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
RSC Advances
·
2023
·Vol. 13
·期 2
·1049-1058
·
IF 3.9
Adham Hussein Abdullah Farea Al-akhali,Zhengqiang Tang
Oil–water separation using porous superhydrophilic materials is a promising method to circumvent the issue of oil-polluted water by separating water from oil–water mixtures. However, fabricating metal-based porous superhydrophilic materials with stable superhydrophilicity that can recover their strong hydrophilicity and have acceptable oil–water separation efficiency without complex external stimuli is still a challenge. Inspired by the anti-wetting behavior of broccoli buds, this study successfully fabricated metal-based superhydrophilic and underwater superoleophobic porous materials by hydrothermal treatment of stainless steel meshes (SSMs) combined with magnetron sputtering of metallic Ti and W. The process was then followed with annealing at 300 °C for 4 hours. The effects of coating materials, annealing temperature, and surface structure on the wetting behavior of the prepared meshes were studied and analyzed. The modified meshes exhibited unique broccoli-like microstructures coated with thin TiO2−xNx/WO3 films and showed superhydrophilicity with a 0° water contact angle (WCA) and underwater superoleophobicity with underwater oil contact angles (UOCAs) higher than 155°. They also maintained strong hydrophilicity for more than three weeks with WCAs of less than 13°. Besides, they could recover their initial superhydrophilicity with a 0° WCA after post-annealing at 80 °C for 30 minutes. Notably, the broccoli-like structures and the strong hydrophilic coatings contributed to a significant water flow rate (Q) of 3650 L m−2 h−1 and satisfactory oil–water separation efficiency of 98% for more than 15 separation cycles toward various oil–water mixtures. We believe that the presented method and fabricated material are promising and can be applied to induce hydrophilicity of various metallic materials for practical applications of oil–water separation, anti-fouling, microfluidic transport, and water harvesting.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Feiran Li,Bharat Bhushan,Yunlu Pan,Xuezeng Zhao
Oil contamination is pressing environmental and natural resource issues. Oil-water separation technology can be used for water purification . Traditional methods are either time consuming or energy intensive. Bioinspired materials with combination of affinity and/or repellence towards oil and water in mesh-based methods have attracted widespread attention in the oil-water separation. Among existing materials, superhydrophobic/superoleophilic materials are prone to contamination by oil. Superhydrophilic/underwater superoleophobic materials can only operate underwater which restricts the practical use. In contrast, superoleophobic/superhydrophilic materials are desirable for oil-water separation. However, traditional mesh-based method cannot be used for separation of emulsions since the dispersed microdroplets can easily pass through the mesh pores. Superhydrophobic/superoleophilic cotton has been used for separation of water-in-oil emulsions. In this study, a facile method to fabricate bioinspired superoleophobic/superhydrophilic cotton was developed. The functionalized cotton exhibits an oil-repellent and water-wetting behavior and is capable of separating both immiscible oil-water mixtures and also oil-in-water emulsions without oil contamination. This developed cotton is of interest for various applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Nan Chen,Shengtao Gao,Zijian Zong,Yingyu Wang,Dejin Xu,Chuanlei Zhu,Peiyuan Chen
This paper proposes using coal gangue powder (CGP) as an alternative to silica fume (SF) in cement-based systems, towards to high-value recycling of this coal waste. In cement-based systems, CGP offers a more affordable substitute for SF as a supplementary cementitious material. Mechanical activation enhances CGP’s reactivity by inducing structural disorder and increasing surface area, which facilitates its participation in hydration reactions. Additionally, its water retention capacity contributes to prolonged hydration and improved microstructural densification. Employing techniques such as BET analysis, rheological testing, XRD, TG-DTG, hydration kinetics, compressive strength and nanoindentation, the research compares the effects of CGP and SF on paste properties. The results indicate that SF increases plastic viscosity by 9.18 %–30.61 % and enhances compressive strength by 4.68 % at 28d, while CGP-added pastes show slight plastic viscosity to gain more distinctive rheological properties. CGP-added pastes demonstrate a comparable cumulative mass loss in TG-DTG, highlighting its positive impact on cement hydration. Additionally, CGP modifies the pore structure, increasing gel pore volume at lower dosages while maintaining a balanced distribution at higher dosages. These findings suggest that mechanically activated CGP can partially replicate SF’s effects on hydration and microstructural refinement, providing a sustainable and economical approach to enhancing cement-based materials.
