JOURNAL OF POROUS MATERIALS
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2022
·Vol. 30
·期 1
·175-182
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IF 2.523
Liu Jing-Long,Dong Xian-Ping,Jia Ai-Quan,Xin Zhifeng,Zhang Qian-Feng
A series of amorphous RuS 2 and SBA-15 supported RuS 2 materials were prepared by solvothermal method using corresponding tris-dialkyldithiocarbamato ruthenium(III) complexes as precursors. The structures of the catalystline precursors Ru(S 2 CNR 2 ) 3 (R = Me, Et, i Pr), unsupported and supported amorphous RuS 2 -R materials as well as nanocrystalline RuS 2 were characterized and analyzed by IR, powder X-ray diffraction (XRD), thermo-gravimetric analysis (TGA), transmission electron microscope (TEM), N 2 sorption measurement, and temperature-programmed reduction (TPR). Powder X-ray diffraction patterns indicated the transformation of amorphous phase RuS 2 to crystalline RuS 2 with the heating treatment at 400 °C. The catalytic activity of RuS 2 -R/SBA-15 for thiophene hydrodesulfurization (HDS) was also investigated.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 74
·70424-70432
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IF 3.289
Ran Ji,Shangru Zhai,Wei Zheng,Zuoyi Xiao,Qingda An,Feng Zhang
Towards the aerobic oxidation of alcohols, palladium nanoparticle immobilized mesoporous catalysts have been extensively investigated; however, the preparation of efficient catalytic materials without using complexing moieties remains a challenge. Herein, a simple yet effective concept that directly utilizes inorganic ZrSBA-15, a mild acidic framework, as a supporting matrix for Pd NPs was applied. The catalysts were fully characterized using X-ray diffraction, N2 adsorption–desorption isotherms, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy. It was demonstrated that, on the basis of these characterization results, active Pd NPs had been successfully loaded onto the porous framework of ordered ZrSBA-15. More significantly, the method of preparation was also attributed to the catalytic properties of the resultant sample, in which the interactions between Pd species and acidic framework were improved, leading to a uniform dispersion and enhanced stabilization of Pd particles. Meanwhile, Pd/ZrSBA-15 catalysts exhibited expected activity in the aerobic oxidation of benzyl alcohol with at least 95% conversion and 99% selectivity for benzaldehyde. Moreover, the oxidation reaction could be performed smoothly under solvent- and base-free conditions, and the catalyst was recycled several times with negligible loss in selectivity and conversion.
研究领域:
化学
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催化材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2018
·
IF 3.909
Yue Li,Nanjing Zhong,Ling-Zhi Cheong,Jianrong Huang,Hongxiao Chen,Shaoyan Lin
In this study, SBA-15 was modified by a series of silane coupling reagents and later used to immobilize Candida antartica lipase B (CALB). The enzymatic properties of the immobilized CALB samples were studied. In addition, the catalytic performance in glycerolysis of soybean oil for diacylglycerols (DAG) production was also investigated. The highest enzymatic activity up to 6100.00 ± 246.41 U/g was observed from the propyl methacrylate group modified SBA-15 supported CALB. No loss of activity was observed from the propyl methacrylate group modified SBA-15 supported CALB, but a higher-than-initial activity was notably found from 3-aminopropyl group and n -octyl group modified SBA-15 supported CALB after a 4-h incubation in air at 70 °C. 1-isocyanatopropane group modified SBA-15 supported CALB exhibited selectivity for DAG production. DAG content up to 61.90 ± 2.38 wt% and a DAG/MAG ratio at 3.11 ± 0.08 was obtained after a 24-h reaction at 60 °C in a solvent-free system.
