CHEMICAL ENGINEERING SCIENCE
·
2014
·
IF 2.613
Chengyun Gao,Minhua Zhang,Zhongyi Jiang,Jiayou Liao,Xianmei Xie,Tinghong Huang,Jing Zhao,Jinshuan Bai,Fusheng Pan
Novel polymer–inorganic hybrid membrane was prepared by incorporating potassium montmorillonite (K + MMT) into chitosan (CS) for the dehydration of water–acetone mixture. The morphology, chemical and physical structure, as well as the hydrophilicity were characterized. The results showed that MMT uniformly dispersed in the chitosan matrix, formed hydrogen bonds with chitosan, and enhanced the thermal stability of the film. The membrane doped with 10 wt% of K + MMT exhibited the highest performance with separation factor of 2200, which was almost 8 times higher than 249 of pristine CS membrane at 50 °C for 5 wt% of water in the feed. The results suggested that the ionized water channel constructed by MMT intergallery in the hybrid membrane could greatly enhance the separation factor of CS membrane. Moreover, a plausible model for water transportation in the CS-K + MMT hybrid membranes was proposed. The results proved that K + MMT had a potential prospect in application for pervaporation .
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Changcheng Sun,Lyumeng Ye,Peng Lu,Xianhui Yan,Jianhang Huang,Zhixiong Tang,Dongyao Chen,Chaoping Cen
The key point to broaden the operating temperature window for synergistic control of NO x and oxygenated volatile organic compounds (OVOCs) with high NO x /VOCs conversion and N 2 /CO 2 selectivity relies on development of appropriate catalysts. Herein, a silver-modified Mn/HZSM-5 catalyst was designed, which achieved an effective NO x and acetone co-removal activity and maintained over 90 % N 2 /CO 2 selectivity at a broad temperature range from 293 to 400 °C. The excellent performance of MnAg/HZSM-5 was due to large surface area, plenty of oxygen vacancies and Lewis acid sites, as well as outstanding oxygen mobility and reducibility that derived from the interactions between Mn 4+ /Mn 3+ and Ag + /Ag 0 . NO x reduction followed both Eley-Rideal and Langmuir-Hinshelwood mechanisms, while acetone hardly replaced NH 3 as a reduction agent. Acetone oxidation underwent acetone → acetate → formate → carbonate → CO 2 and H 2 O following a Mars-van Krevelen mechanism. NH 3 participated in acetone oxidation, forming amide and nitrile species, which caused catalyst deactivation and secondary pollution.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2023
·Vol. 52
·期 12
·1331-1351
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IF 1.2
Chen Zhirong,Yao Yang,Yuan Shenfeng,Yin Hong
Critical temperature, critical pressure and P–T–ρ–X data of acetone–water solutions with water mole fractions in a range of 0–60% were measured to provide fundamental data for CFD simulations. Critical temperatures were determined via observing critical opalescence in fused quartz capillary tubes. Meanwhile, critical pressures were measured by heating acetone–water solutions to its critical temperature in an autoclave. The standard deviations of critical temperature and critical pressure were 0.55 K and 0.029 MPa, respectively. The results indicate that only one phase exists during mixing of acetone with water. Moreover, P–T–ρ–X data under 15 and 20 MPa in the temperature range of 460–550 K were measured in the autoclave. The relative deviation of density was 0.32%. Volume-translated Peng-Robinson and Soave–Redlich–Kwong state equations were used to illustrate the P–V–T–X relationship of acetone–water solutions, and the Peng–Robinson state equation with an average absolute relative deviation of 1.19% between fitting and experimental densities was found more accurate.
