SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Zehao Chen,Ting Zhao,Qing Tan,Jihao Zuo,Shouping Xu,Yunjun Nong,Xiufang Wen,Pihui Pi
The crude oil spillage and large-scale industrial release of oily effluents has led to significant ecological degradation and resource wastage. Traditional superwetting materials encounter intractable challenges for treating surfactant-stabilized oil–water emulsions, including trade-off effect of permeation flux and separation efficiency, and low emulsion processing life. These issues considerably impede advancements in oil–water separation industry. In order to enhance the demulsification durability of materials while ensuring high separation efficiency and flux, this work doped perfluorooctanoic acid (PFOA) onto the modified sponge surface with superhydrophilic charged surface, and a unique in-air superhydrophilic-oleophobic sponge was prepared. This special surface allows rapid water phase permeation yet offers remarkably more stable oleophobicity compared with traditional underwater oleophobic materials when processing a large amount of emulsions. The intrinsic oleophobicity endows the sponge outstanding fouling resistance and greatly increases the one-cycle emulsion treatment amount up to 1695 L·m −2 . Moreover, the sponge's inherent long permeation channels and surface charge maintain a high separation efficiency of over 97 %. The large pores of the sponges and superhydrophilic surface provide a high permeation flux exceeding 40,000 L·m −2 ·h −1 . The sponge with high separation efficiency, flux, and capacity marks a significant advancement, offering a promising strategy for superwetting material applications in oil-in-water emulsion separation fields.
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 Applied Engineering Materials
·
2024
·
IF 0
Xu Meng,Yanyan Dong,Chengzhi Song,Manuel J. Lis Arias,Junfeng Yan,Liping Liang
A hydrophobic and lipophilic cotton fabric based on mussel-inspired chemistry was developed to improve surface durability. The surface morphology and wettability of the modified fabrics were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric/differential thermal analysis, and contact angle measurement. The water contact angle and surface wettability analysis showed that the modified cotton fabric had a water contact angle of 154.9°, and the modified cotton fabric could be driven by gravity to separate the mixture of oil and water and had good separation efficiency for different types of oil and water mixtures, which was equal to or greater than 97% on average. In addition, the oil/water separation flux could be controlled by adjusting the pore size of the modified fabric.
研究领域:
材料科学
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化学工程
·
纺织工程
✓ 已验证
DOI
JOURNAL OF CHEMICAL PHYSICS
·
2020
·Vol. 152
·期 24
·
IF 2.991
Zhu Jingxian,Jiang Wenshuai,Wang Bin,Niu Lijuan,Dong Chenxi,Qu Dan,An Li,Wang Xiayan,Sun Zaicheng
Mixed phase TiO 2 (Degussa P25) exhibits superior photocatalytic performance and stability due to the formation of the hetero-phase junction between anatase and rutile. However, the large bandgap limits its visible light activity. CdS is a photocatalyst with a broad light absorption band up to 550 nm. Constructing a hetero-phase junction will greatly promote the photocatalytic activity of CdS. In this work, the one-step solvothermal method was used to synthesize CdS hetero-phase junction with both hexagonal wurtzite (WZ) and cubic zinc blende (ZB) phases. The ratio of WZ and ZB phases can be tuned by adjusting the solvent ratio and reaction time to construct type I junction and effectively separate the photogenerated electron–hole pair. Under visible-light illumination, the optimal photocatalytic activity of the prepared material reaches 7.96 mmol h −1 g −1 , and the quantum efficiency is 36.7% at 420 nm, which is three times higher than that of any single-phase sample (cubic or hexagonal phase) and maintains high photocatalytic stability as well. It is expected that this work will provide a feasible prospect for the practical application of high-efficiency homogeneous junction photocatalysts.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 27
·11044-11061
·
IF 4.5
Li Ruhui,Yu Ruobing,Fan Junhan,Chang Bu
With the fast growing of oily contaminants, continuous oil/water separation with high flux is in demand. Superhydrophilic/superoleophobic composites are considered as ideal candidates. In this work, the oil–water separation composite is from superhydrophilic copper mesh coated by robust superhydrophilic/superoleophobic paint based on fluorine-containing epoxy resin. Firstly, a superhydrophilic/superoleophobic coating with excellent comprehensive properties was prepared through hydrophilic epoxy and superhydrophilic/superoleophobic TiO 2 . Then copper mesh was treated into being superhydrophilic, and the superhydrophilic/superoleophobic coating was sprayed on the superhydrophilic copper mesh to obtain oil–water separation material. As a result, the oil–water separation efficiency of the separation material is higher than 99.7%, the water flux is higher than 80,000 L m −2 h −1 , and it has excellent mechanical properties. The oil–water separation material is promising for the applications.
