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
Molecular Catalysis
·
2021
·
IF 5.062
Huafan Li,Tiantian She,Guofeng Chen,Menghua Sun,Libo Niu,Guoyi Bai
In this paper, a stable Pd/NH 2 -SBA-15 catalyst was prepared by an ammonia evaporation method using amino-functionalized SBA-15 as support. Pd/NH 2 -SBA-15 showed excellent catalytic performance in the selective hydrogenation of phenol to produce cyclohexanone. Furthermore, this Pd/NH 2 -SBA-15 catalyst kept the conversion of phenol and selectivity of cyclohexanone both over 90 % even after 10 runs, much better than Pd/SBA-15 and the previously reported Pd-based catalysts, demonstrating the benefit of amine functionalization on the activity of supported Pd nanoparticles. TEM and XPS results indicate that small Pd particles were highly dispersed on the NH 2 -SBA-15 support and a stronger interaction occurred between the active Pd particles and the amine functionalized SBA-15 support, which could effectively inhibit the agglomeration of the active Pd particles during the reaction and then improve the stability of this catalyst.
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
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Yi Liu,Yuhang Hu,Jiarong Zhang,Jingsheng Zhou,Zhengkun Zhang,Li Wang,Jinglai Zhang
Immobilized ionic liquids are one of the most popular catalysts for the cycloaddition of carbon dioxide (CO 2 ) and epoxides with some distinguished advantages. However, the harsh reaction condition, especially for the high reaction pressure, is still the obstacle for its large-scale application. A series of amino-functionalized pyrazolium ionic liquids are grafted on SBA-15 in this work. Among them, SBA-15-APMPzBr(20) exhibits the best catalytic activity achieving 97.6% product yield under 0.5 MPa CO 2 pressure at 100 °C by using 100 mg SBA-15-APMPzBr(20) for 10 h. No solvent is added in the catalytic system. Moreover, SBA-15-APMPzBr(20) exhibits the good recyclability and generality. Its excellent catalytic performance is attributed to the contribution from both immobilized ionic liquids and the SBA-15 supporter. Besides the mesoporous feature, the hydroxyl groups in SBA-15 promote the ring-opening of substrate, which is testified by the experimental measurements and density functional theory calculations.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Oleo Science
·
2021
·
IF 1.601
Wenyi Chen,Maomao Kou,Shaoyan Lin,Nanjing Zhong
In this study, Candida antarctica lipase B (CALB), Rhizomucor miehei lipase (RML) and Lecitase® Ultra (LU) were immobilized onto the mesoporous silica SBA-15. The glycerolysis performance of the obtained supported lipases (lipase@SBA-15) in solvent systems was carefully investigated. LU@SBA-15 exhibited good glycerolysis performance in solvent-free system, with diacylglycerols (DAG) content and triacylglycerols (TAG) conversion at 52.4 and 98.6% respectively obtained after 12 h reaction at 60°C. CALB@SBA-15 showed good glycerolysis activity in tert-pentanol and tert-butanol systems, with TAG conversion over 90% obtained. In addition, the present CALB@SBA-15 exhibited selectivity for monoacylglycerols (MAG) production, with glycerol to TAG molar ratio increased to 3:1, MAG content over 80% and TAG conversion over 99% could be obtained from both tert-pentanol and tert-butanol systems. However, RML@SBA-15 showed low glycerolysis activity neither in solvent nor in solvent-free systems. The present results favor the practical enzymatic design for MAG and DAG production.
研究领域:
生物化学
·
酶工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 29
·期 5
·1399-1410
·
IF 2.523
Zhang Xin,Chen Fei,Li Yuejin,Duan Yongzheng,Liu Guoxia
In this study, lanthanum-modified the shell–core magnetic nanocomposites with Fe 3 O 4 core and homogeneous mesoporous silica shell (La-SBA-15@Fe 3 O 4 -x) were prepared. The preparation, morphology, composition and magnetic properties of La-SBA-15@Fe 3 O 4 were investigated by TEM, SEM, XRD, VSM and BET. The results suggested that the SBA-15 have successfully encapsulated Fe 3 O 4 and the magnetic particles were decorated by lanthanum. The adsorption experiments were carried out to explore effect of La-SBA-15@Fe 3 O 4 on removal of phosphorus from aqueous solution. The kinetic study of adsorption process was investigated to describe the relationship between adsorption rate and adsorption equilibrium and the Langmuir and Freundlich isotherm models were employed to illustrate adsorption isotherm.