研究领域:
生物化学
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酶工程
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食品科学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Yifei Ye,Yuanyuan Cui,Li Yang,Jiaxu Zhang,Jianmin Sun
A novel external-skeleton B-containing ionic liquid modified SBA-15 catalyst BBN-Imi-SBA-15-I (BBN denotes borabicyclo[3.3.1]nonane, Imi represents imidazolium ionic liquid) was successfully constructed by a post-modification method for efficiently catalyzing CO 2 -epoxide coupling reaction under both metal- and solvent-free conditions. 5BBN-Imi-SBA-15-I (5 refers to the molar ratio of Si to B), thanks to its synergistic effects of Lewis acid, weak base sites from tertiary amine and quaternary ammonium, hydrogen bond group and nucleophilic group, displayed good catalytic activity with 97 % product yield and 99 % selectivity at 100 °C, 2 MPa in the absence of cocatalyst. The obtained catalyst demonstrated good recyclability during six consecutive catalytic runs, also presented generality for various mono-substitute epoxides. Through in-situ NH 3 diffuse reflectance infrared Fourier transform spectroscopy (NH 3 -DRIFTS) characterization, the Lewis acidity of organo-boron was verified. Besides, kinetics research also proved the positive effect of multiple active components on efficient catalysis under milder conditions over SiO 2 -based metal-free catalysts.
研究领域:
材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jicheng Wang,Yanhong Quan,Linjie Li,Shunan Yin,Xinxin Ding,Jun Ren
A series of Cu/SBA-15 catalysts with different Cu loadings are prepared by the ammonia evaporation method for the liquid-phase hydrogenation of furfural (FF) to furfuryl alcohol (FA). The results show that the supported Cu loading influences the structure and catalytic activity during FF hydrogenation. The 20Cu/SBA-15 catalyst shows the optimum performance with 99.3 % FF conversion, 99.0 % selectivity to FA, nearly pure FA product, and a turnover frequency reaching up to 81.7h −1 . The effect of Cu loading can be related to Cu dispersion and the interaction between the metal and support, which further promotes the surface Cu + /Cu 0 ratio. Additionally, the correlation of FF conversion with Cu + /Cu 0 ratio confirms that the excellent performance of 20Cu/SBA-15 is mainly derived from the synergy of Cu + and Cu 0 species, although the range of performance is not large. Finally, the optimal reaction conditions are screened using a reaction temperature of 150 °C, a reaction pressure of 4 MPa, a catalyst dosage of 0.1 g, and a reaction time of 60 min. The present study confirms that the Cu loading has a significant effect on the structure of Cu/SBA-15 and nearly pure objective FF product can be feasibly obtained with an appropriate Cu support in the synthesis of FA from FF hydrogenation.
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
Natural Products and Bioprospecting
·
2024
·Vol. 14
·期 1
·1-16
·
IF 4.8
Yang Ya-Ya,Jing Shun-Li,Shao Jia-Li,Chen Ji-Xuan,Zhang Wei-Feng,Wan Si-Yuan,Shen Yu-Ping,Yang Huan,Yu Wei
Functionalized mesoporous materials have become a promising carrier for enzyme immobilization. In this study, Santa Barbara Amorphous 15 (SBA-15) was modified by N-aminoethyl- γ -aminopropyl trimethoxy (R). R-SBA-15 was employed to purify and immobilize recombinant β -glucosidase from Terrabacter ginsenosidimutans (BgpA) in one step for the first time. Optimum pH of the constructed R-SBA-15@BgpA were 7.0, and it has 20 ℃ higher optimal temperature than free enzyme. Relative activity of R-SBA-15@BgpA still retained > 70% at 42 ℃ after 8-h incubation. The investigation on organic reagent resistance revealed that the immobilized enzyme can maintain strong stability in 15% DMSO. In leaching test and evaluation of storage stability, only trace amount of protein was detected in buffer of the immobilized enzyme after storage at 4 ℃ for 33 days, and the immobilized BgpA still maintained > 50% relative activity. It also demonstrated good reusability, with 76.1% relative activity remaining after fourteen successive enzymatic hydrolyses of epimedin A to sagittatoside A. The newly proposed strategy is an effective approach for the purification and immobilization of BgpA concurrently. In addition, R-SBA-15@BgpA was demonstrated to have high efficiency and stability in this application, suggesting its great feasibility and potential to produce bioactive compounds such as secondary glycosides or aglycones from natural products. Graphical Abstract
研究领域:
生物化学
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酶工程
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材料科学
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Yang Xiao,Chao Qu,Jingjing Zhang,Xi Chen,Wenjin Wang,Xuelong Zheng,Qing Ye
The dissociation of water is essential to water gas shift (WGS) reaction, and the presence of oxygen vacancies can facilitate this key step. Herein, a series of perovskite supported Pd single atoms catalysts were prepared via deposition precipitation method. The incorporation of Pd single atoms can effectively promote the formation of oxygen vacancy on the surface of the catalyst, improving the low temperature reducibility, the ratio of Mn 4 + /Mn 3+ and O ads /O lat compared with support. Among all samples, 0.82 Pd/La 0.5 Ca 0.5 MnO 3 /SBA-15 with the most oxygen vacancies presented 83.6 % CO conversion at 400 °C, specific reaction rate (0.54 mol CO g Pd −1 h −1 ), and TOF (3.77✕10 −2 s −1 ). DFT calculation proved that Pd doping can effectively decreased energy barrier of H 2 O dissociation, and promoted the formation of oxygen vacancies. This work provides experimental and theoretical insights into the rational design of highly active perovskite supported Pd single atom catalysts for WGS reaction.
