Nanomaterials
·
2025
·Vol. 15
·期 9
·697
·
IF 4.3
Yuanqi Peng,Lezhu Su,Meng Liu,Chen Zeng,Bo Xiang,Zhuoyao Xie,Zijing Hu,Nan Zhou
The development of green, efficient, and stable pesticides for controlling agricultural pathogens remains a critical research focus. Elemental sulfur, although widely used for its bactericidal and insecticidal properties, suffers from aggregation, poor dispersibility, and limited contact with target organisms, restricting its effectiveness. In this study, we synthesized a novel biochar–sulfur composite by combining sustainable biochar with sulfur at low temperatures. The resulting material exhibited enhanced dispersibility and a five-fold increase in bactericidal efficacy compared to sulfur alone, as demonstrated in tests againstR. solanacearumandE. coli. Additionally, the composite maintained 80% efficacy after five cycles of use, highlighting its favorable cyclic performance. Mechanistic studies revealed that biochar accelerates sulfur’s redox reaction, generating free radicals that drive efficient bactericidal action. This work provides a simple and sustainable approach for developing sulfur-based antimicrobial pesticides, offering new opportunities for sulfur utilization in agriculture.
研究领域:
农业科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 18
·2100156
·
IF 18.808
Wei Sun,Wenqing Zhao,Shaohui Yuan,Liming Zhang,Yue Yang,Peng Ge,Xiaobo Ji
Engineering advanced sodium-ion storage materials with considerable kinetic behaviors have triggered a series of active explorations. However they still suffer from interfacial gaps and uncompleted redox reactions, bringing about poor rate abilities. Herein, through the strategy of salt-fixed and thermochemical manners, the CoSe 2 /O C with interfacial chemical Co O C bonds are successfully prepared, displaying the reduced particles and optimized structural features. Meanwhile, from the analysis of long-term phase changing curves and ex-situ technologies, the CoSe 2 would be decomposed into CoSe and Se phases but captured by the synergistic effect of their physical-chemical evolutions, while the structure and new-type are stabilized after cycling. Profiting from the “bridge” roles of bonds, the electrons are effectively accelerated with the deepening redox reactions. As expected, based on these advantages, the ultra-fast abilities are reached about 346 mAh g −1 at 15.0 A g −1 after 3500 cycles, and their capacity of full-cells are also kept at about 326 mAh g −1 (cathodes Na 3 V 2 (PO 4 ) 3 @C vs anodes CoSe 2 /O C). The detailed analysis of kinetic behaviors strongly demonstrated that the increased interfacial charge storage and conductivities are crucial for promoting the ions-storage abilities. Given this, the rational work is anticipated to provide significant strategies for advanced energy-storage materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Xiao Zheng,Xiaoqi Han,Wenjiao Yao,Liangming Wei,Jie Zhu,Yongbing Tang
The aluminum–sulfur battery is an ideal energy storage device with the merits of low cost, safety, and high energy density. However, due to the poor conductivity of sulfur and its soluble discharge products, the kinetics of sulfur and polysulfide redox reactions are very slow. Herein, a porous flaky Ti3C2Tx-Co host material is designed, which can form a Ti3C2Tx-CoSx heterostructure in situ with sulfur. The unique heterostructure provides many catalytic anchoring sites and active sites for enhancing the adsorption and conversion of sulfur and polysulfides. Compared with pure Ti3C2Tx, Ti3C2Tx-CoSx greatly reduces the decomposition energy barrier of discharge products and accelerates the redox kinetics of sulfur species. The Ti3C2Tx-CoSx@S cathode realizes fast charging at 1 A g−1 and achieves a long cycle life of 1000 cycles with discharge capacities in the range of 215–358 mA h g−1. Even at 1.5 A g−1, the cathode can still achieve a capacity greater than 190 mA h g−1 for over 1500 cycles. Using Ti3C2Tx-Co as the host of sulfur, a reversible redox reaction among S, S− and S2− occurred during the charge–discharge process, indicating its potential for use in high-performance Al–S batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yezi He,Jerosha Ifthikar,Lie Yang,Zhuqi Chen
