Small
·
2024
·
IF 13
Mingshuo Chen,Wei Sun,Hongtao Liu,Qiang Luo,Yining Wang,Jinmu Huan,Yongping Hou,Yongmei Zheng
Conventional fog collection efficiency is subject to the inherent inefficiencies of its three constituent steps: fog capture, coalescence, and transportation. This study presents a liquid bridge synergistic fog collection system (LSFCS) by synergistically utilizing a liquid bridge and interconnected porous superhydrophilic structures (IPHS). The results indicate that the introduction of liquid bridge not only greatly accelerates water droplet transportation, but also facilitates the IPHS in maintaining rough structures that realize stable and efficient fog capture. During fog collection, the lower section of the IPHS is covered by a water layer, however due to the effect of the liquid bridge, the upper section protrudes out, while covered by a connective thin water film that does not obscure the microstructures of the upper section. Under these conditions, a one-step fog collection mode is realized. Once captured by the IPHS, fog droplets immediately coalesce with the water film, and are simultaneously transported into a container under the effect of the liquid bridge. The LSFCS achieves a collection efficiency of 6.5 kg m −2 h −1 , 2.3 times that of a system without a liquid bridge. This study offers insight on improving fog collection efficiency, and holds promise for condensation water collection or droplet manipulation.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Yongming Hong,Jiali He,Cuiyun Zhang,Xinping Wang
The structure of water at the graphene oxide (GO)/water interface has received considerable attention due to the high performance of GO in a wide number of applications. In this work, a face-up geometry of sum frequency generation (SFG) vibrational spectroscopy was employed to deduce the structure of water at the GO/water interface in which GO nanosheets were covered onto the water surface via Langmuir compression. The SFG results showed that the intense OH stretching bands at the range of 3000–3600 cm–1 were predominant in the spectrum with high GO coverage, which is mainly due to the third-order susceptibility χ(3) response from the water orientation in the electrical double layer induced by the static electric field of the negatively charged GO surface. In addition, the second-order susceptibility χ(2) response was relatively weak, suggesting that a few water molecules formed a H-bonding network within the closest GO surface. This work is beneficial to the in-depth understanding of water in contact with GO-based materials.
研究领域:
材料科学
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表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2021
·
IF 6.165
Dongmei Li,Zhiwei Zhu,Da-Wen Sun
Raman spectroscopy has been employed for studying water structures in biomolecular aqueous solutions for decades but challenges remain to quantify the hydrogen bonding strengths in complex aqueous solution systems. In this study, four kinds of saccharide aqueous solutions were employed to investigate the quantitative relationship between the hydrogen bonding strength of water using confocal Raman microscopy and the Raman spectra of these solutions in the range of 3000–3800 cm −1 . Results showed that the enhancement effect of saccharide molecules on the hydrogen bonding strength of water increased with the concentration, and the degree of changes in the strength was related to the hydration capability and partial molal volume of saccharide molecules. An equation based on the average number of hydrogen bonds of water molecule was proposed to quantify the bonding strength in saccharide aqueous solutions with satisfactory accuracy as verified by T 2 relaxation time using nuclear magnetic resonance spectrometer.