研究领域:
催化化学
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材料科学
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理论计算
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Changchun Ji,Yudong Wang,Ning Zhao
Cu Al hydrotalcite-SBA-15 composite materials are prepared by precipitation-deposition method. The CO 2 adsorption and regeneration process are carried out in a fixed bed reactor . This composite has thermal stability derived from hydrotalcite and moderate regeneration temperature from the porous material SBA-15. The adsorption capacities of the composite are obviously improved compared to the pure SBA-15 or hydrotalcite. When the amount of hydrotalcite is increased to 40 wt%, it has the magnitude of adsorption capacity. The inactivation model can well simulate the CO 2 adsorption process of the composite.
研究领域:
材料化学
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环境科学
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化学工程
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多孔材料
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气体吸附
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2020
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IF 6.551
Lu Huang,Hang Zhang,Tao Zeng,Jianmeng Chen,Shuang Song
The exploration of low-cost, high-performance and stable catalytic materials for sulfate radical-based advanced oxidation processes (SR-AOPs) is of great importance. This study presents Fe 3 O 4 -wrapped SBA-15 mesoporous silica catalyst (Fe 3 O 4 @SBA-15) for persulfate (PS) activation. The Fe 3 O 4 @SBA-15 with an Fe 3 O 4 to SBA-15 weight ratio of 3:1 exhibited an impressive carbamazepine (CBZ) removal efficiency of ~100% after 30 min of SR-AOP at an initial pH of 3.0, a temperature of 25 °C, an initial PS concentration of 300 mg L −1 and a catalyst concentration of 0.50 g L −1 . The primary oxidizing species produced in the system were identified as SO 4 − and HO by electron paramagnetic resonance spectra and radical quenching experiments. Benefiting from the synergetic effects of improved Fe 3 O 4 dispersion and enhanced adsorption of CBZ and PS by SBA-15, the as-obtained heterogeneous Fe 3 O 4 @SBA-15 catalysts offer large numbers of active sites for free radical generation and high surface concentrations of CBZ and PS for SR-AOPs, as verified by physicochemical characterization and Langmuir−Hinshelwood model analysis. In addition, the activity of Fe 3 O 4 @SBA-15 was maintained throughout six successive cycling tests. Various inorganic anions, including Cl − , NO 3 − , HCO 3 − , and CO 3 2− , as well as organic material in natural water, exert a negative impact on the Fe 3 O 4 @SBA-15 catalyzed SR-AOPs and deserve special attention.