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
RSC Advances
·
2019
·Vol. 9
·期 59
·34581-34588
·
IF 3.049
Li Wang,Yue Zhang,Qingqing Ma,Zhiyong Pan,Baoning Zong
Organosilane-functionalized mesoporous silica SBA-15 was prepared by the co-condensation method and then applied as a support of Pd catalysts for hydrogenation of 2-alkyl-anthraquinone (AQ, alkyl = ethyl, tert-butyl and amyl). The as-prepared Pd catalysts were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, N2 adsorption–desorption, zeta potential, water contact angles measurement and transmission electron microscopy. By extending the pre-hydrolysis time of the silica source, the content of functional groups in the catalysts slightly increases. However, there is an initial increase in zeta potential and water contact angles up to a maximum at 2 h, followed by a decrease as the pre-hydrolysis time was further prolonged. The hydrophobicity created by organic functionalization has positive effects on AQ hydrogenation. The catalyst with the highest hydrophobicity exhibits the highest catalytic activity, with increments of 33.3%, 60.0% and 150.0% for hydrogenation of ethyl-, tert-butyl- and amyl-anthraquinone compared with the unfunctionalized one.
研究领域:
化学工程
·
催化科学
✓ 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
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2018
·
IF 2.32
Zhongyu Wang,Ying Li,Hao Hu,Xia Wang
Novel organic-inorganic mesoporous luminescent polymeric composite materials containing lanthanide (Eu 3+ , Tb 3+ ) complexes covalently bonded to mesoporous silica have been prepared in situ, followed by the polymerization reaction of the monomer 4-vinylphenylboronic acid (VPBA) extending along the mesoporous SBA-15 channels. The obtained materials were investigated by Fourier transform infrared spectroscopy (FT-IR), Ultraviolet absorption spectra (UV), X-ray diffraction (SAXRD), N 2 adsorption/desorption isotherms, Transmission electron microscopy (TEM), thermogravimetry (TG), and luminescence spectroscopy in detail. These characterizations have proved that composite materials possess high surface area, uniform mesoporous structure, good crystallization and relatively excellent luminescence properties. The terminal ligand phen was used to investigate the difference of photo physical and luminescent properties between binary and ternary composite materials. Furthermore, the results have revealed that the composite material Eu(PVPBA-S15) 3 phen showed more efficient intramolecular energy transfer between the europium ion and the ligands, and more excellent characteristic emission of the europium ion under UV irradiation with higher 5 D 0 luminescence quantum efficiency than the composite materials Eu(PVPBA-S15) 3 without phen. The excellent luminescence properties and ordered mesoporous structures could give rise to many potential applications in optical and electronic areas.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 26
·12314-12319
·
IF 3.3
Guofeng Wang,Wenwen Gao,Dong Yun,Chuanzhi Xu,Zhen Li,Chungu Xia
Silica-based mesoporous materials, such as SBA-15, are important supports in the field of catalysis due to their ordered pore channels. The traditional synthesis route of SBA-15 suffers from high autogenous pressure and explosion risks, limiting its industrial production. Herein, a reflux system under ambient pressure was used for the synthesis of SBA-15. Ni nanoparticles were incorporated into the obtained materials to evaluate the quality of the SBA-15 support. The comparative performance of Ni/SBA-15H and Ni/SBA-15R validated there was negligible difference between the SBA-15 prepared by the hydrothermal method (SBA-15H) and the reflux method (SBA-15R). This revolutionary synthesis methodology provides a novel and secure route for the large-scale preparation of SBA-15.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2015
·Vol. 6
·期 7
·2403-2412
·
IF 5.426
Dong Wang,Yujun Zhu,Chungui Tian,Lei Wang,Wei Zhou,Yongli Dong,Qing Han,Yunfei Liu,Fulong Yuan,Honggang Fu
