see figure). These structures deliver a distinguished performance when applied as the anode in lithium-ion batteries. Co 9 S 8 is considered a promising candidate as the anode material in lithium-ion batteries (LIBs) because of its remarkable electrical conductivity, high theoretical capacity, and low cost. However, the practical application of Co 9 S 8 is greatly restricted because of its poor cycling stability and rate performance, which result mainly from the large volume expansion and dissolution of the polysulfide intermediates during the charge/discharge process. In this report, Co 9 S 8 embedded in N-rich carbon hollow spheres are successfully designed and synthesized through an in situ pyrolysis and sulfurization process, employing the well-known ZIF-67 as the precursor and ethanethiol as the sulfur source. Co 9 S 8 nanoparticles embedded in the N-rich hollow carbon shell exhibit excellent lithium storage properties at a high charge/discharge rate. A discharge capacity of 784 mAh g −1 is obtained upon battery testing at a current density of 1 C (544 mA g −1 ). Even upon cycling at a current density of 4 C, the as-prepared Co 9 S 8 /N-C can still deliver a discharge capacity of 518 mAh g −1 . The excellent battery performance can be attributed to the hollow structure as well as the N-rich carbon encapsulation. Moreover, this metal–organic framework sulfurization route also shows good generality for the synthesis of other metal sulfide–carbon composites such as ZnS/N-C and Cu 2 S/C.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Jiongyu Chen,Zhi Liu,Yuchen Liu,Zhen Cheng,Jingze Zhang,Qinghong Zhang,Yaogang Li,Chengyi Hou,Kerui Li,Hongzhi Wang
Efficient and affordable electrocatalysts are a crucial part of rechargeable zinc air batteries (ZAB) to address the problems caused by the sluggish activity of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) on the cathode. Anchoring noble metals on transition-metal-based substances is a promising strategy to reinforce electrochemical activity and reduce the cost. Herein, we have developed a subsequent spontaneous-redox strategy to load Pt nanoparticles with 3.75% containing NiFe-LDH nanoflakes to boost the ORR activity. After that, NiFe-LDH@ Co9S8 is constructed as a rational design for bifunction catalysis. In the ORR process, the half-wave potential of the obtained catalyst, Pt-anchored NiFe-LDH@Co9S8, is 0.83 V vs RHE, showing better catalytic activity than Pt/C. In the OER process, the obtained catalyst exhibits a low overpotential of 280 mV, which is superior to that of RuO2. Notably, aqueous ZAB and quasi-solid-state ZAB achieve peak power densities of 164.3 and 78.4 mW cm–2, respectively. Furthermore, quasi-solid-state ZAB exhibits a long cycle lifespan for 240 cycles in 80 h, and a remarkable stability after bending for 50 cycles. This work paves the way for the design of the NiFe-LDH nanostructure by vacancy engineering.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xiaojing Zhu,Qikai Wu,Jiale Dai,Dengke Zhao,Chenghao Yang,Ligui Li,Nanwen Li,Shaowei Chen
Directly pyrolyzing organometal complex represents a judicious strategy to fabricate efficient multifunctional carbon-based electrocatalysts , but the structure/composition of the catalysts is commonly complicated and the corresponding electrocatalytic activities are usually compromised. In this study, we report a selective leaching route to prepare small Co 9 S 8 nanoparticles supported on nitrogen, sulfur codoped porous carbon nanosheets (Co 9 S 8 @PNSC) by pyrolyzing sheet-like Co(II)-coordinated thiourea-ethylenediamine-formaldehyde resin (Co-TEFR)/polydopamine (PDA) hybrids that are covered by silica shell layer, followed by removal of the silica and Co nanoparticles with NH 4 HF 2 through a wet etching method. Consequently, the resultant Co 9 S 8 @PNSC exhibits high specific surface area, hierarchical porosity and tiny Co 9 S 8 nanoparticles, which are conducive to the maximal utilization of active sites, endowing remarkable oxygen electrocatalysis with a half-wave potential of +0.845 V for oxygen reduction reaction and a low overpotential of 314 mV at current density of 10 mA cm −2 for oxygen evolution reaction. Besides, such composite also shows a considerable electrocatalytic performance for hydrogen generation. When applied in an assembled zinc-air battery, Co 9 S 8 @PNSC displays a high power-density (203 mW cm −2 ) and favorable cycling lifespan. The results from the present strategy may provide an exemplification in rational design and fabrication of carbon-based nanocomposite for high-performance multifunctional electrocatalysis.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2018
·Vol. 6
·期 3
·748-756
·
IF 4.446
Yuan-Sheng Cheng,Min Ling,Bin-Bin Jiang,Fang-Hui Wu,Zi-Hao Zhao,Xiao-Ning Li,Peng-Fei He,Xian-Wen Wei
Graphical A three-dimensional composite is synthesized by a simple two-step method and applied as a highly active pH-universal electrocatalyst for the hydrogen evolution reaction. The material is stable in acid, neutral, and alkaline media. Developing high-performance non-noble-metal electrocatalysts for the hydrogen evolution reaction (HER), which can be stably operated under various conditions is highly required in realistic production. In this work, a hierarchical architecture consisting of MoS 2 and Co 9 S 8 anchored on a reduced graphene oxide (rGO) substrate was first synthesized, then by introducing blank graphene oxide (GO) and multi-walled carbon nanotubes (CNTs), interconnected three-dimensional (3D) composite aerogels with high conductivity were obtained, showing a high activity for the HER, with low overpotentials (η 10 ) at about 90 mV (0.5 M H 2 SO 4 ), 176 mV (1.0 M PBS), and 102 mV (1.0 M KOH). The high performance might be caused by special hierarchical 3D structures maximally exposing the active edges of both MoS 2 and Co 9 S 8 . Additionally, 3D MoS 2 /Co 9 S 8 /rGO-CNTs showed a superior stability and could work stably under different conditions for more than 20 h or 1000 cycles, which is attributed to the good crystallinity after annealing, the highly symmetrical structures between Co 9 S 8 and MoS 2 , and robust protection provided by the 3D carbon substrate. The results presented herein may provide an effective way to develop non-noble-metal electrocatalysts for different fields including the HER.
