CATALYSIS LETTERS
·
2021
·Vol. 152
·期 5
·1495-1505
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IF 3.186
Zhang Yue,Wang Li,Ma Qingqing,Wang Nan,Pan Zhiyong
SBA-15 was modified via post-treatment with (NH 4 ) 2 SiF 6 and (NH 4 ) 3 AlF 6 solution (NSF-T and NAF-T) and applied as support of Pd catalysts for the hydrogenation of 2-ethyl-anthraquinone (EAQ). The characterization results revealed that F could be incorporated into the framework of SBA-15 by forming Si–F bond and the amount of F increased as the molar ratio of F in treating solution to Si species in SBA-15 (F/Si) increased from 0.1 to 0.4 for NSF-T and 0.3 to 0.6 for NAF-T. At the same F/Si, the incorporated amount of F was larger with NSF-T than with NAF-T, and the latter could simultaneously create acid sites in catalysts. The hydrophobicity of catalysts could be effectively improved by incorporating F into SBA-15 supports, which favored the catalytic performance. The catalyst on SBA-15 treated by NSF with F/Si of 0.3 exhibited the high initial activity (0.24 molH 2 ·gPd −1 ·min −1 ) and selectivity (95.5%). Graphic Abstract
研究领域:
催化化学
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材料科学
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DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2019
·
IF 2.752
Xiao Jiang,Qing-Da An,Zuo-Yi Xia,Shang-Ru Zhai,L. Zhong-Cheng,Kai Wang
In this study, N-doped platelet-like metal-loaded Zr/SBA-15 was synthesized and employed for reducing 4-nitrophenol to remove this contaminant from water. Dopamine hydrochloride was used as a novel CN source for the modification of ZrSBA-15. The N doping process occurred readily at a low temperature due to the polymerization of dopamine, which could save energy and simplify the experimental fabrication of catalysts. In addition, polydopamine can immobilize Pd ions in a facile manner and the trapped Pd ions are reduced to Pd nanoparticles due to the reducibility of the polydopamine polymer. The utilization of dopamine allows the catalyst to be obtained in a facile and cost-effective synthetic process, while the production of the CN layer as well as the reduction and immobilization of the Pd ions can occur simultaneously. Characterization of the product showed that the catalyst had a platelet-like structure after decoration with elemental Zr, which enhanced the catalytic reaction compared with the natural fiber-like SBA-15. The optimal Pd loading capacity was determined as ~3.0 wt% and the materials obtained could reduce 4-nitrophenol to 4-aminophenol within 120 s with a conversion ratio above 90%.
研究领域:
催化材料
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环境科学
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化学工程
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2014
·Vol. 38
·期 8
·3853-3861
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IF 3.159
Yu-Long Wang,Lu Zhu,Bo-Long Guo,Su-Wen Chen,Wang-Suo Wu
Two functionalized SBA-15 materials were prepared by a post-grafting method using phosphonate derivatives of diethylethylphosphonate (DEP) and ethylphosphonic acid (PA), which were used as adsorbents for removal of uranium(VI) from aqueous solution. These materials were characterized by FT-IR, NMR, TEM, nitrogen adsorption/desorption experiments, and elemental analysis. The effect on uranium(VI) sorption behaviors of the functionalized SBA-15 was studied. Typical sorption isotherms (Langmuir and Freundlich) were determined for the sorption process, and the maximum sorption capacity was calculated. The influence of organic functional groups on uranium(VI) sorption was also discussed. As a result, SBA-15-ethylphosphonic acid (SBA-15-PA) possessed not only a good sorption ability and a desirable selectivity for U(VI) over a range of competing metal ions but also an excellent reusability, which has potential application in separation of uranium(VI).