研究领域:
化学工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2020
·
IF 2.65
Chang Ma,Lei Liu,Fang Zhang,Yue Zhang,Senlin Hou,Aibing Chen
The hierarchical porous carbon (HPC) materials have rich porous structure , high specific surface area and reasonable porosity for a wide range of applications in many fields, such as catalysis, adsorption, and energy storage, etc. Although some synthetic strategies have been developed, efficient preparing HPC materials remains challenging. In this work, we propose a method to prepare N-doped hierarchical porous carbon (NHPC) by acetone dissolution following co-assembly process. 1-Alkyl-3-methyl imidazole bromide ([C 18 Mim]Br), tetraethyl orthosilicate (TEOS) and resorcinol-formaldehyde were co-assembled to form a pleated sheet composite material, where [C 18 Mim]Br induced formation of the sheet structure and also led to nitrogen doping in the carbon skeleton. TEOS created a mesoporous structure and increased specific surface area, while acetone dissolved the oligomer of the resin, creating a macroporous structure, but destroying the morphology of the sheet. At an appropriate amount of acetone, the resulting NHPC exhibits the hierarchical porous structure, high specific surface area and N-doping characteristics. When used as a supercapacitor material, NHPC exhibits the specific capacitance is as high as 241 F g −1 at 1 A g −1 . Furthermore, the symmetric supercapacitor manufactured with NHPC has a power density of 4.1 kW kg −1 , an energy density of 2.56 Wh kg −1 , and demonstrates excellent cycle stability of up to 92.82%, exhibiting the potential as good supercapacitor materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Yanjun Wu,Jiaojiao Song,Jiang Wang,Qi Shi
In this work, ZIF-300 and ZIF-301 derivatives with tunable ellipsoidal cage sizes were synthesized by adjusting the ratio between the small-sized mIm and large-sized bbIm/cbIm ligands. During ZIFs synthesis, when the amount of the fixed ligand is equimolar to Zn²⁺, adjusting the content of the other ligand does not yield a continuously tunable structure. In contrast, maintaining an excess of one ligand relative to Zn²⁺ and varying the content of the other ligand enables the formation of ZIF derivatives with continuously tunable chemical compositions and ellipsoidal cage sizes. This tunability is likely due to the increased concentration of the fixed ligand, which enhances its competitive coordination ability within the ZIF framework. Consequently, ZIF-300 and ZIF-301 derivatives with adjustable long-axis cage sizes ranging from 6.5 Å to 9.6 Å were successfully prepared. Notably, the small cage-sized ZIF-300-S1 (6.5 × 6.1 Å2) and ZIF-301-S1 (6.5 × 6.6 Å2) exhibited exceptional molecular length separation of acetone (6.4 × 5.8 Å2) and butanol (8.4 × 5.5 Å2). Liquid-phase adsorption and breakthrough experiments confirmed their separation performance, and GCMC simulations provided further insights into the separation mechanism.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 34
·11897-11903
·
IF 4
Ying Liu,Baoteng Li,Sailong Xu,Ying Guo
In this paper, highly dispersed hierarchical coral spheres of CeO2/ZnO have been constructed through a facile template-free hydrothermal strategy, followed by an annealing treatment. The resulting coral spheres exhibit enhanced activity for acetone sensing compared with CeO2 or ZnO as well as excellent cyclability and long-term stability. At the optimum working temperature of 245 °C, by controlling the ratio of Ce/Zn, the highest response of the coral spheres towards 100 ppm acetone is up to 145, which is about 5.5 times that of ZnO coral spheres. The significantly improved gas sensing activity may be ascribed to the well-dispersed and assembled CeO2 nanoparticles on the surface of ZnO coral spheres and the heterojunctions between CeO2 and ZnO, which produced abundant oxygen vacancies in the CeO2/ZnO coral spheres.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 60
·55272-55281
·
IF 3.289
Chengyun Gao,Minhua Zhang,Fusheng Pan,Lingtao Wang,Jiayou Liao,Teng Nie,Jing Zhao,Keteng Cao,Lei Zhan,Zhongyi Jiang
In this study, hybrid membranes incorporated with sulfonated carbon molecular sieves were fabricated and utilized for pervaporation dehydration of an acetone/water mixture. First, carbon molecular sieves (CMS) were synthesized via a hard template method, and sulfonated by concentrated H2SO4 to prepare sulfonated carbon molecular sieves (SCMS). The pore structure, surface properties and morphological features of CMS and SCMS were examined by XRD, FT-IR, TEM, EDX, nitrogen adsorption–desorption and HRTEM. The results showed that the obtained CMS had an ordered mesoporous structure with cylindrical channels and large surface area. After sulfonation, the surface properties of CMS changed from hydrophobic to hydrophilic. Then, SCMS with different contents were incorporated into a chitosan (CS) matrix to fabricate CS-SCMS hybrid membranes. The incorporation of SCMS can simultaneously create more water transportation pathways due to the ordered mesoporous structure and increase the number of hydrophilic sites due to the sulfonic acid groups within the membranes. When the content of SCMS was 2 wt%, an optimum separation performance with a separation factor of 832 and a permeation flux of 1.81 kg m−2 h−1 was acquired, which was increased by 2 times for the separation factor and 1.67 times for the permeation flux compared with those of the pure CS membrane. Meanwhile, the hybrid membrane showed good long-term stability.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Sarju Adhikari,Xiaoyue Yang,Yu Xia
Herein, we report the development of a new photochemical system which enables rapid and tunable disulfide bond reduction and its application in disulfide mapping via online coupling with mass spectrometry (MS). Acetone, a clean and electrospray ionization (ESI) compatible solvent, is used as the photoinitiator (1% volume) in the solvent system consisting of 1:1 alkyl alcohol and water. Under ultraviolet (UV) irradiation (∼254 nm), the acetone/alcohol system produces hydroxyalkyl radicals, which are responsible for disulfide bond cleavage in peptides. Acetone/isopropanol is most suitable for optimizing the disulfide reduction products, leading to almost complete conversion in less than 5 s when the reaction is conducted in a flow microreactor. The flow microreactor device not only facilitates direct coupling with ESI-MS but also allows fine-tuning of the extent of disulfide reduction by varying the UV exposure time. Near full sequence coverage for peptides consisting of intra- or interchain disulfide bonds has been achieved from complete disulfide reduction and online tandem mass spectrometry (MS/MS) via low energy collision-induced dissociation. Coupling different degrees of partial disulfide reduction with ESI-MS/MS allows disulfide mapping as demonstrated for characterizing the three disulfide bonds in insulin.
