SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Nengwen Gao,Wei Fan,Zhi-Kang Xu
Protein separation and purification is important in biotechnology and food processing industries. Ceramic membranes have shown great potentials for this task. But membrane fouling remains a barrier to their widespread application due to the irreversible adsorption of protein onto the membrane. In this work, one-step co-deposition of dopamine (DA) and diglycolamine (DGA) was conducted on the ceramic membranes for fabricating protein-resistant surfaces. CuSO 4 /H 2 O 2 was used as a trigger to shorten the deposition time and to improve the deposition efficiency. The effect of DA/DGA mass ratio on the membrane structures and properties was studied by FESEM, FTIR, XPS and contact angle measurements. The results indicate that the optimal DA/DGA mass ratio in the co-deposition solution is 1:4. The modified membranes show improved hydrophilicity and negatively charged property. In dynamic protein filtration, these ceramic membranes exhibit a higher permeate flux, a higher water flux recovery, and a lower water flux reduction compared to the original membrane. Moreover, the antifouling property of the modified membrane is preserved after the membranes are treated with high speed water scouring. As a result, this one-step co-deposition method is a simple and effective way to prepare durable fouling-resistant ceramic membranes for protein removal.
研究领域:
生物技术
·
材料科学
·
分离工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Yueping Bao,Wen-Da Oh,Teik-Thye Lim,Rong Wang,Richard David Webster,Xiao Hu
A novel Co 3 O 4 nanocatalyst functionalized Al 2 O 3 ceramic membrane (CoFCM) with a honeycomb structure was prepared via an optimized surface-nucleated zeolitic imidazolate framework (ZIF-67) growth method. The Co 3 O 4 hollow structure which was confirmed via chemical characterizations (XRD, FTIR, Raman and XPS), was formed on the membrane surface by one-step calcination of ZIF-67 membrane. The CoFCM was characterized by various techniques including the field emission scanning electron microscopy and atomic force microscopy. The results revealed the formation of well-defined Co 3 O 4 layer on the porous Al 2 O 3 ceramic membrane with the thickness of 1.5–2 µm. The growth mechanism of CoFCM was further proposed via XPS and the catalytic activity of CoFCM was investigated for the removal of sulfamethoxazole (SMX) with the addition of Oxone. The membrane performance was examined under a home-made dead-end mode. Results indicated that CoFCM has a rougher surface with an initial membrane resistance of 1.19 × 10 11 m −1 and performs outstanding catalytic activity. The pure water permeability of CoFCM is 3024 L m −2 h −1 bar −1 , which is comparable to that of the pristine ceramic membrane (<10% difference). The SMX removal efficiency achieved to >90% in 90 min with an Oxone addition of 0.1 g L −1 . Meanwhile, the membrane showed excellent durability by retaining >95% of initial flux for at least 3 operational cycles with a low cobalt ion leaching via Oxone-assisted cleaning. Furthermore, the reaction mechanism of Oxone activation by CoFCM was proposed from the results of the electron paramagnetic resonance (EPR) and radical scavenger experiments.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Juan Ma,Juan He,Yanfei Niu,Congmi Cheng
Porous ceramic membranes with low-cost and high performance are desirable in industrial filtration field. To improve the performance while reducing the production cost, various measures were developed, however, pre-sintering of supports, preparation of membrane-forming suspensions and adoption of extensive organic additives that involved were adverse to cost reduction. Herein, cost-effective one-step co-pressing and co-sintering technique was proposed to prepare asymmetric ceramic membranes. The results revealed that pore parameters and performance of the fabricated membranes could be adjusted by altering mole ratio of Al 2 O 3 to SiO 2 (Al 2 O 3 /SiO 2 ) in the support and sintering temperature. The influence of supports on the permeation flux of membranes surpassed that of the parameters of membrane layer. Additionally, the oil rejection rate of the membranes exceeded 96 % within 2 min and even reached 100 % (~60 min), the water flux and steady-state feed flux were 1330–1730 L·m −2 ·h −1 and 470–620 L·m −2 ·h −1 at 1 bar, respectively. Moreover, cake filtration was the main fouling mechanism throughout the separation process. This research provides a feasible and simple method for preparing low-cost high-performance ceramic membrane for wastewater treatment .