研究领域:
环境科学
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材料化学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
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IF 3.7
Yilun Dong,Kang Xue,Zexing He,Chongjun Li,Ruijie Gao,Zhen-Feng Huang,Chengxiang Shi,Xiangwen Zhang,Lun Pan,Ji-Jun Zou
The efficient and cost-effective implementation of ammonia borane (AB) hydrolysis dehydrogenation for hydrogen storage is crucial. This study investigated the role of solid acid Amberlyst-15 (A-15) for hydrogen evolution from AB hydrolysis. Notably, AB hydrogen evolution rate can reach 194.15 ml·min −1 at 30 °C, with a low apparent activation energy of 8.20 kJ·mol −1 . After five cycles of reuse, the reaction involving A-15 could keep a conversion rate of about 93%. The AB hydrolysis follows quasi first-order kinetics with respect to the AB concentration and quasi zero-order kinetics with respect to the A-15 mass. According to the characterization results of XRD, ATR-FTIR, and in-situ MS, the boric acid was the dominant hydrolyzate, while water as a hydrogen donor in this reaction. Furthermore, based on the reasoning that hydrogen bonds between A-15 and AB (aq) promotes the diffusion of AB, release of H 2 and the cleavage of O—H bond of H 2 O, a possible mechanism was proposed.
研究领域:
化学工程
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材料科学
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能源储存
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2016
·Vol. 51
·期 13
·6295-6308
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IF 2.302
Xu Zhifeng,Deng Peihong,Li Junhua,Xu Li,Tang Siping,Zhang Fuxing
This paper reports a new strategy for preparation of 2D molecularly imprinted materials (MIM) through the exploitation of thiol-ene click chemistry. 2D MIM for cholesterol was prepared using cholesterol as the template, acrolyl-modified β-cyclodextrin (acrolyl-β-CD) as the functional monomer, and thiol-modified SBA-15 (thiol-SBA-15) as the supporter. In this method, acrolyl-β-CD molecules were assembled around the templates by formation of template–monomer inclusion compounds. Then the acrolyl-β-CD molecules were anchored to the walls of the mesopores of SBA-15 via the thiol-ene click chemistry. After removal of the template molecules, the resulting recognition sites were formed in the mesopores of SBA-15. TEM, XRD, and N 2 adsorption–desorption analysis results demonstrated that the synthesized MIM had a highly ordered mesoporous structure. Results from FT-IR revealed that acrolyl-β-CDs have been successfully conjugated to SBA-15. The density of β-CDs attached on the MIM is determined by EA and TGA. The equilibrium binding amounts of MIM and non-imprinted materials (NIM) for cholesterol are 53.50 and 25.24 μmol/g, respectively. The 2D MIM exhibited binding affinity and specificity for a group of analytes which have similar size and shape to those of template. The application of the prepared materials as stationary phases in thin layer chromatography was investigated preliminarily. The imprinted materials had higher retention ability for the template than the NIM. The retention factors ( R
f ) of cholesterol on MIM and NIM are 0.62 and 0.81, respectively. The solid phase extraction of cholesterol using MIM as the adsorbent was further investigated. The recoveries of the molecularly imprinted solid phase extraction column for cholesterol were 77.1–94.7 % with relative standard deviations (RSD) of 2.25–6.78 %.
研究领域:
材料科学
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生物化学
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2017
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IF 3.648
Jiang Xiao,Yongzhong Jia,Chenglong Shi,Xingquan Wang,Su Wang,Ying Yao,Yan Jing
A green and efficient liquid–liquid extraction system was developed for the separation of lithium isotopes by using hydrophobic ionic liquids (ILs = [C 4,6,8,10 mim] + [NTf 2 ] − ) as extraction organic phase and benzo-15-crown-5 (B15C5) as complexing agent. The maximum single-stage separation factor α of 6 Li/ 7 Li obtained in this study was 1.029 ± 0.001, indicating 6 Li was enriched in ionic liquid phase while 7 Li was concentrated in the aqueous phase. The lithium ion was extracted into the ionic liquid in the formation of 1:2 complex [Li + (B15C5) 2 ]. The negative data of thermodynamic parameters (∆ H 0 and ∆ G 0 ) suggest that the extraction system was a spontaneous exothermic process . In addition, effective lithium isotopes separation factor and the extraction efficiency of lithium ions can be gained in the condition of lower temperature with softer counter anions in the novel extraction system.