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 MOLECULAR LIQUIDS
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2023
·
IF 6
Hao Ma,Shuqian Xia,Fuce Yu,Caixia Sun,Alexandre Cameron,Wangang Zheng,Qinglin Shu,Guang Zhao,Haihua Pei,You Han
Emulsification and separation are of great significance in oil recovery. Herein, we report a synergic system of polymers and silica particles, which can achieve the emulsification and separation of heavy oil through the alkaline/acidic solution. Since the high salinity of formation water is an inevitable issue for chemical waterflooding, the effects of salinity on the properties of heavy oil emulsions were investigated by the zeta potential, interfacial tension (IFT), separation efficiency, dynamic light scattering (DLS), and rheology in experiments. The results show that heavy oil emulsions at extreme salinity (up to 50 g/L) remain stable under alkaline conditions. But conversely, the separation process of heavy oil emulsions is expedited under acidic conditions. Furthermore, the interaction mechanism is also elucidated by molecular dynamics simulations to provide a well-researched interpretation of the experimental phenomena. The self-assembly between the polymer and silica particles is seriously affected by the salt ions through the electrostatic screening effect, with increasing zeta potential values from −52.5 mV to −18.1 mV, and the interfacial films are crippled, exhibiting more viscous properties, which induces the separation of heavy oil emulsions. However, it can be stable under alkaline conditions with separation efficiencies of less than 14.3% in 24 h. This novel reversible PS system is used in hypersalinity (30 g/L) to realize emulsification and separation without any demulsifiers, breaking through the current salinity limit of polymer waterflooding (EOR increased by 15.51%). The findings of this study can help for a better understanding of the molecular mechanism of switchable heavy oil emulsions and develop a potential solution for EOR in reservoirs with high salinity.
研究领域:
石油工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2018
·
IF 3.024
Yongtao Wang,Yuhao Zhang,Feng Chen,Meng Zheng,Liang Zhao,Jinsen Gao,Tianzhen Hao,Chunming Xu
In order to disclose the separation of olefins from aromatics or thiophene compounds by organic solvents, vapor–liquid equilibrium data for ternary systems of olefins + aromatics/thiophenes + sulfolane (SUL) /N-methyl-2-pyrrolidone (NMP) were investigated at atmospheric pressure in a modified Rose dual-circulating vapor–liquid distiller. This work primarily focused on studying the relationship between separation efficiency on olefins and the structure and concentration of olefins and aromatics. From the point view of structure, the results showed that more methyl existing on both olefins and aromatics could lead to stronger hydrogen bond interaction with solvents than that of olefins and aromatics, which do not include methyl in their molecular structure. So there was higher olefin-separating efficiency for the systems containing 1-hexene (HEX)/3-methylthiophene (MTHI)/1,2,4-trimethylbenzene (TMB) than those of 2,4,4-trimethylpentene (TMP)/thiophene (THI)/toluene (TOL), respectively. Besides, when it came to the concentration of olefins or aromatics in model gasoline, the effect of separating olefin appeared remarkable when the concentration of olefins was below 40% or the concentration of aromatics was above 60%. When the separation effect of solvents was compared, the SUL outperformed the NMP because of the large relative volatility observed for the systems of “HEX + THI/MTHI/TOL/TMB”. It is worth noting that the two oxygen atoms on SUL locating the same orientation help form stronger hydrogen bonds between compounds and SUL than that of NMP. These findings powerfully facilitated the structure–effect relationship for separation of olefins from aromatic chemical compounds, which give a clear direction for upgrading of clean gasoline by efficient separation of olefins and removal of sulfides from FCC gasoline.