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Fangwei Guo,Dong Su,Yang Liu,Jianming Wang,Xiao Yan,Jing Chen,Shunquan Chen
Tailoring the pore structures of ceramic membranes is the essential challenge in its application for wastewater treatment. In this paper, silicon oxycarbide (SiOC) ceramic membranes with tunable pore structures are fabricated by coating polysiloxanes (PSO) onto YSZ hollow fiber membranes followed with subsequent pyrolysis. The SiOC ceramics, with a pore size in the range of 50 nm-2 µm and porosity of 35–40%, have been obtained by varying the pore forming agents. Moreover, the SiOC layers endow the fiber membranes with high corrosion resistance regarding merely 0.07 wt% weight loss in 20 wt% H 2 SO 4 solution, since that the unique silicon oxycarbide microlattice structures can provide remarkable chemical durability. Together with considerable mechanical strength and pure water permeate flux, such SiOC ceramic membranes should find applications in industrial wastewater treatment.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2018
·
IF 3.794
Ming-Ye Yang,Jun-Wei Wang,Lin Li,Bin-Bin Dong,Xu Xin,Simeon Agathopoulos
This paper reports on the successful fabrication of γ-Y 2 Si 2 O 7 membranes with low thermal conductivity , which is an important membrane property for achieving high performance in membrane distillation process. Single-phase γ-Y 2 Si 2 O 7 powder was first synthesized by calcination of SiO 2 and Y 2 O 3 powders, with 3 wt% LiYO 2 as a sintering aid. The membrane was produced by tape-casting of a suspension of this powder. After sintering at 1300 °C for 4 h, a flat membrane was obtained, which had a thickness of 0.5 mm, 49% porosity, 0.9 μm pore diameter, and low thermal conductivity of 0.497 W/m⋅K at 32 °C, and 0.528 W/m⋅K at 100 °C. The obtained membrane presented hydrophobic features (water contact angle was 132°) after surface modification, which resulted in formation of a strongly adhered robust hydrophobic SiNCO nanoparticle layer on its surface. The resultant hydrophobic membrane was tested in water desalination experiments using a sweeping gas membrane distillation (SGMD) device. High water flux of 10.07 L⋅ m −2 ⋅ h −1 was achieved for a 20 wt% NaCl feeding solution and a temperature at the feed of 90 °C. Stable water flux and rejection rates were recorded in long-term experiments (>400 h).