研究领域:
生物化学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
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IF 5.107
Jun Li,Long-Fei Ren,Jiahui Shao,Yonghui Tu,Zhongbao Ma,Yuanxin Lin,Yiliang He
Electrospinning is a notable technique to prepare nanofibrous membranes with remarkable features required for membrane distillation (MD). However, hydrophobic membrane fabricated by electrospinning alone could hardly ensure a high flux. In this study, triple layer membrane that is composed of a PVDF-PTFE hydrophobic layer, a PET support layer, and a chitosan-polyethylene oxide (CS-PEO) hydrophilic layer, was fabricated by electrospinning. Firstly, the PVDF-PTFE and CS-PEO layers were optimized, whose contact angles and thicknesses were 144.3°, 55 μm and 20°, 75 μm, respectively. Then, the triple layer membrane (TL-M), dual layer membrane without hydrophilic layer (DL-M) were fabricated and tested in a DCMD process using 3.5 wt% NaCl as the feed to illustrate the effect of hydrophilic layer. The triple layer composite membrane (average flux: 19 kg/m −2 h −1 , rejection rate: 99.92%) showed better performance in comparison to the dual-layer membrane (average flux: 15 kg/m −2 h −1 , rejection rate: 99.88%). In addition, the driving forces of TL-M (from 14.34 to 14.16 kPa) and DL-M (from 13.26 to 12.88 kPa) were calculated. Results suggested the incorporation of hydrophilic layer could increase the driving force, and largely enhance the membrane flux which could ensure the triple layer membrane possesses a good potential for DCMD application.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
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IF 9.038
Jiangya Ma,Wei Xia,Rui Zhang,Lei Ding,Yanli Kong,Huiwen Zhang,Kun Fu
In this work, modified chitosan flocculants (MCS) was synthesized by using chitosan (CS), acrylamide, cationic monomers and hydrophobic monomers via low-pressure UV-initiated copolymerization. The flocculation performance of MCS was evaluated in emulsified oily wastewater treatment. The effect of cationic and hydrophobic structure on oil removal was studied, and the interactions between these functional groups and the components in oil were also analyzed. Results suggested that MCS flocculants exhibited excellent oil removal efficiency in a wide pH range (2.0‒10). The flocculation efficiency of 91 % was achieved at the dosages of 0.6 mL/L (6 mg/L). During pH of 2.0-10, the optimal cationic and hydrophobic monomer was DMC and VT, respectively. Silane groups were favorable for oil removal than the other hydrophobic structures. The cationic groups expanded the optimal pH range of MCS in flocculation, whereas hydrophobic groups considerably reduced the dosage of MCS. The experimental results showed that alkane, cyclic aromatic hydrocarbon compounds in oil can be easily removed by using MC4, whereas cycloalkanes compounds was effectively removed by MC6 and MC7 because of preferable demulsification capacity, and the hydrophobic interaction, interfacial adsorption and electrostatic attraction played the dominant in flocculation. Thus, the synthesized MCS is favorable for emulsified oily wastewater treatment.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zixiu Chen,Xiaoyan Xu,Wei Li,Lingling Feng,Keliang Wang,Shenggang Wang,Qufu Wei,Hui Qiao
To address the limitations of current superhydrophobic materials for oil–water separation, such as the use of non-environmentally friendly raw materials, non-degradability and poor coating durability. This study presents the design of a superhydrophobic fabric that is robust, versatile, and free from fluorine. Inspired by the microstructure of lotus leaf mastoids, the zeolitic imidazolate framework nanoleaves (ZIF-L)/polymethyl methacrylate (PMMA)/polydimethylsiloxane (PDMS) superhydrophobic cotton fabric is prepared by introducing carboxyl groups onto the cotton fabric surface via a diazonium chemical method, followed by in-situ growth of crisscrossed metal–organic frameworks (MOF) structure ZIF-L, and subsequent modification with low surface energy substances PDMS. PMMA was bonded bind to the ZIF-L through hydrogen bonds and van der Waals forces, these interactions significantly improve the resistance to washing and abrasion. The ZIF-L/PMMA/PDMS superhydrophobic cotton fabric exhibits an exceptional water contact angle of 162.2° and a remarkably low sliding angle of only 5.6°. In assessments of durability, the constructed fabric displays exceptional durability, enduring 30 cycles of washing and abrasion without significant degradation of its superhydrophobic properties. It also demonstrates robust anti-fouling and self-cleaning characteristics, alongside outstanding oil–water separation efficiency of over 98 %, and a 95 % efficiency in water-in-oil emulsion separation, coupled with notable reusability. The ZIF-L/PMMA/PDMS superhydrophobic cotton fabric also exhibits superior anti-icing performance as water droplets formed an insulating air layer upon contact with the superhydrophobic surface, thereby reducing heat transfer. Its displays a low ice adhesion strength of 39 kPa at −25 °C, endured over 30 freeze–thaw cycle, and delayed ice formation for more than 120 s at −25 °C. The diminished adhesion strength as a result of the increase of air layer between the water and the superhydrophobic cotton, high surface roughness and PDMS modification, which minimizes ice adhesion.