研究领域:
建筑材料学
·
资源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2016
·
IF 3.997
Qiang Wang,Bing Dai,Jie Bai,Zhenhuai Yang,Shuai Guo,Yujie Ding,Lei Yang,Pei Lei,Jiecai Han,Jiaqi Zhu
A simple and efficient strategy is introduced for fabricating a layer of superhydrophobic and superoleophilic membrane on the surface of porous materials by self-assembly, and it is of great interest for the new type separation of oil and water. It is realized in this study by synthesizing an array of vertically aligned composite microcones on the surface of nickel foam by microwave plasma assisted chemical vapor deposition . The hierarchical structure, high aspect ratio , and dual-scale pine tree-like nature of the microcones formed on the nickel foam, which has microscale pores, in combination with the low surface energy of carbon, amplify both the hydrophobicity and the oleophilicity of the membrane. In addition, the membrane exhibits pH-responsivity, and the controllable water permeation can be realized by simply altering the water pH. Given its extremely high hydrophobicity and oleophilicity as well as outstanding mechanical durability, the composite frame can be used as a filter to separate oil/water mixtures and as an intelligent sponge to purify oil-contaminated water with excellent separation efficiency and absorption capacity . It should also be ideal for real world use in various environmental and chemical separation processes.
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
LANGMUIR
·
2024
·
IF 3.7
Fanxi Yang,Jinling Zhang,Jie Pan,Yangli Liu,Yanchong Yu,Shebin Wang
Corrosion is an unavoidable issue that steel encounters during service; however, the generic methods employed for corrosion prevention often need high cost or preparation conditions. In this study, a facile chemical replacement deposition method was proposed to realize an anticorrosion superhydrophobic coating on a X80 steel surface. The growth mechanism of the rough structure and its impact on the wettability of the superhydrophobic coating were analyzed. The superhydrophobic coating, deposited for 50 s and modified for 30 min, achieved optimal electrochemical properties and a maximum water contact angle. The immersion test, in the saturated CO2 oilfield produced water, demonstrated the better corrosion resistance of superhydrophobic coating than X80 steel. Correspondingly, a kinetic corrosion model was established to analyze the anticorrosion mechanism. In summary, this method significantly improves the corrosion resistance of X80 steel and is attractive for other industrial fields.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WOOD SCIENCE AND TECHNOLOGY
·
2020
·Vol. 54
·期 5
·1223-1239
·
IF 2.109
Wang Zhangheng,Zou Weihua,Sun Delin,Ji Xiaoqin,Yu Minggong
To improve the hydrophobicity of wood, utilizing a silica/wax composite emulsion (PPW@SiO 2 ), which was prepared by maleic anhydride-grafted polypropylene wax (PPW) and nanosilica, served as a hydrophobic agent. The hydrophobicity modifying process of fast-growing poplar was carried out by heating permeation and hot pressing to prepare in-depth hydrophobic wood. The results show that the hydrophobic agent can fill the pores of poplar partly and form a two-dimensional, “petal-like”, rough hydrophobic structure in the pores. The water contact angle (WCA) on the surface of modified poplar can reach 140.3° when the amount of SiO 2 is 1%. Even after surface grinding of 3 mm, the WCA is still higher than 130°, indicating the hydrophobic wood has a good performance of in-depth hydrophobicity. Furthermore, the surface of hydrophobic wood presents an exceptional self-cleaning function, and the physical and mechanical properties are also improved. Compared with a reference sample, the density, surface hardness, modulus of elasticity, compressive strength, and modulus of rupture of hydrophobic wood are increased by 66.67%, 53.16%, 55.60%, 49.50%, and 40.87%, respectively, and the water absorption in hydrophobic wood is also significantly decreased.
研究领域:
材料科学
·
木材工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2021
·
IF 4.641
Bing Bai,Linlin Qiu,Deqiang Mei,Zhengfei Jin,Lixin Song,Pingfan Du
The use of a support may overcome the limitations of nano-photocatalysts (poor recyclability, secondary pollution, and agglomeration that decreases photocatalytic activity); however, supports such as fibers, fabrics, films, and foams, still exhibit many defects (low loadings, non-uniform particle loadings, and insufficient loading firmness). In this study, we fabricated TiO 2 /porous carbon fiber cloth through a microwave hydrothermal method and thermal reduction. The highly porous structure of fiber could provide abundant space to firmly-supported TiO 2 nanoparticles. Therefore, the results showed that large amounts of TiO 2 were uniformly and firmly loaded onto the porous carbon fiber cloth, and the obtained composite exhibited excellent photocatalytic activity. The initial loading rate reached 51 wt.%. Even after 10 photocatalytic cycles, the pollutant degradation rate exceeded 95%, and 55% of TiO 2 was retained, showing its stability. This investigation provides a method to prepare supported photocatalysis, which can greatly promote their practical applications for wastewater treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2022
·
IF 8.857
Xiaoya Zang,Jing Wang,Yong He,Xuebing Zhou,Deqing Liang
