JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Shaosuo Bing,Jiaqian Wang,Hao Xu,Yanyan Zhao,Yong Zhou,Lin Zhang,Congjie Gao,Li’an Hou
Polyamide (PA) thin-film composite (TFC) reverse osmosis membrane is widely used for desalination , but the selectivity-permeability trade-off and oxidation are two major restrictions on the membrane application. By modifying PA TFC membrane with potassium persulfate (K 2 S 2 O 8 ), we overcame the trade-off relation (the water flux and salt rejection increased by 43.2% and 0.2%, respectively) and improved the chlorine resistance. The modification was demonstrated to be a combination of the interfacial crosslinking between PA layer and polysulfone support with the surficial oxidation of PA layer. The dense crosslinked interface enabled the membrane with higher solute rejection, better chlorine tolerance and long-term stability. Meanwhile, the thinner PA layer contributed to the increase of membrane permeability. Furthermore, the modification method has the application potential in high-performance membrane fabrication in terms of simplicity and high efficiency.
研究领域:
材料科学
·
膜分离技术
·
高分子化学
·
环境工程
·
水处理
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 11
·期 8
·7066-7075
·
IF 1.5
Jiheng Ding,Hongran Zhao,Lin Gu,Shengpei Su,Haibin Yu
This paper reports the synthesis of waterborne epoxy phosphate emulsion (WEP) through the reaction between epoxy resin E44 and phosphoric acid and ammonia neutralization. Synthesized WEP was characterized by FTIR for the confirmation of reaction between epoxy groups and phosphoric acid and SEM for morphology. WEP acted as a modifier in two-component epoxy anticorrosion coating on rusty steel substrate. The anticorrosion properties of the coating on rusty steel were investigated by electrochemical impedance spectroscopy (EIS) and Tafel polarization curve. Tafel polarization curve revealed that waterborne epoxy coating containing WEP had better protection ability which is clearly reflected by the protection efficiency (96.6%). EIS study also showed the higher impedance value for WEP containing coating as compared to pure waterborne epoxy coating.
研究领域:
材料科学
·
腐蚀与防护
·
高分子化学
·
表面工程
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2014
·Vol. 26
·期 2
·884-890
·
IF 1.966
Li Rui,Wang Yan-ze,Mao Zhi-yong,Wang Da-Jian
A remote phosphor coating by using Sr 3 (Al,Si)(O, F) 5 :Ce 3+ (SASF:Ce 3+ ) on glass substrate was prepared by a simple and convenient screen printing method. The crystalline phase and the distribution of SASF:Ce 3+ crystals in coating were investigated by XRD and SEM, respectively. The scattering light and absorption light properties of remote phosphor coating with different thicknesses were discussed through Lambert–Beer’s law. The relationship between luminous efficiency and absorption coefficient was demonstrated. White light emitting diode prototype fabricated with blue chip and the prepared patterned SASF:Ce 3+ remote phosphor in this work showed excellent performances, opening a cost-effective process to generate planar white light.
研究领域:
材料科学
·
光学工程
·
发光材料
·
固态照明
·
功能涂层
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Youtong Wu,Shaoguo Wen,Kaiming Chen,Jihu Wang,Guangyu Wang,Kai Sun
Compared with solvent-based resins, waterborne resins still have defects such as insufficient anti-corrosion efficiency. In this paper, the sulfonated graphene/zinc phosphate composites were prepared as an anti-corrosion filler and doped into waterborne polyurethane resin. The morphology of composites is different from pure zinc phosphate. The optimal corrosion resistance can be obtained by adding 0.5 wt% sulfonated graphene/zinc phosphate fillers characterized by Potentiodynamic polarization curves and EIS analysis The corrosion current density ( i corr ) was 0.4252 μA/cm 2 and the charged transfer resistance (R ct ) was up to 10.937 × 10 3 Ω cm 2 , which show a good potential as anti-corrosive fillers in waterborne coatings system.
研究领域:
材料科学
·
高分子化学
·
表面工程
·
腐蚀与防护
·
涂层技术
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Jingxi Tie,Zhihong Zheng,Xiaomei Zheng,Yaru Hao
The water-soluble protein was extracted from Moringa oleifera seed press cake and tested its performance as a natural coagulant for removing humic acid (HA) from water solution when comparing to polyaluminum chloride (PAC), a commercial coagulant. Influencing factors including pH, coagulant dosage, temperature and suspended solid were investigated in this study. The results indicated that the coagulating efficiencies of HA using the Moringa oleifera seed protein (MOSP) were better than those by PAC under all the experimental conditions at the same dosage. MOSP could increase the zeta potential more efficiently than PAC. The Fourier transform infrared spectra revealed that no new compounds were generated during the coagulation process. Hence, adsorption and charge neutralization could be the main mechanism contributing to the HA removal using MOSP as coagulant. MOSP is an ideal natural coagulant for HA removal.