A cross-linked chitosan-modified birch sawdust biochar (CS@BSBC) was prepared and applied for the simultaneous elimination of vanadium (Ⅴ) and sulfamethoxazole (SMX) from livestock wastewater. The adsorption capacity of V(V) reached 110 mg/g alone while this value was promoted to 150 mg/g for the simultaneous removal of SMX and V(V), and the adsorption effect is optimal at pH 3. The adsorption capacity of SMX reached about 30 mg/g alone, while the SMX’s adsorption capacity droped to 25 mg/g for the simultaneous removal of SMX and V(V). The mechanism studies disclosed that redox reactions occur on the surface of CS@BSBC. As revealed by the XPS spectra, 63 % of V(V) was reduced to V(IV) concurrently pyrolic nitrogen and C−O terminals were oxidized to nitrogen oxide and C O. The treatment mechanism of CS@BSBC described above can provide a reference for the subsequent treatment of livestock wastewater with complex composition and high vanadium content.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Kaiyue Zhang,Bin Feng,Hong Wang,Lijie Liu,Liang Hu,Hui Zhao,Zeyu Xu,Xihao Zhang,Jianguo Liu
Vanadium flow batteries (VFBs) face critical challenges in power density due to sluggish redox kinetics and inefficient mass transport. Herein, we propose a dual-functional strategy that synergistically addresses both limitations through precursor morphology engineering. By precisely regulating hydrothermal crystallization kinetics, cobalt carbonate hydroxide (CCH) precursors evolve from 1D nanorods to 2D nanosheets, which transform into Co 3 O 4 nanoarrays after annealing while retaining structural features. The resulting 1D rod-like architectures create open mesoporous channels for rapid ion diffusion, while defective Co 3 O 4 surfaces enriched with oxygen vacancies enhance redox kinetics. DFT calculations reveal that oxygen vacancies upshift the Co d-band center in Co 3 O 4 , strengthening vanadium ion adsorption and accelerating redox reactions. Finite element analysis demonstrates that the rod-like microstructure enhances mass transport and reduces concentration polarization, while its uniform potential distribution suppresses parasitic side reactions. As a result, the VFB with Co 3 O 4 @CF-90 achieves a high energy efficiency of 74.4 % at 300 mA cm −2 , outperforming conventional carbon felt by 9.7 %, and maintains 80.2 % efficiency at 200 mA cm −2 over 400 cycles. This work establishes a scalable morphology-induced vacancy engineering paradigm for high-performance flow battery electrodes, decoupling catalytic and transport optimization through precursor design.
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 POWER SOURCES
·
2025
·
IF 7.9
Jiale Wang,Xinrui Qiang,Bingzhe Jia,Lei Wang,Jiarui Li,Haibo Che,Yichi Liu,Zhiqiang Li,Xinming Wu
MXene shows great potential in the field of flexible electrodes owing to its distinctive two-dimensional structure, high conductivity, and large specific surface area. Nonetheless, during repeated bending, the bonding between the electrode and the conductive substrate weakens, which leads to a decrease in conductivity and, ultimately, a decline in the cycling stability of flexible devices, limiting their practical applications. Based on this, this paper presents the preparation of a MXene-Ag composite with excellent flexibility and cycling stability through a simple redox reaction. Electrochemical performance tests reveal that the material achieves a high specific capacitance of 191 F g −1 at a current density of 1 A g −1 and demonstrates an impressive capacity retention of 95.8 % after 10000 cycles at 5 A g −1 . To further assess the electrochemical performance under bending conditions, MXene-Ag//AC flexible asymmetric solid-state supercapacitors are assembled. Surprisingly, after 1250 charge/discharge cycles at bending angles of 30°, 60°, and 90°, the device still maintains a capacitance retention of 97.2 % (5 A g −1 ), which is a 7 % increase compared to before Ag loading. This demonstrates that the addition of Ag contributes to the improved electrochemical cycling stability of the flexible device.
