Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Jinwei Xue,Pinyi Dai,Yiqian Liu,Hao Lu,Qiang Yang
The development of an efficient and sustainable separation method for oily wastewater has become a major challenge for industrial development and environmental protection. In this work, the simple special wettability particle preparation method and the hybrid filters construction strategy was reported for enhanced oil/water separation efficiency. Two special wettability quartz sands mixed in a certain proportion could destroy the balance of dispersed droplets in the oil-water emulsion, induce the coalescence of dispersed droplets, and purify the oil-water emulsion by the tortuous channel in the filter. Based on the coupling effect of “size sieving” and “coalescence separation”, the special wettability particle hybrid filter with a mass ratio of 3:1 had good droplet coalescence ability, and the separation efficiency of various kinds of oil-water emulsions can reached more than 98%. The hybrid filters exhibited robust mechanical and chemical stability, excellent durability, which enable them to be competent for oil/water separation in multitasking and complex environment.
研究领域:
环境科学
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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
·
2025
·
IF 9
Asad Sharif,Hammad Saulat,Peng Wan,Jianhua Yang,Lu Jinming
M-gallate (M = Ni, Co) coated stainless steel meshes (SSMs) were fabricated through a cost-effective and environmentally friendly synthesis approach of electrodeposition for a sustainable solution of oil/water separation. The M-gallate/500-mesh, synthesized in just 120 s, exhibit super hydrophilic properties owing to the rich hydroxyl groups (–OH) inherent in their metal–organic framework (MOF) structure which significantly enhance their performance in oil/water separation. The nano-sized randomly oriented crystals growth of Co-gallate/500-mesh showed the excellent separation performance with a water flux of 93.3 ± 5.2 × 10 3 Lm −2 h −1 and separation efficiency of 99.8 ± 0.1 % while Ni-gallate/500-mesh exhibit a water flux of 71.5 ± 5.9 × 10 3 Lm −2 h −1 and separation efficiency of 99.6 ± 0.2 % for the separation of light oil toluene/water mixture. To assess practical applicability, the M-gallate/500-mesh were tested for seawater/oil mixtures. Notably, the separation efficiency remained above 99 % for both Ni-gallate/500-mesh and Co-gallate/500-mesh while the seawater flux slightly increased for Ni-gallate/500-mesh. Moreover, M-gallate/500-mesh demonstrated good separation performance and chemical stability under alkaline conditions coupled with rapid and facile synthesis, indicating their potential for practical oil/water separation.
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
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yihai Zhou,Pin Song,Meng Pan,Hong Wang,Zhongying Liu,Jun Di,Daobin Liu,Jingxiang Low,Renchun Yang
Photocatalytic H 2 evolution from water splitting in liquid–solid two-phase requires an efficient photocatalyst with excellent ability of charge separation and reactant molecular diffusion. In this study, the super hydrophilic-electrons acceptor with abundant –C=O and –OH functional groups were evenly grafted onto rutile TiO 2 nanorods surface to speed up the charge separation and water molecular diffusion, respectively. The photocatalytic results showed that the TiO 2 -CA grafted by citric acid (with three –C=O, three carboxy-(–OH) and one alcohol-(–OH)) presented a 1.48° contact angle and a distinct increased H 2 -production activity (48.5 mmol·h −1 ·g −1 ), whereas the TiO 2 -PA grafted by propane-1,2,3-tricarboxylic acid (Just lack of one alcohol-(–OH) compared with TiO 2 -CA) showed a 30.95° contact angle and a decreased H 2 -production activity (19.3 mmol·h −1 ·g −1 ) compared to the unmodified TiO 2 (25.8 mmol·h −1 ·g −1 ), indicating that the super hydrophilic-electrons acceptor is vitally important to the photocatalytic activity of TiO 2 . Based on the present results, the carbonyl group (–C=O) possess a stronger reducing capability and act as “electrons acceptor”, while the only alcohol-hydroxyl group (–OH) in TiO 2 -CA can decrease the mass transfer resistance and serve as “super hydrophilic absorber”. Considering its mild preparation, inexpensive cost, and admirable efficiency, the super hydrophilic-electrons acceptor with dual functional groups regulated TiO 2 can become a promising way for potential application in photocatalytic field.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2018
·
IF 3.789
Bang Liang,Guangyu Zhang,Zhenxing Zhong,Yan Huang,Zhaohui Su
In this work, an anti-icing coating based on superhydrophilic polyzwitterion brushes is reported. Poly(sulfobetaine methacrylate) (PSBMA) brushes were synthesized by surface-initiated atom-transferred radical polymerization to create superhydrophilic films on silicon wafers. The thickness of the PSBMA brushes film increased linearly with the polymerization time, and the film remained superhydrophilic in a nonassociated state when the thickness was less than ∼100 nm. DSC and FTIR analyses revealed that PSBMA contains more nonfreezable bound water than typical polyelectrolytes such as poly(sodium styrenesulfonate) and poly(2-(methacryloyloxy)ethyltrimethylammonium chloride), leading to lower ice adhesion strength than the latter two. At −20 °C, the PSBMA brushes coating demonstrated low ice adhesion strength of 60 kPa, showing a significant reduction in ice adhesion by up to ∼75% compared to uncoated silicon wafer. The optimum PSBMA layer thickness for low ice adhesion was ∼100 nm. These findings suggest that polyzwitterions are excellent candidates for anti-icing coating application.