研究领域:
材料科学
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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
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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2023
·Vol. 120
·期 27
·e2219179120
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IF 11.1
Yuanji Shi,Hongxin Mu,Jiaqian You,Chenglong Han,Huazai Cheng,Jinfeng Wang,Haidong Hu,Hongqiang Ren
The global ecological crisis of perfluoroalkyl and polyfluoroalkyl substances (PFASs) in drinking water has gradually shifted from long-chain to short-chain PFASs; however, the widespread established PFAS adsorption technology cannot cope with the impact of such hydrophilic pollutants given the inherent defects of solid–liquid mass transfer. Herein, we describe a reagent-free and low-cost strategy to reduce the energy state of short-chain PFASs in hydrophobic nanopores by employing an in situ constructed confined water structure in activated carbon (AC). Through direct (driving force) and indirect (assisted slip) effects, the confined water introduced a dual-drive mode in the confined water–encapsulated activated carbon (CW-AC) and completely eliminated the mass transfer barrier (3.27 to 5.66 kcal/mol), which caused the CW-AC to exhibit the highest adsorption capacity for various short-chain PFASs (C-F number: 3-6) among parent AC and other adsorbents reported. Meanwhile, benefiting from the chain length– and functional group–dependent confined water–binding pattern, the affinity of the CW-AC surpassed the traditional hydrophobicity dominance and shifted toward hydrophilic short-chain PFASs that easily escaped treatment. Importantly, the ability of CW-AC functionality to directly transfer to existing adsorption devices was verified, which could treat 21,000 bed volumes of environment-related high-load (~350 ng/L short-chain PFAS each) real drinking water to below the World Health Organization’s standard. Overall, our results provide a green and cost-effective in situ upgrade scheme for existing adsorption devices to address the short-chain PFAS crisis.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
BIOMACROMOLECULES
·
2023
·
IF 6.2
Yu Rao,Xiuyang Zou,Xiran Shen,Hengyuan Zhang,Shuna Gao,Jiangna Guo,Hong Chen
Antimicrobial peptide mimics have been used to kill bacteria and construct antibacterial materials. Precise design and construction of chemical structure are essential for easy access to highly effective antimicrobial peptide mimics. Herein, cationic guanidinium-based polymers (PGXs) with varying hydrophobic structures were synthesized to explore the structure and antibacterial activity relationship of antimicrobial peptide mimics and to construct antibacterial implants. The effect of the hydrophobic chemical structure, including carbon chain length and configuration, on the antimicrobial activities against both Escherichia coli and Staphylococcus aureus was investigated. The antibacterial activities of PGXs improved with increasing alkyl chain length, and PGXs with a straight-chain hydrophobic structure exhibited better bactericidal activities than those with cyclic alkane and aromatic hydrocarbon. Furthermore, PGXs grafted with poly(dimethylsiloxane) (PDMS-PGXs) showed a similar bactericidal change tendency of PGXs in solution. Additionally, the PDMS-PGXs showed potent antibiofilm performance in vitro, which can inhibit bacterial infection in vivo as subcutaneous implants. This study may propose a basis for the precise design and construction of antibacterial materials and provide a promising way of designing biomedical devices and implants with bacterial infection-combating activities.
研究领域:
材料科学
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微生物学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
GanYu Cai,Qiang-Qiang Zhu,Guojuan Wang,Zetao Shen,Yue Zhai,YuBin Kang,Le Wang
Laser-driven light possesses exceptional brightness, rendering it particularly suitable for underwater lighting (UL) and underwater wireless optical communication (UWOC). However, achieving high-brightness light remains a challenge due to significant luminescence quenching in color converters caused by heat accumulation from high-power laser excitation. This study proposes an innovative approach for utilizing laser lighting in UL and UWOC applications by directly immersing color converters in water to eliminate thermal-induced luminescence saturation. To develop color converters capable of prolonged contact with water, we significantly enhanced the water stability of Y3Al5O12:Ce phosphor-in-glass (PiG) film through Si-N co-doping and a novel waterproof structure. Due to direct contact with water, the underwater illuminance of PiG film could reach as high as 294383 lux under 34.9 W/mm² blue laser excitation, with no luminescence saturation observed. Due to the optimized phosphor stability and waterproof design, the illuminance of PiG film remained at 98.56%, 98.43%, and 98.70% of its original intensity after 50 days in clear water, hot water, and seawater, respectively. Finally, a portable underwater laser light source with a 60° divergence angle was developed in a simple transmissive excitation mode based on the PiG film. This light source could illuminate wide-area underwater environments at distances exceeding 20 m and facilitate wide-area UWOC over distances greater than 40 m. These findings pave the new way for the commercial application of laser-driven lighting devices in wide-area UL and UWOC.
