JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Yunhuan Chen,Xinyue Liu,Rui Zhang,Weier Wang,Hailong Wang,Yongsheng Ren,Xiaoxiao Duan
High permselectivity and antifouling/self-cleaning nanofiltration (NF) membranes are ideal materials for water treatment, and this vision is expected to be reached through the design of multifunctional self-cleaning interfaces. In this study, we employed metal - polyphenol network (MPN) to mediate in situ mineralization of porous substrates, enabling simultaneous modulation of interfacial polymerization (IP) and catalytic self-cleaning. The findings demonstrate that the mineralized layers employ an interlayer modulation strategy to produce a polyamide (PA) layer that is more hydrophilic, thinner, and structurally denser. As a result, the resulting PA-Fe 3 O 4 -PSF membrane exhibited a 2.5-fold increase in permeance (19.2 L m −2 h −1 bar −1 ) and a 7.3-fold enhancement in Cl − /SO 4 2− selectivity (66.4), compared to the control membrane (PA-PSF). Additionally, its highly polarized membrane surface significantly improved its antifouling performance. Compared to membranes with mineralized layers on the surface (Fe 3 O 4 -PA-PSF), PA-Fe 3 O 4 -PSF constructs a confined space that facilitates more efficient regeneration through in situ catalytic self-cleaning and ensures greater stability during multiple fouling-regeneration cycle operations. This study paves the way for fabricating multifunctional NF membranes with sustainable applications in material concentration, wastewater treatment, and environmental remediation.
研究领域:
水处理
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膜科学
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材料科学
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环境工程
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产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2017
·Vol. 43
·期 7
·3961-3974
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IF 1.369
Jiao Yinchun,Zhu Man,Deng Renjie,Jian Jian,Yin Yi,You Kuiyi
With the increase in environmental awareness, developing a highly efficient and environmentally benign nitration process has very important academic and applied industrial values in the synthesis of nitro-compounds. Towards this goal, we have developed an efficient and environmentally friendly approach for solvent-free liquid phase nitration of toluene by employing NO 2 as a nitrating agent and sulfated SO 4
2− /WO 3 as a catalyst replacing traditional nitric acid–sulfuric acid under mild conditions. The results indicate that SO 4
2− /WO 3 as an effective and eco-friendly catalyst exhibits excellent catalytic activity and reusability for the nitration of toluene with NO 2 . In addition, the possible pathway for liquid phase nitration of toluene with NO 2 over sulfated SO 4
2− /WO 3 catalyst was suggested. The present method makes this nitration process safe and environmentally friendly, and has the potential to enable a sustainable production of nitro-compounds from the liquid phase nitration of aromatic hydrocarbon with NO 2 in industrial applications.
研究领域:
催化化学
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绿色化学
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有机合成
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环境友好工艺
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工业化学
✓ 已验证
DOI
高影响因子
Energy Technology
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2024
·
IF 3.6
Dongyin Niu,Tiantian Zhang,Xuedan Zhang,Yufei Tan,Lukai Zhai
Under the background of vigorously promoting clean heating, the introduction of phase-change energy storage technology into heating systems has become a new hot issue. In this study, a novel KAl(SO 4 ) 2 ·12H 2 O/expanded graphite (EG) shape-stabilized composite phase-change material (PCM), with a melting temperature of 91.6 °C, latent heat of 245.7 kJ kg −1 , and high heat conductivity of 2.07 W m −1 K −1 , is prepared to manufacture a PCM-based module for space heating. This phase-change electric heating module is developed, and its heat storage and release characteristics are investigated through experimental and numerical studies. The numerical model is validated by experimental results. In view of the numerical simulation, the structure of the module is optimized and its thermal performance is studied. Based on the optimized module, a peak-valley time-of-use (TOU) electric heating module is finally proposed. It is revealed that the module exhibits good thermal performance and is capable of satisfying the indoor heating demand. The effective heat storage and release duration is 8.12 and 15.34 h, which can perfectly realize the operating mode under the “peak-valley TOU electricity” mechanism. In this study, it is demonstrated that peak–valley electric energy storage heating devices have broad prospects in building space heating and provides reference for future application.
