CHEMOSPHERE
·
2021
·
IF 7.086
Jiaxin Mu,Shangyi Li,Jing Wang,Xukai Li,Weirui Chen,Xinyuan Tong,Yiming Tang,Laisheng Li
Herein, we demonstrated the construction of three-dimensional (3D) cerium oxide (CeO x )/SBA-16 nanocomposites for efficient removal of bisphenol A (BPA) via a catalytic ozonation , with a high BPA mineralization up to 60.9% in 90 min. On one hand, the CeO x /SBA-16 mesoporous structured materials presented large surface area and uniform pore distribution, which was conducive to the adsorption of transformation by-products (TBPs) and then, the mass transfer. On the other hand, CeO x /SBA-16 could enhance the ozone utilization efficiency and meanwhile facilitate the formation of OH, the main reactive oxygen species . Through the exploration of dissoluble organic matters and the identification of the reaction intermediates, two BPA degradation pathways were proposed. This approach reported here will benefit the design and construction of mesoporous structured materials for catalytic elimination of hazards to remediate the environment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2022
·Vol. 37
·期 2
·543-553
·
IF 2.909
Jia Yanfei,Wei Jianwen,Yuan Yuan,Geng Linlin,Chen Siqi,Liao Lei
A stable and effective amine-modified adsorbent for CO 2 capture was prepared with the impregnation method using the ZSM-5/SBA-16 (ZS) as support and the tetraethylenepentamine (TEPA) as modifier. The CO 2 adsorption performance was investigated by thermal gravimetric analysis (TGA) in mixed gases (15% CO 2 and 85% N 2 ) at 30–90 °C. At 60 °C, the ZS displayed the highest CO 2 adsorption capacity of 2.80 mmol g −1 at 60% TEPA loading. The adsorption kinetics analysis showed that the adsorption process of amine-modified ZS was dominated by both physical and chemical adsorptions. After five cycles of adsorption/desorption, ZS-T-60 kept better stability with the equilibrium adsorption capacity of the composite material was 2.486 mmol g −1 , which was 11.1% lower than the original adsorption capacity. The composite material ZS showed good CO 2 capture ability, indicating the promising future of these adsorbents for CO 2 adsorption from actual flue gas after desulfurization. Graphical abstract
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2012
·
IF 2.159
Yan-Jing Gu,Bing Yan,Xiao-Fei Qiao
Novel rare earth complex-functionalized mesoporous SBA-16-type hybrid materials are synthesized by the co-condensation of modified 2-methyl-9-hydroxyphenalenone (MHPOSi), from modified 3-(triethoxysilyl)-propyl isocyanate (TEPIC), and tetraethoxysilane (TEOS) in the presence of Pluronic F127 as a template. These inorganic–organic mesoporous hybrids are characterized by FT-IR spectra, small-angle X-ray diffraction (SAXRD), N 2 adsorption–desorption measurements, thermal analysis and spectroscopy. Their photophysical properties, which show novel light conversion properties, are discussed in detail. The Eu 3+ hybrid system shows ultraviolet excitation and visible emission, and the Nd + and Yb 3+ hybrids exhibit visible excitation and NIR emission.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Chunlai Liu,Na Wang,Zelin Meng,Mingyang Song,Heming Zhao,Jianglei Hu,Fengwei Shi
The Knoevenagel reaction is one of the most significant reactions in the industrial synthesis of organic materials, pharmaceuticals, and biological compounds. In this study, 2-cyanoethyltriethoxysilane (CTES) was employed as a functionalizing agent to prepare carboxyl-functionalized silica (SBA-16-Cx) using a one-pot method. Subsequently, carboxyl groups served as anchoring points for Cr³⁺, and MOFs-modified SBA-16 (SBA-16-Cx@MIL) was obtained by in situ synthesis. The resulting materials were characterized using FT-IR, XPS, XRD, N 2 adsorption-desorption analysis, SEM, TEM, 13 C MAS NMR, and TG, which confirmed the successful synthesis of MIL-101 on the support. Meanwhile, the pore size of the composite was reduced from 5.1 nm (SBA-16) to 0.6 nm (SBA-16-C1.0@MIL). The condensation reaction of benzaldehyde with malononitrile was selected as a model reaction. The effects of various factors, including solvents, reactants molar ratios, temperature, catalyst dosage, and reaction time, on the reaction were studied. Under optimized conditions, the conversion rate of benzaldehyde reached 100 % and the catalyst demonstrated excellent stability for repeated use. The reaction follows second-order kinetics (R 2 >0.99), and the activation energy of the reaction was 17.18 kJ/mol. Finally, the mechanism of the catalytic process was proposed. This work provides a green catalytic route for the synthesis of α,β-unsaturated carbonyl compounds.