研究领域:
材料科学
·
纳米技术
·
电化学
·
能源存储
·
柔性电子器件
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Peng Wang,Shafidah Shafian,Feng Qiu,Xiao Zhang,Yuping Zhao,Bin Wu,Kyungkon Kim,Yong Hua,Lin Xie
2,2′,7,7′-Tetrakis( N , N -di(4-methoxyphenyl)amino)-9,9′-spirobifluorene (Spiro) is an essential hole-transport material used in perovskite solar cells (PSCs). However, the redox reaction of Spiro and its impact at the interface with the metal electrode are not yet fully understood. In this study, we introduced a crystalline additive (CA) to regulate the redox process of Spiro and its interface with an Ag electrode. Our findings indicate that CA functions as a molecular scaffold, improving the crystallinity and stability of radicals in Spiro throughout the entire redox reaction. This enhancement increases the hole mobility of Spiro and strengthens the internal electric field, thereby improving hole extraction and transport efficiency at both interfaces. Moreover, the optimized redox reaction of Spiro reduces energy loss at the Ag electrode, significantly boosting the power conversion efficiency to 25.21%. Furthermore, CA mitigates the aggregation of lithium salt and enhances the stability of the device. Our findings contribute to a deeper understanding of hole-transport mechanisms of Spiro and emphasize the importance of reducing energy loss at the Spiro/Ag electrode interface in PSCs.
研究领域:
材料科学
·
能源研究
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2018
·Vol. 317
·期 3
·1223-1233
·
IF 1.181
Liu Zhirong,Yu Jiehao,Yang Lingfang,Dai Ying,Wang Yun,Zhou Liming
Three kinds of method were employed to prepare Fe loaded activated carbon (Fe-AC), liquid reduction method, carbonthermal method, incipient wetness method, respectively. Before and after adsorption, the adsorption property of Fe-AC had been analysed.
Results indicated that the removal mechanisms were mainly redox reaction, adsorption and precipitation. In addition, the adsorption models fitted with the kinetic model and adsorption isotherm model. Based on the analysis of six influencing factors, we obtain some actual information to deal with the humic acid and the “back to acid”.
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
Materials Today Energy
·
2020
·
IF 5.604
J. Zhao,W. Guo,Y. Fu
Lithium–selenium (Li–Se) batteries are promising high-energy battery systems. However, they suffer from shuttling effects of soluble lithium polyselenide intermediates and poor cycling stability. Herein, we use diphenyl diselenide (DPDSe) as an electrolyte additive to alter the redox reactions of selenium. The Li|Se-DPDSe cell shows the maximum discharge capacity of 643 mAh/g at 0.3 °C in the first few cycles, which is 94.7% of the theoretical specific capacity. After 250 cycles, it still maintains a reversible capacity of 602 mAh/g, possessing 93.6% of the initial capacity with Coulombic efficiency of almost 100%. DPDSe brings a new electrochemical reduction pathway leading to a high discharge voltage plateau. In the charge process, some selenium atoms are integrated into the structure of DPDSe to form diphenyl triselenide which adheres to carbon nanotubes therefore reducing the loss of active material. This study reveals intriguing electrochemical reactions of organoselenides and provides guidance for the optimization of electrolyte for stable Li–Se batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Ning Pan,Minjie Chen,Junjie Tan,Lei Liao,Rong Nie,Jianpeng Xu,Run Lei,Hao Zou,Hao Lei,Zhijie Chen,Xiaoqin Nie
Fabricating efficient copper-based adsorbents for radioactive iodine removal is crucial for environmental protection and waste volume reduction, particularly in the treatment of radioactive waste from hospitals. In this study, a composite of reduced graphene oxide (RGO) supported by Cu-Cu 2 O nanocrystals (Cu-Cu 2 O/RGO-3) was synthesized via a one-step method and evaluated for its effectiveness in iodide removal from water. The composite was comprehensively characterized using XRD, SEM, FT-IR, and XPS analyses. The effects of copper content, pH, contact time, iodide concentration, temperature, and coexisting anions on iodide uptake were systematically investigated. In the Cu-Cu 2 O/RGO-3 composite, copper primarily existed as metallic Cu, along with a small amount of Cu 2 O. Cu-Cu 2 O/RGO-3 exhibited a significantly higher I - adsorption capacity compared to Cu powder, effectively reducing I - concentrations from 8.6 to 0.029 mg/L within just 3 min, demonstrating a rapid uptake rate for trace I - . Furthermore, the maximum adsorption capacity reached 152.1 mg/g at pH 7.0, surpassing that of many reported copper-based adsorbents. The composite showed selectivity in the presence of competing ions like Cl - , NO 3 - , and SO 4 2- , but HCO 3 - at higher concentrations inhibited I - adsorption. Post-adsorption analysis revealed that iodine was present solely as CuI. XPS analysis indicated that residual carboxyl groups in RGO facilitated the oxidation of Cu and promoted redox reactions between Cu(OH) 2 and Cu, providing multiple pathways for generating additional Cu + ions, thereby enhancing I - adsorption. This study offers a practical approach for modifying carbon-based materials with copper compounds, emphasizing the potential of copper-based materials for effective iodide purification in wastewater treatment.
