NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 30
·14289-14296
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IF 3.3
Xin-Xin Chen,Yu-Ping Zhang,Hong-Li Du,Li Wan,Cheng-Gang Zuo,Ling-Bo Qu
Membrane separation is a very promising and economical method for gravitational oil/water separation and the collection of oil spills. Both superhydrophilicity/underwater superhydrophobicity (SHL&UWSOB) and superhydrophobicity/superlipophilicity (SHB&SOL) are suitable materials for the solution. In this work, an ingenious design strategy of “two birds with one stone” to modify Ni foams (NFs) was developed, in which SHL&UWSOB was initially fabricated by the in situ growth of a bimetallic Fe/Ni-MOF on an NF surface by solvothermal synthesis. Further modification based on the resultant SHL&UWSOB-NF led to the construction of a SHB&SOL surface by simple immersion of stearic acid. The micro/nano structure beneficial to underwater superoleophobicity was tailored by optimizing the solvothermal reaction time in the range of 10–24 h. The results showed that SHL&UWSOB-NF was obtained with a high oil contact angle (OCA) of 165.9° under water when the time of the solvothermal reaction was kept at about 18 h. Likewise, the further modified NF exhibited an obvious SHB&SOL property with a water contact angle (WCA) of 156.3° and a water rolling angle (SCA) of 9°. The light oil (n-hexane) floating on the water's surface and heavy oil of carbon tetrachloride (CCl4) at the bottom of the water, as well as the mini-separation of oil/water, demonstrated its facile and versatile application as a separation medium. The strategy may offer new approaches for the fabrication of superwetting/superantiwetting separation materials for oil/water separation and oil collection.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2024
·
IF 3.7
Xiujun Wang,Jian Zhang,Qian Xu,Ming Duan,Chunsheng Zhang,Shenwen Fang
In this work, the empirical relationship among three apparent parameters in the hydrophilic–lipophilic deviation (HLD) equation was studied to provide help in using the HLD equation to design a block polyether water clarifier for treating produced water in an oilfield. Ten block polyethers (including six linear polyethers and four branched polyethers) were prepared, and their HLD equations were measured. By curve fitting, the empirical relationship among apparent hydrophobicity characteristic (K), apparent characteristic curvature (Ccn), and apparent temperature coefficient (ct) of block polyether were obtained: K = 9.32ct, Ccn = 18e–24.5K (for linear polyether), and Ccn = 3.7e–20.8K (for branched polyether). By introducing these relationships into the HLD equation and combining an empirical relationship between propylene oxide/ethylene oxide (mole ratio) in a block polyether and K/Ccn, a new block polyether was designed to treat the produced water. The treatment result confirmed the reliability of these empirical relationships. The results expand the practical application of HLD theory and are useful for the development of a block polyether water clarifier.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Zeming Gu,Jun Qian,Ran Wang,Meilin Lv,Xiaoxiang Xu,Chun Luo
Layered Aurivillius compound Bi 5 Ti 3 CrO 15 has been synthesized by a hydrothermal method for the application as a photocatalyst to liberate hydrogen from water. Bi 5 Ti 3 CrO 15 owns a narrow band gap ( E g ~2.46 eV) and shows stable photocatalytic activity under both full range ( λ ≥250 nm) and visible light illumination ( λ ≥420 nm). A short hydrothermal reaction time is critical to achieve high photocatalytic activity as defects such as Cr 6+ and Bi 5+ can be avoided. An AQE as high as 3.66% at 420 nm ± 20 nm has been recorded, warranting promising application in the field of solar energy conversions. DFT calculation reveals the important role of Cr 3+ cations for visible light sensitivity of Bi 5 Ti 3 CrO 15 .
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE ENGINEERING
·
2023
·
IF 2.8
Hao Liu,Yuelan Di,Haidou Wang,Yuncai Zhao
Metal components in microelectromechanical systems are prone to failure and corrosion due to droplet adhesion in wet environments. Several multi-level structures on the micro-nano scale may induce effective superhydrophobicity to prevent such adhesion. This study proposes a hybrid manufacturing process to generate ‘frame-cone’ textures on the surfaces of metals by combining ultra-fast laser etching and electrodeposition. Periodically distributed frame recesses and pits were coated with nano-submicron Ni coatings with conical shapes, and the pit depth and cone height were controlled by tuning the laser scanning time and current density, respectively. The surface adhesion force was reduced to 22.8 μN, and the static contact angle was maintained at 156.7° using the hybrid process, while the adhesion forces of laser etched samples with the same depth were 164.7 μN. The multi-level ‘frame-cone’ structure stored more air and reduced the contact areas between the bottoms of the pits and droplets. The hybrid process of ultra-fast laser etching and electrodeposition aided in improving the superhydrophobicity, with less damage to the substrate.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Tian Lan,Jimin Xu,Chengjie Wang,Yiran Wang,Xiangyang Liu,Maogang He
The advantages of deep eutectic solvent (DES), such as non-toxic, non-flammable, low vapor pressure and low cost, make it a green solvent for capturing carbon dioxide. Adding water can change the nanostructures of DES and thus significantly influent the physical and chemical properties. At present, most researches focus on the theoretical study while few experimental studies on the effect of water on the thermal conductivity of DES. In this paper, the 3ω experimental system was improved using a two-wire structure to eliminate the end effect and measured the thermal conductivities of the DES composed of choline chloride and ethylene glycol and its aqueous solution to study the effect of water on the thermal conductivities. The uncertainty of thermal conductivity is less than 4%. The second-order Scheffé polynomial was modified to make it more suitable for fitting the thermal conductivities of the mixtures containing DES. The average absolute relative deviation calculated by the equation is 2.16%, which corroborates the high accuracy of the improved equation.
