JOURNAL OF POROUS MATERIALS
·
2019
·Vol. 27
·期 1
·29-35
·
IF 1.947
Li Jie,zhang Jia,Chen Lianxi,Wen Zhuoqiong,Luo Jie,Yu Cui,Wang Pengpeng
In this study, vinyl-functionalized porous silica (V-P-SiO 2 ) and ureido-functionalized porous silica (UD-P-SiO 2 ) have been synthesized separately by using hexadecyl trimethyl ammonium bromide (CTAB) and sodium dodecyl sulfonate (SDS) as mixed templates. The samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectrum (FTIR) and N 2 adsorption–desorption measurement. The results showed that UD-P-SiO 2 with a diversity of morphologies were obtained by judiciously chosen mole ratio of SDS to CTAB (R = n SDS :n CTAB ). On the contrast, the mole ratio of surfactants had less effect on the morphologies of V-P-SiO 2 until the mole ratio of SDS to CTAB was reached 1.6, however, FTIR proved that it had effect on the vinyl groups in the V-P-SiO 2 network framework.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yilai Zhong,Zengyuan Li,Jianchun Qin,Wenlong Li,Chunlin He,Lifeng Chen,Xiangbiao Yin,Mohammed F. Hamza,Yuezhou Wei,Shunyan Ning
Recycling rare earth elements (REEs) from NdFeB magnets alleviates the growing demand for these resources and contributes to environmental protection. Phosphate groups are known for their high adsorption selectivity for rare and precious metals. In this study, a novel phosphorus-functionalized silicon-based adsorption material (PPA@APTES/SBA-15) was synthesized using poly (ethylene glycol)- block -poly (propylene glycol)- block -poly (ethylene glycol) copolymer (P123) as a template, tetraethyl orthosilicate (TEOS) as a silicon source, (3-amino-propyl) trimethoxysilane (APTES) as a coupling agent, and phosphite ester as a functional ligand. This material was designed for the adsorption and separation of Nd and Dy from NdFeB leaching simulants. The batch experiments revealed that PPA@APTES/SBA-15 achieved equilibrium separation of Co and REEs within 10 s, with SF REE/Co ≥ 2018.76. The material exhibited near 100 % adsorption efficiency for Nd and Dy in 6 M HCl solution, along with excellent reusability. Notably, column experiments also demonstrated near complete adsorption efficiency for Nd and Dy. SEM-EDS, TEM, XRD, and N 2 adsorption-desorption isotherms confirmed that PPA@APTES/SBA-15 possessed a uniform hexagonal mesoporous structure and a high specific surface area. TG-DSC analysis demonstrated that the organic loading of PPA@APTES/SBA-15 was 9 %. FT-IR, XPS, and DFT analysis suggested that PPA@APTES/SBA-15 bond metal ions via P OH (P O) groups.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2025
·
IF 4.7
Yuhang Huang,Pingwei Yang,Shaokai Sun,Liyun Mao,Yunyun Zhou,Ying Liu,Juanjuan Peng,Lingzhi Zhao
Porous silica materials can serve as hemostats, offering a promising approach to promote the coagulation speed. The pore structure of porous silica is a critical property, which may influence the hemostatic effectiveness, though its exact role in the hemostasis process remains unclear. Given that the key structural parameters of porous silica, including pore size, surface area, and pore volume, exhibited strong interrelationships that significantly influence each other, we prepared porous silica with pore sizes ranging from 2.5 to 50 nm to study their hemostatic effects by both in vitro and in vivo assessments. The results demonstrated that the mesoporous material MCM-41 with small pore size (2.5 nm) and high specific surface area exhibited superior contact activation capability to the coagulation pathway. In contrast, the macroporous siliceous foam (MSF) with large pore size (50 nm) and large pore volume showed enhanced absorption of blood cells and proteins. The mesoporous SBA-15 with pore size of 5.3 nm displayed intermediate properties between the two materials. The in vivo experiments showed that among the three kinds of porous silica, the MCM-41 provided the highest pro-coagulant capacity in the tail transection rat model with minor bleeding, and the MSF performed the best hemostatic effect in the femoral artery injury rat model with spurting hemorrhage. Our study elucidates the role of pore structure of porous silica as hemostats, which may give hint to the design of such materials.