研究领域:
材料科学
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催化化学
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有机合成
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 45
·17106-17116
·
IF 4.052
Yingjie Xie,Qian Zhao,Guofang Gao,Tingshun Jiang
There is special significance to composite catalysts using SBA-16 nano-cages as carriers in the acid catalysis field. A method for embedding boron atoms onto SBA-16 to increase acidic sites and enhance the acidity of the nano-cages was described. The tungstosilicic acid type ionic liquid (SWIL) was encaged into B-SBA-16 acidic nano-cages to obtain various composite catalysts. The acidic nano-cages and composite catalysts were characterized by FT-IR, TG/DSC, SAXD, BET, SEM, TEM, XPS and 1H NMR analyses. Research confirmed that boron was embedded onto the SBA-16 nano-cages in varying proportions and the obtained B-SBA-16 acidic nano-cages still maintained a high degree of pore ordering. The SWIL was successfully encapsulated into the acidic nano-cages via the immersion method. The cage-encapsulated tungstosilicic acid type ionic liquid catalysts SWIL/B(n)-SBA-16 were applied to catalyze the ketal reaction of cyclohexanone (CYC) with ethylene glycol (EG). The results showed that the conversion of CYC could reach 92.01% along with the yield of cyclohexanone ethylene glycol ketal (CGK) of 83.87% under ideal conditions. The CYC conversion was still nearly 86.86% and the CGK yield was 69.50% even after 8 times of continuous reuse.
研究领域:
化学工程
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催化材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2016
·Vol. 24
·期 1
·45-54
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IF 1.385
Ma Jing,Xu Shangyuan,Chu Jia,Xue Juanqin,Tang Jieli,Qiang Liangsheng
In this paper, a series of metal supported TiO 2 /SBA-16 photocatalysts were successfully synthesized by wet impregnation method. The synthesized samples were characterized by X-ray diffraction (XRD), Raman spectra, N 2 adsorption–desorption, transmission electron microscopy (TEM), UV–visible absorption spectra (UV-vis) and X-ray photoelectron spectroscopy (XPS). It was found that SBA-16 retained the ordered mesostructure after modification. The results shown that loading different metal elements was found to have significant influences on the crystallographic structure and physical properties. Moreover, the prepared materials were evaluated on photodegradation of Rhodamine B (RhB). Experiment results showed that the degradation of RhB by these catalysts follows the pseudo-first-order kinetic model. The effect of metal element on photocatalytic activity can be attributed that the appropriate amounts of metal concentration can enhance the photocurrent due to the reduced electron–hole recombination, which can improve the efficiency of photocatalytic reactions.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2021
·Vol. 29
·期 1
·19-31
·
IF 2.496
Ge Lin,Wei Jianwen,Geng Linlin,Chen Siqi,Liao Lei
An amine-modified ZSM-5/SBA-16 (ZS) micro-/mesoporous composite was synthesized for CO 2 capture using nonionic tri-block copolymer pluronic (F127) as a template, tetraethyl orthosilicate (TEOS) as a silicon source and ZSM-5 zeolite as part of silicon aluminum source by embedding method. The amine-bifunctionalized samples were prepared by first grafting with aminepropyltriethoxysilane (APTES) and then impregnating with different concentrations of tetraethylenepentamine (TEPA). The amine efficiency, adsorption kinetics, thermal stability, regeneration performance and the effects of impregnated amine loadings (30–60%) and temperatures (30–90 °C) on the CO 2 adsorption performance were investigated using a thermal gravimetric analyzer (TGA) in the mixed gases (15 vol% CO 2 and the balance of N 2 ). The best adsorbent after modification of ZSM-5/SBA-16 composite material was screened to study CO 2 adsorption mechanism and adsorption kinetics. With the increase of the TEPA amount, the adsorption capacity of amine-bifunctionalized material first increased and then decreased. At 90 °C, the bifunctionalized ZSM-5/SBA-16 displayed the highest CO 2 adsorption performance of 1.630 mmol/g at the TEPA loading of 55%. The CO 2 adsorption mechanism of the bifunctionalized material was the synergistic effect of physical adsorption and chemical adsorption. After five adsorption/desorption cycle regenerations, the saturated adsorption capacity of the composite material was 1.496 mmol/g, which was only 8.2% lower than the original adsorption capacity. The composites exhibited good CO 2 adsorption performance, indicating the promising industrial applications for CO 2 capture form actual flue gas after desulfurization.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yan Shao,Yifan Yan,Jingshan Wang,Qijie Jin,Haitao Xu,Xueying Zhang