研究领域:
化学
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材料科学
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环境科学
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DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2013
·Vol. 2013
·期 16
·2963-2970
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IF 3.12
Yan-Jing Gu,Bing Yan
Graphical Ln 3+ (Eu 3+ , Nd 3+ , Yb 3+ ) organic–inorganic mesoporous hybrid materials are prepared. The hybrids contain lanthanide complexes covalently grafted to 2-methyl-9-hydroxyphenalenone (MHPO) functionalized ordered mesoporous SBA-15 and with 1,10-phenanthroline as a second ligand. The materials exhibit the characteristic visible (Eu 3+ ) and near-infrared (NIR) luminescence (Nd + and Yb 3+ ) of lanthanides. 9-Hydroxy-2-methyl-phenalenone (MHPO) was synthesized and modified with 3-(triethoxysilyl)propyl isocyanate (TEPIC) through a hydrogen atom addition reaction to achieve a new chemical linkage (named as MHPOSi). SBA-15 mesoporous silica organically functionalized with MHPOSi was synthesized. The MHPOSi was linked to tetraethoxysilane (TEOS) through a condensation process in the presence of Pluronic P123 surfactant as a template. New Ln 3+ (Eu 3+ , Nd 3+ , Yb 3+ ) organic–inorganic mesoporous hybrid materials were prepared, in which the Ln 3+ complexes are covalently attached to SBA-15 and have 1,10-phenanthroline (phen) as a second ligand. The resultant mesoporous hybrids were characterized by FTIR spectroscopy, small-angle X-ray diffraction, N 2 adsorption–desorption measurements, thermal analysis, and UV/Vis spectroscopy. They all have high surface areas, uniform mesostructures, and good crystallinity. The photophysical properties of the functionalized mesoporous SBA-15 networks are discussed in detail and they still present excitation capability in the visible region despite the modification of the organic silane. Subsequently, they exhibit characteristic visible (Eu 3+ ) and near-infrared (NIR) luminescence (Nd + and Yb 3+ ).
研究领域:
材料科学
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光学
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化学
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DOI
高影响因子
Journal of Physical Chemistry C
·
2014
·
IF 4.835
Nana Qian,Zhiming Duan,Yongheng Zhu,Qun Xiang,Jiaqiang Xu
4,4′-Diaminodiphenyl sulfone functionalized SBA-15 (DDS/SBA-15) with various loading amounts of DDS has been prepared via a postsynthesis grafting method. The 2D hexagonal mesoporous structures of these hybrids have been confirmed by small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM), and N2 adsorption–desorption isotherms. The covalent grafting of DDS onto the SBA-15 was further confirmed by Fourier transform infrared spectroscopy (FT-IR). DDS/SBA-15 based quartz crystal microbalance (QCM) sensor shows good selectivity and quick response toward toluene vapor, and the detection limit is down to 20 ppb. Impedance spectroscopy measurements showed that the proton conductivity properties of DDS/SBA-15 depended on the loading amount of DDS. These hybrids demonstrated improved proton conductivities compared with pristine SBA-15, and a highest value of 2.26 × 10–4 S cm–1 has been observed when the DDS loading amount is 0.37 mmol g–1. Therefore, DDS/SBA-15 could serve as a promising candidate for both volatile organic compound (VOC) vapor sensing and proton conducting materials.
研究领域:
材料科学
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化学传感器
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能源材料
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DOI
高影响因子
CARBOHYDRATE RESEARCH
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2012
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IF 2.332
Xingcui Guo,Quan Cao,Yijun Jiang,Jing Guan,Xiaoyan Wang,Xindong Mu
Mesoporous SBA-15 materials functionalized with propylsulfonic acid groups (SBA-15-SO 3 H) were synthesized through a conventional one-pot route. It was used as a catalyst for the selective synthesis of 5-hydroxymethylfurfural (HMF) from the dehydration of fructose using BmimCl as solvent. Reaction time, temperature and fructose concentration were investigated during the HMF synthesis procedure. The catalyst SBA-15-SO 3 H exhibits high fructose conversion (near 100%) and HMF selectivity (about 81%) with good stability in the HMF synthesis. It was a suitable catalyst to produce HMF from renewable carbohydrates in potential industrial process.