研究领域:
材料科学
·
膜技术
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2015
·Vol. 11
·期 1
·81-87
·
IF 0.789
Jianxian Zeng,Zhaohui Qian,Xuejun Zhang,Hu Zhou,Peng Zhang,Lianggang Yi,Jun Tian
A novel modified ceramic membrane (CM-SiO 2 -A) has been prepared with the depositing and grafting technologies for removal of Ni 2+ from aqueous solutions. Firstly, the silica was deposited onto the surface of initial ceramic membrane (CM) by using the in situ hydrolysis deposition method and activated to obtain the silanol groups. Then, 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane was grafted onto the silica layer to obtain the CM-SiO 2 -A. The CM-SiO 2 -A was characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, Fourier transform-infrared spectroscopy, and thermogravimetric analysis. Further, the change of water flux and separation of Ni 2+ were studied by using the modified membrane. Results showed that the water flux of CM-SiO 2 -A was decreased by 84.79% compared with the CM. The CM-SiO 2 -A had a much higher total rejection rate of Ni 2+ (77.24%) than that of the un-grafted membrane (1.02%) at initial Ni 2+ concentration of 10 mg/L and exhibits the potential for separation of low concentration of Ni 2+ from aqueous solutions. Copyright © 2015 Curtin University of Technology and John Wiley & Sons, Ltd.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Chuntian Tan,Feihong Wang,Kai Lv,Yangyang Shi,Binbin Dong,Luyuan Hao,Liangjun Yin,Xin Xu,Yuxi Xian,Simeon Agathopoulos
Developing a highly efficient, cost-effective, and stable bifunctional electrode for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is still a major challenge. This work reports on a novel method for fabricating TiN ceramic membrane supported nitrogen-incorporating NiCo 2 nanowires (NiCo 2 -N/TiN) as a bifunctional electrode. Owing to its unique structure, the ample reaction sites available, and the enhanced mass/charge transport ability, the NiCo 2 -N/TiN electrode exhibits efficient catalytic performance both in HER and OER, with overpotentials of 131 mV at 20 mA·cm −2 for HER and 330 mV at 20 mA·cm −2 for OER, together with excellent stability in alkaline solution. The NiCo 2 -N/TiN electrode only requires a cell voltage of 1.71 V to drive the current density of 20 mA·cm −2 for overall water splitting, which exhibits excellent stability for more than 100000 s. Accordingly, the produced ceramic membrane electrode has a great potential for application in industrial hydrogen production.
研究领域:
材料科学
·
电化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Chenpei Zhou,Dong Zou,Yutang Kang,Shasha Feng,Zhaoxiang Zhong,Weihong Xing
The high gas permeance of ceramic membranes is the most important indicator of hot-gas filtration. Ceramic membranes made of fibers show significant potential for filtering dust-laden gases owing to their high porosity and high gas permeance. A novel method is proposed for preparing a SiC fiber separation layer on a rigid ceramic support that endows the membrane with a high porosity. However, the interfacial adhesion between the support and separation layers was low as there were insufficient connection points. Therefore, a solvothermal method was proposed for the in-situ vertical growth of TiO 2 nanocords on the surface of a SiC support (SiC–TiO 2 ). Next, a SiC fiber separation layer was deposited on the SiC–TiO 2 support to improve the interfacial adherence. The fabrication parameters of the SiC fiber layer, such as the solid content of the coating slurry and sintering procedure of the separating layer, were investigated in detail. At a SiC fiber content of 6 wt%, spray-coating times of 2, and sintering temperature of 1150 °C, a complete fiber layer was successfully deposited on the rigid ceramic support. The resulting membrane had a thickness of 100 μm, porosity of 91%, average pore diameter of 6.8 μm, and gas permeance of 440 m 3 ·m −2 ·h −1 ·kPa −1 . In the filtration of dust-laden gas containing SiO 2 as simulated dust (average particle size, 0.3 μm), the rejection rate was >99.9%; further, after four cycles of filtration–backwashing, the pressure drop was <0.82 kPa. The outlet dust content was less than 0.1 mg m −3 . Moreover, this membrane exhibited superior filtration ability at 500 °C. The findings of this study can aid the fabrication of ceramic fiber membranes with a high gas permeance and high interfacial adherence for industrial applications.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Jinxiu Fu,Shuo Sun,Juan Wang,Qianlong Fu,Xiaoyu Wang,Dong Wang,Shuang Li