This study reports a simple method for anchoring dispersed Co nanoparticles on SBA-16 mesoporous molecular sieve coating grown on the 3D-printed ceramic monolith (i.e., Co@SBA-16/ceramic). The monolithic ceramic carriers with a designable versatile geometric channel could improve the fluid flow and mass transfer but exhibited a smaller surface area and porosity. The SBA-16 mesoporous molecular sieve coating was loaded onto the surface of the monolithic carriers using a simple hydrothermal crystallization strategy, which can increase the surface area of the monolithic carriers and facilitate the loading of active metal sites. In contrast to the conventional impregnation loading method (Co-AG@SBA-16/ceramic), dispersed Co 3 O 4 nanoparticles were obtained by directly introducing Co salts into the as-made SBA-16 coating (containing a template), accompanied by conversion of the Co precursor and removal of the template after calcination . These promoted catalysts were characterized by X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, Brunauer–Emmett–Teller theory, and X-ray photoelectron spectroscopy. The developed Co@SBA-16/ceramic catalysts exhibited excellent catalytic performance for the continuous removal of levofloxacin (LVF) in fixed bed reactors. Co/MC@NC-900 catalyst exhibited a ∼ 78% degradation efficiency in 180 min compared to that of Co-AG@SBA-16/ceramic (17%) and Co/ceramic (0.7%). The improved catalytic activity and reusability of Co@SBA-16/ceramic was because of the better dispersion of the active site within the molecular sieve coating. Co@SBA-16/ceramic-1 exhibits much better catalytic activity, reusability and long-term stability than Co-AG@SBA-16/ceramic. After a 720 min continuous reaction, the LVF removal efficiency of Co@SBA-16/ceramic-1 in a 2 cm fixed-bed reactor was stable at 55%. Using chemical quenching experiments, electron paramagnetic resonance spectroscopy , and liquid chromatography–mass spectrometry, the possible LVF degradation mechanism and degradation pathways were proposed. This study provides novel PMS monolithic catalysts for the continuous and efficient degradation of organic pollutants .
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2023
·
IF 7.4
Tingting Liu,Yangyang Guo,Lei Luo,Meng Ye,Wen Liu,Tingyu Zhu
Solid amine adsorbents hold promising application prospects in the realm of industrial flue gas decarbonization. Nevertheless, there remains a need for substantial improvement in the cycling stability of solid amine adsorbents. Additionally, the competitive adsorption mechanism of solid amine adsorbents pertaining to flue gas components lacks thorough verification. In this study, amine-grafted micro-mesoporous ZSM-5/SBA-16 adsorbents were synthesized to improve the CO 2 adsorption capacity and investigate the effect of impurity gases on CO 2 adsorption. Various characterization techniques, including X-ray diffraction (XRD), thermogravimetric analysis (TGA), N 2 adsorption, and elemental analysis, were employed to analyze the properties of the adsorbents. The loading analysis of the micro-mesoporous molecular sieve revealed that ZS-A-2.0 exhibited the highest CO 2 adsorption capacity of 41.39 mg/g. Mass spectrometry was utilized to evaluate the co-adsorption experimentation involving multicomponent gases. The breakthrough curves of CO 2 displayed dual stages at low concentrations, suggesting the simultaneous occurrence of physical and chemical adsorption throughout the entire adsorption process. Based on temperature programming desorption (TPD) and in situ Fourier transform infrared spectroscopy (FTIR), the results indicated a notable enhancement in CO 2 adsorption due to the presence of H 2 O. Conversely, the presence of SO 2 and NO exhibited adverse effects on CO 2 adsorption, consequently hindering the formation of carbamate and (RNH 3 ) 2 CO 3 adsorption products. This study presents, for the first time, a comprehensive investigation into the interactive adsorption mechanism and product distribution between CO 2 and impurity gases. The findings presented herein provide valuable insights and essential support for practical flue gas applications.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Qinglong Luo,Lei Liu,Ruiqiang Dong,Zhongfu Cheng,Mingzhe Dong,Zhijian Wu,Jun Li,Xueli Huang