研究领域:
光学材料
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水下通信
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
WEAR
·
2023
·
IF 5
Hujun Wang,Haonan Qiu,Wei Liu,Lulin Tian,Jing Zheng,Zhihui Zhang,Zhongrong Zhou
Surface texturing is a promising way to reduce wear, but further improvements in wear resistance via single textures remain challenging. Inspired by multiple biological surfaces, we design and prepare two microtextures (MTs) on AISI 440C steel by femtosecond laser and then construct superhydrophobic micro/nanostructures in the MTs to obtain two multi-bioinspired hierarchical textures (MHTs). The MHTs show significant wear resistance under relatively low loads and high frequencies. Remarkably, compared with polished surfaces, the wear rates of the dimple-shaped MHTs (DMHTs) and the groove-shaped MHTs decrease by 64.6% and 50.0%, respectively. The introduction of the superhydrophobic micro/nanostructures enables the maximum wear reduction rate of the DMHTs 121.2% higher than that of the corresponding single textures. The wear resistance of the MHTs originates from the synergetic effects (manifested by the increases in surface hardness and hydro-dynamic pressure) of the laser-ablated MTs and superhydrophobic micro/nanostructures. We envision that this work will inspire the design and fabrication of more multi-bioinspired textures to achieve further improvements in wear resistance of mechanical parts under water lubrication .
研究领域:
材料科学
·
表面工程
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2024
·
IF 24.4
Rongrong Deng,Qibo Zhang
The development of advanced electrocatalysts with exceptional performance at high current densities is pivotal for reducing electric energy consumption in industrial water splitting for hydrogen production. Herein, a flexible one-step electrodeposition approach is developed to synthesize superhydrophilic 3D flower-like clusters of Cu–Co–P nanosheets grown in situ on nickel foam (NF). Introducing Cu into Co–P causes strong electron interactions, forming an electronic configuration favorable for the adsorption and desorption of intermediates, which significantly improves the intrinsic catalytic activity. The as-deposited Cu–Co–P/NF display notable bifunctional catalytic activity with low overpotentials of 259 and 65 mV for the oxygen and hydrogen evolution reactions, respectively, at 10 mA cm −2 . Superwetting 3D flower-like nanostructures are conducive to the penetration of electrolytes and the rapid release of bubbles, enabling the efficient utilization of active sites and the timely release of bubble stress under high current densities. An assembled Cu–Co–P/NF(+, −) electrolyzer achieves an impressive voltage of 1.85 V at 500 mA cm −2 for water splitting and appreciable stability for over 220 h under simulated industrial conditions. This work offers an attractive strategy for regulating superaerophobic Co–P electrocatalysts for industrial water splitting, which can contribute to practical applications.
研究领域:
材料科学
·
电化学
·
能源转换与存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jiaxin Wang,Lili Ma,Jinmei He,Yali Yao,Xuedan Zhu,Lei Peng,Jie Yang,Kanshe Li,Mengnan Qu
The triboelectric nanogenerator (TENG) is a promising renewable energy conversion technology for harvesting various low-frequency mechanical motions in nature, such as human motion and raindrops. However, traditional TENGs still suffer from challenges including poor mechanical stability, low environmental adaptability, and single working mode. Herein, a scalable and flexible hybrid dielectric-based TENG (HD-TENG) based on triboelectric layer with internal micro/nano pores and hierarchical superhydrophobic micro-cilia structure has been developed and designed to effectively harvest energy from various human motions as well as natural environment (raindrops and waves). Working in the single-electrode mode, the HD-TENG demonstrates high output (∼465 V, ∼60 μA, ∼3.2 W m −2 ) and maintains a stable signal output under various deformations, vigorous washing, and high humidity environment. Furthermore, two liquid–solid generators are designed to separately harvest droplet energy and wave energy by bulk effect between placed top electrode and the developed HD-TENG. As a result, the output performance of the generators has been significantly improved through further parameter optimization, and peak power densities reach 215 mW m −2 and 1.3 W m −2 , respectively. Due to the strong adaptability and simple fabrication, the versatile HD-TENG can serve as self-powered devices with energy harvested from various sources in different application scenarios.
研究领域:
材料科学
·
能源技术
·
纳米科技
✓ 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）