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
Chemical Engineering and Processing-Process Intensification
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2020
·
IF 3.731
Xin Gao,Sida Zhao,Haifeng Cong,Peng Yan,Xingang Li,Chengjian Xiao,Hong Li
Water distillation is proved to be an effective method for the recovery of tritium from nuclear power plant drainage. In addition to the geometry and material, the surface wettability of the internals also affects the mass transfer performance of the packings. In this paper, we prepared a superhydrophilic coating on the surface of copper packings by a simple method, to increase the intensity of gas-liquid interface, and thus intensifying the heterogeneous mass transfer process. Scanning electron microscopy, atomic force microscopy, X-ray diffraction and X-ray photoelectron spectroscopy were employed to study the physical and chemical condition changes of the packings surface. Measured by ultraviolet fluorescence imaging technology, the wetted area of the copper wire mesh corrugated packing increased by 58.0 % ∼ 91.2 %. The mass transfer performance for separating H 2 O-HTO mixture with tritium activity of 12.9 MBq/kg is conducted in the total reflux mode distillation column. With varied measured conditions, the height equivalent of theoretical plate (HETP) drops from 3.5 ∼ 5.8 cm to 1.9 ∼ 2.4 cm after the packing surface modification, which indicates that the mass transfer performance has been sufficiently improved.
研究领域:
核化学与化工
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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
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
·
IF 5.774
Qingwu Long,Jiexin Chen,Zhu Wang,Zhe Zhang,Guangxian Qi,Zhao-Qing Liu
Oil fouling is a major obstacle for the efficient and reliable oil-water separation of mesh-based membrane processes. Innovations in membrane materials and preparation processes are therefore needed to develop anti-oil-adhesion strategies. This study reports a series of vein-supported porous membranes (VPMs) fabricated by casting polyacrylonitrile (PAN) on veins through non-solvent induced phase separation, confirmed by FTIR, SEM and XRD characterizations, and applied as an effective oil-water separation membrane. Benefiting from the combination of tubular-like vein and hydrophilic PAN, the resultant VPM demonstrates a fine-tunable morphology and superhydrophilicity, extremely boosting underwater superoleophobicty, mechanical strength and superior performance for oil/water separation to various oily mixtures/emulsions, showing underwater oil contact angles over 157° and nearly zero underwater oil adhesion. In oil-water mixture separation process, a separation efficiency of > 99% and ultrahigh permeation flux of 9592 LMH can be achieved under gravity conditions using VPM-2 (casting with 2 wt% PAN). For oil-water emulsion separation, a highest flux of 3011 LMH and trace oil concentration <10 ppm in the filtrate was generated using VPM-9 (casting with 9 wt% PAN) under a low external pressure of 3 kPa. The VPM-2 membrane is further carried out a 40-h cycling separation, showing a constantly stable water flux of ~6000 LMH. The developed VPMs open a bright path to use biomaterials for design and fabrication of novel oil-water separation membrane.
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
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yirong Xiao,Dongxue Guo,Tong Li,Qingfeng Zhou,Liguo Shen,Renjie Li,Yanchao Xu,Hongjun Lin
Co-deposition between plant polyphenol tannic acid (TA) and Fe 3+ has been reported to be a facile way to construct nanofiltration (NF) membranes. However, this strategy suffers the problems of low atom economy and generating a large amount of environment-harmful aggregate wastes in solution. This work proposed a novel method based on layer-by-layer (LBL) self-assembly for preparation of TA-Fe 3+ complex based NF membrane. The proposed method was facile and environmental-friendly because it did not require any chemical or solvent involved pretreatment nor generated any aggregate waste. A series of characterizations proved the successful formation of TA-Fe 3+ complex based top layer on polyacrylonitrile (PAN) support surface. The resultant membrane showed superhydrophilicity property with water contact angle as low as 8°. Meanwhile, the optimized membrane showed a high water permeance of 40.9 L m −2 h −1 bar −1 whilst simultaneously maintained rejections higher than 93.9% towards various dyes with the molecular weight (MW) ranging from 320 to 1017 Da. Moreover, the as-prepared NF membranes showed stable long-term separation performance and good ion/organic selective separation performance. This study not only proposed a facile fabrication process for TA-Fe 3+ complex based NF membrane, but also provided great potentials for sustainable molecular separation by the prepared membranes.