ABSTRACT The removal of boron from aqueous solution and the enrichment of boron from salt lake have attracted more attention. In this work, organo-inorganic hybrid mesoporous boron adsorbents were synthesized by tris(hydroxymethyl)methyl aminomethane (TRIS) grafted onto the meso-porous SBA-15, SBA-16 and MCM-41, respectively. And the structures are characterized by infrared, scanning electron microscopy, energy-dispersive X-ray, mapping, X-ray diffraction, point of zero charge, and Marvin laser particle size analyzer. The results showed that TRIS was successfully grafted onto SBA-15, SBA-16, and MCM-41. The adsorption isotherm and adsorption kinetics were best fitted with Langmuir model and pseudo-second-order rate equation, respectively. The adsorption capacity of the three adsorbents was 15.28, 15.70 and 14.17 mg/g, respectively. And the same functional group has little influence on the boron adsorption capacity of different carrier adsorbents of the same type (organosilicon material). These adsorbents have highly selective adsorption of boron, and maintain good lifetime after adsorption–desorption for 5 times, and the dissolution loss rate of SBA-16-TRIS after ten cycles was 0.93%.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2018
·Vol. 32
·期 5
·e4317
·
IF 3.581
Manman Jin,Guodi Zhang,Zhenmei Guo,Zhiguo Lv
Novel heterogeneous tungsten species in mesoporous silica SBA-16 catalysts based on ship-in-a-bottle methodology are originally reported for oxidizing cyclopentene (CPE) to glutaric acid (GAC) using hydrogen peroxide (H 2 O 2 ). For all W-SBA-16 catalysts, isolated tungsten species and octahedrally coordinated tungsten oxide species are observed while WO 3 crystallites are detected for the W-SBA-16 catalysts with Si/ W = 5, 10, and 20. The specific surface areas and the corresponding total pore volumes decrease significantly as increasing amounts of tungsten incorporated into the pores of SBA-16. Using tungsten-substituted mesoporous SBA-16 heterogeneous catalysts, high yield of GAC (55%) is achieved with low tungsten loading (for Si/W = 30, ~13 wt%) for oxidation of CPE. The W-SBA-16 catalysts with Si/W = 30 can be reused five times without dramatic deactivation. In fact, low catalytic activity provided by bulk WO 3 implies that the highly distributed tungsten species in SBA-16 and the steric confinement effect of SBA-16 are key elements for the outstanding catalytic performance.
研究领域:
化学
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材料科学
·
催化
✓ 已验证
DOI
高影响因子
SOLID STATE SCIENCES
·
2015
·
IF 1.839
Yan-Jing Gu,Bing Yan
A series of organic–inorganic hybrid materials were prepared by linking lanthanide (Eu 3+ , Sm 3+ ) complexes to mesoporous SBA-15/SBA-16 through 8-hydroxybenz[de]anthracen-7-one modified silane (HBA-Si) as linker. The physical characterizations of these hybrids revealed that they all have high surface area, uniformity in mesostructure. The luminescence properties of these covalently bonded materials (denoted as Ln(HBA-SBA-15) 3 phen and Ln(HBA-SBA-16) 3 phen) were compared with ternary complexes (Ln(HBA) 3 phen) (Ln = Eu, Sm). Eu(HBA-SBA-15(16)) 3 phen hybrids display better thermal stability, whose luminescent lifetimes and quantum efficiencies were matchable with those of Eu(HBA) 3 phen complex in spite of its much lower effective condensation of Eu 3+ species. In addition, the luminescent performance of functionalized SBA-15 hybrids was more favorable than that of functionalized SBA-16 hybrids, revealing that SBA-15 was a better host material for lanthanide complex than mesoporous silica SBA-16.
研究领域:
材料科学
·
化学
✓ 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）