Journal of Cleaner Production
·
2023
·
IF 11.1
Yaopeng Zhang,Miaojia Du,Hui Chen,Chensi Shen,Mengmeng Lou,Chenye Xu,Chunyan Ma,Fang Li
Adsorption enrichment coupled with oxidative degradation is a promising technique for eliminating tetracycline (TC) from an aqueous environment . However, the high cost associated with this technique limits its applicability. Thus, in this study, we synthesized Cu 2 O and CuFe 2 O 4 bimetallic-modified chitosan particles (Cu(I)–CuFe 2 O 4 @CS) with high adsorption efficiency and self-cleaning performance. The self-cleaning performance was driven by the in-situ generated reactive oxygen species (ROS). Batch experiments and characterization methods indicated that 97.39% of TC was rapidly adsorbed on the particles surface and subsequently degraded by in-situ generated ROS, to achieve a self-cleaning process. The Cu(I)–CuFe 2 O 4 @CS/TC system exhibited maximum O 2 • - and H 2 O 2 concentration of 12.95 μmol/L and 42.05 μmol/L, respectively. Cu 2 O was the main source of the ROS generation, while CuFe 2 O 4 effectively adsorbed TC and contributed to the synergistic accumulation of ROS. Moreover, the adsorbed TC with reductive functional properties facilitated the reduction of Fe(III)/Fe(II) and Cu(II)/Cu(I) cycles, thereby improving TC elimination efficiency.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Xiang Liu,Tian C. Zhang,Huaqiang He,Like Ouyang,Shaojun Yuan
Corrosion is one of the most challenging issues for the large-scale application of magnesium alloys . Fabricating a superhydrophobic surface with a low-cost, easy-to-handle method is meaningful for anti-corrosion protection of Mg alloys. In this study, a stearic acid/CeO 2 bilayer coating was prepared on AZ31B Mg by a simple electrodeposition method combined with immersion in stearic acid solution. The growth traits of the coating with different electrodeposition current densities and time were evaluated, which demonstrated that 60 min combined with 0.65 mA/cm 2 is the optimal electrodeposition condition. Besides, the wettability , anti-corrosion ability, durability, chemical stability and self-cleaning properties of the coating were comprehensively investigated. The results showed that the as-prepared coating exhibited a good superhydrophobic and self-cleaning property with CA>158° and SA<2°. Moreover, the coating demonstrated an improved anti-corrosion performance in 3.5 wt% NaCl solution and was quite stable in the atmosphere and in contact with pH droplets of 1–13.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Yuxin Song,Jihui Lang,Jiale Guo,Qi Zhang,Qiang Han,Hougang Fan,Ming Gao,Maobin Wei,Jinghai Yang,Zifeng Sheng
A carbon cloth@TiO 2 @Ag (CC@TiO 2 @Ag) membrane has been prepared by two-step method, including the hydrothermal method to make TiO 2 grow on carbon cloth and the photodeposition method to synthesize Ag element on CC@TiO 2 for oil-water separation. The obtained CC@TiO 2 @Ag membrane shows the good superhydrophilicity and underwater superoleophobicity due to its hierarchical broccoli-like interface with the good surface roughness and the natural hydrophilicity of TiO 2 . Importantly, the resultant membrane exhibits a strong self-cleaning ability under visible light irradiation of CC@TiO 2 @Ag membrane with loading a certain amount of Ag, so that the separation efficiency remains above 99% even after 60 cycles for various oil-water mixtures. Moreover, the CC@TiO 2 @Ag membrane is flexible and durable. The high separation efficiency and excellent self-cleaning ability of the membrane may own the broad application prospects in the field of oil-water separation.