研究领域:
环境科学
·
水处理技术
·
天然产物应用
·
环境工程
·
胶体化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 65
·37417-37423
·
IF 2.936
Jihui Li,Kang Sun,Changyu Leng,Jianchun Jiang
Reasonable structure design and component selection are crucial to electrochemical performance of supercapacitor electrode materials. Sodium alginate (SA), with a novel structure which can immobilize multivalent metal cations, was used to coordinate with Fe3+ to fabricate a carbon and Fe3O4 composite by an easy sol–gel method. Due to the chelation effect between SA and Fe3+, the carbon composite was constructed into a two-dimensional sheet-like structure, and the Fe3O4 particles were nanosize and homogenously distributed on the surface of the carbon nanosheet. As an electrode material for supercapacitors, the composite electrode showed a high specific capacitance of 550 F g−1 at 1 A g−1 in the potential range from −1.1 to 0 V, and excellent cycling stability of 89% retention after 2000 cycles. The enhanced electrochemical performance could be attributed to the abundant exposed active sites, producing high pseudocapacitance, to the two-dimensional nanosheet structure, facilitating electrolyte transport and to the strong attachment strength, improving cycle life. This environmentally-friendly design can provide an alternative to existing methods, resulting in the development of a two-dimensional carbon/metal oxide composite for energy storage devices.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 86
·45930-45938
·
IF 3.708
Mengmeng Zhang,Hongxia Yan,Xiaowei Yang,Chao Liu
In this paper, graphene oxide (GO) was functionalized with a hyperbranched cyclotriphosphazene polymer, which was synthesized by the repeated reactions of hexachlorotriphosphazene with hexamethylenediamine. Subsequently, the resultant functionalized GO was incorporated into dicyclopentadiene bisphenol dicyanate ester (DCPDCE) to prepare composites. Fourier-transform infrared spectra, X-ray photoelectron spectroscopy, X-ray diffraction and transmission electron spectroscopy were employed to examine the surface functionalization of GO. The effects of functionalized GO on the curing reactivity, mechanical, dielectric, thermal and water resistent properties of DCPDCE resin were investigated systematically. Results show that the addition of modified GO can facilitate the curing reaction of DCPDCE. Meanwhile, the appropriate content of modified GO can enhance the mechanical properties including impact and flexural strengths of DCPDCE resin. When modified GO content is 0.6 wt%, the corresponding composite exhibits slightly higher dielectric constant but lower dielectric loss than pure DCPDCE resin over the testing frequency from 10 to 60 MHz. In addition, the thermal stability and moisture resistance of modified GO/DCPDCE nanocomposties are also superior to that of pure DCPDCE resin.
研究领域:
高分子化学
·
复合材料科学
·
材料物理与化学
·
纳米材料
·
绝缘材料
✓ 已验证
DOI
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2020
·Vol. 67
·期 9
·1715-1720
·
IF 1.554
Shu-Zhen Yang,Zhi-Qiang Dong,Cheng-Cheng Yin,Hui-Juan Yue,Wei-Wei Gao,Feng-Ke Yang
In this paper, a green process for the synthesis and separation of caffeine was reported. Theophylline sodium is used as the raw material, diazabicyclo[5.4.0]undec-7-ene as the catalyst, and Turkey red oil as the solvent, particularly, dimethyl carbonate was adopted in place of high toxic dimethyl sulfate to form a mixture of caffeine and by-product sodium bicarbonate. After converting sodium bicarbonate to sodium carbonate, the solubility difference between caffeine and sodium carbonate at 40°C was for the first time utilized to achieve the purpose of separating caffeine with an excellent yield of 98.4% and a purity of greater than 99.0%. Furthermore, both the reaction mother liquor and separation mother liquor can be recycled and reused during the reaction and separation processes, respectively, with little caffeine loss. No industrial waste was discharged in the process of the improved synthesis and separation, which is therefore environmental friendly.