研究领域:
物理化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Hang Xu,Qian Zhang,Ninghui Song,Jiapei Chen,Mingmei Ding,Caihua Mei,Yongchen Zong,Xiangyu Chen,Li Gao
Membrane distillation (MD) is a promising membrane process with nearly 100% salt rejection, which can can realize freshwater recovery and reuse. However, wetting and low permeate flux are major concern for the hydrophobic microporous membrane during MD operation. To address this concern, a simple and effective method to fabricate anti-wetting and high permeate flux Janus-enhanced membranes with double-sided spraying was developed. The spraying materials on both sides of the polytetrafluoroethylene (PTFE) membrane were prepared by crosslinking reactions. Sulfosuccinic acid (SSA) crosslinked MXene was used in the permeate side to construct hydrophilic nanochannels, consequently improving the permeate flux. Methyltriethoxysilane (MTES) crosslinked polydimethylsiloxanes (PDMS) was used in the feed side to reduce surface energy and enhance the anti-wetting ability of the membrane. The optimal water contact angles for the feed and permeate side were 135° and 71.8°, respectively. During direct contact membrane distillation (DCMD) experiments of seawater desalination, Janus-enhanced membrane proved to be stable after 60 h with an average permeate flux as high as 33.5 kg/(m 2 ·h). Therefore, this study provided a novel insight on preparing a MD membrane with simultaneous enhanced permeability and wetting resistance for freshwater recovery.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Helong Zhang,Chuxiong Qiu,Rong Zhang,Hao Zhang,Yunxia Chen,Tao Zeng,Fen Qiao,Lee Li,Ghafar Ali,Xiujian Zhao,Yi Xie
We develop layered MAX (e.g., Ti 3 AlC 2 , Ti 3 AlCN, Ti 2 AlC, Ti 2 AlN) into novel photothermal silica-deposited MAX (MAX@SiO 2 ) composites and coatings for efficient seawater desalination and anti-/de-icing, by combining their strong optical absorbance capacity covering UV-Vis-NIR regions with unique surface wettability. The water evaporator with a unique gradient superhydrophilicity-hydrophilicity-hydrophobicity-superhydrophobicity is achieved by incorporating the as-synthesized hydroxyl- and methyl-modified MAX@SiO 2 composites into porous melamine foam (MF). By combining the unique gradient wettability with porous structure and strong optical absorbance, the proposed MAX@SiO 2 evaporator displays excellent seawater desalination performance with high water evaporation rates of ∼2.19 and 3.45 kg m −2 h −1 under 1.0 and 2.0 sun irradiation, respectively. The photothermal water evaporation efficiency can reach to 91.2 % under 1.0 sun illumination. Besides, by sequential spray-depositing resin-based primer and MAX@SiO 2 top-coat on glass slides and insulators, the as-achieved superhydrophobic (SH) photothermal coatings displayed excellent anti-icing and de-icing performances. The procedures described here enable a convenient and novel strategy to develop micro-nanocomposites and multifunctional coatings with strong photothermal conversion ability, which would shed light on promising potentials in energy conversion and photo-thermal applications including solar freshwater generation, sewage purification, and anti-/de-icing.
