DESALINATION
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2024
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IF 8.3
Hua Qiang,Mingxing Shi,Keren Lu,Fengyun Wang,Mingzhu Xia
Mesoporous carbon materials hold significant potential in capacitive deionization (CDI) technology owing to expansive accessible surface area, more adaptable pore structure, excellent conductivity properties and effective surface modification and functionalization. While templating is a common method for synthesizing mesoporous carbons, the commonly used hard and soft templating approaches among them suffer from the challenges of expensive precursors and templating agents, complex procedures, secondary contaminants and difficulties in template removal. In contrast, the self-templating method not only circumvents the traditional template removal or combustion steps but also eliminates the use of organic solvents and hazardous chemicals, thus minimizing environmental impact. In this paper, we have successfully synthesized phosphorus-doped mesoporous carbon with a large average pore size (p aver ) using a green and convenient self-templating method employing dual sodium salts of sodium alginate (SA) and sodium phytate (SP). Compared to single SA (6.76 nm) or SP (3.74 nm) self-templated carbonization, the average pore size of carbon materials obtained from dual self-templated carbonization with a proportional mixture (12.97 nm) is significantly improved. The larger average pore size provides a greater surface area for electrode-electrolyte interactions, allowing for easier access and faster diffusion of ions into the pores, thereby enhancing the electrochemical and capacitive deionization properties of the material. The resulting material demonstrates promising electrochemical and desalination performance as evidenced by possessing a specific capacitance of 175.8 A/g and an adsorption capacity of 19.65 mg/g, underlining its potential for application in capacitive deionization utilizing mesoporous carbon materials with large average pore size.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2015
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IF 2.605
Rujie He,Zhaoliang Qu,Xiangmeng Cheng
Y 2 SiO 5 ceramics were prepared by dry pressing and pressureless sintering using different amount of starch addition as pore-forming agent. With the starch addition amount increases from 10 to 40 wt%, the relative density for porous Y 2 SiO 5 ceramics ranges from 70.4% to 38.3%, the mean pore size ranges from 1.02 to 2.01 μm, the compressive strength ranges from 28.25 to 1.43 MPa, and the room temperature thermal conductivities ranges from 0.81 to 0.18 W/m K. The relatively high strength and low thermal conductivity of porous Y 2 SiO 5 ceramics are believed to be useful for future high-temperature insulating applications.
研究领域:
材料科学
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陶瓷工程
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热绝缘
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DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 12
·1724
·
IF 4.7
Jiaqi Shan,Jia Liu,Jiahui Zhu,Lifei Chen,Ting Xu,Xingfa Ren,Xingzhong Guo
The purpose of this study is to prepare monodisperse silica mesoporous microspheres with narrow pore size distribution to promote their application in the field of liquid chromatography. An improved emulsion method was used to prepare silica mesoporous microspheres, and the rotary evaporation temperature, emulsification speed, dosage of porogen DMF, and dosage of the catalyst NH3·H2O were optimized. Subsequently, these microspheres were respectively treated by alkali–heating, calcination, and sieving. The D50(particle size at the cumulative particle size distribution percentage of 50%) of as–prepared silica mesoporous microspheres is 26.3 μm, and the D90/D10(the ratio of particle size at a cumulative particle size distribution percentage of 90% to a cumulative particle size distribution percentage of 10%) is 1.94. The resultant silica mesoporous microspheres have distinctive pore structures, with a pore volume of more than 1.0 cm3/g, an average pore size of 11.35 nm, and a median pore size of 13.4 nm. The silica mesoporous microspheres with a large particle size, uniform particle size distribution, large average pore size and pore volume, and narrow mesopore size distribution can basically meet the requirements of preparative liquid chromatographic columns.
研究领域:
材料科学
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化学工程
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分析化学
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DOI
PubMed
高影响因子
Materials
·
2022
·Vol. 15
·期 23
·8398-8398
·
IF 3.748
Ze Wang,Zhiqiang He,Bohua Duan,Xinli Liu,Dezhi Wang
Porous NiTi alloys are widely applied in the field of medical implant materials due to their excellent properties. In this paper, porous NiTi alloys were prepared by non-aqueous gel-casting. The influence of solid loading on the process characteristics of slurries and the microstructure and mechanical properties of sintered samples were investigated. The viscosity and the stability of slurry significantly increased with the growth of solid loading, and the slurry had better process characteristics in the solid loading range of 40-52 vol.%. Meanwhile, the porosity and average pore diameter of the sintered NiTi alloys decreased with a rise in the solid loading, while the compressive strength increased. Porous NiTi alloys with porosities of 43.3-48.6%, average pore sizes of 53-145 µm, and compressive strengths of 87-167 MPa were fabricated by gel-casting. These properties meet the requirements of cortical bone. The results suggest that the pore structure and mechanical properties of porous NiTi products produced by gel-casting can be adjusted by controlling the solid loading.