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
·
2020
·
IF 7.489
Linghao He,Shunjiang Huang,Yongkang Liu,Minghua Wang,Bingbing Cui,Shide Wu,Jiameng Liu,Zhihong Zhang,Miao Du
In view of the importance of multifunctional catalysts that can drive different electrocatalytic reactions in the same electrolyte solution, we designed and prepared a series of multicomponent nanohybrids composed of Co 9 S 8 and MoS 2 derived from cobalt-doped polyoxometalate (Co-POMs) by one-pot calcination method. The obtained Co 9 S 8 @MoS 2 nanohybrids were composed of Co 9 S 8 , MoS 2 , Co-Mo-S phases and assembled nanosheets, and therefore were explored as trifunctional electrocatalysts for hydrogen evolution reaction, oxygen evolution reaction, and methanol oxidation reaction (MOR) in an alkaline medium. The nanostructure and chemical components of the series of Co 9 S 8 @MoS 2 nanohybrids can be modulated by changing the mole ratios of H 5 Mo 12 O 41 P to Co(NO 3 ) 2 precursor. Compared with the sole component and other reported Co 9 S 8 @MoS 2 nanohybrids, the Co 9 S 8 @MoS 2 nanohybrid prepared from the 1:1 ratio of PMo 12 and Co(NO 3 ) 2 exhibited superior MOR catalysis efficiency (121.4 mA cm −2 ) and an extremely low overpotential (1.49 V) for overall water splitting at a current density of 10 mA cm −2 owning to the effective synergism among Co 9 S 8 , MoS 2 , and Co-Mo-S phase. Overall, this study provides a feasible approach to developing efficient and stable trifunctional bimetal electrocatalysts for clean-energy applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Chengyuan Yang,Jing Wang,Rong Wang,Wenxin Zhu,Liang Zhang,Ting Du,Jing Sun,Ming-Qiang Zhu,Yizhong Shen,Jianlong Wang
Multi-pollutants environment coexisted organic and inorganic pollutants has become a common phenomenon, seriously affecting water biodiversity and human water security. Currently, the removal of organic and inorganic pollutants by photocatalysis are mostly in own single-pollutant environment, not in multi-pollutants system, where the common photocatalysts cannot achieve efficiently charge separate and transfer with low reactive oxygen species (ROS) efficiency. Herein, we constructed an efficient cascaded Z-scheme heterojunction Co 9 S 8 @defective ZnS/g-C 3 N 4 (C@DZ/N) composed of defective engineering in hollow nanocubes, which achieved excellent photodegradation activity (98.93 % for ciprofloxacin (CIP) and 97.18 % for Cr(VI) at 90 min) in multi-pollutants environment, significantly higher than the hollow cubic with Z-scheme heterojunction in single-pollutant environment (98.07 % for CIP and 98.72 % for Cr(VI) at 140 min). Defective ZnS acts as the core for direct charge transfer and separation to form a unique cascaded Z-scheme heterojunction system that blocks the type II charge transfer pathway to achieve ultra-efficient charge transfer. Furthermore, the structural characterization and ROS experimental results based on multi-pollutants models show that the cascade Z-scheme system greatly facilitates the ROS release kinetics and further leads to more electron-deficient cubic surfaces while increase the directional conversion to singlet oxygen ( 1 O 2 ) in multi-pollutants environment. Further tests of intermediates and reusability indicated its potential for the high-efficient treatment of multiple pollution systems.
研究领域:
环境科学
·
材料科学
✓ 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）