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
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Hongming Fu,Zhaohao Li,Yuntao Zhang,Heng Zhang,Haiping Chen
With the increasing demand for environmental protection, the recovery and reuse of fly ash has attracted more and more attention. In this paper, the fly ash based porous ceramic membrane is modified from hydrophilic to superhydrophobic successfully. Average contact angle and roll-off angle of the modified superhydrophobic fly ash based ceramic membrane are 151.3° and 11.3°, respectively. Additionally, a variety of performances of the prepared superhydrophobic fly ash based ceramic membrane are characterized. Dynamic process of droplets with different initial velocities impacting on the surface of superhydrophobic fly ash based ceramic membrane is photographed by high-speed camera. It is proved that dynamic process of droplet impacting on superhydrophobic surface includes spreading, retraction and partial rebound. Spreading, retraction and solid-liquid contact time of droplets are about 2.9 ms, 11.5 ms and 14.4 ms, respectively. The above data is almost unaffected by impact velocity of droplets. In addition, experiments show that the prepared superhydrophobic fly ash based ceramic membrane has good acid and alkali corrosion resistance , and self-cleaning performance. In this paper, superhydrophobic ceramic membrane prepared by fly ash shows excellent performance and it can provide guidance for the reuse of fly ash.
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
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
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IF 9.879
Chao-Hua Xue,Ren-Xuan Wei,Xiao-Jing Guo,Bing-Ying Liu,Mi-Mi Du,Meng-Chen Huang,Hui-Gui Li,Shun-Tian Jia
Daytime radiative cooling that cools down an object by reflecting solar light and radiating heat simultaneously is expected to be a promising technology for dissipating heat without any energy consumption. However, radiative cooling materials’ solar reflection and infrared emissivity will be affected by the rain or dust pollution, therefore reducing the cooling performance under outdoor environments. A superhydrophobic radiative cooling composite film with hydrophobic SiO 2 embedded in poly(vinylidene fluoride-co-hexafluoropropene) was proposed via phase separation technology. The SiO 2 particles not only imparted to the film porous micro-nano tier rough structure to enhance the surface hydrophobicity , but also improved the mid-infrared emissivity of the film. As a consequence, the as-prepared film achieved 10.3 °C cooling under direct sunlight with convective heat reduced by transparent polyethylene film, and excellent superhydrophobicity with water contact angle greater than 160° and sliding angle close to 0°. Moreover, the cooling performance and superhydrophobicity of the film changed little after immersion in different pH solution and long-time exposure to UV irradiation. Importantly, the obtained film demonstrated great self-cleaning property making it hardly to be contaminated in outdoor environments, which is significant for sustainable applications.
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
Materials Research Express
·
2020
·Vol. 7
·期 2
·026407
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IF 1.929
Dashuai Zhang,Yan Zhang,Xiaopeng Zhang,Chen Li,Lili Wang,Tianyi Shun,Hongting Wu,Qiang Lin,Zaifeng Shi
In this study, novel physical blending modified membranes are prepared using the non-solvent induced phase separation method, the influences of nano-graphite and Poly(vinyl chloride) (PVC) incorporated into the hydrophobic performance of the polyvinylidene fluoride (PVDF) membrane were investigated. The composite membrane was prepared not only reduces the cost of producing PVDF membrane, but also enhances the hydrophobicity of the membrane. The addition of nano graphite and PVC accelerated the phase transformation of PVDF and changed the crystal structure of PVDF. Therefore, the surface roughness of the composite membrane is changed, and the hydrophobicity of the composite membrane is enhanced compared with the original PVDF membrane. the crystal structure and crystallinity of the composite membranes can be analyzed by WAXD and DSC, the surfaces morphology of the composite membranes were characterized by SEM and AFM, the wetting and hydrophobicity of the composite membrane by CA and SFE. The experimental results show that adding a small amount of nano inorganic substance (nano graphite) to the (PVDF-PVC) blend polymer is an effective method to prepare and improve the hydrophobic performance of the blend polymer membrane. The PVDF-PVC/nano-graphite prepared in the experiment not only improves the hydrophobic performance of the PVDF membrane, but also reduces the cost of the composite membrane through the addition of PVC. Meanwhile, the membrane has a durable self-cleaning performance, which widens the applications of PVDF membranes.