研究领域:
能源工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Zhen Liu,Huajun Zhou,Simon S. Ang,Jian-Jun Zhang
Here we report the evaluation of natrochalcite (Na[Cu 2 (OH)(H 2 O)(SO 4 ) 2 ]), an anionic layered structure [Cu 2 (OH)(H 2 O)(SO 4 ) 2 ] − charge-balanced by Na + , as an anode material for both Li- and Na-ion batteries. It delivers 224 mAh/g and 175 mAh/g in the first discharge in the Li + - and Na + -cells respectively, and decomposes to form amorphous matrixes during this step. In the subsequent charge, the original layered structure is unusually partially recrystallized back from the matrixes, resulting in 53 mAh/g and 35 mAh/g discharge capacities in the second discharge respectively. In subsequent cycling, Li + in the electrolyte is found to replace the original Na + during cycling in the Li + -cell and the electrode in the Li + -cell demonstrates better capacity retention rates than that in the Na + -cell, possibly due to Li + being smaller than Na + and thus decomposition-recrystallization cycles being more reversible during cycling in the Li + -cell.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2018
·
IF 3.849
Jie Gao,Lizhe Yang,Yingying Liu,Fengli Shao,Qianjiahua Liao,Jingge Shang
Nano scale zerovalent iron (nZVI) used in waste water treatment can be more effective when modified with sulfur. In this study, we synthesized biochar-supported sulfide-modified nZVI (S-nZVI/BC) and characterized it using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. Our results reveal that sulfidation resulted in the formation of FeS on the surface of S-nZVI/BC. The Cr(VI) removal efficiency and capacity of the above composite were investigated as a function of initial solution pH/Cr(VI) concentration, reaction time, and presence of background ions (Ca 2+ and SO 4 2– ). Batch experiments revealed that solution pH had a significant impact on Cr(VI) removal capacities, with the maximum observed at pH 2.5. From a kinetic viewpoint, Cr(VI) removal was best described by a pseudo-second-order model. Importantly, the scavenger reaction was significantly promoted in the presence of SO 4 2– , being slightly inhibited by Ca 2+ and dissolved oxygen. Thus, the sulfidised nanohybrids exhibited excellent Cr(VI) removal performance, being well suited to the remediation of Cr(VI)-polluted water.
研究领域:
环境科学
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材料科学
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水处理
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产品关联
DOI
高影响因子
Catalysts
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2020
·Vol. 10
·期 2
·207
·
IF 3.52
Hua Nie,Wei Li,Qirong Wu,Vladislav Rac,Vesna Rakić,Xuesen Du
Poisoning effects by alkali metal chlorides is one of the major reasons for the deactivation of SCR catalyst in biomass-fired plants. In this study, the influence of KCl on two vanadium-based catalysts with different promoters, V2O5-WO3/TiO2and V2O5-Ce(SO4)2/TiO2, was investigated. The catalytic activity of the fresh V2O5-WO3/TiO2was higher than that of V2O5-Ce(SO4)2/TiO2at low temperatures. V2O5-Ce(SO4)2/TiO2performed better than V2O5-WO3/TiO2when KCl was deposited on the catalyst surface. Both poisoned catalysts were efficiently regenerated by SO2treatment. The characterization results show that the reducibility and acidity of the catalysts were weakened by KCl deposition but regenerated by SO2.
研究领域:
环境催化
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大气污染控制
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材料化学
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工业催化
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能源工程
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
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2024
·
IF 8.9
Biao Hu,Jiachen Li,Xin Du,Zhenying Zhang,Hui Wang
A novel eutectic phase change material with light absorption and high thermal conductivity was successfully prepared. The based phase change material was ammonium aluminum sulfate dodecahydrate‑sodium sulfate eutectic phase change materials. The black Ti 2 O 3 after ball milling was selected as light thermal conversion material which can absorb sunlight effectively and simultaneously convert the light to thermal and the expanded graphite was added to further improve the thermal conductivity of phase change materials. The phase change temperature of the eutectic phase change material was effectively regulated to 80 °C compared with 93 °C of pure aluminum sulfate dodecahydrate. The thermal conductivity of eutectic phase change materials with expanded graphite was enhanced to 1.16 W·m −1 ·K −1 compared with 0.53 W·m −1 ·K −1 of the pure eutectic phase change material. By adding Ti 2 O 3 , the combination material shows the best solar absorbance capacity of 87.96 % compared with the pure eutectic phase change materials of 73.43 %. The latent heat of the novel material was 190.97 kJ/kg. Considering their huge superiority of highly efficient use of solar energy in natural resources, the new novel ammonium aluminum sulfate dodecahydrate‑sodium sulfate eutectic-based phase change material with excellent light absorbance, enhanced thermal conductivity, and high latent heat performance is a very promising material for solar-thermal conversion and energy storage.