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
MATERIALS LETTERS
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2021
·
IF 3.423
Chenggang Chen,Lisha Pan,Hai Li,Qingqing Liu,Fei Li,Jinchun Tu,Aiwu Ding,Kexi Zhang
Carbon-high fly ash (CFA) is a reused solid waste. We herein report a simple method to fabricate superhydrophobic CFA. Superhydrophobicity was achieved by decorating ZnO nanoplates and grafting stearic acid (SA). SEM results showed that the micro–nano was established, wherein ZnO nanoplates grew successfully with ∼10 nm thickness on the CFA surface forming a honeycomb structure. FT-IR results showed that the carboxylic acid of SA reacted with surface hydroxyl of ZnO and CFA by esterification. After modification by SA in the best conditions, the water contact angle of CFA-ZnO-SA reached to 156.2° with the petal effect. The material could be an excellent candidate for hydrophobic application.
研究领域:
材料科学
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 31
·15057-15063
·
IF 9.931
Yunlu Pan,Suichu Huang,Feiran Li,Xuezeng Zhao,Weijie Wang
The coexistence of superhydrophilicity and superoleophobicity was considered abnormal since a superoleophobic surface would also be superhydrophobic based on the classic surface free energy (SFE) theory. However, several studies have succeeded in preparing uperhydrophilic/superoleophobic surfaces, although the theoretical explanations were still not convincing due to the lack of experimental evidence. In this study, a theory for the coexistence of superhydrophilicity and superoleophobicity was developed with a series of experimental proofs. Four different superhydrophilic/superoleophobic surfaces were prepared as examples and it can be inferred that much more different surfaces with such wettability can be prepared for different specific applications based on the developed theory, and oil/water separations were conducted by using one kind of these prepared surfaces.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Wei Jiang,Hongyan Fu,Lilin Yang,Wen Tian,Houfang Lu,Bin Liang
In this research, a simple strategy to prepare superwetted solid particles based on particle size adjustment is proposed. Typical samples, including Ag 2 O, AgCl, AgBr, Cu 2 O, Cu(OH) 2 , and soot, with different superwettabilities were obtained based on this size-dependent strategy. The acquired superwetted samples without any modification, whether superhydrophilic and superhydrophobic , had the same composition and structure, and their wettability was only decided by the particle size. This size-dependent strategy for preparing superwetted solid particles is universal and promising.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Weihua Meng,Pan Li,Yanrong Lan,Xiaomeng Shi,Shan Peng,Hongqiang Qu,Jianzhong Xu
Taking advantages of strong chelation capability, fire-resistance, and highly hydrophilicity of phytic acid (PA), we designed and further fabricated PA-Sn@Mg(OH) 2 (PA-Sn@MH) compounds to improve fire-resistance of MH. Multifunctional coatings consisted of PA-Sn@MH, TiO 2 and waterborne polyurethane (PU) were proved to show instant superhydrophilicity when coated onto various substrates, which also showed superior underwater superoleophobicity under diverse conditions, repeated photocatalysis capability, and fire-resistance. The coated stainless steel (SS) mesh presented excellent and stable superoleophobicity under water and other corrosive/harsh conditions. Therefore, the coated mesh could successfully and quickly separate a series of oil-water mixtures. It owned superior stability that also could separate oil-corrosive liquids (include HCl, NaOH solutions, and even strong corrosive liquid of aqua regia)/NaCl/very hot water mixtures. The intrusion pressure that the surface maximally supported was around 2.3 kPa, and the water flux was as high as 62 L m −2 s −1 . Moreover, the coatings could effectively and recycled photodegrade diverse oil and organic dyes, while still maintained its instant superhydrophilicity and superior underwater superoleophobicity, which successfully solved the easy oil-fouling problem of the superhydrophilic surfaces. When the coatings were deposited onto some inflammable substrates such as fabric, sponge, and paper, the coatings could endow them self-quenched flame-resistance. This paper reported an environmentally friendly, low-cost method to fabricate multifunctional coatings that showed very promising application potentials in oil-water separation, photocatalysis, and flame-retardant fields.
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
Progress in Natural Science-Materials International
·
2015
·
IF 1.873
Chao Yang,Chengyi Song,Wen Shang,Peng Tao,Tao Deng
In this work we report the facile fabrication and performance evaluation of flexible heat pipes that have integrated bioinspired wick structures and flexible polyurethane polymer connector design between the copper condenser and evaporator. Inside the heat pipe, a bioinspired superhydrophilic strong-base-oxidized copper mesh with multi-scale micro/nano-structures was used as the wicking material and deionized water was selected as working fluid. Thermal resistances of the fabricated flexible heat pipes charged with different filling ratios were measured under thermal power inputs ranging from 2 W to 12 W while the device was bent at different angles. The fabricated heat pipes with a 30% filling ratio demonstrated a low thermal resistance less than 0.01 K/W. Compared with the vertically oriented straight heat pipes, bending from 30° up to 120° has negligible influence on the heat-transfer performance. Furthermore, repeated heating tests indicated that the fabricated flexible heat pipes have consistent and reliable heat-transfer performance, thus would have important applications for advanced thermal management in three dimensional and flexible electronic devices.
研究领域:
材料科学
·
热能工程
·
仿生学
✓ 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）