JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
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
·
催化化学
✓ 已验证
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
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
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
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
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
·
气体吸附
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
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
·
催化材料科学
✓ 已验证
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
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
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
·
催化科学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2021
·
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
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2019
·
IF 5.128
Xiangping Li,Jianguang Zhang,Bin Liu,Juping Liu,Chuanbin Wang,Guanyi Chen
Non-noble metal(s)-based mesoporous catalysts are one of the promising catalysts for aqueous phase hydrodeoxygenation of lignin-derived phenols to produce hydrocarbons. In this paper, Ni/Al-SBA-15 was prepared through incipient wetness impregnation method and the performance of eugenol hydrodeoxygenation over Ni/Al-SBA-15 was studied. The effect of incipient wetness impregnant on the performance of eugenol hydrodeoxygenation over Ni/Al-SBA-15 was investigated. The materials were characterized by XRD, N 2 -sorption, TEM, FTIR, Py-FTIR, XRF and ICP-MS. In comparison with the traditional incipient wetness impregnation using water as solvent, the activity of Ni/Al-SBA-15 was significantly improved by using ethanol as solvent during the process of incipient wetness impregnation. For Ni/Al-SBA-15, the quantity of total acid was decreased after loading nickel species which was mainly due to the decrease of Lewis acid sites. The strength of Lewis acid in Ni/Al-SBA-15 prepare with ethanol as impregant was enhanced. The yields of propyl cyclohexane and propylbenzene from aqueous phase hydrodeoxygeation of eugenol over Ni/Al-SBA-15-E were increased. The super catalytic behavior of Ni/Al-SBA-15-E was attributed to the synergistic effect between the stronger Lewis acid sites and the intact framework structure of Ni/Al-SBA-15-E.
研究领域:
催化化学
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可再生能源
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Juncheng Yang,Yihong Jia,Benhua Huang,Xiaoyong Li,Lina Guo,Aqun Zheng,Rafael Luque,Yang Sun
1,4-Sorbitan and 1,4-mannitan are important precursors for the synthesis of detergents and pharmaceuticals, derived from mono-dehydration of sugar alcohols (d-sorbitol and d-mannitol). In order to improve mono-dehydration selectivity, functionalized CeO2/SBA-15 materials were synthesized and employed as dehydration catalysts. Characterization revealed that all synthetic catalysts contain cerium dioxide nanoparticles with sizes below 10 nm. All prepared catalysts provided 1,4-sorbitan or 1,4-mannitan as the major dehydration products in water at room temperature, with catalysts being nicely active and stable after several reuses.
研究领域:
催化化学
·
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Tan Mao,Xiaoting Shi,Mengchen Liu,Qiang Su,Youliang Cheng,Changqing Fang,Xueke Luo
Ordered mesoporous materials are one of the mesoporous materials with a pore diameter of 2–50 nm. They are a new kind of materials with uniform pore size, highly ordered nanopores and high specific surface area. SBA-15 is a typical ordered mesoporous material. In addition, polymeric composites based on SBA-15 have been widely used in many fields. At present, the characterization of the pore structure of SBA-15 is usually obtained by chemical or physical experiments. However, due to many uncertain factors in the experiment process, it is impossible to know whether the sample meets the experimental conditions before detecting it. The trial and error cost in this process is too high, and repeated measurement experiments will greatly damage the pore structure. In this paper, using computer to simulate the pore size distribution of SBA-15 based on the pore size distribution maps of SEM and TEM images. Firstly, the image is segmented by threshold, then the aperture data are obtained by the maximum inscribed circle algorithm, and finally the probability density curve of aperture distribution is obtained by a statistical method. The results show that the aperture probability density curve obtained by this method is more similar to the real aperture distribution curve. This method provides a reference for reducing the experimental cost in the process of preparing SBA-15.
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 45
·35453-35460
·
IF 3.84
Chunyan Sun,Feng Zhang,Shengfang Li,Fangqin Cheng
The ordered hexagonal mesoporous silica (SBA-15) encapsulated ammonium molybdophosphate (AMP) was successfully synthesized using low-grade natural clay from Qaidam Basin as silica and aluminum source, through a one-pot synthesis method. The final product was fully characterized, which indicated that the composite material had better AMP dispersion and immobilization in the mesoporous structure of SBA-15. The adsorption capacity of the final product for removing cesium ions in solution was also investigated. Results suggested that Qaidam natural clay is a promising low-cost precursor for the production of mesoporous silicate supports, and the final composite material is effective for the adsorption of cesium ions from solution containing other alkali metal ions.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）