研究领域:
材料科学
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能源工程
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太阳能技术
✓ 已验证
产品关联
DOI
高影响因子
HYDROMETALLURGY
·
2024
·
IF 4.8
Lining Yu,Huazhen Cao,Huibin Zhang,Junfeng Kong,Weilun Qian,Anyang Tang,Wenyu Feng,Guoqu Zheng
Owing to the characteristics of mineral paragenesis (equilibrium sequence of mineral phases), the hydrochloric acid leach liquors of Sn ores and Sn-containing waste materials typically contain large amounts of Pb. In this study, barium sulfate coprecipitation was employed to efficiently remove Pb from a tin chloride solution. The lead removal efficiency, reaction mechanism, and limitations were investigated by varying the Cl − and SO 4 2− concentrations. The results showed that the structural formula of the precipitates was (Ba x Pb y )(SO 4 ) 2 (x + y = 2), and its solubility product was in the range of 1 × 10 −12 –1 × 10 −13 , indicating that Pb 2+ and Ba 2+ were more easily precipitated in the form of complex salts. In addition, thermodynamic analysis revealed that when the Cl − concentration was <1 mol/L in the Pb 2+ –Sn 2+ –Cl − –H 2 O system, [Pb 2+ ] and [PbCl + ] were the primary species. These positively charged species were readily adsorbed onto the surface of BaSO 4 via electrostatic forces, resulting in a significant increase in the Pb content of (Ba x Pb y )(SO 4 ) 2 . Therefore, the Pb removal efficiency significantly improved as Cl − concentration decreased. The lead removal mechanism involves a combination of adsorption and replacement processes. Based on the aforementioned fundamental study, a method involving dechlorination and coprecipitation was proposed to remove lead from an acid leaching solution of Kaldo slag. With the dechlorination via distillation, the Pb removal efficiency could reach 99.9% at 1 mol/L Cl − and 0.5 mol/L SO 4 2− .
研究领域:
冶金工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Shao-Fang Li,Zhen-Yi Gu,Jin-Zhi Guo,Xian-Kun Hou,Xu Yang,Bo Zhao,Xing-Long Wu
In recent years, sodium-ion batteries (SIBs) have been considered as one of the most promising alternatives to lithium-ion batteries (LIBs). Here, a new Na-super-ionic conductor (NASICON) cathode material NaFe 2 PO 4 (SO 4 ) 2 is successfully prepared through solid state method for SIBs. While the poor electronic conductivity of iron-based materials results in its poor rate and cycle performance. Then the electrochemical is effectively promoting via Ca 2+ doping. Na 0.84 Ca 0.08 Fe 2 PO 4 (SO 4 ) 2 have achieved considerable electrochemical properties. The first discharge specific capacity is 121.6 mA h g −1 at 25 mA g −1 with the voltage platform (∼3.1 V) corresponding to Fe 2+/3+ . After 100 cycles, the capacity retention is 55.1 %. The excellent electrochemical performance is caused by some Na + is substituted by Ca 2+ and leading to the fast sodium kinetics, which is well proved by the powder X-ray diffraction pattern and well corresponding to the galvanostatic intermittent titration technique and cyclic voltammetry testing result (the diffusivity values are around at 10 −12 cm 2 s −1 ).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Tingting Liao,Fan Luo,Xianghui Liang,Shuangfeng Wang,Xuenong Gao,Zhengguo Zhang,Yutang Fang
As energy shortage intensifies, improving energy efficiency and reducing energy consumption have become essential topics. Herein, a form-stable composite phase change material (FCPCM) consisting of modified expanded graphite (MEG) and eutectic hydrate was designed as a reliable and efficient thermal energy storage medium. Firstly, novel binary eutectic hydrate involving oxalic acid dihydrate (H 2 C 2 O 4 .2H 2 O) and ammonium aluminum sulfate dodecahydrate (NH 4 Al(SO 4 ) 2 .12H 2 O) served as an excellent thermal energy storage guest. Zirconium dioxide (ZrO 2 ) was used as a hydrophilic modifier because of its high heat resistance, high inertness, corrosion resistance , non-toxicity and countless hydrophilic groups . Therefore, the hydrophilic modified expanded graphite (MEG) as a supporting host was constructed by dip-coating of nano ZrO 2 sol on the surface of expanded graphite (EG), which improved its hydrophilicity and compatibility with a eutectic guest. Compared with the original EG (83.05°), the contact angle of MEG containing 10 % ZrO 2 on the water was decreased to 37.95°. In addition, the adsorption rate and capacity of MEG to binary eutectic were much faster and larger, reaching an approximate saturation (65.58 %) within 40 min, which was three times that of the untreated EG (23.10 %) in the same adsorption time. The resultant FCPCM containing 24 wt% MEG exhibited a good phase transition temperature (54.10 °C), high phase transition enthalpy (168.5 J/g), as well as excellent anti-leakage behavior. After 100 hot and cold cycles, the thermal performances of FCPCM kept relatively stable, which guaranteed its sustained thermal benefits. It provides a potential application in the field of solar phase change heat exchangers .