研究领域:
生物化学
·
分析化学
·
蛋白质组学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Zhao Yang,Yan Xiong,Ting Li,Zhiqing Yang,Bing Hui Chen
Carbon supported Ru-Sn bimetallic catalyst shows excellent performance in room-temperature hydrogenation of acetone, 100% acetone conversion with 100% product selectivity to isopropyl alcohol can be achieved within a short reaction time. Catalyst structure-function relationship reveals a synergetic behavior between Ru and Sn sites, demonstrating the essential correlation between Sn/Ru atomic ratio and the resultant variation in catalytic performance. Room temperature hydrogenation of 4-heptanone was also studied, verifying the consistency of the established structure-function relationship in ketones hydrogenation reactions.
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 MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 17
·14546-14556
·
IF 2.324
Sun Linchao,Yao Zhengjun,Haidry Azhar Ali,Li Zhong,Fatima Qawareer,Xie Lijuan
The paper demonstrated cost-effective one-step hydrothermal process to synthesize TiO 2 microrods modified with Cr 2 O 3 nanoparticles. The crystal structure, microstructure and chemical composition of the obtained materials were characterized by XRD, SEM, TEM and EDS analysis. Subsequently, for gas sensor tests the sensors were fabricated onto a ceramic tube having a designed pair of Au electrodes with four Pt wires. The results indicate that the sensors based on the optimal content of Cr 2 O 3 nanoparticles modified TiO 2 microrods possess excellent gas-sensing performance to acetone. Specifically, the sensor based on optimal 3% Cr 2 O 3 modified TiO 2 microrods exhibited high response (15), fast response/recovery time (5/28 s), outstanding selectivity (against 100 ppm ethanol, methanol and formaldehyde) and good stability (1–40 days) towards 100 ppm acetone at 300 °C. Relying on the analysis, we infer that performance can be controlled by varying the Cr 2 O 3 contents. A plausible sensing mechanism is also discussed to explain the reasons for the enhanced acetone sensing with Cr 2 O 3 –TiO 2 heterostructures.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2020
·Vol. 4
·期 11
·5560-5567
·
IF 5.503
Adeleye Aderemi Timothy,Fengan Han,Guangyi Li,Jilei Xu,Aiqin Wang,Yu Cong,Ning Li
In this work, jet fuel range high-density dicycloalkanes were manufactured from methyl benzaldehyde and acetone, two platform compounds which may be obtained from lignocellulose. Protonated titanate nanotubes (PTNTs), a cheap and easily prepared solid acid catalyst, was first found to be a stable, durable and highly efficient catalyst for the preparation of the jet fuel precursors by the acid-catalyzed aldol condensation of acetone and methyl benzaldehydes. Over this catalyst, high yield (∼76%) of jet fuel precursors was reached under mild reaction conditions. The PTNT catalyst can be repeatedly used without significant deactivation, which is advantageous in real application. On the basis of the characterization, the good performance of the PTNT catalyst can be attributed to its special nanotube morphology, bigger surface area, higher acid site amount and acid strength. After the hydrodeoxygenation of jet fuel precursors in cyclohexane under mild conditions (403 K, 5 MPa, 2 h), high yields (∼90%) of dicycloalkanes were achieved. These dicycloalkanes have higher densities than ordinary jet fuel. Therefore, they may be blended into jet fuel to raise the range (or payload) of airplanes.
研究领域:
能源化学
·
催化材料科学
✓ 已验证
DOI
高影响因子
Reaction Chemistry & Engineering
·
2020
·Vol. 5
·期 3
·539-546
·
IF 3.441
Guangcai Zhang,Lu Zhang,Xuesong Wang,Aicheng Chen,Qinhui Zhang
This work presented microfluidic processing of zeolite films in a capillary microreactor and its potential application for biomass conversion. Uniform and continuous HZSM-5 zeolite films were fabricated under a continuous flow hydrothermal system in which the film thickness could be precisely tuned by flow rate and synthesis time. The catalytic performance of this acidic HZSM-5 film capillary microreactor was evaluated by the continuous flow acetalisation reaction of glycerol with acetone, affording ∼62.61% solketal yield under mild and solvent free conditions. No deactivation was observed even after 100 h, indicating the excellent stability of this HZSM-5 film capillary microreactor. This microfluidic processing strategy provided an extended applicability in the fabrication of zeolite film-based capillary microchannels with a high length-to-diameter ratio or other chip-based microchannel devices.
研究领域:
化学工程
·
生物质转化
·
微流控技术
✓ 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）