研究领域:
化学工程
·
石油炼制
✓ 已验证
DOI
高影响因子
Nanoscale
·
2025
·
IF 5.1
Bo Li,Lipan Luo,Yujia Liu,Xiaohan Zhou,Yuyu Zhang,Lishuai Song,Nan Liu,Qing Tang,Zequan Li
Pt/TiO2 photocatalysts were synthesized using incipient wetness impregnation followed by oxidative and/or reductive thermal treatments. The loading dimensions of Pt elements on the TiO2 surface (PtP, PtSA, and PtC) were controlled by varying the impregnated solution. Experimental results demonstrate that PtC with intermediate size exhibits the highest photolysis rate under 300W xenon lamp irradiation, achieving a hydrogen yield of 11.42 mmol g^-1 h^-1 and an apparent quantum yield of 40.65%. Similarly, Ru/TiO2 and Ir/TiO2 photocatalysts prepared under the same conditions exhibited the same pattern. Photoelectrochemical tests reveal that PtC/TiO2 has the narrowest band gap, the highest interfacial charge transfer capacity, and the greatest carrier separation efficiency. DFT calculations indicate that PtC/TiO2 has the most suitable d-band center, resulting in a close-to-zero ΔGH* value of 0.05 eV. This optimal value significantly balances the adsorption and desorption of hydrogen intermediates (H*) during the photocatalytic hydrogen evolution (PHE) reaction. This study provides new insights into the preparation of precious metal-loaded photocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Chonggang Wang,Youming Yang,Jiuyang Lin,Feifei Yang,Hongmei Ye,Xuewei Li,Yinhua Wan
At present, in the mining process of ionic rare earths, the separation of rare earth element (REEt) from aqueous solution still relies on natural sedimentation, which has the disadvantage of low efficiency. Additionally, there will be a significant amount of rare earth ions (∼ 30 ppm) remaining in the supernatant. In this work, the use of flat ceramic membranes to separate REEt from aqueous solution is innovatively proposed. Firstly, the performance of REEt separation by flat ceramic membrane process was determined. It was found that the flat ceramic membrane process had good interception performance for REEt separation, and the concentration of rare earth ions in the supernatant was close to 0 ppm. Then, the impacts of different operating conditions (including operating time, backwash duration and concentration times) on the membrane fouling process were investigated. It was demonstrated that the shorter the operating time, the less the degree of membrane fouling. The operation of back washing was greatly beneficial to renew membrane flow. The change of reversible pollution resistance was calculated, the process of membrane pollution was analyzed by four pollution models, and the pollution mechanism was discussed in detail. Furthermore, the recovery of membrane flow after chemical cleaning and non-agent cleaning, and the changes in reversible fouling resistance under different concentration multiples were also studied. It is proved that the immersed flat ceramic membrane has the characteristics of low membrane fouling, high solid–liquid separation efficiency, and good stability for the separation and enrichment of rare earth particles, which shows great potential in industrial applications.
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
CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Furong Ye,Wen Liu,Changcun Han,Yahao Zhao,Peng Liu,Hui Wang
This study introduces Au nanoparticles into ZnIn2S4 through electrodeposition to overcome the limitation of rapid charge carrier recombination on the photoelectrochemical efficiency. The strong coupling of Au nanoparticles with the FTO substrate not only serves as an electron acceptor but also exhibits a surface plasmon resonance (SPR) effect, significantly enhancing charge carrier separation efficiency. Experimental results demonstrate that the introduction of Au nanoparticles notably improves the light absorption capability of ZnIn2S4, enhancing its solar energy conversion efficiency and rendering it an effective photoelectrocatalytic catalyst. Electrochemical analysis shows that the modified sample achieves a photocurrent density of 0.52 mA/cm2 at 1.23 V (vs RHE), which is 2.15 times that of pure ZnIn2S4, validating the potential of this approach for photoelectrocatalytic applications.