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Ruijun Zhang,Wenqian Zhu,Jiayu Tian,Shanshan Gao,Bart Van der Bruggen
Reverse osmosis is an effective seawater desalination way extending the available sources of fresh water, but challenged by the gypsum scaling. Herein, D (+)-glucosamine (DGA) was rationally selected and utilized to prepare a novel polyesteramide (PEA) NF membrane that can reject SO 4 2− but release Ca 2+ . Then it was employed in the pretreatment of seawater reverse osmosis to spatially isolate SO 4 2− and Ca 2+ , thus removing the “foundation” for forming gypsum. Compared to the referenced NF270, the optimized sample denoted as DGA-PEA-NF has a looser structure with stronger negative charge, as well as a higher resistance to both organic fouling and chlorine attack. During the pretreatment of seawater, both the water permeability and SO4 2− /Ca 2+ selectivity of the DGA-PEA-NF membrane were much higher than those of NF270; the seawater permeance and SO 4 2− /Ca 2+ selectivity of DGA-PEA-NF were 10.25 L m −2 ·h −1 ·bar −1 and 7.62, respectively, while those of NF270 were only 5.11 L m −2 ·h −1 ·bar −1 and 2.08. Consequently, the DGA-PEA-NF membrane effectively reduced the gypsum scaling both in NF and RO stages rather than just transferring the fouling problem forwards to NF stage. The implementation of this research is expected to provide guidance for a targeted fabrication of NF membranes, as well as support for the sustainable development of seawater desalination.
研究领域:
材料科学
·
环境工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xiao Feng,Hao Chen,Siyuan Guo,Xiaoyu Wang,Tengfeng Xie,Dejun Wang,Yanhong Lin
Efficient photocatalysts are key to achieving efficient photoactivation of AOPs based on PMS. In this work, a sulfur-rich vacancy magnetically separable Fe 0 /CoS 2 -S v photocatalyst with high surface adsorption capacity and rapid PMS activation capacity was designed for the efficient degradation of typical antibiotics. A tetracycline removal rate of 92.2 % and a high TOC mineralization rate were achieved within 4 min in the PMS/Vis system. The excellent catalytic performance was attributed to the synergistic effect of Fe, Co, and S on PMS activation and the generation of sulfur-oxygen vacancies by the composites. These vacancies greatly enhanced the catalytic performance of the PMS system, where the generated singlet oxygen ( 1 O 2 ) was identified as the main active substance in the degradation process. In addition, the SO 4 2- based photocatalytic-assisted advanced oxidation processes (SR-AOPs) for the degradation of organic pollutants were thoroughly investigated. XPS comparisons before and after the catalyst reaction revealed that the reducing nano-Fe 0 and metastable S 2 2- promoted the cycling between Co 3+ and Co 2+ , thus accelerating the rapid activation of PMS. This work provides a new perspective for the further development of efficient and rapid PMS photo-activators for environmental remediation in water bodies.
研究领域:
环境科学
·
化学工程
·
材料科学
·
水处理
✓ 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）