The introduction of a suitable co-catalyst is a promising way to improve the catalytic efficiency of Pt catalysts. Herein, SBA-15 modified with well-dispersed Mo2N nanoparticles (NPs) is synthesized by anchoring phosphomolybdic acid (HPM) on aminated SBA-15 (SBA-15-NH2) primarily, followed by nitridation treatment under NH3. After loading of Pt, the Pt–Mo2N/SBA-15 catalyst with close-contact Pt and Mo2N NPs can be formed. The intensive interaction of Pt and Mo2N benefited from the close contact is verified by XRD and XPS tests. As a result, the ternary Pt–Mo2N/SBA-15 catalysts have shown superior performance to Pt/SBA-15 catalysts for the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol. The TOF over the 1 wt% Pt–Mo2N/SBA-15 catalyst is close to that over the 3 wt% Pt/SBA-15 catalyst, but its selectivity to cinnamyl alcohol (COL) is 2.5 times that of 3 wt% Pt/SBA-15. The promoted activity of Pt–Mo2N/SBA-15 is mainly attributed to the synergistic effect of Pt and Mo2N NPs, which can cause the full development of the catalytic ability of Pt, thus reducing the Pt usage, through increasing the dispersion of Pt NPs and the fraction of Pt0 species in the catalyst.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Zhang Haocui,Xiao Zhourong,Yang Mei,Tian Yajie,Li Guozhu,Zhang Xiangwen,Liu Guozhu
As the only H 2 resource on aircraft from the steam reforming of the jet fuels on board, catalytic steam reforming of JP-10 (one of Jet fuels) over nickel-based catalyst Ni/SBA-15 were first carried out in a fixed bed tube reactor to produce hydrogen on-site or on board. A series of Ni/SBA-15 catalysts with different Ni content (3, 5, 8 and 10.8 wt%) were prepared by a modified incipient wetness impregnation method with addition of sucrose as ligand. And the effect of operation conditions of temperature (630–700 °C), nickel loading, liquid hour space velocity (LHSV = 5, 10, 15 ml/g cat ·h), steam to carbon molar ratio (S/C = 3, 5) on the catalytic activity and selectivity was investigated. It was found that 8Ni/SBA-15 was the optimal catalyst for steam reforming of JP-10 even with a higher LHSV and fuel gas concentration, and approximately 100% conversion of JP-10 with over 80% selectivity to hydrogen under the recommended experimental conditions of 680 °C, S/C of 5, LHSV of 10 ml/g cat ·h. The catalytic activity of 8Ni/SBA-15 dropped slowly to 84% after 6.5 h in the stability test and the carbon deposited was less with just 6% mass loss from TGA measurement (coke deposition rate 0.01g C /g cat h), which ascribed to possible reasons including confine effect of mesochannel of SBA-15, strengthened structure of mesochannels due to embeded Ni particles, and higher temperature to suppress the main carbon producing reaction.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Yuan Cai,Xiaofeng Xu,Hu Wang,Lei Wang,Lulu Chen,Rui Li,Jing Ding,Hui Wan,Guofeng Guan
Production of alternative, clean aviation fuel from biomass synthesis gas via Fischer–Tropsch (FT) synthesis has attracted much attention. In this paper, Al-SBA-15 supported cobalt catalysts with different Al/Si ratios were successfully prepared for the production of aviation fuel by FT synthesis. The physical and acidic properties of the Co/Al-SBA-15 catalysts were characterized by XRF, XRD, N2 adsorption–desorption, TEM, H2-TPR, 27Al NMR, NH3-TPD, and Py-FTIR. The formation of long-chain hydrocarbons was inhibited by the ordered mesoporous structure. Fischer–Tropsch activity and selectivity were demonstrated to be affected by the acidity of the Al-SBA-15 supports. The selectivity turned to lighter iso-paraffin products. Co-based catalyst with Al/Si ratio of 0.01 exhibited the highest selectivity (52.4%) for aviation fuel (C8–C18 products) and much higher ratio of iso-paraffin/normal-paraffin (iso/n) (20.2%). This study might provide useful information for the selective production of aviation fuel via FT synthesis.
研究领域:
化学工程
·
能源科学
✓ 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）