The industrial application of ceramic membrane in wastewater treatment is usually inhibited by the high manufacturing cost. Here, a low-cost ceramic membrane with whisker-constructed microstructure was prepared using fly ash as the major material and AlF 3 as the catalyst. The influence of AlF 3 contents and sintering temperatures on the synthesis of mullite whiskers and consequently the permeance-selectivity of the whisker-constructed ceramic membrane, was investigated. With the increase of AlF 3 content, the pore-forming mechanism of the ceramic membrane transformed from particles-packing to mullite whiskers-interlocking. The formation and growth mechanism of mullite whiskers were clarified. The formation of silicate liquid-phase during sintering accelerated the shrinkage of the ceramic membrane and merged the short and fine whiskers. For the ceramic membrane with 10 wt% catalyst sintered at 1100 °C, the porosity and average pore size corresponded to 62.3% and 0.41 μm, respectively. Thus, this work provided a strategy for the preparation of mullite whiskers-constructed ceramic membrane with high porosity at low sintering temperature, which facilitated the high-valuable utilization of fly ash spontaneously.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Membranes
·
2023
·Vol. 13
·期 4
·443
·
IF 4.2
Xinqiang Xu,Hua Zhang,Jiang Jin
A novel approach to evaporate brine wastewater using a ceramic aeration membrane was proposed. A high-porosity ceramic membrane was selected as the aeration membrane and was modified with hydrophobic modifiers to avoid undesired surface wetting. The water contact angle of the ceramic aeration membrane reached 130° after hydrophobic modification. The hydrophobic ceramic aeration membrane showed excellent operational stability (up to 100 h), high salinity (25 wt.%) tolerance, and excellent regeneration performance. The evaporative rate reached 98 kg m−2h−1,which could be restored by ultrasonic cleaning after the membrane fouling occurred. Furthermore, this novel approach shows great promise for practical applications toward a low cost of only 66 kW·h·m−3.Keywords:high-porosity ceramic membrane;hydrophobic modification;brine wastewater;aeration evaporation
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Dan Gao,Yuanyuan Cao,Zhaohao Li,Niankun Guo,Hongyuan Zhang
The waste heat utilization in the coal-fired plant has always been one of important ways of the energy saving. In this paper, a novel device is constructed by the combination of the ceramic membrane desorption and the flue gas waste heat utilization. In the device, the absorption solution is the “double-cationic” ionic liquid ([TEPA][1-MIm]). Furthermore, experimental results show that the contact angle of the hydrophobic ceramic membrane is 130°. Under ambient temperature conditions, it is observed that at a concentration of 25 % [TEPA][1-MIm] in an ethylene glycol solution, the maximum absorption amount of CO 2 reaches approximately 1.605 mol CO 2 /mol amine. The saturation time of the absorption is about 20 min. As the concentration of ionic liquids increases, the saturation time gradually extends due to an increase in [TEPA][1-MIm] and consequently higher total CO 2 absorption mass. Subsequently, effects of the operating parameters on the desorption rates are analyzed. The contribution of this work is to put forward the idea of utilizing ceramic membranes to recover the waste heat from the flue gas to reduce the CO 2 desorption energy consumption. According to experiments, the overall heat transfer coefficient can reach 20.33 W/(m 2 ·K), and the amount of the recovered waste heat can reach 29.97 W.
研究领域:
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Peng Xu,Zhihao Jin,Tianyu Zhang,Xianfu Chen,Minghui Qiu,Yiqun Fan
The composition of ship exhaust gas is complex and a great challenge to the long-term stability of a membrane contactor. In this work, a facile method for constructing a functional surface on an alumina membrane substrate was realized for antiparticle or antidust adhesion in the process of exhaust-gas desulfurization. Polytetrafluoroethylene (PTFE) nanoparticles were dispersed, coated, and thermally sintered on the outer surface of an alumina membrane substrate to obtain a robust defect-free layer that exhibited hydrophobicity and a low friction coefficient. The PTFE coating served as a protective layer with low surface energy, low surface roughness, and a low coefficient of friction, which reduced the adhesion of foulants and facilitated their release. Meanwhile, the porous alumina substrate, wetted by an ammonia solution, still achieved excellent membrane absorption performance for SO2. In desulfurization and antiparticle testing, the PTFE-coated membrane not only showed the same absorption performance as the original membrane but also demonstrated greater resistance to particle adhesion in a dusty environment throughout 12 h of testing. These results indicated that the designed membrane can be utilized for gas absorption in a dusty environment.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）