研究领域:
材料科学
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生物医学工程
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机械工程
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 44
·期 3
·1097-1106
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IF 3.069
Shujian Liu,Mingdi Pan,Zhongmin Feng,Yangchun Qin,Yun Wang,Lili Tan,Ting Sun
In this article, a garlic skin-derived porous biomass carbon (GSP-BC) material with an ultra-high specific surface area was prepared using KOH as an activator. The morphology and structure of the GSP-BC were evaluated. The ultra-high surface area, average pore diameter and total pore volume of the GSP-BC are 3686 m2 g−1, 2.43 nm and 1.96 cm3 g−1, respectively, which enable the GSP-BC to have an outstanding adsorption capacity of 1911.8 mg g−1 for tetracycline hydrochloride (TCH). Some important variables such as initial concentration (300–800 mg L−1), contact time, solution pH (3–10), ionic strength, and temperature (290–313 K) were investigated systematically. The experimental data of adsorption kinetics and isotherms were well fitted by the pseudo-second-order model and the Freundlich model, respectively. Furthermore, the adsorption process was spontaneous and endothermic. Moreover, the GSP-BC has excellent adsorption capacity for other tetracycline antibiotics. The findings reveal that it is feasible to use garlic skin waste as the precursor to prepare porous biomass carbon with high surface area.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
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2014
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IF 3.633
Huyan Shi,Fu Liu,Lixin Xue,Huafeng Lu,Qingbo Zhou
Ag-loaded zeolites were synthesized and embedded into the outer layer of poly(vinylidene fluoride) (PVDF) dual-layer hollow fiber membrane (D) using a dry-jet wet-spinning co-extruding technique. The distribution of the Ag-loaded zeolites in the outer layer was confirmed by field emission scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDX). It was found that the D contained only 54% of the amount of Ag-loaded zeolites that were distributed throughout the cross section of PVDF single-layer hollow fiber membrane (S), as calculated by thermogravimetric analysis (TGA). However, D showed excellent antibacterial efficiency and resistance to bacterial adhesion because of the higher concentration of Ag + in the outer layer of the membrane. The surface morphologies , pure water flux, mean pore size, pore size distribution , and thermal stability of both PVDF membranes were also investigated.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2018
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IF 3.927
Hailong Liu,Xiangjun Liao
The effects of additive, fluorocarbon special surfactant (FS-30), on the mechanism of phase inversion, morphology and separation performance of the PVDF membranes formed by non-solvent induced phase inversion (NIPS) method from the PVDF/LiCl/FS-30/DMAc system were investigated. The addition of FS-30 significantly improved membrane performance and achieved a simultaneous increase in the pure water flux and BSA rejection of the membrane, which was of great value for membrane application. With the addition of FS-30, the pure water flux increased from 114.68 LMH of the original membrane M0 to 393.76 LMH of the blend membrane M7. At the same time, the BSA rejection rate of the membrane was also increased continuously when the FS-30 content was less than 5 wt% and reached 99.48% at M5. The change in membrane properties can be attributed to the phase inversion process as well as the morphological structural features of the membrane. The addition of FS-30 increased the porosity and improved the hydrophilicity of the membrane by 28.06%. However, the average pore diameter of the membrane was reduced from 0.339 μm to 0.241 μm and a special “stage pore” structure was produced due to the unique properties of FS-30. Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) imaging showed that FS-30 was lost during the coagulation bath and did not remain on the membrane, but affected the crystal composition of the α-phase and β-phase in PVDF membrane as well as promoted the phase inversion process to instantaneous phase separation. Meanwhile, the effect of FS-30 on the morphology of the membrane was characterized by scanning electron microscopy (SEM), and the morphological changes of the membrane was analyzed from the aspects of thermodynamics and kinetics of the casting solution in combination with the phase inversion process of the membrane. It was found that the influence of FS-30 on the kinetics of the casting solution did not balance the effect on the thermodynamic instability, and the thermodynamic effect still dominated, making the FS-30 blend membrane have a more obvious asymmetric structure. Moreover, the effect of the blend membrane on the rejection of algae in surface water and bacteria in sewage was also characterized with the help of chlorophyll fluorescence technique and bacterial inoculation culture experiments respectively, and the result confirmed that the FS-30/PVDF membranes had excellent properties.
研究领域:
材料科学
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化学工程
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环境科学
·
膜技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）