研究领域:
生物医学工程
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材料科学
·
血液学
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产品关联
DOI
高影响因子
Journal of Nanomaterials
·
2014
·
IF 1.611
Jiancheng Wang,Zhaoliang Peng,Bing Wang,Lina Han,Liping Chang,Weiren Bao,Gang Feng
A series of manganese salts (Mn(NO3)2, MnCl2, MnSO4, and Mn(Ac)2) and silicon materials (silica sand, silica sol, and tetraethyl orthosilicate) were used to synthesize Mn/Si complexes in supercritical water using a tube reactor. X-ray diffraction (XRD), X-ray photoelectron spectrometer (XPS), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) were employed to characterize the structure and morphology of the solid products. It was found that MnO2, Mn2O3, and Mn2SiO4 could be obtained in supercritical water at 673 K in 5 minutes. The roles of both anions of manganese salts and silicon species in the formation of manganese silicon complexes were discussed. The inorganic manganese salt with the oxyacid radical could be easily decomposed to produce MnO2/SiO2 and Mn2O3/SiO2. It is interesting to found that Mn(Ac)2 can react with various types of silicon to produce Mn2SiO4. The hydroxyl groups of the SiO2 surface from different silicon sources enhance the reactivity of SiO2.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 5
·2203-2211
·
IF 2.961
Xie Xiaohua,Tian Suyun,Guo Wentao,Wang Dejia,Wang Ting,Zhang Jian,Xia Baojia
Due to the high theoretical specific capacity, silicon materials have been developed worldwide to meet the requirement of energy storage in lithium ion batteries. But the low conductivity and large volume expansion (300%) of Si usually cause poor cycling stability during charge/discharge processes. Here, a novel approach to fabricating a porous micro-structure of graphene wrapping silicon nanoparticles and polyaniline skeleton is proposed. The polyaniline skeleton grafted silicon nanoparticles is obtained by an in situ polymerization and the graphene sheets further wrap on the skeleton owing to an enhancement of π conjugation between the polyaniline and graphene. Thus, a 3D conductive and porous micro-structure is synthesized, which not only facilitates the electron and lithium ion transfer but also enhances the stability of structure during the volume expansion of Si. Benefiting from the advantages of structure, the electrode can deliver a reversible specific capacity of 2473 mAh g −1 at 0.2 A g −1 and 958 mAh g −1 at 10 A g −1 . The electrode can keep a stable cycling with a capacity retention of 70% and 60% for 100 and 200 cycles at 25 °C, respectively. The method provides a promising strategy for solving the issues of silicon in lithium ion batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 50
·26309-26315
·
IF 3.708
Zheng-Yong Chen,Ya-Yuan He,Hong-Wen Gao
A “dissolving and rebuilding” method was applied to prepare a diatomiteethyleneimine–polymer (PEI) hybrid composite, and its structure and topography were characterized by XRD, SEM, TEM, FTIR, DTG, elemental analysis and ζ-potential. The results indicated that the PEI was efficiently assembled into the SiO2 framework formed from diatomite. Attempts were made to use the composite to remove phenolic pollutants, e.g. phenol, o-chlorophenol and bisphenol A (BPA), from aqueous solution. These adsorptions were to be in accordance with lipid–water-partition law, and their Kaw values were calculated to be 79.1 L kg−1 for phenol, 37.3 L kg−1 for o-chlorophenol and 24.2 L kg−1 for BPA.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
·
2011
·Vol. 71
·期 3
·593-602
·
IF 1.22
Zhang Jun,Yu Meihua,Yuan Pei,Lu Gaoqing,Yu Chengzhong
In this work, a series of nanoporous silica materials have been prepared as adsorbents for volatile (−)-menthol, a molecule widely used in food, pharmacy, and cosmetics. The isothermal release properties of (−)-menthol have been investigated and correlated with the structural parameters of nanoporous absorbents. A rotary evaporation method is used to effectively load (−)-menthol into the nanopores of adsorbents and to prevent the whisker growth during the adsorption. It is demonstrated that the pore size, structure, wall thickness and surface functionality of nanoporous adsorbents are four important parameters to influence the isothermal release of (−)-menthol. By tuning these parameters of nanoporous silica adsorbents, controlled release of (−)-menthol can be achieved. A vesicular silica material with thick wall and hydrophobic functional groups is shown to possess the slowest release performance. Our contribution provides important knowledge for the future applications of nanoporous silica materials in pharmacy and cosmetics.
研究领域:
药学
·
化妆品科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 26
·11705-11711
·
IF 3.591
Junyi Guo,Nan Guo,Zhongjie Du,Chen Zhang,Wei Zou
Organic silicone materials offer numerous benefits and hence hold significant potential in daily applications. However, poor flame-retardant properties may limit their use in the field of fire prevention. In this study, this problem was solved by designing a stable, facile, and effective fabrication method. A silane vinyl melamine/silicone foam (VTMO–APTES–PAA–MF/SI) with excellent flame-retardant properties was obtained through a step-by-step chemical surface modification method. Aminopropyl ethoxy silane (APTES) and vinyl methoxy silane (VTMO) provided cross-linking sites and formed a macromolecular network structure, thus improving the compatibility between the melamine foam (MF) and silicone material. As a result, VTMO–APTES—PAA–MF/SI exhibited a high limiting oxygen index and UL94 flame-retardant rating (31.1 vol%, V-0). Besides, compared with melamine/silicone foam (MF/SI), VTMO–APTES–PAA–MF/SI demonstrated better tensile strength and elongation at break.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Baichuan Gong,Linjuan Ma,Qian Guan,Rong Tan,Cheng Wang,Zhongbing Wang,Kun Wang,Chunli Liu,Chunjian Deng,Wenqing Song,Guisheng Zeng
Superhydrophobic materials with surface drying, self-cleaning, and antibiological pollution characters are broadly used in biotechnology, medicine, and shipbuilding sectors. In this paper, micro-nano silica is modified using a silane-based coupling agent. An organosilicon compound is grafted to the silica surface to obtain a superhydrophobic material with low surface energy . The results show that the superhydrophobic material with a 20 nm particle size silica modified with vinyltriethoxysilane (VTES-SiO 2 ) offers the best properties with a contact angle of 163.32° and a rolling angle of smaller than 3°. Compared with the raw material, the treated silica reveals superhydrophobicity under nano conditions with a rolling angle smaller than 3°. The wettability of the prepared material does not decrease after being placed in the air for 3 months. Moreover, it still maintains self-cleaning performance after being placed in water for one month, showing the potential of long-term use of the material. The prepared materials provide excellent superhydrophobic properties while is environmentally friendly. Thus, this study delivers potential value for the preparation of environmentally friendly superhydrophobic materials with broad application prospects of superhydrophobicity and self-cleaning characters.