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
JOURNAL OF MEMBRANE SCIENCE
·
2024
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IF 8.4
Weiguo Kong,Longfei Zhang,Na Yang,Bin Jiang,Luhong Zhang,Yong Liu
Rational design of hydrophilic hierarchical structures on the membrane surface is a promising method to improve oil/water separation efficiency. However, oil droplets with intrinsic adhesion tend to accumulate on the membrane surface, which deteriorates membrane performance. In this study, tannic acid-Zn(II) complex was homogeneously anchored on the PVDF membrane surface and further in situ converted to ZIF-8 in the presence of 2-methylimidazole. Subsequently, Cu ion exchange was employed to transfer ZIF-8 layer to gerhardtite (Cu 2 (OH) 3 NO 3 ) with a hierarchical structure. Accordingly, the as-prepared PVDF/TA-gerhardtite membrane possessed attractive hydrophilicity and underwater superoleophobicity with oil contact angles above 150°, therefore achieving over 98 % oil rejection towards various surfactant stabilized oil-in-water emulsions. Moreover, self-cleaning properties can be realized by activating peroxymonosulfate, and 97 % of tetracycline hydrochloride, the target pollutant, was degraded within 30 min owing to the generation of sulfate radicals and hydroxyl radicals. Due to the attractive hydrophilicity and catalytic oxidation capacity of the gerhardtite hierarchical structure, degradation and bubble generation induced fouling recovery was accomplished after PMS cleaning, and the irreversible fouling decreased to 2.2 % after consecutive soybean oil fouling. Therefore, this work provides new insights into the construction of hierarchical structures on membrane surfaces and demonstrates their potential applications in oil/water separation and fouling mitigation.
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
SURFACE & COATINGS TECHNOLOGY
·
2016
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IF 2.139
Weiguo Zeng,Jun Chen,Hao Yang,Lidan Deng,Guangfu Liao,Zushun Xu
We have developed a facile and cost-effective method to fabricate superhydrophobic surfaces with self-cleaning properties in either air or oil environment. Firstly, a series of characterizations were conducted to show the reason why hydrophilic natural zeolite became hydrophobic. Then an ethanolic suspension of perfluorodecyltrichorosilane-coated natural zeolite was coated on both hard and soft substrates including glass and filter paper. Field emission scanning electron microscopy , atomic force microscopy and optical contact angle meter were used to characterize the morphology, roughness and wettability of the surface. The results showed that the coating had micro- and nanoscale hierarchical structures, which endowed the coating with excellent superhydrophobic and self-cleaning properties when exposed to either air or oil. Finally, when using double faced adhesive tape to bond the superhydrophobic coating to the glass, the coating remained superhydrophobicity after 30 cycles of sandpaper abrasion test. The robust superhydrophobic coating with self-cleaning properties in either air or oil may have a potential use as an equipment protective coating.
研究领域:
材料科学
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 25
·11874-11883
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IF 9.931
Huawen Liu,Xueting Zhao,Ning Jia,Arcadio Sotto,Yan Zhao,Jiangnan Shen,Congjie Gao,Bart van der Bruggen
Inspired by stomata, a series of single or dual thermo-/pH-responsive smart gating membranes (SGMs) were prepared with in situ assembled stimuli-responsive microgels as gates. Highly cross-linked poly(N-isopropylacrylamide-co-methylacrylic acid) P(NIPAM-co-MAA) microgels underwent in situ surface segregation during the acetic acid-assisted phase inversion process, and they were uniformly decorated on the surface of the membranes and the channels. The hydraulic permeability performance of SGMs was studied within the temperature range of 25–70 °C and a wide pH range (spanning pH 3–11). Investigations revealed that microgels based on different NIPAM/MAA ratios provided different thermo/pH-responsive properties to SGMs. Higher NIPAM/MAA ratios determined the thermo-responsive performance, and higher MAA/NIPAM ratios determined the pH-responsive performance. Moreover, the SGMs with in situ assembled microgels on the surface and channel surface have enhanced gating coefficients, stimuli-reversible behaviours and self-cleaning performance.