研究领域:
化学工程
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催化化学
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产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2013
·
IF 3.365
Liang Chen,Zhen Zheng,Jing Wang,Xinling Wang
A unique redox responsive system for glutathione (GSH) triggered controlled release was prepared by modifying the mesoporous SBA-15 with l -cystine ester linked mPEG chains, in which the former was served as the nanoreservoir of guest molecules and the latter was applied as gatekeepers to block the mesopores. The disulfide bond in l -cystine ester can be effectively cleaved by redox reaction under glutathione of cancer cell level, and then resulting in the release of guests encapsulated in the pores. Fluorescein dye as the model drug was loaded into the mesoporous silica nanoparticles (MSNs) and released in PBS with 10 mM GSH and without GSH respectively to test the controlled release properties of the MSNs using UV–Vis spectra as the detector. The results showed that fluorescein dye in PBS with 10 mM GSH was released much more rapidly. Compared with such a controlled release system based on MCM-41, the SBA-15 based system showed a distinctive release behavior. The MSNs synthesized from SBA-15 can be used as an effective drug controlled release system for biomedical applications, especially for long-term drug delivery.
研究领域:
材料科学
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药物递送
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生物医学工程
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DOI
高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Lidan Deng,Qiao Chen,Xingmao Jiang,Xiaowei Liu,Zheng Wang
Propane dehydrogenation is a promising way to produce propylene . Catalysts with high propane conversion, selectivity to propylene , and stability are vital to this technology. In this work, we determined that the catalytic performance of Pt/SBA-15 can be significantly enhanced by introducing an appropriate amount of indium . A too low ratio of In/Pt (1/8) or too high of a ratio (2/1) is detrimental to the activity of the catalyst. When the nominal ratio of Pt to In is 1/1, the initial propane conversion and selectivity towards propylene over 1Pt1In/SBA-15 are highest among all catalysts tested at 57.06 % and 99.04 %, respectively. The conversion rate decreased to 39.63 % after 28 h of reaction, but selectivity was retained at greater than 99 %. Very little coke was deposited on the used 1Pt1In/SBA-15 catalyst. With catalyst characterization, it was proposed that Pt 1 In 1 alloy nanoparticles with surface-enriched In 2 O 3 were responsible for the selective dehydrogenation of propane.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2022
·
IF 5.062
Fei Wang,Xuyang Li,Xialin Hu,Wenya Zhuang,Jiewei Lai,Wenchao Wang,Xuanrong Sun,Hong Wang,Qingyong Li
FLQY2 is a camptothecin derivative modified by FL118 and proved to be good antitumor activity in vitro . However, its poor solubility leads to the low therapeutic efficacy in vivo . Here, the injectable FLQY2 lyophilized powder was prepared with Kolliphor® HS 15 (HS 15), which was called HS 15-FLQY2. The preparation process of HS 15-FLQY2 was optimized by orthogonal design and the lyophilization process was investigated by single factor experiment. Moreover, the formulation was characterized, the pharmacokinetics study and the antitumor activity were carried out in vivo . As the results, HS 15-FLQY2 (1:1500, w/w) containing 5% mannitol as cryoprotectant showed good appearance and 70% entrapment efficiency. HS 15-FLQY2 revealed low particle size (<16 nm), better homogeneity (PDI <0.2) and remained stable for 24 h in water. In addition, the data of the DSC , XRD and FTIR demonstrated that FLQY2 was distributed within micelles . In vivo , the bioavailability of HS 15-FLQY2 (i.p.) was improved significantly compared with oral CD-FLQY2 (a cyclodextrin inclusion complex of FLQY2). In addition, HS 15-FLQY2 demonstrated higher tumor inhibition effect than capecitabine , confirming the possibility of treatment cancer by the delivery of FLQY2.
研究领域:
药剂学
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肿瘤学
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生物化学
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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）