研究领域:
材料科学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Guoxun Ben,Dong Guo,Yubing Liu,Zhigang Tang,Lanyi Sun,Jie Kong,Tianzhong Wu,Zhengang Guo,Gang Zhao,Wei Wang,Hongwei Li
Benzyl methyl ether (BME) was developed as an extractant for separating dimethyl carbonate (DMC) from methanol (ME). The study evaluated the performance of extractive distillation columns (EDWC) with single and two walls through experiments and simulations. The two-wall EDWC demonstrated superior separation efficiency, achieving ME and DMC purities above 99.9% under optimal conditions: solvent-to-feed ratio of 8, 45 theoretical stages, atmospheric pressure, extraction section/azeotropic separation section sideline at the 34th plate, azeotropic separation/DMC purification section sideline at the 20th plate, 12 theoretical stages in the common rectification section, and vapor split ratios of 0.42 (extraction section/azeotropic separation section) and 0.27 (azeotropic separation/DMC purification section). Experimental results aligned well with the simulations. The EDWC with two walls, which integrates the extraction section, azeotropic separation section, and DMC purification section with shared reboiler heating, offers significant potential to replace current DMC/ME separation processes and reduce production costs.
研究领域:
化学工程
·
分离技术
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Lijun Liu,Wenya Tang,Lu-Yang Zuo,Hui-Tao Fan,Bo Li,Liya Wang
Semiconductor photocatalytic hydrogen evolution (PHE) has emerged as a feasible solution to address the problem of energy shortage. Hydrogen energy can thus be developed by creating a photocatalyst with a high activity for producing hydrogen and an effective charge transfer route. This study describes the preparation of innovative hierarchical ZnMn2O4@ZnIn2S4 (ZMOZ) ball-in-ball hollow microspheres as photocatalysts using a straightforward solvothermal technique. Remarkably, the PHE rate of the 10% ZMOZ can reach 11.12 mmol h–1 g–1, it roughly 4.9 greater than pure ZnIn2S4 (ZIS). Aside from the benefits of building heterojunctions, the regulation of morphology such as hollow structures that can provide more exposed active sites and enhance the light-absorption capability by internal multilight scattering. Through the use of density functional theory calculations (DFT), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectra as well as time-resolved PL (TRPL) spectroscopy also demonstrate that the charge separation efficiency in the composite was notably improved. This work offered a cost-effective and environmentally friendly method for utilizing visible light to construct an effective PHE.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Xiaolong Gong,Wenming Jiang,Shengli Hu,Zhiyuan Yang,Xinwang Liu,Zitian Fan
Clay sand casting generates a large amount of foundry dust (FD), and the presence of coal powder in the FD makes it difficult to recycle and utilize. The landfill of the FD creates a serious environmental pollution and wastes a valuable resource. To improve the above situation, the FD was analyzed and characterized by X-ray fluorescence spectrometer (XRF), X-ray diffraction (XRD) and electron probe microanalyzer (EPMA). An ultrasonic-assisted flotation process was developed for the comprehensive utilization of the FD, and the effects of ultrasonic time on the flotation performance and flotation kinetics were investigated. In addition, the two-stage flotation of the FD was conducted. Obtained results showed that the FD mainly consisted of coal powder and clay minerals, and the coal powder was covered by clay minerals. The separation efficiency of the coal powder and clay minerals can be significantly enhanced by ultrasonic pretreatment , and the optimal ultrasonic time was 30 min. The flotation kinetics analysis results indicated that the first-order model with rectangular distribution was more reasonable for the data fitting of the ultrasonic-assisted flotation. Furthermore, the concentrate and tailings obtained by the two-stage flotation had achieved an acceptable result, favoring the comprehensive utilization of the FD.
研究领域:
环境科学
·
材料科学
·
矿物加工工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）