研究领域:
有机化学
·
药物化学
·
绿色合成
·
分离科学
·
环境科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Baifeng Wu,Xiaofeng Wang,Xuefeng Xia,Qixin Wan,Yangsheng Li,Fan Li
The power conversion efficiency (PCE) of the perovskite solar cell (PSC) has made an illustrious breakthrough in the past ten years. However, it is still a great challenge to fabricate high-quality perovskite films due to the intrinsic high defect-density and internal non-radiative recombination, which has severely hindered the development of PSCs . Herein, a new-type additive guanidinium tetrafluoroborate (GuaBF 4 ) is introduced to improve the perovskite films quality, thus boosting photovoltaic performance of resultant PSCs . It is demonstrated that owing to the synergistic effect of Gua + and BF 4 − , the introduction of GuaBF 4 can improve the quality of CH 3 NH 3 PbI 3 (MAPbI 3 ) films. Through optimizing the concentration of GuaBF 4 , the MAPbI 3 film with GuaBF 4 displays higher crystallinity , enlarged crystal grain and smoother surface. Furthermore, by virtue of the strong interaction between MAPbI 3 and GuaBF 4 , the inclusion of GuaBF 4 can effectively passivate traps/defects in perovskite films, thereby diminishing the non-radiative recombination and promoting the charge carrier transportation. Consequently, a high-performance MAPbI 3 PSC with a PCE of 20.62 %, lessened hysteresis behavior and improved moisture stability is achieved. Our research emphasizes on the significance of the synergistic effect in additives for high-performance PSCs.
研究领域:
材料科学
·
能源科学
·
半导体器件
·
表面化学
·
光电子学
✓ 已验证
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2018
·
IF 2.197
Xiaopo Wang,Kai Kang,Shanshan Zhu,Bo Gao
In this work, experimental density data were reported for six fatty acid methyl esters , including methyl butyrate , methyl valerate , methyl caproate , methyl pelargonate , methyl heptanoate , and methyl caprylate . The densities were measured from 293.15 K to 363.15 K and pressures up to 60 MPa by a vibrating-tube densimeter . The relative uncertainty of the measurement is estimated less than 0.001 with a confidence level of 0.95. The high pressure densities were correlated with a Tait-type equation. The overall average relative deviation between experimental data and calculated results from Tait equation for the six fatty acid esters is 0.010%. The derived thermodynamic properties, such as isobaric thermal expansivity and isothermal compressibility , were obtained from the experimental density results. Additionally, for the studied esters, the molecular parameters of the PC-SAFT equation of state were obtained based on the corresponding vapor pressures and liquid densities. The PC-SAFT equation was used to predict the high pressure densities of the esters, and good agreements were observed.
研究领域:
化学工程
·
热力学
·
流体物理化学
·
生物燃料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2012
·Vol. 2
·期 14
·5983-5989
·
IF 0
Hong-Wen Gao,Dong-Dong Ma,Gang Xu
Many kinds of medicinal plants are used in the treatment of disease, and a proportion of these plants grow tenaciously in soils contaminated with heavy metals. An example of one such medicinal plant is the herb Thlaspi rotundifolium L., which accumulates selenium (Se), and has anti-oxidation, anti-aging, anti-cancer and immunity-adjusting properties, but also simultaneously hyperaccumulates harmful metals such as Cd and Zn from the soil. An interesting model named ‘digging metals@plant then backfilling’ has been suggested, where the metals are removed from the plant by acid treatment, then the nano-pores imprinted with the heavy metals are backfilled from the drinking water. Experimental studies of this idea indicate that it can remove unwanted substances from the herb itself and also from the drinking water, ensuring the safety of the herb tea. Additionally, the Se normally embedded in the herb was not noticeably lost. Thus, this model provides a sustainable solution for the disposal of heavy metals using metal-accumulating plants.
研究领域:
植物生理学
·
环境毒理学
·
食品科学
·
天然药物化学
·
环境修复
·
生物医学工程
·
农业资源利用
✓ 已验证
DOI
ADVANCED SYNTHESIS & CATALYSIS
·
2017
·Vol. 359
·期 5
·841-847
·
IF 5.646
Kui Zeng,Lang Chen,Yi Chen,Yongping Liu,Yongbo Zhou,Chak-Tong Au,Shuang-Feng Yin
The atom-economic and one-pot regio- and stereoselective addition of sodium arenesulfinates to either alkynes or alkenes can be achieved with an iron(III) chloride hexahydrate [FeCl 3 ⋅6 H 2 O] catalytic system to afford β-haloalkenyl and β-chloroalkyl sulfones in moderate to good yields.
研究领域:
有机化学
·
合成化学
·
药物化学
·
催化化学
·
分子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）