研究领域:
环境科学
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催化材料科学
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产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2014
·
IF 3.209
Xiaoyan Liu,Xuezhao Shi,Hongmei Wang,Haixia Zhang
Poor detection of low-abundant proteins is a common problem in most current protein identification schemes. This is attributed partially to the existence of high-abundant protein. Therefore, selective removal of specific proteins prior to analysis is in great demand. In response these needs, we previously described two kinds of ion exchange groups functionalized SBA-15 synthesized by direct silylanization reaction. Herein, we designed and synthesized strong anion, cation and zwitterion functionalized SBA-15 via atom transfer radical polymerization (ATRP). The previous and current materials were characterized and theirs adsorption abilities for some model proteins (bovine serum albumin (BSA), hemoglobin (Hb), myoglobin (Mb) and lysozyme (Lys)) were evaluated. The results demonstrated that different functionalized SBA-15 is capable to selective removal of certain proteins in protein mixture. It also indicated that this sample preparation technique could be potentially applied to reduce the complexity on protein identification for biological samples with a wide dynamic range.
研究领域:
生物化学
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材料科学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
·
IF 4.326
Qiao Chen,Lidan Deng,Zewei Wu,Fang Wang,Xingmao Jiang
Propane dehydrogenation is one of the most admired technologies for propylene production. However, the development of an active and stable catalyst presents a significant challenge. In this study, Pt–Ga/SBA-15 catalysts were prepared via coimpregnation, followed by H2 reduction, and applied in propane dehydrogenation. The Pt–Ga/SBA-15 catalyst with a Ga/Pt molar ratio of 1 exhibited a high propane conversion of up to 60% and high selectivity toward propylene of 98.2% at 550 °C for 10 min, with a propane conversion of 51.6% and propylene selectivity of 99.5% after reaction for 25 h. The physicochemical properties characterized using N2 physisorption, XRD, TEM, XPS, CO chemisorption, and in situ CO–DRIFT spectroscopy reveal that the Pt–Ga alloy nanoparticles were formed on the SBA-15 support after direct reduction with H2. The study of coke formation via temperature-programmed oxidation showed that a large amount of coke was deposited over the support of spent Pt–Ga/SBA-15 catalyst, indicating coke mobility from the active sites to the supports and its contribution to catalyst stability. The activities of spent catalysts could be almost completely recovered via reduction regeneration, during which Pt–Ga alloy retains the original geometrical and electronic structure well. The dilution of Pt ensembles due to the addition of Ga, e.g., Pt–Ga alloy formation, plays an important role in enhancing the catalytic performance for propane dehydrogenation.
研究领域:
化学工程
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催化科学
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DOI
高影响因子
Journal of Cleaner Production
·
2021
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IF 9.297
Huanting Hu,Kangkang Miao,Xiaolin Luo,Sifan Guo,Xueqin Yuan,Fei Pei,Huaming Qian,Guodong Feng
Effective treatment for industrial wastewater that contains high concentration of chlorophenols is urgent and indispensable for environmental governance and human health due to their nonbiodegradable, carcinogenic and cytotoxic properties. Four kinds of Cu-containing mesoporous silica materials were utilized to catalyse Fenton-like treatment of high-concentration chlorophenols wastewater (1.0 g L −1 ). All of chlorophenols in various water matrices could be oxidatively decomposed in 35 min with the catalysis of Cu-doped SBA-15. Cu-doped SBA-15 with a Cu/Si molar ratio of 0.133 had the best catalytic activity in the oxidative degradation of 4-chlorophenol with an apparent reaction rate constant of 0.170 min −1 which was 1.3–3.6 times higher than those with other Cu-containing catalysts. After 300 min reaction, total organic carbon content of 4-chlorophenol solution declined continuously to 23.8% with an advisable utilization efficiency of H 2 O 2 of 26.5%–68.4%. Electron spin resonance tests and quenching experiments demonstrated that Cu-doped SBA-15 had a selective catalytic activity in the decomposition of H 2 O 2 into hydroxyl radicals which dominated the degradation of chlorophenols in wastewater. The redox of Cu(II)/Cu(I) in Cu-doped SBA-15 occurred efficiently, which could be attributed to chemical adsorption and electron transformation of organic molecular fragments onto Lewis acidic sites formed by the incorporation of Cu 2+ ions in SBA-15. The biological toxicity of the treated 4-CP wastewater declined significantly in comparison with that of the original wastewater. Our work provided an effective way of the heterogeneous treatment of high-concentration chlorophenol wastewater.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
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