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 27
·期 5
·5108-5121
·
IF 2.914
Fu Binbin,Xie Fencun
A novel cellulose microcrystalline-manganese dioxide nanocomposite (CMC-NMO) was synthesized by the redox reaction between potassium permanganate and ethanol based on cellulose microcrystalline. The cellulose microcrystalline (CMC) as support providing growth sites for the manganese dioxide nanowhiskers produced by the redox reaction and its application for Pb(II) and Cd(II) removal from aqueous was investigated. The characterization of as-synthesized material was revealed by various spectroscopic and microscopic techniques. Infrared-transform infrared (FITR) indicates that the incorporation of manganese oxide to CMC does not change the initial structure of it. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) data show that the manganese dioxide nanowhiskers with a few nanometers are uniformly dispersed on the surface of cellulose. Kinetics experiments reveal that Pb(II) and Cd(II) adsorption on CMC-NMO is a fast process and pseudo-second-order model fits the adsorption better. The maximum adsorption capacities of Pb(II) and Cd(II) obtained from the Langmuir model are 290.8 mg/g and 67.4 mg/g, respectively. The mechanism is mainly attributed to surface complexation and electrostatic attraction by energy dispersive analysis of X-rays (EDAX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analysis. In addition, depth removal experiments show that the residual concentrations of Pb(II) and Cd(II) in natural water after adsorption are lower than 0.01 mg/L. The regeneration and cyclic utilizing studies indicate that CMC-NMO has good adsorption stability. Therefore, the results indicate that this material can be employed as a potential adsorbent for current serious Pb(II) and Cd(II) pollution caused by industrial emissions.
Graphical abstract
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 Materials Chemistry A
·
2020
·Vol. 8
·期 37
·19544-19554
·
IF 11.301
Juan Li,Youlong Xu,Yuan Zhang,Cheng He,Tongtong Li
Lithium–sulfur batteries (LSBs) have been exploited as advanced energy storage systems owing to their high theoretical specific capacity. However, the shuttle effect from lithium polysulfides (LiPSs) and the sluggish redox kinetics are the main obstacles hindering LSBs' commercialization. In this study, an efficient host material to adsorb LiPSs and regulate their redox conversion was designed. Nano-rod iron hydroxide/electrochemical exfoliated graphene (FeOOH/EG) composites were synthesized by a traditional hydrothermal method. After ball-milling and annealing with modified sulfur, the FeOOH/EG-S composite presents that the sulfur particle is surrounded by FeOOH/EG sheets. As evidenced by XPS results, the FeOOH/EG composite provides strong chemical bonding towards LiPSs with Fe–S, Li–O and S–C bonds. Potentiostatic discharging tests demonstrated that FeOOH/EG promotes the precipitation of solid-state Li2S. First-principle (DFT) calculations revealed that LiPSs are adsorbed by FeOOH within a range of adsorption energies from −1.07 eV to −5.7 eV, indicating that FeOOH has favourable affinity towards polysulfides. Meanwhile, the low diffusion energy barrier (0.07 eV and 0.11 eV) enables the fast diffusion of LiPSs across FeOOH, enhancing the redox reaction kinetics during the charge/discharge process. As a result, the prepared FeOOH/EG-S electrode delivers a reversible capacity of 1323 mA h g−1 at a current density of 0.1C. After charging/discharging for 500 cycles at a current density of 2C, the FeOOH/EG-S electrode displays a capacity of 733 mA h g−1, which shows a low capacity decay rate of ∼0.027% per cycle. This work will be quite inspiring to promote the commercialization of LSBs.
研究领域:
能源材料科学
·
电化学
✓ 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）