研究领域:
材料科学
·
生物技术
·
医学
·
船舶工程
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2018
·
IF 1.712
Wenjuan Yan,Yuhui Wu,Xiang Feng,Chaohe Yang,Xin Jin,Jian Shen
Selective propylene epoxidation to propylene oxide (PO) with hydrogen peroxide (H 2 O 2 ) was carried out in a catalytic semi-batch reactor. High propylene epoxidation activity (44 h − 1 ) was observed over Nb based mesoporous silicate materials Nb-TUD-1 under mild operating conditions. The physical and chemical properties of the Nb based silicates characterized using BET, FTIR, TPD , TEM and UV–Vis revealed that the site isolation and surface acidity are crucial for PO production. Catalyst synthesis methods were investigated for their effects on PO productivity, PO selectivity and H 2 O 2 utilization efficiency. It is found that Nb-TUD-1 material synthesized by the sol–gel method is more active and selective than impregnated materials for liquid phase propylene epoxidation. Surface characterization confirms that thus synthesized Nb-TUD-1 catalysts have more Lewis acidity and less Bronsted acidity compared to the catalysts by impregnation.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Xiaoyan Ji,Rui Xu,Fei Wang,Xun Li
Biodiesel is recognized as green and renewable energy with low carbon intensity and less environmental impacts. The preparation of an economical immobilized lipase becomes much urgent challenge in the enzymatic production of biodiesel. In this study, recombinant Thermomyces lanuginosus lipase (TLL) was immobilized on the surface of silica-containing materials mediated by solid-binding peptides (SBPs). The obtained immobilized biocatalysts were effective in converting the oil from Jatropha curcas into biodiesel. The appropriate attachment mode of SBPs and TLL was investigated firstly, and the results showed that the activity of TLL was not negatively affected only when SBPs were fused at the C-terminus of TLL. Secondly, the immobilization efficiency of different SBPs (CecA, EctP1, VKT) on different silica-containing materials (SiO 2 , zeolite ZSM-5, SAR-100, MCM-41 and Na-Y) was systematically studied and it was concluded that the best immobilization efficiency was achieved for TLL-EctP1 immobilized on zeolite ZSM-5 (TLL- EctP1 @ZSM-5). TLL-EctP1 @ZSM-5 was found great performance in stability of pH, temperature, elution and storage. Eventually, biodiesel yield of 93 wt% was achieved using TLL-EctP1 @ZSM-5 as a biocatalyst to catalyze J. curcas oil for 48 h, and 81% of its initial yield was retained after 7 cycles of reuse. These results highlight the application of solid-binding peptides in enzyme immobilization for biocatalysts used in preparation of biodiesel or other chemicals.
研究领域:
生物化学
·
可再生能源
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产品关联
DOI
高影响因子
Nanoscale
·
2017
·Vol. 10
·期 5
·2275-2284
·
IF 7.367
Ting Song,Piyong Zhang,Tingting Wang,Atif Ali,Heping Zeng
Exploiting solar power for hydrogen production from seawater is a great challenge owing to the corrosive properties of seawater and inadequate visible-light conversion capabilities. Here we report an uncomplicated post-processing method to construct Ti3+ self-doped titanium–silicon material with corrosion resistance. This is a new experimental method to regulate the electrical, optical, and photocatalytic performances of titanium-containing photocatalysts in a controlled way. Moreover, we demonstrate that Ti–O–Si materials with different calcination temperatures can serve as a highly efficient and convenient catalyst for photogeneration of hydrogen from water and simulated seawater. Consequently, the optimized Ti–O–Si (400) sample exhibits impressive enhancement in the photocatalytic hydrogen evolution performance, by nearly 10.0 and 43.1 times compared with TiO2 nanoparticles in water and simulated seawater. The Ti–O–Si (400) with substantial Ti3+ and oxygen vacancies exhibits an excellent photocatalytic H2 production performance due to the improved separation and transmission of the photogenerated electron–hole, the extended visible light response, and corrosion resistance. Our work opens a new door to engineering the intrinsic properties of the titanium-containing materials.
研究领域:
材料科学
·
能源科学
·
化学工程
✓ 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）