研究领域:
材料科学
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化学工程
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生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 4
·624
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IF 5.3
Nuo Chen,Kexin Sun,Huicong Liang,Bingyan Xu,Si Wu,Qi Zhang,Qiang Han,Jinghai Yang,Jihui Lang
A novel engineered carbon cloth (CC)-based self-cleaning membrane containing a Cu:TiO2and Ag coating has been created via hydrothermal and light deposition methods. The engineered membrane with chrysanthemum morphology has superhydrophilic and underwater superoleophilic performance. The cooperativity strategy of Cu doping and Ag coating to the TiO2is found to be critical for engineering the separation efficiency and self-cleaning skill of the CC-based membrane under visible light due to the modulated bandgap structure and surface plasmon resonance. The CC-based membrane has excellent oil–water separation performance when Cu is fixed at 2.5 wt% and the Ag coating reaches a certain amount of 0.003 mol/L AgNO3. The contact angle of underwater oil and the separation efficiency are 156° and 99.76%, respectively. Furthermore, the membrane has such an outstanding self-cleaning ability that the above performance can be nearly completely restored after 30 min of visible light irradiation, and the separation efficiency can still reach 99.65% after 100 cycles. Notably, the membrane with exceptional wear resistance and durability can work in various oil–water mixtures and harsh environments, indicating its potential as a new platform of the industrial-level available membrane in dealing with oily wastewater.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiang-Ping Chen,Qi-Jun Zhang,Chen-Xi Li,Chao-Yang Guo,Lu-Bin Zhong,Zhi-Hong Zheng,Jing-Yun Zhang,Zai-Dong Shao,Yu-Ming Zheng
The filtration of oil aerosols is crucial for safeguarding human health and protecting industrial machinery. While most research focuses on achieving high efficiency and low air resistance, limited studies have investigated filters that effectively combine these attributes with easy cleaning, primarily due to challenges associated with oil adhesion and the low mechanical strength of filter media. This study introduces a novel nanofibrous membrane (NFM) composed of fluorinated PVA/SiO 2 fibers, which exhibits cleanability alongside with high filtration efficiency. The F-PVA/SiO 2 NFM features a fibrous structure with periodic SiO 2 nano-protrusions on the PVA nanofibers, resembling the Chinese sweet Tanghulu . This design significantly enhances the surface roughness of the fibers. Moreover, the hydroxyl-rich PVA/SiO 2 matrix, in conjunction with the rough fiber surface, forms a durable amphiphobic coating after fluorination treatment. This coating retains its amphiphobic properties for over a year under ambient conditions while resisting swelling caused by organic solvents. Consequently, this design achieves an impressive filtration quality factor of 0.0190 Pa −1 , surpasses 95.58 % removal efficiency, and possessed an oil load capacity of 12.8 g m −2 . Furthermore, the filter can be easily regenerated through simple spray cleaning procedures without compromising its original filtration efficiency or experiencing significant pressure drop changes. Throughout ten consecutive filtration and cleaning cycles, the NFM consistently maintained its original filtration efficiency, with a 99 % restoration of pressure drop after each cycle. This F-PVA/SiO 2 NFM presents a practical solution for efficient oil aerosol filtration while offering excellent reusability and durability.
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 MEMBRANE SCIENCE
·
2025
·
IF 9
Song Liu,Qianqian Liu,Yun Cai,Xuemei Bao,Wenyao Zhou,Yang Yang
Combining membrane ultrafiltration with adsorption and advanced oxidation processes is considered to be an efficient strategy to improve removal capacity, alleviate membrane fouling and extend membrane lifespan for the treatment of wastewater with complex organic pollutants. The removal efficiency of small-molecule pollutants is closely related to the amount of adsorption sites, which is limited with the loading level of adsorbents. Herein, we proposed a blending-to-entrapping two-step method to load spherical resorcinol-formaldehyde (RF) resins, a metal-free photocatalyst with phenolic hydroxyl groups on surface, utmost possibly in the polyethersulfone (PES) membrane for removing small-molecule cationic pollutants from aqueous solution in an ultrafiltration process. By entrapping adequate RF resin microspheres in the finger-like pores of a PES ultrafiltration (UF) membrane blended with the RF resin microspheres, the obtained membrane possessed ultrafiltration and adsorption simultaneously based on pore size exclusion effect and electrostatic attraction, respectively. Owning to the photocatalytic in situ H 2 O 2 production ability of RF resins, the membrane also showed good reusability through a visible-light-induced self-cleaning process based on Fenton reaction. This work provides a feasible strategy to construct renewable adsorptive composite UF membranes for complex 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
危险品化学品经营许可证（带存储）