Tetrabutylammonium bromide (TBAB) is a typical thermodynamic additive that can enhance the hydrate equilibrium temperature . Additionally, semi-clathrate hydrates formed from TBAB solutions exhibit reasonable CO 2 adsorption performance. In this study, TBAB hydrates were synthesized to determine their carbon capture capacity from a ternary gas mixture of CH 4 /CO 2 /N 2 (0.5/0.4/0.1). We measured the effect of temperature, pressure, and TBAB mass fractions (0.05–0.2) on the formation of gas hydrates, which were analyzed using Raman spectroscopy, powder X-ray diffraction (PXRD), and cryo-scanning electron microscopy (Cryo-SEM). With a 0.05 TBAB aqueous solution, the maximum recovery factor of CH 4 was 1.646 at 290.1 K and 7.0 MPa, whereas the maximum CO 2 split ratio was 0.454 at a pressure of 7.0 MPa and temperature of 280.1 K. Furthermore, the cryo-SEM images revealed that the addition of TBAB significantly increased the specific surface area of the hydrate crystals compared with the pure water system. PXRD and Raman spectroscopy showed that the hydrate structure transformed from a SI to a semi-clathrate hydrate. The hydrate samples formed from the 0.05 TBAB solution were found to be type A and B, leading to greater gas consumption. These results are expected to provide support for hydrate gas separation technology.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Adham AL-AKHALI,Kaixun NIE,Duoxun FANG,Zhengqiang TANG
Fabricating underwater superoleophobic surfaces is an advanced technique for controlling undesirable oil and wax adhesion on engineering structures and household appliances. This article presented a facile method based on the combination of laser ablation of stainless steel substrates followed by magnetron sputtering of a metallic tungsten target to fabricate superhydrophilic and underwater superoleophobic surfaces. The results showed that the laser-ablated stainless steel substrate without coatings exhibited hydrophilicity and underwater oleophobicity. However, its transition to superhydrophilicity and underwater superoleophobicity with a 0° water contact angle and higher than 156° underwater oil contact angles occurred after the deposition of a thin tungsten film followed by annealing at 300 °C. The prepared surface maintained its wetting behavior for more than 4 weeks, even in corrosive aqueous HCl and NaOH solutions. According to the data from SEM and XPS, this distinguished wetting behavior resulted from the presence of the regular microscale texture patterns, abundant hydroxyl content, and low carbon content on the tungsten layer after annealing at 300 °C. Thus, laser ablation combined with magnetron sputtering of tungsten demonstrated effective results in fabricating superhydrophilic and underwater superoleophobic surfaces that are independent of the initial wetting of the substrates.
研究领域:
材料科学
·
表面工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Guoxin Zhu,Xiong Zhang,Yan He
Superhydrophilic-superoleophobic materials possess unique advantages in oil-water separation due to their water permeability and oil repellency. In this study, superhydrophilic-superoleophobic sand (CQS) was prepared using a facile and rapid mixing-drying coating method. Quartz sand was modified with polydopamine (PDA) as the hydrophilic binding agent, fluorosurfactant (FS-50) as the oleophobic agent, and CaCO 3 /SiO 2 to construct hierarchical surface roughness. The CQS exhibited a water contact angle of 0° and an oil contact angle of 154°, which resulted in a slightly increased water adhesion capacity and a significantly reduced oil adhesion capacity. Owing to its selective wettability towards oil and water, the CQS was capable of directly separating immiscible oil-water mixtures and oil-in-water emulsions with high separation efficiency (99.5 % and 98.5 %, respectively), driven by gravity. Moreover, immiscible oil/oil mixtures could be effectively separated by the CQS as well, expanding its application to separating immiscible organic liquids with different polarities. Additionally, the CQS demonstrated good reusability and superior stability against acid, alkali, salt, hot water and mechanical abrasion. These properties ensured its applicability in complex environments. The CQS, with exceptional separation capability and stability, holds promising prospects for future applications in related separation field.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Zhuoming Wei,Mengwei Guo,Qibo Zhang
Water electrolysis is a promising technique for green hydrogen production to achieve the global strategic goal of carbon neutrality . Herein, we propose an optimized-electrodeposition set-up in Ethaline-based deep eutectic solvent (DES) for the electrochemical preparation of NiFe-based catalysts. The developed synthesis procedure involves the anodic dissolution of Fe plates to provide Fe sources, which are gradually incorporated into the in-situ grown Ni films to fabricate NiFe-based electrodes. Our findings show that introducing nitrate ions coupled with electrochemical water oxidation can induce the formation of multi-vacancy-rich NiFe-based catalysts with outstanding water splitting performance in quasi-industrial conditions. A simulated industrial anion exchange membrane (AEM)-based device loaded with our NiFe-based electrocatalysts requires only 1.73 V cell to reach 1000 mA cm −2 in 5.0 M KOH at 60 °C and works continuously for up to 200 h. The present work provides a means for the scalable synthesis of self-supported NiFe-based catalysts for industrial water splitting.
研究领域:
电化学
·
材料科学
·
可持续能源
·
催化
·
化工工程
✓ 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）