研究领域:
材料科学
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环境工程
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能源转换
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光热应用
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Weisan Hua,Miaomiao Jiang,Xuelai Zhang,Qiang Sun,Wenzhuang Zhang
Calcium chloride hexahydrate (CCH) has a large latent heat of phase change, a high heat storage capacity and a relatively low cost, which makes it suitable for use in combination with the construction field. However, it has the problem of large supercooling, which limits its development and application. Studying the crystalline growth properties of calcium chloride hexahydrate is essential to comprehending or suppressing supercooling because the degree of supercooling is determined mainly by the room temperature(5–10 °C) melt structure of CCH and the structural factors that drive its supercooling behavior. Using a combination of macroscopic and microscopic research techniques, we explored the two features of the self-crystallization growth behavior of CCH at various initial concentrations and the crystallization growth behavior driven by the external addition of crystal nuclei were explored. The results showed that the water molecule content affects not only the product type but also the growth, development, and regrowth of crystals and crystal morphology. The observation of the triggered crystallization process under different nucleation types showed that the nucleation type affected the crystal growth, and SrCl 2 ·6H 2 O, which had a similar molecular structure, could replace the nucleation of CCH itself and accelerate the crystal growth process. At the same time, NaCl was more difficult to nucleate and inhibited crystal growth. To better understand subcooling and its inhibition, this paper examined the crystallization formation characteristics of CCH at various concentrations, compares and contrasts its crystallization characteristics under various nucleating agents as the triggering nuclei, and investigated the intrinsic mechanism of the nucleus type on its crystallization growth.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ming-Long Wang,Yi-Fei Sun,Hong-Nan Chen,Jin-Rong Zhong,Liang-Liang Ren,Ming Wang,Dan Rao,Yong-Quan Liu,Yi-Bo Hao,Bei Liu,Chang-Yu Sun,Guang-Jin Chen
Hydrate-based CO 2 storage is a highly promising technology for long-term stable CO 2 storage in sediments. However, the unclear displacement and hydration mechanisms, along with the low conversion rate of CO 2 hydrates, have hindered the field application. Here, we report a method of the injection of CO 2 /water emulsion to replace liquid CO 2 to regulate the ratio of CO 2 to water in the sediment pores and to enhance their contact ability, which can significantly improve the CO 2 hydrate conversion rate. Compared to liquid CO 2 injection, emulsion injection can flow through more sediment pores with an increase in displacement efficiency by 45 %-62 %, which leaves a CO 2 -to-water ratio within the pores that is more suitable for hydrate formation, ultimately tripling the hydrate conversion rate. We have outlined the hydrate growth mechanisms for both injection forms, where the micron-sized CO 2 droplets within the emulsion can greatly reduce the barrier effect of hydrate film. Under the combined influences, the CO 2 storage density in hydrates up to 91.2 kg/m 3 for CO 2 /water emulsion injection is 47.8 % higher than that of 61.7 kg/m 3 for liquid CO 2 injection. Our work provides a new approach to high conversion CO 2 hydrate sequestration in submarine sediments.
研究领域:
环境科学
·
地质学
✓ 已验证
产品关联
DOI
高影响因子
WEAR
·
2021
·
IF 3.892
Zheng Zhang,Yanbao Guo,Fei Han,Deguo Wang,Siwei Zhang
Two dimensional (2d) lubricant materials further explore their application in oil and gas field with the research direction of reducing friction and wear. In this study, we added multilayer graphene into water-based sand cleaning liquid to reduce friction and wear of the CT80 coiled tubing . The results showed that the addition of multilayer graphene significantly improved the anti-friction and wear resistance. Adding 0.5% multilayer graphene effectively reduced COF and wear by 75%. Additionally, the higher multilayer graphene concentration, the greater CT80 material withstood the load of severe wear. Multilayer graphene can be adsorbed on the wear debris or form a lubrication film on both worn surfaces, which facilitated the transportation of the debris. Moreover, the wear analysis indicated the main wear form of the CT80 material was abrasive wear and fatigue wear.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Wenxia Sima,Kaisen Fan,Potao Sun,Tao Yuan,Ming Yang,Zhaoping Li,Fengqi Liu,Yao Yuan
Repairing the micro-scale damage of insulating materials under a strong electric field has long been a highly desired but challenging task. Among all kinds of damage, water tree damage in the insulating materials of electrical equipment and electronic devices working in humid environments has long been considered irreparable. The main challenge is that residual water prevents the healing agent from filling the water tree branch channel. To solve this problem, this work reports a magnetically targeted, water-triggered, self-healing microcapsule (MTWTSH-MC) that makes a breakthrough against water tree damage based on microfluidic techniques. Targeted microcapsules driven by a directional magnetic field are concentrated to the vulnerable area of the insulating materials, exerting very limited effects on the dielectric. When damage breaks the microcapsules, the healing agent releases and quickly fills the damage channel and then reacts with water in the air or in the branch channel of the water tree, achieving solidification of the healing agent and self-healing of the damage channels. In this way, we can realize self-perception, self-triggering, and self-healing for both mechanical damage and water tree damage in insulation materials without any external stimulation.
研究领域:
材料科学
·
电气工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Nanomaterials
·
2015
·
IF 1.644
Qiufang Yao,Chunde Jin,Huanhuan Zheng,Zhongqing Ma,Qingfeng Sun
Magnetic NiFe2O4 nanoparticles were successfully deposited on the wood surface via a hydrothermal process at 70°C. The surface of the as-prepared magnetic NiFe2O4/wood hybrids (MWHs) was covered by spherical-like NiFe2O4 particles with an average size of 50 nm. MWH exhibited the thermostability, microwave absorbability, and superparamagnetism with saturation magnetization () of 1.79 emu·g−1. With further modification by 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (FAS-17), MWH expressed superhydrophobic performances with a water contact angle of 158°. Its superparamagnetism stably remained under harsh conditions after chemical solutions corrosion and physical frozen test.
研究领域:
材料科学
·
纳米技术
✓ 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）